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k% KLEINFELDER <br />Water samples were collected by Hydro—Search and Kleinfelder on April 28, <br />1988, after approximately 4,000 gallons were purged from the well. The <br />well pump had been operating at various times during the day; therefore, <br />the actual volume of water purged could be much greater. <br />Water samples collected by Hydro—Search were submitted to Canonie <br />Laboratories in Stockton, California on April 28, 1988, and were analyzed <br />for halogenated hydrocarbons by EPA Method 601, electrical conductance, <br />pH, and total dissolved solids. <br />Duplicate water samples collected by Kleinfelder were submitted to <br />Chemwest Laboratories in Sacramento, California on April 29, 1988, and <br />analyzed for the same suite of parameters. <br />A second set of water samples were collected by Hydro—Search and <br />Kleinfelder on May 6, 1988. The second round of water samples were <br />collected because Hydro—Search's field blank (collected April 28, 1988) <br />contained detectable levels of contaminants, while the sample collected <br />from the well water contained no detectable levels. Hydro—Search <br />submitted the second round of water samples to Canonie Laboratory in <br />Stockton, California. Kleinfelder submitted one water sample collected <br />from the domestic well and a field blank prepared at the site from a <br />commercially prepared distilled water. These water samples were analyzed <br />for halogenated volatile organics by EPA Method 601. <br />All water samples collected by Kleinfelder were placed in an iced cooler <br />and transported to the analytical laboratory under chain—of—custody <br />protocol. A copy of the chain—of—custodies are contained in Appendix A. <br />4.6 WATER SAMPLE ANALYTICAL RESULTS <br />Analytical results of the samples collected April 28, 1988 by Kleinfelder, <br />indicated total dissolved solids at 210 mg/1, a pH of 7.7 and an <br />electroconductivity of 260 umhos. The analysis for halogenated volatile <br />organics indicated trans-1,2—dichloroethene at a concentration of 0.6 mg/l <br />with a detection limit of 0.2 ug/l (reference Table 1 and Appendix A for <br />sample number and laboratory results). <br />104-88-683 9 <br />