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<br /> Quarterly Monitoring Report,October 1999
<br /> Canepa s Car Wash(Pacific Avenue)
<br /> November 22, 1999
<br /> Page -4
<br /> rLaboratory analyses Indicate that none of the analytes of interest were detected at or above the laboratory
<br /> reported detection limits in the groundwater samples collected from MW-5, MW-6, MW-7, and MW-8
<br /> r BTEX and MTBE were detected in the groundwater sample collected from monitor well MW-1 at
<br /> concentrations of 2,200, 1,400, 210, 760, and 640 micrograms per liter (gg/1), respectively TPH-G was
<br /> detected in the groundwater sample collected from MW-1 at a concentration of 8 2 milligrams per liter
<br /> r (mg/1) BTEX, MTBE, and TPH-G were detected in the groundwater sample collected from monitor
<br /> well MW-2 at concentrations of 37,000 µg/l, 3,600 µg/1, 1,800 µg/1, 6,800 µg/1, 300 µg/l, and 100 mg/l,
<br /> respectively BTEX, MTBE, and TPH-G were detected in the groundwater sample collected from soil
<br /> r vapor extraction. well SV-3 at concentrations of 9,600 µg/1, 2,100 gg/l, 440 gg/l, 1,400 µg/1, 14,000 µg/1,
<br /> and 25 mg/l, respectively Benzene, toluene, MTBE, and TPH-G were detected in the groundwater
<br /> sample collected from monitor well MW-3 at concentrations of 5 9 pg/l, 1 4 Pg/l, 10 gg/l, and 0 07 mg/l,
<br /> respectively Toluene and TPH-G were detected in the groundwater sample collected from monitor well
<br /> MW-4 at concentrations of 2 1 µg/1 and 0 07 mg/1, respectively A summary of the laboratory analytical
<br /> results is presented in Table 2 (below) and in Figure 2, Appendix A Laboratory report sheets indicating
<br /> analytical methods used, detection limits, and the results of the analyses are included in Appendix C
<br /> Historical groundwater analyses are presented in Table A, Appendix B
<br /> TABLE 2
<br /> LABORATORY ANALYTICAL RESULTS (OCTOBER 1999)
<br /> B T E X TPH-G MTBE
<br /> Detection limits 03 03 03 06 005 1 0
<br /> Monitor Well 1 D gg/1 gg/I Ag/1 µg/1 mg/I µg/1
<br /> 1707-M W I-10/14/99 2,200 1,400 210 760 82 640
<br /> 1707-MW2-10/14/99 37,000 3,600 1,800 6,800 100 300
<br /> r1707-MW3-10/14/99 59 14 ND ND 007 10
<br /> 1707-MW4-10/13/99 ND 21 ND ND 007 ND
<br /> 1707-MW5-10/13/99 ND ND ND ND ND ND
<br /> 1707-MW6-10/13/99 ND ND ND ND ND ND
<br /> 1707-MW7-10/13/99 ND ND ND ND ND ND
<br /> 1707-MW8-10/13/99 ND ND ND ND ND ND
<br /> 1707-SV3-10/14/99 9,600 2,100 440 1,400 25 14,000
<br /> Unit Conversions Analytical
<br /> ugll parts per billion(ppb) B,T,E XX=benzene toluene,ethyl benzene and xylene
<br /> mg/l parts per million(ppm) TPH-G=total petroleum hydrocarbons,quantified as gasoline
<br /> MTBE=Methyl tertiary Butyl Ether
<br /> IIID=not detected at or above reported laboratory detection limit
<br /> 5 0 DISCUSSION OF RESULTS
<br /> The average depth to groundwater measured during the October 1999 groundwater monitoring event was
<br /> approximately 34 4 feet below the monitor well measuring points The groundwater elevation r
<br /> tJ CONDOR
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