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TABLE 1 GROUNDWATER MONITORING AND CHEMICAL RESULTS: FORMER REGAL STATION 603, 6425 PACIFIC AVENEUE, STOCKTON, CALIFORNIA WELL # CASING DATE DEPTH TO PROD. VACUUM CORRECTED TOTAL PET. BENZENE TOLUENE ETHYL XYLENES Methyl Cert-Butyl DISSOLVED ELEVATION TOP OF THICK. AT WELL GW ELEV. HYDROCARA BENZENE Ether OXYGEN FEET AMSL WATER HEAD FT. AMSL GAS-RANGE 8020 8260 IN FEET IN FEET IN FEET PPM PPB PPB PPB PPB PPB PPS PPM 1.2.45 08/23/9352.2 0 0.94 -40.69 12.45 09/15/93 52.34 0 0.00 -39.89 12.45 09/29/93 53.34 0 0.00 -40.89 12.45 09/29/93 52.34 0 2.53 -42.42 0.44 0.6 1 1.9 55 12.45 11/05/93 52.08 0 0.00 -39.63 12.45 12/22/93 52.44 0 0.00 -39.99 0.1 1 <0.5 1.1 1.3 31 12.45 02/10/94 50.4 0 2.06 -40.01 12.45 03/04/94 50.02 0 0.08 -37.65 8010 method = below detection limits for all compounds. 12.45 03/29/94 49.44 0 0.03 -37.02 0.1 <0.5 c0.5 <0.5 3 12.45 04/26/94 48.96 0 0.03 -36.54 12.45 05/19/94 49.33 0 0.03 -36.91 12.45 06/22/94 49.22 0 0.03 -36.80 0.1 <0.5 <0.5 <0.5 7 12.45 00/17/94 54.54 0 0.02 -42.11 12.45 09/14/94 49.31 0 0.00 -36.86 0.2 <0.5 <0.5 <0.5 <2 12.45 10/26/94 49.5 0 0.00 -37.05 12.45 12/16/94 49.06 0 0.00 -36.61 0.5 <0.5 <0.5 <0.5 8 12.45 01/25/95 NM 0 0.00 12.45 03/15/95 47.67 0 0.02 -35.24 1.3 <0.5 <0.5 <0.5 13 N..t 12.45 04/12/95 NM 0 0.00 12.45 06/17/95 46.36 0 0.00 -33.91 12.45 06/21/95 46.15 0 0.00 -33.70 0.2 <0.5 <0.5 <0.5 <2 12.45 08/01/95 49.19 0 0.00 -36.74 12.45 09/26/95 46 0 5.72 -39.27 0.1 <0.5 <0.5 <0.5 <2 12.45 10/17/95 NM 0 2.81 12.45 11/14/95 45.48 0 4.31 -37.34 12.45 12/12/95 44.9 0 3.05 -35.50 <0.05 <0.5 <0.5 <0.5 <2 12.45 01/22/96 44.17 0 5.01 -36.73 12.45 03/06/96 42.84 0 0.00 -30.39 0.09 0.8 <0.5 <0.5 3.8 12.45 04/09/96 41.5 0 3.56 -32.61 12.45 05/26/96 37 0 4.31 -28.86 12.45 06/20/96 37.08 1 0 4.12 -28.75 <0.05 <0.5 1 <0.5 <0.5 <2 <50 4.2 12.45 07/30/96 39.48 0 3.75 -30.78 12.45 09/19/96 41.92 0 1.97 -31.44 <0.05 <0.5 <0.5 <0.5 <2 <5 12.45 12/10/96 38.52 0 1 1.12 -27.19 0.08 <0.5 <0.5 <0.5 <2 <5 12.45 03/16/97 37.8 0 2.16 -27.51 <0.05 <0.5 <0.5 <0.5 <2 <5 12.45 06/11/97 37.44 0 1.73 -26.72 0.9 <0.5 1.5 2.8"14 <5 12.45 09/23/97 37.56 0 2.25 -27.36 0.05 <0.5 <0.5 <0. c5 12.45 12/16/97 37.93 0 0.00 -25.48 c5 0.2 1. �_ --