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TABLE 4 GROUNDWATER EXTRACTION SYSTEM PERFORMANCE DATA Former Chevron Seance Station 9-5775 301 West Kettleman Lane Lodi,California a s" TPFf as Gasoline Benzene Influent Bi-weeldy Aveta�e jilif ent Influent Influent Totalizer Volume l]isc�argai Borlcen- Removal Net Removed Concen- Removal Net Removed Concen- Removal Net Removed Sample Date Value- Dlsollail A,ed Rafe 0n Rate Removed To Date tration Rate Removed To Date tration Rate Removed To Date ID Sampled Notes (gallons) k- s J - Ibs/d (pounds) (pounds) lbs/da (Rounds) (pounds) Ibslda (pounds) ounds INFL 03/18/03 6,262,997 124,021 680 <50 000 004 87 <2 00000 0 001 02 15 000 002 847 INFL 04/01/03 6,398,966 135,969 669 <50 000 004 87 <2 00001 0 001 02 15 000 002 848 ]NFL 04/15/03 6,532,724 133,758 669 <50 000 004 88 <2 00000 0 001 02 16 000 002 848 INFL 05/06/03 6,735,729 203,005 668 ... 0 00 006 88 --- 00001 0 001 02 000 002 848 INFL 05/20/03 6,860,993 125,264 651 <50 000 004 89 <2 00000 0 001 02 14 000 coo 848 INFL 06/05/03 6,915,299 54,306 416 <50 000 002 89 <2 00000 0 000 02 14 000 000 848 INFL 06/18/03 7,104,669 189,370 684 <100 000 006 89 <2 00001 0 001 02 17 000 000 848 INFL 07/14/03 7,323,933 219,264 7.28 <100 000 007 90 <2 00000 0 001 02 15 coo 000 848 INFL 08/20/03 7,643,074 319,141 593 <50 000 010 91 <2 00000 0 002 02 9 000 000 848 INFL 09/16/03 7,847,864 204,790 569 <50 000 006 92 <2 00000 0 001 02 9 Goo 000 848 REPORTING PERIOD�SECQ -P QUARTs�ER 2003' w PERIOD WATER,DISCI AD, on��RGE r T-ft"i AVERAGE PERI0b,6 6CWAI4&z'R TE fpm) 114 - TOTAL POUNDSpRVED- 92 02 848 TOTAL„GACLONi REM, V'it). 1 5 0 0 13 7 RI:RIOD POuIdDS REQ E!; - 0 3 0 0 0 0 PERIOD GALLO E W D- ,, , 00 0 0 00 EXPLANATIONS Notes p911-=Micrograms per Irter a System started by Gettler Ryan gpm=Gallons per minute b Data prior to November 1 2000 collected and reported by Gettler Ryan lbs/day=Pounds per day c Weekly O&M not performed on November 15 and 22,21)00,due to system upgrades and aquifer test TPH=Total petroleum hydrocarbons d Start up of extraction well EX 3 Density of gasoline=61 pounds per gallon a 'Weekly Volume discharge volume refers to total throughput volume between 11708 to 11129 2000 Density of benzene=7 34 pounds per gallon Actual weekly discharge vaned significantly due to aquifer test performance Density of MtBE=6 18 pounds per gallon f Weekly O&M not performed on February 14 2001 Carbon vessels A B and C changed-out MtBE=Methyl terbary butyl ether system hoses changed and vessels pressure washed g Carbon Vessel A changed-out h New totalizer installed I Pump in EX 3 replaced System down approximately 2 hours ASSUMPTIONS 1) Percent carbon loading calculation assumes a loading isotherm of 3%by weight 2)Mass removal calculations assumes concentrations of one halt the detection ilmft when concentrations are reported as below detection limits 1JChevronf95775frabfeslGwe qpr As 5 of 5 I