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�. TC __ J <br /> AS SOCIATES ANC . <br /> 1999 was calculated to be 0.003 ft/ft.or approximately 14 ft/mile. A summary of groundwater <br /> monitoring data is presented in Table 1. <br /> CONCLUSIONS <br /> Concentrations of.petroleum hydrocarbons wells MW2 and MW3 remained nondetectab le. The <br /> concentration of TPHg decreased to nondetect in well MW 1::- The direction of groundwater flow <br /> is consistent with the previous event. Groundwater elevations-have.decreased since.June •1999. <br /> RECOMMENDATIONS <br /> f <br /> Based on the results of the third quarter 1999 monitoring episode;we-recornmend the following: <br /> Y • Conduct the Fourth Quarter 1999 groundwater.monitoring and sampling of wells MW 1 <br /> { through MW3 and analyze samples for TPHg, BTEX;and oxygenate fuel additives. <br /> 1 Upon receipt of results of the Fourth Quarter 1999 event, evaluate the site for closure. <br /> Please contact our.office at(209) 579-2221 if you have any questions or comrnents. <br /> � <br /> Res ectfull submitted,� p y <br /> ATC Associates Inc. <br /> •.�!l lap 3"H 1�1a�A. <br /> Drew Van Allen <br /> Project Manager f �•Fr> t':, ' 4 �.% <br /> 1 , <br /> �JeanneHomsey, . . 4>' � Cr <br /> F� <br /> CA Registered Civil Engineer No. 47410 <br /> cc: Mr..-James Giottonini, City of Stockton Department of Public Works <br /> Mark List,RWQCB <br /> a <br /> f V . <br /> w:\62574\62574.05\qugrtly\3gr-1999.doc 3' <br /> I <br />