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<br /> WELL CONCE TRATIONS
<br /> Shell-branded Service Station
<br /> 6131 Pacific Avenue
<br /> Stockton, CA
<br /> Wic #204-7525-0104
<br /> MTBE MTBE Depth to Depth to GW SPH DO
<br /> Well ID Date TPPH B T E X 8020 8260 TOC Water SPH E{evation Thickness Reading
<br /> (u IL) (u ILu IL (u IL (ug/L) {u IL) uglL) (MSL ft ft) MSL (ft ( m)
<br /> MW-3 06/10/1997 570 37 30 37 13 49 NA 1 10165 4070 NA 6095 NA NA
<br /> MW-3 08/22/1997 4,300 290 640 87 670 87 NA 10165 4190 NA 5975 NA NA
<br /> MW-3 10/09/1997 1,400 11 41 13 100 17 ND 10165 4198 NA 5967 NA NA
<br /> MW-3 02/10/1998 24,000 3,900 3,300 540 2,300 860 ND 10165 3920 NA 6245 NA NA
<br /> MW-3 05/20/1998 4,100 710 400 130 440 240 ND 10165 3586 NA 6579 NA NA
<br /> MW-3 07/29/1998 <5,000 970 120 79 210 <250 30 10165 3619 NA 6546 NA NA
<br /> MW-3 11/23/1998 370 64 13 42 33 28 20 101 65 3542 NA 6623 NA NA
<br /> MW-3 02/24/1999 30,000 4,400 5,100 660 3,600 1,400 <83 4 10165 3385 NA 6780 NA NA
<br /> MW-3 05/13/1999 996 155 324 224 692 388 <2 00 10165 3298 NA 6867 NA NA
<br /> MW-3 08/20/1999 <50 0 <0 500 <0 500 <0 500 122 <5 00 <2 00 10165 3520 NA 6645 NA NA
<br /> MW-3 11/02/1999 7,490 273 1 550 1 196 1 1,160 618 NA 10165 3493 NA 6672 NA NA
<br /> 02/03f2bQ 19 1 C 0��0 v�162� 'x2250` x R a=`�5F};'II$ 7 B8 W I �Ah a A
<br /> MW4 10/10/1997 6,800 1,900 990 150 430 170 57 10027 4222 NA 5805 NA NA
<br /> MW4 02/10/1998 92,000 22,000 17,000 2,100 5,100 2,500 260 10027 3783 NA 6244 NA NA
<br /> MW4 05/20/1998 70,000 17,000 12,000 1,400 3,500 <2,500 ND 10027 3485 NA 6542 NA NA
<br /> MW-4 07/29/1998 23,000 8,800 1,300 730 700 <500 170 10027 3503 NA 6524 NA NA
<br /> MW-4 11/23/1998 44,000 12,000 7,200 970 2,300 <1,000 160 10027 3442 NA 6585 NA NA
<br /> MW4 02/24/1999 49,000 12,000 8,000 990 2,800 1,300 180 10027 3255 NA 6772 NA NA
<br /> MW-4 05/13/1999 41,800 8,040 5,040 726 1,880 <1,000 154 10027 3221 NA 6806 NA NA
<br /> MW4 08/20/1999 9,150 2,530 700 228 279 <250 672 10027 33 60 NA 6667 NA NA
<br /> MW-4 11/02/1999 1 19,800 6,980 3,450 577 1,160 584 NA 100 27 3393 NA 66 34 NA NA
<br /> �� 12 8, 8 5 X1,'!30, 25b NA6 70 AT
<br /> 3 _ SNA
<br /> MW-5 10/10/1997 1,300 91 33 30 65 12 ND 10025 4153 NA 5872 NA NA
<br /> MW-5 02/10/1998 1,000 100 64 <5 0 29 <25 110 10025 3748 NA 62 77Z NA NA
<br /> MW-5 05/20/1998 72 059 <0 50 <0 50 <0 50 <2 5 ND 10025 3440 NA 6585 NA NA
<br /> Page 5
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