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TABLE 6 <br /> HISTORIC RESULTS FOR SOIL GAS SAMPLES COLLECTED DURING PREVIOUS INVESTIGATIONS -VOCs <br /> PG&E Former Tracy MGP Site <br /> Tracy, California <br /> d <br /> m r <br /> ami a=i <br /> N � <br /> C <br /> d d <br /> � � O <br /> Previous Sample Depth <br /> Sample ID Investigation Location Matrix (feet bgs) Sample Date m ao 0 <br /> y o <br /> �a <br /> Z <br /> a � <br /> m <br /> a <br /> ppm ppm VS VS <br /> V1 SVA A3 Soil Gas 3 6/24/1987 ND<1.00 ND<1.00 ND<1.00 ND<1.00 <br /> V1/13 SVA A3 Soil Gas 5.5 6/24/1987 ND<1.00 ND<1.00 ND<1.00 ND<1.00 <br /> V1/C SVA A3 Soil Gas 8 6/24/1987 ND<1.00 ND<1.00 ND<1.00 ND<1.00 <br /> V1/D SVA A3 Soil Gas 9.5 6/24/1987 ND<1.00 ND<1.00 ND<1.00 ND<1.00 <br /> V2 SVA A3 Soil Gas 7.5 6/24/1987 1000 900 11600 3000 <br /> V3 SVA A3 Soil Gas 7.5 6/24/1987 ND<1.00 ND<1.00 ND<1.00 ND<1.00 <br /> V4 SVA A3 Soil Gas 7.5 6/24/1987 ND<1.00 ND<1.00 ND<1.00 ND<1.00 <br /> V5 SVA 133 Soil Gas 7.5 6/24/1987 7.00 10.0 14.0 25.0 <br /> V6 SVA B3 Soil Gas 7.5 6/24/1987 ND<1.00 ND<1.00 ND<1.00 ND<1.00 <br /> V7 SVA A3 Soil Gas 7.5 6/24/1987 5.00 100 160 170 <br /> V8 SVA B3 Soil Gas 7.5 6/24/1987 ND<1.00 ND<1.00 ND<1.00 ND<1.00 <br /> V9 SVA A3 Soil Gas 7.5 6/24/1987 ND<1.00 ND<1.00 ND<1.00 ND<1.00 <br /> V10 SVA A3 Soil Gas 7.5 6/24/1987 ND<1.00 ND<1.00 ND<1.00 ND<1.00 <br /> V11 SVA A2 Soil Gas 7.5 6/24/1987 ND<1.00 ND<1.00 ND<1.00 ND<1.00 <br /> V12 SVA A2 Soil Gas 7.5 6/24/1987 ND<1.00 ND<1.00 ND<1.00 ND<1.00 <br /> V13 SVA Off-Site Soil Gas 7.5 6/24/1987 ND<1.00 ND<1.00 ND<1.00 ND<1.00 <br /> Note: Samples analyzed in the field using a portable gas chromatograph <br /> SVA = Draft Soil Vapor Assessment at the Pacific Gas and Electric Company Service Center, Tracy, CA (PG&E, July 1987) <br /> Values in BOLD text are detected concentrations above the reporting limit <br /> ND< = Non Detect at Reporting Limit <br /> ppm = parts per million <br /> VS = Volt-Seconds Page 1 of 1 <br />