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TABLE 1 GROUNDWATER MONITORING AND CHEMICAL RESULTS: FORMER REGAL STATION 603, 6425 PACIFIC AVENEUE, STOCKTON, CALIFORNIA WELL # CASING TOP OF DATE DEPTH TO PROD. VACUUM CORRECTED TOTAL PET. BENZENE TOLUENE ETHYL XYLENES Methyl te>rt-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 8020 8260 IN FEET IN FEET IN FEET PPB PPB PPB PPB PPB PPB PPB PPM MW-9 10.32 -24.68 04/32/89 48.12 0 -37.80 MW-9 10.32 -24.68 os/04/09 0 2000 39 12 1 0.9 MW-9 10.32 -24.68 05/22/89 0 MW-9 10.32 -24.68 08/24/89 51.54 0 -41.22 100 2.7 <0.5 <0.5 <0.5 MW-9 10.32 -24.68 10/10/89 51.42 0 -41.10 MW-9 10.32 -24.68 11/02/89 52.55 0 -42.23 MW-9 10.32 -24.68 11/30/89 52.31 0 -41.99 MW-9 10.32 -24.68 01/15/90 51.32 0 -41.00 <50O 280 78 1 37 MW-9 10.32 -24.68 02/19/90 51.09 0 -40.77 MW-9 10.32 -24.68 02/26/90 51.13 0 -40.81 MW-9 10.32 -24.68 05/25/90 51.31 0 -40.99 600 114 10 <0.3 26 MW-9 10.32 -24.68 11/27/90 52.66 0 -42.34 500 340 29 <0.3 B4 MW-9 10.32 -24.68 03/29/91 52.74 O -42.42 70 26 26 <0.3 17 MW-9 10.32 -24.68 06/27/91 53.08 0 -42.76 200 150 45 <3 27 MW-9 10.32 -24.68 09/18/91 53.15 0 -42.83 770 280 <1.5 <1.5 190 MW-9 10.32 -24.66 12/17/91 52.45 0 -42.13 1800 120 24 <1.5 24 MW-9 10.32 -24.68 01/21/92 52.08 0 -41.76 MW-9 10.32 -24.68 02/04/92 51.98 0 -41.66 R MW-9 10.32 -24.68 03/10/92 51.38 0 -41.06 470 4.3 <0.3 <0.3 <0.9 1 I MW-9 10.32 -24.68 04/29/92 51.79 0 -41.47 MW-9 10.32 -24.68 06/18/92 53.5 0 -43.18 56 3.3 <0.3 <0.3 <0.9 MW-9 10.32 -24.68 07/16/92 52.84 0 0.00 -42.52 MW-9 10.32 -24.68 06/14/92 53.26 0 -42.94 MW-9 10.32 -24.68 09/22/92 53.78 0 -43.46 <50 <0.3 <0.3 <0.3 <0.9 MW-9 10.32 -24.68 10/08/92 53.87 0 0.02 -43.57 MW-9 10.32 -24.68 11/11/92 53.48 0 0.01 -43.17 MW-9 10.32 -24.68 12/09/92 53.04 0 0.01 -42.73 MW-9 10.32 -24.68 01/15/93 52.74 0 0.00 -42.42 MW-9 10.32 -24.68 02/06/93 52.84 0 TRACE -42.52 MW-9 10.32 -24.68 03/11/93 51.38 0 0.01 -41.07 <50 <0.3 <0.3 70.3 <0.9 MW-9 10.32 -24.68 04/15/93 50.6 0 0.01 -40.29 MW-9 10.32 -24.68 05/18/93 $0.06 D 0.00 -39.74 MW-9 10.32 -24.68 06/14/93 49.7 0 0.002 -39.38 <50 <0.3 <0.3 <0.3 <0.9 MW-9 10.32 -24.68 07/19/93 49.96 D O.00 -39.64 MW-9 10.32 -24.68 08/20/93 49.9 0 0.03 -39.61 MW-9 10.32 -24.68 08/23/93 49.98 0 0.002 -39.66 MW-9 10.32 -24.68 09/15/93 50.22 0 0.000 -39.90 MW-9 10.32 -24.68 09/29/93 50.16 0 0.000 -39.84 MW-9 10.32 -24.68 09/29/93 50.14 0 0.008 -39.83 <50 <0.3 <0.3 <0.3 <0.9 MW-9 10.32 -24.68 11/05/93 49.8 0 0.000 -39.48 MW-9 10.32 -24.68 12/22/93 49.2 0 0.000 -38.88 <50 <0.5 <0.5 <0.5 <0.5