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The groundwater in the vicinity of the site is unconfined Groundwater elevation at the <br /> site varies from a wet year high of 25 feet bgs to at least 50 feet bgs during the previous <br /> — drought period Groundwater flow direction-at the site has varied from north to south <br /> through the northeast and southeast quadrants <br /> QUARTERLY MONITORING, 1/31/03, 5/22/039 AND 8/07/03 <br /> WEGE and Pittman Well Purging (PWP) collected quarterly groundwater samples from <br /> the four monitor wells at the site on January 31, 2003, May 22, 2003, and August 7, <br /> 2003 See Appendix A for QA/QC, details, methods, procedures, abbreviations, and <br /> acronyms used in sampling and analysis See Appendix B for copies of the field data <br /> sheets <br /> DEPTH TO WATER MEASUREMENTS <br /> WEGE measured depth to water 1n all four wells on January 31, 2003, May 22, 2003, and <br /> August 7, 2003 The measurements were made from the surveyed elevation datum at the <br /> top of casing at each well using an electrical air/water interface probe (Table 1) No free <br /> product or product sheen was observed in any of the monitor wells <br /> COLLECTION AND CERTIFIED ANALYSIS OF GROUNDWATER SAMPLES <br /> Following depth to water measurements, PWP purged approximately three well volumes <br /> of water from each well usmg a truck mounted vacuum lift pump and dedicated one Foch <br /> diameter PVC tubing The volume of water purged from each well is noted on the field <br /> data sheets (see Appendix B) <br /> After purging, the wells were allowed to recover to at least 80% of their ongunal well <br /> volumes A groundwater sample was then collected from each well with a disposable <br /> polyethylene bailer and decanted with no head space into four 40 ml VOA vials <br /> containing 0 5 ml HCL acid as a preservative <br /> The samples were delivered with accompanying chain of custody documentation to Kiff <br /> Analytical Laboratories (DHS Certification#2236) The certified laboratory analyzed the <br /> groundwater samples from each monitor well for concentrations of TPH-G and BTEX <br /> and MTBE using EPA method 8260B <br /> DISPOSITION OF WASTEWATER <br /> The 184 gallons of wastewater that were generated from purging of the monitor wells <br /> during the three quarterly monitoring rounds were temporarily contained on-site in <br /> labeled 55 gallon dot approved drums <br /> 2 Arc Pumn OM 1-9 2003 <br />