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i <br /> Fourth Quarter 1996 Groundwater Morutonng Report <br /> 2350 Waterloo Road,Stockton,Caltfonna <br /> GROUND-WATER SAMPLING AND ANALYSES <br /> Ground-water samples were collected from all three wells All samples were analyzed for concentrations <br /> of <br /> • TPH as gasoline, modified EPA Method 8015, <br /> • BTEX and MTBE by EPA Method 602 <br /> Analytical results from July, 1994 to-date are summarized in Table 2 The laboratory report and chain- <br /> of-custody form for the current samphng event are attached Benzene was not detected in wells MW-1, <br /> MW-2, MW-4, MW-5, and MW-6 Benzene concentrations increased in MW-3 as compared to the <br /> previous sampling event A benzene isoconcentration map is illustrated In Figure 3 <br /> A copy of this quarterly monitoring report should be forwarded to the following parties <br /> San Joaquin County Environmental Health Department <br /> Attention Mary Maze <br /> 445 North San Joaquin Street <br /> Stockton, California 95201 <br /> California Regional Water Quality Control Board <br /> Central Valley Region <br /> Attention Gordon Boggs <br /> 3440 Routter Road <br /> Sacramento, Califorma 95827 <br /> 2 <br /> 86 ®021233 <br />