2021-04-26-CONCOM-min - Laserfiche WebLink

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Request for Determination of Applicability: 500 Shire Way Applicant: Takeda Pharmaceutical, Co. Ltd. Property Owner: Shire Human Genetic Therapies Inc. Project: repave the parking lot and associated roadways. The majority of the lot will pulverize the existing asphalt in-place and the new pavement will be placed over it. The paving closer to the building will be removed and replaced. The project will also include other elements to capture stormwater flow and treat the runoff. New perimeter and interior curbing will be installed as well as new site lighting poles. Previous Meeting Date: 4/12/2021 Supplemental Documentation: — Letter; From: John Hart, PE, SMMA, To: Lexington Conservation Commission; RE: Takeda-Parking Lot Improvements; Date: 4/20/2021; — Plans: C-101 "Existing Conditions Plan", C-111 "Site Preparation Plan", C-121 "Layout and Materials Plan", C-141 "Grading and Drainage Plan", and C-501 "Details I"; Prepared for: Takeda; Prepared by: Symmes Maini and McKee Associates (SMMA); Stamped and signed by: John C. Hart, PE Civil No. 36738; Date: 3/23/21; Revised: 4/20/2021; — Water Quality Units Sizing Calculations; Prepared for: Takeda, 500 Shire Way; Prepared by: SMMA; Date: 4/16/2021; — Letter; From: Jamie O'Connell, Cambridge Water Department, To: Lexington Conservation Commission; RE: Request for Determination of Applicability by Takeda for Parking Lot Repaving and Stormwater Management Improvements at 500 Shire Way; Date: 4/21/2021; John Hart, Project Engineer with SMMA, presented before the Commission. Mr. Hart responded to comments made by the Commission at the previous meeting, including the removal of 5 parking spots in the northeast corner of the lot to reduce impervious cover near wetlands, and the addition of"no snow storage" signs in areas of the parking lot. The applicant and the Conservation Commission both received a letter from Ms. Jamie O'Connell at the Cambridge Water Department requesting that Takeda use an 80% sand/20% salt mix for the winter deicing efforts to help reduce the chloride load that has impacted the Hobbs Brook Watershed. Mr. Hart stated that Takeda currently uses a 20 sand/80 ice mixture and will research to use more sand than ice in their mixtures; however, he couldn't provide an exact number during the meeting. Mr. Hart added that Takeda does sweep the parking lots twice a year in April and October, and that they could add another sweep around the month of February. Mr. Bitsko commented that the applicant should reach out to other commercial sites in the area and ask what is being done on those sites to satisfy the Cambridge Water Department. On a motion by Mr. Langseth and seconded by Mr. Beuttell, the Commission voted 7-0 by roll call vote to issue a Negative Determination with conditions. Record of vote as follows: