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i <br /> Table 4 <br /> ' Summary of Reduction of Constituent Levels <br /> June 1998 to June 1999 <br /> 1 Benzene Toluene Ethyl Total TPH-Gas <br /> lig/L �tg/L Benzene Xylenes m /L <br /> µg/L µgr- $ <br /> , 6/19/98 3500 3300 890 2700 37 <br /> 9/22/98 680 150 130 3000 17 <br /> Percent Decrease <br /> Between Sampling 80.57% 95.45% 85.39% -11.11% 54.05% <br /> ' Events <br /> 9/22/98 680 150 130 3000 17 <br /> ' 12/18/98 420 10.4 36 300 8.4 <br /> Percent Decrease <br /> Between Sampling 38.24% 93.07% 72.31% 90.00% 50.59% <br /> ' Events <br /> 12/18/98 420 10.4 36 300 8.4 <br /> '.. 3/16/99 300 5 46 85 4.5 <br /> Percent Decrease <br /> Between Sampling 28.57% 51.92% -27.78% 71.67% 46.43% <br /> Events <br /> 3/16/99 300 5 46 85 4.5 <br /> 6/15/99 150 5.3 22 18 3.8 <br /> Percent Decrease <br /> Between Sampling 50.00% -6.00% 52.17% 78.82% 15.56% <br /> Events <br /> ' 6/19/98 3500 3300 890 2700 37 <br /> 6/15/99 150 5.3 22 18 3.8 <br /> ' Overall Percent 95.71% 99.84% 97.53% 99.33% 89.73% <br /> Decrease <br /> Note: Negative numbers denote increases. <br /> American Geological Service, Inc. <br /> CA95DE-029 11 <br />