2022-12-19-ConCom-min - Laserfiche WebLink

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Documentation Submitted: ⎯ Cover Letter and attachments; Prepared by: Debora J. Anderson, Wetland Scientist; Date: 11/29/2022; ⎯ Sheet C-1 “Site Plan”; Prepared by: Quetti Design Group; Stamped and signed by: Kevin A. Quetti, PE; Date: 11/29/2022; ⎯ Proposed Plot Plan; Prepared by: LeBlanc Survey Associates, Inc.; Stamped and signed by: Vernon J. LeBlanc, PLS; Date: 11/22/2022; ⎯ Photographs of Site; Not dated; ⎯ Stormwater Mitigation Report; Prepared by: Quetti Design Group; Stamped and signed by: Kevin A. Quetti, PE Civil No. 55455; Date: 11/29/2022; ⎯ WPA Form 3 Notice of Intent application; Prepared by: Debbie Anderson; Prepared for applicant/property owner: Matthew Andrade; Signed 11/28/2022 and 11/29/2022; Ms. Debbie Anderson, wetlands consultant, and Mr. Kevin Quetti, project engineer, presented to the Commission. Ms. Anderson stated that Munroe Brook is well over 200 feet away from the project area. Prior to the meeting, Ms. Mullins informed the applicant that the stream to the east of the site daylights from the pipe at Lowell Street and was determined to be perennial. Questions and Comments from the Commission: ⎯ Request that the 200-foot Riverfront Area be shown on the plans. ⎯ The town engineering report indicates that the performance standards are not met. ⎯ Why are you not proposing to infiltrate the entire roof area, and only infiltrating the left side of the existing house and the proposed addition? ⎯ A small portion of the proposed addition is within the 50-foot buffer zone and the Commission asks for mitigation beyond the ordinary if building within this buffer zone. Infiltrating the entire existing dwelling could be counted as mitigation that is above and beyond. Responses from the Representatives: ⎯ Infiltrating the entire roof area would be costlier, but will discuss the option with the applicant/property owner. Could connect the downspout from the back roof and connect to the proposed infiltration system. Ms. Katie Reynolds, property owner, asked for clarification on the town engineering comments that state the soil type must be confirmed prior to installation of the infiltration system, and why the Commission requires this information prior to approval of the project. Mr. Hamilton responded that the test pit data is typically performed prior to submission of the Notice of Intent application. Ms. Mullins stated that the Commission requests this information upfront to make an informed decision and ensure the two feet of separation to groundwater is met. Ms. Mullins also stated that if the contractor finds that the drainage system doesn’t comply with the standards and the foundation is already installed, it would be costly and difficult to change the design.