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Home My WebLink About2021-10-25-CONCOM-min RECEIVED 2021 21 IIDoc,4':33 P. „warn `OVS MOROV, ,n PUBLIC MEETING MINUTES LEMNG1 ON Conservation Commission APNILK- Meering broadcasted by LexMedia LEXIN G't O� AGENDA Monday, October 25, 2021, 6:30 p.m. This Conservation Commission meeting was held remotely via Zoom, an online meeting platform. Public Participation via calling in or using your computer was encouraged. Commissioners Present: Kevin Beuttell, Duke Bitsko, Alex Dohan, Philip Hamilton, Ruth Ladd and Holly Samuels (not present: David Langseth) Associate Members Present: Vinita Bose and Jason Hnatko Staff Present: Karen Mullins, Conservation Director 6:30 PM New Business/Pendine Matters 475 Bedford Street—informal discussion on conceptual plan for new development Mr. Ed Nardi, Cresset Lexington LLC, Ms. Laura Laich, VHB, and Mr. Dale Horsman, VHB, continued the discussion on a conceptual design for a laboratory building and associated parking structure at 475 Bedford Street. Ms. Laich provided an overview on existing wetland conditions at the site and the proposed wetland replication areas, and requested feedback from the Commission on the potential for rain gardens as an option for wetland replication. Mr. Horsman identified a few potential areas for stormwater management, emphasizing multiple utility easement constraints and shallow groundwater on site. Members of the Commission provided feedback on the wetland replication, asking if the consultant could promote an herbaceous wetland replication in the easement area, given the large easements and vegetative maintenance/cutting performed by Eversource on a yearly basis. A concern was raised about the steep slope and retaining wall in the proposed loading zone area, and the tight turn for large vehicles. Feedback from the Commission was also provided on the retaining wall adjacent to wetland replication areas and that it may eliminate burrowing habitat for certain species on the slopes. Certificate of Compliance: Between Marrett Rd Substation and 443 Lincoln St(Eversource Conduit Installation), ViewPoint Cloud Permit# COC-21-23, DEP4201-1110, BL 1068 This will be continued to the next meeting. Conservation staff are coordinating a compliance site visit. Certificate of Compliance: 96 Lowell Street, ViewPoint Cloud Permit# COC-21-29, DEP4201- 1146, BL 1103 Ms. Mullins stated that the applicant provided an invoice dated 10/25/2021 for the purchase of two `October Glory' Swamp Red Maples. Per the Order of Conditions, the applicant is required to plant only a native variety and what was purchased is a cultivar. This will be continued to a future hearing. Certificate of Compliance: 7 Lois Lane, ViewPoint Cloud Permit#COC-20-14, DEP4201-1152, BL 1152 This will be continued to the next meeting. New Public Meetings/Hearings Request for Determination of Applicability: 99 Hancock Street(Diamond Middle School) ViewPoint Cloud Permit# CDOA-21-13 Applicant/Property Owner: Town of Lexington Project: installation of new concrete pad and natural gas generator, main circuit breaker and CB cubicle switchboard. Impervious area increase of 198 square feet. All proposed work is outside of the 100 Foot Wetland Buffer Zone Documentation Submitted.- - ubmitted:— Sheet 1.3.01 "Site Layout& Grading Plan and Sitework Details" and Sheet 10.1.01 "Site Electrical Plan"; Prepared by: DiNisco Design; Stamped and signed by: Fredric W. King, PE Civil No. 38089; Date: 9/24/2021; — Project Description; From: Kevin Riopelle, DGT Associates; To: Lexington Conservation Commission; RE: Diamond Middle School Emergency Generator Project at 99 Hancock Street; Date: 9/24/2021; — WPA Form 1 Request for Determination of Applicability application; Prepared by: Kevin Riopelle, DGT Associates; Prepared for: Michael Cronin, Town of Lexington; Date signed by applicant: 9/24/2021; Date signed by representative: 9/28/2021; Mr. Kevin Riopelle, civil engineer, on behalf of Lexington Facilities,presented to the Commission. The applicant is proposing to remove the existing generator and generator pad on site and replace with a new concrete pad and generator, 257 feet away from wetlands to the southeast. Mr. Riopelle stated that the runoff will be collected in an existing catch basin to the north and discharged to wetlands 680 feet to the north. He added that there will be no adverse impact to the stormwater management system. It was noted that the volume calculation for the 1 year storm event exceeds existing conditions. Mr. Riopelle responded that the volume calculation for the 1 year storm event is about a .001 (acre foot) increase or about 44 cubic feet. This volume is not in compliance with the original permit. Mr. Riopelle added that the existing subcatchment is a mostly wooded area and almost no runoff is generated from this wooded area. The Commission agreed that they would like the applicant to rerun the calculations for the purpose of consistency. On a motion by Ms. Ladd and seconded by Mr. Beuttell, the Commission voted 6-0 by roll call vote to continue the hearing to the November 22, 2021 meeting at the applicant's request. Record of vote as follows: Kevin Beuttell —Aye Duke Bitsko—Aye Alex Dohan—Aye Ruth Ladd—Aye Holly Samuels —Aye Phil Hamilton—Aye 44:14 LexMedia Recording Request for Determination of Applicability: 0 Grove Street ViewPoint Cloud Permit# CDOA-21-14 Applicant: Greenways Corridor Committee Property Owner: Town of Lexington Project: construction of a natural surface trail within the 100-foot Buffer Zone to Bordering Vegetated Wetlands on property owned by the Conservation Commission Documentation Submitted — Project Description; Prepared by: Sullivan Engineering Group, LLC; Not dated; — WPA Form 1 Request for Determination of Applicability application; Prepared by: Jack Sullivan, Sullivan Engineering Group, LLC; Prepared for: Keith Ohmart, Greenway Corridor Committee; Date signed by applicant and representative: 10/1/2021; — Existing Conditions Plan of Land; Prepared for: Town of Lexington; Prepared by: Sullivan Engineering Group, LLC; Stamped and signed by: John D. Sullivan III, PE Civil No. 41586; Date: 9/27/2021; — Plot Plan of Land; Prepared for: Town of Lexington; Prepared by: Sullivan Engineering Group, LLC; Stamped and signed by: John D. Sullivan III, PE; Date: 10/13/2021; Mr. Jack Sullivan, Sullivan Engineering Group,presented to the Commission on behalf of the Greenways Corridor Committee. The Commission raised concern about erosion and sediment entering the stream since the proposal involves removing organic matter and depositing downslope of the path. It was also asked if more material was needed, where would it be mined from, and how much would be needed. Mr. Mike Tabaczynski, Greenways Corridor Committee, responded that volunteers will take native mulch, twigs and leaves to cover the area surrounding the new trail and will put seeds down to reseed any disturbed areas. Mr. Tabaczynski added that he doesn't anticipate needing to mine soil from elsewhere, but if so will take from uphill of the wetlands, and only expect a couple wheelbarrows of fill, if any at all, since only building about 300 feet of new trail. Mr. Nikhil Dighe, 31 Jefferson Drive, asked for clarification on parking and what implications this connected trail may have on Jefferson Drive. Mr. Sullivan responded stating that the trail easement was created through the Planning Department and available for public use, and that Mr. Dighe's question would be best answered by the Planning Department. Mr. Hamilton added that there will be some parking available at Wright Farm and that will connect to this trail. That may help to alleviate some traffic and parking on Jefferson Drive. Mr. Metin Celebi, 19 Jefferson Drive, asked if the closing of the existing trail will be timed with the completion of this project. Mr. Tabaczynski responded that the existing trail will be closed in sync with the construction of the new trail. The project should be completed in one day with 20- 25 volunteers and a sign will be installed regarding the new trail and new configuration. On a motion by Ms. Ladd and seconded by Ms. Samuels, the Commission voted 5-0 by roll call vote to issue a Negative Determination with conditions. Record of vote as follows: Kevin Beuttell —Aye Duke Bitsko—Aye Alex Dohan—Recused Ruth Ladd—Aye Holly Samuels —Aye Phil Hamilton—Aye Request for Determination of Applicability: 8 Tricorne Road ViewPoint Cloud Permit# CDOA-21-15 Applicant/Property Owner: Toby Freyman Project: replacing posts for a deck that is attached to a single family house. Work is located—60 linear feet from an intermittent stream bank. Documentation Submitted: — WPA Form 1 Request for Determination of Applicability application; Prepared by: Mitch Maslanka, Goddard Consulting LLC; Prepared for the applicant: Toby Freyman; Date signed by representative and applicant: 10/4/2021; — Project Description; From: Mitch Maslanka, Wetland Scientist; To: Lexington Conservation Commission; Re: Request for Determination of Applicability; Date: 10/5/2021; — Orthophoto View of Site; GIS Data Source: Office of Geographic Information (Mass GIS); Date: 10/4/2021; Mr. Mark Arnold, Goddard Consulting,presented to the Commission. The applicant is proposing to demolish the existing rear deck and reconstruct the stairs. The proposed deck will extend an additional two feet off of the house to create a 10 foot wide deck. Mr. Arnold stated that all the proposed work is to remain above the existing impervious patio. The Commission did not have any questions. On a motion by Mr. Beuttell and seconded by Ms. Samuels, the Commission voted 6-0 by roll call vote to issue a Negative Determination with conditions. Record of vote as follows: Kevin Beuttell —Aye Duke Bitsko—Aye Alex Dohan—Aye Ruth Ladd—Aye Holly Samuels —Aye Phil Hamilton—Aye Request for Determination of Applicability: 26 Brookside Avenue ViewPoint Cloud Permit# CDOA-21-16 Applicant/Property Owner: David E. Novelline Project: National Grid to install new gas line service to the right side of the house. Wetlands and conservation area across Brookside Avenue Documentation Submitted.- - ubmitted:— WPA Form 1 Request for Determination of Applicability application; Prepared by: David Novelline,property owner; Date signed: 10/5/2021; — National Grid application "Residential Gas Service Agreement-2021"; Date signed by property owner: 9/8/2021; — New gas service plan: Not dated; — MapGEO,provided by Town of Lexington, MA; Date: 10/5/2021; Mr. David Novelline,property owner,presented to the Commission. Mr. Novelline presented on behalf of National Grid, who will be installing the new gas line service. The Commission will add a Condition that erosion control be put in place if the work is to take more than one day to complete. On a motion by Mr. Beuttell and seconded by Ms. Dohan, the Commission voted 6-0 by roll call vote to issue a Negative Determination with conditions. Record of vote as follows: Kevin Beuttell —Aye Duke Bitsko—Aye Alex Dohan—Aye Ruth Ladd—Aye Holly Samuels —Aye Phil Hamilton—Aye Continued Public Meetinufflearin2s Notice of Intent: 440 Bedford Street ViewPoint Cloud Permit# CN0I-21-37, DEP#201-1243 Applicant: Elisha Long, Trammell Crow Company Property Owner: Ashok Patel, Ayushi LLC Project: proposed life science lab building with associated parking structure within the 100-foot Buffer Zone to Bordering Vegetated Wetlands, 200-foot Riverfront Area, and Bordering Land Subject to Flooding Previous Meeting Date: 9/27/2021 *The applicant has requested a continuance to the November 22, 2021 meeting Ms. Mullins informed the Commission that she has been reaching out to consultants to perform a peer review of the floodplain and stormwater management. A consultant has not yet been confirmed. On a motion by Ms. Ladd and seconded by Ms. Samuels, the Commission voted 6-0 by roll call vote to continue the hearing to the November 22, 2021 meeting at the applicant's request. Record of vote as follows: Kevin Beuttell —Aye Duke Bitsko—Aye Alex Dohan—Aye Ruth Ladd—Aye Holly Samuels —Aye Phil Hamilton—Aye Notice of Intent: 39 Ledgelawn Avenue ViewPoint Cloud Permit# CN0I-21-41, DEP#201-1244 Applicant/Property Owner: Richard A. Jensen Project: Addition of a 226 square foot roof over an existing wooden deck and a 113± square foot alteration to the existing infiltration system. Proposed work is within the 100-foot buffer zone to Bordering Vegetated Wetlands and 200-foot Riverfront Area. *Request to issue Order of Conditions if hearing is closed. Supplemental Documentation: — Memorandum; From: Marissa Liggiero, Engineering; To: Karen Mullins, Conservation; Subject: 39 Ledgelawn Ave NOI Engineering Comments; Date: 10/14/20121; — Stormwater Analysis and Calculations; Prepared by: Meridian Associates, Inc.; Stamped and signed by: Christopher S. Broyles, PE Civil No. 51591; Date: 9/14/2021 and revised through 10/15/2021; The applicant has received a favorable engineering review and the Commission had no questions. On a motion by Ms. Samuels and seconded by Ms. Ladd, the Commission voted 6-0 by roll call vote to close the hearing. Record of vote as follows: Kevin Beuttell —Aye Duke Bitsko—Aye Alex Dohan—Aye Ruth Ladd—Aye Holly Samuels —Aye Phil Hamilton—Aye On a motion by Ms. Ladd and seconded by Ms. Dohan, the Commission voted 6-0 by roll call vote to issue the Order of Conditions. Record of vote as follows: Kevin Beuttell —Aye Duke Bitsko—Aye Alex Dohan—Aye Ruth Ladd—Aye Holly Samuels —Aye Phil Hamilton—Aye New Business/Pendine Matters, Continued Issue Order of Conditions: 24 Hamblen Street, ViewPoint Cloud Permit# CNOI-21-39, DEP4201-1241 On a motion by Mr. Beuttell and seconded by Ms. Samuels, the Commission voted 6-0 by roll call vote to issue the Order of Conditions. Record of vote as follows: Kevin Beuttell —Aye Duke Bitsko—Aye Alex Dohan—Aye Ruth Ladd—Aye Holly Samuels —Aye Phil Hamilton—Aye Issue Order of Conditions: 180 Burlington Street, ViewPoint Cloud Permit# CNOI-21-38, DEP4201-1242 On a motion by Ms. Dohan and seconded by Ms. Ladd, the Commission voted 6-0 by roll call vote to issue the Order of Conditions. Record of vote as follows: Kevin Beuttell —Aye Duke Bitsko—Aye Alex Dohan—Aye Ruth Ladd—Aye Holly Samuels —Aye Phil Hamilton—Aye Site visits for 11/22/2021 Meeting: Saturday, 11/6/2021 The site visits will take place on November 13, 2021. Approve minutes: 9/13/2021 and 9/27/2021 On a motion by Ms. Dohan and seconded by Ms. Samuels, the Commission voted 6-0 by roll call vote to approve the Minutes of the 9/13/2021 meeting. Record of vote as follows: Kevin Beuttell —Aye Duke Bitsko—Aye Alex Dohan—Aye Ruth Ladd—Aye Holly Samuels —Aye Phil Hamilton—Aye On a motion by Ms. Samuels and seconded by Ms. Ladd, the Commission voted 6-0 by roll call vote to approve the Minutes of the 9/27/2021 meeting. Record of vote as follows: Kevin Beuttell —Aye Duke Bitsko—Aye Alex Dohan—Aye Ruth Ladd—Aye Holly Samuels —Aye Phil Hamilton—Aye Reports: Bike Advisory, Community Gardens, Community Preservation Committee, Greenway Corridor Committee, Land Acquisition, Land Management, Land Steward Directors, and Tree Committee, HIP Working _GroupGroup Ms. Mullins informed the Commission that the Idylwilde Community Garden is switching to no- till plots and that gardeners will need to remove structures for the next year and staff received concern from existing gardeners who were previously allowed to leave structures. Staff agreed to put this change on hold until they have had an opportunity to discuss with current gardeners the first week of December. Mr. Beuttell stated that many applicants seem to be confused about cultivars versus native species and asked if any changes can be made to better explain the requirement to applicants. Ms. Mullins responded that the requirement for a straight-native species is outlined in the Order of Conditions, and the project team is informed during the pre-construction meeting, and that Ms. Mullins stresses the importance of keeping receipts and invoices for planting purchases. On a motion by Mr. Beuttell and seconded by Ms. Samuels, the Commission voted 6-0 by roll call vote to adjourn the meeting. Record of vote as follows: Kevin Beuttell —Aye Duke Bitsko—Aye Alex Dohan—Aye Ruth Ladd—Aye Holly Samuels —Aye Phil Hamilton—Aye Respectfully Submitted, Meghan McNamara Conservation Department Assistant Approved: 12/6/2021 Archived: 12/10/2021