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SUMMARY OF GROUNDWATER ATION AND ANALYTICAL DATA <br /> STOCKTON MAINTENANCE STATION <br /> STOCKTON,CALIFORNIA <br /> Depth To Groundwater TPH-G TPH-A Benzene Toluene Ethyl- benzene Total MTBE <br /> well 1 D Date TOC Elevation Groundwater Elevation (µg11) W) (119/1) (ILIA) g11)IA) (µ ��) (µgn) <br /> MW-1 04/06/1992 2149 6596 4447 4 900 180' 1,100 360 <3 400 --- <br /> MW-1 10/22/1993 21 49 6792 4643 27 000 --- It 000 1 500 <50 1,400 --- <br /> MW-1 06/01/1994 21 49 6568 4419 1 500 <50 13 700 418 14 5 206 — <br /> MW-1 03106/1995 2149 6501 4352 2200 280 150 75 13 71 --- <br /> MW-Idup 03/06/1995 2149 6501 4352 2 300 — 150 80 13 71 <br /> MW-1 03/08/1995 21 49 6503 4354 — — — --- --- — <br /> MW-1 05/02/1995 2149 6418 4269 1 — - --- --- — — <br /> MW-1 05/05/1995 21 49 -- — 2 900 <50 240 110 13 t00 — <br /> MW 1 02/0611996 2149 6203 -40 54 2200 <50 280 130 30 110 t00 <br /> MW 1 04/11/1996 2149 6123 -3974 -- --- --- — -- — — <br /> MW-1 04/23/1996 2149 6098 3949 4200 680 1 100 300 123 1 300 25 <br /> MW 1 07/02/1996 21 49 5992 -3843 51 000 2 600 10 100 7200 1,100 6 600 38 <br /> MW-1 10/23/1996 21 49 60 16 -3867 1 700 87 440 37 49 70 32 <br /> MW 1 05/29/1997 21 49 55 16 -3367 1 700 <500 210 7 36 22 4 <br /> MW 1 1022/1997 2149 57 53 36 04 720 <500 IS 58 2 7 3 26 <br /> MW I 1229/1997 2149 5672 -3523 60 <5000 0 59 18 <0 5 17 <5 <br /> MW-1 03/16/1998 2149 53 31 -3182 70 90 21 23 <0 5 2 1 <5 <br /> MW-1 0626/1998 21 49 4948 2799 <500 <5000 <0 3 <0 3 <0 3 <0 6 (<5) <br /> MW-1 0928/1998 2149 5136 -2987 <500 <5000 <0 3 <0 3 <0 3 <0 6 <0 6(<5) <br /> MW-I 12/02/1998 21 49 4948 -2799 <500 <400 50 4 0 16 14 <1 0(<I 0) <br /> MW-1 04/01/1999 2206 4595 -23 89 <100 <100 <0 1 <0 2 <0 I <0 I <0 6 <br /> mW-1 0625/1999 2206 4634 -2428 <100 <100 2 26 <0 2 <0 2 ]6 <0 6 <br /> IN72 2F�Lw.,S Page I of 9 <br />