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4 <br /> TABLE 2 <br /> AIR SAMPLING RESULTS <br /> SOIL VENTING SYSTEM WITH THERMAL/CATALYTIC OXIDIZER <br /> 620 CHARTER WAY, STOCKTON, CA <br /> Date Units Benzene Toluene Ethyl Total TPH as <br /> benzene Xylenes Gasoline <br /> 9/17/92 Influent ppmv 1100 1000 130 460 9900 <br /> Effluent ppmv 1 3 2 5 042 2 3 7 8 <br /> 10/1/92 Influent ppmv 390 150 1100 830 14000 <br /> Effluent ppmv 0 25 042 049 1 6 nd(<1 4) <br /> 1/7/93 Influent ppmv 18 22 3 23 1 100 <br /> Effluent ppmv 0 63 032 0 12 038 11 <br /> 419/93 Influent ppmv 7 5 24 4 2 47 1200 <br /> Effluent ppmv 0 14 029 0 069 0 61 12 <br /> 6/10/93 Influent mg/m3 2 6 66 31 290 1700 <br /> Effluent Not sampled <br /> 7/13/93 Influent ppmv ndi<0 0161 6 1 2 5 24 310 <br /> Effluent Not sampled <br /> 813193 Influent ppmv ndi<0 0161 4 5 3 26 220 <br /> Effluent Not sampled <br /> 9/1193 Influent ppmv ndf<0 0161 2 4 2 1 17 200 <br /> Effluent Not sampled <br /> ppmv = parts per million by volume <br /> mglm_3 = milligrams per cubic meter <br />. nd = not detected at laboratory method detection limit <br />