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.fl n <br /> Unocal recommendingadditional assessment activities to complete delineation of <br /> p <br /> petroleum hydrocarbon impact <br /> NEXT QUARTER ACTIVITIES <br /> Second quarter 1998 groundwater monitoring will be performed Unocal will submit a <br /> work plan to further assess areas of concern outlined by San Joaquin County's <br /> February 20, 1998 letter <br /> DISCUSSION <br /> Groundwater elevation and flow direction data are consistent with those data gathered <br /> during previous events Groundwater hydrocarbon concentrations appear consistent <br /> with previous quarterly events Groundwater analytical data for the March 1998 event <br /> indicate that the dissolved hydrocarbon plume is not delineated north (downgradient) of <br /> the site On behalf of Unocal, Pacific Environmental Group will prepare a work plan to <br /> further assess soil and groundwater impact, as requested by San Joaquin County <br /> CHARACTERIZATION/REMEDIAL STATUS <br /> Soil contamination delineated? Yes <br /> Dissolved groundwater delineated? No <br /> Separate-phase hydrocarbons delineated? Not applicable <br /> Amount groundwater contaminant recovered this quarter? Not applicable <br /> Soil remediation in progress? Not applicable <br /> Anticipated completion date? Not applicable <br /> Dissolved/separate-phase hydrocarbons remediation in progress? Not applicable <br /> Anticipated completion? Not applicable <br /> CONSULTANT: Pacific Environmental Group, Inc <br /> 3101252A/1 Q98QSR.DOC 2 May 22 1998 <br />