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S ! *e I of 1 Table A-1 Soil Vapor Extraction System Performance Data ARCO Service Station#2133 2908 Benjamin Holt Drive,Stockton,California TPH as Gasoline Benzene Fib Influent Influent Hour Meter Blower Average Concen- Removal Net Removed Concen- Removal Net Removed Sample Date Reading Vacuum Flow Rate Influent Effluent tration Rate Removed to Date tration Rate Removed to Date ID Sampled (hours) ("H2O) (scfm) (ppmv) (ppmv) (ppmv) (lbs/day) (pounds) (pounds) (ppmv) (lbs/day) (pounds) (pounds) INFL 01/25/00 -- a - -- 4,815 60.4 INFL 02/15/00 - - - 4,815 60.4 INFL 03/14/00 - b 30 132 5 0 3.92 0.2 0.0 4,815 0.08 0.003445 0.0 60.4 INFL 04/03/00 0 c 40 197 4 0 NO 0.0 1.0 4,816 0.03 0.001859 0.03 60.4 INFL 04/26/00 552 26 188 2 0 NO 1.0 4.8 4,821 0.02 0.001328 0.02 60.4 INFL 05/25/00 704 40 167 4 0 NO 0.0 9.5 4,825 0.04 0.001836 0.05 60.5 ]NFL 06/29/00 1,544 41 187 9 0 4.33 0.3 1.5 4,827 ND 0 0.03 60.5 INFL 07/27/00 2,053 47 246 22 0 30.70 3.0 35.4 4,862 0.48 0.036976 0.39 60.9 INFL 08/31/00 2,529 70 170 6 0 NO 0.0 29.9 4,892 0.03 0.001339 0.38 61.3 INFL 09/27/00 3,177 41 195 7 0 NO 0.0 0.0 4,892 NO 0 0.02 61.3 INFL 10/23/00 3,804 d 30 329 0 0 NO 0.0 0.0 4,892 NO 0 0.00 61.3 INFL 11/20/00 3,804 d - -- 0 0 - 0.0 0.0 4,892 - 0 0.00 61.3 INFL 12/14100 3,804 d - - 0 0 -- 0.0 0.0 4,892 - 0 0.00 61.3 INFL 01/16/01 3,804 d -- - 0 0 - 0.0 0.0 4,892 - 0 0.00 61.3 INFL 02/13/01 3,805 a 40 175 11 0 NO 0.0 0.0 4,892 0.02 0.001204 0.00 61.3 ]NFL 03/01/01 3,958 d -- - 11 0 0.0 0.0 4,892 - 0.001204 0.01 61.3 04103101 SUES shut down REPORTING PERIOD:FOURTH QUARTER 2004 TOTAL POUNDS REMOVED: 4,897.2 61.3 TOTAL GALLONS REMOVED: 802.8 8.4 PERIOD POUNDS REMOVED: 0.0 0.0 PERIOD GALLONS REMOVED: 0.0 0.0 PERIOD AVG FLOW RATE: 175 PERIOD PERCENT OPERATIONAL: 0% scfm =Standard cubic feet per minute a. Data prior to 1998 was reported by Brown&Caldwell lbs =Pounds b. System startup - =Not available or not applicable c. Hour meter installed 413100 NO =Non-detectable above detection limit d. SVE system turned off due to low influent concentrations. ppmv =Parts per million by volume e. SVE restarted. TPH =Total petroleum hydrocarbons Density of benzene=7.34 pounds per gallon FID =Flame Ionization Detector Density of gasoline=6.1 pounds per gallon "H20 =Inches of water 77SP.52133.00.019010&M Tables 4Q04/Table A-1