1/22/1988 CONSERVATION COMMISSION Minutes

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Drainage Easement January 2 , 1988 Fuge 2. them out and stated they were served by other oil/water separators and other drainage areas on the base. He also pointed o some Underground tanks also serviced by other drainage areas . There are no above ground systems in this area at all , Hr. Patrick questioned whether they knew the underground water tables. Col . Brogna stated the underground aoq fifer goes- from a. NW direction to the S . For the purpose of the agenda for tonight, they were asked to address 7-8 separate issues, that is being done. He referred - to the E.C.. ordan -studies for this information. On the map he pointed to three above ground fuel storage tanks with ars oil/water separator that services the area between the tans and shumet Pond. He offered to supply copies of the E.C. Jordan -'port to anyone interested. Question was raised from the audience re the flow to Ashumet Pond and the same type of easement not being discussed. lis Behrman advised it is n •t the same issue. As to whether it will be further addressed at another time, Hs Be rman stated this hearing is just to address the r issue of -what i s going through town land. .,Mr .' Patrick stated if the ground water table flows to that are a+ of Johns Pond and you have underground storage tanks, .that is somethi"ng he would like to know- •about . . Cal . rogna suggested. h'e', call the Select- mens bffice to obtain the report and i not available', call his office. Col . Brogna stated downgradient. from the base, off • he .flight I line area 'south, is an oil/water separator and an- underground drainage- out- let -with - t- 1et -with headwall and the proposed easement . flows above, t'he ground from this area t{hr ugh the McDonald property to the Town, of - ashpee. F One of the questions by Town Counsel was re en ironme .t l' testing tLo date. All eight issuer have been addressed in -the`. report to . t .e-;Comm-. ission. ' One specifically asked for any monitoring well testi - = and. sampling done to date. - The results arezvailable for i spe,etion and -re- view. nd -re- vie . The one cluster monitoring well that has been installed by E.C.9 Jordan, ''# 1 ,- which is one-third of the war from- the Base to Johns Pond This was sampled in 1986 five tines, five separate wells from a .., depth .of -30-105 feet. with the exception - of Methyl-ethyl Tetone which is a Probable lab contamination, the only actual hit itself was Tetra,- ' hlorethyle'ne at one test taken on 5/15/87 at a depth of 85 feet. This was the first ro d of sa.mPling, the last four samplings dick not pick up any -of that, same material . These were presented to the TC tom - ittee last summer and fall . He offered to answer any questions. Ms Behran asked if trey ,were proposing to do any surface water mon- itoring along the easemeyt'.' Col . Brogna stated B. C.,Jordan -will -.be pre- senting to them, between now and -Spring, another work plan for' further study based on the results- of all the monitoring wells in that portion of the base. Some will be - in the area -of the proposed easement, most will 4 be elsewhere. lis eh�rman: TThese- are basically looking at ground water. Col . Brogna: Basically ground water, but if there is a need, y+ through the review of BPA, DEQE and the respective communities, surface- testing urface- testing could be incorporated.