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s y <br /> 0 <br /> TABLE 4 <br /> GROUNDWATER TREATMENT SYSTEM DATA ` <br /> Thrifty Oil Station 4172, Stockton, CA <br /> Discharge Average I N L E T (ug/L) O U T L E T {uglt_1 <br /> DATE Totalizer Discharge COMMENT$ <br /> Reading Flow TPHg B T E X MTBE TPHg B T E x MTBE <br /> (gallons} (gaVday) I T <br /> 1 <br /> 2/6102 78 932 0 37 700 5120 5,000 103 2,860 1,360 <50 2 1 <018 1 <0 24 Atter sampling shut down again <br /> 3/28/02 78,932 0 - - - - - - - - - - - System still off carbon changeout <br /> 414102 78,932 0 - - - - - - - - - Restarted system <br /> 4/11102 82,211 468 - - - - - - - - - <br /> 4118/02 82,643 62 13,600 1,270 520 482 1 610 207 <50 06 <0 14 <0 18 <0 26 <0 24 <br /> 4125102 83,486 120 - - - - - - - - System shut down(technician on vacation) <br /> 5/9/02 83,486 0 - - - - Restarted system <br /> 5123102 92,700 658 - - - <br /> 5130102 93 114 59 - - - - GW system off pipe cloak in carbon tank <br /> 6/27/02 93,114 0 - - - - - - - - - - System still off <br /> NOTE Total Petroleum Hydrocarbons(TPH)analyzed by EPA Method 8015 modified for gasoline <br /> BTEX and MTBE analyzed by EPA Method 80216 <br /> -----� <br /> 172TAB5 GW System Page 2 of 2 3/11/03 <br />