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h Ta0 Soil Vapor Extraction System Performance Data ARCO 4932 16 East Harding Way Stockton California TPH as Gasoline Benzene MtBE Well Field Well Feld FID Influent Influent M1BE Hour Meter Dilution Blower Manifold Manifold Well Feld Well Field Concen-Removal Net Removec Concern Removal Net Removed Concen- Removal Net Removed Sample Date Reading Valve Vacuum Vacuum Temperature Flow Rate Flow Rate Influent Efflueni tration Rate Removed to Date tration Rate Removed to Date tration Rate Removed to Date ID Sampled (hours) (%Open) (Hg) (H2O) (°F) (acfm) (scfm) (ppmv) (ppmv) (ppmv) (lbs/day) (pounds) (pounds) (ppmv) (lbs/day) (pounds) (pounds) (pprrrv) (lbs/day) (pounds) (pounds) — 05/14/03 a 1 0 100% 50 000+ 0 0 0 0 0 0 0 0 0 0 0 0 INF 05/29/03 b c 252 0% 13 402 1502 135 48 000 1 1 16 000 811 409 409 190 76 38 38 2 100 95 48 48 INF 07/06103 d 260 2% 200 — 1372 120 20 000 1 1 17,000 766 26 435 200 71 025 41 4200 169 44 52 INF 08/07/03 3987 0% 10 60 82 t 2062 169 43,5000 21 6100 385 8 936 9 371 24 12 65 69 210 12 1 403 1 455 09/05/03 e - - - - INF 09/09/03 f 1 020 8 0% 15 136 801 1627 104 7 800 0 00 2 900 113 6 459 15 831 <3 2 01 17 86 28 1 0 166 1 621 10/09/03 1 724 3 0% 155 -- 650 0 1993 17 823 2 88 32 1 653 INF 10/23/03 2,055 8 0% 13 — 138 98 1 500 0 620 23 939 18 762 <16 00 1 89 37 12 15 1 668 10/29/03 2 203 6 01/6 14 165 117 1 100 25 260 19 022 — 0 89 5 1 673 11/05/03 2,251 5 01% 14 110 78 1 000 45 84 19 107 — 0 89 1 1 674 INF 11/13/03 g 2 325 6 01/6 15 80 T71 176 7 137 1 1800 00 1 200 62 130 19 237 <16 01 0 89 <56 0 3 2 1 676 INF 12/03/03 2 804 9 0% 15 140 1900 121 3,8000 00 630 28 901 20 138 <016 00 1 90 1 9 01 3 1 680 REPORTING PERIOD Fourth Quarter 2003(919/2003 to 1213x1003) TOTAL POUNDS REMOVED 20,138 90 1,680 TOTAL GALLONS REMOVED 3,301 12 272 PERIOD POUNDS REMOVES) 4,3075 4 5 64 PERIOD GALLONS REMOVED 7061 06 11 TOTAL AVG FLOW RATE 120 scfm OTAL,PERCENTOPERAT10NAL 78% PERIOD PERCENT_OPERATEONAL 87% Definitions Chemical Properties sctm=Standard cubic feet per minute Standard conditions 60°F 1 atm lbs=Pounds Vapor density of gasoline=0 26 pounds per cubic feet(assumes molecular weight of gasoline Is 100 pounds per pound mole) —=Data not available Vapor density of benzene=0 206 pounds per cubic feet pprrry=Parts per million by volume Vapor density of MtBE=0232 pounds per cubic feet TPH=Total petroleum hydrocarbons Liquid density of benzene=7 34 pounds per gallon Hg=Inches of mercury Liquid density of gasoline=6 1 pounds per gallon FID=Fame Ionization Detector Liquid density of MtBE=6 18 pounds per gallon Notes a System start up and shake-down b Source test for San Joaquin Valley Unified Air Pollution Control District performed c Analyte values given were analyzed beyond the EPA recommended holding time The analysis was performed because the original analysis detected an analyte in the associated blank as well as in the sample d Pormananent system start up e SVE system shut down due to a car running Into the compound f SVE system restarted Ig Autodialer installed I IARCOu4MO d MARCO 4932 0$M TaMOS 4CM x15 Page 1 of 1