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1 0 <br /> �l lg~X9-9 7 02 : 51P MaShPeO DPW 508-539-3894 P -04• <br /> L <br /> WOMARD&CURRAN <br /> 1 r�g i nee rings Science Operation's <br /> Mr,Ciregory Taylor,PE <br /> April'),, i 997 <br /> Page 3 <br /> s <br /> - centrations exc--edin applicable drinking a drinking ng water sour�..e. ��con g a PF g water standards exist at least <br /> 4.9500 feet southeast of the site. <br /> ition. The Draft Phase III Feasibility Study and Remedial Action Flan recommended <br /> P'ropnsed I�emed ,� .. <br /> cleanup level <br /> �- for contaminated soils on the JBT site and remediation of the contaminated groundwater <br /> using <br /> a containment/treatment approach. MaDEP recommended an Extraction well Fence near the <br /> estimated leading edge of the plume,at the end of Guild Road(Nie-?6A). Groundwater would be <br /> extracted,tracted treated and returned via an infiltration gallery. Implementation of the remedial action has not <br /> occurred. FF <br /> rred. Delays have a arently been caused by funding, negotiations to include the .IBT Gro43ndwater <br /> Tres <br /> trnent with the FS-12 Groundwater Treatment FaciI ity located at the neighboring MMR, and <br /> the more;recent(January 1997)Request for Information from the I�S DOD as regards past use <br /> possibly <br /> of the JBT"Junkyard" site. <br /> Current Status <br /> The sampling event rpt comp�v leted in February 1997 demonstrates that VDC contamination of the <br /> the past is still resent. In fact, review of Attachment No. 2. shows that not only <br /> groundwater detected in F p <br /> does sign <br /> i fi::int contamination exists at the leading edge of the plume(MW-(MW-'2.6A and -MW-5D)but that <br /> 'vN <br /> tl e�y�e is a l and aerial extent i s st=11 not defined. Because VM '�?7 w a s not located and thele =:�r e not <br /> .t �- am MCI event it is not known if this well,which had h;s:orically yielded <br /> inc id..d in the t'.ost recent s. p a <br /> loo-detect of VOCS, i3 noir within the plume. The pr�.3serce of contamill f, on at MV-27 would strongly <br /> suggest that releases of contaminated g:'oundwater could be occu -in to t:7e pond. <br /> Discussions• ion with Mi. Martin of the MaDEP indicated that further work is btiing planned to..of ne the <br /> s uss��. s <br /> leading edge of the plume <br /> This work.rv:ll like��r Include add tonal <br /> vertical and aerial extent of the I g p <br /> W-?6 'MW-?7 area,and oss i b l v on the"neck"of l nd exten i ng <br /> monitoring weils near MWR-5, p <br /> from the east shore and between the two ponds. <br /> It is our understanding that re <br /> mediation of the on--site soils has been completed and contaminated soils <br /> have been stockpiledon-site and covered with tarps. Implementation of the groundwater rem., d j al <br /> 3-- - however monitoring wel Is(M WR-l, ?, 3,4, 5 S and 5�� located along the <br /> system has r;c_�t o+�+.�.ai'red .. <br /> a <br /> r f t fence have been installed. The schedule fo construction of the groundwater <br /> p epos.d trea,men <br /> treatment s �s�en is not knrjwr <br /> Re-ce-mrnendations <br /> • plume is delayed the plume advances about 110 feet <br /> Each near that �nter^,�ent�on of the ground`vater p � . <br /> . The advance of the plume is civ dent as demonstrated by the <br /> towards th-.1. Wakeby-Nlashpee pond. e leaden edge of the <br /> • #'ccntarninants at what was thought to have been the g g <br /> increasing concentrations o <br /> .� <br /> ' w-16A). The concentration of PCE at this Iocatio n has step .� <br /> plurn.. at the end of Guild Road�. <br /> ,.� <br />