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. Table I - Summary of Ve heinical Analytical Data Unocal Service Station No 6981 4707 Pacific Avenue Stockton, California Wellhead Influent Sample Results Effluent Sample Results Date TPHg TPI1g Benzene Benzene Toluene Ethylbenzene Xylenes TPHg TPHg Benzene Benzene Toluene Ethylbenzene Xylenes (mglm) rnv) (mglm) (pp.") (mglm) (m /m) (mglm t} (m !m) pinv) (m /m) mv) (rnglm) (mglm) (m !m) 09-22-94 5,800 1,529 153 44 452 66 227 <11 <3 0108 <003 0152 <0109 0109 10-07-94 4,350 1,147 132 38 493 37 118 <11 <3 0108 <003 <0 III <0109 <0109 11-08-94 5,220 1,376 164 47 238 26 118 <11 <3 0108 <003 <0 Ill <0109 <0109 12-11-94 4,100 1,081 57 16 320 58 220 74 20 0 060 0 02 1 2 1 1 6 4 01 09-95 6,100 1,609 99 28 640 110 560 160 42 0 83 0 24 15 5 7 29 01-22-95 System shut down for modification front thermal to catalytic mode 05-16-95 7,600 2,004 130 37 580 96 330 510 134 10 2 87 30 2 9 8 4 05-23-95 System shut down due to destruction efficiency less than 95% 12-19-95 1,000 264 20 6 28 3 11 <10 <3 <0 050 <0 01 Oil <0 050 0 0089 01-24-96 5,700 1,503 56 16 540 89 440 IS 4 <0 10 <0 03 <0 10 <0 10 0 10 02-26-96 1,500 396 <10 <3 120 20 93 58 15 <0 10 <0 03 030 <0 10 3 1 03-26-96 1,800 475 UO <3 150 30 150 26 7 <0 10 <0 03 <0 10 <0 10 0 71 04-23-96 1,600 422 <0 10 <0 03 160 38 180 <10 <3 <0 10 <0 03 <0 10 <0 10 059 05-28-96 1,300 343 <20 <0 6 96 34 170 33 9 <0 10 <0 03 <0 10 <0 10 0 19 06-25-96 3,200 844 <10 <3 210 89 480 16 4 <0 10 <0 03 0 29 0 10 0 57 07-3096 7,700 2,030 <10 <3 460 250 1,500 62 16 0 14 0 04 2 1 1 4 9 8 08 30-96 6,800 1,793 <10 <3 490 170 1,100 1,400 369 <1 0 <0 29 67 37 270 09-25-96 5,300 1,398 <10 <3 160 140 1,000 15 4 <0 10 <0 03 0 13 <0 10 1 1 10-28-96 1,900 501 <50 <1 40 45 310 18 5 <0 10 <0 03 0 13 0 13 068 1-21-96 220 58 <0 50 <0 1 7 6 2 5 11 12 3 0 11 0 03 0 21 0 12 0 87 12-20-96 1,600 422 <1 0 <03 29 I6 76 38 10 <0 10 <0 03 <0 10 0 16 1 0 01-29-97 1,000 264 <50 <14 11 27 180 <10 <3 <010 <003 <010 <010 <010 02-27-97 1,500 396 <1 0 <03 3 4 32 260 100 26 <0 50 0 14 <0 50 0 66 7 0 03-01-97 System down due to mechanical problems 04-01-97 System startup after repair and mamtenence 04-24-97 940 248 <0 50 <0 14 1 6 22 190 56 15 <0 10 <0 03 <0 10 069 7 0 05-31-97 1,800 475 <1 0 <03 1 7 34 310 <10 <3 <0 10 <0 03 <0 10 <0 10 0 80 06-24-97 I,800 475 <5 0 <1 4 <50 28 280 12 <3 <0 10 <0 03 <0 10 <0 10 0 35 mg/ms = milligrams per cubic meter ppmv = parts per nullion by volume TPHg a Total Petroleum Hydrocarbons as gasoline d/unoeal/4855/698IRPT X[S 785520-3