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Evaluation of Contamination 1989 <br /> Former Texaco Service Station, Manteca Californiaanuary 3, <br /> � AGS 38D553-13-1 <br /> material, compacted under the direction of an engineer, and <br /> covered with a relatively .impermeable surface. <br /> In addition., Applied GeoSystems recommends quarterly mcnitoring <br /> of the ground water quality to evaluate contaminant trend;; over a <br /> one year period. This ground-water sampling would allow <br /> evaluation of contaminant trends and variability of ground-waiver <br /> flow direction with time. If hydrocarbon concentrations do not <br /> increase during this period, we recommend the site be re- <br /> evaluated. We recommend that copies of this report be forwarded <br /> to Mr. Gordon Lee Boggs of the California Regional Water Quality <br /> Con4rol Board Central Valley Region and to Ms. Diane Hinson of <br /> the San Joaquin Local Health District. <br /> LIMITATIONS <br /> This report was ,Prepared in accordance with generally accepted <br /> standards of eM ironmentaieolo ical <br /> g g� practice in California at <br /> the time this investigation wa:: performed. This investigation <br /> was Conducted solely for the pur?aose of evaluating environmental <br /> conditions of the soil and ground water with respect to <br /> hydrocarbon-product contamination in the vicinity of the former <br /> - - - - - E <br /> n erground tanks and product Lines. No soil en <br /> gineering nor <br /> 18 <br /> Ai®p/led GeO-9�stems <br /> s <br />