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i I uti izing EPA Method 8260B Groundwater well purge and sample logs are contained in Attachment 1 ANALYTICAL RESULTS TPHg was detected in samples collected from wells MW-2P, MW-1, and MW-2 at concentrations of 99 micrograms per liter (µg11), 720 µg/l, and 86 µg11, respectively Benzene was detected 1n the sample collected from MW-2P at a concentration of 12 µg11 MTBE was detected in the samples collected from MW-2P, MW-3P, and MW-1 at concentrations of 150 µg11, 3 8 µg11, and 240 µg11, respectively DIPE was detected in the samples collected from MW- 1P, MW-2P, MW-3P, MW-4P, MW-5P, and MW-6P at concentrations of 120 µg11, 67 µg11, 160 µg11, 120 µg11, 46 µg11, and 180 µg/l, respectively 1,2-DCA was detected in samples collected from MW-1P, MW-2P, MW-3P, MW-5P, MW-6P, and MW-1 at concentrations of 8 6 µg11, 10 µg11, 17 µg11, 9 7 µg11, 18 µg11, and 2 4 µg11, respectively A summary of analytical results is presented in Table 2 Laboratory data sheets and chain-of-custody documentation are contained in Attachment 2 GEOTRACKER DATA UPLOAD The depth to water data was submitted electronically to the State Water Resources Control Board • (SWRCB) Geotracker database (confirmation number 9698530435) and the laboratory data was also submitted electronically to the SWRCB Geotracker database (confirmation number 8055615186) The facility has been assigned a Geotracker global identification number T0607700064 Documentation of the data submittal is contained in Attachment 3 CONCLUSIONS AND RECOMMENDATIONS The groundwater flow direction on November 10, 2004, was variable generally toward the southeast, and similar to the predominate historical pattern Based on the results of the fourth quarter 2004 monitoring episode, we recommend continued quarterly monitoring and additional off-site investigation to define the lateral extent of impacted groundwater to the northwest and southeast s(environmental12591210003-StocktonlQuartly13QR-2004 doe 3 I