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H <br /> Mr. Edward Ralston 2 April 15, 1993 <br /> Chromal-ab reported that TPH-G and BTEX were not detected in the water samples <br /> 4 <br /> L from wells MW-1 , MW-2, and MW-4. The groundwater analytical data are presented <br /> in Table 2. Copies of the current laboratory report and Chain-of-Custody <br /> documentation are attached to this report. The sample labeled as MVM-B was a <br />! duplicate sample obtained from well MW-1 . <br /> We recommend that the wells continue to be monitored quarterly until they are <br /> properly closed. <br /> We recommend that copies of this report be sent to Mr. Harlin Knoll at the San <br /> Joaquin County Department of Public Health Services; and Ms. Beth Thayer at the <br /> California Water Quality Control Board, Central Valley Region. <br /> If you have any questions or comments, please feel free to call us at (510) 416-2902. <br /> Sincerely, <br /> MITTELHAUSER CORPORATION <br /> D GF <br /> GJ <br /> J Vii-o <br /> 4516 <br /> Steven W. Pierce oft David J. Blunt <br /> Senior Hydrogeologist Geoscience Manager, RG 4516 <br /> f <br /> OF CAUF��\P <br /> SWP:DJBIbai <br /> 2168R001.WP <br /> Attachments: Figure 1 : Site Location Map <br /> f Figure 2: Groundwater Gradient Map <br /> Table 1 : Groundwater Monitoring Data <br /> Table 2: Summary of Groundwater Analytical Results <br /> Laboratory Analytical Results <br /> Chain-of-Custody Documentation <br /> Field Notes and Sampling Protocol <br /> l <br /> k. <br /> r. <br /> 4 <br />