2012-04-03 CONCOM-min - Laserfiche WebLink

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activity on the property from the proposed project and its effect on protection of the wetland. (Mr. Larson responded to comments about the number of trees being removed and explained that his opinion is only three trees of importance are to be removed.) Responses from Commission as follows: Mr. Bitsko commented that this is a modification of existing structures, not a new development, and therefore different criteria apply as far as LID is concerned. Mr. Langseth agreed and explained that the Commission encourages LID practices, but that we hold projects that come before us to specific performance standards. He explained that recharge of groundwater is extensive in this proposal; and he explained that intensity of use is not a standard by which a project is judged by the Commission. Charles Hornig, member of the Planning Board, invited public to attend Planning Board hearing on this project on April 12. Motion made and seconded to close the hearing, 6-0 in favor. 8:30 pm Continued Hearing – NOI, Hayden Avenue, Town of Lexington DPW DEP 201-854, BL 812 Maintenance and improvement of existing public roadway, including narrowing the roadway and constructing a 5-foot wide sidewalk Documentation: NOI application Present for the applicant: Tom Laughlin, BSC Group; Dave Cannon, DPW Engineering As requested at previous meeting, BSC met with property owner of 80 Hayden Ave to look at problems the existing roadway stormwater management is causing at that location. There also was a subsequent meeting at the site between BSC, DPW, Ms. Mullins, and 80 Hayden Ave representative. The applicant believes all the problems at that location will be solved and that no plan change is necessary. Motion made and seconded to close the hearing, 6-0 in favor. 8:45 pm Continued Hearing – NOI, Marrett Road, Old Reservoir, Engineering Department DEP 201-849, BL 807 Water quality improvement Documentation: NOI application Present for the applicant: Bernward Hayes, Louis Berger Group Mr. Hayes first apologized to four abutters who were mistakenly not notified of NOI. He then explained that tonight’s presentation is to give an update on responses to the Commission’s questions and concerns from the last meeting, with detailed design to be presented at our meeting in four weeks. He reported that since the last meeting they met with the Army Corps of Engineers, DEP and DCR at the site and they expect agreement that they will be able to remove sedimentation from the vegetated wetland that was the old detention basin. He reported that they double-checked the stormwater retention calculations for the new proposed bi-filtration basin and found that the design exceeds the DEP requirements – at 107% - so they will be able to reduce the size by 7% and still meet DEP standards. They asked about further reduction of capacity and were discouraged by DEP to make further reductions. This 7% reduction in capacity will