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I Quarterly Monitoring Report,January 2000 Canepa's Car Wash(Pacific Avenue) February 28,2000 Page -2 of benzene, toluene, ethyl benzene, and total xylenes (BTEX), total petroleum hydrocarbons quantified as gasoline (TPH-G), and methyl tertiary-butyl ether (MTBE) were present in 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 I 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 Snmulprobe sampling device in soil vapor collection mode The results indicated high levels of volatile orgame 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/addttnves by EPA Method. 8260 was 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 is limited to MTBE using EPA Method 602 A detailed Site History is included to Appendix B 3.0 QUARTERLY GROUNDWATER MONITORING--JANUARY 2000 On January 13, 14, and 15, 2000 a Condor representative performed field observations and collected I groundwater samples from the eight monitor wells and one soil vapor extraction well at the site (see Figure 2, Appendix A, for well locations) The sampling order was as follows MW-3, MW-5, MW-4, MW-8,MW-6, MW-7,MW-2,MW-1, and SV-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 I tape, water-level meter A clean, single-use, polypropylene, disposable bailer was lowered 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 A moderate petroleum hydrocarbon odor was noted in each of the groundwater sample collected from MW-2 and SV-1 A slight petroleum hydrocarbon odor was noted in each of the groundwater sample collected from MW-3, MW-4, MW-6, and MW-1 Petroleum hydrocarbon odors were not noted in the remaining groundwater samples All of the monitor wells except MW-I were purged using new, disposable bailers Monitor well MW-1 was purged with a Redn-Flow submersible pump that was decontaminated prior to use Approximately three well casing volumes of water were purged from each well (see the Groundwater Monitoring Field Forms in Appendix B) The purged water from each well was discharged to the washwater mixing pit 3.2 GROUNDWATER SAMPLING The groundwater samples obtained from monitor wells MW-2 through MW-8, and SV-I were collected 1 directly from the bailers by transferring the groundwater to two 40-milliliter glass vials LJ CONDOR