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iiJ1."f's TEAM <br /> May 19, 1995 <br /> Mobil Oil Corporation Alton Project No. 30-0136 <br /> 3700 West 190th Street, TPT-2 <br /> Torrance, California 90509-2929 <br /> ATTN: MR. STEVE PAO <br /> SITE: FORMER MOBIL BULK PLANT'041343 <br /> 500 EAST GRAN ruNE ROAD <br /> TRACY, CALIFORNIA <br /> RE: QUARTERLY PROGRESS REPORT, <br /> APRIL THROUGH JUNE 1995 <br /> Dear Mr. Pao: <br /> . This quarterly report presents the results of fluid level monitoring and groundwater sampling at <br /> the above-referenced site. On April 20, 1995, fluid levels were measured and groundwater <br /> samples were collected in twelve monitoring wells. Groundwater samples were submitted to a <br /> state-certified laboratory for analysis. The results of the investigation are attached. Fluids <br /> recovered during sampling activities were stored onsite in labeled, Department of Transportation <br /> approved drums prior to transport by IWM, Inc. for offsite recycling at McKittrick Waste <br /> Treatment in McKittrick, California. <br /> ATTACHMENTS <br /> Figure 1: Groundwater Elevation Contour Map <br /> Figure 2: Dissolved-Phase Hydrocarbon Concentrations <br /> Table 1: Summary of Groundwaier Monitoring and Analysis <br /> Appendix: General Field Procedures, Official Laboratory Reports, and Chain of Custody <br /> Records <br /> This report was prepared in compliance with the requirements of the San Joaquin County <br /> Environmental Health Division. <br /> 30A Lindberph Avenue <br /> Livermore.California 91550 <br /> (510)606-9150-FAX J510)606.9M <br /> NIL— <br />