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20180533 385 Broadway Mixed Use 5-24-18 Submittal
14:1 The LA GROUP Landscape Architecture&Engineering P.C_ People.Purpose.Place. 40 Long Alley Saratoga Springs NY 12866 p:518-587-8100 518-587-0180 www.thelagroup.conn Proj ect Narrative TO: Saratoga Springs Planning Office (DATE: 5/24/2018 JOB NO.: 2018050 City Hall 474 Broadway ATTENTION: Ms.Kate Maynard Saratoga Springs,NY 12866 I RE: 385 Broadway The applicant is developing a 5 story mixed use—residential, commercial building. The building will include 72 residential units & 1,200 SF commercial fronting on Broadway. The project will include 47 parking spaces (9 site, 38 garage). 12 mechanized lifts will be used in the garage. If enclosures are not as noted,kindly notify us at once. City of Saratoga Springs Complete Streets Checklist Saratoga Springs Complete Street Policy Vision (May 2012) The City of Saratoga Springs Complete Streets Policy will encourage the development of a complete streets network throughout the City to create a more balanced transportation system. The Policy shall be consistent with and assist in achieving the goals and recommendations set forth in the City's Comprehensive Plan and other policy documents. The Policy shall ensure new and updated public and private projects are planned, designed, maintained and operated to enable safer, comfortable and convenient travel to the greatest extent possible for users of all abilities including pedestrians, bicyclists, motorists and transit riders. This checklist is intended to assist the City in achieving its vision for complete streets. 385 Broadway Apartments 5/24/2018 Project Name: Date.. 385 Broadway, Saratoga Springs Project Location / Limits: . Proposes mixed use residential commercial building Project Description. Instructions: For each box checked, please provide a brief description for how the item is addressed, not addressed, or not applicable and include supporting documentation. Street Classification (identify street or streets within the project area) Principal arterial Ill Minor arterial 111 Mixed use collector Ill Mixed use local 111 Residential collector 111 Residential local 111 Special use street 111 EXISTING CONDITIONS Item to Be Addressed/ Checklist Consideration YES NO N/A Required Description Existing Bicycle & Pedestrian Operations Do bicycle and pedestrian accommodations exist? (see page 2 for El El L:1 Existing sidewalk along Broadway examples) Existing Transit Operations Do transit facilities exist within the study area, including bus and EZILI ❑ train stops/stations? Is the project area on a transit route? (CDTA Service Routes) EZIfl 0 Routes,450,451,452 Are there bicycle racks, shelters, or parking for transit riders ElLI LI Bicycle racks exist on Broadway y available? Existing Access and Mobility Do connective opportunities exist with schools, hospitals, senior ElLI LI care or community centers or persons with disabilities within project area? Are there gaps inhibiting continuous access between schools, ❑ ElE hospitals, senior care, or community centers or persons with sidewalks are continuous on Broadway disabilities within project area?" Project Area Context Are there prominent landmarks, recreation, shopping, employment ❑✓ r:i LI center, cultural centers or other key destinations that offer Project is proposed in the downtown business district opportunities to connect this site? Please list and/or describe planning or policy documents addressing bicyclist, pedestrian, transit, or truck/freight use for the project area. Examples can include: City of Saratoga Springs Comprehensive Plan, City of Saratoga Springs Open Space Plan, Capital District Transportation Committee Bicycle/ Pedestrian Priority Network, City Standard Details, etc. City of Saratoga Springs Comprehensive Plan: Downtown Special Development Area. Capital District Transportation Committee Bicycle/Pedestrian Priority Network. City Standard Details: City of Saratoga Springs Complete Streets Checklist 1 PROPOSED DESIGN Item to Be Addressed/ Checklist Consideration YES NO N/A Required Description Complete Streets Design Bicyclist accommodations? El1:1 U Bike racks exist on Broadway Pedestrian accommodations? El E E Existing sidewalks Access and Mobility accommodations? ElEl EI Curb ramps at sidewalks Transit accommodations? M LI p Bus stops at Division Street intersection and across Broadway Truck/freight accommodations? ❑✓ ❑ ❑ Deliveries in back of building Streetscape elements? El 0 ❑ Sidewalks,benches,street trees.lighting Bike Facilities: Off-roadway bike E Yes MNo ENA accommodations Pedestrian Facilities: Dedicated bike lane YesENo NA Sidewalks on both sides of ElYes ENo LINA Shared-use lane =Yes ❑No NA the street Striped crosswalks I=1 Yes ENo ENA Shoulder ❑Yes ElNo UNA Acceptable actuated traffici:iYes NoENA Geometric modifications El Yes EINo ENA Acce p ❑ to reduce crossing signal bike detection, including turn lanes distances such as curb signals allow adequate YesLINo❑NA extensions (e.g. bulb-outs) Do q ❑ Acceptable provision for 0YesflNoUNA minimum time for p greenpedestrian traffic signal bicyclist to safely cross features (e. . ped. buttons) intersection? g Pedestrian signage for or ❑Yes UNo ENA Signage and pavementEYes EINo NA crossing &wayfinding markings specific to proposed bike facilities Safety islands/medians on ❑ Yes DNo ENA Bicycle safe inlet grates ElYes❑NoflNAroadways with two or more y traffic lanes in each direction Bicycle parking, eg. bike racks, El Yes UNo ENA Enhanced supplemental YesENo NA bike lockerspp �❑ ❑ Transit Facilities: pedestrian treatments at uncontrolled marked Transit shelters 0 YesIZINoENA crossings Bus turnouts E Yes MNo❑NA g Connectivity: Standing pads ElYes UNo ENA Are therero osed ElYes ❑No❑NA Has CDTA been contacted? LI Yes lilNo LINAp p connections to other bike Access and Mobility Facilities: paths, pedestrian facilities, or Adequate sidewalk or paved E Yes No EINA transit facilities? path Are there proposed D Yes ENo LINA Acceptable D Yes No INA connections to any key consideration/provision for destinations listed on page 1? accessible pedestrian traffic Are there proposed E Yes No ENA signal features connections to Curb ramps, including D Yes No [INA neighborhoods? detectable warning Streetscape Elements: surface Are streetscape elements ❑✓ Yes No ❑NA Acceptable slope and IZIYes ENo LINA proposed such as cross-slope for driveway ramps, landscaping, street trees, sidewalks, crossings) planters, buffer strips, etc? Have conflicts been reduced UI Yes Ei No E NA Pedestrian-level lighting ❑✓ Yes No ENA among pedestrian, bicyclists, g g and motor vehicles (access Public seating or benches ElYes No UNA management)? Design Standards and Guidelines Design meets guidelines such as described below for ElYes LINo ❑NA Describe bicycle/pedestrian/bus/transit facilities? *American Association of State Highway and Transportation Officials(AASHTO)-A Policy on Geometric Design of Highway and Streets, Guide for the Development of Bicycle Facilities and AASHTO Guide for the Planning,Design, and Operation of Pedestrian Facilities;Public Right-of-Way Accessibility Guide(PROWAG);Manual on Uniform Traffic Control Devices(MUTCD);Americans with Disabilities Act Accessibility Guidelines(ADAAG); National Association of City Transportation Officials(NACTO)-Urban Bikeway Design Guide. New York State Department of Transportation— Highway Design Manual City of Saratoga Springs Complete Streets Checklist 2 Cost Estimate for Letter of Credit PB# 18.xxx Project No: 2018050 Project: 385 Broadway Apartments Location: 385 Broadway Saratoga Springs, New York Date: 5/24/2018 ON-SITE WORK Item Quantity Unit Unit Cost Subtotal Site Preparation and Grading Erosion Control (including silt fence&construction access) 1 LS $2,000.00 $2,000.00 Hardscape Asphalt Pavement 2,600 SF $3.00 $7,800.00 Pavement Striping 1 LS $1,000.00 $1,000.00 Cast in Place Concrete Curb 15 LF $18.00 $270.00 Site Amenities Topsoil and Seed 1 LS $500.00 $500.00 Split Rail Fence 116 LF $20.00 $2,320.00 On-Site Total $13,890.00 On-Site Total X.25 $3,472.50 OFF-SITE WORK Utilities 6"PVC Sanitary line 41 LF $20.00 $820.00 Catch Basin 1 EA $2,000.00 $2,000.00 12" HDPE 58 LF $20.00 $1,160.00 6"DIP Waterline 50 LF $42.00 $2,100.00 Sanitary Connection 1 LS $1,500.00 $1,500.00 16"Water Main Connection 1 EA $2,250.00 $2,250.00 16"x6"Tee/Valve 1 EA $2,800.00 $2,800.00 Hardscape Concrete Sidewalk 1450 SF $5.00 $7,250.00 Granite Curb 105 LF $25.00 $2,625.00 Asphalt Pavement 1,350 SF $3.00 $4,050.00 Amenities Topsoil and Seed 1 LS $1,000.00 $1,000.00 Deciduous Trees 1 EA $700.00 $700.00 Bench 2 EA $400.00 $800.00 Kiosk 1 EA $6,000.00 $6,000.00 As Built Drawings 1 LS $200.00 $200.00 Off-Site Total $35,255.00 Total Site Work $49,145.00 Letter of Credit Amounts Total off-site work $35,255.00 Total on-site work x.25 $3,472.50 Total $38,727.50 L.O.C.amount $39,000.00 W co W z w OW z =O T ¢ _ ❑w Q O ~F rr z U m mwH . 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'2_7 M tX° • i- —11' i 4,-..3'-'2-t lialiFi: la:„ !t:----.1.,-, •— v) a) ---.-,-- - 0 1,'+' _ ._.•7 ' *--V---4- . _L--.•....--..• .-,.=;:t-i—-- -1 . i-.1 IL 1 ' .......L.-- ------ .... um ,il 'NE .0, .. - N igig I - w 0 zc i 0 g Er 'I . .-K -.--r., • ' Z Z -. .,_-- • ---, 1.--..4 --rt., • --,--:,----i 1 tn UJ 1-, CL:, •,,' GI D',,,,,,:_ 1_,J ,4 -,0°',, 0 VA i <i H' CD T— w 0 z00 U a O M N Lo W J W F— O z =_- z f I a z z 0 a ' `3.' ii ---„ O — Lr) I � " I� a W W t - - o z t— t Z Z o uj o ' W Z CLC U S > Oa a a m J CU J The LA GROUP Landscape Architecture cit Engineering P.C. 40 Long Alley P: 518-587-8100 Saratoga Springs 518 -58'? -0180 NY 12866 wvvmthelagN.oLip.00171 Stormwater Pollution Prevention Plan for: 385 Broadway Mix -Use Building Owner/Operator(s): 385 Bway Saratoga, LLC 1732 Western Avenue Albany, NY 12203 Contact: Peter Rosecrans 518-584-9007 SWPPP Contact(s): The LA Group, PC 40 Long Alley Saratoga Springs, NY 12866 1-518-587-8100 1-518-587-0180 SWPPP Preparation Date: May 24, 2018 Table of Contents 1.0 PERMIT OVERVIEW AND REQUIREMENTS.....................................................................1 1.1 PERMIT OVERVIEW...................................................................................................................... 1 2.0 SWPPP REVIEW, UPDATE.......................................................................................................1 2.1 SWPPP REVIEW.......................................................................................................................... 1 2.2 SWPPP UPDATE.......................................................................................................................... 1 3.0 SITE ASSESSMENT, EVALUATION AND PLANNING....................................................... 2 3.1 PROJECT LOCATION..................................................................................................................... 2 3.2 PRE -DEVELOPMENT CONDITIONS................................................................................................ 2 3.3 PROJECT SCOPE............................................................................................................................ 2 3.4 RECEIVING WATERS.................................................................................................................... 2 3.5 HISTORIC PRESERVATION DETERMINATION/ENVIRONMENTAL IMPACT ....................................... 2 3.6 SOILS........................................................................................................................................... 2 4.0 EROSION AND SEDIMENT CONTROL................................................................................. 3 4.1 EROSION AND SEDIMENT CONTROL PRACTICES........................................................................... 3 4.2 EROSION AND SEDIMENT CONTROL DRAWINGS........................................................................... 3 4.3 CONSTRUCTION SEQUENCE OF OPERATIONS................................................................................ 3 4.4 EROSION AND SEDIMENT CONTROL PRACTICE MAINTENANCE.................................................... 4 4.5 EROSION AND SEDIMENT CONTROL INSPECTION.......................................................................... S 4.6 CONTRACTOR SEQUENCE FORM.................................................................................................. C 5.0 POST CONSTRUCTION STORMWATER MANAGEMENT PRACTICES ...................... 6 5.1 STORMWATER MANAGEMENT CONTROLS................................................................................... E 5.2 POST CONSTRUCTION STORMWATER MANAGEMENT DRAWINGS ................................................ 6 5.3 HYDRAULIC AND HYDROLOGIC ANALYSIS.................................................................................. 6 5.4 COMPARISON OF PRE AND POST CONSTRUCTION STORMWATER RUNOFF .................................... E 5.5 WATER QUALITY VOLUME.......................................................................................................... % 5.6 RUNOFF REDUCTION VOLUME..................................................................................................... S S.% CHANNEL PROTECTION VOLUME (CPV) ...................................................................................... S 6.0 POST CONSTRUCTION STORMWATER MAINTENANCE .............................................. 8 6.1 MECHANISM OF OPERATION AND MAINTENANCE........................................................................ S 6.2 MAINTENANCE TO BE PERFORMED.............................................................................................. S 7.0 CONSTRUCTION WASTE........................................................................................................ 9 8.0 TEMPORARY STABILIZATION FOR FROZEN CONDITIONS ....................................... 9 9.0 SPILL PREVENTION PRACTICES.......................................................................................10 10.0 CERTIFICATIONS....................................................................................................................14 11.0 DEFINITIONS............................................................................................................................19 Appendices A HydroCAD Calculations and Storm Data B Soil Survey and Map Set — Location Map, Site Preparation and Demolition, Grading and Utility Plan C SWPPP Inspection Forms —SWPPP Inspection Report D Other SWPPP Forms — Construction Sequence, SWPPP Plan Changes, Spill Response Form, Stormwater Management Practice Maintenance Log E Historic Preservation/Endangered Species Documentation Stormwater Pollution Prevention Plan 385 Broadway Mixed -Use Building The LA Group Project Number -2018050 1.0 PERMIT OVERVIEW AND REQUIREMENTS 1.1 Permit Overview This Stormwater Pollution Prevention Plan (SWPPP) is prepared to inform the landowner and construction personnel of the measures to be implemented for controlling runoff and pollutants from the site during and after construction activities. The operator is responsible to maintain onsite in a secure location that is accessible during normal working hours to an individual performing a compliance inspection, the following information: ✓ the SWPPP, ✓ All inspection reports. All post -construction stormwater management facilities must be inspected annually by a qualified professional, a report prepared and submitted to the City Engineer documenting the inspections as well as the maintenance activities that were completed during the prior year. Technical standards are detailed in the "New York State Standards and Specifications for Sediment and Erosion and Sediment Control (November 2016) as well as illustrated on the Grading and Utility Plan included in Appendix B. 2.0 SWPPP REVIEW, UPDATE 2.1 SWPPP Review City of Saratoga Springs requires preparation of a SWPPP for non-residential activities disturbing 0.1 acres or more. The project is proposed to disturb 0.73 acres. Project review will be conducted by the City of Saratoga Springs. 2.2 SWPPP Update The permittee identified in this SWPPP shall amend the SWPPP under the following conditions: ✓ Whenever the current provisions prove to be ineffective in minimizing pollutants in stormwater discharge from the site ✓ Whenever there is a change in design, construction or operation that could have an effect on the discharge of pollutants ✓ To address issues or deficiencies identified during an inspection by the qualified inspector, the Department or other regulatory authority ✓ To identify a new subcontractor or owner that will implement any part of the SWPPP. The LA GROUP Landscape Architecture @ Engineering P.C. Page 1 Stormwater Pollution Prevention Plan 385 Broadway Mixed -Use Building The LA Group Project Number -2018050 If modifications are required to the post-stormwater management practices the City of Saratoga Springs must be notified in writing of any planned amendments or modifications to the post -construction stormwater management practice component of the SWPPP. 3.0 SITE ASSESSMENT, EVALUATION AND PLANNING 3.1 Project Location The project is located at 385 Broadway, in the City of Saratoga Springs, Saratoga County, NY 12866. See Appendix B for a general site location map. 3.2 Pre -Development Conditions The project site is located to the north of the existing Druthers Building. The site is currently comprised of buildings, paved parking area and some grass area. Stormwater runoff from the existing building is collected into a closed drainage off site that discharges to the City drainage complex. 3.3 Project Scope The project includes the construction of a five -story mixed use building. The building will include approximately 12,000 square feet of commercial space and 73 apartments units. The Project will disturb approximately +/-0.73 acres. 3.4 Receiving Waters The site discharges to the City of Saratoga Springs municipal storm sewer network. 3.5 Historic Preservation Determination/Endangered Species The project area is within an area that is shown on the OPRHP website that might possibly contain archeologically sensitive resources; however, the entire site has been previously disturbed and therefore no sensitive resources should be encountered. The Project site is outside of areas noted on the NYSDEC Environmental Resource Mapper that may contain threatened or endangered species, or a critical habitats. A copy of the environmental resource mapper can be found in Appendix E. 3.6 Soils The LA GROUP Landscape Architecture @ Engineering P.C. Page 2 Stormwater Pollution Prevention Plan 385 Broadway Mixed -Use Building The LA Group Project Number -2018050 The USDA/NRCS soil survey map for this site shows Windsor loamy sand series mapped in the project vicinity. These soils are classified in the hydrologic soil group `A'. Soil report can be found in Appendix B. 4.0 EROSION AND SEDIMENT CONTROL 4.1 Erosion and Sediment Control Practices Temporary Structural Practices ✓ Silt Fence ✓ Inlet Protection ✓ Dust Control ✓ Construction Entrance Permanent Structural Controls ✓ Asphalt pave ment/concrete walks Temporary Stabilization Practices (including vegetative practices) ✓ Seed and mulch bare soil areas within 14 days of disturbance unless construction will resume in that area within 21 days. Permanent Stabilization Practices (including vegetative practices) ✓ Seed and mulch all disturbed areas. Slopes that are 3:1 or steeper should receive a Rolled Erosion Control Product (RECP), sodding, and or hydro - seeding ahomogenous mixture of wood fiber mulch with tackifying agent. Refer to Construction Drawings attached in Appendix B for detailed information on each practice. 4.2 Erosion and Sediment Control Drawings Erosion and Sediment Control practices are shown on the Construction Drawings included in Appendix B. 4.3 Construction Sequence of Operations ✓ Temporary structural erosion controls will be installed prior to earthwork as per the attached plans. ✓ Areas to be undisturbed for more than 14 days will be temporarily stabilized by seeding. ✓ Disturbed areas will be reseeded and mulched immediately after final contours are re-established and no more than 14 days after the completion of construction at that site. ✓ Temporary erosion control devices will not be removed until the area served is stabilized by the growth of vegetation and the area is certified as being stabilized by the Erosion Control Inspector. The LA GROUP Landscape Architecture @ Engineering P.C. Page 3 Stormwater Pollution Prevention Plan 385 Broadway Mixed -Use Building The LA Group Project Number -2018050 Construction Activities Start 4 Stop Sequence must include major items such as, but not limited to, clearing and grubbing, excavation and grading, utility and infrastructure installation and any other activity resulting in soil disturbance. Include installation of erosion and sediment control practices and timing of installation. Install silt fence, construction fence and inlet protection prior to any site disturbance. Maintain erosion control measures Week 1 for duration of site disturbances. Building demolition, site excavation and install underground Weeks 1-3 utilities. Building construction Week 3 - completion Fine grade and landscape After completion of building Remove erosion and sediment control measures upon At completion stabilization of contributing areas. 80% Germination 4.4 Erosion and Sediment Control Practice Maintenance Temporary erosion and sediment control practices will need to be maintained frequently during construction. It is the responsibility of the operator to inspect, and maintain the temporary controls so that they are working efficiently. The operator needs to pay close attention to SWPPP Inspection Reports that will advise of needed maintenance. Captured sediment will have to be removed periodically from each practice in order for the control to function properly. Temporary erosion and sediment control practice maintenance needs are listed below: ✓ Silt fence — maintenance shall be performed as needed and material removed when "bulges" develop in the silt fence. ✓ Storm drain inlet protection — inspect after each storm event. Remove sediment when 50 percent of the storage volume is achieved. ✓ Stabilized construction entrance — entrance shall be maintained in a condition which shall prevent tracking. This may require periodic top dressing with additional aggregate. All sediment tracked onto or spilled on public rights of way shall be removed immediately. When necessary, wheels must be cleaned to remove sediment prior to entrance on public rights of way. When washing is required, it shall be done in an area stabilized with aggregate. The LA GROUP Landscape Architecture @ Engineering P.C. Page 4 Stormwater Pollution Prevention Plan 385 Broadway Mixed -Use Building The LA Group Project Number -2018050 4.5 Erosion and Sediment Control Inspection A qualified inspector shall conduct an assessment of the site prior to the commencement of construction and certify in an inspection report that the appropriate erosion and sediment controls described in the SWPPP have been adequately installed to ensure overall preparedness of the site for commencement of construction. This qualified inspector must be a Licensed Professional Engineer, Certified Professional in Erosion and Sediment Control (CPESC), Registered Landscape Architect, 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 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 qualified inspector shall receive 4 hours of training every 3 years. The day-to-day erosion control activities on the site will be monitored by the construction manager. The qualified inspector and his crews will make at least one inspection every seven (7) days of erosion control devices, and non -stabilized areas during construction. A maintenance inspection report will be completed by the qualified inspector after each inspection. The report form to be completed by the inspector is attached in Appendix C. Reports should be compiled and maintained on-site in the SWPPP 3 -ring binder. All measures will be maintained in good working order; if repair is necessary, it will be initiated within 24 hours of report. The qualified inspector shall take photographs of any needed repairs and also photograph when the repairs are completed. These photographs will be time and date stamped and attached to the weekly inspection report. Seeded and planted areas will be inspected for bare spots, washouts, and healthy growth. If necessary, spot reseeding or sodding will be implemented. A trained contractor will be an employee from the contracting company responsible for the implementation of the SWPPP. This person will be onsite when any soil disturbing activities are being conducted. The trained contractor must have received 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 qualified inspector shall receive 4 hours of training every 3 years. This trained contractor cannot conduct the regular SWPPP compliance inspections unless they meet the qualified inspector qualifications. The LA GROUP Landscape Architecture @ Engineering P.C. Page 5 Stormwater Pollution Prevention Plan 4.6 Contractor Sequence Form 385 Broadway Mixed -Use Building The LA Group Project Number -2018050 The operator shall prepare a summary of construction status using the Construction Sequence Form (included in Appendix D) once every month. Significant deviations to the sequence and reasons for those deviations (i.e. weather, subcontractor availability, etc.), shall be noted by the contractor. The schedule shall be used to record the dates for initiation of construction, implementation of erosion control measures, stabilization, etc. A copy of this table will be maintained at the construction site and updated. 5.0 POST CONSTRUCTION STORMWATER MANAGEMENT PRACTICES 5.1 Stormwater Management Controls The project is proposing the use of a green roof as a volume reduction technique and to capture and treat roof runoff prior to discharge off-site. Stormwater runoff from the roof will discharge to a new catch basin installed along Broadway. In addition, the existing stormwater infrastructure along Broadway will be upsized from an 8" line to a 12" storm line to provide adequate flow capacity once offsite. 5.2 Post Construction Stormwater Management Drawings Post construction stormwater management controls are shown on the Construction Drawings included in Appendix B. 5.3 Hydraulic and Hydrologic Analysis The program utilized for quantifying stormwater runoff rates and volumes was HydroCAD software, produced by Applied Microcomputer Systems of Chocorua, NH. The SCS 24-hour Type II design storms for 1, 10, and 100 -year frequency rainfall were analyzed (Appendix A). ✓ Hydrologic/hydraulic analysis for all structural components of the stormwater control system for the applicable design storms. ✓ Comparison of post -development stormwater runoff conditions with pre - development conditions. ✓ Dimensions, material specifications and installation details for each post - construction stormwater control practice. 5.4 Comparison of Pre and Post Construction Stormwater Runoff The LA GROUP Landscape Architecture @ Engineering P.C. Page 6 Stormwater Pollution Prevention Plan 385 Broadway Mixed -Use Building The LA Group Project Number -2018050 Stormwater Quantity. These calculations are based on the HydroCAD analysis. The design storms used for the pre -development versus post -development comparison were the 1, 10, and 100 -year, 24-hour duration, SCS Type II events. The rainfall amounts for these storms are 2.15, 3.75, and 6.20 inches, respectively. Under pre -development conditions the majority of the site drains to either the East or West. Roof runoff is captured and drains to the Broadway closed storm sewer system. The storm system in Broadway flows south via an 8" line to a catch basin in from of the Adelphi (AP -1). Runoff from the parking areas at the west edge of the site enters a closed storm sewer system to the west of the building which runs south to Washington Street. The Washington Street drainage system flows east to the corner at Broadway and then north to a storm manhole at the intersection of Broadway and Phila Street. Both storm sewer systems meet at Phila Street and flow east to twin 7' x 9' box culverts that run through the city. Post -development stormwater roof runoff will be discharged to a new 12" storm pipe at Broadway that will connect into an existing catch basin to the south of the project area. Runoff from the area west of the building will continue to enter the closed storm sewer system that runs south to Washington Street. Both systems connect at the intersection of Phila Street and Broadway which is the analysis point for the project (AP -1). The project proposes no increase in flow to the twin 7'x 9' box culverts. 5.5 Water Quality Volume The following formula was utilized to determine water quality volume: WQv= (P) (Rv)(A) 12 Where: WQv= Water Quality Volume (acre/feet) The LA GROUP Landscape Architecture @ Engineering P.C. Page 7 Table 4-1 Existing Conditions Versus Proposed Conditions Peak Discharge Rates Analysis AP -1 Point Existing Proposed Design Storm (Cfs) (Cfs) 10 -Year 3.73 3.05 100 -Year 6.48 5.43 5.5 Water Quality Volume The following formula was utilized to determine water quality volume: WQv= (P) (Rv)(A) 12 Where: WQv= Water Quality Volume (acre/feet) The LA GROUP Landscape Architecture @ Engineering P.C. Page 7 Stormwater Pollution Prevention Plan 385 Broadway Mixed -Use Building The LA Group Project Number -2018050 P = 90% Rainfall Event Rv = 0.05 + 0.009(1) where I is impervious cover in percent A = Subcatchment area in acres Water quality volume at the site will be managed though the use of a green roof. The use of a green roof meets the standard practice requirements of the New York State Stormwater Design Manual. Table 5-1 Water Quality Volume (WQv) Summar SMPProvided Type (ac -ft) SMP -1 Green Roof 0.018 Total 0.018 A total of 3,160 SF of Green Roof (SMP -1) provides WQv through volume reduction. The required WQv for the project site is 0.018 ac -ft which equals the WQv provided (0.018 ac -ft). 5.6 Runoff Reduction Volume The total Runoff Reduction for this project is 0.018 ac -ft provided by the green roof. This is greater than the required Runoff Reduction which is 0.002 ac -ft 5.7 Channel Protection Volume (CPv) The project fully reduces the CPv through the use of green infrastructure. 6.0 POST CONSTRUCTION STORMWATER MAINTENANCE 6.1 Mechanism of Operation and Maintenance 385 Bway Saratoga, LLC will be responsible for the long-term operation and maintenance of the stormwater management practices for the life of the site. 6.2 Maintenance to be Performed Post -construction maintenance for this project will consist of regular inspections of permanent stormwater management facilities. These maintenance procedures are essential to assure continual performance of the stormwater management practices on your site. During the inspection and any maintenance activity to the stormwater management practices, the responsible party should fill out an inspection and maintenance log (Appendix C) to record that it was done. The City of Saratoga Springs shall approve a formal maintenance and inspection agreement in accordance with City Code Chapter 242 for stormwater management The LA GROUP Landscape Architecture @ Engineering P.C. Page 8 Stormwater Pollution Prevention Plan 385 Broadway Mixed -Use Building The LA Group Project Number -2018050 ■ Any areas that cannot be seeded to turf by October 1 St or earlier will receive a temporary seeding. The temporary seeding will consist of winter rye seeded at the rate of 120 pounds per acre (2.5 pounds per 1,000 square feet) or stabilized as per the temporary stabilization for winter construction/frozen conditions. ■ Any area of disturbance that will remain inactive for a period of 14 consecutive days MUST be mulched. This includes any previously disturbed areas that are covered with snow. ■ Mulch MUST consist of loose straw applied at the rate of 2 to 3 bales (90 to 100 pounds) per thousand square feet. ■ Mulch MUST be applied uniformly over the area of bare soil or bare soil that is covered with snow. For the latter condition, mulch MUST be applied on top of snow. ■ Using a tracked vehicle, mulch MUST be crimped into the bare soil/snow. The tracked vehicle MUST be driven across the mulched areas in at least two directions to maximize crimping of mulch into the soil/snow. ■ If mulch gets blown off an area to a significant degree, the site inspector WILL require that an area be re -mulched in accordance with Items 2 through 5 above, and this area WILL be included on the inspection checklist for the next inspection. ■ If a particular area repeatedly experiences loss of mulch due to wind, then the inspector WILL require that an alternative method be used to secure the mulch in place. Such alternatives may include the use of netting, tackifier or other methods deemed appropriate by the inspector. ■ During periods when snow is melting and/or surface soils are thawing during daytime hours, mulched areas MUST be re -tracked (crimped) as per Item 5 above at least once every seven days, more frequently if directed by the inspector. Additional mulch may be required to obtain complete coverage of an area. Biodegradable erosion control matting may be required on steeper slopes. ■ Additional stabilization measures for non -frozen ground conditions described in this SWPPP WILL be implemented at the time deemed appropriate by the inspector. During the winter season, if a site has been stabilized and soil disturbing activities have been suspended for the winter, weekly inspections can be suspended. However, monthly inspections must still be conducted. All normal weekly inspections must resume when soil disturbing activities resume. 9.0 SPILL PREVENTION PRACTICES Good Housekeeping and Material Management Practices The LA GROUP Landscape Architecture @ Engineering P.C. Page 10 Stormwater Pollution Prevention Plan 385 Broadway Mixed -Use Building The LA Group Project Number -2018050 The following good housekeeping and material management practices will be followed on site during the construction project to reduce the risk of spills or other accidental exposure of materials and substances to stormwater runoff. ■ Materials will be brought on site in the minimum quantities required. ■ All materials stored on site will be stored in a neat, orderly manner in their appropriate containers, and if possible, under a roof or other enclosure. ■ Products will be kept in their original containers with the original manufacturer's label. ■ Substances will not be mixed with one another unless recommended by the manufacturer. ■ Whenever possible, all of a product will be used up before disposal. ■ Manufacturer's recommendations for proper use and disposal will be followed. ■ The construction manager or his designee will inspect regularly to ensure proper use and disposal of materials on site. ■ The contractor shall prohibit washing of tools, equipment, and machinery in or within 100 feet of any watercourse or wetland. ■ All above grade storage tanks are to be protected from vehicle damage by temporary barriers. Inventory for Pollution Prevention Plan The materials and substances listed below are expected to be on-site during construction. Petroleum for fueling vehicles will be stored in above ground storage tanks. Tanks will either be steel with an enclosure capable of holding 110% of the storage tank volume or of a Con -Store, concrete encased type typically employed by NYSDOT. Hydraulic oil and other oils will be stored in their original containers. Concrete and asphalt will be stored in the original delivery trucks. Fertilizer may be stored on site in its original container for a short period of time prior to seeding. Original containers will be safely piled on pallets or similar devices to protect from moisture. Paints and other similar materials will be stored in their original containers and all empty containers will be disposed of in accordance with label directions. Portable sanitary facilities, which contain chemical disinfectants (deodorants) will be located on-site, with the disinfectants held in the tank of the toilet. Hazardous Products These practices are used to reduce the risks associated with hazardous materials. The LA GROUP Landscape Architecture @ Engineering P.C. Page 11 Stormwater Pollution Prevention Plan 385 Broadway Mixed -Use Building The LA Group Project Number -2018050 Products will be kept in original containers unless they are not re- sealable. Original labels and material safety data sheets will be retained; they contain important product information. If surplus product must be disposed of, manufacturers' or local and State recommended methods for proper disposal will be followed. Spill Prevention The following product specific practices will be followed on site. Petroleum Products: ■ Construction personnel should be made aware that emergency telephone numbers are located in this SWPPP. ■ The contractor shall immediately contact NYSDEC in the event of a spill, and shall take all appropriate steps to contain the spill, including construction of a dike around the spill and placing absorbent material over this spill. ■ The contractor shall instruct personnel that spillage of fuels, oils, and similar chemicals must be avoided and will have arranged with a qualified spill remediation company to serve the site. ■ Fuels, oils, and chemicals will be stored in appropriate and tightly capped containers. Containers shall not be disposed of on the project site. ■ Fuels, oils, chemicals, material, equipment, and sanitary facilities will be stored/located away from trees and at least 100 feet from streams, wells, wet areas, and other environmentally sensitive sites. ■ Dispose of chemical containers and surplus chemicals off the project site in accordance with label directions. ■ Use tight connections and hoses with appropriate nozzles in all operations involving fuels, lubricating materials or chemicals. ■ Use funnels when pouring fuels, lubricating materials or chemicals. ■ Refueling and cleaning of construction equipment will take place in parking areas to provide rapid response to emergency situations. ■ All on-site vehicles will be monitored for leaks and receive regular preventative maintenance to reduce the chance of leakage. Any vehicle leaking fuel or hydraulic fuel will be immediately scheduled for repairs and use will be discontinued until repairs are made. Fertilizers: Fertilizer will be stored in its original containers on pallets with water resistant coverings. Proper delivery scheduling will minimize storage time. Any damaged containers will be repaired immediately upon discovery and any released fertilizer recovered to the fullest extent practicable. The LA GROUP Landscape Architecture @ Engineering P.C. Page 12 Stormwater Pollution Prevention Plan 385 Broadway Mixed -Use Building The LA Group Project Number -2018050 Paints: ■ All containers will be tightly sealed and stored when not required for use. ■ Excess paint will not be discharged to the storm water system or wastewater system, but will be properly disposed of according to manufacturers' instructions or State and local regulations. Concrete Trucks: Concrete trucks will be allowed to wash out or discharge surplus concrete or drum wash water only at designated locations on site. Asphalt Trucks: ■ Asphalt trucks shall not discharge surplus asphalt on the site. Spill Control Practices In addition to the good housekeeping and material management practices discussed in the previous sections of this plan, the following practices will be followed for spill prevention and cleanup. The construction manager or site superintendent responsible for the day-to-day site operations will be the spill prevention and cleanup coordinator. He will designate at least three other site personnel who will receive spill prevention and cleanup training. These individuals will each become responsible for a particular phase of prevention and cleanup. The names of responsible spill personnel will be posted in the material storage area and in the onsite construction office or trailer. ■ Manufacturers' recommended methods for spill cleanup will be clearly posted and site personnel will be made aware of the procedures and the location of the information and cleanup supplies. Any spill in excess or suspected to be in excess of two gallons will be reported to the NYSDEC Regional Spill Response Unit. Notification to the NYSDEC (1-800-457-7362) must be completed within two hours of the discovery of the spill. ■ Materials and equipment necessary for spill cleanup will be kept in the material storage area onsite. Equipment and materials will include but not be limited to absorbent pads, brooms, dust pans, mops, rags, gloves, goggles, activated clay, sand, sawdust, and plastic and metal trash containers specifically for this purpose. ■ All spills will be cleaned up immediately after discovery. ■ The spill area will be kept well ventilated and personnel will wear appropriate protective clothing to prevent injury from contact with spilled substance. ■ Spills of toxic or hazardous material will be reported to the appropriate State or local government agency, regardless of the size The LA GROUP Landscape Architecture @ Engineering P.C. Page 13 Stormwater Pollution Prevention Plan 10.0 CERTIFICATIONS 385 Broadway Mixed -Use Building The LA Group Project Number -2018050 Preparer Certification of Compliance with Federal, State, and Local Regulations This Stormwater Pollution Prevention Plan was prepared in accordance with the City of Saratoga Springs regulations. Name: Signature: Brett Strom Company Name: The LA Group, PC Owner Pollution Prevention Plan Certification Title: Professional Engineer Date: 1 certify under penalty of law that this document and all attachments were prepared under my direction or supervision to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who are directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. 1 am aware that false statements made herein are punishable as a Class A misdemeanor pursuant to Section 210.45 of the Penal Law. 1 understand that SWPPP requires site inspections be conducted by a qualified professional once every seven (7) days. These inspections shall be performed by a qualified professional as defined in the SWPPP. The Owner/Operator will be held financially responsible for any and all fines related to work tasks that are not specified by the Contractors)/Subcontractor(s) below. Name: Signature: Peter Rosencrans Title: Date: Company Name: 385 Bway Saratoga, LLC L The LA GROUP Landscape Architecture & Engineering P.C. Page 14 Stormwater Pollution Prevention Plan Contractor and Subcontractor Certification 385 Broadway Mixed -Use Building The LA Group Project Number -2018050 1 hereby certify that 1 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. 1 also understand that the owner or operator must comply with the terms and conditions 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, 1 understand that certifying false, incorrect or inaccurate information is a violation of the referenced permit and the laws of the State of New York and could subject me to criminal, civil and/or administrative proceeding. Name Title Signature Date Company Name Address City, State, Zip Phone Number L The LA GROUP Landscape Architecture & Engineering P.C. Page 15 1. 2. SWPPP Components You 3. Are Responsible For 4. 5. 6. Name of Trained Individual Responsible for SWPPP Implementation Title Signature of Trained Individual Responsible for SWPPP Implementation Date L The LA GROUP Landscape Architecture & Engineering P.C. Page 15 Stormwater Pollution Prevention Plan Contractor and Subcontractor Certification 385 Broadway Mixed -Use Building The LA Group Project Number -2018050 1 hereby certify that 1 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. 1 also understand that the owner or operator must comply with the terms and conditions 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, 1 understand that certifying false, incorrect or inaccurate information is a violation of the referenced permit and the laws of the State of New York and could subject me to criminal, civil and/or administrative proceeding. Name Title Signature Date Company Name Address City, State, Zip Phone Number L The LA GROUP Landscape Architecture & Engineering P.C. Page 16 1. 2. SWPPP Components You 3. Are Responsible For 4. 5. 6. Name of Trained Individual Responsible for SWPPP Implementation Title Signature of Trained Individual Responsible for SWPPP Implementation Date L The LA GROUP Landscape Architecture & Engineering P.C. Page 16 Stormwater Pollution Prevention Plan Contractor and Subcontractor Certification 385 Broadway Mixed -Use Building The LA Group Project Number -2018050 1 hereby certify that 1 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. 1 also understand that the owner or operator must comply with the terms and conditions 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, 1 understand that certifying false, incorrect or inaccurate information is a violation of the referenced permit and the laws of the State of New York and could subject me to criminal, civil and/or administrative proceeding. Name Title Signature Date Company Name Address City, State, Zip Phone Number L The LA GROUP Landscape Architecture & Engineering P.C. Page 17 1. 2. SWPPP Components You 3. Are Responsible For 4. 5. 6. Name of Trained Individual Responsible for SWPPP Implementation Title Signature of Trained Individual Responsible for SWPPP Implementation Date L The LA GROUP Landscape Architecture & Engineering P.C. Page 17 Stormwater Pollution Prevention Plan Contractor and Subcontractor Certification 385 Broadway Mixed -Use Building The LA Group Project Number -2018050 1 hereby certify that 1 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. 1 also understand that the owner or operator must comply with the terms and conditions 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, 1 understand that certifying false, incorrect or inaccurate information is a violation of the referenced permit and the laws of the State of New York and could subject me to criminal, civil and/or administrative proceeding. Name Title Signature Date Company Name Address City, State, Zip Phone Number L The LA GROUP Landscape Architecture & Engineering P.C. Page 18 1. 2. SWPPP Components You 3. Are Responsible For 4. 5. 6. Name of Trained Individual Responsible for SWPPP Implementation Title Signature of Trained Individual Responsible for SWPPP Implementation Date L The LA GROUP Landscape Architecture & Engineering P.C. Page 18 Stormwater Pollution Prevention Plan 385 Broadway Mixed -Use Building The LA Group Project Number -2018050 11.0 DEFINITIONS Construction Activity(ies) - means any clearing, grading, excavation, filling, demolition, or stockpiling activities that result in soil disturbance. Clearing activities can include, but are not limited to, logging equipment operation, the cutting and skidding of trees, tree removal, stump removal and/or brush removal. Construction activity does not include routine maintenance that is performed to maintain the original line and grade, hydraulic capacity, or original purpose of a facility. Construction Phasing Plan - a plan designed to construct particular portions of an individual project at different times. Phasing is often used when a project is very large to limit the disturbance at a single time to 5 acres per phase. Erosion and Sediment Control Practices — temporary measures installed prior to construction and maintained during construction to temporarily treat any stormwater runoff. Once construction is completed and post -construction stormwater management practices are installed and the site is stabilized, the erosion and sediment control practices are removed from the site. 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 pervious surface has been established; or other equivalent stabilization measures, such as permanent landscape mulches, rock rip -rap or washed/crushed stone have been applied on all disturbed areas that are not covered by permanent structures, concrete pavement. Green Infrastructure — in the context of stormwater management, the term green infrastructure includes a wide array of practices at multiple scales to manage and treat stormwater, maintain and restore natural hydrology and ecological function by infiltration, evapotranspiration, capture and reuse of stormwater, and establishment of natural vegetative features. On a regional scale, green infrastructure is the preservation and restoration of natural landscape features, such as forests, floodplains and wetlands, coupled with policies such as infill and redevelopment that reduce overall imperviousness in a watershed or ecoregion. On the local scale green infrastructure consist of site and neighborhood specific practices and runoff reduction techniques. Such practices essentially result in runoff reduction and or establishment of habitat areas with significant utilization of soils, vegetation, and engineered media rather than traditional hardscape collection, conveyance and storage structures. Some examples include green roofs, trees and tree boxes, pervious pavement, rain gardens, vegetated swales, planters, reforestation and protection and enhancement of riparian buffers and floodplains. Impervious Area (Cover) - means all impermeable surfaces that cannot effectively infiltrate rainfall. This includes paved, concrete and gravel surfaces (i.e. parking lots, driveways, roads, runways, and sidewalks); building rooftops, and miscellaneous impermeable structures such as patios, pools, and sheds. L The LA GROUP Landscape Architecture & Engineering P.C. Page 19 Stormwater Pollution Prevention Plan 385 Broadway Mixed -Use Building The LA Group Project Number -2018050 Municipal Separate Storm Sewer (MS4) — a conveyance or system of conveyances (including roads with drainage systems, municipal streets, catch basins, curbs, gutters, ditches, man-made channels, or storm drains): 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 jurisdiction over disposal of sewage, industrial wastes, stormwater, or other 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 an authorized Indian tribal organization, or a designated and approved management agency under section 208 of the CWA that discharges to surface waters of the State. ii. Designed or used for collecting or conveying stormwater iii. Which is not a combined sewer iv. Which is not part of a Publicly Owned Treatment Works (POTW) as defined at 40 CFR 122.2. Notice of Intent — a standardized format notification sent to the NYSDEC to inform them of the proposed activity to be sent after the SWPPP has been completed. Owner or Operator — means the person, persons or legal entity which owns or leases the property on which the construction activity is occurring; and/or an entity that has operational control over the construction plans and specifications, including the ability to make modifications to the plans and specifications. Post -Construction Stormwater Management Practices — permanent devices constructed or installed onsite to treat stormwater from a site when construction is completed. Qualified Inspector - a Licensed Professional Engineer, Certified Professional in Erosion and Sediment Control (CPESC), Registered Landscape Architect, 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 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 qualified inspector shall receive 4 hours of training every 3 years. Regulated, Traditional Land Use Control MS4 - means a city, town, or village with land use control authority that is required to gain coverage under New York State DEC's SPDES General Permit for Stormwater Discharges from Municipal Separate Stormwater Sewer Systems (MS4s). Sequence of Operations — the individual steps and their specific order which are undertaken in order to construct a project or a given phase of a project from beginning to end. (i.e. clearing, grading, foundation work, landscaping, etc.) L The LA GROUP Landscape Architecture & Engineering P.C. Page 20 Stormwater Pollution Prevention Plan 385 Broadway Mixed -Use Building The LA Group Project Number -2018050 State Pollutant Discharge Elimination System (SPDES) —means the system established pursuant to Article 17 of the Environmental Conservation Law (ECL) and 6 NYCRR Part 750 for issuance of permits authorizing discharges to the waters of the state. Stormwater Pollution Prevention Plan (SWPPP) - a report that is compiled providing detailed information about the proposed activity and the specifics to how the stormwater will be managed during construction and after construction is completed. Surface Waters of the State - shall be construed to include lakes, bays, sounds, ponds, impounding reservoirs, springs, rivers, streams, creeks, estuaries, marshes, inlets, canals, the Atlantic Ocean, within the territorial seas of the state of New York and all other bodies of surface water, natural or artificial, inland or coastal, fresh or salt, public or private (except those private waters that do not combine or effect a junction with natural surface or underground waters), which are wholly or partially within or bordering the state or within its jurisdiction. Waters of the state are further defined in 6 NYCRR Parts 800-941. Temporary Stabilization — means that exposed soil has been covered with material(s) as set forth in the technical standard, New York Standards and Specifications for Erosion and Sediment Control, to prevent the exposed soil from eroding. The materials can include, but are not limited to, mulch, seed and mulch, and erosion control mats (e.g. jute twisted yarn, excelsior wood fiber mats). Trained Contractor — means an employee from a contracting (construction) company responsible for the day to day implementation of the SWPPP. The trained contractor must have received 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 qualified inspector shall receive 4 hours of training every 3 years. It can also mean an employee from the contracting (construction) company that meets the qualified inspector qualifications (e.g. licensed Professional Engineer, Certified Professional in Erosion and Sediment Control (CPESC), Registered Landscape Architect, 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 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. L The LA GROUP Landscape Architecture & Engineering P.C. Page 21 Appendix A HydroCAD Calculations and Storm Data v ca00 c LA 6 I? I? 00 'o In inN CN (3) z (3j > < > o 10 V) -ry > Na 60 I Co Q) 0 0, v Lr) Ln cc LA 3: 00 Lr, 2 00 m -0 .2— 3: z Lu co lu rn L 11 z, M —i < II O co O O >i < 302— LU LU -� 2131VMW21015X dd),,g ONUSIxl is O/ Uh O C, of M 'o o CO -- o o 00 Subcat 1 AP -1 (3) Subcat 3 AP -1 Subcat 2 Subcat Reach 4on Link Routing Diagram for Pre -Development —Burns _ 385 Broadway Prepared by The LA Group, Printed 5/24/2018 HydroCADO 10.00-21 s/n 00439 © 2018 HydroCAD Software Solutions LLC Pre-Development—Burns-385 Broadway Prepared by The LA Group Printed 5/24/2018 HydroCADO 10.00-21 s/n 00439 © 2018 HydroCAD Software Solutions LLC Page 2 Area Listing (all nodes) Area CN Description (acres) (subcatchment-numbers) 0.057 39 >75% Grass cover, Good, HSG A (21 3) 0.730 98 Paved parking, HSG A (1, 2, 3) 0.787 94 TOTAL AREA Pre-Development—Burns-385 Broadway Prepared by The LA Group Printed 5/24/2018 HydroCADO 10.00-21 s/n 00439 © 2018 HydroCAD Software Solutions LLC Page 3 Soil Listing (all nodes) Area Soil Subcatchment (acres) Group Numbers 0.787 HSG A 1, 2, 3 0.000 HSG B 0.000 HSG C 0.000 HSG D 0.000 Other 0.787 TOTAL AREA Pre-Development—Burns-385 Broadway Prepared by The LA Group HydroCADO 10.00-21 s/n 00439 © 2018 HydroCAD Software Solutions LLC Printed 5/24/2018 Page 4 Ground Covers (all nodes) HSG -A HSG -B HSG -C HSG -D Other Total Ground Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.057 0.000 0.000 0.000 0.000 0.057 >75% Grass cover, Good 2, 3 0.730 0.000 0.000 0.000 0.000 0.730 Paved parking 1, 2, 3 0.787 0.000 0.000 0.000 0.000 0.787 TOTAL AREA Pre -Development _Burns_385 Broadway Type 11 24 -hr 1 -year Rainfall=2.15" Prepared by The LA Group Printed 5/24/2018 HydroCADO 10.00-21 s/n 00439 © 2018 HydroCAD Software Solutions LLC Page 5 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR -20 method, UH=SCS, Weighted -CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 1: Subcat 1 Runoff Area=19,203 sf 100.00% Impervious Runoff Depth>1.79" Tc=6.0 min CN=98 Runoff=1.29 cfs 0.066 of Subcatchment2: Subcat 2 Runoff Area=0.144 ac 92.89% Impervious Runoff Depth>1.44" Tc=6.0 min CN=94 Runoff=0.37 cfs 0.017 of Subcatchment3: Subcat 3 Runoff Area=0.202 ac 76.81% Impervious Runoff Depth>0.78" Tc=6.0 min CN=84 Runoff=0.30 cfs 0.013 of Link AP -1: AP -1 Inflow=1.94 cfs 0.096 of Primary=1.94 cfs 0.096 of Total Runoff Area = 0.787 ac Runoff Volume = 0.096 of Average Runoff Depth = 1.47" 7.25% Pervious = 0.057 ac 92.75% Impervious = 0.730 ac Pre-Development—Burns-385 Broadway Type 11 24 -hr 10 -year Rainfall=3.75" Prepared by The LA Group Printed 5/24/2018 HydroCADO 10.00-21 s/n 00439 © 2018 HydroCAD Software Solutions LLC Page 6 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR -20 method, UH=SCS, Weighted -CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 1: Subcat 1 Runoff Area=19,203 sf 100.00% Impervious Runoff Depth>3.24" Tc=6.0 min CN=98 Runoff=2.28 cfs 0.119 of Subcatchment2: Subcat 2 Runoff Area=0.144 ac 92.89% Impervious Runoff Depth>2.89" Tc=6.0 min CN=94 Runoff=0.70 cfs 0.035 of Subcatchment3: Subcat 3 Runoff Area=0.202 ac 76.81% Impervious Runoff Depth>1.99" Tc=6.0 min CN=84 Runoff=0.74 cfs 0.034 of Link AP -1: AP -1 Inflow=3.72 cfs 0.187 of Primary=3.72 cfs 0.187 of Total Runoff Area = 0.787 ac Runoff Volume = 0.187 of Average Runoff Depth = 2.86" 7.25% Pervious = 0.057 ac 92.75% Impervious = 0.730 ac Pre-Development—Burns-385 Broadway Type 11 24 -hr 100 -year Rainfall=6.20" Prepared by The LA Group Printed 5/24/2018 HydroCADO 10.00-21 s/n 00439 © 2018 HydroCAD Software Solutions LLC Page 1 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR -20 method, UH=SCS, Weighted -CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 1: Subcat 1 Runoff Area=19,203 sf 100.00% Impervious Runoff Depth>5.45" Tc=6.0 min CN=98 Runoff=3.79 cfs 0.200 of Subcatchment2: Subcat 2 Runoff Area=0.144 ac 92.89% Impervious Runoff Depth>5.12" Tc=6.0 min CN=94 Runoff=1.21 cfs 0.062 of Subcatchment3: Subcat 3 Runoff Area=0.202 ac 76.81% Impervious Runoff Depth>4.10" Tc=6.0 min CN=84 Runoff=1.46 cfs 0.069 of Link AP -1: AP -1 Inflow=6.46 cfs 0.331 of Primary=6.46 cfs 0.331 of Total Runoff Area = 0.787 ac Runoff Volume = 0.331 of Average Runoff Depth = 5.04" 7.25% Pervious = 0.057 ac 92.75% Impervious = 0.730 ac Pre-Development—Burns-385 Broadway Type 11 24 -hr 100 -year Rainfall=6.20" Prepared by The LA Group Printed 5/24/2018 HydroCADO 10.00-21 s/n 00439 © 2018 HydroCAD Software Solutions LLC Page 2 Summary for Subcatchment 1: Subcat 1 Runoff = 3.79 cfs @ 11.96 hrs, Volume= 0.200 af, Depth> 5.45" Runoff by SCS TR -20 method, UH=SCS, Weighted -CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24 -hr 100 -year Rainfall=6.20" Area (sf) CN Description 195203 98 Paved parking, HSG A 191203 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Summary for Subcatchment 2: Subcat 2 Runoff = 1.21 cfs @ 11.96 hrs, Volume= 0.062 af, Depth> 5.12" Runoff by SCS TR -20 method, UH=SCS, Weighted -CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24 -hr 100 -year Rainfall=6.20" Area (ac) CN DescriDtion 0.010 39 >75% Grass cover, Good, HSG A 0.134 98 Paved parking, HSG A 0.144 94 Weighted Average 0.010 7.11% Pervious Area 0.134 92.89% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Summary for Subcatchment 3: Subcat 3 Runoff = 1.46 cfs @ 11.97 hrs, Volume= 0.069 af, Depth> 4.10" Runoff by SCS TR -20 method, UH=SCS, Weighted -CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24 -hr 100 -year Rainfall=6.20" Area (ac) CN Description 0.047 39 >75% Grass cover, Good, HSG A 0.155 98 Paved parking, HSG A 0.202 84 Weighted Average 0.047 23.19% Pervious Area 0.155 76.81 % Impervious Area Pre-Development—Burns-385 Broadway Type 11 24 -hr 100 -year Rainfall=6.20" Prepared by The LA Group Printed 5/24/2018 HydroCADO 10.00-21 s/n 00439 © 2018 HydroCAD Software Solutions LLC Page 3 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Summary for Link AP -1: AP -1 Inflow Area = 0.787 ac, 92.75% Impervious, Inflow Depth > 5.04" for 100 -year event Inflow = 6.46 cfs @ 11.96 hrs, Volume= 0.331 of Primary = 6.46 cfs @ 11.96 hrs, Volume= 0.331 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs HYDROCAD CALCULATIONS POST DEVELOPMENT (4) SMP-2 O Subcat 4 Upper Green Rovf Sub.,at 1 1CB P > 12" Culp SMP -1 Subcat 3 Lower Green Roof Subcat Reach Aon Link O Subcat 2 P-1 Post-Development—Burns-385 Broadway Prepared by The LA Group Printed 5/24/2018 HydroCADO 10.00-21 s/n 00439 © 2018 HydroCAD Software Solutions LLC Page 2 Area Listing (all nodes) Area CN Description (acres) (subcatchment-numbers) 0.112 39 >75% Grass cover, Good, HSG A (1, 2, 31 4) 0.671 98 Paved parking, HSG A (1, 2, 3, 4) 0.783 90 TOTAL AREA Post-Development—Burns-385 Broadway Prepared by The LA Group Printed 5/24/2018 HydroCADO 10.00-21 s/n 00439 © 2018 HydroCAD Software Solutions LLC Page 3 Soil Listing (all nodes) Area Soil Subcatchment (acres) Group Numbers 0.783 HSG A 1, 2, 3, 4 0.000 HSG B 0.000 HSG C 0.000 HSG D 0.000 Other 0.783 TOTAL AREA Post-Development—Burns-385 Broadway Prepared by The LA Group HydroCADO 10.00-21 s/n 00439 © 2018 HydroCAD Software Solutions LLC Printed 5/24/2018 Page 4 Ground Covers (all nodes) HSG -A HSG -B HSG -C HSG -D Other Total Ground Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.112 0.000 0.000 0.000 0.000 0.112 >75% Grass cover, Good 1, 2, 3, 4 0.671 0.000 0.000 0.000 0.000 0.671 Paved parking 1, 2, 3, 4 0.783 0.000 0.000 0.000 0.000 0.783 TOTAL AREA Post -Development -Burns -385 Broadway Type 11 24 -hr 1 -year Rainfall=2.15" Prepared by The LA Group Printed 5/24/2018 HydroCADO 10.00-21 s/n 00439 © 2018 HydroCAD Software Solutions LLC Page 5 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR -20 method, UH=SCS, Weighted -CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 1: Subcat 1 Runoff Area=20.349 sf 99.50% Impervious Runoff Depth>1.79" Tc=6.0 min CN=98 Runoff=1.36 cfs 0.070 of Subcatchment2: Subcat 2 Runoff Area=0.070 ac 68.63% Impervious Runoff Depth>0.55" Tc=6.0 min CN=79 Runoff=0.07 cfs 0.003 of Subcatchment3: Subcat 3 Runoff Area=0.120 ac 75.53% Impervious Runoff Depth>0.78" Tc=6.0 min CN=84 Runoff=0.18 cfs 0.008 of Subcatchment4: Subcat 4 Runoff Area=0.126 ac 53.40% Impervious Runoff Depth>0.28" Tc=6.0 min CN=71 Runoff=0.06 cfs 0.003 of Pond 1 P: 12" Culvert Peak Elev=299.27' Inflow=1.58 cfs 0.080 of 12.0" Round Culvert n=0.013 L=20.0' S=0.0200'/' Outflow=1.58 cfs 0.080 of Pond SMP -1: Lower Green Roof Peak EIev=307.60' Storage=3 cf Inflow=0.18 cfs 0.008 of Primary=0.18 cfs 0.008 of Secondary=0.00 cfs 0.000 of Outflow=0.18 cfs 0.008 of Pond SMP -2: Upper Green Roof Peak EIev=347.00' Storage=1 cf Inflow=0.06 cfs 0.003 of Primary=0.06 cfs 0.003 of Secondary=0.00 cfs 0.000 of Outflow=0.06 cfs 0.003 of Link AP -1: AP -1 Inflow=1.65 cfs 0.084 of Primary=1.65 cfs 0.084 of Total Runoff Area = 0.783 ac Runoff Volume = 0.084 of Average Runoff Depth = 1.28" 14.35% Pervious = 0.112 ac 85.65% Impervious = 0.671 ac Post -Development -Burns -385 Broadway Type 11 24 -hr 10 -year Rainfall=3.75" Prepared by The LA Group Printed 5/24/2018 HydroCADO 10.00-21 s/n 00439 0 2018 HydroCAD Software Solutions LLC Page 6 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR -20 method, UH=SCS, Weighted -CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 1: Subcat 1 Runoff Area=20.349 sf 99.50% Impervious Runoff Depth>3.24" Tc=6.0 min CN=98 Runoff=2.42 cfs 0.126 of Subcatchment2: Subcat 2 Runoff Area=0.070 ac 68.63% Impervious Runoff Depth>1.62" Tc=6.0 min CN=79 Runoff=0.21 cfs 0.009 of Subcatchment3: Subcat 3 Runoff Area=0.120 ac 75.53% Impervious Runoff Depth>1.99" Tc=6.0 min CN=84 Runoff=0.44 cfs 0.020 of Subcatchment4: Subcat 4 Runoff Area=0.126 ac 53.40% Impervious Runoff Depth>1.11" Tc=6.0 min CN=71 Runoff=0.27 cfs 0.012 of Pond 1 P: 12" Culvert Peak Elev=299.65' Inflow=2.84 cfs 0.158 of 12.0" Round Culvert n=0.013 L=20.0' S=0.0200'/' Outflow=2.84 cfs 0.158 of Pond SMP -1: Lower Green Roof Peak EIev=308.29' Storage=146 cf Inflow=0.44 cfs 0.020 of Primary=0.17 cfs 0.020 of Secondary=0.00 cfs 0.000 of Outflow=0.17 cfs 0.020 of Pond SMP -2: Upper Green Roof Peak EIev=347.00' Storage=5 cf Inflow=0.27 cfs 0.012 of Primary=0.26 cfs 0.012 of Secondary=0.00 cfs 0.000 of Outflow=0.26 cfs 0.012 of Link AP -1: AP -1 Inflow=3.05 cfs 0.167 of Primary=3.05 cfs 0.167 of Total Runoff Area = 0.783 ac Runoff Volume = 0.167 of Average Runoff Depth = 2.56" 14.35% Pervious = 0.112 ac 85.65% Impervious = 0.671 ac Post -Development -Burns -385 Broadway Type 11 24 -hr 100 -year Rainfall=6.20" Prepared by The LA Group Printed 5/24/2018 HydroCADO 10.00-21 s/n 00439 0 2018 HydroCAD Software Solutions LLC Page 1 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR -20 method, UH=SCS, Weighted -CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 1: Subcat 1 Runoff Area=20.349 sf 99.50% Impervious Runoff Depth>5.45" Tc=6.0 min CN=98 Runoff=4.02 cfs 0.212 of Subcatchment2: Subcat 2 Runoff Area=0.070 ac 68.63% Impervious Runoff Depth>3.59" Tc=6.0 min CN=79 Runoff=0.46 cfs 0.021 of Subcatchment3: Subcat 3 Runoff Area=0.120 ac 75.53% Impervious Runoff Depth>4.10" Tc=6.0 min CN=84 Runoff=0.87 cfs 0.041 of Subcatchment4: Subcat 4 Runoff Area=0.126 ac 53.40% Impervious Runoff Depth>2.82" Tc=6.0 min CN=71 Runoff=0.66 cfs 0.030 of Pond 1 P: 12" Culvert Peak EIev=300.81' Inflow=4.97 cfs 0.283 of 12.0" Round Culvert n=0.013 L=20.0' S=0.0200'/' Outflow=4.97 cfs 0.283 of Pond SMP -1: Lower Green Roof Peak EIev=308.57' Storage=352 cf Inflow=0.87 cfs 0.041 of Primary=0.17 cfs 0.035 of Secondary=0.42 cfs 0.006 of Outflow=0.59 cfs 0.041 of Pond SMP -2: Upper Green Roof Peak EIev=347.02' Storage=21 cf Inflow=0.66 cfs 0.030 of Primary=0.61 cfs 0.030 of Secondary=0.00 cfs 0.000 of Outflow=0.61 cfs 0.030 of Link AP -1: AP -1 Inflow=5.43 cfs 0.304 of Primary=5.43 cfs 0.304 of Total Runoff Area = 0.783 ac Runoff Volume = 0.304 of Average Runoff Depth = 4.65" 14.35% Pervious = 0.112 ac 85.65% Impervious = 0.671 ac Post-Development—Burns-385 Broadway Type 11 24 -hr 100 -year Rainfall=6.20" Prepared by The LA Group Printed 5/24/2018 HydroCADO 10.00-21 s/n 00439 © 2018 HydroCAD Software Solutions LLC Page 2 Summary for Subcatchment 1: Subcat 1 Runoff = 4.02 cfs @ 11.96 hrs, Volume= 0.212 af, Depth> 5.45" Runoff by SCS TR -20 method, UH=SCS, Weighted -CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24 -hr 100 -year Rainfall=6.20" Area (sf) CN Description 101 39 >75% Grass cover, Good, HSG A 201248 98 Paved parking, HSG A 201349 98 Weighted Average 101 0.50% Pervious Area 205248 99.50% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Summary for Subcatchment 2: Subcat 2 Runoff = 0.46 cfs @ 11.97 hrs, Volume= 0.021 af, Depth> 3.59" Runoff by SCS TR -20 method, UH=SCS, Weighted -CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24 -hr 100 -year Rainfall=6.20" Area (ac) CN Description 0.022 39 >75% Grass cover, Good, HSG A 0.048 98 Paved parking, HSG A 0.070 79 Weighted Average 0.022 31.37% Pervious Area 0.048 68.63% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Summary for Subcatchment 3: Subcat 3 Runoff = 0.87 cfs @ 11.97 hrs, Volume= 0.041 af, Depth> 4.10" Runoff by SCS TR -20 method, UH=SCS, Weighted -CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24 -hr 100 -year Rainfall=6.20" Area (ac) CN Description 0.029 39 >75% Grass cover, Good, HSG A 0.091 98 Paved parking, HSG A 0.120 84 Weighted Average 0.029 24.47% Pervious Area 0.091 75.53% Impervious Area Post -Development -Burns -385 Broadway Type 11 24 -hr 100 -year Rainfall=6.20" Prepared by The LA Group Printed 5/24/2018 HydroCADO 10.00-21 s/n 00439 0 2018 HydroCAD Software Solutions LLC Page 3 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Summary for Subcatchment 4: Subcat 4 Runoff = 0.66 cfs @ 11.97 hrs, Volume= 0.030 af, Depth> 2.82" Runoff by SCS TR -20 method, UH=SCS, Weighted -CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24 -hr 100 -year Rainfall=6.20" Area (ac) CN Description 0.059 39 >75% Grass cover, Good, HSG A 0.067 98 Paved parking, HSG A 0.126 71 Weighted Average 0.059 46.60% Pervious Area 0.067 53.40% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Inflow Area = 0.713 ac, Inflow = 4.97 cfs @ Outflow = 4.97 cfs @ Primary = 4.97 cfs @ Summary for Pond 1 P: 12" Culvert 87.32% Impervious, Inflow Depth > 4.76" 11.97 hrs, Volume= 0.283 of 11.97 hrs, Volume= 0.283 af, 11.97 hrs, Volume= 0.283 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 300.81' @ 11.97 hrs for 100 -year event Atten= 0%, Lag= 0.0 min Device Routing Invert Outlet Devices #1 Primary 298.59' 12.0" Round Culvert L= 20.0' Ke= 0.500 Inlet / Outlet Invert= 298.59'/ 298.19' S= 0.0200 T Cc= 0.900 n= 0.013, Flow Area= 0.79 sf Primary OutFlow Max=4.85 cfs @ 11.97 hrs HW=300.73' (Free Discharge) Ll =Culvert (Inlet Controls 4.85 cfs @ 6.17 fps) Summary for Pond SMP -1: Lower Green Roof Inflow Area = 0.120 ac, Inflow = 0.87 cfs @ Outflow = 0.59 cfs @ Primary = 0.17 cfs @ Secondary = 0.42 cfs @ 75.53% Impervious, Inflow Depth > 4.10" 11.97 hrs, Volume= 0.041 of 12.04 hrs, Volume= 0.041 af, 11.70 hrs, Volume= 0.035 of 12.04 hrs, Volume= 0.006 of for 100 -year event Atten= 32%, Lag= 4.5 min Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs / 2 Post -Development -Burns -385 Broadway Type 11 24 -hr 100 -year Rainfall=6.20" Prepared by The LA Group Printed 5/24/2018 HydroCADO 10.00-21 s/n 00439 0 2018 HydroCAD Software Solutions LLC Page 4 Peak Elev= 308.57' @ 12.04 hrs Surf.Area= 743 sf Storage= 352 cf Plug -Flow detention time= 9.2 min calculated for 0.041 of (99% of inflow) Center -of -Mass det. time= 6.5 min ( 769.6 - 763.1 ) Volume Invert Avail.Storage Storage Description #1 307.59' 370 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq -ft) (%) (cubic -feet) (cubic -feet) 307.59 743 0.0 0 0 307.76 743 40.0 51 51 308.26 743 20.0 74 125 308.27 743 100.0 7 132 308.59 743 100.0 238 370 Device Routing Invert Outlet Devices #1 Primary 307.59' 10.000 in/hr Exfiltration over Surface area #2 Secondary 308.37' 6.0" Horiz. Orifice/Grate C=0.600 Limited to weir flow at low heads Primary OutFlow Max=0.17 cfs @ 11.70 hrs HW=307.60' (Free Discharge) L1=Exfiltration (Exfiltration Controls 0.17 cfs) Secondary OutFlow Max=0.41 cfs @ 12.04 hrs HW=308.56' (Free Discharge) L2=0rifice/Grate (Orifice Controls 0.41 cfs @ 2.10 fps) Summary for Pond SMP -2: Upper Green Roof Inflow Area = 0.126 ac, 53.40% Impervious, Inflow Depth > 2.82" for 100 -year event Inflow = 0.66 cfs @ 11.97 hrs, Volume= 0.030 of Outflow = 0.61 cfs @ 11.98 hrs, Volume= 0.030 af, Atten= 8%, Lag= 0.1 min Primary = 0.61 cfs @ 11.98 hrs, Volume= 0.030 of Secondary = 0.00 cfs @ 5.00 hrs, Volume= 0.000 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs / 2 Peak Elev= 347.02' @ 12.00 hrs Surf.Area= 2,572 sf Storage= 21 cf Plug -Flow detention time= (not calculated: outflow precedes inflow) Center -of -Mass det. time= (not calculated: outflow precedes inflow) Volume Invert Avail.Storage Storage Description #1 347.00' 1,281 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq -ft) (%) (cubic -feet) (cubic -feet) 347.00 25572 0.0 0 0 347.17 25572 40.0 175 175 347.67 25572 20.0 257 432 347.68 21572 100.0 26 458 348.00 25572 100.0 823 15281 Post-Development—Burns-385 Broadway Type 11 24 -hr 100 -year Rainfall=6.20" Prepared by The LA Group Printed 5/24/2018 HydroCADO 10.00-21 s/n 00439 0 2018 HydroCAD Software Solutions LLC Page 5 Device Routing Invert Outlet Devices #1 Primary 347.00' 10.000 in/hr Exfiltration over Surface area #2 Secondary 347.78' 6.0" Horiz. Orifice/Grate C=0.600 Limited to weir flow at low heads Primary OutFlow Max=0.60 cfs @ 11.98 hrs HW=347.02' (Free Discharge) L1=Exfiltration (Exfiltration Controls 0.60 cfs) Secondary OutFlow Max=0.00 cfs @ 5.00 hrs HW=347.00' (Free Discharge) L2=Orifice/Grate (Controls 0.00 cfs) Summary for Link AP -1: AP -1 Inflow Area = 0.783 ac, 85.65% Impervious, Inflow Depth > 4.65" for 100 -year event Inflow = 5.43 cfs @ 11.97 hrs, Volume= 0.304 of Primary = 5.43 cfs @ 11.97 hrs, Volume= 0.304 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Stormwater Practice Sizing Job Name and # 385 Broadway Water Quality Volume Calculation 5/24/2018 WQv = [(P)(Rv)(A)]/12 Where: Rv = 0.05 + 0.009(I) I =impervious cover in percent P = 90% rainfall (see Figure 4.1 in NYS Stormwater Management Design Manual) A Area in acres Required WQv New Impervious Impervious 100.00% Rv 0.95 90% Rainfall 1.15 Area in Square Feet 11350 WQv Required = 123 ft 0.003 ac-ft Disturbed Impervious %Impervious 100.00% Rv 0.95 90% Rainfall 1.15 Area in Square Feet 29,447 WQv Calculated = 2681 ft 0.062 ac-ft 25% WQv Required= 670 ft 3 0.015 ac-ft Total WQv Required= 793 ft3 0.018 ac-ft Extensive Green Roof Worksheet WQv <_ VSM + VDL + (DP x AGR) VSM = AGR x DSM x nSM VDL = AGR x DDL x nDL Enter Site Data For Drainage Area to be Treated by Practice Catchment Impervious Percent Total Area Rv WQv Precipitation Description Number Area Impervious (Acres) (Acres) (ft 3) (in) 2 0.20 0.20 100% 0.95 793 1.15 0 Enter Parameters for Proposed Green Roof Calculations Notes Green Roof Surface Area AGR 3160 ft 2 Volume Provided In Drainage Layer VDL 215 Depth of Soil Media DSM 0.5 ft 0.25-0.5 Depth of Drainage Layer DDL 0.17 ft Depth of Ponding Above Surface DP 0.08 ft Porosity of the Soil Media nSM 20% Max 20°0 Porosity of the Drainage Layer nDL 40% Max 25°0 Runoff Reduction 793 ft rCr%-A n -g m ed e u m Osainage o4 rasion. Walter 44Stcyragie .and Rc)�e3t ELarrj4er I�aisl�r'I:�ors Mernt>rane PrcAecli+0n arra Root ElLarr:er RoIofi M-ernb�nane StrUCtLXFa1 :SUj:), rt �1. r. - __ -14U-,fir Calculations Volume Provided In Soil Media VSM 316 ft Volume Provided In Drainage Layer VDL 215 ft3 Volume in Ponding Layer 262 ft3 Storage Volume Provided in Green Roof 793 ft3 Runoff Reduction 793 ft rCr%-A n -g m ed e u m Osainage o4 rasion. Walter 44Stcyragie .and Rc)�e3t ELarrj4er I�aisl�r'I:�ors Mernt>rane PrcAecli+0n arra Root ElLarr:er RoIofi M-ernb�nane StrUCtLXFa1 :SUj:), rt �1. r. - __ -14U-,fir USDA United States Department of Agriculture NRCS Natural Resources Conservation Service A product of the National Cooperative Soil Survey, a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local participants Custom Soil Resource Report for Saratoga County, New York April 30, 2018 Preface 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 HowSoil Surveys Are Made..................................................................................5 SoilMap.................................................................................................................. 8 SoilMap................................................................................................................9 Legend................................................................................................................10 MapUnit Legend................................................................................................ 11 MapUnit Descriptions.........................................................................................11 SaratogaCounty, New York............................................................................13 WnB Windsor loamy sand, 3 to 8 percent slopes.....................................13 References............................................................................................................15 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 measurements 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 for the 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 0 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. 0 z Ln Ln it 0 ("1 OZ90LLti 0090LLP 0990LLP 0990LLP Ob50LLt7 M . 9 LV 0£L �. Ln i • r LO i r d F CV !moi a J O �b Ln ,ArW W U ` M Cl) u W N ry co 0 V! • E O • cn U _ r<-- 0 �— LO 8 1 LO tj !i t / jt 1` i1 ! m. r M 9T LV 0£L OZ90LLti z Ln Ln it 0 Q (Yl OZ90LLti z 0 Ln it 0 ("1 0090LLt7 0090LLti 0990LLIV 0990LLti OV90LLIV OZ50LLti 0050LLti M . 9 LV 0£L Lf� 00 4 - Q j 00 � c N Ln -12 �o t00)w N 0000 LO En E x c� �,; Aj a cl 3 -� o L. a � 0 L N (�01 L cl rn N o 0 //�/ fVI Q Q r6 o Q r� o L z Q z 0 Ln 0 (Yl Q M 9T LV 0£L O Q N ry N U L. O N ry O E O cn U O O N L W O +-. 4-0 L O U O W L N N O Q O ^^'' U cn L (� U • L O N S E N O p L E N U O E O N NZ. � L N O Z N CU U ' a m =m -§.., 0 4-0- 4. 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M O' 0> C �+ L O O t6 i� O Q L O V) CU N (n N j O O U) (/) +� t6 O _ U. o 3 >, O _ C L � O m (6 N _cn 76 1 (6 U N L > O � (6O a) _ O O L'O QO O L- (� m � O m m Nu) L m (Oj 0- O N cn A > O O N O O N in 'in a) O U W — U cn N O � p >O p (n > U t6 O j M L) Q m o p (n U) p U) 4-a D N E m U cn � cn m m Li U m L- � ) � cm o mm o U ) Q L O ma o L atm �o _ U) U) > O U) U) o m Q Z LL °a o L Lsi m J U) aCL =0 O U) o L 0 O `-' j O 0-J O cn 4- E L L w Q) Q Q) O .-. a) D (Ca C L D ❑� m m ,V 0- }, 0 Yi C in/+fir (� U) � _ O Q) _ m - � 0 U /O� DL Q /0 W OL � - +r U) a G — G G Li O 0 — — U) >, � a) a) a) U) > > � O � a) 4.► i U m a) O O Y a� U � i Q 0 U) 0 0 = O O U) U) 'F) 00 00 m U O L- � U CD CD c J J (1) 0- O (6 ix U) ca (1) U) C%) U) cn O U) c IL m � .L) ❑ 0 • o cn a Cl) O Custom Soil Resource Report Map Unit Legend 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. Within 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 Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI WnB Windsor loamy sand, 3 to 8 percent slopes 2.7 100.0% Totals for Area of Interest 2.7 100.0% 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. Within 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 air temperature. 39 to 55 degrees F Frost -free period. 140 to 240 days Farmland classification: Farmland of statewide importance Map Unit Composition Windsor, 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: Deltas, dunes, outwash plains, outwash terraces Landform position (three-dimensional): Riser, tread 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 Natural 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 Salinity, maximum in profile: Nonsaline (0.0 to 1.9 mmhos/cm) Available water storage in profile. Low (about 4.5 inches) Interpretive groups Land capability classification (irrigated). None specified Land capability classification (nonirrigated): 2s Hydrologic Soil Group: A Hydric soil rating. No 13 Custom Soil Resource Report Minor Components Hinckley, loamy sand Percent of map unit. 10 percent Landform: Deltas, kames, eskers, outwash plains Landform position (two-dimensional). Summit, shoulder, backslope Landform position (three-dimensional): Head slope, nose slope, side slope, crest, rise Down-slope shape. Convex Across -slope shape. Convex, linear Hydric soil rating. No Deerfield, loamy sand Percent of map unit. 5 percent Landform: Outwash plains, deltas, terraces Landform position (two-dimensional). Footslope Landform position (three-dimensional): Tread, talf Down-slope shape. Linear Across -slope shape. Linear Hydric soil rating. No 14 Custom Soil Resource Report United States Department of Agriculture, Natural Resources Conservation Service. National soil survey handbook, title 43041. http-//www.nres.usda.gov/wps/portal/ n res/deta i I/soi Is/scientists/?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_053624 United States Department of Agriculture, Soil Conservation Service. 1961. Land capability classification. U.S. Department of Agriculture Handbook 210. http:// www.nres.usda.gov/Internet/FSE_DOCUMENTS/nresl42p2_052290.pdf 16 Appendix C SWPPP Inspection Form 385 Broadway Mixed -Use Building WEEKLY SWPPP INSPECTION REPORT Inspector Name: Date: Signature (required): Time: Weather: Inspection #: Soil Conditions (dry, saturated, etc): Note: Digital photos, with date stamp required for all practices requiring corrective action, before and after, to be attached to the inspection report. YES NO N/A 1. ❑ ❑ ❑ 2. Routine Inspection. Date of last inspection: Inspection following rain event. Date/time of storm ending: Rainfall amount: Recorded by: 3. ❑ ❑ ❑ Is this a final site inspection? 4. ❑ ❑ ❑ Has site undergone final stabilization? ❑ ❑ ❑ If so, have all temporary erosion and sediment controls been removed? Site Disturbance (Indicate Locations on Plan) YES NO N/A 1. ❑ ❑ ❑ Areas previously disturbed, but have not undergone active site work in the last 14 days? 2. ❑ ❑ ❑ Areas disturbed within last 14 days? 3. ❑ ❑ ❑ Areas expected to be disturbed in next 14 days? 4. ❑ ❑ ❑ Do areas of steep slopes or complex stabilization issues exist? If "YES" explain: 5. ❑ ❑ ❑ Are there currently more than 5 acres of disturbed soil at the site? If so make sure there is an approval letter from NYS DEC. Additional Comments: Inspection of Erosion and Sediment Control Devices Type of Control Device Accumulation (if any) in % Repairs/Maintenance Needed 1. 2. 3. 4. 5. 6. Stabilization/Runoff YES NO N/A 1. ❑ ❑ ❑ Are all existing disturbed areas contained by control devices? Type of devices: 2. ❑ ❑ ❑ Are there areas that require stabilization within the next 14 days? Specify Area: 3. ❑ ❑ ❑ Have stabilization measures been initiated in inactive areas? 4. ❑ ❑ ❑ Is there current snow cover or frozen ground conditions? 5. ❑ ❑ ❑ Rills or gullies? 6. ❑ ❑ ❑ Slumping/deposition? 7. ❑ ❑ ❑ Loss of vegetation? 8. ❑ ❑ ❑ Lack of germination? 9. ❑ ❑ ❑ Loss of mulching? Receiving Structures/Water Bodies (Indicate locations where runoff leaves the project site on the site plan) YES NO N/A 1. ❑ ❑ ❑ Surface water swale or natural surface waterbody? If natural waterbody: Is waterbody located ❑ onsite, or ❑ adjacent to property boundary? Description of condition: 2. ❑ ❑ ❑ Municipal or community system? Inspect locations where runoff from project site enters the receiving waters and indicate if there is evidence of: a. ❑ ❑ ❑ Rills or gullies? b. ❑ ❑ ❑ Slumping/deposition? C. ❑ ❑ ❑ Loss of vegetation? d. ❑ ❑ ❑ Undermining of structures? e. ❑ ❑ ❑ Was there a discharge into the receiving water on the day of inspection? f. ❑ ❑ ❑ Is there evidence of turbidity, sedimentation, or oil in the receiving waters? Additional Comments: Inspection of Post -Construction Stormwater Management Control Devices Type of Control Device Phase of Construction Repairs/Maintenance Needed 1. 2. 3. 4. General Site Condition YES NO N/A 1. ❑ ❑ ❑ Have action items from previous reports been addressed? 2. ❑ ❑ ❑ Does routine maintenance of protection components occur on a regular basis? 3. ❑ ❑ ❑ Does cleaning and/or sweeping affected roadways occur, at minimum, daily? 4. ❑ ❑ ❑ Is debris and litter removed on a monthly basis, or as necessary? 5. ❑ ❑ ❑ Is the site maintained in an orderly manner? Describe the condition of all natural waterbodies within or adjacent to the project that receive runoff from the site: Contractors progress over last 7 days: Anticipated work to be begun in the next 7 days: Additional Comments: Visual Observations YES NO N/A 1. ❑ ❑ ❑ All erosion and sediment control measures have been installed/constructed? 2. ❑ ❑ ❑ All erosion and sediment control measures are being maintained properly? SUMMARY OF ACTION ITEMS TO REPAIR/REPLACE/MAINTAIN/CORRECT DEFICIENCIES Action Reported To (no signature required): Company: Appendix D Other SWPPP Forms Construction Sequence SWPPP Plan Changes Spill Response Form Stormwater Management Practice Maintenance Log The operator shall prepare a summary of construction status using the Construction Sequence Form below once every month. Significant deviations to the sequence and reasons for those deviations (i.e. weather, subcontractor availability, etc.), shall be noted by the contractor. The schedule shall be used to record the dates for initiation of construction, implementation of erosion control measures, stabilization, etc. A copy of this table will be maintained at the construction site and updated in addition to the individual Inspection Reports completed for each inspection. Construction Sequence Form Construction Activities Date (Identify name of planned practices) Complete 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. STORM WATER POLLUTION PREVENTION PLAN PLAN CHANGES, AUTHORIZATION, AND CHANGE CERTIFICATION CHANGES REQUIRED TO THE POLLUTION PREVENTION PLAN: REASONS FOR CHANGES: REQUESTED BY: DATE: AUTHORIZED BY: DATE: CERTIFICATION OF CHANGES: certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that false statements made herein are punishable as a Class A misdemeanor pursuant to Section 210.45 of the penal code. SIGNATURE: DATE: SPILL RESPONSE REPORT Within 1 hour of a spill discovery less than 2 gallons in volume the following must be notified: Peter Rosecrans, 385 Bway Saratoga, LLC (518)584-9007 Within 1 hour of a spill discovery greater than 2 gallons the following must be notified: Peter Rosecrans NYSDEC Spill Response Hotline 1-800-457-7362 Spill Response Contractor Material Spilled: Approximate Volume: Location: Distance to nearest down gradient drainage: Distance to nearest down gradient open water: Temporary control measures in place: Appendix E Historic Preservation/Endangered Species Documentation rk, RL"e PI Rol Ay, Gvam'*T A-1 LI Es --A Avv Ea -sl Ave Case A -31 -C, ;7- Z� __j At 0 eL C LO CL L Ln t: tib, Grp -Ir Lb zit M qt4 Lr21% 'JQI V3 r - it 0 0. Js Qpu CL Cn U3 Cn IJ. 0 j mto On Im 4JUDO Al L r; Is Uj up g�j AV W1 cj� LL LI -'I ply 41 f/P Jk sr V-. LS SL Aly r r$ t11 %", von M i7) Ut CM gerssojaibr SI �N al -n %ja n P re dick en Ln P 3� it, LR 0 C 13m r,6ojj.LJ1sL NNP 77) wyoon E a)CU @ C) 0 0 OD U r - 0 MM W C 0- 0 0 _0 En = — En m < Ci Cm CU C; 0 Z m F= 0 0 z a) m YU F= m a) a) 0 Z 0 T CO 00 CU a) r CN - E !E C) a, LO 6 0 CU w O < L) w LO W Z 0 w Cli 0 am CL m -Zca C5 6 En 0 W w 0 to a) CO a) O U) Co D [n0 JTF-, .z.NTO GA 6, A:NTHONY J. SCIROCCO City of Saratoga Springs CONMSSIONTR 19L UBLIC WORKS OFFICE OF P TImOTHY Jr CO&W 5 Lake Avenue DEP U7Y COINMSSIONER Saratoga Springs, New York 12866 Phone 518-587-3550 Fax 518-587-2417 FrI 0 A VC_ www.saratoga-springs.org NEW WATER SERVICE CONNECTION AGREEMENT & APPLICATION FORM 385 Bway Saratoga LLC Property Owner's Name: Property Address: 385 Broadway Sim of Tap (cheek one below): 1 D11 N,=leer of Dwellings: Project Nam& (if applicable): 385 Broadway Apartments Tax Map#: 165.59-1-77 AV( reater than I" t of water shall be defined as fourteon thousand (14,000) cubic feet of water per year. Contact the Water Dept at ext. 2502 for assistance with waWr use estimation and meter specifications before signing below. Estimated Cubic Feet of Water per Year: 15 C' C _. To be completed in full without any contingencies or protest, on or before the Building Inspector approval of the rough plumbing, including the installation of the water meter,, or at the time of the issuance of a tapping permit. Ile, undersigned represents to the Ciat they have full and complete authority to execute this document and fuid and commit the t developer to abide by the City Water Or an e. This agreement shall be binding on all of the undersigned transferees. T The undersigned acknowledges that a copy o is document will be delivered to all appropriate and necessary governmental entities. 385 Broadway LLC Authorized Signatuxe: Company Name. 13 Company Address: 72 '"triAve*lbany, NY 12203 Phone Number: (518) 456-7155 Fax Number: Date; .......... 11 ... ......... ..............o.....•.gas .6.................++..+., •..,.......,...»,.r.+•...e..-...,.....,...... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Departnent of Public Works Approval: Date: 385 Broadway Apartments 2018050 PROJECT DESCRIPTION The project proposes a mixed-use commercial/residential building at 385 Broadway in the City of Saratoga Springs, NY. Vehicular access to the site is from Division Street via a 20 -foot -wide access easement. The site is adjacent to the Saratoga Stadium Sports Bar and just north of the Druthers' Brewing Company Restaurant. The building is proposed to have 72 dwelling units and approximately 12,000 gross square feet of retail space. There will be a mix of micro, one and two-bedroom apartments in the building. For this study, the micro units are treated as one -bedrooms. There will be 12 two-bedroom units and 60 one -bedroom or micro units for a total of 84 bedrooms. EXISTING CONDITIONS Water Distribution — A 16 -inch ductile iron water main is present along the west side of Broadway in front of the site. There is also an 8 -inch main in Broadway but that main is located on the east side of the street. Historical hydrant flow test data in this area indicate static pressures of 76 and 88 psi. Residual pressures of between 66 and 84 psi were recorded with the hydrants flowing at approximately 1,250 gallons per minute. The theoretical available fire flow at 20 psi is approximately 4,000 gallons per minute. See Attachment A for hydrant flow test information. Sanitary Sewer — An existing 12 -inch vitrified clay sanitary sewer main runs along the west side of Broadway and flows to the south, then east down Phila Street. The City gravity collection system eventually takes the wastewater to the Saratoga County Sewer District Pump Station at High Rock Avenue and Warren Street. From there the wastewater is pumped to County trunk lines and the treatment plant in Mechanicville. SEWER AND WATER USAGE The table below provides information on the anticipated average potable water use and wastewater flow rates for the project. Water use and wastewater flow are estimated to be equal for this study. Table -Average Daily Flow (ADF) Retail: (12,000 square feet) x (0.10 gpd/sf)1= 11200 gpd Apartments: (84 bedrooms) x (I 10 gpd/ bedroom)' = 91240 bpd Total = 101440 gpd 385 Broadway Apartments 2018050 Summary of Design Flows Average daily flow for wastewater is estimated to be 9.7 gallons per minute (gpm) based on an 18 -hour day. Estimated peak hourly flow is 40.7 gpm (4.20 x average).2 Average daily demand for water is estimated to be approximately equal to the wastewater flow or 9.7 gpm. Instantaneous peak demand is estimated at 252 gpm based on the table below: Commercial: (12,000 square feet) x (0.06 gpm/sf)3 = 72 gpm Apartments: (72 residences) x (2.5 gpm/residence)3 = 18Q fpm Total = 252 gpm For the purposes of input into the City of Saratoga Springs water model, we offer the following estimated water demands for the project: • Average Day Demand is 9.7 gallons per minute (GPM) over the 18 -hour period. • Max Day Demand is 20.4 gallons per minute (GPM) based on twice the average. • Peak Hourly Flow is 40.7 gallons per minute (GPM) based on 4.20 times the average. • Fire Flow Demand is 1,000 gallons per minute (GPM) per ISO guidelines. PROPOSED CONDITIONS Water Distribution— To service the project, the existing 16 -inch ductile -iron water main along the western portion of Broadway will be tapped to provide a 6 -inch combined fire protection and domestic service lateral to the building. A combined fire protection and domestic waterline will be brought to the building's mechanical room where the domestic line will tee off and be metered. Fire suppression for the building will be provided by fire sprinklers. The nearest fire hydrant is located on the west side of Broadway immediately in front of the proposed building site. The minimum needed fire flow (NFF) is 1,000 gallons per minute at 20 psi for a duration of two hours according to the Insurance Services Office Guide for Determination of Needed Fire Flow for residential occupancies protected by an automatic fire sprinkler system. Fire flow test results in the immediate vicinity indicate adequate pressures and flows for this building. Connections and appurtenances, including tapping sleeves, mechanical joints, tees, isolation valves, thrust blocks, trenching, bedding, as well as testing and disinfection will all be specified in accordance with City of Saratoga Springs standards. 2 385 Broadway Apartments 2018050 Sanitary Sewer — Sanitary sewer service for the project will be provided by the City of Saratoga Springs 12 -inch vitrified clay sewer main along Broadway. A 6 -inch PVC sewer service from the proposed building will wye into the existing 12 -inch sewer main using a saddle connection. The sewer lateral will maintain a minimum slope of 2%. All sanitary sewer mains, laterals, manholes and manhole connections will be furnished, installed and tested according to City of Saratoga Springs standards. 1. From Table B-3, NYSDEC Design Standards for Intermediate Sized Wastewater Treatment Systems, dated March 5, 2014 2. From Figure 1, GLUMRB Recommended Standards for Wastewater Facilities Q = (18 + P %) = (4 + P %) where P =population in thousands 3. Table XIV - Ameen Community Water Systems Fifth Edition 3 ATTACHMENT A HYDRANT FLOW TEST DATA 1 11 1 1 I I 1 I I 0 1 1 1 1 f ui 1 1 n 1 1 1 1 1 1 1 i # 1 [ 1 1 LO iiia 1(0 r N 1 6 p 11 1 1 1 1 1 0 I I 1 I I C o r L 1 1 1 1 re 1 1 1 1 4 1 M, cni m, coil LL r Cz E rlj W Ln ''q X Ln LU LD co cr) C Ln Ln f'1+'i Ln C14 ro CL Q W■ J LL NI UJ L/i 0 00 CL LU Ln Ln LO z QD 0 LU to r%- 0 Lai 0 0 r'i 1 11 1 1 I I 1 I I 1 1 1 1 f ui 1 1 n 1 1 1 1 1 1 1 i # 1 [ 1 1 LO iiia 1(0 r N 1 6 p 11 1 1 1 1 1 I I 1 I I C o r L 1 1 1 1 1 1 1 1 1 1 1 1 1 4 1 M, cni m, coil ATTACHMENT B WATER AND SEWER DESIGN CALCULATIONS 385 BROADWAY APARTMENTS SARATOGA SPRINGS, NEW YORK CALCULATIONS FOR WATER SUPPLY DEMAND DETERMINE DAILY AVERAGE AND PEAK HOURLY DEMAND ESTIMATE MAXIMUM DAILY DEMAND: RESIDENTIAL: NO. OF BEDROOMS 84 EA DESIGN FLOW = 110 GPD/EA (NYSDEC)* Qa = 9r240 GPD COMMERCIAL/RETAIL: BUILDING AREA 12,000 SF DESIGN FLOW = 0.1 GPD/SF (NYSDEC)* Qb = 1,200 GPD MAX. DAILY DEMAND, Q = 10 , 4 4 0 GPD (Qa + Qb) AVG. DAILY DAMAND, Qav = 9.7 GPM (18 HRS) MAX. DAILY DAMAND, Qmax = 19 GPM (TWICE THE AVG.) POPULATION 140 EA (10 -STATE SIDS. PAGE PEAKING FACTOR, Qp/Qav 4.20 10-5, FIG. 1, BASED ON 75 GPD/PERSON) PEAK HOURLY DEMAND, Qp = 40.7 GPM ( 4.20 x AVG ) NYSDEC 2014 STANDARDS TABLE B-3 "Typical Per -Unit Loading Rates" DETERMINE INSTANTANEOUS DEMAND: COMMERCIAL/RETAIL: BUILDING AREA 12,000 SF DESIGN FLOW = 0.6 GPM/100 SF (AMEEN TABLE XV)** Qa = 72 GPM RESIDENDIAL: NO. OF RESIDENCES 72 EA INSTANTANEOUS DEMAND = 2.5 GPM/RESIDENCE*** Qb = 180 GPM TOTAL INSTANTANEOUS 252 GPM (Qa + Qb) ** AMEEN TABLE XV "Instantaneous Water Demands for Commercial Areas" (AVERAGE OF SUPER MARKET (1.0) AND OFFICE BUILDING (0.2 GPM/100 SF)) *** AMEEN TABLE XIV "Instantaneous Water Demands for Residential Areas" 1 ATTACHMENT B 385 BROADWAY APARTMENTS SARATOGA SPRINGS, NEW YORK CALCULATIONS FOR SANITARY SEWAGE CAPACITY DETERMINE DAILY AVERAGE AND PEAK HOURLY FLOWS ESTIMATE MAXIMUM DAILY USAGE: RESIDENTIAL: NO. OF BEDROOMS 84 EA DESIGN FLOW = 110 GPD/EA (NYSDEC) Qa = 9f 240 GPD COMMERCIAL/RETAIL: BUILDING AREA 12,000 SF DESIGN FLOW = 0.1 GPD/SF (NYSDEC) Qb = 1,200 GPD MAX. DAILY FLOW, Q = 10f 440 GPD (Qa + Qb ) AVG. DAILY FLOW, Qav = 9.7 GPM ( 18 HOURS ) POPULATION 140 EA (10 -STATE SIDS. PAGE PEAKING FACTOR, Qp/Qav 4.20 10-5, FIG. 1, BASED ON 75 GPD/PERSON) PEAK HOURLY FLOW, Qp = 40.7 GPM ( 4.20 x AVG ) 1 ATTACHMENT B 385 BROADWAY APARTMENTS SARATOGA SPRINGS, NEW YORK PEAK FLOW ESTIMATE BY DRAINAGE FIXTURE UNIT (DFU) COUNT: DETERMINE DFU'S PER TYPICAL UNIT: QTY DESCRIPTION (EACH) DFU TYPICAL MICRO OR 1 BR UNIT W/ 1 BATH: 1 CLOTHES WASHER 2 2 1 KITCHEN SINK 2 2 1 DISHWASHER 3 3 1 LAVATORY 1 1 1 SHOWER 2 2 1 WATER CLOSET 3 3 TOTAL 13 TYPICAL 2 BR UNIT W/ 2 BATHS: 1 CLOTHES WASHER 2 2 1 KITCHEN SINK 2 2 1 DISHWASHER 3 3 2 LAVATORY 1 2 2 SHOWER 2 4 2 WATER CLOSET 3 6 TOTAL 19 TYPICAL 2 BR UNIT W/ 2.5 BATHS: 1 CLOTHES WASHER 2 2 1 KITCHEN SINK 2 2 1 DISHWASHER 3 3 3 LAVATORY 1 3 2 SHOWER 2 4 3 WATER CLOSET 3 9 TOTAL 23 RETAIL SPACE: 1 SERVICE SINK 2 2 1 KITCHEN SINK 2 2 2 LAVATORY 1 2 2 WATER CLOSET 3 6 TOTAL 12 2 ATTACHMENT B 385 BROADWAY APARTMENTS SARATOGA SPRINGS, NEW YORK DETERMINE DFU COUNT FOR ENTIRE BUILDING: QTY DESCRIPTION (EACH) DFU MICRO UNITS: 26 MICRO UNITS 13 338 ONE -BEDROOM UNITS: 34 1 BR UNITS 13 442 TWO -BEDROOMS W/ 2 BATHS: 1 2 BR UNITS 19 19 TWO -BEDROOMS W/ 2.5 BATHS: 11 2 BR UNITS 23 253 COMMERCIAL SPACE: 1 RETAIL 12 12 TOTAL 1, 0 7 6 SAY 1, 100 DFU PEAK HOURLY FLOW = 40.7 GPM (4.2 x AVERAGE) ALT. PEAK FLOW = 210 GPM**(ESTIMATED FOR 1,100 DFU) * DRAINAGE FIXTURE UNITS FROM NYS BLDG. CODE TABLE 709.1 ** APPROXIMATE FLOW BASED ON HUNTER'S CURVE. 3 ATTACHMENT B