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Jase Il Environmental Site Assessment Heritage Square Page 7 , Table 3—Laboratory Analytical Results for Phase II ESA Soil Samples CAM 17 Metals(.lune 10 and 11,2002) Sample ID-. 3572D-B3-15.5' B5-5-15.5' Constituent Method RL(mg/kg) PRG 6/10/02 6111/02 y Antimony 601013 0.30 31 1.0 1.2 Arsenic 601013 0.30 22 11 6.8 Barium 6010B 0.40 5,400 100 119 Beryllium 6010E 0.40 150 ND ND Cadmium 6010B 0.15 37 0.60 0.71 Chromium 601013 0.25 210 42 30 Cobalt 6010B 0.25 4,700 13 II Copper 601013 0.35 2,900 44 29 Lead 6010B 0.30 400 6.0 16 Mercury 7471A 0.050 23 ND ND Molybdenum 6010B 0.25 390 ND ND Nickel 6010B 0.45 1,600 40 31 Selenium 6010B 0.30 390 ND ND Silver 6010B 0.25 390 ND ND Thallium 6010E 0.25 5.2 ND ND Vanadium 6010B 0.25 550 58 52 zinc 6010B 0.50 23,000 56 40 Notes Lluits NO=constituent not detected in this sampie at mg/kg=tniiligratns per kilogram,parts per million ar above the laboralory reporting limit • 6.0 SUMMARYIDISCUSSION OF RESULTS 6.1 SAMPLING SCHEME The soil and groundwater sampling scheme consisted of collecting and retaining for hydrocarbon constituent laboratory analyses a minimum of two soil samples per boring for borings B-1 through B-4. Additional soil samples were retained if obvious signs of contamination were noted. A minimum of two soil samples per boring were collected and retained for hydrocarbon constituent laboratory analyses for borings B-5 through B-8. The soil samples collected from each of the borings B-5 through B-8 were composited by the laboratory for analyses. The discrete samples collected from the boring with the highest composite sample contaminant levels were then submitted for the same analyses. The single discrete sample from borings B-1 through B-4 and the single discrete sample from borings B-5 through B-8 with the highest contaminant levels were subsequently submitted for analysis for CAM 17 metals. The borings in the vicinities of TKl and TK2 with the most obvious signs of contamination were advanced to groundwater and a groundwater grab sample was collected from each to be analyzed for hydrocarbon constituents. A groundwater grab sample was also collected from the abandoned well to be analyzed for hydrocarbon constituents. The soil samples collected from borings C-1 through C-4 were analyzed for hydrocarbon constituents and total lead. 6.2 DISCUSSION OF RESULTS ' Laboratory analytical results indicate that soil below approximately 16 to 20 feet bgs has not been impacted by petroleum hydrocarbons at the site. Based on held observations, PID measurements, and to CONDOR