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i IF 01 October 2004 AGE-NC Project No 97-0333 Page 5 of 11 - ' Primary Aquifer Zone hydrogeologlc flow units as defined inAGE's Cone Penetrometer Testing Site Investigation -Fourth Quarter 2000, dated 07 February 2001 (Figures 4 through 7) I On 01 and 02 April 2004, approximately 4 to 6'/2 gallons of ground water (a minimum of three casing-water volumes per well)were evacuated(purged)from wells MW-1 through MW-5 utilizing disposable polyethylene bailers,well MW-6 was not monitored due to encountering approximately ' 0 01 foot of floating petroleum product 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 The purged ground water was transferred to the ground water remediation system holding tank for treatment and disposal ; ,i The multi-level monitoring wells MW-7 through MW-13 were purged utilizing a Watera Hydro-Lift 11 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%to 5 gallons of ground water(a minimum of three casing-water volumes per well) was purged from multi-level monitoring wells MW-7 through MW-13 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 lie in Appendix D Multi-level well purged ground water was transferred to the ground water remediation system holding tank for treatment and disposal i 32 FLOATING PETROLEUM PRODUCT On 16 January 2004, approximately 0 01 foot of a dark orange-brown, floating petroleum product was encountered in well MW-6(Appendix F),thereafter,a clear,disposable polyethylene bailer was utilized at the well to remove the floating petroleum product, balling activities continued (approximately 2 gallons from MW-6) until product could not be observed The floating petroleum product captured from bailing activities was placed inside a Department of Transportation(D O T )-approved steel drum and stored at the southeast section at the site In an area lacking public access I I R +i ' On 26 January 2004, no floating petroleum product was encountered from wells MW-2 or MW-6 it during routine inspection 1 „ Advanced GeoEnvironmental,Inc