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Mr. Doug Schneeberger 4 May 17, 1995 NO- Total metals analyses for the August 10 and 26, 1994 sampling events were believed to be affected by the sample turbidity; therefore, causing higher detected concentrations. Ground water samples collected from several monitoring wells during these sampling events were above maximum contaminant levels (MCLs) for chromium and lead of 0.10 and 0.015 mg/f, respectively. Results for dissolved chromium during the March 16, 1995 sampling event were below the MCL for chromium for each ground water sample collected (Table 3). Based on the dissolved chromium results, the sample turbidity appears to be the cause of ele- vated metals concentrations. The PQL achieved for dissolved lead (0.05 mg/f) was not low enough to evaluate the dissolved lead results against the MCL. Additional evaluation of dis- solved lead concentrations will be performed during the second quarter 1995 at a lower PQL. CLOSING The data and information used in the preparation of this letter report was believed to be complete and accurate at the time of writing. However, neither Remcor nor American Geological Ser- vices makes any warranty as to the completeness or accuracy of the data obtained from various sources. As such, any recommendations or conclusions based upon such data are subject to revi- sion as deemed necessary. Additionally, ground water conditions not observed or reported may affect the conclusions of this letter report. All aspects of this investigation were performed in accordance with all applicable laws, regula- tions, geologic and hydrologic standards in effect at the time of this writing. At no time is any warranty, either expressed or implied, made with respect to the geologic or hydrologic condi- tions beneath the Tracy Cold Storage site. :30091 Ft "REALISTIC SOLUTIONS FOR HAZARDOUS WASTE PROBLEMS"