10/7/2010 CONSERVATION COMMISSION Minutes

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' a 7:18 Glenn Wong SE 3-2626 01 Tide Run) Demolish J Rebuild single family home , NOI Resource Area* Buffer zee to salt marsh,, Lard Subject to Coastal Storm Flow Jack Vaccaro from Vaccaro Environmental Consulting is the representative for the homeowner and explains that this property is on J hu' Pond and is almost entirely in the Waquolt Bay ACE.C. They were previously approved for vegetation rehabilitation due to unauthorized clearing. The site is very gradually sloping so there are n ,coastal banks. The only resource areas of concern are the most landward bordering vegetated wetland and land subject to coastal storm flog. The proposed home will be larger but the extension of the structure is towards the street and will end up with less structure within o' f the wetland. They will be installing a de-nitrification system and providing mitigation. They also are looking for approval to improve an existing storm water outlet which is along the south side of the property by installing a rain garden which would reduce harmful components of St rrnwater as it flows through the mulch and plants. It would reduce sediments that otherwise would make its way down to the wetland. It is approximately 400 sq. ft. in the depressed Swale between the existing outlet and the wetland. They are also proposing the standard drywells, four of there around the perimeter of the house to help improve the infiltration of roof runoff. Agent McManus asks if the pool/patio edge is going right up to the snotubes or the extent of the cantilevered deck and Mr. Vaccaro says it will extend to the cantilevered dei . Agent McManus asks about the path along the edge that was permitted at the last hearing and if it was going to affect the approved mitigation. Mr. Vaccaro explains than there will be a vertical wall right at the edge and the existing grade will not be changed. There will be the patio with no rear lawn and they just warted a strip at the base of the wall which does not go into the previously approved area of plantings. He alsoelievres the project will start a soon as possible so that the mitigation can be completed by spring. es McManus reads for the record the Board of Health's comments which states that the ap li ati n'h s been submitted and is under review. John Slavinski from Cape & Islands Engineering explains that this project does not need to go t Zoning as it is a coastal subdivision which conforms to current zoning in the Town of Mashpee and will not need any variances requested. The new construction will meet the regulations for this flood zone. Motion made, seconded and unanimously carried to Close and Issue 7:21 Leslie Caffyn 1Popponesset--Island Road) New Title V septic, remove garage, install I water line & pump, fill existing cesspool — RDA Resource Area: Buffer Zone to Coastal a klu e Z ne to Salt Marsh John Slavinski from Cape & Islands Engineering represented the home owner and explains that there is an old frame of a garage,that gill need to be removed it order to install the new septic in than area which is more than 50 "from the top of the coastal bank. The septic system is state of the art. It is innovative and alternative; a pump with a wall around it is being installed so that it won't be above ground; a portion of time system will have denitrification; and an ultra violet light is being added that will treat the effluent as it comes out of the`Fast system through the D-Box and headed towards the leach field. Eventually this property will be a year round resident. Motion made, seconded and unanimously carried for a Negative Determination n 7.24 Marianne & Mark Townsend SE 43-2627(16 Deans Hollow Road) Eradicate invasive and non- native species, removal of hazardous trees and planting of native species with maintenance in perpetuity Resource Area* LSCSFIBufferto Coastal anklDue