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1 - <br /> ' Report of Findings <br /> Frontier Transportation, Inc. <br /> ' August 31, 2005 <br /> Page 4 <br /> to 20' bgs The annular seal was one foot thick and consisted of bentonite pellets The remaining <br /> annular space was grouted to surface with a Portland cement and potable water mixture Ends of <br /> the screen and riser sections were constructed with flush-joining threaded fittings to ensure leak- <br /> proof unions (See Appendix A for well construction) <br /> Soil samples were collected at 5-foot intervals from a split spoon sampler that contained <br /> ' three brass liners, which were 2 inches in diameter and 6 inches long Soil samples were screened <br /> for petroleum hydrocarbons m the field using a Mind;AF 2000 PID (Model PGM7600) <br /> photoionization detector(PID) A total of twleve (12) soil samples were collected from newly <br /> ' installed monitoring wells MW_19, MW-20 and MW-21 Four samples were taken for each well <br /> at depths of 5', 10', 15' and 20' bgs All samples were analyzed for TPH-g (C4-C 12), BTEX, <br /> and MTBE, TBA, DIPE, ETBE and TAME using EPA methods 8015M and 8260B as requested <br /> by the PHS/EHD <br />' Laboratory analysis results identified MTBE in a total of four soil samples out of the <br /> twelve samples analyzed MTBE was identified in the shallow soil from 10' to 20' bgs, with a <br /> maximum of 0 733 mg/kg(MW-21 @ 15') No MTBE was detected at 5' bgs MTBE <br /> attenuated vertically at the 20' bgs termination depth in all wells to non-detect for MW-19 and <br /> MW-20 and to 0 009 mg/kg in MW-21 See Table 1 below for Soil Sample Results and <br /> Appendix B for Laboratory Analytical Reports <br />' Table I Soil sample results for August 2005 usingEPA <br /> Methods 8015 and 8260 (ppm or mg/kg) <br /> Well ID Sample TPH-g Benzene Toluene Ethylbenzene Xylenes MTBE <br /> r Depth (ppm} (ppm) Win) Win) (ppm) (Ppm) <br /> MW-19 5 0.6 - <0 002 <0 002 <0 002 <0 004 <0 005 <br />' 10 217 . <0 002 <0 002 4.66 2.27 0.307 <br /> 15 <0 5 - <0 002 <Q 002 <0 002 <0 004 <0 005 <br /> 20 <Q 5 ' <0 002 <0 002 _<0002 <0 004 <0 005 y <br />' MW-2Q 5 <0 5 <0 002 <0 002 <0 002 <0 004 <0 005 <br /> 10 <O 5 <0 002 <0 002 <0 002 <0 004 __:<0_005 <br />' 15 <0 5 - <0 002 <0 002 <0 002 <0 004 0.227 <br /> M20 <br /> <0 5 <0 002 <0 002 <0 002 <0 004 <0 005 <br /> <0 5 <0 002 <0 002 <0 002 <0 004 <0 005 <br />' 21-1 1.08 <0 002 3.75 7.90 <0 005 <br /> 0.7 <0 002 <0 002 <0 002 <0 004 0.733 <br /> <0 5 0.004 0.004 0.010 0.040 0.009 <br /> • <br /> 1 <br />