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Table 1. Summary of Detected Constituents From Extraction System, ARCO Station 2133, Stockton <br /> TPH/gas and volatile organics, pgll <br /> EPA Method 80158020 <br /> pH field <br /> Date sampled measurement Benzene Ethylbenzene Toluene Xylenes TPH as gas Copper Cadmium Nickel, <br /> 1/13/93 -- 57 23 088 73 760 0 011 -- -- <br /> 1/27/93 14 <0 5 <0 5 170 1,400 -- <br /> 2/10/93 -- 190 22 63 210 1,600 0 031 -- -- <br /> 2/24/93 2 <0 3 05 <0 5 160 -- -- -- <br /> 3/10/93 -- 89 1 21 160 1,100 <0 01 -- -- <br /> 4/14193 713 85 5 18 180 1,500 -- -- -- <br /> 5/25/93 68 120 16 36 190 1,100 <0 01 0 006 0 010 <br /> Volatile organics, pg/1 <br /> EPA Method 624 Biochemical oxygen <br /> demand, mg/1 <br /> Date sampled Benzene Ethylbenzene Toluene Xylenes EPA Method 405 1 <br /> 5/25/93 86 13 26 160 0 85 <br /> 7d';*^('1RRPCATART F 1 <br />