Loading...
2022-08-23 Randles Response LetterENVIRONMENTAL DESIGN ect) PARTNERSHIP, LLP. 900 Route 146 Clifton Park, NY 12065 (P) 518.371.7621 edpllp.com Date: August 22, 2022 To: Mr. Craig Brown Zoning Administrator and Code Compliance Officer Town of Queensbury 742 Bay Road Queensbury, NY 12804 Re: Randles Residence Queensbury Ref #SP51-2022 Dear Mr. Brown: The Environmental Design Partnership, LLP (EDP) is providing you this letter in response to review comments provided by the LaBella dated August 18, 2022. On behalf of the applicant Jeff and Nancy Randles, we offer the following response to comments and additional information: According to the site plan review application, the proposed site improvements will disturb less than one (1) acre and thus the project is not required to obtain coverage under the NYSDEC SPDES General Permit for Stormwater Discharges from Construction Activity (GP-0-20-001). However, this project falls within the Lake George watershed and therefore is subject to the stormwater management requirements set forth in Section 147-11 of the Town Code for projects within the Lake George Park. Comments related to the stormwater management and erosion and sediment control features proposed for the site are offered below. - Response: Comment noted. 2. According to the site plans, this project proposes land disturbance of 10,000 (+/-) square feet and is classified as a minor project for stormwater management by Town Code Section 147-11.E(1)(a). With the minor project classification, the Applicant has opted to use the alternative stormwater calculation method described in Town code section 147-11.1(2)(a), which allows a flat rate of 1.5 gallons of stormwater to be used for every square foot net increase in impervious area, where net increase is the difference between predevelopment and post development conditions. Response: Comment noted. 3. Town code section 147-111(2)(c) states infiltration devices shall not be installed up gradient within 20 feet of the subsurface treatment system of a wastewater treatment system. It is difficult to discern where the project site and neighboring absorption fields are located (as applicable). The Applicant to revise or clarify accordingly to support a review of 147-111(2)(c). Response: Neighboring systems have been added to Sheet 3 of the Site Plans. There are no wastewater treatment systems within 20 feet of any infiltration devices. 4. The callout for stormwater management practice SMA #4 states that it will have a bottom elevation of 332.5 throughout the section. The proposed contours do not match the callout, as the portion of the practice closest to the lake shows an elevation of 332 feet. The Applicant to clarify, and revise the site plans if applicable. Response: SMA#4 has been updated for the bottom of the drip edge to be 331.5 throughout the section. Mr. Craig Brown August 22, 2022 Page 2 ENVIRONMENTAL DESIGN PARTNERSHIP, LLP. :shaping isle physica, eiivii'i3fiiV iei 5. Town code section 147-111(2)(a) states that the location of the infiltration devices shall be determined based upon soil test results. Town code section 147-111(2)(e) prescribes the vertical separation distances for infiltration practices. It does not appear that deep soil test pits nor infiltration tests were performed in support of the design. The Applicant to perform the tests and provide the results. Response: Test pits and infiltration tests have been performed and depict fine loamy sand to depths of 48". Infiltration rates stabilized between 80-96 inches per hour. Refer to Sheet 2 of the Site Plans for results and locations. 6. As applicable, the Applicant to add downspout locations to the site plans. Response: Downspout locations have been added to the site plans as applicable, refer to Sheet 4 of Site Plans for location. 7. Sheet 6 of the site plans has a callout stating the limit of work is 29,000 SF and a limit of disturbance of 11,250 SF. The Applicant to clarify what construction activities will take place within each described boundary. Response: The limit of disturbance is 11,250 SF and by definition, the area of stormwater management devices and sanitary sewer is not included in the area of disturbance calculation. There will be a total of 29,050 SF of work, which includes portions of grading that would not need to take place if stormwater devices were not needed. The 11,250 SF of disturbance includes the necessary grading for the driveway and proposed addition. 8. It does not appear that the grading plans depict the overflow weir elevation for SMA #3 and the Applicant to revise accordingly. Response: Sheet 4 of the Site Plans have been updated to include the overflow weir elevation for SMA#3. 9. The Applicant to clarify the method of pre-treatment prior to entry to the infiltration practice. Response: Pre-treatment for infiltration devices taking driveway runoff includes the grass swale that diverts runoff to the corresponding stormwater management area. Areas taking only roof runoff do not need pre-treatment. 10. It appears the erosion and sediment control plan is incorporated into the overall site plan. It does not appear that the ESC plan is complete as no temporary ESC controls are depicted to protect the infiltration areas. Section 6.3.6 of the NYS SMDM states "Infiltration practices shall never serve as a sediment control device during site construction phase. In addition, the Erosion and Sediment Control plan for the site shall clearly indicate how sediment will be prevented from entering an infiltration facility." The Applicant shall revise the plans to clearly indicate how sediment will be prevented from entering the infiltration facilities during the site construction phase. Response: Refer to Sheet 6 of the Site Plans, two sediment traps have been added to prevent sediment from entering in the two depression areas. 11. Further, it does not appear that a temporary soil stockpile and temporary ESC controls for a temporary soil stockpile are depicted on the site plans. The applicant to clarify if there will be a temporary soil stockpile and revise the plans if applicable. 900 Route 146 Clifton Park, NY 12065 (P) 518.371.7621 edpllp.com Mr. Craig Brown August 22, 2022 Page 3 ENVIRONMENTAL DESIGN PARTNERSHIP, LLP. Shaping the physical environment Response: Refer to Sheet 6 of the Site Plans. A temporary soil stockpile and temporary ESC have been depicted on the site plans. If you have questions or require additional information, please contact our office at your convenience. Very truly yours, The Environmental Design Partnership, LLP Convior DeM yelp Connor DeMyer Project Engineer 900 Route 146 Clifton Park, NY 12065 (P) 518.371.7621 edpllp.com