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E <br /> i <br /> Table 2 , continued <br /> t TPH-D TPH-G B T E X TOG <br /> Sample No . (ppb) {,ppb) (ppb) (ppm) <br /> SBR-$ 200 ;, <br /> 600 N.D. N.D. N .D. N.D. N . D. <br />€ �SBR- 87 , 000 1 , 100 , 000 690 460 5500 13000 N.D. <br /> SBR--10 800 :5 ,000 N.D. N .D. 290 42 N . D. <br /> --------------------------------------------------------- <br /> Method <br /> Detection 50 ;50 0 . 2 0 . 2 0 . 2 0 . 6 4 <br /> Limit <br /> -------------------------------------------------------_----_-- <br /> TPH-D. . . Total Petroleum Hydrocarbons as Diesel <br /> TPH-G. . .Total Petroleum Hydrocarbons as Gasoline <br /> BTEX. . . Benzene, toluene, ethylbenzene, total xylenes <br /> i <br /> TOG. . . Total Oil and Grease (non-polar) <br /> ppb. . . Parts per billion <br /> N.D. . . .Not detected above indicated method detection limit <br />} As shown, the highest 1`evels of contamination of both soil <br /> and groundwater are located in the Northwest quadrant of <br /> I` the site with an apparent point source at/near boring SBR- <br /> 9 . <br /> XOn February 2 , 1994 , exploratory trenches were excavated to <br /> the south and west of boring SBR-9 in an effort to locate <br /> the point source. Approximately 40 cubic yards of <br /> malodorous soil was detected, excavated, and stored on site <br /> pending treatment . <br /> On the same date, a second trench as excavated along the <br /> western boundary of the site to determine if contamination <br /> had migrated to the west to the extent that it threatened <br /> to move off site in that direction. Discrete soil samples <br /> acquired from the "boundary" trench and submitted for <br /> ertified laboratory analyses were found to be free of <br /> detectable concentrations of target analytes with the <br /> exception of one sample that contained oil and grease <br /> (which, we believe, resulted from the presence of bits of <br /> asphalt pavement) . <br /> Page 5 <br />