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Table X - Summary of VEMhemical Analytical Data Unocal Serviceation No 6981 ` 4707 Pacific Avenue Stockton, California Wellhead Influent Sample Results Effluent Sample Results Date TPHg TPHg Benzene Benzene Toluene Ethylbenzene Xylenes TPHg TPHg Benzene Benzene Toluene Ethylbenzene Xylenes (mg/m3) (PPmv) (mg/m3) (PPmv) (mg/m3) (mg/m3) (mg/m3) (mg/m3) (PPmv) (mg/m3) (PPmv) (mSlm3) (mg/m3) (mg/m3) 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 ill <0109 <0109 11-08-94 5,220 1 376 164 47 238 26 118 <11 <3 0 108 <0 03 <0 111 <0 109 <0 109 12-11-94 4 100 1 081 57 16 320 58 220 74 20 0 060 0 02 12 1 1 6 4 01-09-95 6,100 1,609 99 28 640 120 560 160 42 0 83 024 15 5 7 29 01-22-95 System shut down for modification from thermal to catalytic made 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 <001 0 11 <0 050 00089 01-24-96 5,700 1,503 56 16 540 89 440 15 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 <10 <3 150 30 150 26 7 <0 10 <0 03 <0 10 <0 10 071 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 <06 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 0 10 0 57 07-30-96 7,700 2,030 <10 <3 460 250 1,500 62 16 014 004 2 1 1 4 9 8 08-30-96 6800 1793 <10 <3 490 170 1 t00 1400 369 <10 <029 67 37 270 09-25-96 5,300 1398 <10 <3 160 140 1,000 15 4 <010 <003 013 <010 11 10.28-96 1,900 501 <5 0 <1 40 45 310 18 5 <0 10 <0 03 0 13 0 13 068 11-21-96 220 58 <0 50 <0 1 7 6 2 5 11 12 3 0 11 0 03 021 012 087 1220-96 1,600 422 <1 0 <03 29 16 76 38 10 <0 10 <0 03 <0 10 016 1 0 01-29-97 1,000 264 <5 0 <1 4 it 27 180 <10 <3 <0 10 <0 03 <0 10 <0 10 0 48 02-27-97 1,500 396 <1 0 <0 3 3 4 32 260- 100 26 <0 50 014 <0 50 0 66 7 0 03-01-97 System down due to mechanical problems 04-01-97 System startup after repair and mauttenence 04-24-97 940 248 <0 50 <0 14 1 6 22 190 56 15 <0 10 <0 03 <0 10 0 69 70 05-31-97 1,800 475 <1 0 <03 17 34 310 <10 <3 <0 10 <0 03 <0 10 <0 30 0 80 06-24-97 1,800 475 <5 0 <1 4 <5 0 28 280 12 3 <0 10 <0 03 <0 10 <0 10 0 35 07-31-97 800 211 <0 50 <0 1 068 21 190 12 3 <0 10 <0 03 <0 10 <0 10 1 1 08-28-97 980 258 <10 <0 3 <10 15 160 <10 <3 <0 10 <0 03 <0 10 <0 10 061 09-28-97 1,500 396 <1 0 <0 3 <1 0 18 170 <10 <3 <0 10 <0 03 <0 10 <0 10 <0 10 10-26-97 lSystem found to be down due to failure of the flame detector Por Explanation refer to page 2 d/unocal/4855ho6981 x1s 140124 04