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HomeMy WebLinkAbout2007-06-26 CONCOM-min MINUTES —LEXINGTON CONSERVATION COMMMISSION June 26, 2007 Commissioners present: Joyce Miller, Dave Langseth, Duke Bitsko, Stew Kennedy, Dick Wolk, Angela Frick Absent: Phil Hamilton Others present: Karen Mullins, Administrator, Adam Bossi, Assistant Administrator, and Louise Vinci, Department Clerk Joyce Miller, Chair, opened the meeting at 7:35p.m. in room G -15, Town Office Building. 7:35 p.m. Meeting: RDA, Pleasant Street, Present for the applicant /owners: Brett Mason, Oxbow Associates Mr. Mason presented a plan to reinstall about 1,000 ft. of 4 -inch gas conduit along the southern side of Pleasant Street. David Langseth had concerns that sediment could erode into catch basins. Mr. Mason responded by stating that no soil would be stock piled overnight. Administrator Mullins suggested erosion controls in catch basins near area of work, and demarcation of staging areas during pre - construction meeting. Motion made and seconded for negative determination with standard conditions and conditions as identified during the meeting, 6 -0 in favor. 7:45 p.m. Meeting: RDA, Grandview Avenue, Present for the applicant /owner: Mary Trudeau, Wetland Consultant, David Remero, Commonwealth Engineering, David Burns, applicant /owner Ms. Trudeau presented a plan for the construction of three single- family dwellings and connection of the drainage to municipal storm water drainage system. Comments from commissioners: David Langseth asked if the new street catch basins would drain into infiltrator system. When Ms. Trudeau said that they did, Mr. Langseth commented that the plan needed details with elevations showing how the overflow from the new infiltrator system connected to the existing municipal system. Condition to include in permit: revise and submit plan with details of overflow connections. Duke Bitsko asked if all the infiltrator systems would have inspection and maintenance ports. Conditions to include in permit: 1. Provide at least two inspection ports with risers and covers to grade in each system and 2. Maintain annual inspection and maintenance logs and submit evidence of maintenance to the Conservation Office on an annual basis. Stew Kennedy asked about grading to prevent runoff from impervious surfaces flowing to adjacent properties. David Burns responded by stating that the special permit, Page 1 of 5 MINUTES — LEXINGTON CONSERVATION COMMMISSION MEETING June 26, 2007 requires limited clearing of land. He also identified a leaching trench that would be installed up gradient of the property line of the abutting neighbors to intercept any surface flows that may discharge to this area. Motion made and seconded to issue negative determination with standard erosion and drainage conditions as well as inclusion of the three additional conditions identified during the meeting, 6 -0 in favor. 8:00 P.M. Meeting: RDA, 27 Slocum Road, Present for the applicant /owner: Richard Kirby, LEC Environmental Consultants, Tim Lee, Tim Lee Architecture Richard Kirby presented a plan that includes the construction of three stone patios, stone walkways, the removal of several trees and the relocation of other plants. Ms. Miller read a report submitted by Mike Flamang, Lexington Town Engineer, into record. Comments from the commissioners: David Langseth asked if any drainage calculations were provided. He also asked the total amount of impervious surface proposed. Mr. Kirby responded that drainage calculations had not been provided and that 1,800 sf of impervious surface was proposed. Mr. Langseth questioned if a NOI filing would be needed. Joyce Miller expressed concern about the effect of removing so many large trees would have on the water table. Mr. Kirby said that new trees with at least a 2" caliber would be planted. Mr. Bitsko was also concerned about the amount of impervious surface proposed and the fact that no drainage calculations were provided. The commissioners discussed whether there was a need for a NOI filing, and determined a RDA filing would be appropriate as long as drainage calculations supporting the proposal were provided. Motion made and seconded to continue the meeting at the request of the applicant's representative to July 10, 2007 in order to submit drainage calculations. 8:20 p.m. Cont. Meeting: RDA, 710 Marrett Road, Present for the applicant: Ken Leach, Environmental Engineer, District 4, Andrea Nortin, Wetland Division, Mass Highway Administrator Mullins updated the commission about additional information that was provided to show the project requirements by Department of Environmental Protection. Mr. Kennedy outlined discussion held during the site visit regarding the fact that amount and limits of removal would depend on how much waste needed to be removed. Mr. Wolk asked if the project would be contracted out and was concerned by Mass. Highways history of letting contractors not complete projects or comply in a timely manner. Ms. Miller wants a bond, and a preconstruction meeting written into conditions. MINUTES - LEXINGTON CONSERVATION COMMMISSION MEETING June 26, 2007 Motion made and seconded negative determination with standard erosion control and contamination remediation conditions as well as a condition regarding submittal of a performance bond that includes the Lexington Conservation Commission as a party in addition to Mass Highway, 6 -0 in favor. 8:30 p.m. Hearin: NOI, 201 Bedford Street, Present for the applicant: Nicholas Wildman, The Bioengineering Group Steve Doucelle, Project Engineer Jeff Alberti, Weston and Sampson Duke Bitsko identified for the record that he is special employee for the town with regards to him being a consultant for the DPW facility and being a member of the Conservation Commission, and thus, he is recusing himself from participation in the hearing. After this statement, Mr. Bitsko left the room. Nick Wildman presented the plan for a new DPW building. During his presentation he identified the resource areas and identified the goals of the project. Mr. Wildman addressed the many aspects of the project comparing the existing to proposed conditions. Some of the aspects covered included the following: • Impervious surface reduced by 30,000 sf., including a 25,000 sf reduction within the 100' riparian zone. • Stormwater management measures which meet Wetland Protection Act requirements for rate and quality, and town requirements for quality and peak but not volume. • Rooftop stormwater runoff management including bioretention basins, a greenroof, and subsurface holding tank and reuse system. • Parking area stormwater runoff management including porous pavement, created wetlands, and water quality swale. • Salt and sand stormwater treatment. • Bank and Buffer zone maintenance and enhancement. • Snow management plan for operation and maintenance of the proposed systems. • Stormwater systems maintenance. • Lighting plan to reduce light impact off site. Comments from commission: David Langseth complimented the designers for their great efforts. Mr. Langseth had two questions regarding the drainage which he identified for the record and were emailed and received by the design team prior to the meeting. Steve Doucelle responded to Mr. Langseth's questions. 1. The proposal slows the peak rate to the Bedford Street pipe- reduced hydrograph. Mr. Langseth in turn asked what drains to Bedford Street under present conditions, and said he would like a comparison of existing drainage plan and proposed drainage plan, with rough calculations (not a detailed survey) between current and proposed. 2. The proposal treats higher pollutant loads from the Gas MINUTES - LEXINGTON CONSERVATION COMMMISSION MEETING June 26, 2007 area, wash area, and salt and sand storage area as required by the stormwater management standards. Mr. Langseth responded that this does not answer his question as his question related to sizing of the treatment systems that receive runoff from the high pollutant load areas to achieve the required 1 -inch treatment requirement. He wants to review details of each section, and not just numbers for the overall area. A basin by basin removal chart for the 3 area is needed. Ms. Frick asked for a definition of the term "green building ", and said she would like to see rainwater on the site reused. Janet Slanentce, the project architect, responded by saying rainwater was being reused on the site for DPW activities such as in wash bays. Ms. Frick asked what measure would be taken to prevent salt from being washed into the resource areas. Ms. Slanentce answered that the salt shed would be covered and moved farther away from resource area, and two settling forebays would be constructed to slow down and treat storm water runoff Stew Kennedy asked how they planned to eradicate Japanese Knotweed. Nick Wildman replied that it would be removed by hand, and the area would be heavily seeded. Mr. Kennedy also asked if the DPW would be connected to the Minuteman Bikeway. Mr. Wildman said that it would, and Phil Ponelli, Chair Permanent Building Committee (PBC), commented that bathrooms would be available for public use. Dick Wolk asked if consultants would be available throughout the project to ensure that project would be designed as proposed. Mr. Wildman answered that all the project design consultants are under contract throughout the project. Condition of Order: Bioengineering Group must monitor project to completion. Joyce Miller read letter submitted by M. R. Goodrich, an abutter to the project, outlining his concerns with contamination. Mr. Alberti responded that testing had been done and reported to the Department of Environmental Protection, and it had been determined that there was no risk. Mr. Goodrich asked if the expectations were that contamination levels were not as significant as once perceived. Mr. Alberti replied that yes, but that measures were in place for the contractor to notify the Licensed Site Professional (LSP) if something were to be discovered during the project. Mr. Goodrich stated he was pleased with the follow up provided this evening and satisfied with the consultant's responses. Motion was made and seconded to close the hearing, 5 -0 in favor. (Mr. Bitsko recused himself from the hearing and was not present in the room.) 9:28p.m. Cont. Hearin: NOI, 177 Grove Street, Rayvon Realty Trust, 3 -lot cluster development (201 -705, BL 662) Motion made and seconded to continue the hearing to July 10, 2007 at applicant's representative's request, 6 -0 in favor. 9:30 p.m. 1075 Waltham Street, Lot I IA Present for the owner /applicant: Ernie Rogers, owner /applicant; Mark Beaudry, Meridian Engineering MINUTES — LEXINGTON CONSERVATION COMMMISSION MEETING June 26, 2007 Applicant's representative presented a revised plan of minor changes to a previously approved plan. Changes included, lighting changes, ATM canopy position shift, plantings, additional HC parking, additional sidewalk, moved infiltrator system, and additional sewer pump station. Comments from the commissioners: Mr. Bitsko would like applicant to consider reevaluating 3 lights along wetlands to prevent /reduce foot - candles to zero within the 25 foot wetland buffer. Motion made and seconded to allow plan change with request to reevaluate the lighting plan, 6 -0 in favor. 9:50 p.m. Issue Order of Conditions, 9 Village Circle, reviewed draft and added condition: Submit roof detail showing slopes and downspout connections. Motion made and seconded to issue Order as drafted and revised, 6 -0 in favor. 9:55 p.m. Issue Certificate of Compliance, 69 Hancock Street, Motion made and seconded to issue Full Certificate of Compliance with listing of on -going conditions, 6 -0 in favor. 10:00 P.M. Mr. Wolk and Ms. Miller highlighted events from June 21 meeting with Community Preservation Committee and Planning Board. Mr. Wolk submitted e- mail from Aaron Henry and his response. 10:10 P.M. Issue Order of Conditions, 4 Maguire Road, Motion made and seconded to issue Order of Conditions as drafted, 6 -0 in favor. Goals: The Commission discussed potential goals that they would like to accomplish over the next couple of years to forward to the Board of Selectmen in preparation of their goal setting session. The Commission adopted the following three goals as key areas to focus on: • Trail maintenance and construction. • Complete comprehensive Land Management Plan. • Develop stream management program. 10:30 p.m. Motion to adjourn. Respectfully submitted by, Louise Vinci Department Clerk