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1 <br /> 16) Groundwater elevations Increased approximately l 42 feet from the previous <br /> event performed in January 2004 The elevations ranged from —17 65' to — <br /> ' 18 41' MSL The groundwater flow direction is easterly at a gradient of <br /> approximately 4 92 x 10-3 feet per linear foot <br /> 2.3 BTEX and TPH-G Analytical Results <br /> Petroleum hydrocarbons of toluene, ethylbenzene, xylenes, and TPH-G were <br /> detected in the groundwater sample from well MW-2 However, the BTEX <br /> and TPH-G concentrations decreased significantly from the previous event <br /> This is the first event in which benzene was not detected in well MW-2 <br /> There were no detectable BTEX or TPH-G concentrations measured in the <br /> ' samples collected from wells MW-1, MW-3, and MW-4 <br /> The current BTEX concentrations were evaluated against the California <br /> Drinking Water Maximum Contaminant Levels (MCL)s The MCLs for <br /> benzene, toluene, ethylbenzene, and xylenes in groundwater are 1 pg/L, 150 <br /> µg/L, 700 pg/L, and 1,750 µg/L, respectively Based on the current <br /> groundwater monitoring data,the MCLS have not been exceeded in any wells <br /> 2.4 Oxygenates Analytical Results <br /> The analyte MTBE was the only oxygenate with detectable concentrations <br /> The analyte was detected in well MW-2 The concentration was just above <br /> ' the reporting limit at 1 i ug/L There were no detectable oxygenates <br /> measured in the remaining wells <br /> 1 <br /> 1 <br /> 9 <br /> April 2004 <br /> Quarterly Groundwater Monitoring Report <br /> ' Earthgrains 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\ENV162400132512U82EG1Projects\Stockton Center SiMnvesugairve and Quanerly ReporlSlQuartetly Report 04 2004 doc January 18 2005 <br />