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I TABLE 3 Well Construction Details ARCO Service Station No. 2186 3212 North California Street,Stockton,CA Construction Elevation Boring Borehole Casing Screened Filter Pack Bentonite Seal Cement Seal Well I.D. (TOC feet Depth Diameter Diameter Casing Slot Size Interval Interval Interval Interval Date Material {inches} above MSL) (feet.bgs) (inches} (inches) I i (feet bgs) .(feat bgs}. (feet bgs) {feet bgs) MonitoringWells B-1/MW-1 8/29/1995 14.62 75.6 10 4 PVC Sch,40 0.020 45.6-74.7 43-75.6 40-43 0-40 B-41MW-2 8/29/1995 15,50 75.5 10 4 PVC Sch,40 0.020 55.5-74.5 53-75.5 48-53 0-48 B-5/MW-3 8/29/1995 14.53 75 10 4 PVC SCh.40 0.020 55.3-74.3 52.8-75 47.5-52.8 0-47.5 B-9/MW-4 10/30/1997 13.83 75 10 4 PVC Sch,40 0.020 45-65 43-65 41-43 0-41 MW-5 8/13/2001 12,76 81 8 2 PVC Sch,40 0.020 60-80 58-80 54-58 0-54 MW-6 8/13/2001 13.80 81 8 2 PVC Sch.40 0.02a 60-80 58-80 55-58 0-55 MW-7 8/13/2001 13.96 81 8 2 PVC Sch.40 0.020 60-80 58-80 55-58 0-55 BH-41MW-8 4/16/2004 14.28 135 8 2 PVC SCh.40 0.020 129-134 126-134 120-126 0.5-120 Vapor Extraction Wells B-3/VW-1 (A) 8/29/1995 14.60 62.6 10 2 PVC Sch.40 0.020 22.2-36.3 21-38 18-21 0-18 B-3/VW-1 (B) 8/29/1995 14.59 62.6 10 2 PVC Sch.40 0.020 42.6-61.6 41-62.6 38-41 0-18 B-7/VW-2(A) 9/7/1995 14.87 62,2 10 2 PVC SCh,40 0.020 22.1-36 21-38 18-21 0-18 8-71VW-2(B) 9/7/1995 14.89 62.2 10 2 PVC SCh,40 0.020 42.5-61.5 41-62.2 37.7-40.7 0-17 B-8NW-3(A) 9/7/1995 13.99 61.5 10 2 PVC Sch.40 0.020 22-36 20.8-37.8 17.8-20.8 0-18 B-BNW-3(B) 9/7/1995 13.98 61.5 10 2 PVC Sch.40 0.020 41.6-60.8 40.8-61.3 37.8-40.8 0-18 VW-4 4/13/2004 14.71 41 10 4 PVC Sch,40 0.020 25-40 23-40 20-23 0-20 Air Sparge Wells 8H-2/AW-1 4/13/2004 NA 66 8 2 PVC 0.020 60-65 58-65 55-58 0-55 Notes: bgs=below ground surface TQC=top of casing PVC=polyvinyl chloride MSL=mean sea level Sch.=Schedule Filter Pack is with#3 sand --=Not applicable Elevations are in US survey feet 2186 Well Construction Details 2006 Table 4.xls Page 1 of 1 SECOR