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Table 2 Groundwater Extraction Hydrocarbon Removal 7-Eleven Facility 32262 2360 West Grant Line Road Tracy California TPH as Gasoline Benzene MtBE Cumulative Calculated Calculated Calculated Totalizer Hours Average Influent Removal Net Influent Removal Net Influent Removal Net Sample Sample Time Reading Gallons Extracted Flow Rate Concentration Rate Removed Concentration Rate Removed Concentration Rate Removed ID Date (gallons) Extracted (hours) (gpm) (ug/1) (lbslday)o (Ibs)° (ug") (lbs/day)' (lbs)h (jjgA) (lbslday)° (Ibs)° EX-1 08/11/04 950 1 329 0 — — - — — — — 08/12/04 830 1 524 195 — — <1,000 - — <20 — — 7,400 — — 08/12/04 1000 1,524 0 00 -- — — — — — — 08/13/04 1000 2,590 1 066 240 074 — — -- -- — — 081131D4 1200 2,590 1,261 — — <2 000 001 0 016 <10 00001 00002 5,400 0 057 0 067 EX-1 09/12/05 10 23 0 4 — -- <90 — — <0 90 — — 360 — -- 09/12105 1055 4 4 — 080 — — — — — — - — 09/13/05 1005 1 092 1,088 22 075 -- -- -- — — — — — — 09/13/05 1615 1 355 1 351 28 070 — — — — — — — 09/14/05 730 1 969 1 965 43 065 — — — — — — — — — 09/14/05 1430 2 232 2 228 50 070 — — — — — — — — — 09/15/05 615 2 846 2 842 66 065 -- — — — — — — — 09/15105 21 30 3,424 3,420 81 070 — — — — — — — - -- 09/16/05 1 35 3 574 3,570 86 065 510 000 0 008 <2 0 00000 00000 1,100 0 006 0 022 PERIOD POUNDS REMOVED 001 00000 0 022 PERIOD GALLONS REMOVED 3,570 0 001 0 00000 0 003 TOTAL POUNDS REMOVED 002 00002 0 089 TOTAL GALLONS REMOVED 1,261 0 004 000002 0 012 Definitions gpm =US Gallons per minute ugA =Micrograms per liter TPH =Total Petroleum Hydrocarbons lbs =Pounds MtBE =Methyl-tertiary-butyl ether Notes a Calculated removal rate is the influent concentration times the average flaw rate b Net removed is the influent concentration times the gallons extracted Values reported as less than the reporting limit were assumed to be zero for calculation purposes 117-ElevenV-11 StoreM322621Tables132262 GW Extraction Hydrocarbon Removal As Page 1 of 1