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Tab Sod Vapor Extraction5 stem Emission Data ARCO Service Station#2093 3425 Tracy Boulevard,Tracy,California TPH as Gasoline Benzene Effluent Effluent Hour Meter Slower Average Concen- Emission Destruction Concen- Emission Destruction Sample Date Reading Vacuum Flow Rate tration Rate Efficiency tration Rate Efficiency 1D Sampled (hours) f-1-120) (scfm) (ppmv) (lbs/day) (percent) (ppmv) (lbs/day) (percent) EFFL 12/15/95 4,014 11 100 -- -- -- -- — — EFFL 01/04/96 4,538 11 95 34 13 977% — — — EFFL 01/26/96 4,765 SO 95 47 18 949% -- — — EFFL 02!26196 4,716 45 75 25 08 965% — — — EFFL 03/27/96 5,231 44 75 25 08 965% -- -- -- EFFL 04/15/96 5,380 44 74 4 01 994% -- -- -- EFFL 05/02/96 5,631 44 76 4 01 994% -- -- -- EFFL- 05/15/96 5,819 47 60 13 03 977% -- -- -- EFFL 06/03/96 5,856 45 63 1 00 998% — — — EFFL 06/21/96 5,982 34 70 8 02 985% -- -- -- EFFL 07/10/96 5,039 30 65 11 03 982% — — — EFFL 08/12/96 6,219 16 68 81 22 919% — — EFFL 09/16/96 6,265 14 80 15 05 979% — — EFFL 10/08/95 6,760 25 60 4 01 992% -- EFFL 11/05/96 6,954 35 60 0 00 1000% -- EFFL 12120/96 7,387 32 63 2 00 969% — — EFFL 01/13/97 7,390 28 60 0 00 1000% — — — EFFL 06/18/97 7,566 68 45 1 00 997% -- — — EFFL 07/24/97 7,587 48 50 4 01 984% — — — EFFL 08/28/97 7,588 45 60 0 00 1000% — EFFL 09/10/97 7,607 45 55 8 02 963% — — EFFL 10115/97 7 630 30 60 9 112 95 7% -- - EFFL 11/17/97 7,654 30 60 7 02 961% -- - - EFFL 12131/97 7,847 40 65 10 02 947% — — EFFL 05/28/98 7,847 60 40 10 02 998% 005 0 001 997% EFFL 06/11/98 8,143 50 105 10 04 985% -- 0 000 scfm =Standard cubic feet per minute ND =Not detected ppmv =Parts per million by volume a =Prior to April 1998 data was collected and reported by Brown and Caldwell lbs =Pounds b =TPH-g and benzene concentrations reported as ND are taken as 0 ppmv =Not applicable or not analyzed for calculation purposes 7G011-001-0110&M Tables As/TABLE 2 August 5,1998