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TABLE 7 SOIL VAPOR EXTRACTION SYSTEM EMISSION DATA Former Chevron Service Station 9-5775 301 West Kettleman Lane Lodi, California Sample ID Date Sampled Hour Meter Reading (hours) Notes TPH as Gasoline Effluent Effluent Blower Average Concen-EmissionDestructionConcen- Vacuum Flow Rate tration Rate Efficiency tration ("H2O) (sof m) (ppmv) (lbs/day) (percent) (ppmv) Benzene Emission Destruction Rate Efficiency (lbs/day) (percent) EFFL 04/03/02 14,788 40 -- -- 0.0 100.0% 0.000 100.0% EFFL 04/09/02 14,930 40 103.11 -- 0.1 100.0% 0.001 100.0% EFFL 04/19/02 15,168 40 103.11 0.1 100.0% -- 0.001 100.0% EFFL 04/23/02 15,263 40 98.20 0.1 100.0% -- 0.001 100.0% EFFL 04/30/02 15,431 40 98.20 <5.0 0.1 100.0% <0.050 0.001 100.0% EFFL 05/07/02 15,559 40 98.20 •- 0.1 100.0% -• 0.001 100.0% EFFL 05/14/02 15,766 40 103.11 0.1 100.0% 0.001 100.0% EFFL 05/21/02 15,934 40 98.20 0.1 100.0% - 0.001 100.0% EFFL 05/29/02 16,127 40 103.11 <5.0 0.1 100.0% <0.050 0.001 100.0% EFFL 06/04/02 16,271 40 108.02 -- 0.1 100.0% -- 0.001 100.0% EFFL 06/11/02 16,439 40 103.21 0.1 100.0% 0.001 100.0% EFFL 06/18/02 16,609 40 108.02 0.1 100.0% 0.001 100.0% EFFL 06/25/02 16,775 40 108.02 <5.0 0.1 100.0% <0.050 0.001 100.0% EFFL 07/02/02 16,943 40 108.02 -• 0.1 100.0% -- 0.001 100.0% EFFL 07/16/02 17,276 40 108.02 <5.0 0.1 100.0% <0.050 0.001 100.0% EFFL 07/30/02 17,358 40 108.21 -- 0.1 100.0% -- 0.001 100.0% EFFL 08/13/02 17,949 40 103.11 <5.0 0.1 100.0% <0.050 0.001 100.0% EFFL 08/28/02 18,309 40 103.11 -- 0.1 100.0% -- 0.001 1100.0% EFFL 09/12/02 19,671 40 98.20 <5.0 0.1 100.0% <0.050 0.001 100.0% EFFL 09/24/02 19,960 40 88.10 -- 0.1 100.0% -- 0.001 100.0% EFFL 10/08/02 19,297 d 40 98.21 0.1 100.0% 0.001 100.0% EFFL 10/22/02 19,297 d -- -- 0.0 100.0% 0.000 100.0% EFFL 11/05/02 19,297 d -- -- 0.0 100.0°% 0.000 100.0% EFFL 11/20/02 19,2997 d - -- 0.0 100.0°% -- 0.000 100.0% EFFL 12/03/02 19,297 d 0.0 100.0% -- 0.000 100.0% EFFL 12/17/02 19,297 d - 0.0 100.0°% -- 0.000 100.0% EFFL 01/21/03 19,391 40 108.21 <5.0 0.1 100.0% <0.050 0.001 100.0% EFFL 02/04/03 19,728 40 117.31 <5.0 0.1 100.0% <0.050 0.001 100.0% EFFL 03/05/03 20,426 40 108.21 <5.0 0.1 100.0% <0.050 0.001 100.0% EFFL 04/08/03 21,072 40 103.11 <5.0 0.1 100.0°% <0.050 0.001 100.0°% EFFL 05/06/03 21,910 40 98.21 <5.0 0.1 100.0% <0.050 0.001 100.0% EFFL 06/18/03 22,748 67 108.00 <1.0 0.1 100.0% <0.5 0.001 100.0% EFFL 07/14/03 23,356 115 111.00 <1.0 0.1 100.0°% <0.5 0.001 100.0°% EFFL 08/20/03 24,227 40 101.00 <1.0 0.1 100.0% <0.5 0.001 100.0% ExplsnnUons. sdm = Standard cubic feet per minute ppmv = Parts per million by volume lbs = Pounds TPH - Total Petroleum Hydrocarbons "H20 = Inches of water = Not measured Nates: a. Data for 7110100 appears to be the result of laboratory error, Does not match previous or subsequent analytical data. b. Influent sample for 7/26(00 was not analyzed for TPHg or 8TEX c. Data prior to 1111/00 was reported by Gettler-Ryan Inc. d. SVE system shut down 4002. I:/Chevron/95775/Tables[SVE 0 Tablesl.xls 2 of 2