2018.12.06 DRE Memo
North Ridge Street
0259 North Ridge Street
259 North Ridge Street Proposed Development
02 Comments on Revised Project Submission (2018)
2018.12.06 DRE Memo
8/5/2019 11:39:28 AM
8/5/2019 11:39:27 AM
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Dolph Rotfeld <br />Engineering, P.C. <br /> <br /> 1 <br />TO: Christopher Bradbury <br /> Village Administrator <br />FROM: Dolph Rotfeld, P.E., BCEE <br />DATE: December 6, 2018 <br />SUBJECT: North Ridge Street Residential Development <br /> Subdivision and Site Plan Application <br /> <br />With regard to the above mentioned project, this office has received and reviewed the following: <br /> <br />1. Memo prepared by Ralph G. Mastromonaco, P.E., P.C., dated November 27, 2018; <br />2. Stormwater Report prepared by Ralph G. Mastromonaco, P.E., P.C., dated April 12, 2018; <br />3. Plans prepared by Ralph G. Mastromonaco, P.E., P.C., dated April 10, 2018, revised September <br />27, 2018. <br /> <br />As per the Village of Rye Brook Zoning Code, Chapter 209, “Site Plan Review”, and in review of the <br />materials listed above please see below for issue(s) that will need further response. <br /> <br />1. This office is of the opinion that the disturbance area will likely exceed the 1 acre threshold, <br />requiring coverage under the NYSDEC General Permit for Stormwater discharges. This is evident <br />by the grading plan and silt fence placement line. <br />2. Percolation tests must be performed to support the infiltration rates used in the stormwater <br />model. The tests must be done in conformance with “Stormwater Management, Westchester <br />County, NY, Best Management Practices Manual Series”, or other accepted method. <br />Notification must be made to the Village Building Department or this office for inspection. Test <br />logs must be submitted for review demonstrating conformance with methodology used (24 hour <br />soak, uniform percolation rates, proper depth). The locations of the percolation tests must be <br />shown on the plan. Per Westchester County BMP, percolation tests must be performed at a <br />depth of 6” below the bottom of each proposed infiltration practice. Percolation tests must be <br />performed even if no percolation volume is considered. <br />3. Wherever infiltration practices are proposed test pits must be performed to confirm soil type <br />and to determine the elevation of ledge rock and groundwater conditions (minimum 2 feet <br />below infiltration practices). Test pit locations must be shown on the plan. If the minimum 2 <br />foot separation is not possible, alternative methods to infiltration must be considered. <br />Notification must be made to the Village Building Department or this office for inspection.
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