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1 ' Quarterly Monitoring Report July 2000 Canepa's Car Wash(Pacific Avenue) Page -4 also analyzed for methyl tertiary-butyl ether (MTBE) and for benzene, toluene, ethyl benzene, and total xylenes (BTEX) by EPA Method 8021B ' Laboratory analyses indicate that none of the analytes of interest were detected at or above the laboratory reported detection lamas in the groundwater samples collected from monitor wells MW-5 through MW-8 BTEX and MTBE were detected in the groundwater sample collected from monitor well MW-1 at concentrations of 400 micrograms per liter (µg/L), 110 µg/L, 49 µg/L, 86 µg/L, and 330 µg/L, respectively TPH-G was detected in the groundwater sample collected from MW-I at a concentration of 0 66 milligrams per liter (mg/L) BTEX and MTBE were detected in the groundwater sample collected ' from monitor well MW-2 at concentrations of 64,000 gg/L, 3,500 gg/L, 2,400 gg/L, 8,800 4g/L, and 350 µg/L, respectively TPH-G was detected in the groundwater sample collected from MW-2 at a concentration of 71 mg/L MTBE was detected in the groundwater sample collected from MW-3 at a ' concentration of 6 7 gg/L Toluene and TPH-G were detected in the groundwater sample collected from monitor well MW-4 at concentrations of 1 8 µg/L and 0 10 mg/L, respectively BTEX and MTBE were detected in the groundwater sample collected from soil vapor extraction well SV-4 at concentrations of ' 560 µg/L, 110 µg/L, 34 gg/L, 60 µg/L and 46,000 gg/L respectively TPH-G was detected in the groundwater sample collected from SV-4 at 0 8 mg/L A summary of the laboratory analytical results is presented in Table 2 (below) and in Figure 3, Appendix A Laboratory report sheets indicating analytical methods used, detection limits, and the results of the analyses are included in Appendix C Historical groundwater analyses are presented in Table A, Appendix B lie TABLE 2 LABORATORY ANALYTICAL RESULTS (JULY 2000) B T E X TPH-G MTBE Detection limits 03 03 03 06 005 l 0 Monitor Well I D pq/L ltg/L lig/L 4g/1 mg/L lig/L 1707-MW1-7/11/00 400 110 49 86 066 330 1707-MW2-7/11/00 64,000 3,500 2,400 8,800 71 350 1707-MW3-7/1 1/00 ND ND ND ND ND 67 1707-MW4-7110/00 ND 1 8 ND ND 010 ND 1707-MW5-7/10/00 ND ND ND ND ND ND 1707-MW6-7110/00 ND ND ND ND ND ND 1707-MW7-7111/00 ND ND ND ND ND ND I— ---a-7/i0/00 ivD ND ND ND ND ND 1707-5V4-7/11/00 560 110 34 60 08 46,000 Unit Conversions Analytical_ • µg/1-parts per billion(ppb) B,T,E X=benzene,toluene,ethyl benzene,and total xylenes mg/L parts per tnillton(ppm) TPH-G=total petroleum hydrocarbons,quantified as gasoline MTBE=Methyl tertiary Butyl Ether ND�not detected at or above the laboratory reported detection limit CONDOR