ARCHIVED REPORTS_XR0009602 - Laserfiche WebLink

Home Browse Search

I ' Quarterly Monitoring Report January 1999 Canepa s Car Wash(Pari.Street) February 8 1999 ' Page 4 the results of the analyses are included in Appendix C Historical groundwater analyses are presented in Table A, Appendix B TABLE 2 LABORA TORY ANALYTICAL RESULTS (JANUARY 1999) ' Other B T E X MTBE Oxygenates/ TPH-G Additives ' MONITOR Detection 03 03 03 06 10 10- 10 0 O5 WELL/ DA 1 E Limits ug/] µg/1 µg/1 µg/1 µg/1 µg/1 tng/l SAMPLE Sample I D ' MW-1 1/20199 2038-MW1-1/20199 ND 06 ND ND ND ND 007 MW-2 1/20199 2038-MW2-1/20/99 280 160 370 500 ND ND 84 ' MW-3 1/20199 2038-MW3-1/20/99 05 46 06 06 54 ND 03 MW-4 1/20199 2038-MW4-1/20/99 ND ND ND ND ND ND ND ' MW-5 1/20199 20')8-MW5-1/20/99 2000 2,200 600 1200 ND ND 12 MW-6 1/20199 2038-MW6-1/20/99 16 13 03 ND 13 ND ND MW-7 1/20/99 2038-MW7-1/20/99 04 18 ND ND ND ND 01 Unit Com r,rsions Analytical ' µgfl parts per billion(ppb) B T E X=benzene,toluene,ethyl benzene and total avlenes mg/1 parts per million(ppm) TPH-G=total petroleum hydrocarbons,qu inttfied as gasoline MTBE=Methyl tertiary Butyl Ether Other Oxygenates/Additives=ethanol,Di-isopropyl ether(DIPS),Ethyl tertiary-Butyl Ether ' (ETBE) tertiary amyl Methyl Ether(TAMF),and tertiary-Butanol ND=none detected at or above reported laboratory detection limit I5 DISCUSSION OF RESULTS Since Septeniber, 1994, the depth to groundwater at the site has generally decreased from approximately 46 to ' 24 feet bgs The average depth to groundwater measured during the January 1999, groundwater monitoring eveint was approximately 24 1 feet below the monitor well measuring points The groundwater elevation ranged from 12 20 to 13 88 feet bmsl The groundwater elevation contour map (Figure 3, Appendix A) ' indicates that the groundwater gradient at the site Is generally towards the northeast This Is consistent with previous monitoring results A hydrograph of monitor wells MWA through MW-7 (Figure 4, Appendix A) illustrates the fluctuation of the groundwater table Historical groundwater measurements are provided in the ' accompanying Hydrograph Table (Appendix A) The laboratory analytical results for the January 1999, groundwater monitoring event are generally consistent ' with the laboratory analytical results for the Octobei 1998 gloundwatcr monitoring event None of the analytes of concern were detected in the groundwater sample collected from monitor well MW-4 TPH-G and all BTEX constituents were detected In the samples collected from MW-2, MW-3, and MW-5 Low concentrations of toluene and TPH-G were detected in the groundwater sample collected fiom MW- Low ' �J CONDOR