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• Table 1 - Summary of VE*emical Analytical Data Unocal Service Station No 6981 _ 4707 Pacific Avenue Stockton, Caltforrua Wellhead Influent Sample Results Effluent Sample Results Date TPHg TPHg Benzene Benzene Toluene Ethylbenzene Xylenes TPHg TPHg Benzene Benzene Toluene Ethylbenzene Xylenes (mg/m') (PPmv) (mglm') (PPmv) (mg/ml) (mg/m') (mg/m') (mg/m) (ppmv) (mg/m) (ppmv) (mem') (m€/m) (mglm') 09-22-94 5,800 1,529 153 44 452 66 227 <11 <3 0108 <0 03 0 132 <0 149 0 109 10-07-94 4,350 1,147 132 38 493 37 118 <11 <3 0 l08 <0 03 <0 111 <0 109 <0 109 11-08-94 5,220 1,376 164 47 238 26 118 <11 <3 0 108 <0 03 <0 ill <0 109 <0 109 12-11-94 4,100 1,081 57 16 320 58 220 74 20 0 060 002 12 1 1 64 01-09-95 6,100 1,609 99 28 640 120 560 160 42 083 024 15 57 29 01-22-95 System shut down for modification from thermal to catalytic mode 05-16-95 7,600 2,004 130 37 580 96 330 510 134 10 287 30 29 84 05-23-95 System shut down due to destruction efficiency less than 95% 11 <1Q <3 <0 OSQ <0 Ol Oil <4 050 0 40$9 12-19-95 1,000 264 20 6 28 3 01-24-96 5,700 1,503 56 16 540 89 440 15 4 <0 10 <0 03 <0 10 <0 10 010 02-26-96 1,500 396 <10 <3 120 20 93 58 15 <0 10 <0 03 030 <0 to 31 03-26-96 1,804 475 <10 <3 150 30 150 26 7 <0 10 <0 03 <0 10 <0 10 071 04-2396 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 <2 0 <0 6 96 34 170 33 9 <0 10 <0 03 <0 10 <0 10 019 06-25-96 3,200 844 <10 <3 210 89 480 16 4 <0 10 <0 03 029 oto 057 07-30-96 7,700 2,030 <10 <3 460 250 1,500 62 16 014 004 21 14 98 08-30-96 6,800 1,793 <10 <3 490 170 1,100 1,400 369 <1 0 <0 29 67 37 270 09-2596 5,300 1,398 <10 <3 160 140 1,000 15 4 <0 10 <0 03 013 <0 10 11 10-28-96 1,900 501 <5 0 <1 40 45 310 18 5 <0 10 <0 03 0 13 013 068 11-21-96 220 58 <0 50 <0 1 76 2 5 11 12 3 Oil 003 021 012 087 12-20-96 I,600 422 <10 <0 3 29 16 76 38 10 <0 10 <0 03 <0 10 016 10 01-29-97 1,000 264 <5 0 <1 4 11 27 180 <10 <3 <0 10 <0 03 <0 10 <0 10 048 02-27-97 1,500 396 <1 0 <0 3 34 32 260 100 26 <0 50 0 l4 <50 066 70 03-01-97 System down due to mechanical problems 04-01-97 System startup atter repair and mamtenence 04-24-97 940 248 <0 50 <0 14 16 22 190 56 15 <0 10 <0 03 <0 10 069 70 05-31-97 1,800 475 <1 0 <0 3 17 34 310 <10 <3 <0 10 <0 03 <0 10 <0 10 080 06-24-97 1 800 475 <5 0 <14 <5 0 28 280 12 3 <0 10 <0 03 <0 10 <0 10 035 07-31-97 S00 211 <0 50 <0 1 068 21 190 12 3 <0 10 <0 03 <0 10 <0 10 1 1 09-28-97 980 258 <1 0 <0 3 <10 15 160 <10 <3 <0 10 <0 03 <0 10 <0 10 061 09-28-97 1,500 396 <10 <0 3 <10 18 170 <10 <3 <010 <0 03 <010 <0 10 <010 10-26-97 System found to be down due to failure of the flame detector For Explanation refer to page 2 785520-3 d/unocal/4855/698IRPTX S