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The groundwater in the vicinity of the site is semiconfined Groundwater elevation at the <br /> site varies from a wet year high of 7 feet bias to about 35-40 feet bgs during the previous <br /> drought period Groundwater flow direction at the site has generally been to the west <br /> since December 1997 <br /> QUARTERLY GROUNDWATER MONITORING, 9127100 <br /> WEGE and Pittman Well Purging (PWP) personnel collected quarterly groundwater <br /> Gamples from the five monitor wells at the site on September 27, 2000 See Appendix A <br /> for QA/QC, details, methods, procedures, abbreviations, and acronyms used in sampling <br /> and analysis <br /> DEPTH TO WATER MEASUREMENTS <br /> De-,th to water was measured at all wells on September 27 2000 The measurements <br /> were made from the surveyed elevation at the top of casing at each well using an <br /> c,e�T„cai air/water interface probe (Table 1) No free product or product sheen was <br /> observed in any of the monitor wells <br /> COLLECTION AND CERTIFIED ANALYSIS OF GROUNDWATER SAMPLES <br /> Following depth to water measurements, WEGE and PWP personnel used a truck <br /> mounted vacuum lift pump and dedicated one inch diameter PVC tubing to purge each <br /> well of three volumes of water <br /> After purging, the wells were allowed to recover to at least 80% of their original well <br /> volumes A groundwater sample was then collected from each well with a polyethylene <br /> bailer and decanted with no headspace into two 40 ml VOA vials containing 0 5 ml HCL <br /> acid as a preservative <br /> The samples were delivered with accompanying chain of custody documentation to North <br /> State Environmental Laboratories (NSE) The certified laboratory (DHS 41753) <br /> analyzed the water samples from each monitor well for concentrations of TPH-G using <br /> EPA method 8015 modified and BTEX and MTBE using EPA method 8020 <br /> DISPOSITION OF WASTEWATER <br /> The 67 gallons of wastewater that were purged from the monitor wells were temporarily <br /> contained on-site in labeled 55 gallon DOT approved drums <br /> 2 Sanchez QM 7-9, 2000 <br />