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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 25 feet bgs to at least 50 feet bgs during the previous 7 _ drought period Groundwater flow direction at the site has varied from north to south < � through the northeast and southeast quadrants '0 - � M QUARTERLY GROUNDWATER MONITORING, 2123100 Cn Zrn WEGE and Pittman Well Purging (PWP) collected quarterly groundwater samples frwa the three monitor wells at the site on February 23, 2000 See Appendix A for QA/ ,� - � details, methods, procedures, abbreviations, and acronyms used in sampling and analysis F f,�,-, Appendix A also contains notations of any variance from the standard methods and= CY procedures employed during the February 23, 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 February 23, 2000 The measurements were made from the surveyed elevation datum 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, PWP purged approximately three well volumes of water from 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 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 disposable polyethylene bailer and decanted with no head space into four 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 (DHS Certification #1753) The certified laboratory analyzed the groundwater samples from each monitor well for concentrations of TPH-G and BTEX using EPA methods 8015M and 8020 The laboratory also analyzed the groundwater samples for Volatile Organic Compounds including the Oxygenated Hydrocarbons MTBE, TBA, DIPE, ETBE, and TAME using EPA method 8260 and 1,2 Dichloroethane and 1,2 Dibromoethane by the same laboratory method DISPOSITION OF WASTEWATER . The 52 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 April 11, 2 Are Pump QM 1-3, 2000