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Quarterly Monitoring Report,January 2000 Canepa's Car Wash(Park Street) March 2 2000 Page 3 ' TABLE 1 GROUNDWATER ELEVATION DATA (January 18, 2000) ' 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 23 99 -1302 MW-2 45 -65 1037 2479 -1442 rMW-3 45 -65 1 1 76 2527 -13 51 MW-4 40-60 1085 2357 -1272 MW-5 40-60 1125 2497 -13 72 MW-6 40-60 1172 25 14 -1342 MW-7 40-60 1105 2431 -13 26 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/LU>~T, for benzene, toluene, ethyl benzene, and total xylenes (BTEX) by EPA Method 602, and for selected gasoline oxygenates/additives by EPA Method 8260 The I gasoline oxygenates/additives include methyl tertiary-butyl ether (MTBE), ethanol, tertiary-butanol, di- isopropyl ether (DIPE), ethyl tertiary-butyl ether(ETBE), and tertiary-amyl methyl ether(TAME) Laboratory analyses indicate that none of the analytes of interest were detected at or above the laboratory 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 4 micrograms per liter (µg/1) and 0 07 milligrams per liter (mg/l), respectively BTEX and TPH-G were detected in the sample collected from monitor well MW-2 at concentrations of 79 pg/1, 44 µg/1, 130 pg/l, 160 µg/1, and 4 6 mg/l, respectively Toluene, ethyl benzene and TPH-G were detected in the groundwater sample collected from monitor well MW-3 at concentrations of 2 9 Vtg/1, 0 3 lig/l, 0 10 mg/l respectively BTEX, and TPH-G were detected in the groundwater sample collected from monitor well MW-5 at concentrations of 4,400 µg/1, 6,500 µg/1, 980 pg/l, 2,900 µg/1, and 32 mg/1, respectively Toluene was detected in the sample collected from monitor well MW-6 at a concentration of 0 6 µg/l Toluene and TPH-G were detected in the groundwater sample collected from monitor well MW-7 at a concentration of 0 8 µg/1 and 0 06 mg/1, respectively None of the selected gasoline oxygenates/additives 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 analytical data are presented in Table A, Appendix B I � t� CONDOR