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F <br /> • Table 1. Summary of Detected Constituents From Extraction System, ARCO Station 2133, Stockton <br /> EPA 625 <br /> TPH/gas and volatile organics, pg/l (evadable) <br /> EPA Method 8015/8020 EPA 624 (purgeable organics, pg/l organics), pgn <br /> Date TPH as Copper, Lead, Zinc, <br /> sampled Benzene Ethylbenzene Toluene Xylenes gas Benzene Ethylbenzene Toluene Xylenes Naphthalene mg/1 mg/l in94 <br /> 4/18191 590 74 150 290 3,100 0 021 <0 05 0.12 <br /> 4/30/91 440 27 160 290 13 <br /> 6/11/91 190 22 120 110 1,300 <br /> 6/26/91 48 3 8 18 23 280 Oil 0 050 0 I <br /> 7/10/91 30 24 15 22 300 <br /> 7/24/91 37 22 19 27 370 003 0 010 010 <br /> 8/7/91 35 10 12 19 <50 <br /> 821/91 56 38 26 47 280 014 0 079 14 <br /> 9/11/91 12 <0 5 20 <0 5 <50 <br /> 9/25/91 31 05 12 20 170 Oil 0 057 0.26 <br /> 10/9/91 25 06 8 8 15 150 <br /> 10/23/91 24 17 81 15 130 058 0 056 042 <br /> 11/6/91 14 <0 5 <0 5 28 <50 <br /> 1/8/92 67 15 36 100 930 73 13 33 100 <1 6 <0 02 <0 002 0 037 <br /> 1/22/92 74 11 27 71 840 <br /> 2/12/92 15 <0 5 09 <0 5 X50 <0 02 0 027 006 <br /> 2/26/92 32 17 38 110 1,300 { �' <br /> 3/11/92 100 55 35 160 1,600 001 <0 05 003 <br /> 3/25/92 100 17 47 140 1,300 <br /> 4/8/92 92 22 65 140 1,500 i 00073 <0 025 0 023 <br /> 4/22/92 97 13 48 110 1,000 <br /> 6/1/92a <0 3 <0 3 <0 3 <0 3 <30 <br /> 6/10/92 75 80 24 56 560 I ! 0 019 <0 005 0 032 <br /> 6/24/92 100 94 33 100 940 <0 01 <br /> 7/8/92 32 0 8 32 33 380 <0 1 0 023 <br /> 7/.22/92 22 <0 50 4 3 14 180 <br /> 8/12/92 094 054 <0 50 12 170 <0 010 <0 10 018 <br /> 8/26/92 8 6 044 1 1 95 150 <br /> 9/9/92 25 13 23 95 160 <0 010 <0 10 0 039 <br /> 'Sample was collected within 1/2-hour of system start-up and is most likely not a representative sample <br /> i <br /> t <br /> i <br /> 6673�MRRESP%TAS 3 <br />