9/3/1998 AD HOC COMMITTEE ON PLUMES Minutes

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AD-Hoc COMMITTEE ON PLUMES IMPACTING MASHPEE MINUTES SEPTEMBER 31 1998 Greg Taylor, Chairman, called the meeting to order at 8 : 40 a t ra. in conference Room 2 , Mashpee Town Hall. Present* Greg Taylor, Bob Sherman, Dave Rich , Elliot Rosenberg , John Johansen , John Fitzsimmons , Tom zmoni&(, Nancy Ba lkus. Absent: Bob Whr i tenour , Bob Cram, Nancy caf f yn, Elias Mc uade. Greg T. stated the primary focus of today ' s meet in is FS-1 and approaches related to that issue. Greg T. turned the floor over to Nancy Ba lkus and Tom s z Ymoni a who gave a presentation on Bog/Qua.shnet Kiger Separation Alternatives , Nancy B. distributed a packet of materials that will be discussed at stakeholder meetings scheduled next week on September 9 and to in Falmouth and Mashpee. Nancy B. reviewed the alternatives (page 5 ) - No Action - Alternative A, Buy Out, Lona-Term Lease or Acquire Land - Alternative B: Interceptor Pipe - Alternative c: Extract , Treat, Discharge - Alternative D-. Pends Development Alternative E: Phased Approach, Iron Filing Pilot Test (Page 28 ) . The plan is to intercept the EDB that is presently upwel l ing and dilute i t before it is carried to the River, Concentrations of 5 . 4 were found primarily on the east end. They plan to block drainage channels to prevent entrance into the rain channel. . This an interum step to get the bogs back into operation and complimentary to a file remedy. (page 14 ) Nancy B. reviewed the results f rora surface water testin ater- testin , noting the highest hit of . 76 at Station 36 . (page 1 6 ) They received a hit of 5. 4 in a peat area. The peat thickness varies from 14 to 40 f eet which may cause stagnation. They plan to use natural gradients , similar to a french drain concept , to passively intercept the channel . It should tape a short time to see if this is effective. It is a phased approach, the first step being to block the channels and use the existing s ail as a collector , and then phase in the french drain concept. Bob S . raised a question about permitting and whether the Wetlands Act may apply. Nancy B. stated there are nation-wide permits ( specifically 9 3 4 ) available through the federal agencies . Further research needs to be done,.