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0 TABLE 1 GROUNDWATER MONITORING AND CHEMICAL RESULTS: FORMER REGAL STATION 603, 5425 PACIFIC AVENEUE, STOCKTON, CALIFORNIA i WELL 9 CASING TOP OF DATE DEPTH TO PROD. VACUUM CORRECTED TO'T'AL 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 GAS-RANGE 8020 8260 IN FEET IN FEET IN FEET PPB PPS PPB PPB PPB PPB PPS PPM MW-2 12.61 -21.39 09/29/93 52.56 0 1.55 -41.50 120000 920 1900 120 2200 MW-2 12.61 -21.39 11/05/93 53.2 0 0.00 -40.59 MW-2 12.61 -21.39 12/22/93 52.93 0 0.00 -40.32 15000 710 3100 150 2400 MW-2 12.61 -21.39 02/10/94 50.66 0 1.98 -40.03 MW-2 12.61 -21.39 03/04/94 50.26 0 2.12 -39.77 MW-2 12.61 -21.39 03/29/94 42.1 0 3.61 -33.10 5800 110 550 260 2000 MW-2 12.61 -21.39 04/26/94 49.16 0 3.19 -39.76 MW-2 12.61 -21.39 05/19/94 49.41 0 3.19 -39.99 MW-2 12.61 -21.39 06/22/94 48.71 0 1.08 -37.18 31000 1600 8200 600 9200 MW-2 12.61 -21.39 08/17/94 52.16 0 2.44 -41.99 MW-2 12.61 -21.39 09/14/94 49.67 0 0.00 -37.06 25000 740 7100 230 6000 MW-2 12.61 -21.39 10/26/94 49.96 0 0.00 -37.35 MW-2 12.61 -21.39 12/16/94 49.62 0 0.00 -37.01 26000 1400 5800 240 6300 MW-2 12.61 -21.39 01/25/95 49.01 0 0.00 -36.40 MW-2 12.61 -21.39 03/15/95 48.55 0 0.00 -35.94 8300 370 1300 2217 2700 MW-2 12.61 -21.39 04/12/95 47.68 0 0.00 -35.07 MW-2 12.61 -21.39 05/17/95 45.28 0 6.00 -38.67 MW-2 12.61 -21.39 06/21/95 45.55 0 0.00 -32.94 16000 480 1800 850 4000 MW-2 12.61 -21.39 08/01/95 46.77 0 0.00 -34.16 MW-2 12.61 -21.39 09/26/95 42.17 0 2.81 -32.37 35000 1500 7500 880 9600 MW-2 12.61 -21.39 10/17/95 44.75 0 2.44 -34.56 MW-2 12.61 -21.39 11/14/95 43.85 0 3.84 -35.08 MW-2 12.61 -21.39 12/12/95 44.67 0 0.00 -32.06 3900 220 41 140 970 MW-2 12.61 -21.39 01/22/96 41.1 0 4.03 -32.52 MW-2 12.61 -21.39 03/06/96 42.55 0 0.00 -29.94 1600 190 19 100 75 MW-2 12.61 -21.39 04/09/96 39.3 0 2.81 -29.50 MW-2 12.61 -21.39 05/20/96 37.5 0 4.03 -28.92 MW-2 12.61 -21.39 06/20/96 37.9 0 4.78 -30.07 11000 490 1900 400 2700 <500 2.7 MW-2 12.61 -21.39 07/30/96 39,48 0 3.75 -30.62 MW-2 12.61 -21.39 09/19/96 39.86 0 2.81 -30.06 11000 220 1800 480 3400 <50 MW-2 12.61 -21.39 12/10/96 38.62 0 1.87 -27.88 34000 1000 8700 1500 13000 <300 MW-2 12.61 -21.39 03/18/97 36.3 0 1.87 -25.56 16000 390 3400 660 4500 <300 MW-2 12.61 -21.39 06/11/97 34.62 0 3.00 -25.01 9200 1 70 1700 160 2400 <300 MW-2 12.61 -21.39 09/29/97 37.42 0 0.37 -25.18 7000 120 1400 330 2400 <30 MW-2 12/98/97 sparging and vapor extraction system operating 9.1 MW-2 12.61 -21.39 12/16/97 37.2 0 0.00 -24.59 �F, 000, A , .`D0 3:(1+ S,F�JO <500 0 MW-2 12.61 -21.39 03/11/98 34.66 0 1.03 -23.08 18000 210 5200 610 5800 <100 MW-2 12.61 -21.39 05/28/98 32.68 0 0.00 -20.07 17000 140 4400 600 6100 <300 oes�obtaynedo # If.47 xwervseiconC�nuia �alrith 'afrbafiers2ile3pumpwhYcli�ehbwedT �TYl{ ,9 ?im9/IJ;'�+ ezen� liiyg� ..,