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Quarterly Monitonng Report,October,1999 Canepa's Car Wash(Park Street) November 15, 1999 Page 3 TABLE 1 GROUNDWATER ELEVATION DATA (OCTOBER 14, 1999) MW-1 THROUGH MW-7 Well Well Casing Well Collar Depth to Groundwater ID Screen Elevation Water Elevation Interval (feet) (feet) (feet) (feet- bgs) MW-1 45 -65 1097 2328 -1231 MW-2 45 -65 1037 2404 -1367 MW-3 45-65 1176 2448 -1272 MW-4 40-60 1085 2284 -1199 MW-5 40-60 1125 2419 -1294 MW-6 40-60 1172 2424 -1252 MW-7 40-60 1105 2361 -1256 4,2 Laboratory Analyses (TPH-G,BTEX, Oxygenates/Additives) The groundwater samples were analyzed by GeoAnalytical Laboratories, Inc for total petroleum hydrocarbons quantified as gasoline (TPH-G) by Method 5030/LUFT, for benzene, toluene, ethyl benzene, and total xylenes (BTEX) by EPA Method 602, and for selected gasoline oxygenates/additives by EPA Method 8260 The gasoline oxygenates/additives include methyl tertiary-butyl ether (MTBE), ethanol, tertiary-butanol, di- isopropyl ether(DIPE), ethyl tertiary-butyl ether(ETBE), and tertiary-amyl miethyI ether(TAME) Laboratory analyses indicate that none of the analytes of interest were detected at or above the Iaboratory reported detection limits in the groundwater sample collected from monitor well MW-4 Toluene and TPH-G were detected in the sample collected from monitor well MW-1 at concentrations of 0 6 micrograms per liter (µg/l) and 0 06 milligrams per liter (mg/1), respectively BTEX and TPH-G were detected in the sample collected from monitor well MW-2 at concentrations of 92 µg/1, 65 µg/1, 170 gg/I, 220 µg/I, and 7 5 mg/l, respectively Toluene and MTBE were detected in the groundwater sample collected from monitor well MW-3 at concentrations of 0 6 and 3 0 }tg/l, respectively BTEX, DIPE and TPH-G were detected in the groundwater sample collected from monitor well MW-5 at concentrations of 4,100 µg/1,4,800 gg/l, 660 µg/l, 1,800 �ig/l, 5 7 gg/I and 26 mg/l, respectively Toluene and MTBE were detected in the sample collected from monitor well MW-6 at concentrations of 0 6 4g/1 and 12 gg/l, respectively Toluene and TPH-G were detected in the groundwater sample collected from monitor well MW-7 at a concentration of 0 8 µg11 and 0 06 mg/l, respectively None of the selected gasoline oxygenates/additives, other than those described above, were detected at or above the laboratory reported detection limits in any of the groundwater samples A summary of the laboratory analytical results is presented in Table 2 on the next page, and in Figure 2, 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 �J* CONDOR