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16 TABLE 4 <br /> SUMMARY OF GROUNDWATER ANALYSES <br /> TPH-g/BTEX <br /> STOCKTON BRANCH <br /> 49 SOUTH WILSON WAY <br /> STOCKTON, CALIFORNIA <br /> Sample Sample TPH-g Benzene Toluene Ethyl- Total MTBE <br /> No. Date (mg/1) (ug/1) (ug/1) benzene Xylenes (ug/1) <br /> (ug/1) (ug/1) <br /> MW-1 2/25197 ND ND ND ND ND ND <br /> MW-1 10/20/97 ND ND ND ND ND ND <br /> MW-2 2/25/97 1.6 ND ND 1.20 370 ND <br /> Dup 2/25/97 1.9 ND ND 130 350 ND <br /> MW-2 10/20/97 3.4 1.2 1.8 110 235.5 ND <br /> MW-3 2/25/97 ND ND ND ND ND ND <br /> MW-3 10/20/97 ND ND ND ND ND ND <br /> DUP 10/20/97 ND ND ND ND ND ND <br /> jMW-4 10/20/97 1.6 11 1.8 20 89.1 ND <br /> Detection Limits 0.1 0.5 1.0 1.0 1.0 5-10 <br /> Notes: <br />' TPH =Total Petroleum Hydrocarbons (Carbon Range C5-C8) <br /> MTBE= Methyl-tert-butyl ether <br /> ND=Not Detected at the listed detection Iimits <br /> DUP-Duplicate sample. <br /> • Concentrations are reported in micrograms per liter (ug/1) which is equivalent to parts <br /> per billion (ppb) expect for TPH-g which is reported in milligrams per liter (mg/1), <br /> which is equivalent to parts per million (ppm). <br /> • Analyses for TPH-g were performed in accordance with California Department of <br /> Health Services Method(8015 Modified- Simulated Distillation). <br /> • Analyses for BTEX/MTBE were performed in accordance with Environmental <br /> 1 Protection Agency Method 8020. <br /> 197501 - Stockton <br />