HomeMy WebLinkAbout20210198 AgroChem Site Plan SWPPP STORMWATER POLLUTION PREVENTION PLAN
(SWPPP)
FOR
AgroChem Building Addition
26 Freedom Way
Sarato a S rin s, New York
February 2021
Applicant:
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881 Murray Road
Middle Grove, New York 12850
Contact: Mike Munter
(518J 584-6174
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Aaron J.Vera, P.E.
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It is a violation of New York State Education Law Article 145 for any person, unless they are acting under the
direction of a licensed professional engineer, to alter this document in any way. If a document bearing the seal of
a licensed professional engineer is altered, the altering engineer shall affix to the document their seal,the notation
"altered by" followed by their signature, the date of such alteration, and a specific description of the alteration.
OO 2021 Verity Engineering, D.P.C.
Table of Contents
SWPPP Certification Requirements............................................................................ii
SWPPPCertification..................................................................................................iv
1.0 PROJECT BACKGROUND .................................................................................1
1.1 Introduction ...................................................................................................1
1.2 Site Characteristics .......................................................................................1
1.2.1 Topography and Drainage Patterns ........................................................1
1.2.2 Wetlands and Waterbodies......................................................................1
1.2.3 Soils .........................................................................................................1
1.2.4 Existing Utilities ......................................................................................2
2.0 EROSION AND SEDIMENT CONTROL............................................................2
2.1 Construction Phasing and Sequence of Operations ......................................2
2.2 Erosion and Sediment Control Practices.......................................................3
2.2.1 Stabilized Construction Entrance ...........................................................3
2.2.2 Concrete Washout ...................................................................................3
2.2.3 Inlet Protection (Insert Type)..................................................................3
2.2.4 Dust Control ............................................................................................3
2.2.5 Topsoil, Seed, and Mulch ........................................................................3
2.3 Maintenance Inspection Schedule.................................................................3
2.4 Construction Chemicals, Litter, and Debris ..................................................4
2.5 Industrial Discharges.....................................................................................4
2.6 Non-Conforming Elements ............................................................................4
3.0 STORMWATER MANAGEMENT PRACTICES ..................................................4
3.1 Methodology ..................................................................................................4
3.2 Pre-Development Drainage Conditions .........................................................5
3.3 Post-Development Drainage Conditions........................................................5
3.4 Pre-Post Development Comparison ...............................................................6
3.5 Stormwater Management Planning...............................................................7
3.5.1 Site Planning ...........................................................................................7
3.5.2 Determine Water Quality Treatment Volume (WQv)...............................8
3.5.3 Runoff Reduction (RRv) Techniques........................................................9
3.5.4 Minimum RRv Required ..........................................................................9
3.5.5 Standard Stormwater Management Practices ........................................9
3.6 Non-Conforming Elements ..........................................................................10
3.7 Operations and Maintenance.......................................................................10
3.8 Summary......................................................................................................11
Annendices
AppendixA.......................................................................................................... Location Map
Appendix B.................................................... Notice of Intent/Acknowledgement of Coverage
Appendix C ...........................................................................................MS4 Acceptance Form
Appendix D ......................................................................SPDES General Permit GP-0-20-001
Appendix E...................................................................................NYS OPRHP Documentation
Appendix F..................................................................................USDA and NCRS Soil Survey
AppendixG .......................................................................................................Drainage Maps
Appendix H ...........................................................NYSDEC Green Infrastructure Worksheets
Appendix I....................................................... Pre-Development Water Quantity Calculations
Appendix J......................................................Post-Development Water Quantity Calculations
Appendix K......................................................................................... Weekly Inspection Form
Appendix L...................................... Post-Construction Operation and Maintenance Checklist
Appendix M..................................................................... Erosion and Sediment Control Plans
Appendix N...........................................................................Environmental Assessment Form
Stormwater Pollution Prevention Plan (SWPPP) i
26 Freedom Way February 2021
SWPPP Certification Requirements
Definitions: For additional definitions of terms and phrases used in this document
refer to Pages 39-47 of GP-0-20-001 SPDES General Permit for Stormwater
Discharges from Construction Activity. GP-0-20-001 is included as Appendix D of
this document.
Owner or Operator - means the person, persons or legal entity which owns or
leases the property on which the construction activity is occurring; an entity that
has operational control over the construction plans and specifications, including the
ability to make modifications to the plans and specifications; and/or an entity that
has day-to-day operational control of those activities at a project that are necessary
to ensure compliance with the permit conditions.
Qualified Inspector - means a person that is knowledgeable in the principles and
practices of erosion and sediment control, such as a licensed Professional Engineer,
Certified Professional in Erosion and Sediment Control (CPESC), Registered
Landscape Architect, New York State Erosion and Sediment Control Certificate
Program holder or other Department endorsed individual(s).
It can also mean someone working under the direct supervision of, and at the same
company as, the licensed Professional Engineer or Registered Landscape Architect,
provided that person has training in the principles and practices of erosion and
sediment control. Training in the principles and practices of erosion and sediment
control means that the individual working under the direct supervision of the
licensed Professional Engineer or Registered Landscape Architect has received four
(4) hours of Department endorsed training in proper erosion and sediment control
principles from a Soil and Water Conservation District, or other Department
endorsed entity. After receiving the initial training, the individual working under the
direct supervision of the licensed Professional Engineer or Registered Landscape
Architect shall receive four (4) hours of training every three (3) years.
It can also mean a person that meets the Quali�ed Professional qualifications in
addition to the Quali�ed Inspector qualifications.
Note: Inspections of any post-construction stormwater management practices that
include structural components, such as a dam for an impoundment, shall be
performed by a licensed Professional Engineer.
Qualified Professional - means a person that is knowledgeable in the principles
and practices of stormwater management and treatment, such as a licensed
Professional Engineer, Registered Landscape Architect or other Department
endorsed individual(s). Individuals preparing SWPPPs that require the post-
construction stormwater management practice component must have an
understanding of the principles of hydrology, water quality management practice
design, water quantity control design, and, in many cases, the principles of
hydraulics. All components of the SWPPP that involve the practice of engineering,
as defined by the NYS Education Law (see Article 145), shall be prepared by, or
under the direct supervision of, a professional engineer licensed to practice in the
State of New York.
Stormwater Pollution Prevention Plan (SWPPP) ii
26 Freedom Way February 2021
Trained Contractor - means an employee from the contracting (construction)
company, identified in Part III.A.6., that has received four (4) hours of Department
endorsed training in proper erosion and sediment control principles from a Soil and
Water Conservation District, or other Department endorsed entity. After receiving
the initial training, the trained contractor shall receive four (4) hours of training
every three (3) years.
It can also mean an employee from the contracting (construction) company,
identified in Part III.A.6., that meets the quali�ed inspector qualifications (e.g.
licensed Professional Engineer, Certified Professional in Erosion and Sediment
Control (CPESC), Registered Landscape Architect, New York State Erosion and
Sediment Control Certificate Program holder, or someone working under the direct
supervision of, and at the same company as, the licensed Professional Engineer or
Registered Landscape Architect, provided they have received four (4) hours of
Department endorsed training in proper erosion and sediment control principles
from a Soil and Water Conservation District, or other Department endorsed entity).
The trained contractor is responsible for the day-to-day implementation of the
SWPPP.
Excerpt from GP-0-20-001 Part III A. 6:
Prior to the commencement of construction activity, the owner or operator must
identify the contractor(s) and subcontractor(s) that will be responsible for installing,
constructing, repairing, replacing, inspecting and maintaining the erosion and
sediment control practices included in the SWPPP; and the contractor(s) and
subcontractor(s) that will be responsible for constructing the post-construction
stormwater management practices included in the SWPPP. The owner or operator
shall have each of the contractors and subcontractors identify at least one person
from their company that will be responsible for implementation of the SWPPP. This
person shall be known as the trained contractor. The owner or operator shall ensure
that at least one trained contractor is on site on a daily basis when soil disturbance
activities are being performed.
The owner or operator shall have each of the contractors and subcontractors
identified above sign a copy of the following certification statement below before
they commence any construction activity:
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26 Freedom Way February 2021
SWPPP Certification
"I hereby certify under penalty of law that I understand and agree to comply with
the terms and conditions of the SWPPP and agree to implement any corrective
actions identified by the qualified inspector during a site inspection. I also
understand that the owner or operator must comply with the terms and conditions
of the most current version of the New York State Pollutant Discharge Elimination
System ("SPDES") general permit for stormwater discharges from construction
activities and that it is unlawful for any person to cause or contribute to a violation
of water quality standards. Furthermore, I am aware that there are significant
penalties for submitting false information, that I do not believe to be true, including
the possibility of fine and imprisonment for knowing violations"
Contractor Information
Contractor:
Address:
Phone:
Fax:
Elements of SWPPP:
Trained Contractor
Name:
Title:
Company Officer
Name:
Title:
Signature: Date:
Site Information
Address:
Stormwater Pollution Prevention Plan (SWPPP) iv
26 Freedom Way February 2021
1.0 PROJECT BACKGROUND
1.1 Introduction
The purpose of this report is to describe the methods that will be utilized to
provide Stormwater Management for the proposed AgroChem Building
Addition at 26 Freedom Way, City of Saratoga Springs, New York. This
project proposes to disturb more than one (1) acre of land, as such the project
is within the jurisdiction of the New York State Department of Environmental
Conservation (NYSDEC) State Pollution Discharge Elimination System
(SPDES) General Permit for Stormwater Discharges from Construction
Activity, GP-0-20-001 and the NYSDEC Stormwater Design Manual (SWDM).
The analysis and design that follows complies with the requirements of this
permit.
1.2 Site Characteristics
The project site is located at 26 Freedom Way, City of Saratoga Springs, New
York, 750 feet north of Adams Road and immediately west of Duplainville
Road. The parcel, tax map number 177.-1-62.212, has an existing area of
±210,003 sq. ft. (±4.821 acres) and is currently developed with an existing
±33,800 sq. ft. industrial building and related site improvements. The site is
located within the City's Industrial, General (INT-G) Zoning District.
Developed industrial properties abut the site to the north and east. Wooded
area abut the site to the south and west.
1.2.1 Topography and Drainage Patterns
The site generally slopes outward to existing infiltration areas to the west,
south, and east.
1.2.2 Wetlands, Waterbodies, and Ecology
No wetlands or waterbodies have been observed on the project site.
1.2.3 Soils
Soil investigations were performed by Nace Engineering, P.C. on 5 June,
2015. Test pitting and infiltration test results are included on the Erosion and
Sediment Control Plan.
Further, the United States Department of Agriculture (USDA) Natural
Resources Conservation Service's (NRCS) National Cooperative Soil Survey
identifies the following soil type within the analyzed drainage area(s):
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26 Freedom Way February 2021
Windsor loamy sand, 3 to 8 percent slopes (WnB)
Hydrologic Soil Group (HSG): A
Depth to restrictive feature: More than 80 inches
Drainage class: Excessively drained
Depth to water table: More than 80 inches
Typical profile: 0 to 1 inch: moderately decomposed plant material
1 to 3 inches: loamy sand (A)
3 to 25 inches: loamy sand (Bw)
25 to 65 inches: sand (C)
The above referenced soils are present within the subject drainage area(s) in
the following quantities:
Soil Name and Symbol HSG % of Site Soils
Windsor loamy sand, 3 to 8 percent slopes (WnB) A 100%
1.2.4 Existing Utilities
Municipal water and sewer are available at the right-of-way, however new
service is not required as this project is a building addition. Electric and
telecom are also available.
1.3 Proposed Project
The project proposes to construct a two-story, steel-framed, 16,050 square
foot building addition and associated parking and loading areas. Additional
improvements include associated stormwater management facilities and
incidental utilities.
2.0 EROSION AND SEDIMENT CONTROL
The proposed project described above shall comply with the New York State
Department of Environmental Conservation SPDES General Permit for
Stormwater Discharges from Construction Activities, Permit No. GP-0-20-001.
The following section of this report outlines and details the structures and
techniques utilized to minimize the transportation of sediments from the
project site and to maintain the quality of nearby water resources.
2.1 Construction Phasing and Sequence of Operations
The foremost method to reduce sediment transport is limiting the area of
disturb soils on a construction site. Whenever possible construction should
proceed in narrowly defined phases at the end of which areas are stabilized
before proceeding to subsequent phases. Per SPDES permit requirements at
no time shall site disturbances exceed five (5) acres at any one time without
prior authorization of the NYSDEC or the authority having jurisdiction.
For a project specific phasing plan please refer to Appendix M, Erosion and
Sediment Control Plans.
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26 Freedom Way February 2021
2.2 Erosion and Sediment Control Practices
2.2.1 Stabilized Construction Entrance
At a minimum one construction entrance shall be provided at the
location shown on the Erosion and Sediment Control Plans. All
construction related vehicles accessing the site shall enter and exit the
site at this defined area. The entrance shall consist of a filter fabric
laid on existing grade and covered with 1" - 4" stone.
2.2.2 Concrete Washout
A concrete washout area shall be installed and properly signed prior to
the first scheduled pour. The concrete washout shall be cleaned when
it reaches 50% of its capacity. All waste shall be removed and properly
disposed. The liner shall be inspected after removing spoils for
punctures or tears. Any maintenance require shall be performed before
placing the washout back into service.
2.2.3 Inlet Protection (Insert Type)
Inlet protection shall be installed in all areas shown on the erosion and
sediment control plans. To ensure proper operation of inlet protection
is important that each device be inspected regularly. Collected
sediment shall be removed and disposed of properly. Damaged devices
shall be replaced as required.
2.2.4 Dust Control
If exposed soils begin to generated dust these areas shall be sprayed
with water to suppress dust. Additionally, sodium chloride or similar
products may be used with approval from the qualified professional and
authorities having jurisdiction.
2.2.5 Topsoil, Seed, and Mulch
All disturbed, non-surfaced areas shall be stabilized by the application
of topsoil, seed, and straw mulch or by utilizing an all-in-one product
such as hydroseed. Any area where final grade has been achieved or
where construction activities have ceased for the next fourteen (14)
calendar days shall be stabilized. Areas which have received topsoil
and seed shall be inspected after rainfall events for rills or other signs
of erosion and repaired or replaced as required.
2.3 Maintenance Inspection Schedule
Maintenance of erosion and sediment control practices is crucial to their
effectiveness at minimizing sediment transport and preserving water quality.
At a minimum all practices employed at any time shall be inspected by a
trained contractor and quali�ed professional once every week. In addition, it
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26 Freedom Way February 2021
is recommended that the trained contractor inspect all practices after any
runoff producing rainfall event. Any deficiencies noted shall be remedied as
soon as practical but not more than a week from the date identified.
If the trained contractor or quali�ed professional encounter repeated
maintenance issues with any erosion control practice, additional or different
erosion and sediment controls may be installed. Any practices employed must
be installed in accordance with the requirements and recommendations in the
New York State Standards and Specifications for Erosion and Sediment
Control, dated November 2016 or current version.
2.4 Construction Chemicals, Litter, and Debris
The contractor shall maintain at all times facilities for the proper storage and
disposal of wastes, litter, and debris generated on-site. All waste materials
shall be stored and disposed in compliance with all federal, state, and local
laws. Daily inspections shall be conducted by the trained contractor to ensure
that construction debris is appropriately managed and is not adversely
affecting neighboring properties.
All chemicals or petroleum products on site shall be stored in a manner
compliant with all applicable federal, state, and local laws. Any spillage of
chemicals or petroleum products on site shall be reported to the authorities
having jurisdiction in accordance with their requirements. A spill cleanup kit
shall be kept on site at all times and an individual familiar with its operation
shall be present on-site.
2.5 Industrial Discharges
This project does not currently propose any individual industrial discharges.
2.6 Non-Conforming Elements
This project does not currently propose any deviations from the current
technical standards provided by the NYSDEC.
3.0 STORMWATER MANAGEMENT PRACTICES
This project is required to provide post-construction stormwater management
practices per Appendix B, Table 2 of the NYSDEC SPDES GP-0-20-001 permit.
The following section presents the existing drainage conditions, proposed
drainage conditions, and the methods and structures utilized to comply with
federal, state, and local regulations. All structures proposed comply with the
NYSDEC Stormwater Design Manual, January 2015 unless specifically stated
otherwise.
3.1 Methodology
For purposes of identifying drainage patterns and estimating runoff rates and
volumes, existing and proposed conditions were analyzed using HydroCAD
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26 Freedom Way February 2021
10.10 5a developed by HydroCAD Software Solutions, LLC. This computer
software uses the TR-20 method developed by the Natural Resources
Conservation Service (NRCS), a division of the United States Department of
Agriculture (USDA).
Local rainfall data was obtained from the Northeast Regional Climate Center
(NRCC) for all storm events analyzed.
3.2 Pre-Development Drainage Conditions
This site is unique in that it was constructed at the time the current
stormwater regulations were in effect. As such, the site currently has existing
stormwater management facilities. For the purposes of this project, based on
the original Stormwater Pollution Prevention Plan for the 2015 project, it is
assumed that there are no discharges from the site. This is a conservative
approach as it will require the infiltration of storm events up to and including
the 100-year.
Table 1
Pre-Development Runoff Rates
Q(cfs) V(ac-ft) Q(cfs) V(ac-ft) Q(cfs) V(ac-ft) Q(cfs) V(ac-ft)
0.00 0.000 0.00 0.000 0.00 0.000 0.00 0.000
3.3 Post-Development Drainage Conditions
The post-development watershed conditions are depicted in Appendix G,
"Proposed Drainage Conditions." As shown, the site is divided into nine (9)
sub-catchments.
SC-1 includes the new addition, a majority of the southern entrance, and
Infiltration Basin #1 (IB-1). This area drains via grassed swale or sheet flow
directly into Infiltration Basin #1. SC-1 has a total area of 80,629 sq. ft., a
composite curve number (CN) of 67 and a time of concentration (Tc) of 6
minutes.
SC-2 includes all of the paved loading area at the rear of the facility. Also
included is the gravel trailer parking area. This area drains to CB-1 and is
directed via a 24" pipe to IB-1. SC-2 has a total area of ±45,698 sq. ft., a
composite curve number (CN) of 95 and a time of concentration (Tc) of 6.0
minutes.
SC-3 includes a portion of the paved access and a grassed swale. This area
discharges through a raised catch basin which functions as an outlet control
device. The area ultimately reaches IB-1 via a closed drainage system. SC-3
has a total area of ±10,137 sq. ft., a composite curve number (CN) of 78 and
a time of concentration (T�) of 6.0 minutes.
SC-4 includes a portion of the existing roof. The area drains to an existing
eave trench and ultimately reaches IB-1 via closed drainage. SC-4 has a total
Stormwater Pollution Prevention Plan (SWPPP) 5
26 Freedom Way February 2021
area of ±10,170 sq. ft., a composite curve number (CN) of 98 and a time of
concentration (Tc) of 6.0 minutes.
SC-5 includes a portion of the existing roof. The area drains to an existing
eave trench and ultimately reaches IB-1 via closed drainage. SC-5 has a total
area of ±8,861 sq. ft., a composite curve number (CN) of 98 and a time of
concentration (T�) of 6.0 minutes.
SC-6 includes the western half of the existing roof. The area drains to an
existing eave trench and ultimately reaches IB-1 via closed drainage. SC-6
has a total area of ±17,838 sq. ft., a composite curve number (CN) of 98 and
a time of concentration (T�) of 6.0 minutes.
SC-7 includes a portion of the access drive in the northeast corner of the site
and a lawn area. The area drains to proposed Dry Well #1. SC-7 has a total
area of ±16,719 sq. ft., a composite curve number (CN) of 77 and a time of
concentration (Tc) of 6.0 minutes.
SC-8 includes a portion of the access drive along the northern side of the
building. The area drains to proposed Dry Well #2. SC-8 has a total area of
±6,949 sq. ft., a composite curve number (CN) of 56 and a time of
concentration (Tc) of 6.0 minutes.
SC-9 includes the majority of the western parking and lawn areas as well as
half of Freedom Way. The area drains to a grassed depression Infiltration
Basin #2 (IB-2).
Refer to Appendix J for development of the curve number, time of
concentration, and calculations utilized in the post-development drainage
analysis. Table 2 below presents the post-development peak runoff rate and
volumes for Discharge Point 1 based on the 1, 10, 25, and 100-year storm
events.
Table 2
Post-Development Runoff Rates
Q(cfs) V(ac-ft) Q(cfs) V(ac-ft) Q(cfs) V(ac-ft) Q(cfs) V(ac-ft)
0.00 0.000 0.00 0.000 0.00 0.000 0.00 0.000
3.4 Pre-Post Development Comparison
Table 3 below compares the post-development peak runoff rates and runoff
volumes to those of post-development discharge points. Figures are based on
the 1, 10, 25, and 100-year storm events.
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Table 3
Pre-Post Development Comparison
Q(cfs) V(ac-ft) Q(cfs) V(ac-ft) Q(cfs) V(ac-ft) Q(cfs) V(ac-ft)
NO NO NO NO NO NO NO NO
CHANGE CHANGE CHANGE CHANGE CHANGE CHANGE CHANGE CHANGE
Post-Development Reduction
Unaltered Hydrology(<5% increase,per GP-0-20-001,App. A, pg. 40)
Post-Development Increase
Table 3 illustrates that the proposed stormwater management system will not
alter hydrology from pre to post-development conditions; defined as an
increase of more than 5% from pre-developed conditions.
3.5 Stormwater Management Planning
As required by the NYSDEC Stormwater Management Design Manual
(SWMDM), January 2015, projects which are subject to the NYSDEC SPDES
GP-0-20-001 permit must complete the following five-step planning process:
3.5.1 Site Planning
Table 3.1 of the NYSDEC SWMDM identifies several practices which
may be utilized during the site planning process to preserve natural
resources and reduce impervious areas. Below are a list of the
practices and a brief explanation of whether or not they were
incorporated into the current plan and how.
Preservation of Natural Resources
Preservation of Undisturbed Areas - The current proposal does not
have an opportunity to preserve an adequate contiguous area for this
practice.
Preservation of Buffers - The current proposal does not have an
opportunity to preserve an adequate contiguous area for this practice.
Reduction of Clearing and Grading - Limits of clearing and grading
have been reduced to the greatest extent practical.
Locating Development in Less Sensitive Areas - As described above,
there are no sensitive environmental areas on the site.
Open Space Design -While this practice is not applicable to the current
proposal, the proposed buildings and parking areas are adjacent to one
another allowing for more contiguous green space.
Soil Restoration - This project proposes to use soil restoration
techniques in all applicable areas.
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26 Freedom Way February 2021
Reduction of Impervious Cover
Road way Red uction - A small roadway extension is proposed. It is
proposed at the City's minimum requirements.
Sidewalk Reduction - The area of sidewalks proposed is as limited as
practical.
Driveway Red uction - The area of driveways proposed is as limited as
practical.
Cul-de-sac Red uction -There are no cul-de-sacs proposed as part of this
project.
Building Footprint Reduction - Building footprints have been reduced
to the minimum required for the operations proposed.
Parking Reduction - The parking provided is the minimum required by
the proposed use. Additionally, banked parking is proposed to further
reduced potential impervious area.
3.5.2 Determine Water Quality Treatment Volume (WQv)
The NYSDEC provides a Microsoft Excel based Green Infrastructure
Worksheet. This worksheet provides calculations for both water quality
and runoff reduction for sub-catchments within the project area. Refer
to Appendix H for documentation.
The standard WQv was calculated for each subcatchment. Some
subcatchments are ultimately treated together, this is summarized
below and reflected in the NYSDEC Green Infrastructure Worksheet,
Appendix H.
Table 4
Water Quality Volume
Stormwater Water Quality SMP
Subcatchment Management 3
Practice (SMP) Volume (ft ) Subtotal
SG1 I B-1 3,737
SC-2 I B-1 4,051
SC-3 I B-1 624
SC-4 I B-1 926
SG5 I B-1 807
SC-6 IB-1* 1,624 11,768
SC-7 DW-1 1,007 1,007
SC-8 DW-2 206 206
SC-9 I B-2 2,384 2,384
TOTAL 15,365
*SC-6 Drains to I B-1 during more common storm events,overflow is directed to I B-2.
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3.5.3 Runoff Reduction (RRv) Techniques
Based upon available site soil data it was determined that infiltration
practices would be acceptable to provide RRv. Refer to section 3.5.5
for Infiltration Basin and Dry Well sizing.
3.5.4 Minimum RRv Required
Per the NYSDEC SWDM Green Infrastructure Techniques are required
for Runoff Reduction. Infiltration was determined to be feasible
based on-site investigations. As such, two (2) Infiltration Basins
and two (2) Dry Wells are proposed to treat the proposed
development. Refer to Appendix H for design and sizing criteria.
The minimum RRv is 8,232 cu. ft. or ±0.189 ac.-ft.
The RRv provided by this project is 15,365 cu. ft. or ±0.353 ac. ft. This
exceeds the minimum and is equal to 100% of the WQv.
3.5.5 Standard Stormwater Management Practices
Infiltration Basins
There are two (2) infiltration basins proposed to treat runoff from the
proposed project.
In�ltration Basin #1 (IB-1) receives runoff from SC-1 through SC-6. IB-
1 is designed with an infiltration rate of 12 in./hr.; 100% pretreatment
is required. Pretreatment for SC-1 is provided by grassed lawn area
and swales. Grading of this area encourages sheet flow and acts as a
filter strip. Subcatchments 2 through 5 are directed to IB-1's forebay.
These areas require a total of 6,406 cu. ft. of pretreatment, the forebay
is sized at 6,434 cu. ft. Pretreatment for SC-6 is provided by an existing
eave trench. Sized at 4 ft. by 4ft. by 144 ft. the eave trench provides
806 cu. ft. of storage below its outlet's rim elevation. Further, modeling
of this trench indicates it entirely infiltrates the 1-year storm event; a
total volume of ±2,900 cu. ft. and more than the required 1,624 cu. ft.
Refer to Table 5 for a summary of each storm event and Appendix J for
sizing.
In�ltration Basin #2 (IB-2) receives runoff from SC-9. IB-2 is designed
with an infiltration rate of 12 in./hr.; 100% pretreatment is required.
Pretreatment for SC-9 is provided by a grassed filter strip. Refer to
Table 5 for a summary of each storm event and Appendix J for sizing.
Stormwater Pollution Prevention Plan (SWPPP) 9
26 Freedom Way February 2021
Dry Wells
Dry Well #1 (DW-1) receives runoff from SC-7. DW-1 is designed with
an infiltration rate of 12 in./hr., pretreatment is provided by a grassed
filter strip. Refer to Table 5 for a summary of each storm event and
Appendix J for sizing.
Dry Well #2 (DW-2) receives runoff from SC-8. DW-2 is designed with
an infiltration rate of 12 in./hr., pretreatment is provided by a grassed
filter strip. Refer to Table 5 for a summary of each storm event and
Appendix J for sizing.
Table 5
Summary of Stormwater Management Practices
3.37 - 1.28 5,104 322.16
9.49 - 1.44 10,046 322.84
15.70 - 1.48 14,140 323.33
23.71 - 1.48 23,271 324.32
0.41 - 0.23 96 326.23
1.99 - 1.00 766 326.58
3.17 - 1.55 1,319 326.70
6.69 - 2.77 2,919 326.91
0.37 - 0.09 172 326.17
1.05 - 0.15 743 328.81
1.47 - 0.34 1,076 330.11
2.35 - 0.92 1,609 330.47
0.00 - 0.00 0 324.75
0.09 - 0.03 29 325.54
0.20 - 0.05 86 326.23
0.45 - 0.07 281 327.89
3.6 Non-Conforming Elements
This project does not currently propose any deviations from the current
technical standards provided by the NYSDEC.
3.7 Operations and Maintenance
Regular inspections and maintenance of the post-construction stormwater
management system is the responsibility of the property owner or other
designated party. Currently the entity responsible for maintenance of this
facility is:
Stormwater Pollution Prevention Plan (SWPPP) 10
26 Freedom Way February 2021
AgroChem, Inc.
26 Freedom Way
Saratoga, New York 12866
For the first year of operation, commencing upon filing of a Notice of
Termination (NOT) with the NYSDEC, an inspection of the facility shall be
conducted every six (6) months by a New York State licensed professional
engineer. For subsequent years inspections may be conducted annually.
Inspection and maintenance checklists are included in Appendix L. Records
of inspections should be maintained on-site and any recommendations for
repairs or replacement of stormwater management facilities shall be made in
a timely manner.
In addition to these annual inspections, the property owner or property
manager should familiarize themselves with the purpose and operation of any
permanent stormwater management facilities. After heavy rainfalls it should
be noted if any facilities appear to have damaged or have ceased normal
operations. Within a forty-eight (48) hours after a heavy rainfall event,
standing water should not be visible in infiltration or flow-through practices
such as Stormwater Planters. If any of these anomalies are witnessed the
inspecting engineer should be notified and a plan to remedy these deficiencies
should be prepared.
3.8 Summary
This Stormwater Pollution Prevention Plan presents the analysis and design
of the Stormwater Management System and components for the AgroChem
Building Addition at 26 Freedom Way. The post-development stormwater
runoff system utilizes on-site infiltration that complies with the requirements
of the NYSDEC. The project plans show the locations, sizes, and shapes of
stormwater management practices, including all stormwater management
facilities.
This stormwater management system, when constructed as designed, will
function adequately and will not adversely affect downstream watercourses,
structures or properties.
Respectfully submitted:
�+•��
Aaron J. Vera, P.E.
Principal Engineer
Verity Engineering, D.P.C.
Stormwater Pollution Prevention Plan (SWPPP) 11
26 Freedom Way February 2021
Appendix A
Location Map
Stormwater Pollution Prevention Plan (SWPPP) A
26 Freedom Way February 2021
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1 of 1
Appendix B
Notice of Intent/Acknowledgement of Coverage
Stormwater Pollution Prevention Plan (SWPPP) B
26 Freedom Way February 2021
I �644��982� �
NOTICE OF INTENT
New York State Department of Environmental Conservation
_ Division of Water
� 625 Broadway, 4th Floor NYR[[[[[[
- Albany, New York 12233-3505
(for DEC use onlp)
Stormwater Discharges Associated with Construction Activity Under State
Pollutant Discharge Elimination System (SPDES) General Permit # GP-0-20-001
All sections must be completed unless otherwise noted. Failure to complete all items may
result in this form being returned to you, thereby delaying your coverage under this
General Permit. Applicants must read and understand the conditions of the permit and
prepare a Stormwater Pollution Prevention Plan prior to submitting this NOI. Applicants
are responsible for identifying and obtaining other DEC permits that may be required.
- IMPORTANT-
RETURN THIS FORM TO THE ADDRESS ABOVE
OWNER/OPERATOR MUST SIGN FORM
Owner/Operator Information
Owner/Operator (Company Name/Private Owner Name/Municipality Name)
A g r o C h e m , I n c
Owner/Operator Contact Person Last Name (NOT CONSULTANT)
R o b e r t
Owner/Operator Contact Person First Name
D e M a r c o
Owner/Operator Mailing Address
2 6 F r e e d o m W a y
City
S a r a t o g a S p r i n g s
State Zip
N Y 1 2 8 6 6 - �
Phone (Owner/Operator) Fax (Owner/Operator)
5 1 8 - 2 2 6 - 4 8 5 0 � - � - �
Email (Owner/Operator)
r d e m a r c o@ a g r o c h e m i n c . c o m
FED TAX ID
m - (not required for individuals)
� Page 1 of 14 �
I 64����982� �
Project Site Information
Project/Site Name
A g r o C h e m B u i 1 d i n g A d d i t i o n
Street Address (NOT P.O. BOX)
2 6 F r e e d o m W a y
Side of Street
O North O South � East O West
City/Town/Village (THAT ISSUES BUILDING PERMIT)
C i t y o f S a r a t o g a S p r i n g s
State Zip County DEC Re ion
N Y 1 2 8 6 6 - � S a r a t o g a 5�
Name of Nearest Cross Street
D u p 1 a i n v i 1 1 e R o a d
Distance to Nearest Cross Street (Feet) Project In Relation to Cross Street
8 0 0 � North O South O East O West
Tax Map Numbers Tax Map Numbers
Section-Block-Parcel
1 7 7 . - 1 - 6 2 . 2 1 2
1. Provide the Geographic Coordinates for the project site. To do this, go to the
NYSDEC Stormwater Interactive Map on the DEC website at:
https://gisservices.dec.ny.gov/gis/stormwater/
Zoom into your Project Location such that you can accurately click on the centroid of
your site. Once you have located the centroid of your project site, go to the bottom
right hand corner of the map for the X, Y coordinates. Enter the coordinates into the
boxes below. For problems with the interactive map use the help function.
X Coordinates (Easting) Y Coordinates (Northing)
-7 3 8 3 5 4 3 0 6 2
Ex. -73.749 Ex. 42.652
2. What is the nature of this construction project?
� New Construction
O Redevelopment with increase in impervious area
O Redevelopment with no increase in impervious area
� Page 2 of 14 �
I 4��7��9829 �
3. Select the predominant land use for both pre and post development conditions.
SELECT ONLY ONE CHOICE FOR EACH
Pre-Development Post-Development
Existing Land Use Future Land Use
� FOREST O SINGLE FAMILY HOME Number of Lots
� PASTURE/OPEN LAND � SINGLE FAMILY SUBDIVISION �
� CULTIVATED LAND � TOWN HOME RESIDENTIAL
� SINGLE FAMILY HOME � MULTIFAMILY RESIDENTIAL
� SINGLE FAMILY SUBDIVISION � INSTITUTIONAL/SCHOOL
� TOWN HOME RESIDENTIAL � INDUSTRIAL
� MULTIFAMILY RESIDENTIAL � COMMERCIAL
� INSTITUTIONAL/SCHOOL � MUNICIPAL
0 INDUSTRIAL � ROAD/HIGHWAY
� COMMERCIAL � RECREATIONAL/SPORTS FIELD
� ROAD/HIGHWAY � BIKE PATH/TRAIL
� RECREATIONAL/SPORTS FIELD � LINEAR UTILITY (water, sewer, gas, etc. )
� BIKE PATH/TRAIL � PARKING LOT
� LINEAR UTILITY � CLEARING/GRADING ONLY
� PARKING LOT � DEMOLITION, NO REDEVELOPMENT
� OTHER � WELL DRILLING ACTIVITY * (Oil, Gas, etc. )
O OTHER
*Note: for gas well drilling, non-high volume hydraulic fractured wells only
4. In accordance with the larger common plan of development or sale,
enter the total project site area; the total area to be disturbed;
existing impervious area to be disturbed (for redevelopment
activities) ; and the future impervious area constructed within the
disturbed area. (Round to the nearest tenth of an acre.)
Future Impervious
Total Site Total Area To Existing Impervious Area Within
Area Be Disturbed Area To Be Disturbed Disturbed Area
�'� �'� �'� �'�
5. Do you plan to disturb more than 5 acres of soil at any one time? O Yes � No
6. Indicate the percentage of each Hydrologic Soil Group(HSG) at the site.
A B C D
1 0 0 0 � o � o � °
0
7. Is this a phased project? O Yes � No
Start Date End Date
8. Enter the planned start and end � / � / � _ � / � / �
dates of the disturbance 0 3 0 1 2 0 2 1 1 2 3 1 2 0 2 1
activities.
� Page 3 of 14 �
I �6����982� �
9. Identify the nearest surface waterbody(ies) to which construction site runoff will
discharge.
Name
n / a
9a. Type of waterbody identified in Question 9?
� Wetland / State Jurisdiction On Site (Answer 9b)
� Wetland / State Jurisdiction Off Site
� Wetland / Federal Jurisdiction On Site (Answer 9b)
� Wetland / Federal Jurisdiction Off Site
� Stream / Creek On Site
� Stream / Creek Off Site
� River On Site
9b. How was the wetland identified?
� River Off Site
� Lake On Site � Regulatory Map
� Lake Off Site � Delineated by Consultant
� Other Type On Site � Delineated by Army Corps of Engineers
� Other Type Off Site � Other (identify)
I n f i 1 t r a t e s n / a
10. Has the surface waterbody(ies) in question 9 been identified as a � yes � No
303 (d) segment in Appendix E of GP-0-20-001?
11. Is this project located in one of the Watersheds identified in
Appendix C of GP-0-20-001? O Yes � No
12. Is the project located in one of the watershed
areas associated with AA and AA-S classified O Yes � No
waters?
If no, skip question 13.
13. Does this construction activity disturb land with no
existing impervious cover and where the Soil Slope Phase is � Yes O No
identified as an E or F on the USDA Soil Survey?
If Yes, what is the acreage to be disturbed?
�'�
14. Will the project disturb soils within a State
regulated wetland or the protected 100 foot adjacent O Yes � No
area?
� Page 4 of 14 �
I 64�3��982� �
15. Does the site runoff enter a separate storm sewer
system (including roadside drains, swales, ditches, � Yes � No O Unknown
culverts, etc) ?
16. What is the name of the municipality/entity that owns the separate storm sewer
system?
n / a
17. Does any runoff from the site enter a sewer classified � yes � No O Unknown
as a Combined Sewer?
18. Will future use of this site be an agricultural property as
defined by the NYS Agriculture and Markets Law? O Yes � No
19. Is this property owned by a state authority, state agency,
federal government or local government? O Yes � No
20. Is this a remediation project being done under a Department
approved work plan? (i.e. CERCLA, RCRA, Voluntary Cleanup � Yes � No
Agreement, etc. )
21. Has the required Erosion and Sediment Control component of the
SWPPP been developed in conformance with the current NYS � Yes O No
Standards and Specifications for Erosion and Sediment Control
(aka Blue Book) ?
22. Does this construction activity require the development of a
SWPPP that includes the post-construction stormwater management
practice component (i.e. Runoff Reduction, Water Quality and � Yes O No
Quantity Control practices/techniques) ?
If No, skip questions 23 and 27-39.
23. Has the post-construction stormwater management practice component
of the SWPPP been developed in conformance with the current NYS � Yes O No
Stormwater Management Design Manual?
� Page 5 of 14 �
I �25���9825 �
24. The Stormwater Pollution Prevention Plan (SWPPP) was prepared by:
� Professional Engineer (P.E.)
O Soil and Water Conservation District (SWCD)
O Registered Landscape Architect (R.L.A)
O Certified Professional in Erosion and Sediment Control (CPESC)
O Owner/Operator
O Other
SWPPP Preparer
V e r i t y E n g i n e e r i n g , D . P . C
Contact Name (Last, Space, First)
V e r a , A a r o n
Mailing Address
P . O . B o x 4 7 4
City
T r o y
State Zip
N Y 1 2 1 8 1 - �
Phone Fax
5 1 8 - 3 8 9 - 7 2 0 0 � - � - �
Email
a a r o n@ v e r i t y e n g . c o m
SWPPP Preparer Certification
I hereby certify that the Stormwater Pollution Prevention Plan (SWPPP) for
this project has been prepared in accordance with the terms and conditions of
the GP-0-20-001. Furthermore, I understand that certifying false, incorrect
or inaccurate information is a violation of this permit and the laws of the
State of New York and could subject me to criminal, civil and/or
administrative proceedings.
First Name MI
A a r o n �
Last Name
V e r a
Signature
Date
m � m � �
� Page 6 of 14 �
I ���5��9822 �
25. Has a construction sequence schedule for the planned management
practices been prepared? � Yes O No
26. Select all of the erosion and sediment control practices that will be
employed on the project site:
Temporary Structural Vegetative Measures
� Check Dams O Brush Matting
O Construction Road Stabilization O Dune Stabilization
� Dust Control O Grassed Waterway
O Earth Dike �Mulching
O Level Spreader O Protecting Vegetation
O Perimeter Dike/Swale O Recreation Area Improvement
O Pipe Slope Drain � Seeding
O Portable Sediment Tank O Sodding
O Rock Dam O Straw/Hay Bale Dike
O Sediment Basin O Streambank Protection
O Sediment Traps O Temporary Swale
� Silt Fence � Topsoiling
� Stabilized Construction Entrance O Vegetating Waterways
� Storm Drain Inlet Protection permanent Structural
O Straw/Hay Bale Dike
O Temporary Access Waterway Crossing O Debris Basin
O Temporary Stormdrain Diversion O Diversion
O Temporary Swale O Grade Stabilization Structure
O Turbidity Curtain � Land Grading
O Water bars O Lined Waterway (Rock)
O Paved Channel (Concrete)
Biotechnical O Paved Flume
O Brush Matting O Retaining Wall
O Wattling O Riprap Slope Protection
� Rock Outlet Protection
Other O Streambank Protection
� Page 7 of 14 �
I ���2��982� �
Post-construction Stormwater Management Practice (SMP) Requirements
Important: Completion of Questions 27-39 is not required
if response to Question 22 is No.
27. Identify all site planning practices that were used to prepare the final site
plan/layout for the project.
O Preservation of Undisturbed Areas
O Preservation of Buffers
�Reduction of Clearing and Grading
O Locating Development in Less Sensitive Areas
O Roadway Reduction
� Sidewalk Reduction
� Driveway Reduction
O Cul-de-sac Reduction
� Building Footprint Reduction
� Parking Reduction
27a. Indicate which of the following soil restoration criteria was used to address the
requirements in Section 5.1. 6 ("Soil Restoration") of the Design Manual
(2010 version) .
� All disturbed areas Will be restored in accordance with the Soil
Restoration requirements in Table 5.3 of the Design Manual (see page 5-22) .
� Compacted areas were considered as impervious cover when calculating the
WQv Required, and the compacted areas were assigned a post-construction
Hydrologic Soil Group (HSG) designation that is one level less permeable
than existing conditions for the hydrology analysis.
28. Provide the total Water Quality Volume (WQv) required for this project (based on
final site plan/layout) .
Total WQv Required
�• 5 2 9 acre-feet
29. Identify the RR techniques (Area Reduction) , RR techniques (Volume Reduction) and
Standard SMPs with RRv Capacity in Table 1 (See Page 9) that were used to reduce
the Total WQv Required(#28) .
Also, provide in Table 1 the total impervious area that contributes runoff to each
technique/practice selected. For the Area Reduction Techniques, provide the total
contributing area (includes pervious area) and, if applicable, the total impervious
area that contributes runoff to the technique/practice.
Note: Redevelopment projects shall use Tables 1 and 2 to identify the SMPs used
to treat and/or reduce the WQv required. If runoff reduction techniques will not
be used to reduce the required WQv, skip to question 33a after identifying the
SMPs.
� Page 8 of 14 �
I 773���9822 Table 1 - Runoff Reduction (RR) Techniques �
and Standard Stormwater Management
Practices (SMPs)
Total Contributing Total Contributing
Area (acres) Impervious Area(acres)
RR Techniques (Area Reduction)
O Conservation of Natural Areas (RR-1) . . . �•� and/or �•�
O Sheetflow to Riparian �.� �.�
Buffers/Filters Strips (RR-2) , , , , , , , , , , and/or
O Tree Planting/Tree Pit (RR-3) , , , , , , , , , , �'� and/or '
O Disconnection of Rooftop Runoff (RR-4) • • �•� and/or
RR Techniques (Volume Reduction)
O Vegetated Swale (RR-5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
O Rain Garden (RR-6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
O Stormwater Planter (RR-7) • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
O Rain Barrel/Cistern (RR-8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
O Porous Pavement (RR-9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
O Green Roof (RR-10) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . �•�
Standard SMPs with RRv Capacity
O Infiltration Trench (2-1) • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
O Infiltration Basin (2-2) • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • . . . . 5 6 3 4
ODry Well (2-3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
O Underground Infiltration System (2-4) • • • • • • • • • • • • • • • • • • • • • • • •
O Bioretention (F-5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
O Dry Swale (O-1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . �'�
Standard SMPs
O Micropool Extended Detention (P-1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . �'�
O Wet Pond (P-2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
O Wet Extended Detention (P-3) • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
O Multiple Pond System (P-4) • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
O Pocket Pond (P-5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
O Surface Sand Filter (F-1) • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
O Underground Sand Filter (F-2) • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
O Perimeter Sand Filter (F-3) • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • �•�
O Organic Filter (F-4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
O Shallow Wetland (W-1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
O Extended Detention Wetland (W-2) , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,
O Pond/Wetland System (W-3) , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,
O Pocket Wetland (W-4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
O Wet Swale (O-2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
� Page 9 of 14 �
I �762��9822 �
Table 2 - Alternative SMPs
(DO NOT INCLUDE PRACTICES BEING
USED FOR PRETREATMENT ONLY)
Total Contributing
Alternative SMP Impervious Area(acres)
O Hydrodynamic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . �•�
OWet Vault . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
O Media Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
O Other . . . . . . . . . . . . . . . . . . �.�
Provide the name and manufacturer of the Alternative SMPs (i.e.
proprietary practice (s) ) being used for WQv treatment.
Name
Manufacturer
Note: Redevelopment projects which do not use RR techniques, shall
use questions 28, 29, 33 and 33a to provide SMPs used, total
WQv required and total WQv provided for the project.
30. Indicate the Total RRv provided by the RR techniques (Area/Volume Reduction) and
Standard SMPs with RRv capacity identified in question 29.
Total RRv provided
�• 5 2 9 acre-feet
31. Is the Total RRv provided (#30) greater than or equal to the
total WQv required (#28) .
� Yes O No
If Yes, go to question 36.
If No, go to question 32.
32. Provide the Minimum RRv required based on HSG.
[Minimum RRv Required = (P) (0. 95) (Ai) /12, Ai=(S) (Aic) ]
Minimum RRv Required
�'�acre-feet
32a. Is the Total RRv provided (#30) greater than or equal to the
Minimum RRv Required (#32) ? O Yes O No
If Yes, go to question 33.
Note: Use the space provided in question #39 to summarize the
specific site limitations and justification for not reducing
1000 of WQv required (#28) . A detailed evaluation of the
specific site limitations and justification for not reducing
1000 of the WQv required (#28) must also be included in the
SWPPP.
If No, sizing criteria has not been met, so NOI can not be
processed. SWPPP preparer must modify design to meet sizing
criteria.
� Page 10 of 14 �
I �766��9827 �
33. Identify the Standard SMPs in Table 1 and, if applicable, the Alternative SMPs in
Table 2 that were used to treat the remaining
total WQv(=Total WQv Required in 28 - Total RRv Provided in 30) .
Also, provide in Table 1 and 2 the total impervious area that contributes runoff
to each practice selected.
Note: Use Tables 1 and 2 to identify the SMPs used on Redevelopment projects.
33a. Indicate the Total WQv provided (i.e. WQv treated) by the SMPs
identified in question #33 and Standard SMPs with RRv Capacity identified
in question 29.
WQv Provided
�'�acre-feet
Note: For the standard SMPs with RRv capacity, the WQv provided by each practice
= the WQv calculated using the contributing drainage area to the practice
- RRv provided by the practice. (See Table 3.5 in Design Manual)
34. Provide the sum of the Total RRv provided (#30) and �'�
the WQv provided (#33a) .
35. Is the sum of the RRv provided (#30) and the WQv provided
(#33a) greater than or equal to the total WQv required (#28) ? O Yes O No
If Yes, go to question 36.
If No, sizing criteria has not been met, so NOI can not be
processed. SWPPP preparer must modify design to meet sizing
criteria.
36. Provide the total Channel Protection Storage Volume (CPv) required and
provided or select waiver (36a) , if applicable.
CPv Required CPv Provided
�'�acre-feet �'�acre-feet
36a. The need to provide channel protection has been waived because:
� Site discharges directly to tidal waters
or a fifth order or larger stream.
� Reduction of the total CPv is achieved on site
through runoff reduction techniques or infiltration systems.
37. Provide the Overbank Flood (Qp) and Extreme Flood (Qf) control criteria or
select waiver (37a) , if applicable.
Total Overbank Flood Control Criteria (Qp)
Pre-Development Post-development
�, O O O CFS �, O O O CFS
Total Extreme Flood Control Criteria (Qf)
Pre-Development Post-development
�, O O O CFS �, O O O CFS
� Page 11 of 14 �
I �3����9822 �
37a. The need to meet the Qp and Qf criteria has been waived because:
� Site discharges directly to tidal waters
or a fifth order or larger stream.
� Downstream analysis reveals that the Qp and Qf
controls are not required
38. Has a long term Operation and Maintenance Plan for the
post-construction stormwater management practice (s) been � Yes O No
developed?
If Yes, Identify the entity responsible for the long term
Operation and Maintenance
U n i t e d A g & T u r f N o r t h e a s t
39. Use this space to summarize the specific site limitations and justification
for not reducing 1000 of WQv required(#28) . (See question 32a)
This space can also be used for other pertinent project information.
� Page 12 of 14 �
I 42�5��9826 �
40. Identify other DEC permits, existing and new, that are required for this
project/facility.
O Air Pollution Control
� Coastal Erosion
� Hazardous Waste
� Long Island Wells
� Mined Land Reclamation
� Solid Waste
O Navigable Waters Protection / Article 15
� Water Quality Certificate
� Dam Safety
� Water Supply
� Freshwater Wetlands/Article 24
O Tidal Wetlands
� Wild, Scenic and Recreational Rivers
� Stream Bed or Bank Protection / Article 15
� Endangered or Threatened Species (Incidental Take Permit)
� Individual SPDES
� SPDES Multi-Sector GP N Y R
� Other
� None
41. Does this project require a US Army Corps of Engineers
Wetland Permit? .❑ O Yes � No
If Yes, Indicate Size of Impact.
42. Is this project subject to the requirements of a regulated,
traditional land use control MS4? � Yes O No
(If No, skip question 43)
43. Has the "MS4 SWPPP Acceptance" form been signed by the principal
executive officer or ranking elected official and submitted along � Yes O No
with this NOI?
44. If this NOI is being submitted for the purpose of continuing or transferring
coverage under a general permit for stormwater runoff from construction
activities, please indicate the former SPDES number assigned. N Y R
� Page 13 of 14 �
I 3547��9826 �
Owner/Operator Certification
I have read or been advised of the permit conditions and believe that I understand them. I also
understand that, under the terms of the permit, there may be reporting requirements. I hereby certify
that this document and the corresponding documents were prepared under my direction or supervision. I am
aware that there are significant penalties for submitting false information, including the possibility of
fine and imprisonment for knowing violations. I further understand that coverage under the general permit
will be identified in the acknowledgment that I will receive as a result of submitting this NOI and can
be as long as sixty (60) business days as provided for in the general permit. I also understand that, by
submitting this NOI, I am acknowledging that the SWPPP has been developed and will be implemented as the
first element of construction, and agreeing to comply with all the terms and conditions of the general
permit for which this NOI is being submitted.
Print First Name MI
D a v e �
Print Last Name
H a m m o n d
Owner/Operator Signature
Date
m � m � �
� Page 14 of 14 �
Appendix C
MS4 Acceptance Form
Stormwater Pollution Prevention Plan (SWPPP) C
26 Freedom Way February 2021
�E�+ar���� D�p�rtment c�f
�TATF[l F
C)PPG1F2717r�17Y ���1►��O�L�I'1�R�G'��
�O T�S�f'1���1 O�'1
NYS Department of Environmental Conservation
Division of Water
625 Broadway, 4th Floor
Albany, New York 12233-3505
MS4 Stormwater Pollution Prevention Plan (SWPPP) Acceptance
Form
for
Construction Activities Seeking Authorization Under SPDES General Permit
*(NOTE: Attach Completed Form to Notice Of Intent and Submit to Address Above)
I. Project Owner/Operator Information
1. Owner/Operator Name: Agl'OChe11"1, InC.
2. Contact Person: ROb@i� D@MarCO
s. street aaaress: 26 Freedom Way
4. c�tyistateiz�p: Saratoga Springs, NY 12866
II. Project Site Information
5. Pro�ectis�te Name: AgroChem Building Addition
6. Street Address: 26 FreedOm Way
�. c�tyistateiz�p: Saratoga Springs, NY 12866
III. Stormwater Pollution Prevention Plan (SWPPP) Review and Acceptance Information
8. SWPPP Reviewed by:
9. Title/Position:
10. Date Final SWPPP Reviewed and Accepted:
IV. Regulated MS4 Information
11. Name of MS4:
12. MS4 SPDES Permit Identification Number: NYR20A
13. Contact Person:
14. Street Address:
15. City/State/Zip:
16. Telephone Number:
Page 1 of 2
MS4 SWPPP Acceptance Form - continued
V. Certification Statement - MS4 Official (principal executive officer or ranking elected official) or
Duly Authorized Representative
I hereby certify that the final Stormwater Pollution Prevention Plan (SWPPP) for the construction project
identified in question 5 has been reviewed and meets the substantive requirements in the SPDES
General Permit For Stormwater Discharges from Municipal Separate Storm Sewer Systems (MS4s).
Note: The MS4, through the acceptance of the SWPPP, assumes no responsibility for the accuracy and
adequacy of the design included in the SWPPP. In addition, review and acceptance of the SWPPP by
the MS4 does not relieve the owner/operator or their SWPPP preparer of responsibility or liability for
errors or omissions in the plan.
Printed Name:
Title/Position:
Signature:
Date:
VI.Additional Information
(NYS DEC - MS4 SWPPP Acceptance Form -January 2015)
Page 2 of 2
Appendix D
SPDES General Permit GP-0-20-001
Stormwater Pollution Prevention Plan (SWPPP) D
26 Freedom Way February 2021
NEWYCiR.K ❑epartrnent of PREFACE
STnSF df
qYPURiuwfr Ef1V6YOflf7"IEf1tdl
ConservaYion
Pursuant to Section 402 of the Clean Water Act("CWA"),stormwater discharges
from certain conshuc[ion ac[ivi[ies are unlawful unless they are authorized by a Na[ional
NEVJ YORK STA7E Pollu[an[Discharge Elimina[ion Sys[em(`NPDES")permit or by a state permit program.
QEPARTMENT�F ENVIRONMEN7AL CONSERVATIOM NewYork administers the approved State Pollutant Discharge Elimination System
(SPDES)program with permits issued in accordance with the New York State
3POE5 GENERAL PERMIT Environmental Conservation Law(ECL)Article 17,Titles 7,8 and Article 70.
FDR STO�RMVJATER�CSCHARGCS
From An owner oropera[or of a conshuc[ion ac[ivirythat is eligible for coverage under
this permit must obtain coverage prior to the commencemen[of cons[ruc[ion ac[iviry.
CONSTRl1CTIbN ACTIVITY Activities that fit the definition of"conshuc[ion ac[iviQi',as defined under 40 CFR
12226(b)(14)(x),(15)(i),and(15)(ii),constitute construction of a poin[source and
Permd No.Gp-0-26-�a1 therefore,pursuantto ECL section 17-0505 and 17-0701,the owneroropera[ormust
have coverage under a SPDES permit prior to commencing conshuc[ion ac[iviry.The
Issued Pursuand to Article 97,Titles 7.8 anrJ Art:cle 7C owner oropera[or cannot wait until there is an actual discharge from the conshuc[ion si[e
oRhe Env�rp�:meirat Co��serva;�an Law to obtain permit coverage.
*Note:The italicized words/phrases within this permit are defined in Appendix A.
EHective C7ate:J'�anuary 29,2020 Expiration C7ate:January 28,2025
Jphn J.FergusOn
ChieT Permit Administratnr
,-..,
( �
` ;` .v- —. �� , _... - ' 7'_: 7 G
..�� • -
�dulhorixed Signalure �� Qale
Address�. MYS DfC
o;vision of Envirpr�menta�Permits
625 13rc�adway,4tM1 F'loar
Albany,N.Y 12233-175d
NEW YORK STATE DEPARTMENT OF ENVIRONMENTAL CONSERVATION K. Requirement to Obtain Coverage Under an Alternative Permit...........................35
SPDES GENERAL PERMIT FOR STORMWATER DISCHARGES FROM L. Proper Operation and Maintenance....................................................................36
CONSTRUCTION ACTIVITIES M. Inspection and Entry...........................................................................................36
N. PermitActions.....................................................................................................37
Table of Contents o. oefinitions...........................................................................................................37
P. Re-OpenerClause..............................................................................................37
Part 1.PERMIT COVERAGE AND LIMITATIONS.............................................................1 Q� Penalties for Falsification of Forms and Reports.................................................37
A. PermitApplication.................. R. OtherPermits......................................................................................................38
...............................................................................1
B. EffluentLimitationsApplicabletoDischargesfromConstructionActivities...........1 APPENDIXA—AcronymsandDefinitions.......................................................................39
C. Post-construction Stormwater Management Practice Requirements....................4 Acronyms......................................................................................................................39
D. Maintainin WaterQuali Definitions.....................................................................................................................40
9 tY.....................................................................................8 APPENDIX B—Required SWPPP Components by Project Type....................................48
E. Eligibility UnderThis General Permit.....................................................................9
F. Activities Which Are Ineligible for Coverage UnderThis General Permit..............9 Table 1..........................................................................................................................48
Table2..........................................................................................................................50
Part II.PERMIT COVERAGE...........................................................................................12 APPENDIX C—Watersheds Requiring Enhanced Phosphorus Removal........................52
A. How to Obtain Coverage.....................................................................................12 APPENDIX D—Watersheds with Lower Disturbance Threshold.....................................58
B. Notice of Intent(NOI)Submittal..........................................................................13 APPENDIX E—303(d)Segments Impaired by Construction Related Pollutant(s)...........59
C. PermitAuthorization............................................................................................13 APPENDIXF—ListofNYSDECRegionalOffices..........................................................65
D. General Requirements For Owners or Operators With Permit Coverage...........15
E. Permit Coverage for Discharges Authorized Under GP-0-15-002.......................17
F. Change of Owner or Operator.............................................................................17
Part III.STORMWATER POLLUTION PREVENTION PLAN(SWPPP)...........................18
A. General SWPPP Requiremerds..........................................................................18
B. Required SWPPP Contents................................................................................20
C. Required SWPPP Components by Project Type.................................................24
Part IV.INSPECTION AND MAINTENANCE REQUIREMENTS.....................................24
A. General Construction Site Inspection and Maintenance Requirements..............24
B. Contractor Maintenance Inspection Requirements.............................................24
C. Qualrfied Inspector Inspection Requirements......................................................25
Part V.TERMINATION OF PERMIT COVERAGE...........................................................29
A. Termination of Permit Coverage.........................................................................29
Part VI.REPORTING AND RETENTION RECORDS......................................................31
A. Record Retention................................................................................................31
B. Addresses...........................................................................................................31
Part VII.STANDARD PERMIT CONDITIONS..................................................................31
A. Duty to Comply....................................................................................................31
B. Continuation of the F�cpired General Permit........................................................32
C. Enforcement........................................................................................................32
D. Need to Halt or Reduce Activity Not a Defense...................................................32
E. Duty to Mitigate...................................................................................................33
F. Duty to Provide Information.................................................................................33
G. Other I nfo rmation................................................................................................33
H. Signatory Requirements......................................................................................33
I. Property Rights...................................................................................................35
J. Severability..........................................................................................................35
(Parc i)
Part 1.PERMIT COVERAGE AND LIMITATIONS (��rc�B��
deviation or alternative design and provide iriformation which demonstrates that
A. Permit Application the deviation or alternative design is equivalen[to the technical standard.
This permit authorizes stormwater discharges to surtace wa[ers of[he S[a[e from a. Erosion and Sediment Controls.Design,install and maintain effective
the following conshuc[ion ac[ivi[ies identified within 40 CFR Parts 122.26(b)(14)(x), erosion and sediment controls to minimize the discharge of pollu[an[s and
122.26(b)(15)(i)and 122.26(b)(15)(ii),provided all of the eligibility provisions of this prevent a violation of the wa[erqualiry s[andards.At a minimum,such
permit are met: controls must be designed,installed and maintained to:
1. Cons[ruc[ion ac[ivi[ies involving soil disturbances of one(1)or more acres; (i) Minimize soil erosion through application of runoff control and soil
including disturbances of less than one acre that are part of a largercommon stabilization control measure to minimize pollu[an[discharges;
plan of developmen[orsale that will ultimately disturb one or more acres of
land;excluding rou[ine main[enance ac[ivitythat is pertormed to maintain the (ii) Control stormwater discharges,including both peak flowrates and total
original line and grade,hydraulic capacity or original purpose of a facility; stormwater volume,to minimize channel and sheambank erosion and
scour in the immediate vicinity of the discharge points;
2. Cons[ruc[ion ac[ivi[ies involving soil disturbances of less than one(1)acre
where the Department has determined that a SPDES permit is required for (iii) Minimize the amount of soil exposed during conshuc[ion ac[iviry;
stormwater discharges based on the potential for contribution to a violation of a
wa[erqualiry s[andard or for significant contribution of pollu[an[s to surtace (iv) Minimize the disturbance of s[eep slopes;
wa[ers of[he S[a[e.
(v) Minimize sediment discharges from the site;
3. Cons[ruc[ion ac[ivi[ies located in the watershed(s)identified in Appendix D that
involve soil disturbances between five thousand(5,000)square feet and one (vi) Provide and maintain na[ural buffers around surface waters,direct
(1)acre of land. stormwaterto vegetated areas and maximize stormwater infiltration to
reduce pollu[an[discharges,unless infeasible;
B. Effluent Limitations Applicable to Discharges from Construction Activities (vii) Minimize soil compaction.Minimizing soil compaction is not required
where the intended function of a specific area of the site dictates that it
Discharges authorized by this permit must achieve, at a minimum, the effluent be compacted;
limitations in Part I.B.1.(a)—(�of this permit.These limitations representthe degree of
effluent reduction attainable by the application of best practicable technology currently (viii)Unless infeasible,preserve a sufficient amount of topsoil to complete
available. soil restoration and establish a uniform,dense vegetative cover;and
1. Erosion and Sediment Control Requirements-The owner oropera[or must
select,design,install,implement and maintain control measures to minimize (ix) Minimize dust.On areas of exposed soil,minimize dust through the
the discharge of pollu[an[s and prevent a violation of the wa[erqualdy appropriate application of water or other dust suppression techniques
s[andards.The selection,design,installation,implementation,and to control the generation of pollutants that could be discharged from
maintenance of these control measures must meet the non-numeric effluent the site.
limitations in Part I.B.1.(a)—(f)of this permit and be in accordance with the
New York State Standards and Specifications for Erosion and Sediment b. Soil Stabilization.In areas where soil disturbance activity has temporarily
Control,dated November 2016,using sound engineering judgment.Where or permanently ceased,the application of soil stabilization measures must
control measures are not designed in conformance with the design criteria be initiated by the end of the next business day and completed within
included in the technical standard,the owneror opera[or must include in the fourteen(14)days from the date the current soil disturbance activity ceased.
S[ormwa[er Pollu[ion Preven[ion Plan("SWPPP")the reason(s)for the For construction sites that direc[ly discharge to one of the 303(d)segments
1 2
(Parc i e.�e) (Parc i e�e i�ii)
listed in Appendix E or is located in one of the watersheds listed in (iii) Fuels,oils,or other pollu[an[s used in vehicle and equipment operation
Appendix C,the application of soil stabilization measures must be initiated and maintenance;
by the end of the next business day and completed within seven(7)days
from the date the current soil disturbance activity ceased.See Appendix A (iv) Soaps or solvents used in vehicle and equipment washing;and
for definition of Temporarily Ceased.
(v) Toxic or hazardous substances from a spill or other release.
c. Dewatering.Discharges from dewa[ering activities,including discharges
from dewa[ering of trenches and excavations,must be managed by f. Surtace Outlets.When discharging from basins and impoundments,the
appropriate control measures. outlets shall be designed,constructed and maintained in such a manner
that sediment does not leave the basin or impoundment and that erosion at
d. Pollution Prevention Measures.Design,install,implement,and maintain or belowthe outlet does not occur.
effective pollution prevention measures to minimize the discharge of C. Post-construction Stormwater Management Practice Requirements
pollu[an[s and prevent a violation of the wa[erquality s[andards.At a
minimum,such measures must be designed,installed,implemented and 1. The owner oropera[orof a conshuc[ion ac[ivirythat requires post-construction
maintained to: stormwater management practices pursuarit to Part III.C.of this permit must
select,design,install,and maintain the practices to meet the pertormance
(i) Minimize the discharge of pollu[an[s from equipment and vehicle cri[eria in the New York State Stormwater Management Design Manual
washing,wheel wash water,and other wash waters.This applies to ("Design Manual"),dated January 2015,using sound engineering judgment.
washing operations that use clean water only.Soaps,detergents and Where post-construction stormwater management practices("SMPs")are not
solvents cannot be used; designed in conformance with the pertormance cri[eria in the Design Manual,
the owner oropera[or must include in the SWPPP the reason(s)for the
(ii) Minimize the exposure of building materials,building products, deviation or alternative design and provide iriformation which demonstrates that
construction wastes,trash,landscape materials,fertilizers,pesticides, the deviation or alternative design is equivalen[to the technical standard.
herbicides,detergents,sanitary waste,hazardous and toxic waste,and
other materials present on the site to precipitation and to stormwater. 2. The owner oropera[orof a conshuc[ion ac[ivirythat requires post-construction
Minimization of exposure is not required in cases where the exposure stormwater management practices pursuarit to Part III.C.of this permit must
to precipitation and to stormwater will not result in a discharge of design the practices to meet the applicable sizing cri[eria in Part I.C.2.a.,b.,c.
pollu[an[s,or where exposure of a specific material or product poses or d.of this permit.
little risk of stormwater contamination(such as final products and
materials intended for outdoor use);and a. Sizing Criteria for New Development
(iii) Prevent the discharge of pollu[an[s from spills and leaks and (i) Runoff Reduction Volume("RRd'): Reduce the total Water Quality
implement chemical spill and leak prevention and response Volume("WQv")by application of RR techniques and standard SMPs
procedures. with RRv capacity.The total WQv shall be calculated in accordance
with the criteria in Section 42 of the Design Manual.
e. Prohibited Discharges.The following discharges are prohibited:
(ii) Minimum RRv and Treatment of Remaining Total WQv:Construction
(i) Wastewater from washout of concrete; activities that cannot meet the criteria in Part I.C.2.a.(i)of this permit
due to site limitations shall direct runoff from all newly constructed
(ii) Wastewater from washout and cleanout of stucco,paint,form release impervious areas to a RR technique or standard SMP with RRv
oils,curing compounds and other construction materials; capacity unless infeasible.The specific site limitations that prevent the
reduction of 100%of the WQv shall be documented in the SWPPP.
3 4
(Parc i.cza.�ii) (Parc i c z e i)
For each impervious area that is not directed to a RR technique or calculated in accordance with the criteria in Section 10.3 of the Design
standard SMP with RRv capacity,the SWPPP must include Manual.
documentation which demonstrates that all options were considered
and for each option explains why it is considered infeasible. (ii) Minimum RRv and Treatment of Remaining Total WQv:Conshuc[ion
In no case shall the runoff reduction achieved from the newly ac[ivi[ies that cannot meet the criteria in Part I.C2.b.(i)of this permit
constructed impervious areas be less than the Minimum RRv as due to si[e limi[a[ions shall direct runoff from all newly constructed
calculated using the criteria in Section 4.3 of the Design Manual. impervious areas to a RR technique or standard SMP with RRv
The remaining portion of the total WQv that cannot be reduced shall be capacity unless infeasible.The specific si[e limi[a[ions that prevent the
treated by application of standard SMPs. reduction of 100%of the WQv shall be documented in the SWPPP.
For each impervious area that is not directed to a RR technique or
(iii) Channel Protection Volume("Cpv"):Provide 24 hour extended standard SMP with RRv capacity,the SWPPP must include
detention of the post-developed 1-year,24-hour storm event; documentation which demonstrates that all options were considered
remaining after runoff reduction.The Cpv requirement does not apply and for each option explains why it is considered infeasible.
when: In no case shall the runoff reduction achieved from the newly
(1)Reduction of the entire Cpv is achieved by application of runoff constructed impervious areas be less than the Minimum RRv as
reduction techniques or infiltration systems,or calculated using the criteria in Section 10.3 of the Design Manual.
(2)The site discharges directly to tidal waters,or fifth order or larger The remaining portion of the total WQv that cannot be reduced shall be
streams. treated by application of standard SMPs.
(iv) Overbank Flood Control Cnteria("Qp"):Requires storage to attenuate (iii) Channel Protection Volume(Cpv):Provide 24 hour extended detention
the post-development 10-year,24-hour peak discharge rate(Qp)to of the post-developed 1-year,24-hour storm event;remaining after
predevelopment rates.The Qp requirement does not apply when: runoff reduction.The Cpv requirement does not apply when:
(1)the site discharges directly to tidal waters or fifth order or larger (1)Reduction of the entire Cpv is achieved by application of runoff
streams,or reduction techniques or infiltration systems,or
(2)A downstream analysis reveals that overbank control is not (2)The site discharges directly to tidal waters,or fifth order or larger
required. streams.
(v) Extreme Flood Control Criteria("QP'):Requires storage to attenuate (iv) Overbank Flood Control Criteria(Qp):Requires storage to attenuate
the post-development 100-year,24-hour peak discharge rate(Qf)to the post-development 10-year,24-hour peak discharge rate(Qp)to
predevelopment rates.The Qf requirement does not apply when: predevelopment rates.The Qp requirement does not apply when:
(1)the site discharges directly to tidal waters or fifth order or larger (1)the site discharges directly to tidal waters or fifth order or larger
streams,or streams,or
(2)A downstream analysis reveals that overbank control is not (2)A downstream analysis reveals that overbank control is not
required. required.
b. Sizing Criteria for New Development in Enhanced Phosphorus (v) Extreme Flood Control Criteria(Qf):Requires storage to attenuate the
Removal Watershed post-development 100-year,24-hour peak discharge rate(Qf)to
predevelopment rates.The Qf requirement does not apply when:
(i) Runoff Reduction Volume(RRv): Reduce the total Water Quality (1)the site discharges directly to tidal waters or fifth order or larger
Volume(WQv)by application of RR techniques and standard SMPs streams,or
with RRv capacity.The total WQv is the runoff volume from the 1-year, (2)A downstream analysis reveals that overbank control is not
24 hour design storm over the post-developed watershed and shall be required.
5 6
(Pam czq (Pam czd)
c. Sizing Criteria for Redevelopment Activity d. Sizing Criteria for Combination of Redevelopment Activity and New
Development
(i) Water Quality Volume(WQv):The WQv treatment objective for Construction projects that include both New Development and Redevelopment
redevelopmen[ac[iviry shall be addressed by one of the following Activity shall provide post-construction stormwater management controls that
options.Redevelopmen[ac[ivi[ies located in an Enhanced Phosphorus
Removal Watershed(see Part I II.B.3.and Appendix C of this permit) meet the sizing criteria calculated as an aggregate of the Sizing Criteria in Part
shall calculate the WQv in accordance with Section 10.3 of the Design I.C.2.a.or b.of this permit for the New Development portion of the project and
Manual.All other redevelopmen[ac[ivi[ies shall calculate the WQv in Part I.C2.c of this permit for Redevelopment Activity portion of the project.
accordance with Section 4.2 of the Design Manual.
(1)Reduce the existing impervious cover by a minimum of 25%of the D. Maintaining Water Quality
total disturbed, impervious area. The Soil Restoration criteria in
Section 5.1.6 of the Design Manual must be applied to all newly The Department expects that compliance with the conditions of this permit will control
created pervious areas,or discharges necessary to meet applicable wa[erqualiry s[andards.It shall be a violation
(2)Capture and treat a minimum of 25%of the WQv from the disturbed, of the ECL for any discharge to either cause or contribute to a violation of wa[erqualiry
impervious area by the application of standard SMPs;or reduce 25% s[andards as contained in Parts 700 through 705 of Title 6 of the Official Compilation of
of the WQv from the disturbed,impervious area by the application of Codes,Rules and Regulations of the State of New York,such as:
RR techniques or standard SMPs with RRv capacity.,or
(3)Capture and treat a minimum of 75%of the WQv from the disturbed, 1. There shall be no increase in turbidity thatwill cause a substantial visible contrast
impervious area as well as any additional runoff from tributary areas to natural conditions;
by application of the alternative practices discussed in Sections 9.3
and 9.4 of the Design Manual.,or 2. There shall be no increase in suspended,colloidal or settleable solids that will
(4)Application of a combination of 1,2 and 3 above that provide a cause deposition or impair the waters for their best usages;and
weighted average of at least two of the above methods.Application
of this method shall be in accordance with the criteria in Section
92.1(B)(IV)of the Design Manual. 3. There shall be no residue from oil and floating substances,nor visible oil film,nor
globules of grease.
If there is an existing post-construction stormwater management
practice located on the site that captures and treats runoff from the If there is evidence indicating that the stormwater discharges authorized by this permit
impervious a2a that is being disturbed, the WQv treatment option are causing,have the reasonable potential to cause,or are contributing to a violation of
selected must,at a minimum,provide treatment equal to the treatment the wa[er quality s[andards;the owner or opera[or must take appropriate corrective
that was being provided by the existing practice(s)if that treatment is action in accordance with Part IV.C.5. of this general permit and document in
greater than the treatment required by options 1—4 above. accordance with Part IV.C.4. of this general permit. To address the wa[er quality
s[andard violation the owner or opera[or may need to provide additional information,
(ii) Channel Protection Volume(Cpv): Not required if there are no include and implement appropriate controls in the SWPPP to correct the problem,or
changes to hydrology that increase the discharge rate from the project obtain an individual SPDES permit.
site. If there is evidence indicating that despite compliance with the terms and conditions of
this general permit it is demonstrated thatthe stormwater discharges authorized by this
(iii) Overbank Flood Control Criteria(Qp):Not required if there are no permit are causing or contributing to a violation of wa[er quality s[andards,or if the
changes to hydrology that increase the discharge rate from the project Department determines that a modification of the permit is necessary to prevent a
site. violation of wa[erqualiry s[andards,the authorized discharges will no longer be eligible
for coverage under this permit. The Department may require the owner or opera[orto
(iv) Extreme Flood Control Criteria(Qf):Not required if there are no obtain an individual SPDES permit to continue discharging.
changes to hydrology that increase the discharge rate from the project
site
7 8
(Parc i E) (Parc i F a)
E. Eligibility Under This General Permit opera[or has obtained a permit issued pursuant to 6 NYCRR Part 182 for the
project or the Department has issued a letter of non-jurisdiction for the project.
1. This permit may authorize all discharges of stormwater from conshuc[ion All documentation necessary to demonstrate eligibility shall be maintained on
ac[iviry to surtace wa[ers of[he S[a[e and groundwa[ers except for ineligible site in accordance with Part II.D2 of this permit;
discharges identified under subparagraph F.of this Part.
5. Discharges which either cause or contribute to a violation of wa[erqualiry
2. Except for non-stormwater discharges explicitly listed in the next paragraph, s[andards adopted pursuant to the ECL and its accompanying regulations;
this permit only authorizes stormwater discharges;including stormwater runoff,
snowmelt runoff,and surtace runoff and drainage,from conshuc[ion ac[ivi[ies. 6. Cons[ruc[ion ac[ivi[ies for residential,commercial and institutional projects:
3. Notwithstanding paragraphs E.1 and E2 above,the following non-stormwater a. Where the discharges from the conshuc[ion ac[ivi[ies are tributary to waters
discharges are authorized by this permit: those listed in 6 NYCRR 750- of the state classified as AA or AA-s;and
12(a)(29)(vi),with the following exception:"Discharges from firefighting
activities are authorized only when the firefighting activities are b. Which are undertaken on land with no existing impervious cover,and
emergencies/unplanned";waters to which other components have not been
added that are used to control dust in accordance with the SWPPP;and c. Which disturb one(1)or more acres of land designated on the current
uncontaminated discharges from conshuc[ion si[e de-watering operations.All United States Department of Agriculture("USDA")Soil Survey as Soil
non-stormwater discharges must be identified in the SWPPP. Under all Slope Phase"D",(provided the map unit name is inclusive of slopes greater
circumstances,the owner oropera[or must still comply with wa[erqualiry than 25%),or Soil Slope Phase"E"or"F"(regardless of the map unit
s[andards in Part I.D of this permit. name),or a combination of the three designations.
4. The owner oropera[ormust maintain permit eligibility to discharge under this 7. Cons[ruc[ion ac[ivi[ies for linear transportation projects and linear utility
permit. Any discharges that are not compliant with the eligibility conditions of projects:
this permit are not authorized by the permit and the owner oropera[or must
either apply for a separate permit to cover those ineligible discharges or take a. Where the discharges from the conshuc[ion ac[ivi[ies are tributary to waters
steps necessary to make the discharge eligible for coverage. of the state classified as AA or AA-s;and
F. Activities Which Are Ineligible for Coverage Under This General Permit
b. Which are undertaken on land with no existing impervious cover,and
All of the following are not authorized by this permit:
1. Discharges after conshuc[ion ac[ivi[ies have been completed and the site has c.Which disturb two(2)or more acres of land designated on the current USDA
undergone final s[abiliza[ion; Soil Survey as Soil Slope Phase"D"(provided the map unit name is inclusive of
slopes greater than 25%),or Soil Slope Phase"E"or"F"(regardless of the map
2. Discharges that are mbced with sources of non-stormwater other than those unit name),or a combination of the three designations.
expressly authorized under subsection E.3.of this Part and identified in the
SWPPP required by this permit;
3. Discharges that are required to obtain an individual SPDES permit or another
SPDES general permit pursuant to Part VII.K.of this permit;
4. Cons[ruc[ion ac[ivi[ies or discharges from cons[ruc[ion ac[ivi[ies that may
adversely affect an endangered or[hrea[ened species unless the owner or
9 10
(Parc i F.a) (Parc i F.a c)
8. Cons[ruc[ion ac[ivi[ies that have the potential to affect an his[oric property, (i) No Affect
unless there is documentation that such impacts have been resolved.The (ii) No Adverse Affect
following documentation necessary to demonstrate eligibility with this (iii) Executed Memorandum of Agreement,or
requirement shall be maintained on site in accordance with Part II.D.2 of this
permit and made available to the Department in accordance with Part VII.F of d. Documentation that:
this permit:
(i) SHPA Section 14.09 has been completed by NYS DEC or another state
a. Documentation that the conshuc[ion ac[iviry is not within an archeologically agency.
sensitive area indicated on the sensitivity map,and that the conshuc[ion
ac[iviry is not located on or immediately adjacent to a property listed or 9. Discharges from conshuc[ion ac[ivi[ies that are subject to an existing SPDES
determined to be eligible for listing on the National or State Registers of individual or general permit where a SPDES permit for conshuc[ion ac[iviry has
Historic Places,and that there is no new permanent building on the been terminated or denied;or where the owner oropera[or has failed to renew
conshuc[ion si[e within the following distances from a building,structure,or an expired individual permit.
object that is more than 50 years old,or if there is such a new permanent
building on the conshuc[ion si[e within those parameters that NYS Office of part II.PERMIT COVERAGE
Parks,Recreation and Historic Preservation(OPRHP),a Historic
Preservation Commission of a Certified Local Government,or a qualified A. How to Obtain Coverage
preservation professional has determined thatthe building,structure,or
object more than 50 years old is not historically/archeologically significant. 1. An owner oropera[orof a conshuc[ion ac[iviry that is not subject to the
requirements of a regulated,traditional land use control MS4 must first prepare
• 1-5 acres of disturbance-20 feet a SWPPP in accordance with all applicable requirements of this permit and
• 5-20 acres of disturbance-50 feet then submit a completed Notice of Intent(NOI)to the Department to be
• 20+acres of disturbance-100 feet,or authorized to discharge under this permit.
b. DEC consultation form sent to OPRHP,and copied to the NYS DEC Agency 2. An owner oropera[orof a conshuc[ion ac[iviry that is subject to the
Historic Preservation Officer(APO),and requirements of a regula[ed,[radi[ionalland use con[rol MS4 must first prepare
(i) the State Environmental Quality Review(SEQR)Environmental a SWPPP in accordance with all applicable requirements of this permit and
Assessment Form(EAF)with a negative declaration or the Findings then have the SWPPP reviewed and accepted by the regula[ed,hadi[ional land
Statement,with documentation of OPRHP's agreement with the use con[rol MS4 prior to submitting the NOI to the Department.The owner or
resolution;or opera[or shall have the"MS4 SWPPP Acceptance"form signed in accordance
(ii) documentation from OPRHP that the conshuc[ion ac[iviry will result in with Part VII.H.,and then submit that form along with a completed NOI to the
No Impact;or Department.
(iii) documentation from OPRHP providing a determination of No Adverse
Impact;or 3. The requirementfor an owneroropera[orto have its SWPPP reviewed and
(iv) a Letter of Resolution signed by the owner/operator,OPRHP and the accepted by the regula[ed,hadi[ionalland use con[rol MS4 prior to submitting
DEC APO which allows for this conshuc[ion ac[iviry to be eligible for the NOI to the Department does not apply to an owner oropera[orthat is
coverage under the general permit in terms of the State Historic obtaining permit coverage in accordance with the requirements in Part II.F.
Preservation Act(SH PA);or (Change of Owner or Opera[or)or where the owner or opera[or of the
conshuc[ion ac[ivity is the regula[ed,hadi[ional land use con[rol MS4. This
c. Documentation of satisfactory compliance with Section 106 of the National exemption does not apply to conshuc[ion ac[ivi[ies subject to the New York City
Historic Preservation Act for a coterminous project area: Administrative Code.
11 12
(Parc u e) (Parc u cz e)
B. Notice of Intent(NOI)Submittal must submit a preliminary SWPPP to the appropriate DEC Permit
Administrator at the Regional Office listed in Appendix F at the time all other
1. Prior to December 21,2020,an owner or operator shall use either the necessary UPA permit applications are submitted.The preliminary SWPPP
electronic(eN01)or paper version of the NOI that the Department prepared. must include sufficient information to demonstrate that the conshuc[ion
Both versions of the NOI are located on the Departmenfs website ac[iviry qualifies for authorization under this permit,
(http://www.dec.ny.gov/).The paper version of the NOI shall be signed in
accordance with Part VII.H.of this permit and submitted to the following c. the final SWPPP has been prepared,and
address:
d. a complete NOI has been submitted to the Department in accordance with
NOTICE OF INTENT the requirements of this permit.
NYS DEC,Bureau of Water Permits
625 Broadway,4�^Floor 3. An owneroropera[orthat has satisfied the requirements of Part II.C.2 above
Albany,New York 12233-3505 will be authorized to discharge stormwater from their conshuc[ion ac[iviry in
2. Beginning December 21.2020 and in accordance with EPA's 2015 NPDES accordance with the following schedule:
Electronic Reporting Rule(40 CFR Part 127),the owneroropera[or must submit a. For conshuc[ion ac[ivi[ies that are not subject to the requirements of a
the NOI electronically using the Departmen['s online NOI.
regula[ed,[radi[ional land use conhol MS4:
3. The owner or opera[or shall have the SWPPP preparer sign the "SWPPP
Preparer Certification"statement on the NOI prior to submitting the form to the (i) Five(5)business days from the date the Department receives a
Department. complete electronic version of the NOI(eN01)for conshuc[ion ac[ivi[ies
with a SWPPP that has been prepared in conformance with the design
4. As of the date the NOI is submitted to the Department,the owner or opera[or criteria in the technical standard referenced in Part III.B.1 and the
shall make the NOI and SWPPP available for review and copying in accordance pertormance cri[eria in the technical standard referenced in Parts III.B.,
with the requirements in Part VII.F.of this permit. 2 or 3,for conshuc[ion ac[ivi[ies that require post-construction
stormwater management practices pursuant to Part III.C.;or
C. Permit Authorization
(ii) Sixty(60)business days from the date the Department receives a
1. An owner oropera[orshall not commence cons[ruc[ion ac[ivity until their complete NOI(electronic or paper version)for conshuc[ion ac[ivi[ies
authorization to discharge under this permit goes into effect. with a SWPPP that has not been prepared in conformance with the
design criteria in technical standard referenced in Part III.B.1.or,for
2. Authorization to discharge under this permit will be effective when the owner or conshuc[ion ac[ivi[ies that require post-construction stormwater
opera[or has satisfied all of the following criteria: management practices pursuant to Part II I.C.,the pertormance cri[eria
in the technical standard referenced in Parts III.B.,2 or 3,or;
a. project review pursuant to the State Environmental Quality Review Act
("SEQRA")have been satisfed,when SEQRA is applicable.See the (iii) Ten(10)business days from the date the Department receives a
Departmenfs website(http:/Nw�nN.dec.nv.aov/)for more information, complete paper version of the NOI for conshuc[ion ac[ivi[ies with a
SWPPP that has been prepared in conformance with the design
b. where required,all necessary Department permits subject to the Uniform criteria in the technical standard referenced in Part III.B.1 and the
Procedu2s Ad(`UPA")(see 6 NYCRR Part 621),or the equivalent from pertormance cri[eria in the technical standard referenced in Parts III.B.,
another New York State agency,have been obtained,unless otherwise 2 or 3,for conshuc[ion ac[ivi[ies that require post-construction
notified by the Department pursuant to 6 NYCRR 621.3(a)(4).Owners or stormwater management practices pursuant to Part I I I.C.
opera[ors of conshuc[ion ac[ivi[ies that are required to obtain UPA permits
13 14
(Part II G3 b) (Part II D 3)
b. For conshuc[ion ac[ivi[ies that are subject to the requirements of a use con[rol MS4,the regula[ed,hadi[ional land use con[rol MS4(provided the
regula[ed,[radi[ional land use conhol MS4: regula[ed,[radi[ional land use conhol MS4 is not the owneroropera[orof the
conshuc[ion ac[iviry).At a minimum,the owner oropera[or must comply with
(i) Five(5)business days from the date the Department receives both a the following requirements in order to be authorized to disturb greater than five
complete electronic version of the NOI(eN01)and signed"MS4 (5)acres of soil at any one time:
SWPPP Acceptance"form,or
a. The owner oropera[orshall have a qualified inspec[orconduct at least two
(ii) Ten(10)business days from the date the Department receives both a (2)site inspections in accordance with Part IV.C.of this permit every seven
complete paper version of the NOI and signed"MS4 SWPPP (7)calendar days,for as long as greater than five(5)acres of soil remain
Acceptance"form. disturbed.The two(2)inspections shall be separated by a minimum of two
(2)full calendar days.
4. Coverage under this permit authorizes stormwater discharges from only those
areas of disturbance that are identified in the NOI.If an owner oropera[or b. In areas where soil disturbance activity has temporarily or permanently
wishes to have stormwater discharges from future or additional areas of ceased,the application of soil stabilization measures must be initiated by
disturbance authorized,they must submit a new NOI that addresses that phase the end of the next business day and completed within seven(7)days from
of the development,unless otherwise notified by the Department.The owner or the date the current soil disturbance activity ceased.The soil stabilization
opera[or shall not commence conshuc[ion ac[ivity on the future or additional measures selected shall be in conformance with the technical standard,
areas until their authorization to discharge under this permit goes into effect in New York State Standards and Specifications for Erosion and Sediment
accordance with Part II.C.of this permit. Control,dated November 2016.
D. General Requirements For Owners or Operators With Permit Coverage c. The owner oropera[orshall prepare a phasing plan that defines maximum
1. The owner oropera[orshall ensure that the provisions of the SWPPP are disturbed area per phase and shows required cuts and fills.
implemented from the commencemen[of cons[ruc[ion ac[ivity until all areas of d. The owner oropera[orshall install any additional site-specific practices
disturbance have achieved final s[abiliza[ion and the Notice of Termination needed to protect water quality.
("NOT")has been submitted to the Department in accordance with Part V.of
this permit.This includes any changes made to the SWPPP pursuant to Part e. The owner oropera[orshall include the requirements above in their
III.A.4.of this permit. SWPPP
2. The owner oropera[orshall maintain a copy of the General Permit(GP-0-20- 4. In accordance with statute,regulations,and the terms and conditions of this
001),NOI,NOI Acknowledgmen[Le[[er,SWPPP,MS4 SWPPP Acceptance permit,the Department may suspend or revoke an owner's or opera[ors
form,inspection reports,responsible contractor s or subcontractor s certification coverage under this permit at any time if the Department determines that the
statement(see Part III.A.6.),and all documentation necessary to demonstrate SWPPP does not meet the permit requirements or consistent with Part VII.K..
eligibility with this permit at the conshuc[ion si[e until all disturbed areas have
achieved final s[abiliza[ion and the NOT has been submitted to the Department. 5. Upon a finding of significant non-compliance with the practices described in the
The documents must be maintained in a secure location,such as a job trailer, SWPPP or violation of this permit,the Department may order an immediate
on-site construction office,or mailbox with lock.The secure location must be stop to all activity at the site until the non-compliance is remedied.The stop
accessible during normal business hours to an individual performing a work order shall be in writing,describe the non-compliance in detail,and be
com pliance inspection. sent to the owner or opera[or.
3. The owner oropera[orof a conshuc[ion ac[iviry shall not disturb greater than 6. For conshuc[ion ac[ivi[ies that are subject to the requirements of a regula[ed,
five(5)acres of soil at any one time without prior written authorization from the [radi[ional land use conhol MS4,the owner oropera[orshall notify the
Department or,in areas under the jurisdiction of a regula[ed,[radi[ionalland
15 16
(Part II D.6) (Part II F 3)
regula[ed,[radi[ional land use conhol MS4 in writing of any planned opera[orwas not subject to a siuty(60)business day authorization period that
amendments or modifications to the post-construction stormwater management has not expired as of the date the Department receives the NOI from the new
practice component of the SWPPP required by Part III.A.4.and 5.of this owner oropera[or.
permit.Unless otherwise notified by the regula[ed,hadi[ionalland use con[rol
MS4,the owneroropera[orshall have the SWPPP amendments or
modifications reviewed and accepted by the regula[ed,[radi[ional land use Part III.STORMWATER POLLUTION PREVENTION PLAN(SWPPP)
con[rol MS4 prior to commencing construction of the post-construction
stormwater management practice. A. General SWPPP Requirements
E. Permit Coverage for Discharges Authorized Under GP-0-15-002 1. A SWPPP shall be prepared and implemented by the owneroropera[or of
each conshuc[ion ac[ivity covered by this permit.The SWPPP must document
1. Upon renewal of SPDES General Permit for Stormwater Discharges from the selection,design,installation,implementation and maintenance of the
Cons[ruc[ion Ac[iviry(Permit No.GP-0-15-002),an owneroropera[orof a control measures and practices that will be used to meet the effluent limitations
conshuc[ion ac[iviry with coverage under GP-0-15-002,as of the effective date in Part I.B.of this permit and where applicable,the post-construction
of GP-0-20-001,shall be authorized to discharge in accordance with GP-0-20- stormwater management practice requirements in Part I.C.of this permit.The
001,unless otherwise notified by the Department. SWPPP shall be prepared prior to the submittal of the NOI.The NOI shall be
submitted to the Department prior to the commencemen[of cons[ruc[ion
An owner oropera[or may continue to implement the technical/design ac[iviry.A copy of the completed,final NOI shall be included in the SWPPP.
components of the post-construction stormwater management controls
provided that such design was done in conformance with the technical 2. The SWPPP shall describe the erosion and sediment control practices and
standards in place at the time of initial project authorization.However,they where required,post-construction stormwater management practices that will
must comply with the other,non-design provisions of GP-0-20-001.
be used and/or constructed to reduce the pollu[an[s in stormwater discharges
F. Change of Owner or Operator and to assure compliance with the terms and conditions of this permit.In
addition,the SWPPP shall identify potential sources of pollution which may
1. When property ownership changes or when there is a change in operational reasonably be expected to affect the quality of stormwater discharges.
control over the construction plans and specifications,the original owner or
opera[or must notify the new owneroropera[or,in writina,of the requirement to 3. All SWPPPs that require the post-construction stormwater management
obtain permit coverage by submitting a NOI with the Department.For practice component shall be prepared by a qualified professional that is
conshuc[ion ac[ivi[ies subject to the requirements of a regula[ed,[radi[ional knowledgeable in the principles and practices of stormwater management and
land use con[rol MS4,the original owner oropera[or must also notify the MS4, treatment.
in writing,of the change in ownership at least 30 calendar days prior to the
change in ownership. 4. The owner oropera[or must keep the SWPPP current so that it at all times
accurately documents the erosion and sediment controls practices that are
2. Once the new owner oropera[orobtains permit coverage,the original owner or being used or will be used during construction,and all post-construction
opera[or shall then submit a completed NOT with the name and permit stormwater management practices that will be constructed on the site. At a
identification number of the new owneroropera[orto the Department at the minimum,the owner oropera[orshall amend the SWPPP,including
address in Part II.B.1.of this permit.If the original owner oropera[or maintains construction drawings:
ownership of a portion of the conshuc[ion ac[iviry and will disturb soil,they must
maintain their coverage under the permit. a. whenever the current provisions prove to be ineffective in minimizing
pollu[an[s in stormwater discharges from the site;
3. Permit coverage for the new owneror opera[orwill be effective as of the date
the Department receives a complete NOI,provided the original owner or
17 18
(Parc ui n.a e) (Parc u i n s)
b. whenever there is a change in design,construction,or operation at the the terms and conditions of the most current version of the New York State
conshuc[ion si[e that has or could have an effect on the discharge of Pollutant Discharge Elimination System("SPDES")general permit for
pollu[an[s; stormwater discharges from conshuc[ion ac[ivi[ies and that it is unlawful for
any person to cause or contribute to a violation of wa[erqualiry s[andards.
c. to address issues or deficiencies identified during an inspection by the Furthermore,I am aware that there are significant penalties for submitting
qualified inspec[or,the Department or other regulatory authority;and false information,that I do not believe to be true,including the possibility of
fine and imprisonmentfor knowing violations"
d. to document the final construction conditions.
In addition to providing the certification statement above,the certification page
5. The Department may notify the owner oropera[orat any time that the SWPPP must also identify the specific elements of the SWPPP that each contractor and
does not meet one or more of the minimum requirements of this permit.The subcontractor will be responsible for and include the name and title of the
notification shall be in writing and identify the provisions of the SWPPP that person providing the signature;the name and title of the[rained con[rac[or
require modification.Within fourteen(14)calendar days of such notification,or responsible for SWPPP implementation;the name,address and telephone
as otherwise indicated by the Department,the owner oropera[or shall make number of the contracting firm;the address(or other identifying description)of
the required changes to the SWPPP and submit written notification to the the site;and the date the certification statement is signed.The owner or
Department that the changes have been made.If the owner oropera[ordoes opera[or shall attach the certification statement(s)to the copy of the SWPPP
not respond to the Departmenfs comments in the specified time frame,the that is maintained at the conshuc[ion si[e.If new or additional contractors are
Department may suspend the owner's or opera[or's coverage under this permit hired to implement measures identified in the SWPPP after construction has
or require the owneroropera[orto obtain coverage under an individual SPDES commenced,they must also sign the certification statement and provide the
permit in accordance with Part II.D.4.of this permit. information listed above.
6. Prior to the commencemen[of cons[ruc[ion ac[ivity,the owner oropera[or must 7. For projects where the Department requests a copy of the SWPPP or
identify the contractor(s)and subcontractor(s)that will be responsible for inspection reports,the owner oropera[or shall submit the documents in both
installing,constructing,repairing,replacing,inspecting and maintaining the electronic(PDF only)and paper format within five(5)business days,unless
erosion and sediment control practices included in the SWPPP;and the otherwise notified by the Department.
contractor(s)and subcontractor(s)that will be responsible for constructing the
post-construction stormwater management practices included in the SWPPP.
The owneroropera[orshall have each of the contractors and subcontractors B. Required SWPPP Contents
identify at least one person from their company that will be responsible for 1. Erosion and sediment control component-All SWPPPs prepared pursuant to
implementation of the SWPPP.This person shall be known as the[rained this permit shall include erosion and sedimerit control practices designed in
con[rac[or.The owner oropera[or shall ensure that at least one[rained conformance with the technical standard,New York State Standards and
con[rac[or is on site on a daily basis when soil disturbance activities are being Specifications for Erosion and Sediment Control,dated November 2016.Where
pertormed. erosion and sediment control practices are not designed in conformance with
The owner oropera[orshall have each of the contractors and subcontractors the design criteria included in the technical standard,the owner oropera[or
identified above sign a copy of the following certification statement below must demonstrate equivalence to the technical standard.At a minimum,the
before they commence any conshuc[ion ac[iviry: erosion and sediment control component of the SWPPP shall include the
following:
"I hereby certify under penalty of law that I understand and agree to comply a. Background information about the scope of the project,including the
with the terms and conditions of the SWPPP and agree to implement any location,type and size of project
corrective actions identified by the qualified inspec[orduring a site
inspection. I also understand that the owner or opera[or must comply with
19 20
(Parc ui e�e) (Parc u i e�i)
b. A site map/construction drawing(s)for the project,including a general schedule shall be in accordance with the requirements in the technical
location map.At a minimum,the site map shall show the total site area;all standard,New York State Standards and Specifications for Erosion and
improvements;areas of disturbance;areas that will not be disturbed; Sediment Control,dated November 2016;
existing vegetation;on-site and adjacent off-site surtace water(s);
floodplain/floodway boundaries;wetlands and drainage patterns that could j. A description of the pollution prevention measures that will be used to
be affected by the cons[ruc[ion ac[iviry;existing and final contours; control litter,construction chemicals and construction debris from becoming
locations of different soil types with boundaries;material,waste,borrow or a pollu[an[source in the stormwater discharges;
equipment storage areas located on adjacent properties;and location(s)of
the stormwater discharge(s); k. A description and location of any stormwater discharges associated with
industrial activity other than construction at the site,including,but not limited
c. A description of the soil(s)present at the site,including an identification of to,stormwater discharges from asphalt plants and concrete plants located
the Hydrologic Soil Group(HSG); on the conshuc[ion si[e;and
d. A construction phasing plan and sequence of operations describing the I. Identification of any elements of the design that are not in conformance with
intended order of conshuc[ion ac[ivi[ies,including clearing and grubbing, the design criteria in the technical standard,New York State Standards and
excavation and grading,utility and infrastructure installation and any other Specifications for Erosion and Sediment Control,dated November 2016.
activity at the site that results in soil disturbance; Include the reason for the deviation or alternative design and provide
information which demonstrates that the deviation or alternative design is
e. A description of the minimum erosion and sediment control practices to be equivalen[to the technical standard.
installed or implemented for each conshuc[ion ac[iviry that will result in soil
disturbance.Include a schedule that identrfies the timing of initial placement 2. Post-construction stormwater management practice component—The owner or
or implementation of each erosion and sediment control practice and the opera[or of any construction project identified in Table 2 of Appendix B as
minimum time frames that each practice should remain in place or be needing post-construction stormwater management practices shall prepare a
implemented; SWPPP that includes practices designed in conformance with the applicable
sizing cri[eria in Part LC2.a.,c.or d.of this permit and the pertormance cri[eria
f. A temporary and permanent soil stabilization plan that meets the in the technical standard,New York State Stormwater Management Design
requirements of this general permit and the technical standard,New York Manual dated January 2015
State Standards and Specifications for Erosion and Sediment Control,dated
November 2016,for each stage of the project,including initial land clearing Where post-construction stormwater management practices are not designed
and grubbing to project completion and achievement of final s[abiliza[ion; in conformance with the pertormance cri[eria in the technical standard,the
owner oropera[or must include in the SWPPP the reason(s)for the deviation or
g. A site map/construction drawing(s)showing the specific location(s),size(s), alternative design and provide information which demonstrates that the
and length(s)of each erosion and sediment control practice; deviation or alternative design is equivalen[to the technical standard.
h. The dimensions,material specifications,installation details,and operation The post-construction stormwater management practice component of the
and maintenance requirements for all erosion and sediment control SWPPP shall include the following:
practices.Include the location and sizing of any temporary sediment basins
and structural practices that will be used to divert flows from exposed soils; a. Identification of all post-construction stormwater managemerit practices to
be constructed as part of the project.Include the dimensions,material
i. A maintenance inspection schedule for the contractor(s)identified in Part specifications and installation details for each post-construction stormwater
III.A.6.of this permit,to ensure continuous and effective operation of the management practice;
erosion and sediment control practices.The maintenance inspection
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(Part III B 2 b) (Part II I B 3)
b. A site map/construction drawing(s)showing the specific location and size of 3. Enhanced Phosphorus Removal Standards-All construction projects identified
each post-construction stormwater management practice; in Table 2 of Appendix B that are located in the watersheds identified in
Appendix C shall prepare a SWPPP that includes post-construction stormwater
c. A Stormwater Modeling and Analysis Report that includes: management practices designed in coriformance with the applicable sizing
(i) Map(s)showing pre-development conditions,including cri[eria in Part LC2.b.,c.or d.of this permit and the pertormance cri[eria,
watershed/subcatchments boundaries,flow paths/routing,and design Enhanced Phosphorus Removal Standards included in the Design Manual.At a
points; minimum,the post-construction stormwater management practice component
of the SWPPP shall include items 2.a-2.f.above.
(ii) Map(s)showing post-development conditions,including C. Required SWPPP Components by Project Type
watershed/subcatchments boundaries,flow paths/routing,design
points and post-construction stormwater management practices; Unless otherwise notified by the Department, owners or opera[ors of conshuc[ion
ui Results of stormwater modelin i e.h drolo and h draulic anal sis ac[ivi[ies identified in Table 1 of Appendix B are required to prepare a SWPPP that only
� � g�� Y gY Y Y � includes erosion and sediment control practices designed in conformance with Part
for the required storm events.I nclude supporting calculations(model II I.B.1 of this permit.Owners oropera[ors of the conshuc[ion ac[ivi[ies identified in Table
runs),methodology,and a summary table that compares pre and post- 2 of Appendix B shall prepare a SWPPP that also includes post-construction stormwater
development runoff rates and volumes for the different storm events; management practices designed in conformance with Part I II.B2 or 3 of this permit.
(iv) Summary table,with supporting calculations,which demonstrates that
each post-construction stormwater management practice has been Part IV.INSPECTION AND MAINTENANCE REQUIREMENTS
designed in conformance with the sizing cri[eria included in the Design
Manual; A. General Construction Site Inspection and Maintenance Requirements
(v) Identification of any sizing cri[eria that is not required based on the 1. The owner oropera[or must ensure that all erosion and sediment control
requirements included in Part I.C.of this permit;and practices(including pollution prevention measures)and all post-construction
(vi) Identification of any elements of the design that are not in conformance stormwater management practices identified in the SWPPP are inspected and
with the pertormance cri[eria in the Design Manual. Include the maintained in accordance with Part IV.B.and C.of this permit.
reason(s)for the deviation or alternative design and provide 2. The terms of this permit shall not be construed to prohibit the State of New
information which demonstrates that the deviation or alternative design York from exercising any authority pursuant to the ECL,common law or federal
is equivalen[to the Design Manual; law,or prohibit New York State from taking any measures,whether civil or
d. Soil testing results and locations(test pits,borings); criminal,to prevent violations of the laws of the State of New York or protect
the public health and safety and/or the environment.
e. Infiltration test results,when required;and
B. Contractor Maintenance Inspection Requirements
f. An operations and maintenance plan that includes inspection and
maintenance schedules and actions to ensure continuous and effective 1. The owner oropera[orof each conshuc[ion ac[ivity identified in Tables 1 and 2
operation of each post-construction stormwater management practice.The of Appendix B shall have a[rained con[rac[or inspect the erosion and sediment
plan shall identify the entity that will be responsible for the long term control practices and pollution prevention measures being implemented within
operation and maintenance of each practice. the active work area daily to ensure that they are being maintained in effective
operating condition at all times.If deficiencies are identified,the contractor shall
23 24
(Parciv e�) (Parciv c�a)
begin implementing corrective actions within one business day and shall in one of the watersheds listed in Appendix C and not directly discharging to
complete the corrective actions in a reasonable time frame. one of the 303(d)segments listed in Appendix E;
2. For construction sites where soil disturbance activities have been temporarily b. the construction of a single family home that involves a soil disturbance of
suspended(e.g.winter shutdown)and[emporary s[abiliza[ion measures have one(1)or more acres of land but less than five(5)acres and is not located
been applied to all disturbed areas,the[rained con[rac[or can stop conducting in one of the watersheds listed in Appendix C and not directly discharging to
the mairitenance inspections.The hained conhac[orshall begin conducting the one of the 303(d)segments listed in Appendix E;
maintenance inspections in accordance with Part IV.B.1.of this permit as soon
as soil disturbance activities resume. c. construction on agricultural property that involves a soil disturbance of one
(1)or more acres of land but less than five(5)acres;and
3. For construction sites where soil disturbance activities have been shut down
with partial project completion,the[rained con[rac[orcan stop conducting the d. conshuc[ion ac[ivi[ies located in the watersheds identified in Appendix D
maintenance inspections if all areas disturbed as of the project shutdown date that involve soil disturbances between five thousand(5,000)square feet
have achieved final s[abiliza[ion and all post-construction stormwater and one(1)acre of land.
management practices required for the completed portion of the project have
been constructed in coriformance with the SWPPP and are operational. 2. Unless otherwise notified by the Department,the qualified inspec[orshall
C. Qualified Inspector Inspection Requirements conduct site inspections in accordance with the following timetable:
The owner or opera[or shall have a qualified inspec[or conduct site inspections in a. For construction sites where soil disturbance activities are on-going,the
conformance with the following requirements: qualified inspec[orshall conduct a site inspection at least once every seven
(7)calendar days.
[Note:The[rained conhac[or identified in Part III.A.6.and IV.B.of this permit cannot
conductthe qualified inspec[orsite inspections unless they meet the qualified inspec[or b. For construction sites where soil disturbance activities are on-going and the
qualifications included in Appendix A.In order to pertorm these inspections,the[rained owner oropera[or has received authorization in accordance with Part II.D.3
con[rac[orwould have to be a: to disturb greater than five(5)acres of soil at any one time,the qualified
inspec[orshall conduct at least two(2)site inspections every seven(7)
• licensed Professional Engineer, calendar days.The two(2)inspections shall be separated by a minimum of
• Certified Professional in Erosion and Sediment Control(CPESC), two(2)full calendar days.
• New York State Erosion and Sediment Control Certificate Program holder
• Registered Landscape Architect,or c. For construction sites where soil disturbance activities have been
• someone working under the direct supervision of,and at the same company as, temporarily suspended(e.g.winter shutdown)and[emporary s[abiliza[ion
the licensed Professional Engineer or Registered Landscape Architect,provided measures have been applied to all disturbed areas,the qualified inspec[or
they have received four(4)hours of Department endorsed training in proper shall conduct a site inspection at least once every thirty(30)calendar days.
erosion and sediment control principles from a Soil and Water Conservation The owneroropera[orshall notify the DOW Water(SPDES)Program
District,or other Department endorsed entity]. contact at the Regional Office(see contact information in Appendix F)or,in
areas under the jurisdiction of a regula[ed,hadi[ionalland use conhol MS4,
1. A qualified inspec[orshall conduct site inspections for all conshuc[ion ac[ivi[ies the regula[ed,hadi[ional land use con[rol MS4(provided the regula[ed,
identified in Tables 1 and 2 of Appendix B,with the exception of: [radi[ional land use conhol MS4 is not the owner oropera[orof the
conshuc[ion ac[iviry)in writing prior to reducing the frequency of
a. the construction of a single family residential subdivision with 25%or less inspections.
impervious coverat total site build-out that involves a soil disturbance of
one(1)or more acres of land but less than five(5)acres and is not located
25 26
(Parc iv cz d) (Parc iv ca a)
d. For construction sites where soil disturbance activities have been shut down a. Date and time of inspection;
with partial project completion,the qualified inspec[or can stop conducting
inspections if all areas disturbed as of the project shutdown date have b. Name and title of person(s)performing inspection;
achieved final s[abiliza[ion and all post-construction stormwater
management practices required for the completed portion of the project c. A description of the weather and soil conditions(e.g.dry,wet,saturated)at
have been constructed in conformance with the SWPPP and are the time of the inspection;
operational.The owneroropera[or shall notify the DOW Water(SPDES)
Program contact at the Regional Office(see contact information in Appendix d. A description of the condition of the runoff at all points of discharge from the
F)or,in areas under the jurisdiction of a regula[ed,[radi[ional land use conshuc[ion si[e.This shall include identification of any discharges of
con[rol MS4,the regula[ed,hadi[ionalland use con[rol MS4(provided the sediment from the cons[ruc[ion si[e.Include discharges from conveyance
regula[ed,[radi[ionalland use conhol MS4 is notthe owneroropera[orof systems(i.e.pipes,culverts,ditches,etc.)and overland flow;
the conshuc[ion ac[iviry)in writing prior to the shutdown.If soil disturbance
activities are not resumed within 2 years from the date of shutdown,the e. A description of the condition of all natural surtace waterbodies located
owner oropera[orshall have the qualified inspec[or perform a final within,or immediately adjacent to,the property boundaries of the
inspection and certify that all disturbed areas have achieved final conshuc[ion si[e which receive runoff from disturbed areas.This shall
s[abiliza[ion,and all temporary,structural erosion and sediment control include identification of any discharges of sediment to the surtace
measures have been removed;and that all post-construction stormwater waterbody;
management practices have been constructed in conformance with the
SWPPP by signing the"Final S[abiliza[ion"and"Post-Construction f. Identification of all erosion and sediment coritrol practices and pollution
Stormwater Management Practice"certifcation statements on the NOT.The prevention measures that need repair or maintenance;
owner oropera[orshall then submit the completed NOT form to the address
in Part II.B.1 of this permit. g. Identification of all erosion and sediment control practices and pollution
prevention measures thatwere not installed properly or are notfunctioning
e. For construction sites that directly discharge to one of the 303(d)segments as designed and need to be reinstalled or replaced;
listed in Appendix E or is located in one of the watersheds listed in
Appendix C,the qualified inspec[orshall conduct at leasttwo(2)site h. Description and sketch of areas with active soil disturbance activity,areas
inspections every seven(7)calendar days.The two(2)inspections shall be that have been disturbed but are inactive at the time of the inspection,and
separated by a minimum of two(2)full calendar days. areas that have been stabilized(temporary and/or final)since the last
inspection;
3. At a minimum,the qualified inspec[or shall inspect all erosion and sediment
control practices and pollution prevention measures to ensure iritegrity and i. Current phase of construction of all post-construction stormwater
effectiveness,all post-construction stormwater management practices under management practices and identification of all construction that is not in
construction to ensure that they are constructed in conformance with the conformance with the SWPPP and technical standards;
SWPPP,all areas of disturbance that have not achieved final s[abiliza[ion,all
points of discharge to natural surface waterbodies located within,or j. Corrective action(s)that must be taken to install,repair,replace or maintain
immediately adjacent to,the property boundaries of the cons[ruc[ion si[e,and erosion and sediment control practices and pollution prevention measures;
all points of discharge from the conshuc[ion si[e. and to correct deficiencies identified with the construction of the post-
construction stormwater management practice(s);
4. The qualified inspec[orshall prepare an inspection report subsequent to each
and every inspection.At a minimum,the inspection report shall include and/or k. Identification and status of all corrective actions that were required by
address the following: previous inspection;and
27 28
(Parc i v.ca i) (Parc v n.z e)
I. Digital photographs,with date stamp,that clearly show the condition of all b. Planned shutdown with partial project completion-All soil disturbance
practices that have been identified as needing corrective actions.The activities have ceased;and all areas disturbed as of the project shutdown
qualified inspec[orshall attach paper color copies of the digital photographs date have achieved final s[abiliza[ion;and all temporary,structural erosion
to the inspection report being maintained onsite within seven(7)calendar and sediment control measures have been removed;and all post-
days of the date of the inspection.The qualified inspec[orshall also take construction stormwater management practices required for the completed
digital photographs,with date stamp,that clearly show the condition of the portion of the project have been constructed in conformance with the
practice(s)after the corrective action has been completed.The qualified SWPPP and are operational;
inspec[orshall attach paper color copies of the digital photographs to the
inspection report that documents the completion of the corrective action c. A new owner oropera[or has obtained coverage under this permit in
work within seven(7)calendar days of that inspection. accordance with Part II.F.of this permit.
5. Within one business day of the completion of an inspection,the qualified d. The owneroropera[orobtains coverage under an alternative SPDES
inspec[orshall notify the owner oropera[orand appropriate contractor or general permit or an individual SPDES permit.
subcontractor identified in Part III.A.6.of this permit of any corrective actions
that need to be taken.The contractor or subcontractor shall begin implementing 3. For conshuc[ion ac[ivi[ies meeting subdivision 2a.or 2b.of this Part,the owner
the corrective actions within one business day of this notification and shall or opera[or shall have the qualified inspec[or pertorm a final site inspection
complete the corrective actions in a reasonable time frame. prior to submitting the NOT.The qualified inspec[orshall,by signing the"Final
S[abiliza[ion"and"Post-Construction Stormwater Management Practice
6. All inspection reports shall be signed by the qualified inspec[or.Pursuant to certification statements on the NOT,certify that all the requirements in Part
Part II.D2.of this permit,the inspection reports shall be maintained on site with V.A.2.a.or b.of this permit have been achieved.
the SWPPP.
4. For conshuc[ion ac[ivi[ies that are subject to the requirements of a regula[ed,
[radi[ional land use conhol MS4 and meet subdivision 2a.or 2b.of this Part,the
Part V.TERMINATION OF PERMIT COVERAGE owneroropera[orshall have the regula[ed,[radi[ionalland use conhol MS4
sign the"MS4 Acceptance"statement on the NOT in accordance with the
A. Termination of Permit Coverage requirements in Part VII.H.of this permit.The regula[ed,[radi[ional land use
con[rol MS4 official,by signing this statement,has determined that it is
1. An owner oropera[orthat is eligible to terminate coverage under this permit acceptable for the owner oropera[orto submit the NOT in accordance with the
must submit a completed NOT form to the address in Part II.B.1 of this permit. requirements of this Part.The regula[ed,[radi[ional land use conhol MS4 can
The NOT form shall be one which is associated with this permit,signed in make this determination by performing a final site inspection themselves or by
accordance with Part VII.H of this permit. accepting the qualified inspec[ors fnal site inspection certification(s)required
in Part V.A.3.of this permit.
2. An owner oropera[or may terminate coverage when one or more the following
conditions have been met: 5. For conshuc[ion ac[ivi[ies that require post-construction stormwater
management practices and meet subdivision 2a.of this Part,the owner or
a. Total project completion-All conshuc[ion ac[iviry identified in the SWPPP opera[or must,prior to submitting the NOT,ensure one of the following:
has been completed;and all areas of disturbance have achieved final
s[abiliza[ion;and all temporary,structural erosion and sediment control a. the post-construction stormwater management practice(s)and any right-of-
measures have been removed;and all post-construction stormwater way(s)needed to maintain such practice(s)have been deeded to the
management practices have been constructed in conformance with the municipality in which the practice(s)is located,
SWPPP and are operational;
29 30
(Parc v n.s e) (Parc wi n)
b. an executed maintenance agreement is in place with the municipality that Act(CWA)and the ECL and is grounds for an enforcement action againstthe owneror
will maintain the post-construction stormwater management practice(s), opera[or and/or the contractor/subcontractor; permit revocation, suspension or
modification;or denial of a permit renewal application.Upon a finding of significant non-
c. for post-construction stormwater management practices that are privately compliance with this permit or the applicable SWPPP,the Department may order an
owned,the owner oropera[or has a mechanism in place that requires immediate stop to all conshuc[ion ac[ivity at the site until the non-compliance is
operation and maintenance of the practice(s)in accordance with the remedied.The stop work order shall be in writing,shall describe the non-compliance in
operation and maintenance plan,such as a deed covenant in the owneror detail,and shall be sentto the owneroropera[or.
opera[or's deed of record,
d. for post-construction stormwater management practices that are owned by If any human remains or archaeological remains are encountered during excavation,
a public or private institution(e.g.school,university,hospital),government the owner or opera[or must immediately cease,or cause to cease,all conshuc[ion
agency or authority,or public utility;the owner oropera[or has policy and ac[iviry in the area of the remains and notify the appropriate Regional Water Engineer
procedures in place that ensures operation and maintenance of the (RWE).Conshuc[ion ac[ivityshall not resume until written permission to do so has been
practices in accordance with the operation and maintenance plan. received from the RWE.
Part VI.REPORTING AND RETENTION RECORDS B. Continuation of the Expired General Permit
A. Record Retention This permit expires five(5)years from the effective date.If a new general permit is not
issued prior to the expiration of this general permit,an owneroropera[orwith coverage
The owner oropera[orshall retain a copy of the NOI,NOI under this permit may continue to operate and discharge in accordance with the terms
Acknowledgment Letter,SWPPP,MS4 SWPPP Acceptance form and any inspection and conditions of this general permit, if it is eutended pursuant to the State
reports that were prepared in conjunction with this permit for a period of at least five(5) Administrative Procedure Act and 6 NYCRR Part 621,until a new general permit is
years from the date that the Department receives a complete NOT submitted in issued.
accordance with Part V.of this general permit. C. Enforcement
B.Addresses Failure of the owneroropera[or,its contractors,subcontractors,agents and/or assigns
to strictly adhere to any of the permit requirements contained herein shall constitute a
With the exception of the NOI,NOT,and MS4 SWPPP Acceptance form(which must violation of this permit.There are substantial criminal,civil,and administrative penalties
be submitted to the address referenced in Part II.B.1 of this permit), all written associated with violating the provisions of this permit. Fines of up to$37,500 per day
correspondence requested by the Department,including individual permit applications, for each violation and imprisonmerit for up to fifteen(15)years may be assessed
shall be sent to the address of the appropriate DOW Water(SPDES)Program contact depending upon the nature and degree of the offense.
at the Regional Office listed in Appendix F.
D. Need to Halt or Reduce Activity Not a Defense
Part VII.STANDARD PERMIT CONDITIONS
It shall not be a defense for an owneroropera[or in an enforcement action that it would
A. Duty to Comply have been necessary to halt or reduce the conshuc[ion ac[ivity in order to maintain
compliance with the conditions of this permit.
The owner or opera[or must comply with all conditions of this permit. All contractors
and subcontractors associated with the project must comply with the terms of the
SWPPP.Any non-compliance with this permit constitutes a violation of the Clean Water
31 32
(Parcvu E) (Parcwi H.�a)
E. Duty to Mitigate (i) a president,secretary,treasurer,or vice-president of the corporation in
charge of a principal business function,or any other person who
The owner oropera[or and its contractors and subcontractors shall take all reasonable performs similar policy or decision-making functions for the
steps to minimize or prevent any discharge in violation of this permit which has a corporation;or
reasonable likelihood of adversely affecting human health or the environment.
(ii) the manager of one or more manufacturing,production or operating
F. Duty to Provide Information facilities,provided the manager is authorized to make management
decisions which govern the operation of the regulated facility including
The owner or opera[or shall furnish to the Department,within a reasonable specified having the explicit or implicit duty of making major capital investment
time period of a written request,all documentation necessary to demonstrate eligibility recommendations,and initiating and directing other comprehensive
and any information to determine compliance with this permit or to determine whether measures to assure long term environmental compliance with
cause exists for modifying or revoking this permit,or suspending or denying coverage environmental laws and regulations;the manager can ensure that the
under this permit,in accordance with the terms and conditions of this permit.The NOI, necessary systems are established or actions taken to gather complete
SWPPP and inspection reports required by this permit are public documents that the and accurate information for permit application requirements;and
owneroropera[ormust make available for review and copying by any person within five where authority to sign documents has been assigned or delegated to
(5)business days of the owner or opera[or receiving a written request by any such the manager in accordance with corporate procedures;
person to review these documents. Copying of documents will be done at the
requester s expense. b. For a partnership or sole proprietorship these forms shall be signed by a
general partner or the proprietor,respectively;or
G.Other Information
c. For a municipality,State,Federal,or other public agency these forms shall
When the owner or opera[or becomes aware that they failed to submit any relevant be signed by either a principal executive officer or ranking elected official.
facts,or submitted incorrect information in the NOI or in any of the documents required For purposes of this section,a principal executive officer of a Federal
by this permit,or have made substantive revisions to the SWPPP(e.g.the scope of the agency includes:
project changes significantly,the type of post-construction stormwater management
practice(s) changes, there is a reduction in the sizing of the post-construction (i) the chief executive officer of the agency,or
stormwater management practice,or there is an increase in the disturbance area or
impervious a2a), which were not reflected in the original NOI submitted to the (ii) a senior executive officer having responsibility for the overall
Department,they shall promptly submit such facts or information to the Department operations of a principal geographic unit of the agency(e.g.,Regional
using the contact information in Part II.A.of this permit.Failure of the owneroropera[or Administrators of EPA).
to correct or supplement any relevant facts within five(5)business days of becoming
aware of the deficiency shall constitute a violation of this permit. 2. The SWPPP and other information requested by the Department shall be
signed by a person described in Part VII.H.1.of this permit or by a duly
H. Signatory Requirements authorized representative of that person.A person is a duly authorized
representative only if:
1. All NOIs and NOTs shall be signed as follows:
a. The authorization is made in writing by a person described in Part VII.H.1.
a. For a corporation these forms shall be signed by a responsible corporate of this permit;
officer.For the purpose of this section,a responsible corporate officer
means: b. The authorization specifies either an individual or a position having
responsibility for the overall operation of the regulated facility or activity,
such as the position of plant manager,operator of a well or a well field,
33 34
(Part VII H 2b) (Part VI I K 1)
superintendent,position of equivalen[responsibility,or an individual or include a brief statement of the reasons for this decision,an application form,
position having overall responsibility for environmental matters for the a statement setting a time frame for the owner or operator to file the
company.(A duly authorized representative may thus be either a named application for an individual SPDES permit,and a deadline,not sooner than
individual or any individual occupying a named position)and, 180 days from owner or operator receipt of the notification letter,whereby the
authorization to discharge under this general permit shall be terminated.
c. The written authorization shall include the name,title and signature of the Applications must be submitted to the appropriate Permit Administrator at the
authorized representative and be attached to the SWPPP. Regional Office.The Department may grant additional time upon
demonstration,to the satisfaction of the Department,that additional time to
3. All inspection reports shall be signed by the qualified inspec[orthat pertorms apply for an alternative authorization is necessary or where the Department
the inspection. has not provided a permit determination in accordance with Part 621 of this
Title.
4. The MS4 SWPPP Acceptance form shall be signed by the principal executive
officer or ranking elected official from the regula[ed,hadi[ionalland use conhol 2.When an individual SPDES permit is issued to a discharger authorized to
MS4,or by a duly authorized representative of that person. discharge under a general SPDES permit for the same discharge(s),the
general permit authorization for outfalls authorized under the individual
It shall constitute a permit violation if an incorrect and/or improper signatory SPDES permit is automatically terminated on the effective date of the
authorizes any required forms,SWPPP and/or inspection reports. individual permit unless termination is earlier in accordance with 6 NYCRR
Part 750.
I. Property Rights
L. Proper Operation and Maintenance
The issuance of this permit does not convey any property rights of any sort,nor any
exclusive privileges,nor does it authorize any injury to private property nor any invasion The owneroropera[orshall at all times properly operate and maintain all facilities and
of personal rights,nor any infringement of Federal,State or local laws or regulations. systems of treatment and control(and related appurtenances)which are installed or
Owners or opera[ors must obtain any applicable conveyances,easements,licenses used by the owner oropera[orto achieve compliance with the conditions of this permit
and/or access to real property prior to commencing cons[ruc[ion ac[ivity. and with the requirements of the SWPPP.
J. Severability M.Inspection and Entry
The provisions of this permit are severable,and if any provision of this permit,or the The owner or opera[or shall allow an authorized representative of the Department,
application of any provision of this permit to any circumstance, is held invalid,the EPA,applicable county health department,or,in the case of a conshuc[ion si[e which
application of such provision to other circumstances,and the remainder of this permit discharges through an MS4,an authorized representative of the MS4 receiving the
shall not be affected thereby. discharge, upon the presentation of credentials and other documents as may be
required by law,to:
K. Requirement to Obtain Coverage Under an Alternative Permit 1.Enter upon the owner s or operator's premises where a regulated facility or
activity is located or conducted or where records must be kept under the
1. The Department may require any owner or operator authorized by this permit to conditions of this permit;
apply for and/or obtain either an individual SPDES permit or another SPDES
general permit.When the Department requires any discharger authorized by a 2.Have access to and copy at reasonable times,any records that must be kept
general permit to apply for an individual SPDES permit,it shall notify the under the conditions of this permit;and
discharger in writing that a permit application is required.This notice shall
35 36
(Part VII.M 3) (Part VII.R)
3.Inspect at reasonable times any facilities or equipment(including monitoring R. Other Permits
and control equipment),practices or operations regulated or required by this
permit. Nothing in this permit relieves the owneroropera[orfrom a requirement to obtain any
other permits required by law.
4.Sample or monitor at reasonable times,for purposes of assuring permit
compliance or as otherwise authorized by the Act or ECL,any substances or
parameters at any location.
N. Permit Actions
This permit may,at any time,be modified,suspended,revoked,or renewed by the
Department in accordance with 6 NYCRR Part 621.The filing of a request by the
owneroropera[orfor a permit modification,revocation and reissuance,termination,a
notification of planned changes or anticipated noncompliance does not limit,diminish
and/or stay compliance with any terms of this permit.
O. Definitions
Definitions of key terms are included in Appendix A of this permit.
P. Re-Opener Clause
1.If there is evidence indicating potential or realized impacts on water quality
due to any stormwater discharge associated with construction activity covered
by this permit,the owner or operator of such discharge may be required to
obtain an individual permit or alternative general permit in accordance with
Part VII.K.of this permit or the permit may be modified to include different
limitations and/or requirements.
2.Any Department initiated permit modification,suspension or revocation will be
conducted in accordance with 6 NYCRR Part 621,6 NYCRR 750-1.18,and 6
NYCRR 750-120.
Q. Penalties for Falsification of Forms and Reports
In accordance with 6NYCRR Part 750-2.4 and 750-2.5,any person who knowingly
makes any false material statement,representation,or certification in any application,
record,report or other document filed or required to be maintained under this permit,
including reports of compliance or noncompliance shall,upon conviction,be punished
in accordance with ECL§71-1933 and or Articles 175 and 210 of the New York State
PenalLaw.
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APPENDIX A—Acronyms and Definitions Definitions
All definitions in this section are solelv for the purposes of this permit.
Acronyms Agricultural Building—a structure designed and constructed to house farm
APO—Agency Preservation Officer implements,hay,grain,poultry,livestock or other horticultural products;excluding any
BMP—Best Management Practice structure designed,constructed or used,in whole or in part,for human habitation,as a
CPESC—Certified Professional in Erosion and Sediment Control place of employment where agricultural products are processed,treated or packaged,
Cpv—Channel Protection Volume or as a place used by the public.
CWA—Clean Water Act(or the Federal Water Pollution Control Act,33 U.S.C.§1251 et Agricultural Property—means the land for construction of a barn,agricul[ural building,
seq) silo,stockyard,pen or other structural practices identified in Table II in the"Agricultural
DOW—Division of Water Management Practices Catalog for Nonpoint Source Pollution in New York State"
EAF—Environmental Assessment Form prepared by the Department in cooperation with agencies of New York Nonpoint Source
ECL-Environmental Conservation Law Coordinating Committee(dated June 2007).
EPA—U.S.Environmental Protection Agency
HSG—Hydrologic Soil Group Alter Hydrology from Pre to Post-Development Conditions-means the post-
MS4—Municipal Separate Storm Sewer System development peak flow rate(s)has increased by more than 5%of the pre-developed
NOI—Notice of Intent condition for the design storm of interest(e.g.10 yr and 100 yr).
NOT—Notice of Termination
NPDES—National Pollutant Discharge Elimination System Combined Sewer-means a sewer that is designed to collect and convey both
OPRHP—Office of Parks,Recreation and Historic Places "sewage"and"stormwater".
Qf—Extreme Flood
Qp—Overbank Flood Commence(Commencement o�Construction Activities-means the initial
RRv—Runoff Reduction Volume disturbance of soils associated with clearing,grading or excavation activities;or other
RWE—Regional Water Engineer construction related activities that disturb or expose soils such as demolition,stockpiling
SEQR—State Environmental Quality Review of fill material,and the initial installation of erosion and sediment control practices
SEQRA-State Environmental Quality Review Act required in the SWPPP.See definition for"Conshuc[ion Ac[iviry(iesf'also.
SHPA—State Historic Preservation Act
SPDES—State Pollutant Discharge Elimination System Construction Activit ies means an clearin radin excavation,fillin demolition
SWPPP—Stormwater Pollution Prevention Plan Y� � Y g'g g' g'
TMDL—Total Maximum Daily Load or stockpiling activities that result in soil disturbance.Clearing activities can include,but
UPA—Uniform Procedures Act are not limited to,logging equipment operation,the cutting and skidding of trees,stump
USDA—United States Department of Agriculture removal and/or brush root removal.Construction activity does not include routine
WQv—Water Quality Volume maintenance that is pertormed to maintain the original line and grade,hydraulic
capacity,or original purpose of a facility.
Construction Site—means the land area where conshuc[ion ac[iviry(ies)will occur.
See definition for"Commence(Commencemen[o�Cons[ruc[ion Ac[ivi[ies"and"Larger
Common Plan of Developmen[or Sale"also.
Dewatering—means the act of draining rainwater and/or groundwater from building
foundations,vaults or excavations/trenches.
Direct Discharge(to a specific surface waterbody)-means that runoff flows from a
conshuc[ion si[e by overland flow and the first point of discharge is the specific surtace
waterbody,or runoff flows from a conshuc[ion si[e to a separate storm sewer system
39 40
Appendix A Appendix A
and the first point of discharge from the separate storm sewer system is the specific Larger Common Plan of Development or Sale-means a contiguous area where
surtace waterbody. multiple separate and distinct conshuc[ion ac[ivi[ies are occurring,or will occur,under
one plan.The term"plan"in"larger common plan of development or sale"is broadly
Discharge(s)-means any addition of any pollutant to waters of the State through an defined as any announcement or piece of documentation(including a sign,public notice
outlet or poin[source. or hearing,marketing plan,advertisement,drawing,permit application,State
Environmental Quality Review Act(SEQRA)environmental assessment form or other
Embankment—means an earthen or rock slope that supports a road/highway. documents,zoning request,computer design,etc.)or physical demarcation(including
boundary signs,lot stakes,surveyor markings,etc.)indicating that cons[ruc[ion
Endangered or Threatened Species—see 6 NYCRR Part 182 of the Departmenfs ac[ivi[ies may occur on a specific plot.
rules and regulations for definition of terms and requirements.
For discrete construction projects that are located within a larger common plan of
Environmental Conservation Law(ECL)-means chapter 43-B of the Consolidated development or sale that are at least 1/4 mile apart,each project can be treated as a
Laws of the State of New York,entitled the Environmental Conservation Law. separate plan of development or sale provided any interconnecting road,pipeline or
utility project that is part of the same"common plan"is not concurrently being disturbed.
Equivalent(Equivalence)—means that the practice or measure meets all the
performance,longevity,maintenance,and safety objectives of the technical standard Minimize—means reduce and/or eliminate to the extent achievable using control
and will provide an equal or greater degree of water quality protection. measures(including best management practices)that are technologically available and
economically practicable and achievable in light of best industry practices.
Final Stabilization-means that all soil disturbance activities have ceased and a
uniform,perennial vegetative cover with a density of eighty(80)percent over the entire Municipal Separate Storm Sewer(MS4)-a conveyance or system of conveyances
pervious surtace has been established;or other equivalent stabilization measures,such (including roads with drainage systems,municipal streets,catch basins,curbs,gutters,
as permanent landscape mulches,rock rip-rap or washed/crushed stone have been ditches,man-made channels,or storm drains):
applied on all disturbed areas that are not covered by permanent structures,concrete or
pavement. (i) Owned or operated by a State,city,town,borough,county,parish,district,
association,or other public body(created by or pursuant to State law)having
General SPDES permit-means a SPDES permit issued pursuant to 6 NYCRR Part jurisdiction over disposal of sewage,industrial wastes,stormwater,or other
750-121 and Section 70-0117 of the ECL authorizing a category of discharges. wastes,including special districts under State law such as a sewer district,
flood control district or drainage district,or similar entity,or an Indian tribe or
Groundwater(s)-means waters in the saturated zone.The saturated zone is a an authorized Indian tribal organization,or a designated and approved
subsurtace zone in which all the interstices are filled with water under pressure greater management agency under section 208 of the CWA that discharges to
than that of the atmosphere.Although the zone may contain gas-filled interstices or surtace waters of the State;
interstices filled with fluids other than water,it is still considered saturated. (ii) Designed or used for collecting or conveying stormwater;
(iii)Which is not a combined sewer,and
Historic Property—means any building,structure,site,object or district that is listed on (iv)Which is not part of a Publicly Owned Treatmerit Works(POTW)as defined
the State or National Registers of Historic Places or is determined to be eligible for at 40 CFR 122.2.
listing on the State or National Registers of Historic Places.
National Pollutant Discharge Elimination System(NPDES)-means the national
Impervious Area(Cover)-means all impermeable surtaces that cannot effectively system for the issuance of wastewater and stormwater permits under the Federal Water
infiltrate rainfall.This includes paved,concrete and gravel surtaces(i.e.parking lots, Pollution Control Act(Clean Water Act).
driveways,roads,runways and sidewalks);building rooftops and miscellaneous
impermeable structures such as patios,pools,and sheds. Natural Buffer—means an undisturbed area with natural cover running along a surtace
water(e.g.wetland,stream,river,lake,etc.).
Infeasible—means not technologically possible,or not economically practicable and
achievable in light of best industry practices. New Development—means any land disturbance that does not meet the definition of
Redevelopment Activity included in this appendix.
41 42
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New York State Erosion and Sediment Control Certificate Program—a certificate Qualified Inspector-means a person that is knowledgeable in the principles and
program that establishes and maintains a process to identify and recognize individuals practices of erosion and sediment control,such as a licensed Professional Engineer,
who are capable of developing,designing,inspecting and maintaining erosion and Certified Professional in Erosion and Sediment Control(CPESC),Registered
sediment control plans on projects that disturb soils in New York State.The certificate Landscape Architect,New York State Erosion and Sediment Control Certificate
program is administered by the New York State Conservation District Employees Program holder or other Department endorsed individual(s).
Association.
It can also mean someone working under the direct supervision of,and at the same
NOI Acknowledgment Letter-means the letter that the Department sends to an company as,the licensed Professional Engineer or Registered Landscape Architect,
owner or operator to acknowledge the Departmenfs receipt and acceptance of a provided that person has training in the principles and practices of erosion and sediment
complete Notice of Intent.This letter documents the owner s or operator s authorization control.Training in the principles and practices of erosion and sediment control means
to discharge in accordance with the general permit for stormwater discharges from that the individual working under the direct supervision of the licensed Professional
conshuc[ion ac[iviry. Engineer or Registered Landscape Architect has received four(4)hours of Department
endorsed training in proper erosion and sediment control principles from a Soil and
Nonpoint Source-means any source of water pollution or pollutants which is not a Water Conservation District,or other Department endorsed entity.After receiving the
discrete conveyance or poin[source permitted pursuant to Title 7 or 8 of Article 17 of initial training,the individual working under the direct supervision of the licensed
the Environmental Conservation Law(see ECL Section 17-1403). Professional Engineer or Registered Landscape Architect shall receive four(4)hours of
training every three(3)years.
Overbank—means flow events that exceed the capacity of the stream channel and spill
out into the adjacent floodplain. It can also mean a person that meets the Qualified Professional qualifications in
addition to the Qualified Inspec[orqualifications.
Owner or Operator-means the person,persons or legal entity which owns or leases
the property on which the conshuc[ion ac[iviry is occurring; an entity that has Note:Inspections of any post-construction stormwater management practices that
operational control over the construction plans and specifications,including the ability to include structural components,such as a dam for an impoundment,shall be performed
make modifications to the plans and specifications;and/or an entity that has day-to-day by a licensed Professional Engineer.
operational control of those activities at a project that are necessary to ensure
compliance with the permit conditions. Qualified Professional-means a person that is knowledgeable in the principles and
practices of stormwater management and treatment,such as a licensed Professional
Pertormance Criteria—means the design cnteria listed under the"Required Elements" Engineer,Registered Landscape Architect or other Department endorsed individual(s).
sections in Chapters 5,6 and 10 of the technical standard,New York State Stormwater Individuals preparing SWPPPs that require the post-construction stormwater
Management Design Manual,dated January 2015.It does not include the Sizing management practice component must have an understanding of the principles of
Criteria(i.e.WQv,RRv,Cpv,Qp and Qf)in Part I.C2.of the permit. hydrology,water quality management practice design,water quantity control design,
and,in many cases,the principles of hydraulics.All components of the SWPPP that
Point Source-means any discernible,confined and discrete conveyance,including but involve the practice of engineering,as defined by the NYS Education Law(see Article
not limited to any pipe,ditch,channel,tunnel,conduit,well,discrete fissure,container, 145),shall be prepared by,or under the direct supervision of,a professional engineer
rolling stock,concentrated animal feeding operation,vessel or other floating craft,or licensed to practice in the State of New York.
landfill leachate collection system from which pollu[an[s are or may be discharged.
Redevelopment Activity(ies)—means the disturbance and reconstruction of existing
Pollutant-means dredged spoil,filter backwash,solid waste,incinerator residue, impervious area,including impervious areas that were removed from a project site within
sewage,garbage,sewage sludge,munitions,chemical wastes,biological materials, five(5)years of preliminary project plan submission to the local government(i.e.site plan,
radioactive materials,heat,wrecked or discarded equipment,rock,sand and industrial, subdivision,etc.).
municipal,agricultural waste and ballast discharged into water;which may cause or
might reasonably be expected to cause pollution of the waters of the state in
contravention of the standards or guidance values adopted as provided in 6 NYCRR Regulated,Traditional Land Use Control MS4-means a city,town or village with
Parts 700 et seq. land use control authority that is authorized to discharge under New York State DEC's
43 44
Appendix A Appendix A
SPDES General Permit For Stormwater Discharges from Municipal Separate
Stormwater Sewer Systems(MS4s)or the City of New York's Individual SPDES Permit Steep Slope—means land area designated on the current United States Department of
for their Municipal Separate Storm Sewer Systems(NY-0287890). Agnculture("USDA")Soil Survey as Soil Slope Phase"D",(provided the map unit name
is inclusive of slopes greater than 25%),or Soil Slope Phase E or F,(regardless of the
Routine Maintenance Activity-means cons[ruc[ion ac[iviry that is pertormed to map unit name),or a combination of the three designations.
maintain the original line and grade,hydraulic capacity,or original purpose of a facility,
including,but not limited to: Streambank—as used in this permit,means the terrain alongside the bed of a creek or
stream.The bank consists of the sides of the channel,between which the flow is corifined.
• Re-grading of gravel roads or parking lots,
• Cleaning and shaping of existing roadside ditches and culverts that maintains Stormwater Pollution Prevention Plan(SWPPP)—means a project specific report,
the approximate original line and grade,and hydraulic capacity of the ditch, including construction drawings,that among other things: describes the construction
• Cleaning and shaping of existing roadside ditches that does not maintain the activity(ies),identifies the potential sources of pollution at the conshuc[ion si[e;describes
approximate original grade,hydraulic capacity and purpose of the ditch if the and shows the stormwater controls that will be used to control the pollutants(i.e.erosion
changes to the line and grade,hydraulic capacity or purpose of the ditch are and sediment controls; for many projects, includes post-construction stormwater
installed to improve water quality and quantity controls(e.g.installing grass management controls);and identifies procedures the owneroropera[orwill implement to
lined ditch), comply with the terms and conditions of the permit. See Part III of the permit for a
• Placement of aggregate shoulder backing that stabilizes the transition between complete description of the information that must be included in the SWPPP.
the road shoulder and the ditch or embankmen[,
• Full depth milling and filling of existing asphalt pavements,replacement of Surtace Waters of the State-shall be construed to include lakes,bays,sounds,
concrete pavement slabs,and similar work that does not expose soil or disturb ponds,impounding reservoirs,springs,rivers,streams,creeks,estuaries,marshes,
the bottom six(6)inches of subbase material, inlets,canals,the Atlantic ocean within the territorial seas of the state of New York and
• Long-term use of equipment storage areas at or near highway maintenance all other bodies of surface water,natural or artificial,inland or coastal,fresh or salt,
facilities, public or private(except those private waters that do not combine or effect a junction
• Removal of sediment from the edge of the highway to restore a previously with natural surtace waters),which are wholly or partially within or bordering the state
existing sheet-flow drainage connection from the highway surtace to the or within its jurisdiction.Waters of the state are further defined in 6 NYCRR Parts 800 to
highway ditch or embankmen[, 941.
• F�cisting use of Canal Corp owned upland disposal sites for the canal,and
• Replacement of curbs,gutters,sidewalks and guide rail posts. Temporarily Ceased—means that an existing disturbed area will not be disturbed
again within 14 calendar days of the previous soil disturbance.
Site limitations—means site conditions that prevent the use of an infiltration technique
and or infiltration of the total WQv.Typical site limitations include:seasonal high Temporary Stabilization-means that exposed soil has been covered with material(s)
groundwater,shallow depth to bedrock,and soils with an infiltration rate less than 0.5 as set forth in the technical standard,New York Standards and Specifications for
inches/hour.The existence of site limitations shall be confirmed and documented using Erosion and Sediment Control,to prevent the exposed soil from eroding.The materials
actual field testing(i.e.test pits,soil borings,and infiltration test)or using information can include,but are not limited to,mulch,seed and mulch,and erosion control mats
from the most current United States Department of Agriculture(USDA)Soil Survey for (e.g.jute twisted yarn,excelsior wood fiber mats).
the County where the project is located.
Total Maximum Daily Loads(TMDLs)-A TMDL is the sum of the allowable loads of a
Sizing Criteria—means the criteria included in Part I.C.2 of the permit that are used to single pollutant from all contributing point and nonpoin[sources.It is a calculation of the
size post-construction stormwater management control practices.The criteria include; maximum amount of a pollutant that a waterbody can receive on a daily basis and still
Water Quality Volume(WQv),Runoff Reduction Volume(RRv),Channel Protection meet wa[erqualiry s[andards,and an allocation of that amount to the pollutanYs
Volume(Cpv),Overbank Flood(Qp),and Eutreme Flood(CIf). sources.A TMDL stipulates wasteload allocations(WLAs)for poin[source discharges,
load allocations(LAs)for nonpoin[sources,and a margin of safety(MOS).
State Pollutant Discharge Elimination System(SPDES)-means the system
established pursuant to Article 17 of the ECL and 6 NYCRR Part 750 for issuance of Trained Contractor-means an employee from the contracting(construction)company,
permits authorizing discharges to the waters of the state. identified in Part III.A.6.,that has received four(4)hours of Department endorsed
45 46
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training in proper erosion and sedimerit control principles from a Soil and Water AppENDIX B—Required SWPPP Components by Project Type
Conservation District,or other Department endorsed entity.After receiving the initial
training,the hained con[rac[or shall receive four(4)hours of training every three(3)
years. Table 1
Construction Activities that Require the Preparation of a SWPPP That Only
It can also mean an employee from the contracting(construction)company,identified in Includes Erosion and Sediment Controls
Part III.A.6.,that meets the qualified inspec[orqualifications(e.g.licensed Professional
Engineer,Certified Professional in Erosion and Sediment Control(CPESC),Registered The following construction activities that involve soil disturbances of one(1)or more acres of
Landscape Architect,New York State Erosion and Sediment Control Certificate land,but less than five(5)acres:
Program holder,or someone working under the direct supervision of,and at the same
COmpany as,the liCensed PfOfessi0nal Engineef Of Registefed LandsCape AfChiteCt, •Single family home not located in one ofthe watersheds listed in Appendix C or not directly
fOVided the haVe feCeiVed fOUf 4 hOUfS Of De aRment endOfsed tfainin In f0 ef dischargingto one ofthe 303(tl)segments listetl in Appentlix E
p Y � � p g p p •Single family residential subdivisions with 25°k or less impervious cover at total site builtl-out antl
efOsiOn and Sediment COntf01 pfinCiples ffOm a SOiI and Watef COnsefVatiOn DistfiCt,Of not located in one ofthe watersheds listed in Appendix C and not directly discharging to one ofthe
Othef DepaRment endOfsed entity). 303(d)segments listed in Appendix E
•Construction of a bam or other agncultural building,silq stock yartl or pen.
The[rained con[rac[or is responsible for the day to day implementation of the SWPPP.
Uniform Procedures Act(UPA)Permit-means a permit required under 6 NYCRR The following construction activi[ies[ha[involve soil tlis[urbances between five thousand(5000)
square feet and one(1)acre of land:
Part 621 of the Environmental Conservation Law(ECL),Article 70.
FUI construction activities locatetl in the watershetls itlentifetl in Appentlix D that involve soil
Watef QUality Standafd-means SUCh measUfes Of pUfity Of qUality fOf any Watefs in disturbances belween fve thousand(5,000)square feet and one(1)acre of land.
relation to their reasonable and necessary use as promulgated in 6 NYCRR Part 700 et
Seq. The following construction activities that involve soil disturbances of one(1)or more acres of
lantl:
•Installation of underground, linear utilities; such as gas lines, fiber-optic cable, cable N,
elecMq telephone,sewer mains,and water mains
•Environmental enhancement projects,such as wetlantl mitigation projects,stormwater retrofts antl
stream restoration projects
•Pond construction
•Linear bike paths running through areas with vegetative cover,including bike paths surfaced with an
impervious cover
•Cross-country ski trails and walking/hiking trails
•Sidewalk,bike path or walking path projects,surfaced with an impervious cover,that are not part of
resitlential,commercial or instiNtional tlevelopment;
•Sidewalk,bike path or walking path projects,surfaced with an impervious cover,that include
incitlental shoultler or curb work along an existing highway to support constmction ofthe sidewalk,
bike path orwalking path.
•Slope stabilization projects
•Slope flattening that changes the grade ofthe site,but does not significantly change the runoff
charactenstics
47 48
Appendix B Appendix B
T2b10 1(COf1tIf1U0dJ CONS7F2UCTION ACTVITES 7HAT REQUIRE 7HE PREPARATION OF A T2b10 2
SWPPP CONS7F2UCTON ACTVITIES TiAT REQUIRE THE PREPARATION OFA SWPPP THAT INCLUDES
THAT ONLY INCLUDES EROSION AND SEDIMENT CONTROLS POST-CONSTRUCTON STORNMIAlER MANAGEMENT PRACTICES
The following construction activities that involve soil disturbances of one(1)or more acres of
land: The following construction activities that involve soil disturbances of one(1)or more acres of
lantl:
•Spoil areas that will be covered with vegetation
• Vegetatetl open space projects(i.e.recreational parks,lawns,meatlows,feltls,tlownhill ski trails) • Single family home located in one of the watersheds listed in Appendix C or directly discharging to
exclutling projects that atter hydrology from pre to post development contlitions, one of the 303(d)segments listed in Appendix E
•Athletic feltls(natural grass)that tlo not inclutle the construction or reconstruction of impervious • Single family home that disNrbs five(5)or more acres of lantl
area and do not atter hydrology from pre to post development conditions • Single family residential subdivisions located in one of the watersheds listed in Appendix C or
•Demolition project where vegetation will be established,and no redevelopment is planned directly discharging to one of the 303(tl)segments listetl in Appentlix E
•Werhead electric transmission line project that tloes not include the construction of permanent • Single family residential subdivisions that involve soil disNrbances of between one(1)and fve(5)
access roads or parking areas surfaced with impervious cover acres of lantl with greater than 25%impervious cover at total site builtl-out
•Siructurel prectices as identifed in Table II in ihe"Agnculturel Management Prectices Catalog for • Single family residential subdivisions that involve soil disNrbances offve(5)or more acres of land,
Nonpoint Source Pollution in New York State",excluding projecis ihat involve soil disturbances of antl single family resitlential subtlivisions that involve soil tlisNrbances of less than five(5)acres
greater than five acres antl construction activities that inclutle the constmction or reconstruction of that are part of a larger common plan of development or sale that will ultimately disturb five or more
impervious area acres of land
•Temporary access roatls,metlian crossovers,tletour roatls,lanes,or othertemporary impervious • Multi-family residential developments;includes duplexes,townhomes,contlominiums,senior
areas that will be restoretl to pre-constmction contlitions once the construction activity is complete housing complexes,apartment complexes,and mobile home parks
• Airports
• Amusement parks
• Brewenes,citleries,antl wineries,inclutling establishments constructetl on agriculNral lantl
• Campgrounds
• Cemeteries that inclutle the construction or reconstruction of impervious area(>5 k of tlisNrbetl
area)or atterthe hydrology from pre to post development conditions
• Commercial tlevelopments
• Churches and other places ofworship
• Construction of a bam or other agncultural building(e.g.silo)antl strucNral practices as itlentifietl in
Table II in ihe"Agnculturel Management Prectices Catalog for NonpoiN Source Pollution in New
York State"ihat include ihe consimction or reconsimction of impervious area,excluding projects
that involve soil tlisNrbances of less than five acres.
• Golf courses
• Institutional tlevelopment;inclutles hospitals,pnsons,schools antl colleges
• Industnal facilities;includes industnal parks
• Lantlfills
• Municipal facilities;includes highway gareges,irensfer stations,office buildings,POTW's,water
treatment plants,antl water storage tanks
• Offce complexes
• Playgrountls that inclutle the construction or reconstruction of impervious area
• Sports complexes
• Racetracks;includes racetracks with earthen(dirt)surface
• Roatl construction or reconstmction,inclutling roatls constructed as part ofthe constmction
activities listetl in Table 1
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Table 2(Continued) APPENDIX C—Watersheds Requiring Enhanced Phosphorus Removal
CONS7F2UCTON ACTVITIES 7HAT REQUIRE THE PREPARATION OF A SWPPP THAT INCLUDES
POST-CONSTRUCTON STORNMIAlER MANAGEMENT PRACTICES Watersheds where owners or operators of construction activities identified in
Table 2 of Appendix B must prepare a SWPPP that includes post-construction
The following cons[ruc[ion ac[ivi[ies[ha[involve soil tlis[urbances of one(1)or more acres of stormwater management practices designed in conformance with the Enhanced
land:
Phosphorus Removal Standards included in the technical standard,New York
• Parking lot construction or reconstruction,inclutling parking lots constructetl as part ofthe State Stormwater Management Design Manual("Design Manual").
construction activities listed in Table 1
• Athletic feltls(natural grass)that inclutle the construction or reconstruction of impervious area(>5%
of disturbed area)or atterthe hydrology from pre to post development conditions •Enti�e New Yo�k City Watershed located east of the Hudson Rive�-Figu�e 1
• Athletic felds with artificial turf •OnOndaga Lake Watershed-FigUfe 2
• Permanent access roatls,parking areas,substations,compressor stations antl well tlnlling patls, •Gfeenwood Lake Watefshed-Figufe 3
surfaced with impervious cover.and constructed as part of an over-head electnc transmission line •OsCaWana Lake Watefshed—FigUfe 4
project,winbpower project,cell tower project,oil or gas well tlrilling project,sewer or water main •Kindefhook Lake Watefshed—Fi ufe 5
project or other linear utility project
• Sitlewalk,bike path or walking path projects,surtacetl with an impervious cover,that are part of a
residential,commercial or instiNtional development
• Sitlewalk,bike path or walking path projects,surtacetl with an impervious cover,that are part of a
highway constmction or reconstruction project
• All other construction activities that inclutle the construction or reconstruction of impervious area or
aRer the hydrology from pre to post development contlitions,antl are not listetl in Table 1
51 52
Appendix C Appendix C
Figure 1-New York City Watershed East of the Hudson Figure 2-Onondaga Lake Watershed
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nvva�d�;:c nvva�d�;:c
Figure 3-Greenwood Lake Watershed Figure 4-Oscawana Lake Watershed
PHILIPST�WIV
� WARWICK�r��--
f(ENT
PUT[�AM VALLEY
`� � j i
GREENWODD LAKE �
1 --OSCAWANA LA I(E
Phos��nnnis VJ.aler.shed
I If ;` rv�_�
l
CARIv1EL
�......_Plhosphorus Walershed
55 56
Appendix C
Fiqure 5-Kinderhook Lake Watershed APPENDIX D—Watersheds with Lower Disturbance Threshold
Watersheds where owners or operators of construction activities that involve soil
disturbances between five thousand(5000)square feet and one(1)acre of land
must obtain coverage under this permit.
snno uKe
EASi(:12EI_Nf3US1A r�.�
,��1 Entire New York City Watershed that is located east of the Hudson River-See Figure
r J 1 in Appendix C
�t �
Nnss.au
SCFiODRCK
� I NEWLEBAN
���
KINOERHOOKL
�� CHATHAM
GAN4.4N
VA1 R 11f
Town.villeae,u CRy 6auntlary for New lbrk Siate �q
o i i <u
LJ Kmticr�mk L&kc We[naM1ctl ' �
57 58
303(d)Segments Impaired by Construction Related Pollutant(s)
APPENDIX E—303(d)Segments Impaired by Construction Related Pollutant(s) ouechess Fall Kill and eri6s Nuerienrs
Dutchess Hillside Lake Nutrientr
List of 303(d)segments impaired by pollutants related to construction ectiviry(e.g.silt,sediment Dutchess Wappingers Lake Nutrienrs
or nutrients).The list was developed using"The Final New York State 2016 Section 303(d)List Dutchess Wappingers Lake 5ilt/5ediment
of Impaired Waters Requiring a TMDL/Other Strategy"dated November 2016.Owners or Erie Beeman Creek and tri6s Nutrienrs
operators of single family home and single family residential subdivisions with 25%or less total
impervious cover at total site build-out that involve soil disturbances of one or more acres of Erie Ellimtt Creek,Lower,and tri6s 5ilt/5ediment
land,but less than 5 acres,and directly discharge to one of the listed segments below shall Erie Ellimtt Creek,Lower,and tri6s Nutrients
prepare a SWPPP that includes post-construdion stormwater management prectices designed Erie Green Lake Nutrients
in conformance with the New York State Stormwater Management Design Manual("Design Erie Little 5ister Creek,Lower,and tri6s Nutrienrs
Manual"),dated January 2015. Erie MurderCreek,Lower,and tri6s Nutrienrs
Erie Rush Creek and tri6s Nutrients
Erie Scajaquada Creek,Lower,and tri6s Nutrientr
COUNTY WATERBODY POLLUTANT Erie Scajaquada Creek,Middle,and tri6s Nutrientr
Al6any Ann Lee(Shakers)Pond,Stump Pond Nutrientr Erie Scajaquada Creek,Upper,and tri6s Nutrientr
Al6any BasicCreekReservoir Nutrientr Erie SouthBranch5mokeCr,Lower,andtri6s Silt/Sediment
Allegany Amity Lake,Saunders Pond Nutrientr Erie South Branch Smoke Cr,Lower,and tri6s Nutrientr
Bronx Longlsland Sound,Bronx Nutrientr Essex Lake Champlain,Main Lake,South Nutrientr
Bronx VanCortlandtLake Nutrientr Essex LakeChamplain,5outhLake Nutrientr
Broome FlyPond,DeerLake,SkyLake Nutrientr Essex Wills6oroBay Nutrientr
Broome MinorTri6stoLowerSusquehanna(north) Nutrients Genesee BigelowCreekandtri6s Nutrientr
Broome WhitneyPointLake/Reserv Nutrients Genesee BlackCreek,Middle,andm ortri6s Nutrientr
Cattaraugus Allegheny River/Reservoir o Nutrients Genesee Black Creek,Upper,and m ortri6s Nutrientr
Genesee Bowen Brook and tri6s Nutrientr
Cattaraugus Beaver(Alma)Lake Nutrientr Genesee LeRoy Reservoir Nutrientr
Cattaraugus Case Lake Nutrientr
Cattaraugus Linlym/CIu6 Pond Nutrientr Genesee OakOrchard Cr,Upper,and tri6s Nutrientr
Ca Duck Lake Nutrients Genesee Tonawanda Creek,Middle,Main Stem Nutrientr
yuga Greene Schoharie Reservoir Silt/Sediment
Cayuga LittleSodusBay Nutrientr Greene SleepyHollowLake Silt/Sediment
Chautauqua BearLake Nutrientr Herkimer SteeleCreektri6s Silt/Sediment
Chautauqua ChadakoinRiverandtri6s Nutrientr Herkimer SteeleCreektri6s Nutrientr
Chautauqua Chautauqua Lake,North Nutrients Jefferson Moon Lake Nutrientr
Chautauqua Chautauqua Lake,South Nutrientr
Chautauqua FindleyLake Nutrients Kings HendrixCreek Nutrientr
Chautauqua Hul6urt/ClymerPond Nutrientr Kings ProspectParkLake Nutrientr
Clinton GreatChazy River,Lower,Main Stem Silt/Sediment Lewis Mill CreeWSouth Branch,and tri6s Nutrientr
Clinton Lake Champlain,Main Lake,Middle Nutrientr Livingston Christie Creek and tri6s Nutrientr
Clinton Lake Champlain,Main Lake,North Nutrients Livingston Conesus Lake Nutrientr
Colum6ia Kinderhook Lake Nutrients Livingston Mill Creek and minortri6s Silt/Sediment
Colum6ia Ro6insonPond Nutrientr Monroe BlackCreek,Lower,andm ortri6s Nutrientr
Monroe Buck Pond Nutrientr
Cortland DeanPond Nutrientr Monroe Cran6erryPond Nutrientr
59 60
303(d)Segments Impaired by Construction Related Pollutant(s) 303(d)Segments Impaired by Construction Related Pollutant(s)
Monroe Lake Ontario 5horeline,Westem Nutrients Onondaga Onondaga Lake,northem end Nutrientr
Monroe Long Pond Nutrientr Onondaga Onondaga Lake,southern end Nutrientr
Monroe MiIlCreekandtri6s Nutrients Ontario GreatBrookandminortri6s Silt/Sediment
Monroe MiIlCreek/BluePondOuHetandtri6s Nutrients Ontario GreatBrookandminortri6s Nutrientr
Monroe MinorTri6stolrondequoitBay Nutrientr Ontario HemlockLakeOuHetandminortri6s Nutrientr
Monroe RochesterEmbayment-East Nutrientr Ontario HoneoyeLake Nutrientr
Monroe RochesterEmbayment-West Nutrientr Orange GreenwoodLake Nutrientr
Monroe Ship6uildersCreekandtri6s Nutrients Orange MonhagenBrookandtri6s Nutrientr
Monroe ThomasCreeWWhiteBrookandtri6s Nutrients Orange OrangeLake Nutrientr
Nassau BeaverLake Nutrients Orleans LakeOntario5horeline,Westem Nutrientr
Nassau CamaansPond Nutrientr Orleans LakeOntario5horeline,Westem Nutrientr
Nassau EastMeadow Brook,Upper,and tri6s Silt/Sediment Oswego Lake Neatahwanta Nutrientr
Nassau EastRockawayChannel Nutrientr Oswego PleasantLake Nutrientr
Nassau GrantParkPond Nutrients Putnam BogBrookReservoir Nutrients
Nassau Hempstead Bay Nutrientr Putnam Boyd Corners Reservoir Nutrientr
Nassau Hempstead Lake Nutrientr Putnam Croton Falls Reservoir Nutrientr
Nassau HewlettBay Nutrientr Putnam DivertingReservoir Nutrientr
Nassau HoglslandChannel Nutrientr Putnam EastBranchReservoir Nutrientr
Nassau Longlsland 5ound,Nassau County Waters Nutrientr Putnam Lake Carmel Nutrientr
Nassau MassapequaCreekandtri6s Nutrientr Putnam MiddleBranchReservoir Nutrientr
Nassau Mil6um/ParsonageCreeks,Upp,andtri6s Nutrientr Putnam OscawanaLake Nutrientr
Nassau ReynoldsChannel,west Nutrientr Putnam PalmerLake Nutrientr
Nassau TidalTri6stoHempsteadBay Nutrients Putnam WestBranchReservoir Nutrientr
Nassau Tri6s(fresh)to EastBay Nutrients Queens Bergen Basin Nutrientr
Nassau Tri6s(fresh�toEastBay Silt/Sediment Queens FlushingCreek/Bay Nutrientr
Nassau Tri6sto5mith/HaIlsPonds Nutrientr Queens JamaicaBay,Eastem,andtri6s(Queens) Nutrientr
Nassau WoodmereChannel Nutrientr queens KissenaLake Nutrientr
NewVork HarlemMeer Nutrientr Queens MeadowLake Nutrientr
NewVork TheLakeinCentralPark Nutrientr queens WillowLake Nutrientr
Niagara BergholtzCreekandtri6s Nutrientr Rensselaer NassauLake Nutrientr
Niagara HydeParkLake Nutrients Rensselaer SnydersLake Nutrientr
Niagara LakeOntario5horeline,Westem Nutrients Richmond GrasmereLake/BradysPond Nutrientr
Niagara LakeOntario5horeline,Westem Nutrients Rockland CongersLake,SwartoutLake Nutrientr
Oneida Ballou,Nail Creeks and tri6s Nutrients Rockland Rockland Lake Nutrients
Onondaga Har6orBrook,Lower,andtri6s Nutrients Saratoga BallstonLake Nutrientr
Onondaga LeyCreekandtri6s Nutrientr Saratoga DwaasKillandtri6s Silt/Sediment
Onondaga MinorTri6stoOnondagaLake Nutrientr Saratoga DwaasKillandtri6s Nutrientr
Onondaga Ninemile Creek,Lower,and tri6s Nutrientr Saratoga Lake Lonely Nutrientr
Onondaga Onondaga Creek,Lower,and tri6s Nutrientr Saratoga Round Lake Nutrientr
Onondaga OnondagaCreek,Middle,andtri6s Nutrients Sararoga Tri6sroLakeLonely Nutrients
61 62
303(d)Segments Impaired by Construction Related Pollutant(s) 303(d)Segments Impaired by Construction Related Pollutant(s)
Schenectady CollinsLake Nutrientr Warren Huddle/FinkleBrooksandtri6s Silt/Sediment
Schenectady DuaneLake Nutrientr Warren IndianBrookandtri6s Silt/Sediment
Schenectady MariavilleLake Nutrientr Warren LakeGeorge Silt/Sediment
Schoharie EnglevillePond Nutrientr Warren Tri6stoLGeorge,VillageofLGeorge Silt/Sediment
Schoharie SummitLake Nutrientr Washington CossayunaLake Nutrientr
Seneca ReederCreekandtri6s Nutrientr Washington LakeChamplain,5outhBay Nutrientr
StLawrence BlackLakeOuHet/BlackLake Nutrientr Washington Tri6stoLGeorge,EastShore Silt/Sediment
StLawrence Fish Creek and minortri6s Nutrientr Washington Wood Cr/Champlain Canal and minortri6s Nutrientr
Steu6en SmithPond Nutrientr Wayne PortBay Nutrientr
Suffolk Agawam Lake Nutrients Westchester Amawalk Reservoir Nutrients
Suffolk Big/Little Fresh Ponds Nutrients Westchester Blind Brook,Upper,and tri6s Silt/Sediment
Suffolk CanaanLake Silt/Sediment Westchester CrossRiverReservoir Nutrientr
Suffolk Canaan Lake Nutrientr Westchester Lake Katonah Nutrientr
Suffolk Flanders Bay,West/LowerSawmill Creek Nutrientr Westchester Lake Linmindale Nutrientr
Suffolk Fresh Pond Nutrientr Westchester Lake Meahagh Nutrientr
Suffolk GreatSouth Bay,East Nutrients Westchester Lake Mohegan Nutrientr
Suffolk GreatSouthBay,Middle Nutrients Westchester LakeShenorock Nutrientr
Suffolk Great 5outh Bay,West Nutrientr Westchester Long Island 5ound,Westchester(East) Nutrientr
Suffolk Lake Ronkonkoma Nutrientr Westchester Mamaroneck River,Lower Silt/Sediment
Suffolk Longlsland5ound,SuffolkCounty,West Nutrientr Westchester MamaroneckRiver,Upper,andminortri6s Silt/Sediment
Suffolk Mattituck(Marratooka)Pond Nutrients Westchester Musmot/UpperNewCroton Reservoir Nutrientr
Suffolk Meetinghouse/TerrysCreeksandtri6s Nutrients Westchester NewCrotonReservoir Nutrientr
Suffolk Mill and Seven Ponds Nutrientr Westchester Peach Lake Nutrientr
Suffolk MillersPond Nutrientr Westchester ReservoirNo.l(Lakelsle) Nutrientr
Suffolk Moriches Bay,East Nutrientr Westchester Saw Mill River,Lower,and tri6s Nutrientr
Suffolk Moriches Bay,West Nutrients Westchester Saw Mill River,Middle,and tri6s Nutrientr
Suffolk PemnicRiver,Lower,andtidaltri6s Nutrients Westchester SheldrakeRiverandtri6s Silt/Sediment
Suffolk quantuckBay Nutrients Westchester SheldrakeRiverandtri6s Nutrients
Suffolk ShinnecockBayandlnlet Nutrients Westchester SilverLake Nutrientr
Suffolk Tidal tri6s to West Moriches Bay Nutrients Westchester Teatown Lake Nutrientr
Sullivan Bodine,Montgomery Lakes Nutrients Westchester Titicus Reservoir Nutrientr
Sullivan DaviesLake Nutrients Westchester TruesdaleLake Nutrientr
Sullivan EvensLake Nutrients Westchester WallacePond Nutrientr
Sullivan PleasureLake Nutrients Wyoming JavaLake Nutrientr
Tompkins Cayuga Lake,Southem End Nutrients Wyoming Silver Lake Nutrientr
Tompkins Cayuga Lake,Southem End Silt/Sediment
Tompkins Owasminlet,Upper,andtri6s Nutrients
Ulster Ashokan Reservoir Silt/Sediment
Ulster EsopusCreek,Upper,andminortri6s Silt/Sediment
Warren HagueBrookandtri6s Silt/Sediment
63 64
APPENDIX F—List of NYS DEC Regional Offices
SOQaaERono SOQaaERono
� Nn5i4unrvoSUFw�x STorvvBaoox,Nr11]90 SiorvvBaoox,Nr11]90-3409
TE�.(631)444d%5 TE�.(631)444d405
1Hunitx�P�iniP�a[n, 1Hunitx�P�iniP�atn,
2 Bx�nx,Kin��,NewV�xn, 4]-0021�iSi. 4]-0021�iSi.
Quttn�auuRi�nm�nu L�nt;I��nnuQir,Nr111 01-5 4 01 L�nt;IxnnuQir,Nr111 01-5 4 01
TE�.(/18)482-099] TE�.(/18)482-0933
DuicxE55,Onnrv�E,Puirvnm, 21SouixPuiiCoarvEaSRono 100Hiu5mEAVFrvuE,Suih1w
3 R��n�nnu,Su��ivnn,Uuitx NtwPn�it,Nr1 25 61-16 9 6 WniitP�nin�,M'106W
nrvoWEsicxEsha TE�.(845)2563059 TE�.(914)428-2505
A�anrvv,Cowmaw,
DE�nwnaE,GaEErvE, 1150NoaixWESrcoiiRono 1130NoaixWESicoiiRono
Q Morvi�omEav,OisE�o, ScxErvEcrnov,Nv 1230G-2014 ScxErvEcrnov,Nv 12306-2(114
RErv55E�nEa,ScxErvEcrnov TE�.(518)%]-20G9 TE�.(518)35]-2045
nrvo ScxoxnaiE
Qirviorv,E55Ex,Fanrvx�irv, ���SSinhRouiE�,POBoxD6 232Go�FCouaSERono
5 Fu�iorv,Htwti�iorv, qpygaoox,Nv129T1-0296 WnaaErvSaua�,Nv12�5-11]2 TE�.
Sannio�n,WanaErvnrvo ���518)�]-1234 (518)623-1200
Wnsxirv�iorv
HERKIMER,JEFFERSON, STATEOFFICEBUILDING STATEOFFICEBUILDING
6 LEWIS,ONEIDAAND 31]WASHINGTONSTREET 20]GENESEESTREEf
ST.LAWRENCE WATERTOWN,NY 13601318] IJrICA,NY 13501-2�5 TEL.(315)
TEL(315)]85-?245 ]93-2554
BROOME,CAVUGA,
CHENANGO,CORTLAND, 615 ERIE BLVD.WEST 615 ERIE BLVD.WEST
] MADISON,ONONDAGlS SVRACUSE,NY 132(14-2400 SVRACUSE,NV 1320.1-2400
OSWEGO,TIOGAAND TEL(315)426-]438 TEL.(315)426-]500
TOMPKINS
CHEMUNG,GENESEE,
LIVINGSTON,MONROE, 62'14EASTAVON-LIMA 62]4EASTAVON-LIMARD.
$ OMARIO,ORLEANS, ROADAVON,NY 144149519 AVON,NV 1 4 41 4 9 519
SCHUYLER SENECA, �L(585)226-?A66 TEL.(5�)?26-24G6
STEUBEN,WAVNE AND
VATES
ALLEGANV, Z�pMICHIGANAVENUE 2]OMICHIGANAVENUE
9 CATTARAUGUS, gUFFALO,NY 142(13-2999 BUFFALO,NY14203-2999
CHAUTAUQUA,ERIE, �L(]16)851-]165 TEL.(/16)�1-]0'10
NIAGARA AND W VOMING
65
Appendix E
NYS OPRHP Documentation
Stormwater Pollution Prevention Plan (SWPPP) E
26 Freedom Way February 2021
M�wvoRK p�rks Recreation
sr�tTE v� r a
annoar�r�irv and Historic Preser�rration
ANDREW M. CUOMO ERIK KULLESEID
Governor Commissioner
February 17, 2021
Brian Sipperly
Principal Project Manager
Verity Engineering, D.P.C.
P.O. Box 474
Troy, NY 12181
Re: DEC
AgroChem Warehouse Expansion
26 Freedom Way, Saratoga Springs, NY 12866
21 PR00942
Dear Brian Sipperly:
Thank you for requesting the comments of the Office of Parks, Recreation and Historic
Preservation (OPRHP). We have reviewed the project in accordance with the New York State
Historic Preservation Act of 1980 (Section 14.09 of the New York Parks, Recreation and
Historic Preservation Law). These comments are those of the OPRHP and relate only to
Historic/Cultural resources. They do not include potential environmental impacts to New York
State Parkland that may be involved in or near your project. Such impacts must be considered
as part of the environmental review of the project pursuant to the State Environmental Quality
Review Act (New York Environmental Conservation Law Article 8) and its implementing
regulations (6 NYCRR Part 617).
Based upon this review, it is the opinion of OPRHP that no properties, including archaeological
and/or historic resources, listed in or eligible for the New York State and National Registers of
Historic Places will be impacted by this project.
If further correspondence is required regarding this project, please be sure to refer to the
OPRHP Project Review (PR) number noted above.
Sincerely,
�
� �r�
� �
R. Daniel Mackay
Deputy Commissioner for Historic Preservation
Division for Historic Preservation
Division for Historic Preservation
P.O. Box 189,Waterford, New York 1 21 88-01 89•(518)237-8643•parks.ny.gov
"E����� P�rks, Recr�ativn,
a�Po��r�crir�r �11C� �I��OCI� �f�S�'fV�tl�C311
ANDREW M.CUC1M0 ROSE HAR�IEY
Governar Commissioner
August 04, 2015
Mr. THOMAS NACE
Nace Engineering, PC
169 Haviland Road
Queensbury, NY 12804
Re: DEC
AgroChem Farm and Dairy Products
duplainville road at caddy hill blvd., saratoga springs, NY
15PR04252 �
Dear Mr. NACE:
Thank you for requesting the comments of the Office of Parks, Recreation and Historic
Preservation (OPRHP). We have reviewed the project in accordance with the New York State
Historic Preservation Act of 1980 (Section 14.09 of the New York Parks, Recreation and
Historic Preservation Law). These comments are those of the OPRHP and relate only to
Historic/Cultural resources. They do not include potential environmental impacts to New York
State Parkland that may be involved in or near your project. Such impacts must be considered
as part of the environmental review of the project pursuant to the State Environmental Quality
Review Act (New York Environmental Conservation Law Article 8) and its implementing
regulations (6 NYCRR Part 617).
Based upon this review, it is the New York State Office of Parks, Recreation and Historic
Preservation's opinion that your project will have no impact on archaeological and/or historic
resources listed in or eligible for the New York State and National Registers of Historic Places.
If further correspondence is required regarding thls proJect, please be sure to refer to the
OPRHP Project Review (PR) number noted above.
Sincerely,
����s
Ruth L. Pierpont
Deputy Commissioner for Historic Preservation
Qivision fc�r Historic Preservation
P.O.Box t�9,�Naterford,Netiv York t2183-�189•(518)237-&643•ww�,v.nysparks.com
Appendix F
USDA and NCRS Soil Survey
Stormwater Pollution Prevention Plan (SWPPP) F
26 Freedom Way February 2021
USDA United States A product ofthe National Custom Soil Resource
= Department of Cooperative Soil Survey,
Agriculture a joint effort of the United Report for
n I ^�� States Department of
I V I� Agriculture and other S a rato g a
Federal agencies, State
Natural agencies including the
Resources Agricultural Experiment �O u ���' ���
Conservation Stations, and local
Service participants
Yo rk
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- A �. �.� � ., � �,
December 15, 2020
P reface
Soil surveys contain information that affects land use planning in survey areas.
They highlight soil limitations that affect various land uses and provide information
about the properties of the soils in the survey areas. Soil surveys are designed for
many different users, including farmers, ranchers, foresters, agronomists, urban
planners, community officials, engineers, developers, builders, and home buyers.
Also, conservationists, teachers, students, and specialists in recreation, waste
disposal, and pollution control can use the surveys to help them understand,
protect, or enhance the environment.
Various land use regulations of Federal, State, and local governments may impose
special restrictions on land use or land treatment. Soil surveys identify soil
properties that are used in making various land use or land treatment decisions.
The information is intended to help the land users identify and reduce the effects of
soil limitations on various land uses. The landowner or user is responsible for
identifying and complying with existing laws and regulations.
Although soil survey information can be used for general farm, local, and wider area
planning, onsite investigation is needed to supplement this information in some
cases. Examples include soil quality assessments (http://www.nres.usda.gov/wps/
portal/nres/main/soils/health/) and certain conservation and engineering
applications. For more detailed information, contact your local USDA Service Center
(https://offices.sc.egov.usda.gov/locator/app?agency=nres) or your NRCS State Soil
Scientist (http://www.nres.usda.gov/wps/portal/nres/detail/soils/contactus/?
cid=nres142p2_053951).
Great differences in soil properties can occur within short distances. Some soils are
seasonally wet or subject to flooding. Some are too unstable to be used as a
foundation for buildings or roads. Clayey or wet soils are poorly suited to use as
septic tank absorption fields. A high water table makes a soil poorly suited to
basements or underground installations.
The National Cooperative Soil Survey is a joint effort of the United States
Department of Agriculture and other Federal agencies, State agencies including the
Agricultural Experiment Stations, and local agencies. The Natural Resources
Conservation Service (NRCS) has leadership for the Federal part of the National
Cooperative Soil Survey.
Information about soils is updated periodically. Updated information is available
through the NRCS Web Soil Survey, the site for official soil survey information.
The U.S. Department of Agriculture (USDA) prohibits discrimination in all its
programs and activities on the basis of race, color, national origin, age, disability,
and where applicable, sex, marital status, familial status, parental status, religion,
sexual orientation, genetic information, political beliefs, reprisal, or because all or a
part of an individual's income is derived from any public assistance program. (Not
all prohibited bases apply to all programs.) Persons with disabilities who require
2
alternative means for communication of program information (Braille, large print,
audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice
and TDD). To file a complaint of discrimination, write to USDA, Director, Office of
Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or
call (800) 795-3272 (voice) or(202) 720-6382 (TDD). USDA is an equal opportunity
provider and employer.
3
Contents
Preface....................................................................................................................2
How Soil Surveys Are Made..................................................................................5
SoilMap.................................................................................................................. 8
SoilMap................................................................................................................9
Legend................................................................................................................10
MapUnit Legend................................................................................................ 11
MapUnit Descriptions.........................................................................................11
Saratoga County, New York............................................................................13
WnB—Wndsor loamy sand, 3 to 8 percent slopes.....................................13
Soil Information for All Uses...............................................................................15
Soil Properties and Qualities.............................................................................. 15
Soil Qualities and Features.............................................................................15
HydrologicSoil Group................................................................................. 15
References............................................................................................................20
4
How Soil Surveys Are Made
Soil surveys are made to provide information about the soils and miscellaneous
areas in a specific area. They include a description of the soils and miscellaneous
areas and their location on the landscape and tables that show soil properties and
limitations affecting various uses. Soil scientists observed the steepness, length,
and shape of the slopes; the general pattern of drainage; the kinds of crops and
native plants; and the kinds of bedrock. They observed and described many soil
profiles. A soil profile is the sequence of natural layers, or horizons, in a soil. The
profile extends from the surface down into the unconsolidated material in which the
soil formed or from the surface down to bedrock. The unconsolidated material is
devoid of roots and other living organisms and has not been changed by other
biological activity.
Currently, soils are mapped according to the boundaries of major land resource
areas (MLRAs). MLRAs are geographically associated land resource units that
share common characteristics related to physiography, geology, climate, water
resources, soils, biological resources, and land uses (USDA, 2006). Soil survey
areas typically consist of parts of one or more MLRA.
The soils and miscellaneous areas in a survey area occur in an orderly pattern that
is related to the geology, landforms, relief, climate, and natural vegetation of the
area. Each kind of soil and miscellaneous area is associated with a particular kind
of landform or with a segment of the landform. By observing the soils and
miscellaneous areas in the survey area and relating their position to specific
segments of the landform, a soil scientist develops a concept, or model, of how they
were formed. Thus, during mapping, this model enables the soil scientist to predict
with a considerable degree of accuracy the kind of soil or miscellaneous area at a
specific location on the landscape.
Commonly, individual soils on the landscape merge into one another as their
characteristics gradually change. To construct an accurate soil map, however, soil
scientists must determine the boundaries between the soils. They can observe only
a limited number of soil profiles. Nevertheless, these observations, supplemented
by an understanding of the soil-vegetation-landscape relationship, are sufficient to
verify predictions of the kinds of soil in an area and to determine the boundaries.
Soil scientists recorded the characteristics of the soil profiles that they studied. They
noted soil color, texture, size and shape of soil aggregates, kind and amount of rock
fragments, distribution of plant roots, reaction, and other features that enable them
to identify soils. After describing the soils in the survey area and determining their
properties, the soil scientists assigned the soils to taxonomic classes (units).
Taxonomic classes are concepts. Each taxonomic class has a set of soil
characteristics with precisely defined limits. The classes are used as a basis for
comparison to classify soils systematically. Soil taxonomy, the system of taxonomic
classification used in the United States, is based mainly on the kind and character
of soil properties and the arrangement of horizons within the profile. After the soil
5
Custom Soil Resource Report
scientists classified and named the soils in the survey area, they compared the
individual soils with similar soils in the same taxonomic class in other areas so that
they could confirm data and assemble additional data based on experience and
research.
The objective of soil mapping is not to delineate pure map unit components; the
objective is to separate the landscape into landforms or landform segments that
have similar use and management requirements. Each map unit is defined by a
unique combination of soil components and/or miscellaneous areas in predictable
proportions. Some components may be highly contrasting to the other components
of the map unit. The presence of minor components in a map unit in no way
diminishes the usefulness or accuracy of the data. The delineation of such
landforms and landform segments on the map provides sufficient information for the
development of resource plans. If intensive use of small areas is planned, onsite
investigation is needed to define and locate the soils and miscellaneous areas.
Soil scientists make many field observations in the process of producing a soil map.
The frequency of observation is dependent upon several factors, including scale of
mapping, intensity of mapping, design of map units, complexity of the landscape,
and experience of the soil scientist. Observations are made to test and refine the
soil-landscape model and predictions and to verify the classification of the soils at
specific locations. Once the soil-landscape model is refined, a significantly smaller
number of ineasurements of individual soil properties are made and recorded.
These measurements may include field measurements, such as those for color,
depth to bedrock, and texture, and laboratory measurements, such as those for
content of sand, silt, clay, salt, and other components. Properties of each soil
typically vary from one point to another across the landscape.
Observations for map unit components are aggregated to develop ranges of
characteristics forthe components. The aggregated values are presented. Direct
measurements do not exist for every property presented for every map unit
component. Values for some properties are estimated from combinations of other
properties.
While a soil survey is in progress, samples of some of the soils in the area generally
are collected for laboratory analyses and for engineering tests. Soil scientists
interpret the data from these analyses and tests as well as the field-observed
characteristics and the soil properties to determine the expected behavior of the
soils under different uses. Interpretations for all of the soils are field tested through
observation of the soils in different uses and under different levels of management.
Some interpretations are modified to fit local conditions, and some new
interpretations are developed to meet local needs. Data are assembled from other
sources, such as research information, production records, and field experience of
specialists. For example, data on crop yields under defined levels of management
are assembled from farm records and from field or plot experiments on the same
kinds of soil.
Predictions about soil behavior are based not only on soil properties but also on
such variables as climate and biological activity. Soil conditions are predictable over
long periods of time, but they are not predictable from year to year. For example,
soil scientists can predict with a fairly high degree of accuracy that a given soil will
have a high water table within certain depths in most years, but they cannot predict
that a high water table will always be at a specific level in the soil on a specific date.
After soil scientists located and identified the significant natural bodies of soil in the
survey area, they drew the boundaries of these bodies on aerial photographs and
6
Custom Soil Resource Report
identified each as a specific map unit. Aerial photographs show trees, buildings,
fields, roads, and rivers, all of which help in locating boundaries accurately.
7
Soil Map
The soil map section includes the soil map for the defined area of interest, a list of
soil map units on the map and extent of each map unit, and cartographic symbols
displayed on the map. Also presented are various metadata about data used to
produce the map, and a description of each soil map unit.
8
Custom Soil Resource Report
� Soil Map �
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9
Custom Soil Resource Report
MAP LEGEND MAP INFORMATION
Area of Interest(AOI) Spoil Area The soil surveys that comprise your AOI were mapped at
Area of Interest(AOI) 1 24,000.
. Stony Spot
Soils Very Stony Spot
Soil Map Unit Polygons Warning:Soil Map may not be valid at this scale.
� Wet Spot
� � Soil Map Unit Lines Enlargement of maps beyond the scale of mapping can cause
Other misunderstandin of the detail of ma in and accurac of soil
0 Soil Map Unit Points 9 pp 9 Y
,. Special Line Features line placement.The maps do not show the small areas of
Special Point Features contrasting soils that could have been shown at a more detailed
� Blowout Water Features sCale.
Streams and Canals
� Borrow Pit
Transportation Please rely on the bar scale on each map sheet for map
�� Clay Spot Rails measurements.
�-�-+
Closed Depression
� Interstate Highways
Source of Map: Natural Resources Conservation Service
Gravel Pit US Routes Web Soll Sulvey URL:
Gravelly Spot Coordinate System: Web Mercator(EPSG3857)
Major Roads
Landfill Local Roads Maps from the Web Soil Survey are based on the Web Mercator
� Lava Flow gackground projection,which preserves direction and shape but distorts
distance and area.A projection that preserves area,such as the
^ Marsh or swamp Aerial Photography Albers equal-area conic projection,should be used if more
- Mine or Quarry accurate calculations of distance or area are required.
Miscellaneous Water This product is generated from the USDA-NRCS certified data as
Perennial Water of the version date(s)listed below.
Rock outcrop Soil Survey Area: Saratoga County, New York
..� Saline Spot Survey Area Data: Version 20,Jun 11,2020
Sandy Spot Soil map units are labeled(as space allows)for map scales
_ Severely Eroded Spot 1:50,000 or larger.
Sinkhole Date(s)aerial images were photographed: Oct 7,2013—Nov 9,
- Slide or Slip 2016
oa Sodic Spot The orthophoto or other base map on which the soil lines were
compiled and digitized probably differs from the background
imagery displayed on these maps.As a result,some minor
shifting of map unit boundaries may be evident.
10
Custom Soil Resource Report
Map Unit Legend
Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI
WnB Windsor loamy sand,3 to 8 33.7 100.0°k
percent slopes
Totals for Area of Interest 33.7 100.0%
Map Unit Descriptions
The map units delineated on the detailed soil maps in a soil survey represent the
soils or miscellaneous areas in the survey area. The map unit descriptions, along
with the maps, can be used to determine the composition and properties of a unit.
A map unit delineation on a soil map represents an area dominated by one or more
major kinds of soil or miscellaneous areas. A map unit is identified and named
according to the taxonomic classification of the dominant soils. Wthin a taxonomic
class there are precisely defined limits for the properties of the soils. On the
landscape, however, the soils are natural phenomena, and they have the
characteristic variability of all natural phenomena. Thus, the range of some
observed properties may extend beyond the limits defined for a taxonomic class.
Areas of soils of a single taxonomic class rarely, if ever, can be mapped without
including areas of other taxonomic classes. Consequently, every map unit is made
up of the soils or miscellaneous areas for which it is named and some minor
components that belong to taxonomic classes other than those of the major soils.
Most minor soils have properties similar to those of the dominant soil or soils in the
map unit, and thus they do not affect use and management. These are called
noncontrasting, or similar, components. They may or may not be mentioned in a
particular map unit description. Other minor components, however, have properties
and behavioral characteristics divergent enough to affect use or to require different
management. These are called contrasting, or dissimilar, components. They
generally are in small areas and could not be mapped separately because of the
scale used. Some small areas of strongly contrasting soils or miscellaneous areas
are identified by a special symbol on the maps. If included in the database for a
given area, the contrasting minor components are identified in the map unit
descriptions along with some characteristics of each. A few areas of minor
components may not have been observed, and consequently they are not
mentioned in the descriptions, especially where the pattern was so complex that it
was impractical to make enough observations to identify all the soils and
miscellaneous areas on the landscape.
The presence of minor components in a map unit in no way diminishes the
usefulness or accuracy of the data. The objective of mapping is not to delineate
pure taxonomic classes but rather to separate the landscape into landforms or
landform segments that have similar use and management requirements. The
delineation of such segments on the map provides sufficient information for the
development of resource plans. If intensive use of small areas is planned, however,
onsite investigation is needed to define and locate the soils and miscellaneous
areas.
11
Custom Soil Resource Report
An identifying symbol precedes the map unit name in the map unit descriptions.
Each description includes general facts about the unit and gives important soil
properties and qualities.
Soils that have profiles that are almost alike make up a soil series. Except for
differences in texture of the surface layer, all the soils of a series have major
horizons that are similar in composition, thickness, and arrangement.
Soils of one series can differ in texture of the surface layer, slope, stoniness,
salinity, degree of erosion, and other characteristics that affect their use. On the
basis of such differences, a soil series is divided into soil phases. Most of the areas
shown on the detailed soil maps are phases of soil series. The name of a soil phase
commonly indicates a feature that affects use or management. For example, Alpha
silt loam, 0 to 2 percent slopes, is a phase of the Alpha series.
Some map units are made up of two or more major soils or miscellaneous areas.
These map units are complexes, associations, or undifferentiated groups.
A complex consists of two or more soils or miscellaneous areas in such an intricate
pattern or in such small areas that they cannot be shown separately on the maps.
The pattern and proportion of the soils or miscellaneous areas are somewhat similar
in all areas. Alpha-Beta complex, 0 to 6 percent slopes, is an example.
An association is made up of two or more geographically associated soils or
miscellaneous areas that are shown as one unit on the maps. Because of present
or anticipated uses of the map units in the survey area, it was not considered
practical or necessary to map the soils or miscellaneous areas separately. The
pattern and relative proportion of the soils or miscellaneous areas are somewhat
similar. Alpha-Beta association, 0 to 2 percent slopes, is an example.
An undifferentiated group is made up of two or more soils or miscellaneous areas
that could be mapped individually but are mapped as one unit because similar
interpretations can be made for use and management. The pattern and proportion
of the soils or miscellaneous areas in a mapped area are not uniform. An area can
be made up of only one of the major soils or miscellaneous areas, or it can be made
up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example.
Some surveys include miscellaneous areas. Such areas have little or no soil
material and support little or no vegetation. Rock outcrop is an example.
12
Custom Soil Resource Report
Saratoga County, New York
WnB—Windsor loamy sand, 3 to 8 percent slopes
Map Unit Setting
National map unit symbol: 2svkf
Elevation: 0 to 1,210 feet
Mean annual precipitation: 36 to 71 inches
Mean annual airtemperature: 39 to 55 degrees F
Frost-free period: 140 to 240 days
Farmland classification: Farmland of statewide importance
Map Unit Composition
�ndsor, loamy sand, and similar soils: 85 percent
Minor components: 15 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Windsor, Loamy Sand
Setting
Landform: Outwash terraces, deltas, outwash plains, dunes
Landform position (three-dimensional):Tread, riser
Down-slope shape: Linear, convex
Across-slope shape: Linear, convex
Parent material: Loose sandy glaciofluvial deposits derived from granite and/or
loose sandy glaciofluvial deposits derived from schist and/or loose sandy
glaciofluvial deposits derived from gneiss
Typical profile
O-0 to 1 inches: moderately decomposed plant material
A - 1 to 3 inches: loamy sand
Bw-3 to 25 inches: loamy sand
C-25 to 65 inches: sand
Properties and qualities
Slope: 3 to 8 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Excessively drained
Runoff class: Low
Capacity of the most limiting layer to transmit water(Ksat): Moderately high to very
high (1.42 to 99.90 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Maximum salinity: Nonsaline (0.0 to 1.9 mmhos/cm)
Available water capacity: Low (about 4.5 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 2s
Hydrologic Soil Group: A
Ecological site: F144AY022MA- Dry Outwash
Hydric soil rating: No
13
Custom Soil Resource Report
Minor Components
Hinckley, loamy sand
Percent of map unit: 10 percent
Landform: Outwash plains, eskers, kames, deltas
Landform position (two-dimensional): Summit, shoulder, backslope
Landform position (three-dimensional): Nose slope, side slope, crest, head slope,
rise
Down-slope shape: Convex
Across-slope shape: Linear, convex
Hydric soil rating: No
Deerfield, loamy sand
Percent of map unit: 5 percent
Landform:Terraces, deltas, outwash plains
Landform position (two-dimensional): Footslope
Landform position (three-dimensional):Tread, talf
Down-slope shape: Linear
Across-slope shape: Linear
Hydric soil rating: No
14
Soil Information for All Uses
Soil Properties and Qualities
The Soil Properties and Qualities section includes various soil properties and
qualities displayed as thematic maps with a summary table for the soil map units in
the selected area of interest. A single value or rating for each map unit is generated
by aggregating the interpretive ratings of individual map unit components. This
aggregation process is defined for each property or quality.
Soil Qualities and Features
Soil qualities are behavior and performance attributes that are not directly
measured, but are inferred from observations of dynamic conditions and from soil
properties. Example soil qualities include natural drainage, and frost action. Soil
features are attributes that are not directly part of the soil. Example soil features
include slope and depth to restrictive layer. These features can greatly impact the
use and management of the soil.
Hydrologic Soil Group
Hydrologic soil groups are based on estimates of runoff potential. Soils are
assigned to one of four groups according to the rate of water infiltration when the
soils are not protected by vegetation, are thoroughly wet, and receive precipitation
from long-duration storms.
The soils in the United States are assigned to four groups (A, B, C, and D) and
three dual classes (A/D, B/D, and C/D). The groups are defined as follows:
Group A. Soils having a high infiltration rate (low runoff potential)when thoroughly
wet. These consist mainly of deep, well drained to excessively drained sands or
gravelly sands. These soils have a high rate of water transmission.
Group B. Soils having a moderate infiltration rate when thoroughly wet. These
consist chiefly of moderately deep or deep, moderately well drained or well drained
soils that have moderately fine texture to moderately coarse texture. These soils
have a moderate rate of water transmission.
15
Custom Soil Resource Report
Group C. Soils having a slow infiltration rate when thoroughly wet. These consist
chiefly of soils having a layer that impedes the downward movement of water or
soils of moderately fine texture or fine texture. These soils have a slow rate of water
transmission.
Group D. Soils having a very slow infiltration rate (high runoff potential) when
thoroughly wet. These consist chiefly of clays that have a high shrink-swell
potential, soils that have a high water table, soils that have a claypan or clay layer at
or near the surface, and soils that are shallow over nearly impervious material.
These soils have a very slow rate of water transmission.
If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is
for drained areas and the second is for undrained areas. Only the soils that in their
natural condition are in group D are assigned to dual classes.
16
Custom Soil Resource Report
� Map—Hydrologic Soil Group �
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� �
0 100 200 400 E00
Mapprojection:VVebMercator Canermorclinates:WGS84 Edgetics:UTM 7�ne 18N WGS84
17
Custom Soil Resource Report
MAP LEGEND MAP INFORMATION
Area of Interest(AOI) 0 C The soil surveys that comprise your AOI were mapped at
Area of Interest(AOI) 1 24,000.
0 C/D
Soils
Soil Rating Polygons � � Warning:Soil Map may not be valid at this scale.
� A � Not rated or not available
Enlargement of maps beyond the scale of mapping can cause
� �p Water Features misunderstanding of the detail of mapping and accuracy of soil
Streams and Canals line placement.The maps do not show the small areas of
0 B
Transportation contrasting soils that could have been shown at a more detailed
0 B/D scale.
� Rails
Q C
� Interstate Highways
Please rely on the bar scale on each map sheet for map
Q C/D US Routes measurements.
0 � Major Roads
Not rated or not available Source of Map: Natural Resources Conservation Service
0 Local Roads Web Soil Survey URL:
Soil Rating Lines Coordinate System: Web Mercator(EPSG3857)
Background
" � A Aerial Photography
Maps from the Web Soil Survey are based on the Web Mercator
" � �� projection,which preserves direction and shape but distorts
� B distance and area.A projection that preserves area,such as the
Albers equal-area conic projection,should be used if more
r,r B/� accurate calculations of distance or area are required.
N � C
This product is generated from the USDA-NRCS certified data as
� � C/D of the version date(s)listed below.
r � D
Soil Survey Area: Saratoga County, New York
r ,� Not rated or not available Sulvey Area Data: Version 20,Jun 11,2020
Soil Rating Points
0 A Soil map units are labeled(as space allows)for map scales
1:50,000 or larger.
0 A/D
� B Date(s)aerial images were photographed: Oct 7,2013—Nov 9,
2016
� Bi�
The orthophoto or other base map on which the soil lines were
compiled and digitized probably differs from the background
imagery displayed on these maps.As a result,some minor
shifting of map unit boundaries may be evident.
18
Custom Soil Resource Report
Table—Hydrologic Soil Group
Map unit symbol Map unit name Rating Acres in AOI Percent of AOI
WnB Windsor loamy sand,3 A 33.7 100.0°k
to 8 percent slopes
Totals for Area of Interest 33.7 100.0%
Rating Options—Hydrologic Soil Group
Aggregation Method: Dominant Condition
Component Percent Cutoff.�None Specified
Tie-break Rule: Higher
19
References
American Association of State Highway and Transportation Officials (AASHTO).
2004. Standard specifications for transportation materials and methods of sampling
and testing. 24th edition.
American Society for Testing and Materials (ASTM). 2005. Standard classification of
soils for engineering purposes. ASTM Standard D2487-00.
Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of
wetlands and deep-water habitats of the United States. U.S. Fish and Wldlife
Service FWS/OBS-79/31.
Federal Register. July 13, 1994. Changes in hydric soils of the United States.
Federal Register. September 18, 2002. Hydric soils of the United States.
Hurt, G.W., and L.M. Vasilas, editors. Version 6.0, 2006. Field indicators of hydric
soils in the United States.
National Research Council. 1995. Wetlands: Characteristics and boundaries.
Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service.
U.S. Department of Agriculture Handbook 18. http://www.nres.usda.gov/wps/portal/
n res/d eta i I/n ati o n a I/s o i Is/?cid=n res 142 p2_0 54262
Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for
making and interpreting soil surveys. 2nd edition. Natural Resources Conservation
Service, U.S. Department of Agriculture Handbook 436. http://
www.nres.usda.gov/wps/portal/nres/detail/national/soils/?cid=nres142p2_053577
Soil Survey Staff. 2010. Keys to soil taxonomy. 11th edition. U.S. Department of
Agriculture, Natural Resources Conservation Service. http://
www.nres.usda.gov/wps/portal/nres/detail/national/soils/?cid=nres142p2_053580
Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wldlife Service and
Delaware Department of Natural Resources and Environmental Control, Wetlands
Section.
United States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of
Engineers wetlands delineation manual. Waterways Experiment Station Technical
Report Y-87-1.
United States Department of Agriculture, Natural Resources Conservation Service.
National forestry manual. http://www.nres.usda.gov/wps/portal/nres/detail/soils/
home/?cid=nres142p2_053374
United States Department of Agriculture, Natural Resources Conservation Service.
National range and pasture handbook. http://www.nres.usda.gov/wps/portal/nres/
detail/national/landuse/rangepastu re/?cid=stelprdb1043084
20
Custom Soil Resource Report
United States Department of Agriculture, Natural Resources Conservation Service.
National soil survey handbook, title 430-VI. http://www.nres.usda.gov/wps/portal/
n res/d eta i I/so i Is/scie ntists/?cid=n res 142 p2_054242
United States Department of Agriculture, Natural Resources Conservation Service.
2006. Land resource regions and major land resource areas of the United States,
the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook
296. http://www.nres.usda.gov/wps/portal/nres/detail/national/soils/?
cid=n res 142 p2_05 3624
United States Department of Agriculture, Soil Conservation Service. 1961. Land
capability classification. U.S. Department of Agriculture Handbook 210. http://
www.n res.usda.gov/I nternet/FSE_DOCU M ENTS/n res142p2_052290.pdf
21
Appendix G
Drainage Maps
Stormwater Pollution Prevention Plan (SWPPP) G
26 Freedom Way February 2021
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SG2 IB-1 35,064 9,369 44,433 1,270 45,703 4,051
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r� � l \ ., M1` TOta�S 52,512 95,546 16,035 164,393 53,200 247,593 15,365 PROFESSIONAL ENGINEER, TO ALTER THIS DOCUMENT IN ANY WAY. IF ALTERED, THE
ALTERING ENGINEER SHALL AFFIX TO THE DOCUMENT THEIR SEAL, THE NOTATION
' I I � �� "ALTERED BY"FOLLOWED BY THEIR SIGNATURE, THE DATE OF SUCH ALTERATION, AND
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I � 195� "` • I COPYRIGHT�2020 VERITY ENGINEERING D.P.C. ALL RIGHTS RESERVED.
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Appendix H
NYSDEC Green Infrastructure Worksheets
Stormwater Pollution Prevention Plan (SWPPP) H
26 Freedom Way February 2021
Version 1.8 Total Water Quality Volume Calculation
Last Updated: 11/09/2015 WQv(acre-feet)_[(P)(Rv)(A)]/12
Is this project subject to Chapter 10 of the NYS Design Manual(i.e.WQv is equal to post-development 1 year
runoffvolume)?...................................................................................... No
Design Point: SITE
Manually enter P, Total Area and Impervious Cover.
P- 1.15 inch
Breakdown of Subcatchments
Percent
Catchment Total Area Impervious Area WQ�
Impervious Rv 3 Description
Number (Acres) (Acres) oo (ft )
1 3.979 2.911 73% 0.708 11,768 Infiltration Basin
2
3
4
5
6
7 0.384 0.247 64% 0.63 1,007 Drywell
8 0.157 0.046 29% 0.31 205 Dry well
9 1.161 0.570 49% 0.49 2,384 Infiltration Basin
10
Subtotal(1-30) 5.682 3.774 66% 0.65 15,365 Subtotal 1
Total 5.682 3.774 66% 0.65 15,365 Initial WQv 0.353 af
Identify Runoff Reduction Techniques By Area
Tota I
Contributing
Technique Contributing Impervious Area Notes
Area
(Acre) (Acre)
Conservation of Natural Areas 0.000 0.000 minimum 10,000 sf
Riparian Buffers 0.000 0.000 maximum contributing length 75 feet to 150 feet
Filter Strips 0.000 0.000
Tree Planting 0.000 0.000 Up to 100 sf directly connected impervious area
may be subtracted per tree
Total 0.000 0.000
Recalculate WQv after application of Area Reduction Techniques
Total Area Impervious Area Percent Runoff WQ�
Impervious Coefficient 3
(Acres) (Acres) oo (ft )
Rv
"«Initial WQv" 5.682 3.774 66% 0.648 15,365
Subtract Area 0.000 0.000
WQv adjusted after Area Reductions 5.682 3.774 66% 0.648 15,365
Disconnection of Rooftops 0.000
Adjusted WQv after Area Reduction
and Rooftop Disconnect 5.682 3.774 66% 0.648 15,365 0.353 af
WQv reduced by Area Reduction
techniques 0 0.000 af
Version 1.8 Total Water Quality Volume Calculation
Last Updated: 11/09/2015 WQv(acre-feet) _ [(P)(Rv)(A)] /12
Runoff Reduction Volume and Treated volumes
Tota I
Runoff Reduction Techiques/Standard Total Contributing WR� wQv
Contributing Reduced
SMPS Area Impervious (RRv) Treated
Area
(acres) (acres) cf cf
Conservation of Natural Areas RR-1 0.000 0.000
Sheetflow to Riparian Buffers/Filter
� RR-2 0.000 0.000
° Strips
+�
� Tree Planting/Tree Pit RR-3 0.000 0.000
�
� Disconnection of Rooftop Runoff RR-4 0.000
°' Vegetated Swale RR-5 0.000 0.000 0
E
o Rain Garden RR-6 0.000 0.000 0
� Stormwater Planter RR-7 0.000 0.000 0
�
°' Rain Barrel/Cistern RR-8 0.000 0.000 0
Q
Porous Pavement RR-9 0.000 0.000 0
Green Roof(Intensive & Extensive) RR-10 0.000 0.000 0
Infiltration Trench I-1 0.000 0.000 0 0
a � Infiltration Basin I-2 5.141 3.481 14,152 0
U
� Q Dry Well I-3 0.541 0.293 1,114 98
� � Underground Infiltration System I-4
� �
� �
c
N 3 Bioretention & Infiltration Bioretention F-5 0.000 0.000 0 0
Dry swale O-1 0.000 0.000 0 0
Micropool Extended Detention (P-1) P-1
Wet Pond (P-2) P-2
Wet Extended Detention (P-3) P-3
Multiple Pond system (P-4) P-4
�, Pocket Pond (p-5) P-5
� Surface Sand filter (F-1) F-1
� Underground Sand filter (F-2) F-2
L
� Perimeter Sand Filter(F-3) F-3
� Organic Filter (F-4 F-4
`�' Shallow Wetland (W-1) W-1
Extended Detention Wetland (W-2 W-2
Pond/Wetland System (W-3) W-3
Pocket Wetland (W-4) W-4
Wet Swale (O-2) O-2
Totals by Area Reduction � 0.000 0.000 0
Totals by Volume Reduction � 0.000 0.000 0
Totals by Standard SMP w/RRV � 5.682 3.774 15,267 98
Totals by Standard SMP � 0.000 0.000 0
Totals ( Area +Volume + all SMPs) � 5.682 3.774 15,267 98
Impervious Cover� okay
Total Area � okay
Version 1.8 Total Water Quality Volume Calculation
Last Updated: 11/09/2015 WQv(acre-feet) _ [(P)(Rv)(A)] /12
Enter the Soils Data for the site
Soil Group Acres S
A 5.684 55%
B 40%
C 30%
D 20%
Total Area 5.684
Calculate the Minimum RRv
S= 0.55
Impervious = 3.774 acre
Precipitation 1.15 in
Rv 0.95
Minimum RRv 8,232 3
0.189 ac.-ft.
Infiltration Basin Worksheet
Design Point: SITE
Enter Site Data For Drainage Area to be Treated by Practice
Impervious Percent
Catchment Total Area WQ� Precipitation
Area Impervious Rv 3 Description
Number (Acres) (Acres) / (ft ) (in)
Infiltration
1 3.979 2.911 0.73 0.708 11,768 1.15
Basin
Enter Impervious Area Reduced by o «WQv after adjusting for
0.708 11,768
Disconnection of Rooftops 0.000 73 o Disconnected Rooftops
Enter the portion of the WQv that is not reduced for all practices routed 3
to this practice. � ft
Pretreatment Techniques to Prevent Clogging
Infiltration Rate 12.00 in/hour Okay
Pretreatment Sizing 100 / wQ� 25%minimum;
50%i >2 in hr
Pretreatment Required Volume 11,768 ft3
Pretreatment Provided 11,768 ft3
Pretreatment Techniques utilized Plunge Pool
Size An Infiltration Basin
Design Volume 11,768 ft3 WQv
Basal Area 2 942 t2 Infiltration practices shall be designed to exfiltrate the entire
Required ' f WQv through the floor of each practice.
Basal Area g g06 ft2
Provided
Design Depth 4.00 ft
Volume 3 Storage Volume provided in infiltration basin area(not
Provided 35,624 ft including pretreatment.
Determine Runoff Reduction
90%of the storage provided in the basin or WQv whichever
RRv 11,768 ft3 is smaller
Volume Treated 0 ft 3 This is the portion of the WQv that is not reduced/infiltrated
The infiltration basin must provide storage equal to or greater
Sizing� OK
than the WQv of the contributing area.
Dry Well Worksheet
Design Point: SITE
Enter Site Data For Drainage Area to be Treated by Practice
Impervious Percent
Catchment Total Area WQ� Precipitation
Area Impervious Rv 3 Description
Number (Acres) �Acres) / �ft � (in)
7 0.38 0.25 0.64 0.63 1007.21 1.15 Dry Well
Enter Impervious Area Reduced «WQv after adjusting for
64% 0.63 1,007
by Disconnection of Rooftops Disconnected Rooftops
Design Elements
Pretreatment Techniques to Prevent Clogging
Infiltration Rate 12.00 in/hour Okay
Pretreatment Sizing 100% of WQv 25%minimum;50%if>2 in/hr; 100%if
>5in/hour
Required Pretreatment Volume 1,007 ft3
Actual Pretreatment Provided 1007 ft3
Pretreatment can be provided in the form of a
Pretreatment techniques Utilized Grassed Filter Strip sedimentation basin,sump pit, grass channel,
pl unge pool or other measure
Size the Dry Well(s)
Ap=Vw/(ndt)
Design Volume Vw 1,007 ft3
Porosity n 1.0
Design Depth dt 5.0 ft Maximum of 4 feet
Depth to Groundwater 10.0 ft Bottom of Dry Well>3 feet from seasonally
high groundwater
Surface Area Ap 201 ft2
Area per Unit 202 ft2 8 ft diameter prevfabricated Dry Wells
Number of Units Required 1.0
Number of Units Specified 1.0
Volume Provided 1,010 ft3 Storage Volume provided in dry well(not
including pretreatment.
Determine Runoff Reduction
RRv 909 ft3 90%of the storage provided
Volume Treated 98 ft3 This is the portion of the WQv that is not reduced/infiltrated
Dry Well Worksheet
Design Point: SITE
Enter Site Data For Drainage Area to be Treated by Practice
Impervious Percent
Catchment Total Area WQ� Precipitation
Area Impervious Rv 3 Description
Number (Acres) �Acres) / �ft � (in)
8 0.16 0.05 0.29 0.31 205.47 1.15 Dry Well
Enter Impervious Area Reduced «WQv after adjusting for
29%
by Disconnection of Rooftops 0.31 205 Disconnected Rooftops
Design Elements
Pretreatment Techniques to Prevent Clogging
Infiltration Rate 12.00 in/hour Okay
Pretreatment Sizing 100% of WQv 25%minimum;50%if>2 in/hr; 100%if
>5in/hour
Required Pretreatment Volume 205 ft3
Actual Pretreatment Provided 205 ft3
Pretreatment can be provided in the form of a
Pretreatment techniques Utilized Grassed Filter Strip sedimentation basin,sump pit, grass channel,
pl unge pool or other measure
Size the Dry Well(s)
Ap=Vw/(ndt)
Design Volume Vw 205 ft3
Porosity n 1.0
Design Depth dt 5.0 ft Maximum of 4 feet
Depth to Groundwater 10.0 ft Bottom of Dry Well>3 feet from seasonally
high groundwater
Surface Area Ap 41 ft2
Area per Unit 73 ft2 8 ft diameter prevfabricated Dry Wells
Number of Units Required 0.6
Number of Units Specified 1.0
Volume Provided 367 ft3 Storage Volume provided in dry well(not
including pretreatment.
Determine Runoff Reduction
RRv 205 ft3 90%of the storage provided
Volume Treated 0 ft3 This is the portion of the WQv that is not reduced/infiltrated
Infiltration Basin Worksheet
Design Point: SITE
Enter Site Data For Drainage Area to be Treated by Practice
Impervious Percent
Catchment Total Area WQ� Precipitation
Area Impervious Rv 3 Description
Number (Acres) (Acres) / (ft ) (in)
Infiltration
9 1.161 0.570 0.49 0.492 2,384 1.15
Basin
Enter Impervious Area Reduced by o «WQv after adjusting for
0.492 2,384
Disconnection of Rooftops 0.000 49 o Disconnected Rooftops
Enter the portion of the WQv that is not reduced for all practices routed 3
to this practice. � ft
Pretreatment Techniques to Prevent Clogging
Infiltration Rate 12.00 in/hour Okay
Pretreatment Sizing 100 / wQ� 25%minimum;
50%i >2 in hr
Pretreatment Required Volume 2,384 ft3
Pretreatment Provided 2,384 ft3
Pretreatment Techniques utilized Grass Channel
Size An Infiltration Basin
Design Volume 2,384 ft3 WQv
Basal Area 2 384 t2 �nfiltration practices shall be designed to exfiltrate the entire
Required ' f WQv through the floor of each practice.
Basal Area 31ggg ft2
Provided
Design Depth 1.00 ft
Volume 3 ggg t3 Storage Volume provided in infiltration basin area(not
Provided ' f including pretreatment.
Determine Runoff Reduction
90%of the storage provided in the basin or WQv whichever
RRv 2,384 ft3 is smaller
Volume Treated 0 ft 3 This is the portion of the WQv that is not reduced/infiltrated
The infiltration basin must provide storage equal to or greater
Sizing� OK
than the WQv of the contributing area.
Appendix I
Pre-Development Drainage Calculations
Stormwater Pollution Prevention Plan (SWPPP) I
26 Freedom Way February 2021
Appendix J
Post-Development Drainage Calculations
Stormwater Pollution Prevention Plan (SWPPP) J
26 Freedom Way February 2021
7S
8S
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sc-s Y
8P 7P
Drywell#2 Drywell#1
9S 5S � 6P
SC-9 SC-5 Eave Trench 3S
6S
2P �sc-6 4S -� 5P � 4P sc-3
4 - - -
— ' gp Swale
Infiltration Basin#2 SC-4 Eave Trench
Eave Tre ch
ZS
sc-2�
�B
1S 3P
SC-1 � � CB-1
1P
Infiltration Basin#1
SubCat Reach 011 Link Routing Diagram for 20-015 DR-PR
Prepared by Verity Engineering, D.P.C., Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 1-yrRainfa11=2.22"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 2
Time span=0.00-48.00 hrs, dt=0.05 hrs, 961 points
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN
Reach routing by Stor-Ind method - Pond routing by Stor-Ind method
Subcatchment1S:SC-1 Runoff Area=80,629 sf 48.18%Impervious Runoff Depth=0.25"
Tc=6.0 min CN=67 Runoff=0.55 cfs 0.038 af
Subcatchment2S:SC-2 Runoff Area=45,698 sf 75.57%Impervious Runoff Depth=1.69"
Tc=6.0 min CN=95 Runoff=2.88 cfs 0.148 af
Subcatchment3S:SC-3 Runoff Area=10,137 sf 65.76%Impervious Runoff Depth=0.61"
Tc=6.0 min CN=78 Runoff=0.24 cfs 0.012 af
Subcatchment4S:SC-4 Runoff Area=10,170 sf 100.00% Impervious Runoff Depth=1.99"
Tc=6.0 min CN=98 Runoff=0.70 cfs 0.039 af
Subcatchment5S:SC-5 Runoff Area=8,725 sf 100.00%Impervious Runoff Depth=1.99"
Tc=6.0 min CN=98 Runoff=0.60 cfs 0.033 af
Subcatchment6S:SC-6 Runoff Area=17,654 sf 100.00% Impervious Runoff Depth=1.99"
Tc=6.0 min CN=98 Runoff=1.22 cfs 0.067 af
Subcatchment7S:SC-7 Runoff Area=16,719 sf 64.29%Impervious Runoff Depth=0.57"
Tc=6.0 min CN=77 Runoff=0.37 cfs 0.018 af
Subcatchment8S:SC-8 Runoff Area=6,949 sf 28.81%Impervious Runoff Depth=0.05"
Tc=6.0 min CN=56 Runoff=0.00 cfs 0.001 af
Subcatchment9S:SC-9 Runoff Area=50,587 sf 49.08%Impervious Runoff Depth=0.27"
Tc=6.0 min CN=68 Runoff=0.41 cfs 0.026 af
Pond 1 P:Infiltration Basin#1 Peak Elev=322.16' Storage=5,097 cf Inflow=3.37 cfs 0.186 af
Outflow=1.28 cfs 0.192 af
Pond 2P:Infiltration Basin#2 Peak Elev=326.24' Storage=96 cf Inflow=0.41 cfs 0.026 af
Outflow=0.23 cfs 0.026 af
Pond 3P:CB-1 Peak EIev=323.40' Inflow=2.88 cfs 0.148 af
24.0" Round Culvert n=0.012 L=105.0' S=0.0029'/' Outflow=2.88 cfs 0.148 af
Pond 4P:Swale Peak Elev=328.63' Storage=517 cf Inflow=0.24 cfs 0.012 af
Outflow=0.00 cfs 0.000 af
Pond 5P: Eave Trench Peak EIev=330.05' Storage=314 cf Inflow=0.70 cfs 0.039 af
Discarded=0.22 cfs 0.039 af Primary=0.00 cfs 0.000 af Outflow=0.22 cfs 0.039 af
Pond 6P: Eave Trench Peak Elev=329.75' Storage=279 cf Inflow=0.60 cfs 0.033 af
Discarded=0.18 cfs 0.033 af Primary=0.00 cfs 0.000 af Outflow=0.18 cfs 0.033 af
Pond 7P: Drywell#1 Peak Elev=324.22' Storage=186 cf Inflow=0.37 cfs 0.018 af
Outflow=0.08 cfs 0.018 af
Pond 8P: Drywell#2 Peak Elev=322.58' Storage=0 cf Inflow=0.00 cfs 0.001 af
Outflow=0.00 cfs 0.001 af
Pond 9P: Eave Trench Peak Elev=329.58' Storage=526 cf Inflow=1.22 cfs 0.067 af
Discarded=0.40 cfs 0.068 af Primary=0.00 cfs 0.000 af Secondary=0.00 cfs 0.000 af Outflow=0.40 cfs 0.068 af
Total Runoff Area= 5.676 ac Runoff Volume=0.383 af Average Runoff Depth =0.81"
37.65% Pervious=2.137 ac 62.35% Impervious=3.539 ac
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 1-yrRainfa11=2.22"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 3
Summary for Subcatchment 1S: SC-1
Runoff = 0.55 cfs @ 12.01 hrs, Volume= 0.038 af, Depth= 0.25"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 1-yr Rainfall=2.22"
Area(sf) CN Description
41,783 39 >75%Grass cover, Good, HSG A
22,903 98 Paved parking, HSG A
15,943 98 Roofs, HSG A
80,629 67 Weighted Average
41,783 51.82% Pervious Area
38,846 48.18% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 2S: SC-2
Runoff = 2.88 cfs @ 11.96 hrs, Volume= 0.148 af, Depth= 1.69"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 1-yr Rainfall=2.22"
Area(sf) CN Description
9,369 96 Gravel surface, HSG A
34,536 98 Paved parking, HSG A
1,793 39 >75%Grass cover, Good, HSG A
45,698 95 Weighted Average
11,162 24.43% Pervious Area
34,536 75.57% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 3S: SC-3
Runoff = 0.24 cfs @ 11.98 hrs, Volume= 0.012 af, Depth= 0.61"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 1-yr Rainfall=2.22"
Area(sf) CN Description
3,471 39 >75%Grass cover, Good, HSG A
6,666 98 Paved parking, HSG A
10,137 78 Weighted Average
3,471 34.24% Pervious Area
6,666 65.76% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 4S: SC-4
Runoff = 0.70 cfs @ 11.96 hrs, Volume= 0.039 af, Depth= 1.99"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 1-yr Rainfall=2.22"
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 1-yrRainfa11=2.22"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 4
Area(sf) CN Description
10,170 98 Roofs, HSG A
10,170 100.00% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 5S: SC-5
Runoff = 0.60 cfs @ 11.96 hrs, Volume= 0.033 af, Depth= 1.99"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 1-yr Rainfall=2.22"
Area(sf) CN Description
8,725 98 Roofs, HSG A
8,725 100.00% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 6S: SC-6
Runoff = 1.22 cfs @ 11.96 hrs, Volume= 0.067 af, Depth= 1.99"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 1-yr Rainfall=2.22"
Area(sf) CN Description
17,654 98 Roofs, HSG A
17,654 100.00% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 7S: SC-7
Runoff = 0.37 cfs @ 11.98 hrs, Volume= 0.018 af, Depth= 0.57"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 1-yr Rainfall=2.22"
Area(sf) CN Description
10,749 98 Paved parking, HSG A
5,970 39 >75%Grass cover, Good, HSG A
16,719 77 Weighted Average
5,970 35.71% Pervious Area
10,749 64.29% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 8S: SC-8
Runoff = 0.00 cfs @ 13.49 hrs, Volume= 0.001 af, Depth= 0.05"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 1-yr Rainfall=2.22"
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 1-yrRainfa11=2.22"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 5
Area(sf) CN Description
2,002 98 Paved parking, HSG A
4,947 39 >75%Grass cover, Good, HSG A
6,949 56 Weighted Average
4,947 71.19% Pervious Area
2,002 28.81% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 9S: SC-9
Runoff = 0.41 cfs @ 12.00 hrs, Volume= 0.026 af, Depth= 0.27"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 1-yr Rainfall=2.22"
Area(sf) CN Description
25,759 39 >75%Grass cover, Good, HSG A
24,828 98 Paved parking, HSG A
50,587 68 Weighted Average
25,759 50.92% Pervious Area
24,828 49.08% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Pond 1P: Infiltration Basin #1
Inflow Area= 3.972 ac, 67.39% Impervious, Inflow Depth = 0.56" for 1-yr event
Inflow = 3.37 cfs @ 11.98 hrs, Volume= 0.186 af
OutFlow = 1.28 cfs @ 12.10 hrs, Volume= 0.192 af, Atten=62%, Lag=7.3 min
Discarded = 1.28 cfs @ 12.10 hrs, Volume= 0.192 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Starting Elev=322.00' Surf.Area=4,490 sf Storage=4,003 cf
Peak Elev=322.16'@ 12.10 hrs Surf.Area=4,620 sf Storage=5,097 cf (1,093 cf above start)
Flood Elev=325.00' Surf.Area=5,322 sf Storage=30,354 cf (26,351 cf above start)
Plug-Flow detention time=250.3 min calculated for 0.100 af(54%of inflow)
Center-of-Mass det. time=(not calculated: outflow precedes inflow)
Volume Invert Avail.Storage Storage Description
#1 319.00' 6,434 cf Forebay(Irregular)Listed below(Recalc)-Impervious
#2 322.00' 4,900 cf Infiltration (Irregular)Listed below(Recalc)
#3 323.00' 30,725 cf Storage(Irregular)Listed below(Recalc)-Impervious
42,060 cf Total Available Storage
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
319.00 653 133.9 0 0 653
320.00 1,074 151.3 855 855 1,073
321.00 1,561 170.9 1,310 2,165 1,601
322.00 2,131 196.9 1,839 4,003 2,383
323.00 2,744 218.3 2,431 6,434 3,120
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
322.00 4,490 266.6 0 0 4,490
323.00 5,322 286.9 4,900 4,900 5,426
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 1-yrRainfa11=2.22"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 6
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
323.00 8,196 425.3 0 0 8,196
324.00 9,495 445.5 8,838 8,838 9,662
325.00 10,885 466.9 10,182 19,020 11,281
326.00 12,546 590.3 11,706 30,725 21,676
Device Routing Invert Outlet Devices
#1 Discarded 322.00' 12.000 in/hr Exfiltration over Horizontal area
Discarded OutFlow Max=1.28 cfs @ 12.10 hrs HW=322.16' (Free Discharge)
L1=Exfiltration (Exfiltration Controls 1.28 cfs)
Summary for Pond 2P: Infiltration Basin #2
Inflow Area= 1.161 ac, 49.08% Impervious, Inflow Depth = 0.27" for 1-yr event
Inflow = 0.41 cfs @ 12.00 hrs, Volume= 0.026 af
OutFlow = 0.23 cfs @ 12.08 hrs, Volume= 0.026 af, Atten=44%, Lag=4.8 min
Discarded = 0.23 cfs @ 12.08 hrs, Volume= 0.026 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=326.24'@ 12.08 hrs Surf.Area= 832 sf Storage=96 cf
Flood Elev=327.00' Surf.Area= 12,188 sf Storage=3,888 cf
Plug-Flow detention time=2.2 min calculated for 0.026 af(100%of inflow)
Center-of-Mass det. time=2.2 min ( 924.1 -921.9)
Volume Invert Avail.Storage Storage Description
#1 326.00' 3,888 cf Custom Stage Data(Irregular�isted below(Recalc)
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
326.00 100 100.0 0 0 100
326.50 2,507 404.6 518 518 12,332
327.00 12,188 676.5 3,370 3,888 35,725
Device Routing Invert Outlet Devices
#1 Discarded 326.00' 12.000 in/hr Exfiltration over Horizontal area
Discarded OutFlow Max=0.23 cfs @ 12.08 hrs HW=326.23' (Free Discharge)
L1=Exfiltration (Exfiltration Controls 0.23 cfs)
Summary for Pond 3P: CB-1
Inflow Area= 1.716 ac, 80.42% Impervious, Inflow Depth = 1.04" for 1-yr event
Inflow = 2.88 cfs @ 11.96 hrs, Volume= 0.148 af
OutFlow = 2.88 cfs @ 11.96 hrs, Volume= 0.148 af, Atten=0%, Lag= 0.0 min
Primary = 2.88 cfs @ 11.96 hrs, Volume= 0.148 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=323.40'@ 11.96 hrs
Flood Elev=326.50'
Device Routing Invert Outlet Devices
#1 Primary 322.50' 24.0" Round Culvert L= 105.0' CPP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=322.50'/322.20' S=0.0029'/' Cc=0.900
n=0.012 Corrugated PP, smooth interior, FlowArea=3.14 sf
Primary OutFlow Max=2.80 cfs @ 11.96 hrs HW=323.39' (Free Discharge)
L1=Culvert (Barrel Controls 2.80 cfs @ 3.07 fps)
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 1-yrRainfa11=2.22"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 7
Summary for Pond 4P: Swale
Inflow Area= 0.666 ac, 88.04% Impervious, Inflow Depth = 0.21" for 1-yr event
Inflow = 0.24 cfs @ 11.98 hrs, Volume= 0.012 af
OutFlow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Atten= 100%, Lag=0.0 min
Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=328.63'@ 24.40 hrs Surf.Area= 871 sf Storage=517 cf
Flood Elev=329.50' Surf.Area= 1,705 sf Storage= 1,606 cf
Plug-Flow detention time=(not calculated: initial storage exceeds outFlow)
Center-of-Mass det. time=(not calculated: no outflow)
Volume Invert Avail.Storage Storage Description
#1 327.75' 1,606 cf Custom Stage Data(Irregular�isted below(Recalc)
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
327.75 345 236.0 0 0 345
329.00 1,164 300.7 893 893 3,129
329.50 1,705 397.2 713 1,606 8,491
Device Routing Invert Outlet Devices
#1 Primary 324.25' 15.0" Round Culvert L= 166.0' CPP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=324.25'/323.25' S=0.0060'/' Cc=0.900
n=0.012 Corrugated PP, smooth interior, FlowArea= 1.23 sf
#2 Device 1 328.75' 24.0"x 24.0" Horiz. Orifice/Grate C=0.600 Limited to weir flow at low heads
Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=327.75' (Free Discharge)
L1=Culvert (Passes 0.00 cfs of 7.79 cfs potential flow)
L2=0rifice/Grate ( Controls 0.00 cfs)
Summary for Pond 5P: Eave Trench
InflowArea= 0.233 ac,100.00% Impervious, Inflow Depth = 1.99" for 1-yr event
Inflow = 0.70 cfs @ 11.96 hrs, Volume= 0.039 af
OutFlow = 0.22 cfs @ 11.75 hrs, Volume= 0.039 af, Atten=68%, Lag=0.0 min
Discarded = 0.22 cfs @ 11.75 hrs, Volume= 0.039 af
Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=330.05'@ 12.10 hrs Surf.Area= 320 sf Storage=314 cf
Flood Elev=331.60' Surf.Area=320 sf Storage=512 cf
Plug-Flow detention time=(not calculated: outflow precedes inflow)
Center-of-Mass det. time=5.7 min (766.8-761.1 )
Volume Invert Avail.Storage Storage Description
#1 327.60' 512 cf 4.00'W x 80.00'L x 4.00'H Stone
1,280 cf Overall x 40.0%Voids
Device Routing Invert Outlet Devices
#1 Primary 328.60' 8.0" Round Culvert L=28.0' CPP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=328.60'/328.05' S=0.0196'/' Cc=0.900
n=0.012 Corrugated PP, smooth interior, FlowArea=0.35 sf
#2 Device 1 331.10' 24.0" Horiz. Orifice/Grate C=0.600 Limited to weir flow at low heads
#3 Discarded 327.60' 30.000 in/hr Exfiltration over Horizontal area
Discarded OutFlow Max=0.22 cfs @ 11.75 hrs HW=327.65' (Free Discharge)
L3=Exfiltration (Exfiltration Controls 0.22 cfs)
Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=327.60' (Free Discharge)
L1=Culvert ( Controls 0.00 cfs)
L2=0rifice/Grate ( Controls 0.00 cfs)
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 1-yrRainfa11=2.22"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 8
Summary for Pond 6P: Eave Trench
InflowArea= 0.200 ac,100.00% Impervious, Inflow Depth = 1.99" for 1-yr event
Inflow = 0.60 cfs @ 11.96 hrs, Volume= 0.033 af
OutFlow = 0.18 cfs @ 11.75 hrs, Volume= 0.033 af, Atten=70%, Lag=0.0 min
Discarded = 0.18 cfs @ 11.75 hrs, Volume= 0.033 af
Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=329.75'@ 12.11 hrs Surf.Area=264 sf Storage=279 cf
Flood Elev=331.10' Surf.Area=264 sf Storage=422 cf
Plug-Flow detention time=(not calculated: outflow precedes inflow)
Center-of-Mass det. time=6.3 min (767.4-761.1 )
Volume Invert Avail.Storage Storage Description
#1 327.10' 422 cf 4.00'W x 66.00'L x 4.00'H Stone
1,056 cf Overall x 40.0%Voids
Device Routing Invert Outlet Devices
#1 Primary 328.08' 8.0" Round Culvert L= 13.0' CPP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=328.08'/327.85' S=0.0177'/' Cc=0.900
n=0.012 Corrugated PP, smooth interior, FlowArea=0.35 sf
#2 Device 1 330.60' 24.0" Horiz. Orifice/Grate C=0.600 Limited to weir flow at low heads
#3 Discarded 327.10' 30.000 in/hr Exfiltration over Horizontal area
Discarded OutFlow Max=0.18 cfs @ 11.75 hrs HW=327.16' (Free Discharge)
L3=Exfiltration (Exfiltration Controls 0.18 cfs)
Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=327.10' (Free Discharge)
L1=Culvert ( Controls 0.00 cfs)
L2=0rifice/Grate ( Controls 0.00 cfs)
Summary for Pond 7P: Drywell #1
Inflow Area= 0.384 ac, 64.29% Impervious, Inflow Depth = 0.57" for 1-yr event
Inflow = 0.37 cfs @ 11.98 hrs, Volume= 0.018 af
OutFlow = 0.08 cfs @ 12.17 hrs, Volume= 0.018 af, Atten=78%, Lag= 11.0 min
Discarded = 0.08 cfs @ 12.17 hrs, Volume= 0.018 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=324.22'@ 12.17 hrs Surf.Area=290 sf Storage= 186 cf
Plug-Flow detention time=14.3 min calculated for 0.018 af(100%of inflow)
Center-of-Mass det. time= 14.3 min ( 887.2-873.0)
Volume Invert Avail.Storage Storage Description
#1 322.58' 673 cf Stone(Irregular)Listed below(Recalc)
2,153 cf Overall-469 cf Embedded= 1,683 cf x 40.0%Voids
#2 323.58' 394 cf 7.33'D x 4.67'H Drywell x 2 Inside#1
469 cf Overall-4.0"Wall Thickness= 394 cf
#3 329.75' 683 cf Ponding (Irregular)Listed below(Recalc)
1,751 cf Total Available Storage
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
322.58 196 53.5 0 0 196
328.25 600 89.1 2,153 2,153 768
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
329.75 6 10.0 0 0 6
330.00 235 57.5 23 23 261
330.50 2,899 273.8 660 683 5,964
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 1-yrRainfa11=2.22"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 9
Device Routing Invert Outlet Devices
#1 Discarded 322.58' 12.000 in/hr Exfiltration over Horizontal area
Discarded OutFlow Max=0.08 cfs @ 12.17 hrs HW=324.21' (Free Discharge)
L1=Exfiltration (Exfiltration Controls 0.08 cfs)
Summary for Pond 8P: Drywell #2
InflowArea= 0.160 ac, 28.81% Impervious, Inflow Depth = 0.05" for 1-yr event
Inflow = 0.00 cfs @ 13.49 hrs, Volume= 0.001 af
OutFlow = 0.00 cfs @ 13.52 hrs, Volume= 0.001 af, Atten=0%, Lag=2.0 min
Discarded = 0.00 cfs @ 13.52 hrs, Volume= 0.001 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=322.58'@ 13.52 hrs Surf.Area= 90 sf Storage=0 cf
Plug-Flow detention time=1.9 min calculated for 0.001 af(100%of inflow)
Center-of-Mass det. time= 1.9 min ( 1,074.9- 1,073.1 )
Volume Invert Avail.Storage Storage Description
#1 322.58' 401 cf 10.67'D x 5.67'H Stone Z=1.0
1,237 cf Overall-235 cf Embedded= 1,002 cf x 40.0%Voids
#2 323.58' 197 cf 7.33'D x 4.67'H Drywell Inside#1
235 cf Overall-4.0"Wall Thickness= 197 cf
#3 329.75' 245 cf Ponding (Irregular)Listed below(Recalc)-Impervious
843 cf Total Available Storage
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
329.75 6 10.0 0 0 6
330.00 116 38.7 12 12 117
330.50 949 116.0 233 245 1,070
Device Routing Invert Outlet Devices
#1 Discarded 322.58' 12.000 in/hr Exfiltration over Horizontal area
Discarded OutFlow Max=0.02 cfs @ 13.52 hrs HW=322.58' (Free Discharge)
L1=Exfiltration (Exfiltration Controls 0.02 cfs)
Summary for Pond 9P: Eave Trench
InflowArea= 0.405 ac,100.00% Impervious, Inflow Depth = 1.99" for 1-yr event
Inflow = 1.22 cfs @ 11.96 hrs, Volume= 0.067 af
OutFlow = 0.40 cfs @ 11.75 hrs, Volume= 0.068 af, Atten=67%, Lag=0.0 min
Discarded = 0.40 cfs @ 11.75 hrs, Volume= 0.068 af
Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Secondary= 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=329.58'@ 12.10 hrs Surf.Area= 576 sf Storage=526 cf
Flood Elev=331.30' Surf.Area=576 sf Storage=922 cf
Plug-Flow detention time=(not calculated: outflow precedes inflow)
Center-of-Mass det. time=5.2 min (766.3-761.1 )
Volume Invert Avail.Storage Storage Description
#1 327.30' 922 cf 4.00'W x 144.00'L x 4.00'H Stone
2,304 cf Overall x 40.0%Voids
Device Routing Invert Outlet Devices
#1 Primary 328.30' 8.0" Round Culvert L= 184.0' CPP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=328.30'/326.46' S=0.0100'/' Cc=0.900
n=0.012 Corrugated PP, smooth interior, FlowArea=0.35 sf
#2 Device 1 330.80' 24.0" Horiz. Orifice/Grate C=0.600 Limited to weir flow at low heads
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 1-yrRainfa11=2.22"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 10
#3 Discarded 327.30' 30.000 in/hr Exfiltration over Horizontal area
#4 Secondary 331.25' 5.0' long x 144.0' breadth Broad-Crested Rectangular Weir
Head(feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63
Discarded OutFlow Max=0.40 cfs @ 11.75 hrs HW=327.35' (Free Discharge)
L3=Exfiltration (Exfiltration Controls 0.40 cfs)
Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=327.30' (Free Discharge)
L1=Culvert ( Controls 0.00 cfs)
L2=0rifice/Grate ( Controls 0.00 cfs)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=327.30' (Free Discharge)
L4=Broad-Crested Rectangular Weir(Controls 0.00 cfs)
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 10-yr Rainfa11=3.69"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 11
Time span=0.00-48.00 hrs, dt=0.05 hrs, 961 points
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN
Reach routing by Stor-Ind method - Pond routing by Stor-Ind method
Subcatchment1S:SC-1 Runoff Area=80,629 sf 48.18%Impervious Runoff Depth=0.96"
Tc=6.0 min CN=67 Runoff=2.98 cfs 0.148 af
Subcatchment2S:SC-2 Runoff Area=45,698 sf 75.57%Impervious Runoff Depth=3.13"
Tc=6.0 min CN=95 Runoff=5.12 cfs 0.273 af
Subcatchment3S:SC-3 Runoff Area=10,137 sf 65.76%Impervious Runoff Depth=1.64"
Tc=6.0 min CN=78 Runoff=0.66 cfs 0.032 af
Subcatchment4S:SC-4 Runoff Area=10,170 sf 100.00% Impervious Runoff Depth=3.46"
Tc=6.0 min CN=98 Runoff=1.19 cfs 0.067 af
Subcatchment5S:SC-5 Runoff Area=8,725 sf 100.00%Impervious Runoff Depth=3.46"
Tc=6.0 min CN=98 Runoff=1.02 cfs 0.058 af
Subcatchment6S:SC-6 Runoff Area=17,654 sf 100.00% Impervious Runoff Depth=3.46"
Tc=6.0 min CN=98 Runoff=2.06 cfs 0.117 af
Subcatchment7S:SC-7 Runoff Area=16,719 sf 64.29%Impervious Runoff Depth=1.57"
Tc=6.0 min CN=77 Runoff=1.05 cfs 0.050 af
Subcatchment8S:SC-8 Runoff Area=6,949 sf 28.81%Impervious Runoff Depth=0.45"
Tc=6.0 min CN=56 Runoff=0.09 cfs 0.006 af
Subcatchment9S:SC-9 Runoff Area=50,587 sf 49.08%Impervious Runoff Depth=1.01"
Tc=6.0 min CN=68 Runoff=1.99 cfs 0.098 af
Pond 1 P:Infiltration Basin#1 Peak Elev=322.84' Storage=10,044 cf Inflow=9.59 cfs 0.465 af
Outflow=1.44 cfs 0.470 af
Pond 2P:Infiltration Basin#2 Peak Elev=326.58' Storage=766 cf Inflow=1.99 cfs 0.098 af
Outflow=1.00 cfs 0.098 af
Pond 3P:CB-1 Peak Elev=323.74' Inflow=5.07 cfs 0.306 af
24.0" Round Culvert n=0.012 L=105.0' S=0.0029'/' Outflow=5.07 cfs 0.306 af
Pond 4P:Swale Peak Elev=328.93' Storage=817 cf Inflow=3.26 cfs 0.047 af
Outflow=2.05 cfs 0.032 af
Pond 5P: Eave Trench Peak Elev=331.28' Storage=470 cf Inflow=1.19 cfs 0.067 af
Discarded=0.22 cfs 0.060 af Primary=1.28 cfs 0.008 af Outflow=1.50 cfs 0.067 af
Pond 6P: Eave Trench Peak EIev=330.76' Storage=387 cf Inflow=1.02 cfs 0.058 af
Discarded=0.18 cfs 0.050 af Primary=1.35 cfs 0.007 af Outflow=1.53 cfs 0.058 af
Pond 7P: Drywell#1 Peak Elev=327.13' Storage=771 cf Inflow=1.05 cfs 0.050 af
Outflow=0.14 cfs 0.050 af
Pond 8P: Drywell#2 Peak Elev=323.28' Storage=29 cf Inflow=0.09 cfs 0.006 af
Outflow=0.03 cfs 0.006 af
Pond 9P: Eave Trench Peak EIev=331.04' Storage=862 cf Inflow=2.06 cfs 0.117 af
Discarded=0.40 cfs 0.105 af Primary=1.64 cfs 0.011 af Secondary=0.00 cfs 0.000 af Outflow=2.04 cfs 0.117 af
Total Runoff Area= 5.676 ac Runoff Volume=0.849 af Average Runoff Depth = 1.79"
37.65% Pervious=2.137 ac 62.35% Impervious=3.539 ac
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 10-yr Rainfa11=3.69"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 12
Summary for Subcatchment 1S: SC-1
Runoff = 2.98 cfs @ 11.98 hrs, Volume= 0.148 af, Depth= 0.96"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 10-yr Rainfall=3.69"
Area(sf) CN Description
41,783 39 >75%Grass cover, Good, HSG A
22,903 98 Paved parking, HSG A
15,943 98 Roofs, HSG A
80,629 67 Weighted Average
41,783 51.82% Pervious Area
38,846 48.18% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 2S: SC-2
Runoff = 5.12 cfs @ 11.96 hrs, Volume= 0.273 af, Depth= 3.13"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 10-yr Rainfall=3.69"
Area(sf) CN Description
9,369 96 Gravel surface, HSG A
34,536 98 Paved parking, HSG A
1,793 39 >75%Grass cover, Good, HSG A
45,698 95 Weighted Average
11,162 24.43% Pervious Area
34,536 75.57% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 3S: SC-3
Runoff = 0.66 cfs @ 11.97 hrs, Volume= 0.032 af, Depth= 1.64"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 10-yr Rainfall=3.69"
Area(sf) CN Description
3,471 39 >75%Grass cover, Good, HSG A
6,666 98 Paved parking, HSG A
10,137 78 Weighted Average
3,471 34.24% Pervious Area
6,666 65.76% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 4S: SC-4
Runoff = 1.19 cfs @ 11.96 hrs, Volume= 0.067 af, Depth= 3.46"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 10-yr Rainfall=3.69"
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 10-yr Rainfa11=3.69"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 13
Area(sf) CN Description
10,170 98 Roofs, HSG A
10,170 100.00% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 5S: SC-5
Runoff = 1.02 cfs @ 11.96 hrs, Volume= 0.058 af, Depth= 3.46"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 10-yr Rainfall=3.69"
Area(sf) CN Description
8,725 98 Roofs, HSG A
8,725 100.00% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 6S: SC-6
Runoff = 2.06 cfs @ 11.96 hrs, Volume= 0.117 af, Depth= 3.46"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 10-yr Rainfall=3.69"
Area(sf) CN Description
17,654 98 Roofs, HSG A
17,654 100.00% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 7S: SC-7
Runoff = 1.05 cfs @ 11.98 hrs, Volume= 0.050 af, Depth= 1.57"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 10-yr Rainfall=3.69"
Area(sf) CN Description
10,749 98 Paved parking, HSG A
5,970 39 >75%Grass cover, Good, HSG A
16,719 77 Weighted Average
5,970 35.71% Pervious Area
10,749 64.29% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 8S: SC-8
Runoff = 0.09 cfs @ 12.00 hrs, Volume= 0.006 af, Depth= 0.45"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 10-yr Rainfall=3.69"
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 10-yr Rainfa11=3.69"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 14
Area(sf) CN Description
2,002 98 Paved parking, HSG A
4,947 39 >75%Grass cover, Good, HSG A
6,949 56 Weighted Average
4,947 71.19% Pervious Area
2,002 28.81% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 9S: SC-9
Runoff = 1.99 cfs @ 11.98 hrs, Volume= 0.098 af, Depth= 1.01"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 10-yr Rainfall=3.69"
Area(sf) CN Description
25,759 39 >75%Grass cover, Good, HSG A
24,828 98 Paved parking, HSG A
50,587 68 Weighted Average
25,759 50.92% Pervious Area
24,828 49.08% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Pond 1P: Infiltration Basin #1
Inflow Area= 3.972 ac, 67.39% Impervious, Inflow Depth = 1.40" for 10-yr event
Inflow = 9.59 cfs @ 12.00 hrs, Volume= 0.465 af
OutFlow = 1.44 cfs @ 12.21 hrs, Volume= 0.470 af, Atten=85%, Lag= 12.9 min
Discarded = 1.44 cfs @ 12.21 hrs, Volume= 0.470 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Starting Elev=322.00' Surf.Area=4,490 sf Storage=4,003 cf
Peak Elev=322.84'@ 12.21 hrs Surf.Area= 5,182 sf Storage= 10,044 cf (6,041 cf above start)
Flood Elev=325.00' Surf.Area=5,322 sf Storage=30,354 cf (26,351 cf above start)
Plug-Flow detention time=156.0 min calculated for 0.378 af(81%of inflow)
Center-of-Mass det. time= 16.5 min ( 825.0-808.5)
Volume Invert Avail.Storage Storage Description
#1 319.00' 6,434 cf Forebay(Irregular)Listed below(Recalc)-Impervious
#2 322.00' 4,900 cf Infiltration (Irregular)Listed below(Recalc)
#3 323.00' 30,725 cf Storage(Irregular)Listed below(Recalc)-Impervious
42,060 cf Total Available Storage
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
319.00 653 133.9 0 0 653
320.00 1,074 151.3 855 855 1,073
321.00 1,561 170.9 1,310 2,165 1,601
322.00 2,131 196.9 1,839 4,003 2,383
323.00 2,744 218.3 2,431 6,434 3,120
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
322.00 4,490 266.6 0 0 4,490
323.00 5,322 286.9 4,900 4,900 5,426
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 10-yr Rainfa11=3.69"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 15
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
323.00 8,196 425.3 0 0 8,196
324.00 9,495 445.5 8,838 8,838 9,662
325.00 10,885 466.9 10,182 19,020 11,281
326.00 12,546 590.3 11,706 30,725 21,676
Device Routing Invert Outlet Devices
#1 Discarded 322.00' 12.000 in/hr Exfiltration over Horizontal area
Discarded OutFlow Max=1.44 cfs @ 12.21 hrs HW=322.84' (Free Discharge)
L1=Exfiltration (Exfiltration Controls 1.44 cfs)
Summary for Pond 2P: Infiltration Basin #2
Inflow Area= 1.161 ac, 49.08% Impervious, Inflow Depth = 1.01" for 10-yr event
Inflow = 1.99 cfs @ 11.98 hrs, Volume= 0.098 af
OutFlow = 1.00 cfs @ 12.08 hrs, Volume= 0.098 af, Atten=50%, Lag=5.6 min
Discarded = 1.00 cfs @ 12.08 hrs, Volume= 0.098 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=326.58'@ 12.08 hrs Surf.Area= 3,591 sf Storage=766 cf
Flood Elev=327.00' Surf.Area= 12,188 sf Storage=3,888 cf
Plug-Flow detention time=6.7 min calculated for 0.098 af(100%of inflow)
Center-of-Mass det. time=6.7 min ( 875.6-868.9)
Volume Invert Avail.Storage Storage Description
#1 326.00' 3,888 cf Custom Stage Data(Irregular�isted below(Recalc)
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
326.00 100 100.0 0 0 100
326.50 2,507 404.6 518 518 12,332
327.00 12,188 676.5 3,370 3,888 35,725
Device Routing Invert Outlet Devices
#1 Discarded 326.00' 12.000 in/hr Exfiltration over Horizontal area
Discarded OutFlow Max=0.99 cfs @ 12.08 hrs HW=326.58' (Free Discharge)
L1=Exfiltration (Exfiltration Controls 0.99 cfs)
Summary for Pond 3P: CB-1
Inflow Area= 1.716 ac, 80.42% Impervious, Inflow Depth = 2.14" for 10-yr event
Inflow = 5.07 cfs @ 11.95 hrs, Volume= 0.306 af
OutFlow = 5.07 cfs @ 11.95 hrs, Volume= 0.306 af, Atten=0%, Lag= 0.0 min
Primary = 5.07 cfs @ 11.95 hrs, Volume= 0.306 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=323.74'@ 11.95 hrs
Flood Elev=326.50'
Device Routing Invert Outlet Devices
#1 Primary 322.50' 24.0" Round Culvert L= 105.0' CPP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=322.50'/322.20' S=0.0029'/' Cc=0.900
n=0.012 Corrugated PP, smooth interior, FlowArea=3.14 sf
Primary OutFlow Max=5.07 cfs @ 11.95 hrs HW=323.74' (Free Discharge)
L1=Culvert (Barrel Controls 5.07 cfs @ 3.56 fps)
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 10-yr Rainfa11=3.69"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 16
Summary for Pond 4P: Swale
Inflow Area= 0.666 ac, 88.04% Impervious, Inflow Depth = 0.84" for 10-yr event
Inflow = 3.26 cfs @ 12.00 hrs, Volume= 0.047 af
OutFlow = 2.05 cfs @ 12.05 hrs, Volume= 0.032 af, Atten=37%, Lag=3.2 min
Primary = 2.05 cfs @ 12.05 hrs, Volume= 0.032 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=328.93'@ 12.05 hrs Surf.Area= 1,108 sf Storage=817 cf
Flood Elev=329.50' Surf.Area= 1,705 sf Storage= 1,606 cf
Plug-Flow detention time=127.0 min calculated for 0.032 af(69%of inflow)
Center-of-Mass det. time=44.4 min ( 845.6-801.2)
Volume Invert Avail.Storage Storage Description
#1 327.75' 1,606 cf Custom Stage Data(Irregular�isted below(Recalc)
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
327.75 345 236.0 0 0 345
329.00 1,164 300.7 893 893 3,129
329.50 1,705 397.2 713 1,606 8,491
Device Routing Invert Outlet Devices
#1 Primary 324.25' 15.0" Round Culvert L= 166.0' CPP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=324.25'/323.25' S=0.0060'/' Cc=0.900
n=0.012 Corrugated PP, smooth interior, FlowArea= 1.23 sf
#2 Device 1 328.75' 24.0"x 24.0" Horiz. Orifice/Grate C=0.600 Limited to weir flow at low heads
Primary OutFlow Max=1.95 cfs @ 12.05 hrs HW=328.93' (Free Discharge)
L1=Culvert (Passes 1.95 cfs of 9.09 cfs potential flow)
L2=0rifice/Grate (Weir Controls 1.95 cfs @ 1.38 fps)
Summary for Pond 5P: Eave Trench
InflowArea= 0.233 ac,100.00% Impervious, Inflow Depth = 3.46" for 10-yr event
Inflow = 1.19 cfs @ 11.96 hrs, Volume= 0.067 af
OutFlow = 1.50 cfs @ 12.00 hrs, Volume= 0.067 af, Atten=0%, Lag=2.4 min
Discarded = 0.22 cfs @ 11.70 hrs, Volume= 0.060 af
Primary = 1.28 cfs @ 12.00 hrs, Volume= 0.008 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=331.28'@ 12.01 hrs Surf.Area= 320 sf Storage=470 cf
Flood Elev=331.60' Surf.Area=320 sf Storage=512 cf
Plug-Flow detention time=(not calculated: outflow precedes inflow)
Center-of-Mass det. time=7.6 min (757.2-749.5)
Volume Invert Avail.Storage Storage Description
#1 327.60' 512 cf 4.00'W x 80.00'L x 4.00'H Stone
1,280 cf Overall x 40.0%Voids
Device Routing Invert Outlet Devices
#1 Primary 328.60' 8.0" Round Culvert L=28.0' CPP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=328.60'/328.05' S=0.0196'/' Cc=0.900
n=0.012 Corrugated PP, smooth interior, FlowArea=0.35 sf
#2 Device 1 331.10' 24.0" Horiz. Orifice/Grate C=0.600 Limited to weir flow at low heads
#3 Discarded 327.60' 30.000 in/hr Exfiltration over Horizontal area
Discarded OutFlow Max=0.22 cfs @ 11.70 hrs HW=327.71' (Free Discharge)
L3=Exfiltration (Exfiltration Controls 0.22 cfs)
Primary OutFlow Max=1.20 cfs @ 12.00 hrs HW=331.25' (Free Discharge)
L1=Culvert (Passes 1.20 cfs of 2.02 cfs potential flow)
L2=0rifice/Grate (Weir Controls 1.20 cfs @ 1.27 fps)
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 10-yr Rainfa11=3.69"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 17
Summary for Pond 6P: Eave Trench
InflowArea= 0.200 ac,100.00% Impervious, Inflow Depth = 3.46" for 10-yr event
Inflow = 1.02 cfs @ 11.96 hrs, Volume= 0.058 af
OutFlow = 1.53 cfs @ 12.00 hrs, Volume= 0.058 af, Atten=0%, Lag=2.3 min
Discarded = 0.18 cfs @ 11.70 hrs, Volume= 0.050 af
Primary = 1.35 cfs @ 12.00 hrs, Volume= 0.007 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=330.76'@ 12.00 hrs Surf.Area=264 sf Storage=387 cf
Flood Elev=331.10' Surf.Area=264 sf Storage=422 cf
Plug-Flow detention time=(not calculated: outflow precedes inflow)
Center-of-Mass det. time=7.3 min (756.9-749.5)
Volume Invert Avail.Storage Storage Description
#1 327.10' 422 cf 4.00'W x 66.00'L x 4.00'H Stone
1,056 cf Overall x 40.0%Voids
Device Routing Invert Outlet Devices
#1 Primary 328.08' 8.0" Round Culvert L= 13.0' CPP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=328.08'/327.85' S=0.0177'/' Cc=0.900
n=0.012 Corrugated PP, smooth interior, FlowArea=0.35 sf
#2 Device 1 330.60' 24.0" Horiz. Orifice/Grate C=0.600 Limited to weir flow at low heads
#3 Discarded 327.10' 30.000 in/hr Exfiltration over Horizontal area
Discarded OutFlow Max=0.18 cfs @ 11.70 hrs HW=327.23' (Free Discharge)
L3=Exfiltration (Exfiltration Controls 0.18 cfs)
Primary OutFlow Max=1.34 cfs @ 12.00 hrs HW=330.76' (Free Discharge)
L1=Culvert (Passes 1.34 cfs of 2.03 cfs potential flow)
L2=0rifice/Grate (Weir Controls 1.34 cfs @ 1.32 fps)
Summary for Pond 7P: Drywell #1
Inflow Area= 0.384 ac, 64.29% Impervious, Inflow Depth = 1.57" for 10-yr event
Inflow = 1.05 cfs @ 11.98 hrs, Volume= 0.050 af
OutFlow = 0.14 cfs @ 12.31 hrs, Volume= 0.050 af, Atten=87%, Lag= 19.9 min
Discarded = 0.14 cfs @ 12.31 hrs, Volume= 0.050 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=327.13'@ 12.31 hrs Surf.Area= 503 sf Storage=771 cf
Plug-Flow detention time=48.2 min calculated for 0.050 af(100%of inflow)
Center-of-Mass det. time=48.2 min ( 889.5-841.3)
Volume Invert Avail.Storage Storage Description
#1 322.58' 673 cf Stone(Irregular)Listed below(Recalc)
2,153 cf Overall-469 cf Embedded= 1,683 cf x 40.0%Voids
#2 323.58' 394 cf 7.33'D x 4.67'H Drywell x 2 Inside#1
469 cf Overall-4.0"Wall Thickness= 394 cf
#3 329.75' 683 cf Ponding (Irregular)Listed below(Recalc)
1,751 cf Total Available Storage
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
322.58 196 53.5 0 0 196
328.25 600 89.1 2,153 2,153 768
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
329.75 6 10.0 0 0 6
330.00 235 57.5 23 23 261
330.50 2,899 273.8 660 683 5,964
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 10-yr Rainfa11=3.69"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 18
Device Routing Invert Outlet Devices
#1 Discarded 322.58' 12.000 in/hr Exfiltration over Horizontal area
Discarded OutFlow Max=0.14 cfs @ 12.31 hrs HW=327.13' (Free Discharge)
L1=Exfiltration (Exfiltration Controls 0.14 cfs)
Summary for Pond 8P: Drywell #2
InflowArea= 0.160 ac, 28.81% Impervious, Inflow Depth = 0.45" for 10-yr event
Inflow = 0.09 cfs @ 12.00 hrs, Volume= 0.006 af
OutFlow = 0.03 cfs @ 12.13 hrs, Volume= 0.006 af, Atten=65%, Lag=7.8 min
Discarded = 0.03 cfs @ 12.13 hrs, Volume= 0.006 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=323.28'@ 12.13 hrs Surf.Area= 114 sf Storage=29 cf
Plug-Flow detention time=4.5 min calculated for 0.006 af(100%of inflow)
Center-of-Mass det. time=4.5 min ( 927.1 -922.5)
Volume Invert Avail.Storage Storage Description
#1 322.58' 401 cf 10.67'D x 5.67'H Stone Z=1.0
1,237 cf Overall-235 cf Embedded= 1,002 cf x 40.0%Voids
#2 323.58' 197 cf 7.33'D x 4.67'H Drywell Inside#1
235 cf Overall-4.0"Wall Thickness= 197 cf
#3 329.75' 245 cf Ponding (Irregular)Listed below(Recalc)-Impervious
843 cf Total Available Storage
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
329.75 6 10.0 0 0 6
330.00 116 38.7 12 12 117
330.50 949 116.0 233 245 1,070
Device Routing Invert Outlet Devices
#1 Discarded 322.58' 12.000 in/hr Exfiltration over Horizontal area
Discarded OutFlow Max=0.03 cfs @ 12.13 hrs HW=323.28' (Free Discharge)
L1=Exfiltration (Exfiltration Controls 0.03 cfs)
Summary for Pond 9P: Eave Trench
InflowArea= 0.405 ac,100.00% Impervious, Inflow Depth = 3.46" for 10-yr event
Inflow = 2.06 cfs @ 11.96 hrs, Volume= 0.117 af
OutFlow = 2.04 cfs @ 12.01 hrs, Volume= 0.117 af, Atten= 1%, Lag=2.8 min
Discarded = 0.40 cfs @ 11.70 hrs, Volume= 0.105 af
Primary = 1.64 cfs @ 12.01 hrs, Volume= 0.011 af
Secondary= 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=331.04'@ 12.02 hrs Surf.Area= 576 sf Storage=862 cf
Flood Elev=331.30' Surf.Area=576 sf Storage=922 cf
Plug-Flow detention time=(not calculated: outflow precedes inflow)
Center-of-Mass det. time=8.0 min (757.5-749.5)
Volume Invert Avail.Storage Storage Description
#1 327.30' 922 cf 4.00'W x 144.00'L x 4.00'H Stone
2,304 cf Overall x 40.0%Voids
Device Routing Invert Outlet Devices
#1 Primary 328.30' 8.0" Round Culvert L= 184.0' CPP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=328.30'/326.46' S=0.0100'/' Cc=0.900
n=0.012 Corrugated PP, smooth interior, FlowArea=0.35 sf
#2 Device 1 330.80' 24.0" Horiz. Orifice/Grate C=0.600 Limited to weir flow at low heads
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 10-yr Rainfa11=3.69"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 19
#3 Discarded 327.30' 30.000 in/hr Exfiltration over Horizontal area
#4 Secondary 331.25' 5.0' long x 144.0' breadth Broad-Crested Rectangular Weir
Head(feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63
Discarded OutFlow Max=0.40 cfs @ 11.70 hrs HW=327.41' (Free Discharge)
L3=Exfiltration (Exfiltration Controls 0.40 cfs)
Primary OutFlow Max=1.53 cfs @ 12.01 hrs HW=330.98' (Free Discharge)
L1=Culvert (Passes 1.53 cfs of 1.71 cfs potential flow)
L2=0rifice/Grate (Weir Controls 1.53 cfs @ 1.38 fps)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=327.30' (Free Discharge)
L4=Broad-Crested Rectangular Weir(Controls 0.00 cfs)
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 25-yr Rainfa11=4.51"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 20
Time span=0.00-48.00 hrs, dt=0.05 hrs, 961 points
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN
Reach routing by Stor-Ind method - Pond routing by Stor-Ind method
Subcatchment1S:SC-1 Runoff Area=80,629 sf 48.18%Impervious Runoff Depth=1.47"
Tc=6.0 min CN=67 Runoff=4.69 cfs 0.227 af
Subcatchment2S:SC-2 Runoff Area=45,698 sf 75.57%Impervious Runoff Depth=3.93"
Tc=6.0 min CN=95 Runoff=6.35 cfs 0.344 af
Subcatchment3S:SC-3 Runoff Area=10,137 sf 65.76%Impervious Runoff Depth=2.30"
Tc=6.0 min CN=78 Runoff=0.92 cfs 0.045 af
Subcatchment4S:SC-4 Runoff Area=10,170 sf 100.00% Impervious Runoff Depth=4.27"
Tc=6.0 min CN=98 Runoff=1.46 cfs 0.083 af
Subcatchment5S:SC-5 Runoff Area=8,725 sf 100.00%Impervious Runoff Depth=4.27"
Tc=6.0 min CN=98 Runoff=1.25 cfs 0.071 af
Subcatchment6S:SC-6 Runoff Area=17,654 sf 100.00% Impervious Runoff Depth=4.27"
Tc=6.0 min CN=98 Runoff=2.53 cfs 0.144 af
Subcatchment7S:SC-7 Runoff Area=16,719 sf 64.29%Impervious Runoff Depth=2.22"
Tc=6.0 min CN=77 Runoff=1.47 cfs 0.071 af
Subcatchment8S:SC-8 Runoff Area=6,949 sf 28.81%Impervious Runoff Depth=0.80"
Tc=6.0 min CN=56 Runoff=0.20 cfs 0.011 af
Subcatchment9S:SC-9 Runoff Area=50,587 sf 49.08%Impervious Runoff Depth=1.54"
Tc=6.0 min CN=68 Runoff=3.09 cfs 0.149 af
Pond 1 P:Infiltration Basin#1 Peak Elev=323.33' Storage=14,145 cf Inflow=15.71 cfs 0.649 af
Outflow=1.48 cfs 0.654 af
Pond 2P:Infiltration Basin#2 Peak EIev=326.70' Storage=1,314 cf Inflow=3.14 cfs 0.149 af
Outflow=1.54 cfs 0.149 af
Pond 3P:CB-1 Peak EIev=324.30' Inflow=9.33 cfs 0.400 af
24.0" Round Culvert n=0.012 L=105.0' S=0.0029'/' Outflow=9.33 cfs 0.400 af
Pond 4P:Swale Peak EIev=329.01' Storage=909 cf Inflow=3.50 cfs 0.070 af
Outflow=3.50 cfs 0.056 af
Pond 5P: Eave Trench Peak Elev=331.25' Storage=468 cf Inflow=1.46 cfs 0.083 af
Discarded=0.22 cfs 0.070 af Primary=1.25 cfs 0.013 af Outflow=1.47 cfs 0.083 af
Pond 6P: Eave Trench Peak EIev=330.75' Storage=386 cf Inflow=1.25 cfs 0.071 af
Discarded=0.18 cfs 0.059 af Primary=1.30 cfs 0.012 af Outflow=1.48 cfs 0.071 af
Pond 7P: Drywell#1 Peak EIev=330.07' Storage=1,114 cf Inflow=1.47 cfs 0.071 af
Outflow=0.29 cfs 0.071 af
Pond 8P: Drywell#2 Peak Elev=324.21' Storage=92 cf Inflow=0.20 cfs 0.011 af
Outflow=0.04 cfs 0.011 af
Pond 9P: Eave Trench Peak Elev=331.28' Storage=916 cf Inflow=2.53 cfs 0.144 af
Discarded=0.40 cfs 0.122 af Primary=1.80 cfs 0.022 af Secondary=0.06 cfs 0.000 af Outflow=2.25 cfs 0.144 af
Total Runoff Area= 5.676 ac Runoff Volume= 1.145 af Average Runoff Depth =2.42"
37.65% Pervious=2.137 ac 62.35% Impervious=3.539 ac
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 25-yr Rainfa11=4.51"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 21
Summary for Subcatchment 1S: SC-1
Runoff = 4.69 cfs @ 11.98 hrs, Volume= 0.227 af, Depth= 1.47"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 25-yr Rainfall=4.51"
Area(sf) CN Description
41,783 39 >75%Grass cover, Good, HSG A
22,903 98 Paved parking, HSG A
15,943 98 Roofs, HSG A
80,629 67 Weighted Average
41,783 51.82% Pervious Area
38,846 48.18% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 2S: SC-2
Runoff = 6.35 cfs @ 11.96 hrs, Volume= 0.344 af, Depth= 3.93"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 25-yr Rainfall=4.51"
Area(sf) CN Description
9,369 96 Gravel surface, HSG A
34,536 98 Paved parking, HSG A
1,793 39 >75%Grass cover, Good, HSG A
45,698 95 Weighted Average
11,162 24.43% Pervious Area
34,536 75.57% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 3S: SC-3
Runoff = 0.92 cfs @ 11.97 hrs, Volume= 0.045 af, Depth= 2.30"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 25-yr Rainfall=4.51"
Area(sf) CN Description
3,471 39 >75%Grass cover, Good, HSG A
6,666 98 Paved parking, HSG A
10,137 78 Weighted Average
3,471 34.24% Pervious Area
6,666 65.76% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 4S: SC-4
Runoff = 1.46 cfs @ 11.96 hrs, Volume= 0.083 af, Depth= 4.27"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 25-yr Rainfall=4.51"
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 25-yr Rainfa11=4.51"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 22
Area(sf) CN Description
10,170 98 Roofs, HSG A
10,170 100.00% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 5S: SC-5
Runoff = 1.25 cfs @ 11.96 hrs, Volume= 0.071 af, Depth= 4.27"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 25-yr Rainfall=4.51"
Area(sf) CN Description
8,725 98 Roofs, HSG A
8,725 100.00% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 6S: SC-6
Runoff = 2.53 cfs @ 11.96 hrs, Volume= 0.144 af, Depth= 4.27"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 25-yr Rainfall=4.51"
Area(sf) CN Description
17,654 98 Roofs, HSG A
17,654 100.00% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 7S: SC-7
Runoff = 1.47 cfs @ 11.97 hrs, Volume= 0.071 af, Depth= 2.22"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 25-yr Rainfall=4.51"
Area(sf) CN Description
10,749 98 Paved parking, HSG A
5,970 39 >75%Grass cover, Good, HSG A
16,719 77 Weighted Average
5,970 35.71% Pervious Area
10,749 64.29% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 8S: SC-8
Runoff = 0.20 cfs @ 11.99 hrs, Volume= 0.011 af, Depth= 0.80"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 25-yr Rainfall=4.51"
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 25-yr Rainfa11=4.51"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 23
Area(sf) CN Description
2,002 98 Paved parking, HSG A
4,947 39 >75%Grass cover, Good, HSG A
6,949 56 Weighted Average
4,947 71.19% Pervious Area
2,002 28.81% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 9S: SC-9
Runoff = 3.09 cfs @ 11.98 hrs, Volume= 0.149 af, Depth= 1.54"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 25-yr Rainfall=4.51"
Area(sf) CN Description
25,759 39 >75%Grass cover, Good, HSG A
24,828 98 Paved parking, HSG A
50,587 68 Weighted Average
25,759 50.92% Pervious Area
24,828 49.08% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Pond 1P: Infiltration Basin #1
Inflow Area= 3.972 ac, 67.39% Impervious, Inflow Depth = 1.96" for 25-yr event
Inflow = 15.71 cfs @ 11.99 hrs, Volume= 0.649 af
OutFlow = 1.48 cfs @ 12.05 hrs, Volume= 0.654 af, Atten=91%, Lag=3.4 min
Discarded = 1.48 cfs @ 12.05 hrs, Volume= 0.654 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Starting Elev=322.00' Surf.Area=4,490 sf Storage=4,003 cf
Peak Elev=323.33'@ 12.32 hrs Surf.Area= 5,322 sf Storage= 14,145 cf (10,142 cf above start)
Flood Elev=325.00' Surf.Area=5,322 sf Storage=30,354 cf (26,351 cf above start)
Plug-Flow detention time=151.4 min calculated for 0.562 af(87%of inflow)
Center-of-Mass det. time=39.9 min ( 841.7-801.8)
Volume Invert Avail.Storage Storage Description
#1 319.00' 6,434 cf Forebay(Irregular)Listed below(Recalc)-Impervious
#2 322.00' 4,900 cf Infiltration (Irregular)Listed below(Recalc)
#3 323.00' 30,725 cf Storage(Irregular)Listed below(Recalc)-Impervious
42,060 cf Total Available Storage
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
319.00 653 133.9 0 0 653
320.00 1,074 151.3 855 855 1,073
321.00 1,561 170.9 1,310 2,165 1,601
322.00 2,131 196.9 1,839 4,003 2,383
323.00 2,744 218.3 2,431 6,434 3,120
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
322.00 4,490 266.6 0 0 4,490
323.00 5,322 286.9 4,900 4,900 5,426
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 25-yr Rainfa11=4.51"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 24
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
323.00 8,196 425.3 0 0 8,196
324.00 9,495 445.5 8,838 8,838 9,662
325.00 10,885 466.9 10,182 19,020 11,281
326.00 12,546 590.3 11,706 30,725 21,676
Device Routing Invert Outlet Devices
#1 Discarded 322.00' 12.000 in/hr Exfiltration over Horizontal area
Discarded OutFlow Max=1.48 cfs @ 12.05 hrs HW=323.13' (Free Discharge)
L1=Exfiltration (Exfiltration Controls 1.48 cfs)
Summary for Pond 2P: Infiltration Basin #2
Inflow Area= 1.161 ac, 49.08% Impervious, Inflow Depth = 1.54" for 25-yr event
Inflow = 3.14 cfs @ 11.98 hrs, Volume= 0.149 af
OutFlow = 1.54 cfs @ 12.07 hrs, Volume= 0.149 af, Atten=51%, Lag=5.6 min
Discarded = 1.54 cfs @ 12.07 hrs, Volume= 0.149 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=326.70'@ 12.07 hrs Surf.Area= 5,553 sf Storage= 1,314 cf
Flood Elev=327.00' Surf.Area= 12,188 sf Storage=3,888 cf
Plug-Flow detention time=8.2 min calculated for 0.149 af(100%of inflow)
Center-of-Mass det. time=8.1 min ( 863.5-855.3)
Volume Invert Avail.Storage Storage Description
#1 326.00' 3,888 cf Custom Stage Data(Irregular�isted below(Recalc)
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
326.00 100 100.0 0 0 100
326.50 2,507 404.6 518 518 12,332
327.00 12,188 676.5 3,370 3,888 35,725
Device Routing Invert Outlet Devices
#1 Discarded 326.00' 12.000 in/hr Exfiltration over Horizontal area
Discarded OutFlow Max=1.52 cfs @ 12.07 hrs HW=326.70' (Free Discharge)
L1=Exfiltration (Exfiltration Controls 1.52 cfs)
Summary for Pond 3P: CB-1
Inflow Area= 1.716 ac, 80.42% Impervious, Inflow Depth = 2.80" for 25-yr event
Inflow = 9.33 cfs @ 12.00 hrs, Volume= 0.400 af
OutFlow = 9.33 cfs @ 12.00 hrs, Volume= 0.400 af, Atten=0%, Lag= 0.0 min
Primary = 9.33 cfs @ 12.00 hrs, Volume= 0.400 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=324.30'@ 11.99 hrs
Flood Elev=326.50'
Device Routing Invert Outlet Devices
#1 Primary 322.50' 24.0" Round Culvert L= 105.0' CPP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=322.50'/322.20' S=0.0029'/' Cc=0.900
n=0.012 Corrugated PP, smooth interior, FlowArea=3.14 sf
Primary OutFlow Max=9.08 cfs @ 12.00 hrs HW=324.26' (Free Discharge)
L1=Culvert (Barrel Controls 9.08 cfs @ 4.12 fps)
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 25-yr Rainfa11=4.51"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 25
Summary for Pond 4P: Swale
Inflow Area= 0.666 ac, 88.04% Impervious, Inflow Depth = 1.27" for 25-yr event
Inflow = 3.50 cfs @ 11.97 hrs, Volume= 0.070 af
OutFlow = 3.50 cfs @ 12.01 hrs, Volume= 0.056 af, Atten=0%, Lag=2.5 min
Primary = 3.50 cfs @ 12.01 hrs, Volume= 0.056 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=329.01'@ 12.01 hrs Surf.Area= 1,177 sf Storage=909 cf
Flood Elev=329.50' Surf.Area= 1,705 sf Storage= 1,606 cf
Plug-Flow detention time=93.5 min calculated for 0.056 af(79%of inflow)
Center-of-Mass det. time=26.0 min ( 814.9-789.0)
Volume Invert Avail.Storage Storage Description
#1 327.75' 1,606 cf Custom Stage Data(Irregular�isted below(Recalc)
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
327.75 345 236.0 0 0 345
329.00 1,164 300.7 893 893 3,129
329.50 1,705 397.2 713 1,606 8,491
Device Routing Invert Outlet Devices
#1 Primary 324.25' 15.0" Round Culvert L= 166.0' CPP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=324.25'/323.25' S=0.0060'/' Cc=0.900
n=0.012 Corrugated PP, smooth interior, FlowArea= 1.23 sf
#2 Device 1 328.75' 24.0"x 24.0" Horiz. Orifice/Grate C=0.600 Limited to weir flow at low heads
Primary OutFlow Max=3.18 cfs @ 12.01 hrs HW=329.00' (Free Discharge)
L1=Culvert (Passes 3.18 cfs of 9.16 cfs potential flow)
L2=0rifice/Grate (Weir Controls 3.18 cfs @ 1.62 fps)
Summary for Pond 5P: Eave Trench
InflowArea= 0.233 ac,100.00% Impervious, Inflow Depth = 4.27" for 25-yr event
Inflow = 1.46 cfs @ 11.96 hrs, Volume= 0.083 af
OutFlow = 1.47 cfs @ 11.98 hrs, Volume= 0.083 af, Atten=0%, Lag= 1.0 min
Discarded = 0.22 cfs @ 11.65 hrs, Volume= 0.070 af
Primary = 1.25 cfs @ 11.98 hrs, Volume= 0.013 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=331.25'@ 11.98 hrs Surf.Area= 320 sf Storage=468 cf
Flood Elev=331.60' Surf.Area=320 sf Storage=512 cf
Plug-Flow detention time=7.4 min calculated for 0.083 af(100%of inflow)
Center-of-Mass det. time=7.4 min (753.1 -745.7)
Volume Invert Avail.Storage Storage Description
#1 327.60' 512 cf 4.00'W x 80.00'L x 4.00'H Stone
1,280 cf Overall x 40.0%Voids
Device Routing Invert Outlet Devices
#1 Primary 328.60' 8.0" Round Culvert L=28.0' CPP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=328.60'/328.05' S=0.0196'/' Cc=0.900
n=0.012 Corrugated PP, smooth interior, FlowArea=0.35 sf
#2 Device 1 331.10' 24.0" Horiz. Orifice/Grate C=0.600 Limited to weir flow at low heads
#3 Discarded 327.60' 30.000 in/hr Exfiltration over Horizontal area
Discarded OutFlow Max=0.22 cfs @ 11.65 hrs HW=327.68' (Free Discharge)
L3=Exfiltration (Exfiltration Controls 0.22 cfs)
Primary OutFlow Max=1.17 cfs @ 11.98 hrs HW=331.25' (Free Discharge)
L1=Culvert (Passes 1.17 cfs of 2.02 cfs potential flow)
L2=0rifice/Grate (Weir Controls 1.17 cfs @ 1.26 fps)
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 25-yr Rainfa11=4.51"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 26
Summary for Pond 6P: Eave Trench
InflowArea= 0.200 ac,100.00% Impervious, Inflow Depth = 4.27" for 25-yr event
Inflow = 1.25 cfs @ 11.96 hrs, Volume= 0.071 af
OutFlow = 1.48 cfs @ 11.96 hrs, Volume= 0.071 af, Atten=0%, Lag= 0.0 min
Discarded = 0.18 cfs @ 11.65 hrs, Volume= 0.059 af
Primary = 1.30 cfs @ 11.96 hrs, Volume= 0.012 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=330.75'@ 11.95 hrs Surf.Area=264 sf Storage=386 cf
Flood Elev=331.10' Surf.Area=264 sf Storage=422 cf
Plug-Flow detention time=(not calculated: outflow precedes inflow)
Center-of-Mass det. time=7.2 min (753.0-745.7)
Volume Invert Avail.Storage Storage Description
#1 327.10' 422 cf 4.00'W x 66.00'L x 4.00'H Stone
1,056 cf Overall x 40.0%Voids
Device Routing Invert Outlet Devices
#1 Primary 328.08' 8.0" Round Culvert L= 13.0' CPP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=328.08'/327.85' S=0.0177'/' Cc=0.900
n=0.012 Corrugated PP, smooth interior, FlowArea=0.35 sf
#2 Device 1 330.60' 24.0" Horiz. Orifice/Grate C=0.600 Limited to weir flow at low heads
#3 Discarded 327.10' 30.000 in/hr Exfiltration over Horizontal area
Discarded OutFlow Max=0.18 cfs @ 11.65 hrs HW=327.18' (Free Discharge)
L3=Exfiltration (Exfiltration Controls 0.18 cfs)
Primary OutFlow Max=1.13 cfs @ 11.96 hrs HW=330.74' (Free Discharge)
L1=Culvert (Passes 1.13 cfs of 2.03 cfs potential flow)
L2=0rifice/Grate (Weir Controls 1.13 cfs @ 1.24 fps)
Summary for Pond 7P: Drywell #1
Inflow Area= 0.384 ac, 64.29% Impervious, Inflow Depth = 2.22" for 25-yr event
Inflow = 1.47 cfs @ 11.97 hrs, Volume= 0.071 af
OutFlow = 0.29 cfs @ 12.17 hrs, Volume= 0.071 af, Atten=80%, Lag= 11.6 min
Discarded = 0.29 cfs @ 12.17 hrs, Volume= 0.071 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=330.07'@ 12.15 hrs Surf.Area= 1,035 sf Storage= 1,114 cf
Plug-Flow detention time=57.9 min calculated for 0.071 af(100%of inflow)
Center-of-Mass det. time=57.8 min ( 889.2-831.4)
Volume Invert Avail.Storage Storage Description
#1 322.58' 673 cf Stone(Irregular)Listed below(Recalc)
2,153 cf Overall-469 cf Embedded= 1,683 cf x 40.0%Voids
#2 323.58' 394 cf 7.33'D x 4.67'H Drywell x 2 Inside#1
469 cf Overall-4.0"Wall Thickness= 394 cf
#3 329.75' 683 cf Ponding (Irregular)Listed below(Recalc)
1,751 cf Total Available Storage
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
322.58 196 53.5 0 0 196
328.25 600 89.1 2,153 2,153 768
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
329.75 6 10.0 0 0 6
330.00 235 57.5 23 23 261
330.50 2,899 273.8 660 683 5,964
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 25-yr Rainfa11=4.51"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 27
Device Routing Invert Outlet Devices
#1 Discarded 322.58' 12.000 in/hr Exfiltration over Horizontal area
Discarded OutFlow Max=0.28 cfs @ 12.17 hrs HW=330.07' (Free Discharge)
L1=Exfiltration (Exfiltration Controls 0.28 cfs)
Summary for Pond 8P: Drywell #2
InflowArea= 0.160 ac, 28.81% Impervious, Inflow Depth = 0.80" for 25-yr event
Inflow = 0.20 cfs @ 11.99 hrs, Volume= 0.011 af
OutFlow = 0.04 cfs @ 12.20 hrs, Volume= 0.011 af, Atten=78%, Lag= 12.3 min
Discarded = 0.04 cfs @ 12.20 hrs, Volume= 0.011 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=324.21'@ 12.20 hrs Surf.Area= 152 sf Storage=92 cf
Plug-Flow detention time=13.5 min calculated for 0.011 af(100%of inflow)
Center-of-Mass det. time= 13.5 min ( 910.1 -896.6)
Volume Invert Avail.Storage Storage Description
#1 322.58' 401 cf 10.67'D x 5.67'H Stone Z=1.0
1,237 cf Overall-235 cf Embedded= 1,002 cf x 40.0%Voids
#2 323.58' 197 cf 7.33'D x 4.67'H Drywell Inside#1
235 cf Overall-4.0"Wall Thickness= 197 cf
#3 329.75' 245 cf Ponding (Irregular)Listed below(Recalc)-Impervious
843 cf Total Available Storage
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
329.75 6 10.0 0 0 6
330.00 116 38.7 12 12 117
330.50 949 116.0 233 245 1,070
Device Routing Invert Outlet Devices
#1 Discarded 322.58' 12.000 in/hr Exfiltration over Horizontal area
Discarded OutFlow Max=0.04 cfs @ 12.20 hrs HW=324.21' (Free Discharge)
L1=Exfiltration (Exfiltration Controls 0.04 cfs)
Summary for Pond 9P: Eave Trench
InflowArea= 0.405 ac,100.00% Impervious, Inflow Depth = 4.27" for 25-yr event
Inflow = 2.53 cfs @ 11.96 hrs, Volume= 0.144 af
OutFlow = 2.25 cfs @ 12.01 hrs, Volume= 0.144 af, Atten= 11%, Lag=3.2 min
Discarded = 0.40 cfs @ 11.65 hrs, Volume= 0.122 af
Primary = 1.80 cfs @ 12.02 hrs, Volume= 0.022 af
Secondary= 0.06 cfs @ 12.00 hrs, Volume= 0.000 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=331.28'@ 12.00 hrs Surf.Area= 576 sf Storage=916 cf
Flood Elev=331.30' Surf.Area=576 sf Storage=922 cf
Plug-Flow detention time=(not calculated: outflow precedes inflow)
Center-of-Mass det. time=7.5 min (753.2-745.7)
Volume Invert Avail.Storage Storage Description
#1 327.30' 922 cf 4.00'W x 144.00'L x 4.00'H Stone
2,304 cf Overall x 40.0%Voids
Device Routing Invert Outlet Devices
#1 Primary 328.30' 8.0" Round Culvert L= 184.0' CPP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=328.30'/326.46' S=0.0100'/' Cc=0.900
n=0.012 Corrugated PP, smooth interior, FlowArea=0.35 sf
#2 Device 1 330.80' 24.0" Horiz. Orifice/Grate C=0.600 Limited to weir flow at low heads
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 25-yr Rainfa11=4.51"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 28
#3 Discarded 327.30' 30.000 in/hr Exfiltration over Horizontal area
#4 Secondary 331.25' 5.0' long x 144.0' breadth Broad-Crested Rectangular Weir
Head(feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63
Discarded OutFlow Max=0.40 cfs @ 11.65 hrs HW=327.37' (Free Discharge)
L3=Exfiltration (Exfiltration Controls 0.40 cfs)
Primary OutFlow Max=1.75 cfs @ 12.02 hrs HW=331.19' (Free Discharge)
L1=Culvert (Barrel Controls 1.75 cfs @ 5.03 fps)
L2=0rifice/Grate (Passes 1.75 cfs of 4.97 cfs potential flow)
Secondary OutFlow Max=0.05 cfs @ 12.00 hrs HW=331.27' (Free Discharge)
L4=Broad-Crested Rectangular Weir(Weir Controls 0.05 cfs @ 0.41 fps)
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 100-yr Rainfa11=6.13"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 29
Time span=0.00-48.00 hrs, dt=0.05 hrs, 961 points
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN
Reach routing by Stor-Ind method - Pond routing by Stor-Ind method
Subcatchment1S:SC-1 Runoff Area=80,629 sf 48.18%Impervious Runoff Depth=2.63"
Tc=6.0 min CN=67 Runoff=8.48 cfs 0.405 af
Subcatchment2S:SC-2 Runoff Area=45,698 sf 75.57%Impervious Runoff Depth=5.54"
Tc=6.0 min CN=95 Runoff=8.76 cfs 0.484 af
Subcatchment3S:SC-3 Runoff Area=10,137 sf 65.76%Impervious Runoff Depth=3.69"
Tc=6.0 min CN=78 Runoff=1.46 cfs 0.072 af
Subcatchment4S:SC-4 Runoff Area=10,170 sf 100.00% Impervious Runoff Depth=5.89"
Tc=6.0 min CN=98 Runoff=1.98 cfs 0.115 af
Subcatchment5S:SC-5 Runoff Area=8,725 sf 100.00%Impervious Runoff Depth=5.89"
Tc=6.0 min CN=98 Runoff=1.70 cfs 0.098 af
Subcatchment6S:SC-6 Runoff Area=17,654 sf 100.00% Impervious Runoff Depth=5.89"
Tc=6.0 min CN=98 Runoff=3.45 cfs 0.199 af
Subcatchment7S:SC-7 Runoff Area=16,719 sf 64.29%Impervious Runoff Depth=3.59"
Tc=6.0 min CN=77 Runoff=2.35 cfs 0.115 af
Subcatchment8S:SC-8 Runoff Area=6,949 sf 28.81%Impervious Runoff Depth=1.67"
Tc=6.0 min CN=56 Runoff=0.45 cfs 0.022 af
Subcatchment9S:SC-9 Runoff Area=50,587 sf 49.08%Impervious Runoff Depth=2.72"
Tc=6.0 min CN=68 Runoff=5.45 cfs 0.263 af
Pond 1 P:Infiltration Basin#1 Peak Elev=324.32' Storage=23,269 cf Inflow=23.70 cfs 1.031 af
Outflow=1.48 cfs 1.037 af
Pond 2P:Infiltration Basin#2 Peak Elev=326.91' Storage=2,917 cf Inflow=6.72 cfs 0.272 af
Outflow=2.77 cfs 0.272 af
Pond 3P:CB-1 Peak Elev=324.87' Inflow=13.51 cfs 0.591 af
24.0" Round Culvert n=0.012 L=105.0' S=0.0029'/' Outflow=13.51 cfs 0.591 af
Pond 4P:Swale Peak EIev=329.07' Storage=981 cf Inflow=4.85 cfs 0.121 af
Outflow=4.78 cfs 0.107 af
Pond 5P: Eave Trench Peak Elev=331.29' Storage=473 cf Inflow=1.98 cfs 0.115 af
Discarded=0.22 cfs 0.088 af Primary=1.71 cfs 0.026 af Outflow=1.94 cfs 0.115 af
Pond 6P: Eave Trench Peak EIev=330.79' Storage=389 cf Inflow=1.70 cfs 0.098 af
Discarded=0.18 cfs 0.075 af Primary=1.65 cfs 0.023 af Outflow=1.83 cfs 0.098 af
Pond 7P: Drywell#1 Peak EIev=330.46' Storage=1,652 cf Inflow=2.35 cfs 0.115 af
Outflow=0.89 cfs 0.115 af
Pond 8P: Drywell#2 Peak Elev=326.14' Storage=288 cf Inflow=0.45 cfs 0.022 af
Outflow=0.07 cfs 0.022 af
Pond 9P: Eave Trench Peak Elev=331.49' Storage=922 cf Inflow=3.45 cfs 0.199 af
Discarded=0.40 cfs 0.155 af Primary=1.81 cfs 0.035 af Secondary=1.28 cfs 0.009 af Outflow=3.49 cfs 0.199 af
Total Runoff Area= 5.676 ac Runoff Volume= 1.774 af Average Runoff Depth =3.75"
37.65% Pervious=2.137 ac 62.35% Impervious=3.539 ac
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 100-yr Rainfa11=6.13"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 30
Summary for Subcatchment 1S: SC-1
Runoff = 8.48 cfs @ 11.98 hrs, Volume= 0.405 af, Depth= 2.63"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 100-yr Rainfall=6.13"
Area(sf) CN Description
41,783 39 >75%Grass cover, Good, HSG A
22,903 98 Paved parking, HSG A
15,943 98 Roofs, HSG A
80,629 67 Weighted Average
41,783 51.82% Pervious Area
38,846 48.18% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 2S: SC-2
Runoff = 8.76 cfs @ 11.96 hrs, Volume= 0.484 af, Depth= 5.54"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 100-yr Rainfall=6.13"
Area(sf) CN Description
9,369 96 Gravel surface, HSG A
34,536 98 Paved parking, HSG A
1,793 39 >75%Grass cover, Good, HSG A
45,698 95 Weighted Average
11,162 24.43% Pervious Area
34,536 75.57% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 3S: SC-3
Runoff = 1.46 cfs @ 11.97 hrs, Volume= 0.072 af, Depth= 3.69"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 100-yr Rainfall=6.13"
Area(sf) CN Description
3,471 39 >75%Grass cover, Good, HSG A
6,666 98 Paved parking, HSG A
10,137 78 Weighted Average
3,471 34.24% Pervious Area
6,666 65.76% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 4S: SC-4
Runoff = 1.98 cfs @ 11.96 hrs, Volume= 0.115 af, Depth= 5.89"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 100-yr Rainfall=6.13"
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 100-yr Rainfa11=6.13"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 31
Area(sf) CN Description
10,170 98 Roofs, HSG A
10,170 100.00% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 5S: SC-5
Runoff = 1.70 cfs @ 11.96 hrs, Volume= 0.098 af, Depth= 5.89"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 100-yr Rainfall=6.13"
Area(sf) CN Description
8,725 98 Roofs, HSG A
8,725 100.00% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 6S: SC-6
Runoff = 3.45 cfs @ 11.96 hrs, Volume= 0.199 af, Depth= 5.89"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 100-yr Rainfall=6.13"
Area(sf) CN Description
17,654 98 Roofs, HSG A
17,654 100.00% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 7S: SC-7
Runoff = 2.35 cfs @ 11.97 hrs, Volume= 0.115 af, Depth= 3.59"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 100-yr Rainfall=6.13"
Area(sf) CN Description
10,749 98 Paved parking, HSG A
5,970 39 >75%Grass cover, Good, HSG A
16,719 77 Weighted Average
5,970 35.71% Pervious Area
10,749 64.29% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 8S: SC-8
Runoff = 0.45 cfs @ 11.98 hrs, Volume= 0.022 af, Depth= 1.67"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 100-yr Rainfall=6.13"
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 100-yr Rainfa11=6.13"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 32
Area(sf) CN Description
2,002 98 Paved parking, HSG A
4,947 39 >75%Grass cover, Good, HSG A
6,949 56 Weighted Average
4,947 71.19% Pervious Area
2,002 28.81% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Subcatchment 9S: SC-9
Runoff = 5.45 cfs @ 11.97 hrs, Volume= 0.263 af, Depth= 2.72"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-48.00 hrs, dt= 0.05 hrs
Type II 24-hr 100-yr Rainfall=6.13"
Area(sf) CN Description
25,759 39 >75%Grass cover, Good, HSG A
24,828 98 Paved parking, HSG A
50,587 68 Weighted Average
25,759 50.92% Pervious Area
24,828 49.08% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
6.0 Direct Entry,
Summary for Pond 1P: Infiltration Basin #1
Inflow Area= 3.972 ac, 67.39% Impervious, Inflow Depth = 3.12" for 100-yr event
Inflow = 23.70 cfs @ 11.97 hrs, Volume= 1.031 af
OutFlow = 1.48 cfs @ 11.95 hrs, Volume= 1.037 af, Atten=94%, Lag=0.0 min
Discarded = 1.48 cfs @ 11.95 hrs, Volume= 1.037 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Starting Elev=322.00' Surf.Area=4,490 sf Storage=4,003 cf
Peak Elev=324.32'@ 12.55 hrs Surf.Area= 5,322 sf Storage=23,269 cf (19,265 cf above start)
Flood Elev=325.00' Surf.Area=5,322 sf Storage=30,354 cf (26,351 cf above start)
Plug-Flow detention time=180.1 min calculated for 0.945 af(92%of inflow)
Center-of-Mass det. time=95.5 min ( 889.0-793.5)
Volume Invert Avail.Storage Storage Description
#1 319.00' 6,434 cf Forebay(Irregular)Listed below(Recalc)-Impervious
#2 322.00' 4,900 cf Infiltration (Irregular)Listed below(Recalc)
#3 323.00' 30,725 cf Storage(Irregular)Listed below(Recalc)-Impervious
42,060 cf Total Available Storage
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
319.00 653 133.9 0 0 653
320.00 1,074 151.3 855 855 1,073
321.00 1,561 170.9 1,310 2,165 1,601
322.00 2,131 196.9 1,839 4,003 2,383
323.00 2,744 218.3 2,431 6,434 3,120
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
322.00 4,490 266.6 0 0 4,490
323.00 5,322 286.9 4,900 4,900 5,426
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 100-yr Rainfa11=6.13"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 33
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
323.00 8,196 425.3 0 0 8,196
324.00 9,495 445.5 8,838 8,838 9,662
325.00 10,885 466.9 10,182 19,020 11,281
326.00 12,546 590.3 11,706 30,725 21,676
Device Routing Invert Outlet Devices
#1 Discarded 322.00' 12.000 in/hr Exfiltration over Horizontal area
Discarded OutFlow Max=1.48 cfs @ 11.95 hrs HW=323.13' (Free Discharge)
L1=Exfiltration (Exfiltration Controls 1.48 cfs)
Summary for Pond 2P: Infiltration Basin #2
Inflow Area= 1.161 ac, 49.08% Impervious, Inflow Depth = 2.81" for 100-yr event
Inflow = 6.72 cfs @ 11.97 hrs, Volume= 0.272 af
OutFlow = 2.77 cfs @ 12.07 hrs, Volume= 0.272 af, Atten=59%, Lag=6.0 min
Discarded = 2.77 cfs @ 12.07 hrs, Volume= 0.272 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=326.91'@ 12.07 hrs Surf.Area= 9,960 sf Storage=2,917 cf
Flood Elev=327.00' Surf.Area= 12,188 sf Storage=3,888 cf
Plug-Flow detention time=10.6 min calculated for 0.272 af(100%of inflow)
Center-of-Mass det. time= 10.6 min ( 845.2-834.6)
Volume Invert Avail.Storage Storage Description
#1 326.00' 3,888 cf Custom Stage Data(Irregular�isted below(Recalc)
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
326.00 100 100.0 0 0 100
326.50 2,507 404.6 518 518 12,332
327.00 12,188 676.5 3,370 3,888 35,725
Device Routing Invert Outlet Devices
#1 Discarded 326.00' 12.000 in/hr Exfiltration over Horizontal area
Discarded OutFlow Max=2.73 cfs @ 12.07 hrs HW=326.91' (Free Discharge)
L1=Exfiltration (Exfiltration Controls 2.73 cfs)
Summary for Pond 3P: CB-1
Inflow Area= 1.716 ac, 80.42% Impervious, Inflow Depth = 4.13" for 100-yr event
Inflow = 13.51 cfs @ 11.97 hrs, Volume= 0.591 af
OutFlow = 13.51 cfs @ 11.97 hrs, Volume= 0.591 af, Atten=0%, Lag= 0.0 min
Primary = 13.51 cfs @ 11.97 hrs, Volume= 0.591 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=324.87'@ 11.97 hrs
Flood Elev=326.50'
Device Routing Invert Outlet Devices
#1 Primary 322.50' 24.0" Round Culvert L= 105.0' CPP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=322.50'/322.20' S=0.0029'/' Cc=0.900
n=0.012 Corrugated PP, smooth interior, FlowArea=3.14 sf
Primary OutFlow Max=13.00 cfs @ 11.97 hrs HW=324.80' (Free Discharge)
L1=Culvert (Barrel Controls 13.00 cfs @ 4.51 fps)
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 100-yr Rainfa11=6.13"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 34
Summary for Pond 4P: Swale
Inflow Area= 0.666 ac, 88.04% Impervious, Inflow Depth = 2.18" for 100-yr event
Inflow = 4.85 cfs @ 11.98 hrs, Volume= 0.121 af
OutFlow = 4.78 cfs @ 11.97 hrs, Volume= 0.107 af, Atten= 1%, Lag= 0.0 min
Primary = 4.78 cfs @ 11.97 hrs, Volume= 0.107 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=329.07'@ 11.97 hrs Surf.Area= 1,237 sf Storage=981 cf
Flood Elev=329.50' Surf.Area= 1,705 sf Storage= 1,606 cf
Plug-Flow detention time=65.6 min calculated for 0.106 af(88%of inflow)
Center-of-Mass det. time= 16.5 min (792.4-776.0)
Volume Invert Avail.Storage Storage Description
#1 327.75' 1,606 cf Custom Stage Data(Irregular�isted below(Recalc)
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
327.75 345 236.0 0 0 345
329.00 1,164 300.7 893 893 3,129
329.50 1,705 397.2 713 1,606 8,491
Device Routing Invert Outlet Devices
#1 Primary 324.25' 15.0" Round Culvert L= 166.0' CPP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=324.25'/323.25' S=0.0060'/' Cc=0.900
n=0.012 Corrugated PP, smooth interior, FlowArea= 1.23 sf
#2 Device 1 328.75' 24.0"x 24.0" Horiz. Orifice/Grate C=0.600 Limited to weir flow at low heads
Primary OutFlow Max=4.52 cfs @ 11.97 hrs HW=329.06' (Free Discharge)
L1=Culvert (Passes 4.52 cfs of 9.22 cfs potential flow)
L2=0rifice/Grate (Weir Controls 4.52 cfs @ 1.82 fps)
Summary for Pond 5P: Eave Trench
InflowArea= 0.233 ac,100.00% Impervious, Inflow Depth = 5.89" for 100-yr event
Inflow = 1.98 cfs @ 11.96 hrs, Volume= 0.115 af
OutFlow = 1.94 cfs @ 11.97 hrs, Volume= 0.115 af, Atten=2%, Lag= 0.8 min
Discarded = 0.22 cfs @ 11.60 hrs, Volume= 0.088 af
Primary = 1.71 cfs @ 11.97 hrs, Volume= 0.026 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=331.29'@ 11.97 hrs Surf.Area= 320 sf Storage=473 cf
Flood Elev=331.60' Surf.Area=320 sf Storage=512 cf
Plug-Flow detention time=(not calculated: outflow precedes inflow)
Center-of-Mass det. time=6.8 min (747.4-740.7)
Volume Invert Avail.Storage Storage Description
#1 327.60' 512 cf 4.00'W x 80.00'L x 4.00'H Stone
1,280 cf Overall x 40.0%Voids
Device Routing Invert Outlet Devices
#1 Primary 328.60' 8.0" Round Culvert L=28.0' CPP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=328.60'/328.05' S=0.0196'/' Cc=0.900
n=0.012 Corrugated PP, smooth interior, FlowArea=0.35 sf
#2 Device 1 331.10' 24.0" Horiz. Orifice/Grate C=0.600 Limited to weir flow at low heads
#3 Discarded 327.60' 30.000 in/hr Exfiltration over Horizontal area
Discarded OutFlow Max=0.22 cfs @ 11.60 hrs HW=327.65' (Free Discharge)
L3=Exfiltration (Exfiltration Controls 0.22 cfs)
Primary OutFlow Max=1.69 cfs @ 11.97 hrs HW=331.29' (Free Discharge)
L1=Culvert (Passes 1.69 cfs of 2.04 cfs potential flow)
L2=0rifice/Grate (Weir Controls 1.69 cfs @ 1.42 fps)
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 100-yr Rainfa11=6.13"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 35
Summary for Pond 6P: Eave Trench
InflowArea= 0.200 ac,100.00% Impervious, Inflow Depth = 5.89" for 100-yr event
Inflow = 1.70 cfs @ 11.96 hrs, Volume= 0.098 af
OutFlow = 1.83 cfs @ 11.99 hrs, Volume= 0.098 af, Atten=0%, Lag= 1.6 min
Discarded = 0.18 cfs @ 11.60 hrs, Volume= 0.075 af
Primary = 1.65 cfs @ 11.99 hrs, Volume= 0.023 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=330.79'@ 11.99 hrs Surf.Area=264 sf Storage=389 cf
Flood Elev=331.10' Surf.Area=264 sf Storage=422 cf
Plug-Flow detention time=(not calculated: outflow precedes inflow)
Center-of-Mass det. time=6.7 min (747.4-740.7)
Volume Invert Avail.Storage Storage Description
#1 327.10' 422 cf 4.00'W x 66.00'L x 4.00'H Stone
1,056 cf Overall x 40.0%Voids
Device Routing Invert Outlet Devices
#1 Primary 328.08' 8.0" Round Culvert L= 13.0' CPP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=328.08'/327.85' S=0.0177'/' Cc=0.900
n=0.012 Corrugated PP, smooth interior, FlowArea=0.35 sf
#2 Device 1 330.60' 24.0" Horiz. Orifice/Grate C=0.600 Limited to weir flow at low heads
#3 Discarded 327.10' 30.000 in/hr Exfiltration over Horizontal area
Discarded OutFlow Max=0.18 cfs @ 11.60 hrs HW=327.16' (Free Discharge)
L3=Exfiltration (Exfiltration Controls 0.18 cfs)
Primary OutFlow Max=1.53 cfs @ 11.99 hrs HW=330.78' (Free Discharge)
L1=Culvert (Passes 1.53 cfs of 2.04 cfs potential flow)
L2=0rifice/Grate (Weir Controls 1.53 cfs @ 1.38 fps)
Summary for Pond 7P: Drywell #1
Inflow Area= 0.384 ac, 64.29% Impervious, Inflow Depth = 3.59" for 100-yr event
Inflow = 2.35 cfs @ 11.97 hrs, Volume= 0.115 af
OutFlow = 0.89 cfs @ 12.10 hrs, Volume= 0.115 af, Atten=62%, Lag=7.5 min
Discarded = 0.89 cfs @ 12.10 hrs, Volume= 0.115 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=330.46'@ 12.10 hrs Surf.Area= 3,211 sf Storage= 1,652 cf
Plug-Flow detention time=50.1 min calculated for 0.115 af(100%of inflow)
Center-of-Mass det. time=50.1 min ( 867.7-817.6)
Volume Invert Avail.Storage Storage Description
#1 322.58' 673 cf Stone(Irregular)Listed below(Recalc)
2,153 cf Overall-469 cf Embedded= 1,683 cf x 40.0%Voids
#2 323.58' 394 cf 7.33'D x 4.67'H Drywell x 2 Inside#1
469 cf Overall-4.0"Wall Thickness= 394 cf
#3 329.75' 683 cf Ponding (Irregular)Listed below(Recalc)
1,751 cf Total Available Storage
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
322.58 196 53.5 0 0 196
328.25 600 89.1 2,153 2,153 768
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
329.75 6 10.0 0 0 6
330.00 235 57.5 23 23 261
330.50 2,899 273.8 660 683 5,964
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 100-yr Rainfa11=6.13"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 36
Device Routing Invert Outlet Devices
#1 Discarded 322.58' 12.000 in/hr Exfiltration over Horizontal area
Discarded OutFlow Max=0.89 cfs @ 12.10 hrs HW=330.46' (Free Discharge)
L1=Exfiltration (Exfiltration Controls 0.89 cfs)
Summary for Pond 8P: Drywell #2
InflowArea= 0.160 ac, 28.81% Impervious, Inflow Depth = 1.67" for 100-yr event
Inflow = 0.45 cfs @ 11.98 hrs, Volume= 0.022 af
OutFlow = 0.07 cfs @ 12.29 hrs, Volume= 0.022 af, Atten=85%, Lag= 18.5 min
Discarded = 0.07 cfs @ 12.29 hrs, Volume= 0.022 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=326.14'@ 12.29 hrs Surf.Area=249 sf Storage=288 cf
Plug-Flow detention time=35.0 min calculated for 0.022 af(100%of inflow)
Center-of-Mass det. time=35.0 min ( 904.3-869.3)
Volume Invert Avail.Storage Storage Description
#1 322.58' 401 cf 10.67'D x 5.67'H Stone Z=1.0
1,237 cf Overall-235 cf Embedded= 1,002 cf x 40.0%Voids
#2 323.58' 197 cf 7.33'D x 4.67'H Drywell Inside#1
235 cf Overall-4.0"Wall Thickness= 197 cf
#3 329.75' 245 cf Ponding (Irregular)Listed below(Recalc)-Impervious
843 cf Total Available Storage
Elevation Surf.Area Perim. Inc.Store Cum.Store Wet.Area
(feet) (sq-ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
329.75 6 10.0 0 0 6
330.00 116 38.7 12 12 117
330.50 949 116.0 233 245 1,070
Device Routing Invert Outlet Devices
#1 Discarded 322.58' 12.000 in/hr Exfiltration over Horizontal area
Discarded OutFlow Max=0.07 cfs @ 12.29 hrs HW=326.14' (Free Discharge)
L1=Exfiltration (Exfiltration Controls 0.07 cfs)
Summary for Pond 9P: Eave Trench
InflowArea= 0.405 ac,100.00% Impervious, Inflow Depth = 5.89" for 100-yr event
Inflow = 3.45 cfs @ 11.96 hrs, Volume= 0.199 af
OutFlow = 3.49 cfs @ 11.97 hrs, Volume= 0.199 af, Atten=0%, Lag= 0.4 min
Discarded = 0.40 cfs @ 11.60 hrs, Volume= 0.155 af
Primary = 1.81 cfs @ 11.95 hrs, Volume= 0.035 af
Secondary= 1.28 cfs @ 11.97 hrs, Volume= 0.009 af
Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt=0.05 hrs
Peak Elev=331.49'@ 11.97 hrs Surf.Area= 576 sf Storage=922 cf
Flood Elev=331.30' Surf.Area=576 sf Storage=922 cf
Plug-Flow detention time=6.9 min calculated for 0.199 af(100%of inflow)
Center-of-Mass det. time=6.9 min (747.6-740.7)
Volume Invert Avail.Storage Storage Description
#1 327.30' 922 cf 4.00'W x 144.00'L x 4.00'H Stone
2,304 cf Overall x 40.0%Voids
Device Routing Invert Outlet Devices
#1 Primary 328.30' 8.0" Round Culvert L= 184.0' CPP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=328.30'/326.46' S=0.0100'/' Cc=0.900
n=0.012 Corrugated PP, smooth interior, FlowArea=0.35 sf
#2 Device 1 330.80' 24.0" Horiz. Orifice/Grate C=0.600 Limited to weir flow at low heads
P:\20-015\e n g\ca I cs\
20-015 DR-PR Type ll 24-hr 100-yr Rainfa11=6.13"
Prepared by Verity Engineering, D.P.C. Printed 2/23/2021
HydroCAD�10.10-5a s/n 09886 OO 2020 HydroCAD Software Solutions LLC Paqe 37
#3 Discarded 327.30' 30.000 in/hr Exfiltration over Horizontal area
#4 Secondary 331.25' 5.0' long x 144.0' breadth Broad-Crested Rectangular Weir
Head(feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63
Discarded OutFlow Max=0.40 cfs @ 11.60 hrs HW=327.34' (Free Discharge)
L3=Exfiltration (Exfiltration Controls 0.40 cfs)
Primary OutFlow Max=1.81 cfs @ 11.95 hrs HW=331.45' (Free Discharge)
L1=Culvert (Barrel Controls 1.81 cfs @ 5.19 fps)
L2=0rifice/Grate (Passes 1.81 cfs of 10.72 cfs potential flow)
Secondary OutFlow Max=1.11 cfs @ 11.97 hrs HW=331.44' (Free Discharge)
L4=Broad-Crested Rectangular Weir(Weir Controls 1.11 cfs @ 1.17 fps)
Appendix K
Weekly Inspection Form
Stormwater Pollution Prevention Plan (SWPPP) K
26 Freedom Way February 2021
� i �' Verity Engineering, D.P.C.
e r� ty P.O.Box 474
V Troy,New York 12180
518.389.7200�verityeng.com
SWPPP INSPECTION REPORT
SITE INFORMATION Report Submitted:
DATE&TIME: PROJECT:
LOCATION:
CONTRACTOR: JOB NO.:
OWNER: WEATHER: Cloudy SOIL: Wet
CONSTRUCTION OBSERVATIONS:
DISTRIBUTION:
❑ Owner Date:
❑ Contractor Date:
❑ Municipality Date:
❑ Site Supt. Date:
Site Inspector/
Qualified Professional:
sign
print
Site Inspector:
sign
print
Page i of�
SITE MAP:
Page z of�
SITE OBSERVATION REPORT Date:
Initials:
Project:
Y�N Maintaining Water Quality
n/a Is there an increase in turbidi causin a substantial visible contrast to natural conditions?
n/a Is there residue from oil and floating substances,visible oil film,or globules or grease?
n/a All disturbances are within the limits of the approved plans.
n/a Have receiving lake/bay,stream,and/or wetland been impacted by silt from the project?
Y�N General Site Conditions
n/a Is construction site litter and debris appropriately managed?
Are facilities and equipment necessary for implementation of erosion and sediment control in working
n/a
OTC12T?
n/a Is construction im actin the ad'acent ro er ?
n/a Is dust ade uatel controlled?
Y�N Tem orar Stream Crossin
n/a Maximum diameter i es necessar to s an creek without dred in are installed?
n/a Installed non-woven eotextile fabric beneath a roaches.
nia ls fill com osed of a re ate(no earth or soil)?
n/a
Rock on approaches is clean enough to remove mud from vehicles&prevent sediment from entering stream
during high flow.
Y�N Excavation Dewatering
n/a Upstream and downstream berms(sandbags,inflatable dams,etc.)are installed per plan.
n/a Clean water from upstream pool is being pumped to the downstream pool.
n/a Sediment laden water from work area is being discharged to a silt-trapping device.
n/a Constructed upstream berm with one-foot minimum freeboard.
Y�N LevelSpreader
n/a Installed per plan.
n/a Constructed on undisturbed soil,not on fill,receiving only clear,non-sediment laden flow.
n/a Flow sheets out of level spreader without erosion on downstream edge.
Y�N Interceptor Dikes and Swales
n/a Installed per plan with minimum side slopes aHaV or flatter.
n/a Stabilized by geotextile fabric,seed,or mulch with no erosion occurring.
n/a Sediment-laden runoff directed to sediment trapping structure.
Y�N Stone Check Dam
n/a Is channel stable?(flow is not eroding soil underneath or around the structure)
n/a Are check dams installed?
n/a Check is in ood condition(rocks in lace and no ermanent ools behind the structure).
n/a Has accumulated sediment been removed?
Y�N Rock Outlet Protection
n/a Installed per plan.
n/a Installed concurrentl with i e installation.
Page 3 of�
SITE OBSERVATION REPORT Date:
Initials:
Project:
Y�N Topsoil and Spoil Stockpiles
n/a Stock iles are stabilized with ve etation and/or mulch.
n/a Sediment control is installed at the toe of slope.
Y�N Re-ve etation
n/a Tem orar seedin and mulch have been a lied to idle areas.
n/a 4-inches minimum of to soil has been a lied under ermanent seedin .
Y�N Stabilized Construction Entrance
n/a Is there a construction entrance?
n/a Installed er standards and s ecifications?
n/a Stone is clean enou h to effectivel remove mud from vehicles.
n/a Does all traffic use the stabilized entrance to enter and leave the site?
n/a Is adequate drainage provided to prevent ponding at entrance?
Y�N Silt Fence
nia lnstalled on contour,io feet from toe of slope(not across conveyance channels).
n/a Joints constructed by wrapping the two ends together for continuous support.
n/a Fabric is buried 6-inches minimum.
n/a Posts are stable,fabric is tight and without rips or frayed areas.
n/a Is silt fence installed in all areas re uired?
Estimated Sediment accumulation is_%of design capacity.
Y�N Storm Drain Inlet Protection
n/a Is storm drain inlet rotection rovided where a licable?
Installed er s ecifications and details?(see below)
nia Excavated-(i'-a'de th,wee holes, ravel filter,min. size: 9ooft3/acre)
nia Fabric-(Posts are stable,fabric is tight,i'embedment)
nia Stone and Blocic-(i'-a'height,blocl<s oriented for dewatering,stone)
nia Curb-(wire mesh,fabric,and stone)
Estimated Sediment accumulation is_%of design capacity.
Y�N Temporary Sediment Trap
n/a Outlet structure is constructed per the approved plan or drawing.
n/a Geotextile fabric has been placed beneath rock fill.
Estimated Sediment accumulation is_%of design capacity.
Y�N Temporary Sediment Basin
n/a Basin and outlet structure constructed per the approved plan.
n/a Basin side slo es are stabilized with seed/mulch.
n/a Draina e structure flushed and basin surface restored u on removal of sediment basin facilit .
Estimated Sediment accumulation is_%of design capacity.
Page q of�
SITE OBSERVATION REPORT Date:
Initials:
Project:
Discharge Point Summary:
Surface Water Body Condition:
Post-Construction SMPs:
Current Corrective Actions:
Previous Corrective Actions:
General Comments:
Page 5 of�
PHOTO LOG Date:
Initials:
Project:
PHOTO#i:
PHOTO#z
Page 6 of�
PHOTO LOG Date:
Initials:
Project:
PHOTO#�:
PHOTO#a:
Page�of�
Appendix L
Post-Construction Operation and Maintenance Checklist
Stormwater Pollution Prevention Plan (SWPPP) L
26 Freedom Way February 2021
� ai DE A
' ' ' ' ' ' = ' � a
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O
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�
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I � 1 " 1 f 'f �� , �J tltVil 4 # Wc.[w 4§r�a�i44 r.iA �' y ~
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Y
, �
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"q'S' h •'9. �, Tv�na-0w
• a ' � 5..-rv� .
An infiltration practice that stores the water qualiiyvolume in a shallow depression,Lieefare it is irH'il#rated into ��v - -- � ��
the ground. `` _ __..�. _ _ ..__.- �
c��arts ��� ��/
���� ���
8� � r � � MAJOR AREAS OF PRACTICE � �~
Drainage Isaues: A, MaintenanCe ACCessway E. Grass Channel I. OutFall
�,. ���aa�8�re xano�lbaitlm�dralr����r�a. B. Inlet 5tructure F. Infiltration Basin Area J. Emergency Spillway
-Remrnre trash and dabris and dispose aff site,as required.
-Stabilize and mow area as required. Remrnre clippings. C. 5tilling Basin G. Underdrain
-Ensure that activities in tha drainage area minimize oill8rease and sediment entry to the system. Q. Concrete Level Spreader H. Qutlet 5tructure
�. �����'c t��Ira"s���s���4L�e3��a�)a��!gss°�i���s�rA d�v��,such as stllling k�sln
(L��ti��r G's.r;,���t���tr�l 5�r�e�ss�a�l�ido�s E}),�an����sa�h�nr��l(�.a�at!¢���. Landecaping:
-Remnve dehris manual ly and dispose off-site,as required.
'�. 6a�s��xer�lf cnrrd�kien�?veSetapan rsn�it�.
-Note any channels,soil exposure,or other evidence of erosion and stabil ize for further maintenance. -Remove vegetative invasives rnanual ly,ensuring roat removal,tn the e�ctent possihle.Refer to Appendix 1:
-Note any cracks in pipe,headwal Vc:oncrete pipe col la,and concrete le+iel spreader. New York 5tate Irnasive Plants fnr key speci�s. Note any significant establishment for future
-Nate any displaced field stona.Remove as required, removal�maintenance.
�. 9m������4�e c���������s������e k��ti L.as���n�9)��as3�;��€!��..t�at6�r�g�. -Relacate rodents and/or provide exclusion devices,as required.
a.Riser Bau -Trim shru6s and cut rass alon streetfronta
g g ges,as required. Dispose of clippings off-site.
-Remrnre debris manual ly and dispase off-site,as required. -Mow grassed areas as required. Mow only when surface is dry to arroid rutting. Dispose of clippings
-Nate any crac4aldamage ta riserlbarrel(see critical maintenance issues box?. off site.
b.Dutfal I Perlmeter 1Yeatmer�t(perlmeter boundarles not shown an flguresl:
-Remove accumulated de6riS/flaata6les near the outfal I spil Iway appraach and discharge channels �' ��������������������,#�����������,�������������
manual ly or by other appraved means;as required.Dispose of debris aff-site. -Remove accumulated litterldebris by hand,dispose off-site.
-Nate any displaced field stone.Remove as required.
� �����p���������ry�������� -5ecure gates,guiderails,signs,and boulders,as required.
-Remove dehris manual ly and dispase off-site,as required.
'I�b� 4�. a',, �'i�.: ' ".'r:4 a �.6's e:�s�'. �..� ..�9 ,"�s: �' '
-Note dewatering time. Faciliiy should drein campletely within 24-48 hours of a storm event.If clogging
accurs,remove sediment and cleanout underdrain(refer to Item 2 of Lang-Term Measures7. Dralnage Issues:
�. ��ss�'[i���a�����s�dB9�ra�{L�iB�at���. ].. P�s��Y th�inlet struelure(Locatian B)�and preteeahnent
$ -Vegetabed arnergency spil Iway channels should be mowed and should not he cut to less than 6 to 8 c����,such as stilling basin{Loe�tion C},cancrete I��e6 1)Risers and barrels
inches in height. �presad�r��.��3�an�),�nd����eh�s�e�1 dP�'��aat�70
� -The emergency spil Iway approach and discharge channels should be cleared af brush and other woody -Repairlreinforca eroded areas,as required. -Presence af corrasian
� �owth. -Repair�racks/damagad stones on headwall,as required. -Weld joint weakness
-After any flow has passed through the emergency spillway,the spillway crest{wntrol section)and exit -Repair cracks in pipe,cancrete pipe collar,or�oncrete -Val�es operational
� channel should be inspected for erosion.Nate location of any eraded areas.Sffibilize far further level spreader,as raquired. -SeCurity key in known loCation
�", maintenance. -Repla�e displaced field s6one,as required. -Clogging of barrel outlets
� �. M��s��w��a:�as;s��;€a 6r��€ra�.����aa��a�a�������r�,
2}Embankments
$ -Remove accumulated de6ris;dispose off-site. -No rodents
g -No trees and shrubs
� -No seepage and settlement
�
_
�I�,I � '�i:' ��o � {' �� s' 'a � 1� i i I '•�'i i N� !i' ' � . i � I r�'. �� ie ' ��
*Facility ahhreviations refer to 20�3 NYSDEC Stormwater Design Manual practice labels
si a� �
�'. I���;�E f��a��s������u�t�,���san�&�o
-Repair crecks,/damage to conerete riser box,as required.
-Replace displaced field stone in outFall,as required. PROFILE
�, ���p����i����r��r���6�+���f������$.
-Repair and stabilize eroded areas in the exit channel as required.
�. e8��a���:��P�E����$��s�R�fl�t3���8�'s. �� 1 � d �a�neatiK.wEr�r—,
-Repairlreinfarce unstable emhankments using field stone,plantings,etc. a �' _ E F H ,� �`�
ril_ `.
� ��@�I��t�ca�p��a��m�s��ls�: B °:����'�ii � � ���r,����
�CiEA�J.ur vuv �
-Remorre dead plants by hand;dispase aff-site;replant as required. ' ,,, T � Y, �+�
-Remave trees that start to row in the�icini of the basin(Location F�, and dis PE""'�`E go" '�f i��""'-
g tY PosB Off-51bE,d5 � ,'• f:ti;� �-�{"Itl
required. �. "
-Note any bare areas. Culti�ate soil and rerregetate as required. Introduce altemative plantings,as � - � ��f� �J ' ,- I
required. F��,�xF�eR�c _ ,i_ = �. i ... •II ;, , "
� i�, i •ni —lii �i. �i i o�— --,.i.�ll,�� ` ii��"I��
6. iae��a�.�,�r�������r������€�������`c��ir����a�+a�.���a�c�������s�����-�s��a��a9zar���r a������r�G. � n�.r,szc�='
�, I�����fm�r herbivcsr�dam��e. `�""E` � ,� "�����;'���
PotfTl-�EEP��OLL'S.R or—°
-Repair hurrowsldamage created by rodents,as required. =��rEc�o�aP�+aP���+
-Introduce alternati�e plantings,as required.
MAJOR AREA5 OF PRAGTICE
Perimeter Treatmer�t(perimeter boundaries not shown on figures): g. Inlet Structure E. Grass Channel H. Outlet 5tructure
�6. �,aa���t�!���,aa�hi��es�es����,�:���air��, I. �utFall
9. �tefutbish ras mtzw�eCess+rr�y,�s requiredo C. Stilling Basin F. Infiltration Basin Area
lfl.Inspc�t and riepair da�maged sidewalks,fencing,guiderail,and signs,as required. D• Concrete Level Spreader G. Underdrain
t r � �,�:. �..... .,' k'.ba�S. 'a !i9 ,; �i;i� � :�. � se
Dralnage Issues: Meihodalogy:
].o l7��s��iment from stilling laasin and�dj�cenrt cat�h ba�in�;"��ctoring'�ammended. 1. Connect the'�actor"truck to an appra�ed nearby saurce of clean water fnr"�actaring"purposes.
� �����.���g���y�����o��������a�,�������������a�������y�;��� 2. Unwind the water jet hose reel and place it dawn the slope of the stilling basin(Lpcatian C}. Use
-If water remains 24-48 hours fnllowing a storm event,cleanaut undardrain(Location G1 and hose ta loasen the accumulated sediment.
cultivate soils,as required: 3. Place the flexible suctian hase inta the stilling basin(Location C7.
■Close valve at end af underdrain pipe,near riser box. 4. Perfarm"vactoring"operations by simultaneously using
■Attach a standard campressor and fitting to first cleanout and run compressed air through pipe. the suction arm and water jet hose to remove slurry
Repeat for all remaining connections until grass turf above underdrain is sufficiently qraken up, until the rip-rap base is reached. ' �^ , ' � � .��
■Remoue wmpressor hose and fitting. Restore rralrre to ariginal setting. 5. Continue slurry removal until capacity of"vactor"truck 1}Refer to site specific SWPPP and
■Till and revegetate disturbed soil. is reae h e d. regulated M54 for reparting
-Note sedimerrt accumulation. Remove sediment manually when sediment is dry ivisible cracks? 6. Stop"vactonng'work. Dispose of slurry aff-site. requirements related ta
and readily separates from basin floor. Till and revegetate remaining sail. 7• Repeat 5teps 1-fi until all the sediment has been maintenance
-Replace plantings ar cultivate soils to ensure adequate filtration,as required. rem0�' 2)Repvrt practice failures ta owner-
� ��������������������������������������������� 8. After"vactoring"work is complete,carefully remove the operatar and relevant regulated
-Remwe and replace all media ta ariginal specificatians or to approved,revised specifications. flexible suctian hose and the water jet hose fram stilling MS4
-Underdrain piping may 6e reused if in good condition. hasin,and transport them back to the truck.
4. Inspect the accessway and adjacent area for damage,
a �. ,g ,,, R, �,3, , D such as dislodged field stone,wood chips,etc.,and a, , ," � '
refi�rbish as required.
The stilling basin or other pretreatment de�ice must be dewatered before proceeding with'wactorin�'
Oper8ti0ns. -Erasian and Sediment Control
Note: Secure locks an gates as necessary .InIet/0utlet Protection
Methodalagy: priar ta exiting site. .Sediment Removal
1. Park the'wactar"truck along the maintenance accessway near the inlet{Lacation A}. The boam -Pretreatment Devices
should be extended in the directian af the stilling basin. -llnderdrains
2, Ensure clear access for a two-person crew down the slope near the stilling basin(Lvcation C). -Landscaping
3. Pump out the water from the stilling basin to the grass channel(Locatinn E)downstream. -MeChBniCal Issues
4. Proceed with"vactoring"aperations. •RiserlBarrel Outlet 5tructure
-Maintenance Arxess
-Cald Climate Cansideratians
Stormwater Maintenance Inspection Checklist
Infiltration Basin (I-2)
Project:
Location:
Site Status:
Date:
Time:
Inspector:
Satisfactory/
Maintenance Item Unsatisfactory Comments
Infiltration Basin #
1) Embankment and emergency spillway (Biannual, After Major Storms):
i) Vegetation and ground cover adequate
ii) Embankment erosion
iii) Unauthorized planting
iv) Cracking, bulging, or sliding of fill/banks
(a) Upstream face
(b) Downstream face
(c) At or beyond toe
1. Downstream
2. Upstream
(d) Emergency spillway
v) Seeps/leaks on downstream face
vi) Slope protection or riprap failure
vii) Spillway clear of obstructions and debris
viii)Other (specify)
2) Pretreatment Area, if applicable (Biannual):
i) Depth of Sediment
ii) Accumulated debris
iii) Side slope erosion
iv) Inlet swale erosion
v) Condition of grass outlet
Satisfactory/
Maintenance Item Unsatisfactory Comments
3) Basin (Monthly, After Major Storms):
i) Accumulated debris
ii) Erosion, rills, etc.
iii) Growth in basin floor
iv) Condition of grass
4) Outlet Control Structure (Biannual):
i) Inlet protection device
ii) Low flow orifice
iii) Excessive sediment accumulation
iv) Concrete/masonry condition of structure
(a) Cracks or displacement
(b) Minor spalling (<1")
(c) Major spalling (rebars exposed)
(d) Joint failures
(e) Water tightness
v) Outlet pipe condition
vi) Underdrain valve functioning
5) Other (As Required):
i) Complaints from residents
ii) Aesthetics
iii) Lawn restoration required
iv) Odor
v) Any public hazards (specify)
vi) Other (specify)
Comments:
Actions to Take:
Stormwater Maintenance Inspection Checklist
Closed Drainage System
Project:
Location:
Site Status:
Date:
Time:
Inspector:
Satisfactory/
Maintenance Item Unsatisfactory Comments
Drainage Structures #
Inlet & Outlet Pipes
Material Type: HDPE
PVC
CMP
1. Drainage Structures Condition (Annual)
a) Ground surface conditions around structure
b) Frame & Grate condition
c) Grade rings/bricks condition
d) Spalling mortar/infiltration
e) Steps condition
f� Cracks or displacement
g) Minor spalling (<1")
h) Major spalling (reinforcement exposed)
i) Joint failures
j) Water tightness
k) Other
2. Sediment Accumulation (Spring & Fall)
3. Pipes obstructed (Annual, As Required)
a) Debris removal necessary
b) Other
Satisfactory/
Maintenance Item Unsatisfactory Comments
4. Outlet/inlet pipe conditions (Annual)
5. Other (As Required)
a) Complaints from residents
b) Aesthetics
c) Lawn restoration required
d) Odor
e) Any public hazards (specify)
f� Other (specify)
Comments:
Actions to Take:
Appendix M
Erosion and Sediment Control Plans
Stormwater Pollution Prevention Plan (SWPPP) M
26 Freedom Way February 2021
GENERAL CONSTRUCTION SEQUENCE
� SITE SOILS DATA TOTAL DISTURBANCE _ ±4.0 ACRES
� �
PRE-CONSTRUCTION �
TOM HUTCHINS, P.E. INFILTRATION PRACTICES: ` 1 j
10/17/2015 INFILTRATION PRACTICES SHALL NOT BE USED AS SEDIMENT TRAPS. 1. OBTAIN PLAN APPROVAL, GRADING PERMIT, ANY EASEMENTS, AND ALL
TEST PIT #1 ALL CONSTRUCTION RUNOFF SHALL BE DIRECTED TO AN APPROPRIATE � OTHER LEGAL CONTRACTS/PERMITS REQUIRED FOR CONSTRUCTION. ��
0 - 120" - MEDIUM BROWN FINE & MEDIUM SAND SEDIMENT CONTROL DEVICE. INFILTRATION BASINS MAY ONLY HAVE 2. FLAG THE WORK LIMITS AND MARK TREES AND AREAS FOR PROTECTION AS
� � ROOTS TO 96" FLOWS DIRECTED TO THEM ONCE THE SITE HAS BEEN STABILIZED BY � REQUIRED.
� �' TEST PIT #2 VEGETATION OR THE INSTALLATION OF SUBBASE. PROVIDE INLET � 3. HOLD PRE-CONSTRUCTION CONFERENCE AT LEAST ONE WEEK PRIOR TO
0 - 60" - MEDIUM BROWN FINE & MEDIUM SAND PROTECTION AS IDENTIFIED. STARTING CONSTRUCTION. CONTRACTOR SHALL NOTIFY THE CITY OF
� � � � � � ALBANY BUILDING DEPARTMENT, DESIGN ENGINEER, INSPECTING ENGINEER,
� Verity Engineering, D.P.C.
� �� N15'04' 30" _ 60 - 120" - GRAY BROWN FINE SAND AND THE SWPPP MONITORING PROFESSIONAL.
_ � � � � � � � - - SLIGHTLY FIRM P.O. Box 474
� � ��� \ �/ /��� ` \\� ` ROOTS TO 90" ` �'' � � 4. INSTALL TEMPORARY GRAVEL CONSTRUCTION ENTRANCE/EXIT, INLET Troy, New York 12181
�v NO SEASONAL HIGH GROUNDWATER EVIDENCE D cn PROTECTION, AND CONCRETE WASHOUT.
� / �-- - - � w /// � � � 518.389.7200 verit en .com
/ emp rory Eosement �,, ) � I y g
i / / \ � 7 To e Granted To �I c � / � � � �1 � 5. STAKE OUT CLEARING LIMITS. AREAS OF DISTURBANCE SHALL NOT EXCEED
/ / � FIVE (5) ACRES AT ANY TIME. OBTAIN APPROVAL FROM CITY OF ALBANY
/ / � - \ \ BUILDING DEPARTMENT TO PROCEED WITH GRADING PERMIT. G�NERq�
/ � - - - - - - - - � - - - - - - - - - - - - _ • - -- -- - -- - = CONSTRUCTION �
/ 186.60= sv�-sv�-474. 4=sv�-svs-sv�-sv�-svs-sv�-sv�-svs-sv� v� � Muni�� ������
� I � - - - - - - - � - - - - - - - ' � _ _ _ _ _ _ _ _ ��� 6. COMPLETE REMOVAL OF EXISTING STRUCTURES, CLEARING AND GRUBBING. � y E N T E R P R 1 S E S, 1 N C.
�� ••c• ^, '^ , �� M M-M M-M M-M M-M M-M M-M M-M M-M M-M M-M M-M M- O�Q'
o,• � � - - - - - - " - - - - - - - - - - - - - - - - - - - - - - -T / tiTRAC'(� 881 Murray Road
7. STRIP AND STOCKPILE TOPSOIL, REMOVE LOOSE SOILS THAT ARE NOT
"��" Middle Grave, NY 12850
SUITABLE FOR THE PROPOSED IMPROVEMENTS. STOCKPILE WITHIN
� ,y'L ,�� -� ,LO � APPROVED AREA WITH ADEQUATE PROTECTION.
� , 60' �de ingress/Egress & Utility Eoseme COntdCt: Mlke Munter
�� �'>j� 'y°� I/�//� To Be Gronted To Lot 24 Fieedom Woy
� � x� FREED OM V V/`i Y Rood To Be Constructed To City Of Sorotogo Springs : 8. PROCEED WITH ROUGH GRADING AND IMPORTING/EXPORTING OF FILL AS 518.000.0000
�p ,��j ��j �' Use And Mointenonce Aareement �ll Be Exe�• REQUIRED.
*���. ���. I � - - - - - - - - - - - - - - - - - - - - - - Between Lot 24 _ - 9. TRENCH FOR UTILITIES.
w
� � ,�.�� � 10. PREPARE BUILDING PADS AND POUR FOUNDATIONS. INSTALL SUBBASE AND �
,Loj I � � -� - � - i � - T - T - � -I - � - T � ,��, / CURBING. in
,Lo�' � � �.. - - _ - "��' z �.
� ,�'L� � - 12. INSTALL INFILTRATION BASINS AND DRYWELLS. o
- M � � � �I� -� �� � � -� � � �� � � - � � - � � - � � �� � � - � � - � � � � � - �
13. INSTALL PAVEMENTS. O w
�� \ - H z
� l - �� � INFILTRATION � � POST-CONSTRUCTION -
� 1\ \ 7
� INSTALL AND I " �\ 1 �' � - - BASIN #2 - - 14. ONCE CONSTRUCTION IS COMPLETED, CONTRACTOR TO PERMANENTLY � L z
� C - -
03 � INSTALL AND TP#1 _ _ _� �t� STABILIZE ALL EXPOSED AREA, INCLUDING AREAS THAT HAVE BECOME BARE 7 O o
MAINTAIN o� DUE TO TRAFFIC. ` c�
\ ,�'y '
� � \ J/ MAINTAIN _ - . � - � -� - � - �,°�' �--�
`I °�' CONSTRUCTION -so3 �� 1 c-soa '� � � o
� ' � ENTRANCE \;! l SILT FENCE � � 15. ENSURE POSITIVE DRAINAGE FLOW AWAY FROM BUILDINGS AND ADJACENT a
y � / PROPERTIES SO THAT FLOWS HAVE A POSITIVE DIRECTION TOWARDS H Q
M�
�` ,yp �S �� �S �S �0� �� STORMWATER COLLECTION DEVICES. � Q Q
I \ ' J ��j�L�- �S �S .�j'L� .��L� �S,�'L� 16. REMOVE ANY ACCUMULATED SEDIMENT AND ENSURE ALL STORMWATER � Q �
I Op ` � MANAGEMENT PRACTICES ARE FUNCTIONING CORRECTLY, AND DISCHARGING � �
��,L. � I CLEAN RUNOFF. Q H
x ' 17. PERFORM FINAL CLEANUP OF DEBRIS, AND REPAIR ANY AREAS THAT WERE � �
I INFILTRATION � l I I I I I I I � ' AFFECTED FROM CONSTRUCTION. Q
3;1 BASIN #1 01 .y�i .�'Y 18. REMOVAL OF OVERALL EROSION CONTROL MEASURES MAY ONLY OCCUR WHEN � �--� o
8" N12 HDPE � � � Q �
� � 153 LF @ 1.18% � ` �jti/ �jti� �jti� THE PROJECT IS SUFFICIENTLY STABILIZED AND REQUIRES THE APPROVAL
� x� x� � OF THE CITY OF ALBANY BUILDING DEPARTMENT AND THE SWPPP INSPECTOR. Q
I I oa RIPRAP OUTLET � I = J `^
3' WIDE soa PROTECTION INV:326.50 v 1 , ` _ }
GRASSED BERM `- v o
' I 322 � � � � ' EROSION & SEDIMENT CONTROL PLAN NOTES: O � H
� � _ u
' I p� m 32 32 325,L�o �� '�y �� h��� � \ ' 1. ALL PROPOSED EROSION CONTROLS SHALL BE INSTALLED PRIOR TO
�„�. 3 �•y� q, ,��y� �� ,�°' O' O' ._+: � �
� �' .�'��3 NDS-1 _ � BEGINNING OF CONSTRUCTION. FINAL LOCATION AND CONSTRUCTION SHALL Q
LIMITS OF � O '�� 9 • • . ; .' . • � • ' ".• s '• ' RIM: 330.80' - BE REVIEWED BY A QUALIFIED PROFESSIONAL. 3
DISTURBANCE `O _�32 •�'. .�.�•.. . =,�. . `• .... .,.• . . . •.: � �
'y .. , � . �� INV OUT: 328.30' (8") o
(±4.0 ACRES) �� r �j'���'�� .., ' �� 2. REMOVE EROSION CONTROLS ONLY UNDER THE AUTHORIZATION OF A o
.,�'L� ; ' ".;1;,�''��,•. . • �';•• . ; •, � �� � ------------------------ �- �
, _ \ QUALIFIED PROFESSIONAL. �
• , . ...,•: •.�. • . 4 ---- --------------------I / LL
I 3:1i ~7% � � 135'� ' DW-2 os 3. CONTRACTOR MUST PROTECT ALL SURFACE WATERS FROM SILTATION DURING �
I .• ., r � ❑ f RIM: 329.75' -so3 CONSTRUCTION WITH APPROPRIATE MEASURES INCLUDING, BUT NOT LIMITED N
� � \ � T0, PLACING STRAW BALES AND SILT FENCING AROUND WORK.
N ?' � .
IFOREBAY \� ' • n�"�ti1� \ EXISTING EAVE \ \ -� / �Z$` ' 4. EROSION AND SEDIMENT CONTROL MEASURES SHOWN ON THIS PLAN ARE THE
O� \ \ :�ti' \ TRENCH (4' X 144') MINIMUM REQUIRED. ADDITIONAL MEASURES MAY BE REQUIRED, BASED ON pF NEw
�j� TP#2 ' �J FIELD CONDITIONS, DURING CONSTRUCTION AS DIRECTED BY A QUALIFIED
'\�O Op` x�y � � � \ 60 �`�1 '>j,'�O '>j,'�� 30� �� PROFESSIONAL. �P�O� JAMFS �O�
'��� '�i�� 5°� \ , ��6 � � \ 5 YORKI STATEDSTANDARDS AND TSPECIFICATIONSHFOR EROSION wAND EDIMENT * Q �� 't
�� 1 � CONTROL, LATEST EDITION. r CC
l� � o � \ ' � '�• : � W
I � � 1 � � 1 ..� . . �
03 RIPRAP OUTLET � '\ , .T/O ,.•• 31- � \ 6. EROSION AND SEDIMENT CONTROL DEVICES SHALL BE INSPECTED � Z
' c-soa PROTECTION INV:322.00 \ \ I I � � ` ' \ REPAIRITHEL E OS�IONF AND EDIM NT F ONTROL NDEVICES AS NNECESSARYHAND Q O 1 \
..••�. �
_ � � �� � \ � \ A S D I R E C T E D B Y A Q U A L I F I E D P R O F E S S I O N A L. A 9 4 3 0 �
�- '\ � I \ � ���s 32 \ \ � 7. ALL TEMPORARY EXPOSED FACES OF EARTH CUTS AND FILLS SHALL BE R�FESS�oNP�
/ �010 `��� � '�� � \ � VEGETATED OR PROTECTED FROM EROSION IMMEDIATELY UPON COMPLETION ir is A VIOLATION oF New rowc STATE EDUCATION �aw ARTICLE ias Foa ANY
� � \ ,�'y' �� �j�'� n OF EARTHWORK OR IF WORK IN THESE AREAS IS TO BE SUSPENDED FOR PERSON, UNLESS THEY ARE ACTING UNDER THE DIRECTION oF A LICENSED
\� r- \ � � \ \ 3,_ ,, . .i � O \ \ FOURTEEN (14) DAYS. PROVISIONS SHALL BE MADE IN ORDER TO MINIMIZE PROFESSIONAL ENGINEER, TO ALTER THIS DOCUMENT IN ANY WAY. IF ALTERED, THE
ALTERING ENGINEER SHALL AFFIX TO THE DOCUMENT THEIR SEAL, THE NOTATION
� � ( . • •• THE AREA TO BE DISTURBED AND TO PREVENT THE CONCENTRATION OF "ALTERED BY"FOLLOWED BY THEIR SIGNATURE, THE DATE OF SUCH ALTERATION, AND
' ��O �� .yO �O I OO \� I. �O �O O �� � ' A SPECIFIC DESCRIPTION OF THE ALTERATION.
O' '•• .� \ \ STORM WATER RUNOFF AND EROSION OF DISTURBED EARTH SLOPES.
�'�� �'�y ��'� �ti� �ti� �\\ j �'L� .,�'L� 195' ,,�,,�'�'� ,,, : • �� .�
.j COPYRIGHT�2021 VERITY ENGINEERING D.P.C. ALL RIGHTS RESERVED.
x j�'� �- - - M. : � . , • Y , , , ,\ , � , . ; � '�j� �.: 'l0- � 8. UPON COMPLETION OF GRADING OPERATIONS THE DISTURBED AREAS SHALL
� • ' ' • ' . .,'.•.,� � ' BE STABILIZED BY THE FOLLOWING METHODS, DEPENDING UPON THE
� ,�------�--------------------J � � '�� �� � �•� � '-' � � �, �� `� \ •.'� ''��' 1 � CLASSIFICATION OF THE AREA AS EITHER TO RECEIVE PERMANENT OR DESIGNED BY: AJV
I � � o � � • I � TEMPORARY SEEDING:
\�� I I � � .' ; o � c \ \ I DRAWN BY: AJV
\ d' � � •;'•�. •., .''.'. . `..: :�': v a � ��� � SEED BED PREPARATION
/ � ��i' �'�'" �'• K' � \�( �, IF AREAS ARE DEEMED AS REQUIRING TOPSOIL THEN APPLY TOPSOIL TO A
Y *�• 7•` • � •' � 'W
I �� 24" N12 HDPE1 �\ + ' :...:•..'+<:::%��...>.-:'•,..;:`.;;.a,: � . \
`,.;�'�,,;; ,,;,;,,,,'. <.. •• UNIFORM MINIMUM DEPTH OF FOUR INCHES (4"). TOPSOIL SHALL BE CHECKED BY: BTS
' � " '� '�` •"','4i"" "r 4 ' \ FRIABLE AND LOAMY, FREE OF DEBRIS, OBJECTIONABLE WEEDS, AND
I 105 LF @ 0.29% � � '• o .;•::;;:`::::..'`.. °'. '� ,'
\� ' :,ac�. ;;,;..;.:*'.•.;-;i:°a' `° • � STONES, AND CONTAIN NO TOXIC MATERIALS. IF TOPSOIL IS DEEMED APPROVED BY: AJV
?.�'o..;.,.. . .. ... �•. •
�+.:~.�.';'��:�' •"'""' "''�,' \ UNNECESSARY THEN PREPARE SEED BED BY SCARIFYING COMPACTED AREAS
� � I a� � o� I tia ��� �o � .:.. °'• ' � \ 1
;. or.;;;��'r-.���:�;''.?o' \ AND REMOVING DEBRIS, ROCKS, AND STUMPS. SEEDBED SHALL RECEIVE THE
..�'L� .�'L� .�'L�O � ,�'L�� +. �' ''''" '�:'.`.`,�; �� \ ) FOLLOWING SOIL AMENDMENTS: SCALE 1�� = 3O�
� x � �, � n �� �� I I
f f / f h~ �•.'-'J ,4 �� I I •. ��O ��� I 8.1. LIME TO A Ph OF 6.0 DATE 02�26�2021
Q� `� :+. `��:'`'^�-� �'L1 �� '• I 8.2. FERTILIZE WITH 600 LBS OF 5-10-10 OR EQUIVALENT PER ACRE (14
I / � � �,`'��`•""�-���°��'� �\\\\ ,�O' I I LBS./1000 SQ. FT) THE SOIL AMENDMENTS SHALL BE WORKED INTO THE
ol� � ' � _ _ �J I I SEED BED WITH A DISC, SPRINGTOOTH HARROW, OR OTHER SUITABLE
It I � N \�_ i t' ' I EQUIPMENT. >
TEMPORARY � CB-1 , � 0 \ t'' I ' � � � � � � � � � � m
SEDIMENT 01 RIM: 325.90' � • / TEMPORARY SEEDINGS a
' SF BASIN -so3 / INV IN: 323.50' (12") � '>j�'� ,:� ' / ANNUAL RYEGRASS SEED SHALL BE APPLIED AT A RATE OF 0.9 LBS PER
� INV OUT: 322.30' (24") \ 'Y� ��O / / 1000 SQUARE FEET. USE WINTER RYE IF SEEDING DURING
m � - \ y � •� ��j0� h0 ,��j0� / / OCTOBER/NOVEMBER.
� I / � 16��'� NDS-3 \ �� '��� / / / PERMANENT SEEDINGS o
N � - 6�,��d� ' RIM: 330.10' ,�'�j� � / SEEDING SHALL CONSIST OF 1 LB PER 1000 SQUARE FEET OF SEED
} (d �i'Qp INV OUT: 328.60' (8") � DW-1 os ' / / / 10%TAP NKGCL VERAOR ALFALFAT THEO EED MIXESHALL REE SP EADABY Z
� STOCKPILE I INSTALL AND MAINT 02 0 1 F � o
AREA T 0� CONCRETE WASHOUT c-soa N 8p.o RIM: 329.75' -soa / UTILIZING A CYCLONE SEEDER, DRILL, OR CULTIPACK SEEDER. SEED
N ' I 'y� / I � �� EXISTING EAVE / � 1 / APPLIED HBYL APPROPRIATE/HYDROSEEDING CMETHODS. ALL� SE DEDL AREAS H O
0 � oa x ''� ��� TRENCH (4' X 80') \ EXISTING EAVE � � O � � / / / SHALL BE MULCHED WITH STRAW MULCH APPLIED AT RATE OF 2 TON/ACRE
cv �,0 1� c-soa �� � � TRENCH (4' X 66') � � Zo� � ~
\ �. �. �. � ( � ` / / / (90 LBS PER 1000 SQUARE FEET) AND ANCHORED WITH "TERRA-TACK" OR m H
\ 1� �� �� � �� 'y1� , �\� ~$° ------------- 1 �� / / EQUIVALENT. � � � � � � � � cn OC
o �0 x� 6° 8" N12 HDPE 8" N12 HDPE NDS-2 �\_/ � / / ROCK a w
'�i \\ �'�� RIM: 330.60' / WHEN ENCOUNTERED, SHALL BE UNDERCUT A MINIMUM OF 12 INCHES BELOW H p
_ � � 28 LF @ 1.97% II 13 LF @ 1.79% INV OUT: 328.08' (8") � �
�' / FINISHED GRADE; BACKFILL OVER THE ROCK SHALL CONSIST OF 8 INCHES �
' I � \ � h _ ______ __ '�j� / / / OF GRANULAR FILL AND 4 INCHES OF TOPSOIL. H
� ' SF � ��9,s \ 'L��� �� -- �'�'--� � I
Q I �j Sx �'�___ _ ____ _ nj� .L�i'� � 9. IF STABILIZATION BY SEEDING CANNOT OCCUR DURING THE RECOMMENDED
_,�O______ _ x_ x''i - ,�O ^ � SEEDING PERIODS, TOPSOIL, FILL, AND EXCAVATED MATERIALS AREAS
� ''�� �� C B-2 ---- ���, - ��0,
�p � / SHALL BE TEMPORARILY STABILIZED WITH ANCHORED MULCH UNTIL SUCH
TIME AS EFFECTIVE SEEDING CAN OCCUR.
� ,,�'L°' ,,�'y� ' 1 RIM: 329.77' INV:327.85 c� � 3�� /
r1 0�0 � INV OUT: 326.50' (12") INV:328.05 oi N 10. STOCKPILE MATERIALS SHALL NOT BE LOCATED WITHIN TWENTY-FIVE FEET
O � N '�j� I (25') OF ANY DITCH, STREAM, OR OTHER SURFACE WATER BODY. �
O ? � N x� \ W
N �O �O �O I �O ,LO-N � ,LO 11. IF CONSTRUCTION IS SUSPENDED, OR SECTIONS COMPLETED, AREAS SHALL � �
� ��• I ��• ��• ��• \ ��y• I I ��y• BE SEEDED AND/OR MULCHED IMMEDIATELY. � � � � � � � � � \ Q
� 3 _ 3 3 3 3 � 3
� �' i' o x" d;° 12. COMPLY WITH THE APPLICABLE STIPULATIONS SET FORTH IN THE STORM 0
� ' o�o o � WATER POLLUTION PREVENTION PLAN (SWPPP) PREPARED FOR THIS
w � d' o�° '� PROJECT. •
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�� - ' \ � - '- -' - - ' � ".�\ GRADING , EROSION AND
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o _ \ � � � -' - � -� � �. _ � \ ������ GRAPHIC SCALE SEDIMENT CONTROL
a � \ 30 0 15 30 60 120
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( IN FEET )
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1 inch = 30 ft.
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