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TABLE 1 <br /> Well Construction Details <br /> ARCO Service Station No. 4932 <br /> 16 East Harding Way, Stockton, CA <br /> Boring Borehole Casing Screened Filter Pack Bentonite Seal Cement Seal <br /> Elevation Slot Size <br /> Well I.D. Construction Date (TOC feet) Depth Diameter Diameter Casing Material (inches) Interval Interval Interval Interval Comments <br /> (feet bgs) (inches) (inches) (feet bgs) (feet bgs) (feet bgs) (feet bgs) <br /> Ozone Sparge Wells(S) <br /> S-1 3/10/2005 — 40 8 0.75 Sch.40 PVC — 37.5-40 33-40 31-33 0-31 <br /> S-2 3/9/2005 — 40 8 0.75 Sch.40 PVC — 37.5-40 33-40 30-33 0-30 <br /> S-3 3/9/2005 — 40 8 0.75 Sch.40 PVC — 37.5-40 33-40 30-33 0-30 <br /> S-4 3/8/2005 — 40 8 0.75 Sch.40 PVC — 37.5-40 34.5-40 32.5-34.5 0-.32.5 <br /> S-5 3/8/2005 — 40 8 0.75 Sch.40 PVC — 37.5-40 34.5-40 32-34.5 0-32 <br /> S-6 3!7/2005 — 40 8 0.75 Sch.40 PVC — 37.540 35-40 32.5-35 0-32.5 <br /> Notes: <br /> bgs=below ground surface Filter Pack is with#3 sand <br /> TOC=top of casing —=Not available <br /> PVC=polyvinyl chloride Elevations are in US survey feet <br /> SS=Stainless Steel Information presented in this table was provided to Broadbent by Atlantic Richfield Company and their previous consultants.Although,Broadbent has no <br /> Sch.=Schedule reason to believe that this information is incorrect,Broadbent has not independantly verified this information for accuracy. <br /> 2of2 <br />