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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 GAS-RANGE 8020 8260 IN FEET IN FEET IN FEET PPB PPB PPB PPB PPB PPS PPB PPM MW-8 11.74 -23.26 11/05/93 51.92 0 0.000 -40.18 MW-8 11.74 -23.26 12/22/93 51.35 0 0.000 -39.61 6300 840 86 110 1700 MW-8 11.74 -23.26 02/10/94 51.26 0 0.025 -39.55 MW-8 11.74 -23.26 03/04/94 50.74 0 0.025 -39.03 MW-8 11.74 -23.26 03/29/94 49.28 0 0.007 -37.55 MW-8 11.74 -23.26 04/26/94 49.66 0 0.010 -37.93 MW-8 11.74 -23.26 05/19/94 49.92 0 0.013 -38.19 MW-8 11.74 -23.26 06/22/94 48.17 0 0.000 -36.43 9800 1400 560 230 2100 MW-8 11.74 -23.26 08/17/94 50.44 0 0,010 -38.71 MW-8 11.74 -23.26 09/14/94 49.18 0 0.000 -37.44 5600 1400 140 140 770 MW-8 11.74 -23.26 10/26/94 49.43 0 0.000 -37.69 Mw-8 11.74 -23.26 12/16/94 49.08 0 O.O6O -37.34 7300 2500 170 17 760 Mw-8 11.74 -23.26 01/25/95 48.42 0 0.000 -36.56 MW-8 11.74 -23.26 03/15/99 47.52 0 0.000 »35.78 700 750 990 420 1100 MW-8 11.74 -23.26 04/12/95 46.83 0 0.000 -35.09 MW-8 11.74 -23.26 05/17/95 46.32 0 0.000 -34.58 MW-8 11.74 -23.26 n6/21/95 46.02 0 0.000 -34.28 2400 590 63 85 310 MW-8 11.74 -23.26 ne/n1/95 46.18 0 0.000 -34.44 MW-8 11.74 -23.26 09/26/95 46.1 0 0.000 -34.36 5400 900 370 160 1100 MW-8 11.74 -23.26 10/17/95 46.05 0 0.000 -34.31 MW-8 11.74 -23.26 11/14/95 45.8 0 0.000 -34.06 MW-8 11.74 -23.26 12/12/95 45.32 0 0.007 -33.59 4800 690 270 140 1100 MW-8 11.74 -23.26 01/22/96 44.4 0 0.000 -32.66 MW-8 11.74 -23.26 03/06/96 43.56 0 0.000 -31.82 2500 250 190 76 620 MW-8 11.74 -23.26 04/09/96 41.62 0 0.000 -30.08 MW-8 11.74 -23.26 01/22/96 40.05 0 0.002 -28.31 MW-8 11.74 -23.26 06/20/96 41.65 0 0.000 -29.91 2700 210 240 100 710 <50 1.2 MW-8 11.74 -23.26 67/30/96 41.3 0 0.000 -29.56 MW-B 11.74 -23.26 09/19/96 42 0 0.000 -30.26 2100 150 210 92 740 23 MW-8 11.74 -23.26 12/10/96 40.42 0 0.003 -28.68 1900 160 180 98 730 15 MW-6 11.74 -23.26 03/18/97 37.84 0 0.000 -26.10 2800 180 380 110 930 <30 Mw-8 11.74 -23.26 06/13/97 37.74 1 0 0.000 -26.001700 76 250 76 590 <30* MW-8 11.74 -23.26 09/23/97 38.48 0 0.000 -26.74 1400 14 55 77 480 14* PRESENT MW-a 12/08/97 sparging and vapor extraction system operating 1.3 MW-8 11.74 23.2fi 12/16/97 37.7 0 0.000 -25.96 #M4 gffp�M' U W5VIO B <5 0 MW-8 11.74 -23.26 03/11/98 34.88 0 0.000 -23.14 3600 39 290 1 180 1300 34 MW-8 11.74 -23.26 05/20/98 33.09 0 0.000 -21.35 8200 32 260 430 3300 80 <30 e;i ob'tairied vn /��'f,97 weze cro�s;� ----- --- --F"d ith za ereibl'e' �'" � � ,{�P �w11��H{show�dFTPHg� -t' �2;�1tIj%�,�8enzeri�i� u�/t� Setiz 5a� '?g it fi}�nalis�r »aesair:l33ek�'.ii ?1 ]��:, ;'p