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C�colo icalTecfuticslac. Page 9 <br /> Dual Phase Extraction Pilot Test Report <br /> Project No 723 2 <br /> November 12,2004 <br /> Well Date Benzene Toluene Ethyl Total TPH <br /> MW-9 u L uSLL Benzene X Eenes Gasoline <br /> t u /L u -/L u /L <br /> 03/19/04 25,400 9,210 3,640 14,000 137,000 <br /> ' 04/02/04 24,500 8,270 2,0201 <br /> 4,500 117,000 <br /> 04/16/04 13,200 2,220 5,260 7,770 64,000 <br /> 04/28/04 17,400 4,420 6B3 8,630 67,900 <br /> 05/14/04 13,800 3,820 928 6,810 67,900 <br /> ' 05/26/04 13,900 3,830 983 7,150 71,000 <br /> 920 06/11/04 15,900 5,890 1,280 6,930 101,000 <br /> 1340 06/11/04 445 140 481 186 2,100 <br /> ' 920 066/25/04 12,100 3,690 907 5,750 60,400 <br /> a 1 1305 06/25/04 240 736 203 690 1,170 <br /> 07/D8/04 127400 3,930 946 5,980 61,600 <br /> The contaminant concentrations in MW-9 declined significantly on both days after the ozone <br /> was injected The concentrations after each event then rebounded in the well as indicated in <br /> ' the table Wells GP-1 through GP-3 were not sampled immediately after the ozone injections <br /> however GP-2 and GP-3 did not experience declines in containinant concentrations after June <br /> 11 This suggests that the ozone did not reach these wells <br /> 5.2 Radius of Influence <br /> ' Wells GP-1, GP-2 and GP-3 were installed approximately 12, 24 and 48 inches from well <br /> MW-9 as illustrated in the photograph below <br /> 1 <br />