2018-09-17-CONCOM-min - Laserfiche WebLink

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Mr.Man reviewed several comments that were made at the prior meeting.Mr.Man reported changes to the stormwater calculations to comply with the stormwater regulations.They will use a larger system to collect stormwater flow. Mr.Hamilton entered the comments by the Engineering Department into the record. Mr.Man continued to explain that 4 FENO bounds will be installed per the Commissions comments.Mr.Man provided detail of the improved connection from downspout to the retention system. Mr.Bitsko exclaimed that the detail of overflow is different than usual,but will however, work. On a motion by Mr.Bitsko and seconded by Ms.Dohan the Commission voted 4-0 in favor to close the hearing. Bpm DEP File No.201-1109,Bylaw No.BE 1067 NOI,4 Hancock Ave. Owner/applicant:Zoltan Juhasz,Barlex One LLC Project:Addition to single family home within the 100-foot buffer zone of bordering vegetated wetlands Need to list applicable documents f om the record for reference(ie. the RDA filing, any plans, any engineering review, any letters, drainage calcs, etc.) Presenter:Juhasz Zoltan,Professional Civil Engineer Mr.Zoltan presented the project and provided an updated plan based on the observations from the weekend site visit with the Conservation Commission.The wetland onsite was delineated by LEC under the adjacent Hancock Street administrative review for work beyond the 100- foot buffer zone.Mr.Zoltan proposes to remove the paved driveway,garage and porch and replace the driveway with previous pavers.A 120 sq.ft.porch,a 900 sq.ft.addition and attached garage will be added to the back.A portion of the garage falls within the 100ft. buffer.No activities will take place closer than 70'ft.from the wetlands boundary on abutting lot.No structures will be closer than 84'from the wetlands.In order to mitigate runoff there will be an installation of an underground retention facility.Mr.Zoltan recalled Mr.Bitsko's concern about the perviousness of the driveway.Mr.Bitsko suggested that the driveway be modeled as an impervious surface to make sure that runoff will be contained over time with the proposed recharge system.Mr.Zoltan confirmed that the proposed recharge system will provide better drainage than is provided with the existing system. Mr.Zoltan entered the revised drainage calculations in response to Mr.Bitsko's request into the record.