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' KLEINFELDER Other additional comments included running the stockpile samples and or discrete contaminated samples for a more comprehensive suite of analyses so the type of contaminant could be ' assessed. Mr. Knoll commented that follow-up confirmation sampling could then be done based on constituents of concern based on evaluation of the more comprehensive analyses of contaminated soil. ' Excavation activities continued the following week on June 25 and 26 and on July 3, 2001. ' Kleinfelder personnel and Mr. Shawn Fitzpatrick observed excavation activities during the excavation activities on these dates. The first set of five side-wall confirmation samples were collected during excavation activities on June 26, 2001. Six additional sidewall samples were ' collected on June 27, 2001. At this time the excavation was irregular in shape and measured approximately 120 feet by 70 feet by 9 feet deep. Soil discoloration and petroleum odors were no longer noted along the eastern and western side-walls. A previously existing wind row of soil near the northern boundary of the excavation prevented further excavation of discolored soil with petroleum odors to the north. Discolored soil and petroleum odor were still noted along the southeastern boundary of the site. On June 27, 2001 four exploratory potholes were excavated, two north of the excavation beneath an existing wind row of soil and one west and one south of the excavation. The potholes were ' advanced to assess the potential extent of contamination based on field observations. No soil discoloration was noted in exploratory potholes EPH-3 and EPH-4 located west and south, respectively, of the excavation. The two potholes located north of the large excavation were ' designated EPH-1 and EPH-2. A small band of discolored and odiferous soil approximately one foot thick was noted in exploratory pot-hole EPH-1 about three feet above groundwater ' (approximately seven feet below ground surface. No soil discoloration was noted in exploratory potholes EPH-2. Exploratory pothole EPH-1 was located about 20 north of the northern edge of the excavation. EPH-2 was located about 40 feet north of the large excavation. ' The final day of excavation activities resumed on July 3, 2001. The excavation was extended to the south and southeast until discolored soils with petroleum odors were no longer noted. In ' summary, field observations indicated that contaminated soil had been removed to the east, west and southerly directions. The excavation extended vertically to near or at groundwater. The final excavation dimensions were approximately 120 feet by 90 feet by 9 feet deep. Discolored soils and petroleum odors were still noted along the northern sidewall of the excavation in proximity to the pre-existing soil wind row. Four additional potholes (PH1 through PH4) were excavated along the perimeter to the north, east and southeast. Confirmation soil samples were collected ' and analyzed in the event analytical data was not consistent with field observations. Stained and odiferous soils from the larger excavation appeared to extended to groundwater in ' areas at a depth of about 9-feet below grade. As a result Fitzpatrick Homes asked Kleinfelder to assess groundwater conditions around the larger excavation. Four temporary wells were installed ' in proximity to SE-13 and LE-C. Soil and groundwater samples were collected and analyzed from the temporary wells. ' 20-4341-11.EO1/2011R959 Page 12 of 31 Copyright 2001,Kleinfelder,Inc. August 21,2001