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TABLE 1 GROUNDWATER MONITORING AND CHE141CAL RESULTS FORMER REGAL STATION 643, 6425 PACIFIC AZENEUE STOCKTON, CALIFORNIA WELL # CASING TOP OF DATE DEPTH TO PROD VACUUM CORRECTED TOTAL PET BENZENE TOLUENE ETHYL XYLENES Methyl tert-Butyl DISSOLVED ELEVATION SLOT TOP OF THICK AT WELL GW ELEV HYDROCARB BENZENE Ether OXYGEN FEET AMSL FEET AMSL WATER HEAD FT AMSL GAS-RANGE SC20 8260 IN FEET IN FEET IN FEET PPB PPB PPB PPB PPB PPB PPB PPM MW-6 9 88 -2S 12 04/12/99 50 36 0 -40 48 MW-6 05/04/89 0 <500 17 <0 5 <0 5 <0 5 MW-6 9 Be -25 12 05/22/a9 51 0 -41 12 MW-6 9 Be -25 12 08/24/99 53 46 0 -43 58 <1000 200 <la <10 <10 MW-6 9 88 -25 12 10/10/99 S3 48 0 -43 60 MW-6 9 86 -25 12 11/02/49 54 47 0 -44 59 MW-6 9 BB -25 12 12/01/99 54 32 0 -44 44 MW-6 9 Be -25 12 01/12/90 53 17 0 -43 29 <50 11 2 <0 3 3 MW-6 9 BB -25 12 03/19/90 52 94 0 -43 06 MW-6 9 88 -25 12 02/26/90 53 08 0 -43 20 MW-6 9 Be -25 12 05/25/90 53 25 0 -43 37 10/90* 3000 200 <30 <90 MW-6 9 as -25 12 11/27/90 54 52 0 -44 64 1300 2900 180 <15 130 MW-6 9 88 -25 12 03/29/91 54 68 0 -44 80 400 160 91 <0 3 240 MW-6 9 BB -25 12 06/27/91 54 98 0 -45 10 850 2100 360 3 390 MW-6 9 88 -25 12 09/18/91 54 91 0 -45 03 690 1500 220 <3 310 Mw-6 9 B8 -25 12 12/17/91 $4 35 0 -44 47 240 110 14 <0 3 17 MW-6 9 Be -25 12 01/21/92 53 74 0 0 002 -43 86 MW-6 9 88 -25 12 02/04/92 53 52 0 0 -43 64 MW-6 9 88 -25 12 03/10/92 53 3 0 0 -43 42 <50 1 3 <0 3 <0 3 <0 9 MW-6 9 Be -25 12 04/29/92 53 64 0 0 -43 76 MW-6 9 88 -2S 12 06/18/92 S4 45 0 0 -44 57 <50 <0 3 <0 3 <0 3 <0 S Mw-4 9 Be -2S 12 07/16/92 54 66 0 0 -44 78 MW-6 9 88 -25 12 08/14/92 55 16 0 0 -45 28 MW-6 9 88 -25 12 09/22/92 55 16 0 0 -45 28 <50 <0 3 <0 3 <0 3 <4 9 MW-6 9 Be -25 12 09/25/90 55 68 0 0 007 -45 81 MW-6 12 01 -22 99 10/08/92 55 8 0 0 02 -43 81 MW-6 12 01 -22 99 11/11/92 55 38 0 0 01 -43 38 MW-6 12 01 -22 99 12/09/92 55 04 0 0 01 -43 04 <50 <0 3 <0 3 <0 3 <0 9 MW-6 12 01 -22 99 01/15/93 54 42 0 0 00 -42 41 MW-6 12 01 -22 99 02/08/93 54 46 0 0 20 -42 65 MW-6 12 01 -22 99 01/11/93 53 32 0 0 03 -41 34 <50 <0 3 <0 3 <0 3 <0 9 MW-6 12 01 -22 99 04/15/93 52 5 0 0 01 -40 50 MW-6 12 01 -22 99 05/18/93 51 52 0 0 02 -39 53 MW-6 12 01 -22 99 06/14/93 S1 66 0 0 02 -39 67 <50 <0 3 <0 3 <0 3 <0 9 MW-6 12 01 -22 99 07/19/93 51 53 0 0 02 -39 54 MW-6 12 01 -22 99 0$/10/93 51 82 0 0 02 -39 83 MW-6 12 01 -22 99 09/23/93 51 92 0 0 01 -39 92 MW-6 12 01 -22 99 09/15/93 52 0 0 00 -39 99 MW-6 12 01 -22 99 09/29/91 52 12 0 0 00 -40 11 MW-6 12 01 -22 99 09/29/93 52 1 0 0 01 -40 10 <50 <0 3 <0 3 <0 3 <0 9 Mw-6 12 01 -22 99 11/05/93 CAR 0 0 00 12 01 MW-6 12 01 -22 99 12/22/93 51 04 0 0 00 -39 03 <SO <0 5 <0 S <0 5 c0 5 MW-6 12 01 -22 99 02/10/9- CAR 0 0 00