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TABLE 1 Well Construction and Destruction Details 76(Former BP) Service Station No. 11194 2375 North Tracy Boulevard,Tracy, California Elevation Borehole Casing Screened Filter Pack Bentonite Seal Cement Seal Well I.D. Construction (TOC feet above Boring Depth Diameter Diameter Casing Slot Size Interval Interval Interval Interval Comments Date MSL) (feet bgs) Material (Inches) (inches) (Inches) (feet bgs) (feet bgs) (fest bgs) (teat bgs) Groundwater Monitoring Wells-On Site MW-1 8/29/1986 28.99 20 8 2 PVC 0.02 5-20 4-20 34 0-3 Pressure Grout MW-2 8!2911986 28.33 20 a 2 PVC 0.02 5-20 4-20 3A 0-3 Overdrill MW-3 8/29/1986 27.35 20 8 2 PVC 0.02 5-20 4-20 3-0 0-3 Pressure Grout MW-4 8!29!1986 28.07 20 8 2 PVC 0.02 5-20 4-20 34 0-3 Overdrill MW-5 1127/1987 27.33 20 8 4 PVC 0.02 4-20 3-20 2.5-3 0-2.5 Overd4il MW-9 3/30/2007 28.39 50 a 2 PVC 0.02 40-45 38-50 36-38 0-36 Pressure Grout AMW-5 10/29/1991 28.18 18,5 10 4 PVC 0.02 5-15 4-16.5 3.5-4 0.5-3.5 Pressure Grout AMW-6 11/19/1991 27.49 14 10 4 PVC 0.02 4-14 3.5-14 3-3.5 1.5-3 Pressure Grout Groundwater Monitoring Wells•Off Site MW-6 1/27/1987 27.72 15 8 2 PVC 0.02 4-15 3-15 2.5-3 0-2.5 Overdrill MW-7 1127/1987 26.64 20 8 2 PVC 0.02 4-20 3-20 NA 0-3 Pressure Grout MW-8 1/27/1987 27.74 15 a 2 PVC 0.02 4-15 3-15 2.5-3 0-2.5 Pressure Grout AMW-1 4/23/1990 28.71 20 10.5 4 PVC 0.02 4-20 320 2-3 0.2 Pressure Grout AMW-2 4/2311990 28.62 20 10.5 4 PVC 0,02 5-20 4-20 3-4 0-3 Pressure Grout AMW-3 8!811990 27,42 15 8.5 2 PVC 0.02 2.5-15 2-15 1.5-2 0-1.5 Pressure Grout AMW-4 8/811990 27.83 15 8.5 2 PVC 0.02 2.5-15 2-15 1.5-2 0-1.5 Pressure Grout Notes: bgs=below ground surface MSL=mean sea level NA=Not applicable -=Not availablo 1_ Elevations are in US survey feet,Vertical Datum is NGV029 J" Wells were resurveyed by Morrow Surveying on April 2,2007. 1 of 1