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Chazen Engineering comments THE Cba � North Country Office �� 375 Bay Road, Queensbury, NY 12804 �"�.J" f��''Y ��� P: (518) 812-0513 F: (518) 812-2205 I www.chazencompanies.com Proud to be l:rnT)1 yee Owned Engineers Hudson Valley Office (845)454-3980 Land Surveyors Capital District Office (518) 273-0055 Planners Environmental Professionals Landscape Architects February 07, 2017 Mr. Craig Brown Zoning Administrator and Code Compliance Officer Town of Queensbury 742 Bay Road Queensbury, New York 12804 Delivered via email only: CraigB@gueensbury.net Re: Clute Enterprise-35 Birdsall Way Town of Queensbury, Warren County, New York Chazen Project#91700.06 Queensbury Ref#SP10-2017 Dear Mr. Brown: The Chazen Companies (Chazen) has received a submission package from your office for the above referenced project. The applicant intends to construct a new single family home. Submitted information includes the following: • Site Plan and detail prepared by Hutchins Engineering, dated January 13, 2017; • Architectural plans submitted by Williams &Williams, undated; • Stormwater Management Report, prepared by Hutchins Engineering, dated January 30, 2017; • Short EAF, and; • Town of Queensbury Site Plan Application; Your office has requested that we limit our review to the design of stormwater management and erosion and sediment control items as it relates to compliance to local, state or relevant codes/regulations and general practice. Based upon our review, Chazen offers the following comments for the Town's consideration: Stormwater Management& Erosion and Sediment Control: 1. According to the site plan, the total project disturbance is 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-0-15-002). Comments related to the proposed stormwater management and erosion and sediment control features proposed for the site are offered below: Chazen Engineering, Land Surveying&Landscape Architecture Co., D.P.C. Chazen Environmental Services, Inc. The Chazen Companies, Inc. Town of Queensbury Clute Enterprise-35 Birdsall Way February 07,2017 Page 2 2. The site plans depict rock slope stabilization for the backslope located south of the proposed house. The site plan does not include a detail for the rock slope stabilization. The Applicant shall provide a detail for the rock slope stabilization. The design shall conform to the armored slope specifications of the New York State Standards and Specifications for Erosion and Sediment Control (NYS SSESC). 3. The proposed cut slope located west of the proposed house appears to be at a slope of 2H:1V and has a vertical interval (height) of about 44 feet. The Landgrading specifications of the NYS SSESC states, "Cut and fill slopes that are to be stabilized with grasses shall not be steeper than 2:1. When slopes exceed 2:1, special design and stabilization consideration are required and shall be adequately shown on the plans." "Reverse slope benches or diversion shall be provided whenever the vertical interval (height) of any 2:1 slope exceeds 20 feet,for 3:1 slope it shall be increased to 30 feet and for 4:1 to 40 feet. Benches shall be located to divide the slope face as equally as possible and shall convey water to a stable outlet." The Applicant shall revise the proposed grading west of the house to include benches that are designed in accordance with the Landgrading specifications of the NYS SSESC. Further, the Applicant should consider employing additional erosion controls on the slope during construction (such as silt fence, etc.), due to the steepness and length of the proposed slope. 4. The Applicant to depict the stabilized construction entrance on the plans. 5. It does not appear that soil testing has been performed to confirm adequate vertical separation to seasonal high groundwater. As such, soil testing should be provided to demonstrate separation. Our office does not take exception to soil testing occurring at the commencement of construction (results should be furnished to the Town), as long as the town does not take exception. We note that if adequate separation to groundwater is not available following results of the testing, changes to the plan will be required and may be subject to additional site plan review. 6. It is noted that NYSDOH Appendix 5-13.7, Table 1 states the required minimum separation distances to protect water wells from contamination. The minimum separation to "surface wastewater recharge absorption system constructed to discharge storm water from parking lots, roadways or driveways" is 100 feet. The proposed well is located within 100 feet of the stormwater infiltration device. The Applicant shall revise the design to conform to the DOH standards or coordinate with NYSDOH for a waiver/variance from the requirement. Z:\projects\91700-91799\91700.00-T.Queensbury\91700.06-T.Queensbury-SP10-2017 Clute Enterprise\ENG\REVIEW\91700.06-CluteEnterprise_SP10-2017_2017-02-07_L1.docx Town of Queensbury Clute Enterprise-35 Birdsall Way February 07,2017 Page 3 Conclusions and Recommendations It is our opinion that the applicant should provide clarification for the above items and incorporate the changes in subsequent plan submissions. If you have any questions regarding the above, please do not hesitate to contact me at (518) 824-1926. Sincerely, : ' �n^ Sean M. Doty, P.E., LEED AP, CMS4S Principal Manager, Municipal Engineering Services cc: Sunny Sweet,Town Planning Office Administrator(via email) Laura Moore,Town Land Use Planner(via e-mail) Z:\projects\91700-91799\91700.00-T.Queensbury\91700.06-T.Queensbury-SP10-2017 Clute Enterprise\ENG\REVIEW\91700.06-CluteEnterprise_SP10-2017_2017-02-07_L1.docx