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Table 4 : May 2002 Soil Boring Sample Analysis Results -EPA Methods 8015-gas , 8021 B , and 8260B <br /> Well No, Depth TPH-a-a a I E X MTBE MTBE* <br /> MW-3R 15' t < 1 <2 < 1 < 1 <2 53 78 <br /> 20' < 1 6 < 1 <3 <3 88 170 <br /> MW- 12 5' <1 < 1 <1 <1 <2 <25 NA <br /> 10' <1 < 1 < 1 < 1 <2 <25 NA <br /> 15' < 1 < 1 < 1 < 1 <2 <25 NA <br /> 20' < 1 < 1 < 1 < 1 <2 <25 NA <br /> 25' < 1 < 1 < 1 <1 <2 <25 NA <br /> 30' < 1 < 1 < 1 < 1 <2 <25 NA <br /> 40' <1 < 1 < 1 < 1 <2 <25 NA <br /> MW-13 5' 2 64 9 17 14 2,500 29000 <br /> 10' 700 11 ,000 24,000 17 ,000 631000 379000 251000 <br /> 15' < 1 <2 <4 <3 8 81 210 <br /> 20' < 1 47 X43 21 76 190 45 <br /> 25' < 1 5 14 7 25 40 49 <br /> 30' < 1 <3 5 <3 7 37 140 <br /> 40' < 1 <2 <3 <2 5 <25 11 <br /> Units mg/kg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg <br /> MTBE'= MTBE by EPA Method 826013. <br />