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I <br /> k'q KLEINFIELDER <br /> The concentrations of toluene were also shown to increase in each of the monitoring <br /> wells with the exception of SVE-south and NP-1-80', and remained steady in NP-1- <br /> 90'. The detected concentrations of toluene are below the PMCL for toluene in water <br /> in monitoring well MW-DIS-2 and SVE-north. The remaining five detected <br /> concentrations of toluene exceed the MCL for toluene in groundwater. <br /> Similarly the concentrations of ethylbenzene detected appeared to rise in each <br /> monitoring well with the exceptions of SVE-south. The detected concentrations of <br /> ethylbenzene are below the PMCL for ethylbenzene in water in monitoring well <br /> MW-DIS-2 and SVE-north. The remaining five detected concentrations of <br /> ethylbenzene exceed the MCL for ethylbenzene in groundwater. <br /> The concentrations of xylene appeared to rise in each monitoring well with the <br /> exceptions of SVE-north and SVE-south where the concentration of xylene dropped <br /> compared to last quarter. The detected concentration of xylene is below the PMCL <br /> for xylene in water in monitoring well MW-DIS-2 and SVE-north. The remaining <br /> five detected concentrations of xylene exceed the MCL for xylene in groundwater. <br /> Toluene, ethylbenzene, and xylene was not detected in any of the groundwater <br /> sampled collected from the newly installed monitoring wells MW-DIS-11d, MW- <br /> DIS-12,MW-DIS-13, MW-DIS-14, and MW-DIS-14d. <br /> The oxygenates .(MTBE, DIPE, ETBE, TAME) or TBA were not detected in any of <br /> the groundwater samples collected for laboratory analysis. <br /> Kleinfelder recommends that monitoring of the site should be continued in accordance <br /> with the "Groundwater Monitoring Frequency Decision Tree" established for Del Monte <br /> by CH2M Hill (previous consultant) at this time. <br /> A copy of this report should be submitted to the San Joaquin County Public Health <br /> Services Department Environmental Health Division and the Central Valley Office of the <br /> State of California Regional Water Quality Control Board by Del Monte, Inc. for their <br /> review and consideration. <br /> This report is subject to the limitations found in Chapter 7 of this report. <br /> 4 <br /> . I <br /> 12280.MON/2002R394 Page 13 of 15 <br /> ®2002,Kleinfelder,Inc May 10,2002 <br />