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JBT continued <br /> PAGE • <br /> QQN AMINANT S <br /> In addition to groundwater samples, DEP collected ten surface water samples from the <br /> Mashpee-Wakeby Pond. One of the samples contained chlorinated solvents. One sample <br /> collected immediately above the pond bottom contained 5.7 ugll of PCE, 2.1 ug/1 of <br /> 1,1,2,2-TeCA, 1.2 ug/1 of TCE, 0.7 ug/1 of vinyl chloride and lover concentrations of <br /> other related compounds. None of the chlorinated solvents in the surface water ex- <br /> ceeded either the acute or chronic fresh water environmental toxicity value. <br /> All surface water samples contained love concentrations(less than 4 ug/1)of methyl tent <br /> butyl ether(MTBE). MTBE is an additive to gasoline and its presence may be the result <br /> of motor boats in the pond. <br /> CLEANUP ACTIVITIESIPLANS <br /> The installation of monitoring wells at this site ispart of the continuous cleanup efforts <br /> by DEP that are taking place at the JBT site. The wells were collecting information to <br /> complete the design of a groundwater treatment system. <br /> DEP and its contractor-are evaluating the new groundwater data to determine the appro- <br /> priate cleanup technology.A report is due September, 1997. Upon review and approval <br /> of this report, the appropriate treatment system will be put out to bid. <br /> DEP is committed to cleaning up the plume migrating from the J. Braden Thompson <br /> Road Site. <br /> i <br /> For more information, please contact: <br /> Gerard Martin <br /> Actin Section Chief <br /> Acting .; <br /> Site Management&P emutting <br /> (508) 946-2799Ta <br /> •1. <br /> .r <br /> .3 <br /> AuVtv 19, 1997 <br />