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CA <br /> _ <br /> A S S O C I A T E S 'I N°C . <br /> I <br /> was calculated to be 0.003 ft/ft or approximately 14 ft/mile. A summaryof groundwater <br /> monitoring data is presented in Table 1. <br /> CONCLUSIONS <br /> Concentrations of petroleum hydrocarbons in wells MW2 and MW3 and TPHg in well MW 1 <br /> remained nondetectable. The concentrations of benzene and xylenes decreased_ to nondetect in <br /> x <br /> well MW 1. The. direction of groundwater, flow, is consistent with the previous event. <br /> Groundwater elevations have decreased since June 1999. <br /> RECOMMENDATIONS <br /> r Based on the results of the fourth quarter 1999 monitoring episode,.we recommend evaluation of <br /> the site for closure: <br /> Please contact our office at (209)579=2221 if you have any questions or comments. <br /> Respectfully submitted, <br /> ATC Associates Inc. <br /> Jl � rT, J`iU _ <br /> Drew Van Allen ) 'IC� _N <br /> ' ,,. <br /> Project Manager j0 ET Jeanne Homsey, y p w <br /> CA Registered Civil Engineer No. 47410 a �;`,1. � <br /> � g r <br /> cc: Mr. James Giottonini, City-of Stockton-Department of Public Works <br /> Mark List,RWQCB <br /> �J <br /> w:\62574\62574.05\rcports\4qr-1999.doc 3 <br />