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The groundwater in the vicinity of the site is unconfined Groundwater elevation at the site varies from a wet year high of 7 feet bgs to about35-40 halfeet b during the ta Phe ious t drought period Groundwater flow direction at t e st since December 1997 QUA 'ER X GROUNDWATER MONITORING 5112199 WEGE and Pittman Well Purging (PWP) personnel collected quarterly groundwater samples from the five monitor wells aabbreviations, nd acronyms used in Appendix samplingand QA/QC, details, methods, procedures, analysis DEPTH TOW JER MEASUREMENTS Depth to water was measured at all wells on May 12, 1999 The measurements were made from the surveyed elevation at the top of casing at each well using an electrical 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, WEGE and PWP personnel used a truck mounted vacuum lift pump and dedicated one inch diameter PVC tubing to purge each well of three volumes of water After purging, 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 polyethylene bailer and decanted with no headspace into two 40 ml VOA vials containing 0 5 ml HCL acid as a preservative The samples were delivered with accompanying chain of custody documentation to North State Environmental Laboratories (NSE) The certified laboratory (DHS 41753) analyzed the water samples from each monitor well for concentrations of TPH-G using EPA method 8015 modified and BTEX and MTBE using EPA method 8020 DISPOSITION OF WASTEWATER The purged wastewater was contained on-site in Environmentallabeled gallon DOT yic ms This wastewater was transported by Evergreen 5 s to tther re ng facility on July 13, 1999 under a non-hazardous waste manifest (see Appendix D) 2 Sanchez QM 4-6 1999