ARCHIVED REPORTS_XR0009597 - Laserfiche WebLink

Home Browse Search

r r Quarterly Monitoring Report July 1999 Canepa s Car Wash(Park Street) August 31 1999 Page 4 TABLE 2 LABORATORY ANALYTICAL RESULTS (JULY 1999) r Other B T E X M1 BE Oxygenatesl TPH-G Additives r MONITOR Detection 03 03 03 06 1 0 1 0- 10 1 005 WELL/ DATE Limits—* µg/1 Ag/l µg/1 µg/1 µg/l 4g/1 mg/1 SAMPLE Sample I D rMW-1 7/28/99 2038-MW I-7/28/99 ND ND ND ND ND ND ND MW-2 7/28/99 2038-MW2-7/28/99 99 59 170 210 ND ND 63 ' MW-3 7128199 2038-MW3-7/28/99 ND 23 ND ND 57 ND 008 MW-4 7/28/99 2038-MW4-7128/99 ND ND ND ND ND ND ND MW-5 7/28199 2038-MW5-7128/99 3 400 5 800 740 2 400 ND 7 4-DIPE 27 ' MW-6 7/28/99 2038-MW6-7128199 ND 03 ND ND 19 ND ND MW-7 7/28/99 2038-MW7-7/28199 ND t2LND ND -ND ND ND ' Unit Conversions Analytical µg/t parts per billion(ppb) B,T,E,X=benzene,toluene,ethyl benzene,and total xylenes mg/l parts per mrilion(ppm) TPH-CG=total petroleum hydrocarbons quantified as gasoline MTBE=Methyl tertiary Butvt Lther Other Oxygenates/Additives=ethanol,Di-isopropyl ether(DIPE),Ethyl ternary-Butyl Ether (ETBE) tertiary-ainvl Methyl Ether(TAME),and tertiary-Butanol IND=none detected at or above reported laboratory detection lomt ' 5 DISCUSSION OF RESULTS Since September, 1994, the depth to groundwater at the site has generally decreased from approximately 46 to ' approximately 23 feet bgs A hydrograph of monitor wells MW-1 through MW-7 (Figure 4, Appendix A) illustrates the fluctuation of the groundwater table The average depth to groundwater measured during the July 1999, groundwater monitoring event was approximately 23 feet below the monitor well measuring points The ' groundwater elevation ranged from 11 06 to 12 77 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 IThe laboratory analytical results for the July 1999, groundwater monitoring event are generally consistent with the laboratory analytical results for the April 1999, groundwater monitoring event None of the analytes of concern were detected in the groundwater samples collected from monitor wells MW-1 and MW-4 TPH-G ' and all BTEX constituents were detected in the groundwater samples collected from MW-2 and MW-5 Low concentrations of toluene, ethyl benzene, MTBE, and FPH-G were detected in the groundwater sample collected from MW-3 Low concentrations of toluene and MTBE were detected in the groundwater sample ' collected from MW-6 Low concentrations of toluene and FPH-G were detected in the groundwater sample collected from MW-7 DIPE was detected for the third thine in the groundwater sample collected from MW-5 t� CONDOR