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TABLE 1 SUMMARY OF CARBON USAGE 8200 N. Highway 99, Stockton, CA Gallons through Mass Removed Load Air Load C1 Load C2 Date Range Components (TAHg+BTBX+MTBE)in Stripper Notes System (pounds) (pounds) pounds (pounds) 12/04/03 to 07126104 C1 (lead),C2(trail),200 324,342 95.1 0 95.1 0 No Air Stripper,Virgin carbon Ib polish in C1 and C2 Air Stripper,C1 (lead), 95%Air Stripper efficiency, 07/26/04 to 10!26!04 C2(trail),200-Ib polish 32510 11.3 11.3 0.6 0 breakthrough in C1 on 10126!04 Air Stripper,C1 (lead), Breakthrough in C1 on 10!26!04 to 12/20/04 C2(trail),200-Ib polish 149307 11.5 11.5 0.9 0.9 10126104,92%Air Stripper efficiency 12/20/04 to 01/18/05 C2(lead),C1 (trail) 52309 1.8 0 0 1,8 Virgin Carbon in C1,No Air Stripper 01!18105 to 02/24/05 Air stripper,C2(lead), 101171 4.7 4.7 0 0.8 82%Air Stripper efficiency C1 (trail) Assume 82%Air Stripper 02/24/05 to 03108105 Air stripper,C1 55188 2.7 2.7 0.5 0 efficiency,C2 offline due to scaling i 1 Air stripper,C2(lead),trail 44047 6Assume 82%Air Stripper 03!08105 to 03!18!05 C1 .0 6.0 0 1. (trail) efficiency Assume 82%Air Stripper efficiency,C2 offline due to 03118!05 to 03/30/05 Air stripper,C1 39357 5.4 5,4 1.0 0 scaling,samples could not be collected as scheduled on 03130!05 because system was down upon arrival 03/34105 to 05/10/05 System down 0 0 0 0 0 Both C1 and C2 have scaling,system idle 05/10/05 to 05112!05 Air stripper,C2{lead}, 8823 0.6 0.6 0 0 1 Assume 82%Air Stripper C1 (trail) efficiency Assume 82%Air Stripper 05/12/05 to 05/13/05 Air stripper,C2 996 0.1 0.1 0 0.01 efficiency,C1 offline due to backpressure 05/13/05 to 05/16/05 System down 0 0 0 0 0 Air stripper,C2(lead), Assume 82%Air Stripper 5116!05 to 05/31/05 35260 3.1 3.1 0 0.6 C1 (trail)) efficiency I Based upon first change-out,breakthrough expected after load of 95.1 lbs to lead carbon unit Breakthrough actually occurred after estimated 47.2 lbs through stripper,3.0 lbs through C1,and 5.3 lbs through C2