Laserfiche WebLink
The April 2004 quarterly groundwater-monitoring event indicated that the <br /> groundwater elevation increased approximately 1 42 feet from the previous <br /> event performed in January 2004 During this event, the average depth to <br /> groundwater was 27 73' (-17 97 MSL) The groundwater flow was easterly at <br /> a gradient approximately 4 92 x 10-3 feet per linear foot Petroleum <br /> hydrocarbons were not detected in samples collected from wells MW-1, MW- <br /> 3, and MW-4 The benzene concentration in well MW-2 was non-detect <br /> during this event The remaining toluene, ethylbenzene, xylenes, and TPH-G <br /> concentrations in well MW-2 decreased significantly from previous events <br /> MTBE was the only oxygenate detected and only in well MW-2 The <br /> detectable concentration was dust above the reporting limit <br /> The air sparging/soil venting system was taken out of operation after the July <br /> ' 23, 2004 event in order to operate the system in a "pulsed" mode Pulsed <br /> operation can allow soil vapor concentrations to rebound during the intervals <br /> of non-operation <br /> ' The August 2004 quarterly groundwater-monitoring event indicated that the <br /> groundwater elevation decreased approximately 1 73 feet from the previous <br /> ' event performed in April 2004 During this event, the average depth to <br /> groundwater was 29 46' (-19 69 MSL) The groundwater flow was easterly at <br /> a gradient approximately 5 66 x 10-3 feet per linear foot Petroleum <br /> hydrocarbons were not detected in the samples collected from wells MW-1, <br /> MW-3, and MW-4 Benzene, toluene, ethylbenzene, xylenes, and TPH-G <br /> concentrations in well MW-2 increased significantly, due to the air <br /> sparging/soil venting system being temporarily out of service The only <br /> oxygenate detected was TBA in well MW-2 The increase in concentrations <br /> indicates that the remediation system was working while in operation and then <br /> had a rebound affect when the system was disengaged <br /> The air sparging/soil venting system was placed back into operation in "pulse" <br /> mode on December 15, 2004 <br /> 1 <br /> r <br /> B <br /> • December 2004 <br /> Quarterly Groundwater Monitoring Report <br /> Earthgralns Baking Companies,Inc <br /> {Former Kilpatrick s Bakeries,Inc) <br /> 1717 South Center Street <br /> Stockton,CaliforniaPrepared for SARA LEE BAKERY GROUP Prepared b} Philip Services Corp <br /> H 1ENy162400112\121382EGVrolects\Stockton Cenier SOnvestigative and Quanerly Repons\Qusrterly Rcwn 12_2004 doc January 18 2005 <br />