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Home My WebLink About20220104 30 Caroline Site Plan Review 2022-10-28 Engineering Report Engineering Report Water, Sanitary Sewer, and Stormwater For 30 Caroline Street 30 Caroline Street SARATOGA SPRINGS, NEW YORK Planning Board #22.XXX Prepared For: GM 30 Caroline Street Corp. 365 Arlington Avenue Brooklyn, NY 11208 Prepared By: The LA Group, P.C. 40 Long Alley Saratoga Springs, New York 12866 February 8, 2022 Revised: October 28, 2022 I. Project Description The 30 Caroline Street project consist of the construction of a new mixed-use building at 30 Caroline Street, Saratoga Springs, NY 12866. The property is bound by Caroline Street to the north, the west by Hamlet & Ghost, the east by Sperry’s, and the south by The Ice House. The building is anticipated to have (5) one-bedroom apartments, (6) studio apartments and 1,825 sf of commercial space. II. Existing Water, Sanitary Sewer, and Stormwater Utilities Existing Water Utilities Municipal water service is available from the City of Saratoga Springs. A 4-inch diameter water main is located along Caroline Street. Existing Sanitary Sewer Utilities Municipal sanitary sewer service is available from the City of Saratoga Springs. A 21-inch diameter sanitary sewer main runs along Caroline Street. This sanitary line eventually connects to the Saratoga County Sewer District No. 1 (SCSD), where it ultimately is directed for conveyance and treatment at the SCSD wastewater treatment plant in Mechanicville. Existing Stormwater Utilities Existing stormwater infrastructure local to the project consist of two catch basins located on the north and south side of Caroline Street approximately 10’ east of the project area. The existing storm infrastructure is interconnected and directs stormwater flows to a stormwater manhole between the two catch basins. This manhole directs stormwater east along Caroline Street in an 18” pipe. III. Projected Water and Wastewater Flows The table below provides information on the anticipated wastewater flow rates for the project: Description Use Rate Total Use Apartments (11 Bedrooms) 110 gpd/bedroom1 1,210 gpd Office (1,825 sf) 0.1 gpd/sf1 183 gpd Total 1,393 gpd Average daily flow for wastewater is estimated to be 1.0 gallons per minute (gpm) based on a 24-hour day. Estimated peak hourly flow is 4.2 gpm (4.2 x average).2 Average daily demand for water is estimated to be approximately equal to the wastewater flow or 1.0 gpm. For the purposes of input into the City of Saratoga Springs model, we offer the following estimated water demands for the project: - Average Daily Demand is 1.0 gpm over the 24-hour period. - Max Daily Demand is 2.0 gpm based on twice the average. - Peak Hourly Demand is 4.2 gpm based on 4.2 times the average. - Fire Flow Demand is 1,000 gpm based on ISO guidelines. IV. Proposed Water, Wastewater, and Stormwater Utilities Proposed Water Utilities To service the project, a 4” DIP water service is proposed to connect from the new building to the 4” municipal water service in Caroline Street. Connections and appurtenances, including corporation stops, trenching, bedding, service connections, as well as testing and disinfection will all be specified in accordance with City of Saratoga Springs and NYSDOH standards. Proposed Sanitary Sewer Utilities For sanitary sewer collection, a 6” PVC sewer lateral connection from the new building to the municipal sewer service in Caroline Street is proposed. The lateral will be installed at a minimum 2.0% slope per City of Saratoga Springs requirements to ensure adequate pipe cleansing. Proposed Stormwater Utilities The NYSDEC General Permit for Stormwater Discharges from Construction Activity (GP-0-20- 001) requires the preparation of a SWPPP that includes post-construction stormwater management practices for projects that disturb greater than 1 acre of land except for a few specified scenarios. The City or Saratoga Springs requires the preparation of a City SWPPP that includes post-construction stormwater management practices for projects that disturb between 0.1 and 1 acres of land. The 30 Caroline Street project will disturb 0.09 acres of land and is therefore exempt from preparing a SWPPP and stormwater management practices. For stormwater collection a 6” HDPE storm lateral connection from the new building to the municipal storm service in Caroline Street is proposed. The lateral will be installed at a minimum 0.5% slope. Notes 1. From Table 1, Appendix 75-A Wastewater Treatment Standards - Residential Onsite Systems (110 gallons per day per bedroom) 2. From Figure 1, GLUMRB Recommended Standards for Wastewater Facilities Q = (18 + P ½) ÷ (4 + P ½) where P = population in thousands 3. From Tables XIV Community Water Systems Source Book, Ameen (3.0 gpm/residence)