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k" KLEINFELDER <br /> EDB was not detected in any of the groundwater samples collected for laboratory analysis this <br /> quarter. <br /> The six groundwater samples were also analyzed for the oxygenates MTBE, DIPE, ETBE, and <br /> TAME. Only MTBE was detected in one groundwater sample (MW-DIS-14s) with a <br /> concentration of 7.0 ug/l. The oxygenates MTBE, DIPE, ETBE, or TAME were not detected in <br /> the remaining five groundwater samples submitted for laboratory analysis. The PMCL for <br /> MTBE is 13 ug/l and the Secondary Maximum Contaminant Level (SMCL) for MTBE is 5 ug/l. <br /> f The detected concentration of MTBE in MW-DIS-14s does not exceed the PMOL, but does <br /> ` exceed the SMCL for MTBE in water. PMCLs are derived from health based criteria, whereas <br /> SMCLs are derived from human welfare considerations such as taste and odor. <br /> All six groundwater samples were analyzed for TBA. TBA was not detected an any of the <br /> groundwater samples submitted for laboratory analysis. <br /> Kleinfelder recommends that a copy of this report be submitted to Mr. Mike Infurna of the San <br /> Joaquin County Public Health Services Department Environmental Health Division (PHSIEHD) <br /> and Mr. Marty Hartzell of the Central Valley Office of the State of California Regional Water <br /> Quality Control Board(CVRWQCB) by Del Monte Foods for their review and consideration. <br /> This report is subject to the limitations found in Chapter 7 of this report. <br /> f <br /> 12280.MON/ST02R134 Page 2 of 14 <br /> ©2002,Kleinfelder,Inc July 26,2002 <br />