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i • � TA6�4 _ GROUNDWATER TREATMENT SYSTEM DATA Thrifty Oaf Station# 172, Stockton, CA Discharge Average I N L E T (ug/L) OUTLET (ugtL) DATE Totalizer Discharge COMMENTS Reading Flow TPlig B T E X MTBE TPHg E� T E X MTBE (gallons) (gal/day) 4126101 0 - - - - - - - - - - Startup System 5/10101 2,970 212 58 400 13,300 10,900 1 820 6,710 2,030 <50 <018 <0 14 <018 <0 26 <0 24 5124101 8 382 387 - - - - - - - - - 7/5101 27,607 458 65,800 10,000 12,300 1,870 7,250 1,330 <50 <0 18 <0 14 <018 <0 26 <0 24 7112101 28,901 185 - - - - - - - - - 7/19101 31,822 417 - - - - - - - 7/26101 34 656 405 - - - - - - - - - - Found system off restarted 7/31/01 36,982 465 - - - - - - - - - Shut down GW system for carton change 812/O1 37,040 29 - - - - - - - - - - Restarted GW system 8/8/01 38 050 168 - - - - - - - - - 8114101 39,870 303 - - - - - - - Shut down system for QWS 8116101 39,871 1 - - - - - - - - Restarted system 8123101 43,631 537 - - - - - 8/31101 48,019 549 - - - - - - - 9/6/01 51,152 522 - - - - - - - 9112101 54,329 530 70 100 9 800 13,100 1,810 7,970 *1 1601619 <50 <0 18 <0 14 <0 18 <0 26 <0 24 9120101 58,740 551 - - - - - - - - - - 9127101 58 756 2 - - - - - 1014101 61,382 375 - - - - - - - 10/11/01 63,833 350 - - - - - 10/18/01 65,557 246 18,000 2,400 2,800 254 1,540 513 <50 <018 <0 14 <018 <0 26 <0 24 10/25/01 69,550 570 - - - - - - - - -11/2/01 72,125 322 - - - - - - - - - Shut down system for QWS 1119101 72,126 0 1 - - - - - - - - - - - Restarted system 11/14/01 72,239 23 43,000 5,300 6 350 837 2,790 '6041187 <50 <0 18 <0 14 <0 18 <0 26 <0 24 11/21/01 72,961 103 - - - - - - - - - - - 11/28/01 73 225 38 - - - - - - - - - - - Shut down GW system 12/19/01 73,225 0 337 14 4 <0 18 13 *3041287 113 <0 18 <0 14 <0 18 <0 26 *30123 Restarted system 12/27/01 77,071 1 481 - - - - - - - - NOTE Total Petroleum Hydrocarbons(TPH)analyzed by EPA Method 8015 modified for gasoltne BTEX and MTBE analyzed by EPA Method 8021 B 172 GW System Page 1 of 1 1110102