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J. H. KLEINFELDER&ASSOCIATES <br /> File: W-2006-1 <br /> December i6, 1965 <br /> Page 15 <br /> of the upper aquifer zone and capillary fringe may need to be <br /> undertaken but this should be addres,ed either separately <br /> through a ground water remediation program or through a <br /> combined soil and ground water program. <br /> Ground Water <br /> The data p~esents several interesting findings regarding the <br /> - - nature and extent of gasoline and ,its constituents in tie <br /> -' area ground water. Although they are interrelated the <br /> fallowing presents a summary of our findings for the <br /> production well , adjacent surface impoundments and ground <br /> water underlying the excavation. <br /> A. Production Well <br /> - The first set of analysis on the , <br /> Y p_ roduction sael I <br /> detected BTX at very low concentrations. These <br /> concentrations are at or extremely close to reported <br /> limits of detection. The need to drop the detection <br /> limits to these levels was prompted by State ac'*ion <br /> levels for these compounds, particularly for benzene. <br /> Subsequent analyses of production well samplescollected <br /> t <br /> at the start-up, mid point and conclusion of the 24--hour <br /> pump test did not detect these compounds. The pump test <br /> - — - - - - shows that operation of the production well did not - - - <br /> effect an artificial hydraulic gradient on the shallow <br /> ground water and draw water from the excavation area <br /> W <br />