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Phil Hamilton—Aye 7:44 PM Notice of Intent: 18 Peacock Farm Road ViewPoint Cloud Permit# CNOI-21-16, DEP4201-1222 Applicant/Property Owner: David Hsu Project: Construction of detached garage, relocation of driveway and lawn, invasive removal, naturalization of wetland buffer, native plantings Documentation Submitted.- - ubmitted:— Site Plan, 18 Peacock Farm Road, Prepared for: David Hsu; Prepared, stamped and signed by: Frederick W. Russell, PE Civil No. 36713; Date: 2/22/2021; — Photographs of site; Not dated; — WPA Form 3 Notice oflntent application; Prepared for: David Hsu; Prepared by: David Sperduto, Wetlands Identification; Date signed by David Hsu: 4/11/2021; Date signed by David Sperduto: 4/19/2021; — Stormwater Analysis, 18 Peacock Farm Road, Prepared, stamped and signed by: Frederick W. Russell, PE Civil No. 36713; Date: 2/25/2021; — National Flood Hazard Layer FIRMette; Provided by: FEMA; Date prepared: 11/3/2020; — Project Narrative; Locus: 18 Peacock Farm Road, Lexington, MA; Prepared by: David Sperduto, Wetlands Identification; Date: 4/18/2021; — Riverfront Alternatives Analysis; Locus: 18 Peacock Farm Road, Lexington, MA; Prepared by: David Sperduto, Wetlands Identification; Date: 4/7/2021; — Plantings Plan; Prepared by: Wetlands Delineation; Stamped and signed by: David Sperduto, PLS No. 38719; Date: 3/27/2021; Revised "Limit of Work, Disturbance Areas, Breezeway": 5/3/21; — Delineation field notes; Prepared by: David Sperduto; Date: 1/29/2019; Mr. David Sperduto, representative with Wetlands Identification presented before the Commission. The applicant is proposing Feno markers along the 25-foot buffer zone and to naturalize the existing lawn within the 25-foot zone. The applicant is also proposing to remove areas of invasive species and naturalize said areas with a native seed wildflower mix to mitigate an area requested to be considered lawn. Comments and Questions from the Commission: — Did the engineer call out the area of the breezeway as impervious surface? Reponses from the Representative: — There is a decrease in volume of runoff from pre-development to post-development and the breezeway area is about 60 cubic feet. This proposal would still be providing an improvement whether or not the breezeway was accounted for in predevelopment. Fred Russell modeled permeable pavers as impervious for the purpose of the stormwater analysis. On a motion by Mr. Langseth and seconded by Mr. Langseth, the Commission voted 6-0 by roll call vote to close the hearing. 5