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I <br />' Table 2. Groundwater Sample Results from Quarterly Monitoring Dated 20 April 2000. <br /> . Sample TPH- TPH- Motor2 2 2 Ethyl Total <br /> ID Gasoline' Diesel° 011s3 MTBE Benzene Toluene Benzene2 Xylenes <br /> r MW-1 ND 330 ND ND ND ND 00006 0.0007 <br /> MW-2 028 1.4 120 0.0045 0.0026 0.0034 0.001 0.0082 <br />` MW-3 ND SO ND ND ND ND ND ND <br /> Notes All results shown in ppm <br /> I 'Detection limits for analyses on this sample were 0 05 ppm <br /> 213etection linuts for analyses on this sample were 0 0005 ppm <br /> I ;Detection linuts for analyses on this sample were 1 ppm <br /> "Diesel detection limit 0 5 ppm <br /> ND=Not detected at or above the indicated laboratory detection linut <br /> f <br /> Grab samples from MW-1 and MW-3 were collected on 22 December 1999 after well <br /> h <br />! development and purging of the monitoring wells as descnbed in the Work Plan dated 28 <br /> January 1999 and the Report of Investigation dated 3 February 2000 The results of the <br />► laboratory analyses on two groundwater samples are presented in Table 3 below <br /> f TPH-Diesel was present in both groundwater samples at concentrations of 310 ppm and 110 <br /> i ppm Ethylbenzene and xylenes were also found in MW-1, which is located at the former UST <br /> r <br /> diesel location <br /> Table 3. Groundwater Sample Results from Report of Investigation Dated 3 February 2000 <br /> Sample TPH- TPH- Motor 2 2 2 Ethyl Total <br /> r ID Gasoline' Diesel' 011s3 MTBE Benzene Tolucne Benzene Xylene <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 limits for analyses on this sample were 0 05 ppm <br /> 2Detection limits for analyses on this sample were 0 0005 ppm <br /> 3Detection limits for analyses on this sample were 1 ppm <br /> °Diesel 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 /> These data show relatively moderate levels of MTBE, BTEX and gasoline contamination in the <br /> • <br /> EnvIroneering,Inc. Project No 00-005 06 Page 4 <br />