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Re: Site assessment report <br /> San Joaquin Local Health District 260 S. fjain Street, manteccl, CA <br /> September 18-,—19-89---Ykg2- <br /> 6. A. Conclusions: because of the close proximitY in <br /> It is MY considered opinion that <br /> re-excavation to the <br /> depth of the sidewall samples taken during <br /> original bottom sample taken during routine tank removal and that <br /> no evidence of contamination was found at a depth of 14 feet direcIY <br /> I bottom sample, that the 71. and 110. mg/kg Total <br /> under the original <br /> Extractable Petroleum jiydrocarbons was the result Of a small amount <br /> rocarbon. This probably <br /> of sluff or a small isolated pocket of hyd All samples from the <br /> was a result Of a small over fill over time Past- <br /> re-excavation showed "None Detected" levels of all COnstituants Of <br /> petroleum hydrocarbons, therefore, any small amol,7t of contamination <br /> threat to any part of the <br /> remaining in the backfill would pose no eaeration, 0 gr <br /> e, nor do <br /> nvironment. With these thoughts in min r d, I do not believdwater <br /> I recommend any further sail remediationt <br /> un <br /> monitoring steps- <br /> ;respectfully submitted, <br /> JIM The�E OIL, INC. <br /> Richard Thorpe <br /> President <br /> cc, Calif. Regional Water Quality Board Claudio Dell'Eva <br /> wi <br /> J <br /> ML <br />