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THIRD QUARTER 2003 REPORT KWIKEE FOODS 2081 Country Club Boulevard Stockton, California September 12, 2003 EXECUTIVE SUMMARY Groundwater monitoring took place on August 21. The depth to groundwater was measured with a water level meter and water samples were collected from four of seven monitor wells. A battery- operated purge pump was used to purge the wells of standing water, which was stored in DOT- approved drums on site. The samples were analyzed for Total Petroleum llydrocarbons as gasoline, volatile aromatic hydrocarbons (BTEX), 1,2-DCA, and five gasoline oxygenates. The depth to groundwater increased by more than 2 feet since May. The cone of depression that had previously resulted from the remediation system at the former Chevron site at 2103 Country Club Boulevard has now fully disappeared, and has been replaced by a northeast-trending mound in the piezometric surface. This mound had begun to develop as early as May 2003, but has now lengthened and extends completely across both sites. The hydraulic gradient transverse to the mound crest is steeper than it is parallel to the crest, and it appears that groundwater flow is • strongly channelized in a northeastward direction. Slight increases in contaminant concentrations were detected in KF-1 and KF-3, probably as a result of northeastward groundwater flow from the Chevron site to the Kwikee site. Concentrations continued to decrease in KF-5, which is farther to the southeast of the mound crest. Rather surprisingly, laboratory data supplied by Gettler-Ryan Consultants did not show an analogous increase in the two wells between the Chevron and Kwikee sites, although both are in the direction of groundwater flow off the mound crest. No 1,2-DCA was detected in any of the wells from either site, and it appears that this is not a contaminant of concern. 1