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I ' Quarterly Monitoring Report,October 2000 • Canepa's Car Wash(Pacific Avenue) Page-2 ' gasoline (TPH-G), and methyl tertiary-butyl ether (MTBE) were present at the former location of the fuel dispenser islands ' Prior to granting approval of installation of the new SVE system, the Underground Storage Tank Clean-Up Fund indicated the need for additional investigation Condor subsequently conducted the installation and sampling of two soil borings adjacent to the SVE well array The investigation included soil vapor screening ' using a Simulprobe sampling device in soil vapor collection mode The results indicated high levels of volatile organic compounds were present in the soil vapor at the site The laboratory analytical results of the soil and groundwater samples collected during the investigation are presented in Report — Soil and Groundwater Investigation, dated June 12, 1998 Operation of the SVE system has continued since its initiation on March 15, 1999 Due to a directive from the Underground Storage Tank Cleanup Fund (USTCF), laboratory analyses of groundwater samples for gasoline oxygenates/additives by EPA Method 8260 were discontinued beginning with the October 1999 quarterly groundwater monitoring event The USTCF indicated that analysis by EPA Method 8260 is not warranted based on historical groundwater laboratory analytical results Commencing with the October 1999 quarterly groundwater monitoring event, laboratory analyses of groundwater samples for gasoline oxygenates/additives are limited to MTBE using EPA Method 8020 or 8021B 3 0 QUARTERLY GROUNDWATER MONITORING —OCTOBER 2000 • On October I2, 2000 a Condor representative collected groundwater samples from the eight monitor wells at the site (see Figure 3, Appendix A, for well locations) The sampling order was as follows MW- 3, MW-7, MW-8, MW-5, MW-4,MW-6, MW-2, and MW-1 3 1 GROUNDWATER MONITORING OBSERVATIONS AND PARAMETERS The static water level in each well was measured to the nearest 0 01-foot with a battery-operated, flat tape, water-level meter A clean, single-use, polypropylene, disposable bailer was Iowered into each well to check for floating product, petroleum odors, and sheen Floating product was not observed in any of the monitor wells during the groundwater sampling The surface of the groundwater table was above the top of the well screens, however Olfactory observations were • Strong petroleum hydrocarbon odors detected in the groundwater sample collected from MW-1 and MW-2 + A moderate petroleum hydrocarbon odor detected in the groundwater sample collected from MW-4 • A slight petroleum hydrocarbon odor detected in the groundwater sample collected from MW-7 IPetroleum hydrocarbon odors were not noted in any of the other groundwater samples Gray colored water was noted in the groundwater samples from monitor wells MW-1, MW-2, MW-4, MW-h, and MW-7 A light brown roior wins noted in the sampie from MW-5 Fair water clarity was inoted in the samples from MW-2, MW-6, and MW-7 Poor water clarity was noted in the groundwater samples from MW-4 and MW-5 No color and good clarity were noted in the remaining groundwater samples Monitoring wells MW-2 and MW-8 were purged using new, disposable bailers Monitor wells MW-1, I and MW-3 through MW-7 were purged with Redi-Flow submersible pumps which were decontaminated prior to use Approximately three well casing volumes of water were purged from each well (see the Naliw i �� CONDOR