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The groundwater in the vicinity of the site is unconfined Groundwater elevation at the is site varies from a wet year high of 25 feet bgs to at least 50 feet bgs during the previous drought period Groundwater flow direction at the site has varied from north to south through the northeast and southeast quadrants QUARTERLY GROUNDWATER MONITORING, 6/8/00 WEGE and Pittman Well Purging (PWP) collected quarterly groundwater samples fionn the thice monitor wells at the site on June 8, 2000 See Appendix A for QA/QC, details, methods, procedures, abbreviations, and acronyms used in sampling and analysis Appendix A also contains notations of any variance from the standard methods and proceduies employed during the June 8, 2000 monitoring round See Appendix B for copies of the field data sheets DEPTH TO WATER MEASUREMENTS WEGE measured depth to water in all wells on June 8, 2000 The measurements were made from the surveyed elevation datum at the top of casing at each well using an electijeal air/water interface probe (Table 1) No free product or product sheen was observed in any of the monitor wells COLLECTION AND CERTIFIED ANALYSIS OF GROUNDWATER SAMPLES Following depth to water measurements, PWP purged approximately three well volumes of water fiom each well using a truck mounted vacuum lift pump and dedicated one inch diameter PVC tubing The volume of water purged from each well is noted on the field data sheets (see Appendix B) After puigmg, the wells were allowed to recover to at least 80% of their original well volumes A groundwater sample was then collected from each well with a disposable polyethylene bailer and decanted with no head space into four 40 nil VOA vials containing 0 5 ml HCL acid as a preservative The samples were delivered with accompanying chain of custody documentation to North State Environnnental Laboratories (DHS Certification #1753) The certified laboratory analyzed the groundwater samples from each monitor well for coincentiatioins of TPH-G and BTEX and MTBE using EPA methods 8015M and 8020 DISPOSITION OF WASTEWATER The 40 gallons of wastewater that were generated from purging of the monitor wells were temporarily contained on-site in a labeled 55 gallon dot approved drum On July 19, 2000 The wastewater was transported by M P Environmental Services, Inc via a non— hazardous waste manifest to Seaport Environmental Services in Redwood City, a licensed . wastewater recycler See Appendix D for a copy of the non-hazaidous waste manifest 2 Are Pump QM 4-6, 2000