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• TPH-Diesel was present in both groundwater samples at concentrations of 310 ppm and 110 <br /> ppm Ethylbenzene and xylenes were also found in MW-1, which is located at the former UST <br /> diesel location <br /> Table 6 Groundwater Sample Results from Report of Investigation Dated 3 February 2000 <br /> Sample TPH- TPH- Motor z z 2 Ethyl Total <br /> ID Gasoline' Diesel` 0.112MTBE Benzene Toluene Benzene2 Xylenes <br /> MW-1 ND 310 ND ND ND ND 0.0025 0.004 <br /> MW-3 ND 110 ND ND ND ND ND ND <br />. Notes All results shown in ppm <br /> 'Detection linuts for analyses on this sample were 0 05 ppm <br />. 213etection linuts for analyses on this sample were 0 0005 ppm <br />. 313etection limits for analyses on this sample were 1 ppm <br /> 4Diesel detection limit 0 5 ppm <br />. ND=Not detected at or above the indicated laboratory detection limit <br /> The following table from the Sierra Pacific report completed in 1997 is included here to provide <br />! information regarding the extent of contamination at the site <br /> 1b <br /> These data show relatively moderate levels of MTBE, BTEX and gasoline contamination in the <br /> groundwater samples from MW-2 and all bore holes Some of the groundwater samples showed <br /> contamination from oil However, since the sampling in 1997, oil has reached groundwater in <br /> MW-2 as evidenced by significant floating oil present in September 1998, December 1999, <br />. January 2000 and April 2000 Since that time floating oil has been removed and reduced <br />. significantly <br /> s <br />. Table 7 Sierra Pacific Groundwater Sample Results from Report of Investigation Dated 4 February 1997. <br /> Sample ID I MTBE I Benzene Toluene Eth lbenzene2X lenem' THP-S' I TOG3 <br /> B-1 NA NA NA NA NA NA NA <br />. B-2(MW-2) 1.59 00094 ND 00003 0.0013 0.361 ND <br /> B-3 0 925 0.273 00015 00008 00035 0 359 NA <br /> B-4 1.58 0.0015 ND ND ND 0.157 NA <br />• Notes All results shown in ppm <br /> 'Detection limits for analyses on this sample were 0 05 ppm <br /> 2Detection limits for analyses on this sample were 0 0005 ppm <br /> 313etection limits for analyses on this sample were 1 ppm <br />. ND=Not detected at or above the indicated laboratory detection limit <br />• NA= Sample was not analyzed <br /> All groundwater samples secured by EI were analyzed for total petroleum hydrocarbons as <br /> Environeenng,inc Project No 01-00109 Page 7 <br />