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Mr Chuck Carmel <br /> February 18, 1992 <br /> Page 9 <br /> Table 2. Laboratory Results, ARCO Station 2093, <br /> Tracy, California, December 16, 1991 <br /> Well number <br /> Constituent ATR-2 ATR-3 ATR-4 ATR-5 <br /> Benzene, Pg/la 6 480 300 35 <br /> ppm"" 14 113 709 83 <br /> Toluene, pg/l <0.5 250 22 31 <br /> ppmVV <0.12 64 5.6 7.9 <br /> Total xylenes, Pg/l <0 5 150 49 52 <br /> <0.11 33.5 10.9 11.6 <br /> Ethylbenzene, }ig/l 0.7 79 38 25 <br /> Ppmvv 0.16 17.6 8.5 5.6 <br /> Total petroleum hydrocarbons <br /> as gasoline, pg/1 640 23,000 7,500 2,500 <br /> PPM 151 5,440 1,774 591 <br /> Chloroform, ppmvv 021 — -- — <br /> 1,2-Dichloroedme, Fm,,, 0.024 — — -- <br /> Orgamc lead, pgc — — <1 -- <br /> Pg/id -- — <0.02 -- <br /> aMicrograms per Inter of air. <br /> bParts per milleon of vapor volume. <br /> CNEcrograms. <br /> dThuty liters of soil vapor were passed through each sample. <br /> Brown and Caldwell 6461\c0xtXsP'6wi-o4 III <br /> Consultants <br />