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results are summarized in Table 4 : <br /> f Table 4-- Analytical Results of Groundwater Samples <br /> Acquired from Wells MW-1 , MW-2, and MW-3 <br /> During July, 1992 <br /> ' Well TPH-D TPH-G B <br /> T E X COs <br /> No. (ppb) (ppb) (ppb) 17%7-%1%1 <br /> ' MW-1 N.D. 910 6 .8 2 .8 5. 1 29 N.D. <br /> ' MW-2 N.D. N.D. N.D. N.D. N.D. N.D. N.D. <br /> MW-3 N.D. 780 8 .2 3 . 5 6 . 6 19 N.D. <br /> Method -------------------------------- <br /> Detect 50 50 0 . 5 0. 5 0. 5 0 .5 0. 5 <br /> Limit <br /> ------------------------------------------------------------ <br /> Analyses were also conducted for Total and Fecal Coliforms with <br /> the following results (Method Detection Limit- 2 . 2 ) : <br /> Total Coliforms Fecal Coliforms <br /> MW-1 >16/100 ml <2. 2/100 ml <br /> Mw-2 2 . 2/100 ml <2 .2/100 ml <br /> ' Mw-3 2 . 2/100 ml 2. 2/100 ml <br /> TPH-D. . .Total Petroleum Hydrocarbons as Diesel <br /> TPH-G. . .Total Petroleum Hydrocarbons as Gasoline <br /> BTEX. . .Benzene, toluene, ethylbenzene, xylenes <br /> HVOs. . .Halogenated Volatile Organic Compounds <br />' <br /> N.D. . . .Not detected at or above laboratory detection limits <br /> ppb. . .Parts per billion ( 1000 ppb = 1 ppm) <br /> CONCLUSIONS AND RECOMMENDATIONS <br /> Uri.ah ' s investigation has confirmed the presence of significant <br /> fuel hydrocarbon contamination in soil ( 50-5, 000 ppm TPH-G and <br /> 47 to 2,200 ppm TPH -D) over a 10 foot vertical interval between <br /> 20 and 30 feet bgs in EB-8 (which is located in the eastern <br /> part of the site near the entrance drive) ; and over a 10 foot <br /> interval between 15 and 25 feet bgs in EB-11 in the western <br /> part of the site near the area formerly occupied by underground <br /> fuel storage tanks. 1 ,600 to 11 , 000 ppm TPH-G and 600-2, 400 <br /> ppm TPH-D were present in soil samples acquired from EB-11 . <br /> 7. <br /> t <br />