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1 <br /> 3 SUMMARY AND RECOMMENDATIONS <br /> Groundwater-monitoring has been conducted at this facility since 1999 to evaluate <br /> groundwater quality A summary of the current site conditions and a <br /> recommendation for subsequent work are as follows <br /> Diming this event,the depths to groundwater among the wells average at about <br /> 29 46' (-19 69 MSL). The groundwater flow was generally easterly at a <br /> gradient of about 5 66 x 10" feet per linear foot <br />' • Benzene was present in well MW-2 during this event The remaining toluene, <br /> ethylbenzene, xylenes, and TPH-G concentrations in well MW-2 increased <br /> since the previous event <br /> • The current BTEX concentrations were evaluated against the California <br /> Drinking Water MCLs Based on the current groundwater-monitoring data, <br /> the MCLs for benzene and toluene have been exceeded in well MW-2 <br /> • The only oxygenate detected was TBA in well MW-2 <br /> ' Based on the results of the April 2004 sampling event, it appears that the remediation <br /> system sufficiently works in removing the contamination The system was taken out <br /> of operation after July 23, 2004 in order to operate the system in a "pulsed" mode <br /> The August 2004 sampling event occurred while the system was disengaged The <br /> contaminant concentrations increased upon the temporary disengagement of the <br /> ' remediation system The system will be placed back into operation as soon as it can <br /> be configured into "pulse" mode PSC recommends that the current quarterly <br /> ' groundwater-monitoring plan continue as is <br /> 1 <br /> ' <br />� <br /> August <br /> 2004 <br /> Quarterly Groundwater Monitoring Report <br /> Earthgralns Baking Companies,Inc <br />{ (Former Kilpatrick's Bakeries,Inc) <br /> 1717 South Center Street <br /> Stockton California <br /> Prepared for SARA LEE BAKERY GROUP Prepared by Philip Services Corp <br /> ' H\ENNM24001325121382EGTmjectslStockton Cella Stltnvestagative and Quarterly Reporls\Qunnerly Report 10_2604 dac January 18,2005 <br />