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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 Cert-Butyl DISSOLVED ELEVATION SLOT TOP OF THICK. AT WELL GW ELEV. HYDROCARB BENZENE Ether OXYGEN FEET AMSL FEET AMSL WATER HEAD FT. AMSL CTAS-RANGE 8020 8260 IN FEET IN FEET IN FEET PPB PPB PPB PPB PPB PPB PPB PPM MW-1 12.45 -22.55 12/07/ae 49.3 0 -36.65 20000 400 400 200 300 MW-1 12.45 -22.55 04/12/09 49.08 0 -36.63 MW-1 12.45 -22.55 05/04/89 0 90000 3000 6300 1300 5400 MW-1 12.45 -22.55 05/22/89 49.08 0.02 -36.61 MW-1 12.45 -22.55 08/24/89 53.81 1.26 -40.35 MW-1 12.45 -22.55 to/io/a9 53.78 0.125 -41.23 MW-1 12.45 -22.55 10/28/89 0100 MW-1 12.45 -22.55 11/02/69 54.12 0.04 -41.64 MW-1 12.45 -22.55 11/30/a9 53.2 0 -40.75 MW-1 12.45 -22.55 01/12/90 52.08 0 -39.63 55000 890 6200 720 11,000 MW-1 12.45 -22.55 02/19/90 51.92 0 -39.47 MW-1 12.45 -22.55 02/26/90 51.92 0 -39.47 MW-1 12.45 -22.55 05/25/90 52.01 0 -39.56 35000 2600 5600 290 4800 MW-1 12.45 -22.55 11/27/90 53.66 0.08 -41.15 no sample taken, product is clear yellow MW-1 12.45 -22.55 03/29/91 53.66 0 -41.21 sheen of floating product. MW-1 12.45 -22.55 06/27/91 54.24 0 -41:79 sheen of floating product. MW-1 12.4S -22.55 09/18/91 56.21 0.02 -43.74 floating product. MW-1 12.45 -22.55 12/17/91 54.06 0.005 -41.61 floating product. p MW-1 12.45 -22.55 01/21/92 54.1 0 0.38 -42.03 floating product-sheen MW-1 12.45 -22.55 02/04/92 54.09 0.125 0 -41.54 floating product-sheen MW-1 12.45 -22.55 03/10/92 53.68 0.01 0.46 -41.68 0.01 FEET OF FLOATING PRODUCT - CLEAR YELLOW. MW-1 12.45 -22.55 04/29/92 53.6 0 0.00 -41.15 WATER IS CLEAR NO PRODUCT MW-1 12.45 -22.55 06/18/92 54.8 0 0.00 -42.35 SHEEN OF FLOATING PRODUCT - CLEAR YELLOW. MW-1 12.45 -22.55 07/16/92 55 0 0.35 -42.90 SHEEN OF FLOATING PRODUCT - CLEAR YELLOW. MW-1 12.45 -22.55 08/14/92 55.55 0 0.00 -43.10 SHEEN OF FLOATING PRODUCT - CLEAR YELLOW. MW-1 12.45 -22.55 09/22/92 55.66 0 NM 830000 590 3500 750 26000 MW-1 12.45 -22.55 09/25/92 55.85 0 1.25 -44.65 MW-1 12.45 -22.55 10/08/92 55.86 0 1.34 -44.75 MW-1 12.45 -22.55 11/11/92 55.62 0 1.67 -44.84 MW-1 12.45 -22.55 12/09/92 55.34 0 3.47 -46.36 730 <0.3 <0.3 <0.3 17 MW-1 12.45 -22.55 01/15/93 55.72 0 0.00 -43.27 MW-1 12.45 -22.55 02/08/93 54.72 0 2.00 -44.27 MW-1 12.45 -22.55 03/11/93 53.5 0 2.62 -43.67 1900 3 3 <3 450 MW-1 12.45 -22.55 03/11/93 53.5 0 2.62 -43.67 2200 <3 <3 <3 470 MW-1 12.45 -22.55 04/15/93 52.7 0 3.84 -44.09 MW-1 12.45 -22.55 05/18/93 49.62 0 2.91 -40.08 MW-1 12.45 -22.55 06/14/913 51.4 0 4.12 -43.07 1200 4.8 8.5 <3.0 130 MW-1 12.45 -22.55 n7/19/93 51.8 0 4.22 -43.57 MW-1 12.45 -22.55 08/20/93 51.98 0 4.22 -43.75