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1 <br /> Quarterly Monitoring Report,July 2001 <br />' Canepa's Car Wash(Park Street) <br /> August 27,2001 <br /> Page 4 <br /> TABLE 2 <br />' GROUNGWATER SAMPLE LABORATORY <br /> RESULTS <br /> MW-1 THROUGH MW-7 <br />' B T E X MTBE Other TPH-G <br /> Oxygenates/ <br /> Additives* <br />' MONITOR Detection 0 3µg/L 0 3 pg/L 0 3 µg/L 0 6µg/L 1 0µg/L I 0-- 10µg/L 0 05 mg/L <br /> Limits---> <br /> WELL/SAMPLE DATE Sample I D <br /> MW-1 7/18101 2038-MWI-7/18/01 <0 3 <0 3 <0 3 <0 6 <I 0 <l 0-10 <005 <br />' MW-2 7118/01 2038-MW2-7118101 29 59 81 180 <20 <20-200 10 <br /> MW-3 7/18/01 2038-MW3-7118101 <0 3 <0 3 <0 3 <0 6 34 <1 0-10 <0 05 <br /> MW-4 7/18/01 2038-MW4-7118/01 <0 3 <0 3 <0 3 <0 6 2 <1 0-10 <0 05 <br />' MW-5 7/18/01 2038-MW5-7118101 5,300 4,000 1,000 2,800 <20 <20-200 40 <br /> MW-6 7/18/01 2038-MW6-7/18/01 <0 3 <0 3 <0 3 <0 6 12 <1 0-10 <0 05 <br /> MW-7 7/18/01 2038-MW7-7/18/01 <0 3 <0 3 <0 3 <0 6 <1 0 <1 0-10 <0 05 <br />' • Unit Conversions Analytical <br /> µglL parts per Nihon(ppb) B T,E X=benzene,toluene,ethyl benzene,and total xylenes <br /> mg/L parts per million(ppm) rPH-G--total petroleum hydrocarbons quantified as gasoline <br /> MTBE-Methyl tertiary Butyl Ether <br />' Other Oxygenates/Additives=ethanol Di-isopropyl ether(DIPS),Ethyl tertiary-Butyl Ether <br /> (ETRE) tertiary-amyl Methyl Ether(TAME),and tertiary-Butanol <br /> *=See laboratory reports in Appendix C for actual laboratnry reporting limits <br /> 5 DISCUSSION OF RESULTS <br />' 5 1 DISCUSSION OF GROUNDWATER ELEVATIONS <br /> The groundwater elevation at the site has generally increased from approximately 35 feet bmsl to <br /> approximately 11 feet bmsl since September 1994 A hydrograph of monitor wells MW-1 through MW-7 <br /> (Figure 3, Appendix A) illustrates the fluctuation of the groundwater table The average depth to <br /> groundwater measured in the monitor wells on July 18, 2001 was approximately 24 0 feet below the <br /> monitor well measuring points, which is approximately 16 to 22 feet above the top of all well screens <br /> The groundwater elevation ranged from 12 12 to 13 91 feet bmsl The groundwater elevation contour <br /> map (Figure 2, Appendix A) indicates that the groundwater gradient at the site is generally towards the <br /> northeast This is consistent with previous monitoring results <br /> 5 2 DISCUSSION OF ANALYTICAL RESULTS <br /> The laboratory analytical results for the July 2001 groundwater monitoring event (see Figures 4 through <br /> 10, Appendix A) are generally consistent with the laboratory analytical results for the April 2001 <br /> • groundwater monitoring event BTEX and TPH-G were detected in the groundwater samples collected <br /> from MW-2 and MW-5 Low concentrations of MTBE were detected in the groundwater samples <br /> collected from MW-3, MW-4, and MW-6 The third quarter 2001 laboratory analytical results generally <br /> C� CONDOR <br />