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1 15 SV''' eptember 2003 �II AGE-NC Project No 97-0333 Page 5of11 { ai t elevation in each momtonng well was calculated by subtracting the measured depth to'ground water frons the surveyed casing elevation(Table 2) Ground water elevation and vertical gradient data for wells MW-11, MW-12 and'MW-13`are depicted in cross section F-F' (Figure 3), ground water elevations were plotted in plan view for the informal First Zone, Second Zone, Third Zone and I Primary Aquifer Zone hydrogeologic flow units as defined in AGE's Cone Penetrometer Testing Sate Investigation -Fourth Quarter 2000, dated 07, February 2001 (Figures 4 through 7) On OS and 06 June 2003, approximately 4%2 to 12 gallons of ground water (a minimum of three I EI casing-water volumes per well)were evacuated(purged)from wells MW-1 through MW-6 utilizing disposable polyethylene bailers Temperature,pH and conductivity were measured for stabilization at regular purge-volume intervals from each well using an Oakton water analyzer Field data and logs ! Y, are provided in Appendix D The purged ground water was transferred to the ground water interim remediation system holding tank for treatment and disposal `' I I { The multi-level monitonng wells MW-7 through MW-13 were purged utilizing a Watera Hydro-Lift II pump equipped with a mechanical arm by lowering and raising a 3/8-inch outer diameter, length- discrete polyethylene hose equipped with a ball-valve water tip through the top chambers into the specific water-charged screened section Approximately'/2 to 6 gallons of ground water(a minimum ' ; of three casing-water volumes per well) were purged from the multi-level monitonng wells I Temperature,pH and conductivity were measured for stabilization at regular purge-volume intervals from each well using an Oakton water analyzer Field data and logs are provided'in Appendix D Multi-level well purged ground water was transferred to the ground water remediation system holding tank for treatment and disposal 1 32 FLOATING PETROLEUM PRODUCT I' On 05 June 2003, approximately 1-inch of a dark orange-brown, floating petroleum products was encountered in well MW-2 (Appendix D), thereafter, a clear, disposable polyethylene bailer was fls�l s utilized at the well to remove the floating petroleum product, bailing activities continued (approximately ns) un 7 gallotil product could not be observed ' I E Tlie floating petroleum product captured from bailing activities was placed inside a D O�T -approved t steel,drum andstoredat the southeast section at the site inanarea lackmglpublic access 3 3 „ GROUND WATER SAMPLING I E �i Ground water samples were collected from the purged wells MW-1 through MW-6 utilizing new, 2-inch,diameter disposable polyethylene bailers, ground,water samples were'l collected from the EE I � I�Ei Iki Illli , I i j I I Advanced GeoEnvironmental, I I II I !