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' 22 June 2001 • AGE-NC Project No 97-0333 ' Page 4 of 10 ' Zone, Third Water Zone and Primary Aquifer Zone from P-7, P-8, P-9 and P-10 Results of the December 2000 CPT investigation were reported in Cone Penetrometer Testing Site Investigation -Fourth Quarter 2000, dated 07 February 2001, prepared by AGE ' 31 January 2001 -Ground water monitoring and sampling were performed at wells MW-1, MW-2, MW-3, MW-4 and MW-5 Ground water levels were measured between 15 and 16 feet below the tops of the well casings, ground water flow direction at the site was Inferred to be flowing towards the north at an approximate gradient of 0 001 Laboratory analysis of ground water samples detected TPH-g at the site at concentrations as high as 120,000 tig/l, BTEX compounds were detected at concentrations as high as 23,000,ug/l,MTBE and TAME were detected at concentrations as high as 950,000 µg11 Tetrachloroethene (PCE) was detected In a water sample collected from MW-4 at a concentration of 4,900 µg11, ' trichloroethene (TCE) from MW-5 at a concentration of 1 2 ug/l, 1,2,3-trlchlorobenzene from MW-2 at a concentration of 51,000 ,ug/l and hexachlorobutadlene from MW-1 and MW-2 at concentrations as high as 30,000 4gll Results of the January 2001 Investigation ' were reported In Quarterly Report - First Quarter 2001, dated 30 April 2001, prepared by AGE ' 30 March 2001 - Ground water extraction well EW-1 and ground water observation well MW-6 were installed at the site for performance of aground water pumping test Soil borings EW-1 and MW-6 were advanced vertically to depths of 45 feet below surface grade (bsg) Boring EW-I was single-completed as a 6-inch diameter ground water extraction well and MW-6 single-completed as a 2-Inch diameter ground water observation well with screen Intervals between 20 and 45 feet bsg Soil and ground water samples were not collected during this Investigation Results of the March 2001 Investigation were reported In Ground Water Aquifer Pumping Test Report - Second Quarter 2001, dated 15 May 2001, prepared by AGE ' 05 April 2001 - A ground water aquifer pumping testing was performed at the site to assess the general ground water aquifer characteristics and to assess aquifer response to ground ' water extraction utilizing wells EW-1, MW-1, MW-2, MW-3 and MW-6 at a constant pumping rate of 6 gallons per minute, purged ground water was containerized on-site in a 6,500-gallon poly tank (Baker tank) From data collected during the pumping test, a transmisslvity value was calculated at 955 ft'/day, a storativity value calculated at 0 032, a hydraulic conductivity value of 0 013 cm/s and a radius of Influence projected at 140 feet utilizing a semi-loganthmlc plot of draw-down versus distance Results of the March 2001 investigation were reported In Ground Water Aquifer Pumping Test Report-Second Quarter 2001, dated 15 May 2001, prepared by AGE Advanced GeoFnvironmental,Inc