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'CLE7 mob ANALYTICAL TESTING RESULTS Montgomery Ward Auto Service Center Former Unocal Branded Service Station 95098 Stockton, California parts per billion Page 6 of 14 Sample ID DTW TPH-G BENZENE I N-BUTYL 1,2-DCA EB IPB MTBE NAPHT N-PB TOLUENE 1,2,4-TMB 1,3,5-TMB XYLENES 06/24/98 _3599 65000 3670 <100 _<200 1840 <100 <200 447 134 13400 2450 633 15230 09/16/98 3893 71200 2600 <100 _ <100 2990 152 <200 598 359 7730 3250 819 15060 12/22/98 3341 43700 2610 <100 <100 1420 <100 <200 560 1 169 6060 2420 603 10870 03/18/98 3803 96000 3630_ _ 185--- <100 4194 1 146 <200 722 526 21700 ----3570 _ _978 22390 06124198_ T 3590 132000 4260 784 <200 6210 330 <200 997 1150 20600 8870 2650 33790- 09/16/98 38_77 - 119000 1900 —_<100 _<100 4220 <100 <200 338 <100 25900_--_ 3840 1160 _23570 12/22/98 3352 87200 4330 <100- <100 3830 <100 <200 902 319 16600 2900 751 20450 VEW-4 03/18/98 3800 22900 3050 <50 _<_50 1220 65 <100 390 190 465 - - 1230 420 2907 06/24/98 3568 9200 1180 <10 <50_ 173 13 _<20_ I8 _ _14 79 367 181 738_ 09/16/98 3852 _ 7110 315 — <1_0__ <1 0 150 3_4 8 <2 0_ 13 8- 504 3_8 534 234 2727 12/22/98 3_3_441_ 4240_ 271-- _<10 <10 81 11 <20 -- 30 14 42T - 118 -- 94 208 -- -_ _- � - -- --- --- - - --- -- 4444 - __ --i - -- -- - - -={-- VEW-z _ 03/18/98 - 37 55 13100 _ 2800_ _ <50 <50 1130 60 <100 I10 160 210 50_0 180 1000 06/24/98 -_- 3557 28800 1830 <50 <100 1360 60 <100 123 135 3610 _i 1080 - - 325 -4760— 09/16/9_8 3847 10300 668 50 1 449 729 48 3 <2-0 41 8 895 36 8 T 611 --283 1076 12122198— 3313 i 16000 _1870- _<10 <10 1190 79 <20 184 213 1 85 876 J- 327 - 1424 UNOCAL SITE _ MW-10 06/03/92 NM _960 72 I - NA 12 3 3 NA NA NA NA 2 NA NA 86 09/30/92_ -NM 1000 _ 26 I- NA 12 _ 46 NA NA NA NA 085 _NA _ NA 10 — 12/30/92 NM 820 25_ i NA 52 _ 53- NA NA 1 NA _NA 1 5 NA _NA— 3 6 03/25/43 NM 470 5 5 NA� 22 21 NA NA NA NA <0 50 ` NA- NA 0 62 Project No 1232 ENVIRONMENTAL AUDIT, INC N