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f <br /> I <br /> Table 1. Summary of Well Construction Details, ARCO Facility 2093,Tracy <br /> Well Borehole Casing Screened Filter Bentonite Cement <br /> number depth (feet) size(1.D. in inches) interval(0.020 slot) pack seal seal <br /> S-1 (a) 30 1 27.5-30 24.5-30 19-24.5 2-19 <br /> S-2(a) 30 1 27.5-30 24.5-30 19-24.5 2-19 <br /> S-3 (a) 30 1 27-29.5 24-30 19-24 2-19 <br /> SMW-1 <br /> sparge 30 1 24.5-27 24-30 20-24 0.5-3.5 <br /> monitoring 30 4 4.5-19.5 4-20 3.5-4 0.5-3.5 <br /> VES-1 <br /> sparge 30 1 27.5-30 25-30 20-25 0.5-2.5 <br /> vapor ext. 30 2 4-14 3.5-20 2.5-3.5 0.5-2.5 <br /> VES-2 <br /> sparge 30 1 27.5-30 25-30 20-25 0.5-2.5 <br /> vapor ext. 30 2 4-14 3.5-20 2.5-3.5 0.5-2.5 ; <br /> VES-3 (a) <br /> sparge 30 1 27.5-30 25-30 20-25 2-3.5 <br /> vapor ext. 30 2 4.5-12.5 4-20 3.5-4 2-3.5 r <br /> VES-4(a) <br /> sparge 30 1 27.5-30 25-30 20-25 24 <br /> vapor ext. 30 2 5-13 4.5-20 4-4.5 2-4 <br /> VES-5 (a) <br /> sparge 30 1 26.6-29 23.5-30 18-23.5 2-3.5 <br /> vapor ext. 30 2 5-14.5 4.5-18 3.5-4.5 2-3.5 <br /> VES-6(a) <br /> sparge 30 1 27.5-30 25-30 20-25 2-3.5 <br /> vapor ext. 30 2 4.5-14.5 4-20 3.5-4 2-3.5 <br /> VES-7 <br /> sparge 30 1 24-27.5 23-30 19-23 0.5-3.5 <br /> vapor ext. 30 2 4.5-12.5 4-19 3.5-4 0.5-3.5 <br /> (a) Wells installed in existing steel traffic vault <br />