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1 20 September 2000 AGE-NC Project No 97-0333 ' Page 6ofII ' an average permeability of 1 x 101 ,porosity at 42 78 percent, moisture at 5 1 percent and organic content at 12 percent MW5-15 (sandy clayey)had an average permeability of 2 x 10 7,porosity at 42 43 percent,moisture at 25 8 percent and organic content at 1 4 percent MW5-25 (fine to coarse ' sand)had an average permeability of 3 x 10-3,porosity at 39 12 percent, moisture at 22 3 percent and organic content at 0 1 percent The laboratory results of the analysis are summarized in Table 2 The laboratory reports (Cooper Testing Laboratory Job No 255-015) and chain-of-custody forms are included in Appendix E Two soil samples (MW2-20 and MW4-20) were submitted for microbial enumeration and ' physicochemical laboratory analysis The results of the analysis indicated that hydrocarbon- degrading microorganisms were detected at 300 CFU(colony forming units)per gram from MW2-20 and detected at 6,400 CFU from MW4-20 The laboratory indicated that these physicochemical conditions at the site were well within the range necessary to support microbial growth and bioremedial activity Copies of the microbial enumeration and physicochemical laboratory reports tare included with Appendix F lie 3.0, QUARTERLY GROUND WATER MONITORING AND SAMPLING Ou l 1 July 2000, ground water monitoring and sampling was performed at wells MW-1, MW-Z, ' MW-3, MW-4 and MW-5, ground water elevation, flow direction and gradient were determined from the field data t3 1 MONITORING WEI L PURGE PROCEDURES ' Depths to ground water were measured in each well from the tops of the well casings at the site to { the nearest 0 01-foot utilizing a Solinst water level meter The ground water elevation in each well at the site was calculated by subtracting the measured depth to ground water from the surveyed ' casing elevation (Table 3) Ground water eleNations were plotted and contoured on a scaled site map (Figure 1 1) I tAfter watei levels were measured, approximately 9 gallons of ground water (a minimum of three casing water volumes per well) were removed frorn wells MW-1, MW-2, MW-3 and MW-4 utilising a submersible pump, approximately 25 gallons of ground water were removed from well MW-5 Temperature, pH and conductivity were measured for stabilization at regular purge-volume intervals fiom each well using a Hydac water analyzer Field data and logs are included with Appendix G ' Purged ground water was containen/ed in 55-gallon drums and was stored on-site in ar, area lacklm, general public access Ir I all C_' C erF ni� >nnec i7i ! risk 1