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TABLE 4 <br /> AIR SPARGING TEST <br /> BENZENE ANALYTICAL RESULTS OF GROUND-HATER SAMPLES <br /> ARCO Service Station No 2130 <br /> F-E <br /> 7906 North El Dorado Street <br /> Stockton, California <br /> October 12, 1992 December 22 1992 <br /> Time AS-1 MS-1 MS-2 MS-3 QS Time AS-1 M5-1 MS-2 Md <br /> 11 00 12 -- 460 160 0 10 30 13 280 8 0 <br /> 14 30 0 96 83 26 4 <br /> 14 30 820 2,500 1,400 15 15 00 1 5 -- -- <br /> 17 30 c0 50 82 2 7 1,100 20 <br /> 16 30 -- 520 -- -- 2118 00 <0 50 <br /> -- -- -- <br /> Distance from 9 9 19 5 Distance from 9 9 19 5 <br /> AS-1 (ft ) AS-1 (ft ) <br /> Notes <br /> Analytical results in parts per billion (ppb) <br /> = Not sampled or not analyzed <br /> 0 = Air sparging flow rate (ACFM) <br /> ACFM = Actual cubic feet per minute <br /> 30003-8 <br />