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Table 1. Results of Soil Vapor Sampling <br /> ARCO Station 2133, Stockton, California <br /> Well number and sample date <br /> E-5 E-10 E-11 <br /> Constituent 2/24/92 2/24/92 2/24/92 <br /> Benzene <br /> µg/1 --d 450 1,700 <br /> ppmvy a --d 139 524 <br /> Ethylbenzene <br /> µgll --d 260 120 <br /> PPm a --d 59 27 <br /> Toluene <br /> µg/l --d 600 570 <br /> ppm a --d 156 149 <br /> Xylenes <br /> µg/1 --d 1,100 1,100 <br /> ppm a --d 250 250 <br /> TPH-Gb <br /> µg/1 --d 14,000 35,000 <br /> ppmvv a --d 3,360 8,402 <br /> Organic Lead <br /> µg 087 045 --d <br /> Pg/lc 0 029 0 015 --d <br /> Dichloromethane <br /> PPm a --d 22 380 <br /> 1,2-Dichloroethane <br /> ppmwa --d 14 230 <br /> Tetrachloroethene --d NDe 0 760 <br /> aParts per million of vapor volume <br /> bTPH-G = total petroleum hydrocarbons as gasoline <br /> cLead concentration is based on 30 liters of vapor flow through sample <br /> dTest was not performed at this well <br /> cND = not detected <br /> 674741EPMTS�6747-04 LTR <br />