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w � <br /> Woodward•C[yde <br /> Table 1. TPH and BTEX in Soil Gas (in ppb) a1 the Caltrans Shop 10 Facility, in Stockton, <br /> California. <br /> Location Depth (feet) Benzene Toluene Total Xylenes Total Hydro <br /> carbons <br /> P1 7 5,000 16,000 11,000 300,000 <br /> P2 7 180 470 400 4,300 <br /> P3 7 <0.5 19 <1.0 270 <br /> P4 7 2.1 2.5 2.0 52 <br /> P5 7 2.0 10 9.4 56 <br /> 11 <0.5 <0.5 41.0 <50 <br /> P6 7 3.4 5.5 4.5 <50 <br /> 11 <0.5 <0.5 <1.0 <50 <br /> P7 7 20 16 4.5 280 <br /> 11 <0.5 <0.5 <0.5 790 <br /> P8 <0.5 <0.5 <0.5 <1.0 <50 <br /> P9 7 0.87 1.8 2.9 <50 <br /> . 1 1 <0.5 0.93 <1.0 <50 <br /> P10 21 <0.5 0,51 <1.0 <50 ; <br /> P 11 2 1 <0.9 <0.9 <1.8 220 <br /> 27 <0.9 0.81 <1.0 700 <br /> 33 <0.9 39 14 21,000 <br /> P12 21 <1,5 <1.5 <3.0 <150 <br /> 27 <1.5 <1.5 <3.0 <100 <br /> P13 21 <0.5 <0.60 <1,0 <50 <br /> P 3 27 <0.5 <0.5 10.5 430 <br /> P13A 32 <0.5 14 <1.0 4500 <br /> P14 2 1 <0.5 z.0.5 <1.0 <50 <br /> 2 7 <0.5 <0,5 <1.0 <50 <br /> 3 3 <0,5 <0.5 <1.0 <50 <br /> i <br /> 4 0 <0.5 <0.5 <1.0 <50 <br /> i <br /> 4 <br />