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i <br /> Table 1. Summary of Detected Constituents From Extraction System, ARCO Station 2133, Stockton <br /> . EPA 625 <br /> TPH/gas and volatile organics, pg/1 (extractable) <br /> EPA Method 8015/8020 EPA 624 (purgeable organics, pg/l organics), pg/1 <br /> Date TPH as I Copper, Lead, Zinc, <br /> sampled Benzene Ethylbenzene Toluene xylenes gas Benzene Ethylbenzene Toluene Xylenes Napbthalenel mg/1 mg/1 mg/1 <br /> 4118/91 590 74 150 290 3,100 0 021 <0 05 012 <br /> 4/30/91 440 27 160 290 13 <br /> 6111/91 190 22 120 110 1,300 <br /> 626/91 48 38 18 23 280 f Oil 0 050 024 <br /> 7110/91 30 24 15 22 300 � 0 03 0 010 0 14 <br /> 7/24/91 37 22 19 27 370 <br /> 8/1/91 35 10 12 19 <50 t <br /> 8/21/91 56 38 26 47 280 ; 014 0 079 14 <br /> 9/11/91 12 <0 5 20 <0 5 <50 } <br /> E, <br /> 925/'91 31 0 5 12 20 170 1 Oil 0 057 026 <br /> 10/9/91 25 06 88 15 150 <br /> 1023/91 24 17 81 15 130 058 0 056 042 <br /> 1116/91 14 <05 <0 5 28 X50 <br /> 118192 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 /> y <br /> i 2/26/92 32 17 38 110 1,300 <br /> 3/11/92 100 55 35 160 1,600 001 <0 05 003 <br /> 325/92 100 17 47 140 1,300 <br /> 4/8/92 92 22 65 140 1,500 00073 <0 025 0 023 <br /> 4/22/92 97 13 48 110 1,000 <br /> 6/1/92" <0 3 <0 3 <03 <0 3 X30 : <br /> 6/10/92 75 80 24 56 560 0 019 <0 005 0 032 <br /> "Sample was collected within 1/2-hour of system start-up and is most likely not a representative sample <br /> s <br /> 6673�CORRESPATABLZ 1 <br />