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Site History <br /> 14000 Highway 88, Lockeford CA <br /> Time Oil Property No 04049 <br /> When compared to the December 1996 sampling event, groundwater concentrations increased slightly in <br /> MW-6, MW-7, and MW-10, while slight decreases in hydrocarbon concentrations were observed in MW- <br /> 1, MW-3, MW-4, MW-5, and MW-9 Hydrocarbon concentrations in MW-2 and MW-8 remained <br /> relatively unchanged With the exclusion of MW-10, which contained hydrocarbons for the first time <br /> since monitoring began, the range of hydrocarbons observed is consistent with previously collected data <br /> Changes in hydrocarbon concentrations may be a result of a changes in groundwater elevation, however, <br /> not enough data has been collected to evaluate their significance Additional monitoring data will be <br /> collected to further evaluate the extent of the dissolved hydrocarbon plume <br /> A copy of SECOR's "Quarterly Monitoring Report- March1997" dated May 6, 1997, was forwarded to the <br /> appropriate regulatory agencies on May 19, 1997 <br /> 12 <br />