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0 0 • TABLE 1 GROUNDWATER MONITORING AND CHEMICAL RESULTS FORMER REGAL STATION 603, 6425 PACIFIC A'�RNEUE STOCKTON CALIFORNIA WELL # CASING TOP OF DATE DBPTH TO PROD VACUUM CORRECTED TOTAL PET BENZENE TOLUENE ETHYL XYLENES Methyl i-ert-Butyl DISSOLVED ELEVATION SLOT TOP OF THICK AT WELL GW ELEV HYDROCARB BENZENE Either 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-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-B 11 74 -23 26 04/26/94 49 66 0 0 010 -37 93 MW-8 11 74 -23 26 os/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-6 11 74 -23 26 08/17/94 50 44 0 0 010 -3B 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 0 000 -37 34 7300 2500 170 17 760 MW-8 11 74 -23 26 01/25/95 48 42 0 0 000 -36 66 MW-8 11 74 -23 26 03/15/95 47 52 0 0 000 -3S 78 700 750 990 420 1100 MW-8 1 11 74 -23 26 04/12/95 46 83 0 0 000 J -35 09 MW-8 11 74 -23 26 05/17/95 46 32 0 0 000 -34 S8 MW-8 11 74 -23 26 o6/21/95 46 02 0 0 000 -34 28 2400 590 63 85 310 MW-8 11 74 -23 26 oe/ol/9s 46 16 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 1 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- 11 74 -23 26 04/09/96 41 82 0 0 000 -30 08 MW-8 11 74 -23 26 01/2-2/96 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 07/30/96 41 3 0 0 000 -29 56 MW-8 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-8 11 74 -23 26 03/18/97 37 84 0 0 000 -26 10 2800 180 380 110 930 <20 MW-8 11 74 -23 26 06/11/97 37 74 0 0 000 -26 00 1700 76 250 76 590 <30* MW-8 11 74 -23 26 09/23/97 38 48 0 0 000 -26 74 1.400 14 55 77 480 14* PRESENT MW-8 12/08/97 leparging and vapor extraction system operating 1 3 MW-8 11 74 -23 26 12/16/97 37 7 0 0 000 -25 96 OQpM LV ZL,,C D, 6 B <5 0 MW-8 11 74 -23 26 03/11/9834 88 0 0 000 -23 14 3600 39 290 180 1300 34 MW-8 11 74 -23 26 05/28/98 33 09 0 0 000 -21 35 8200 32 260 430 3300 BO <30 MW-8 11 74 -23 26 o9/oe/9a 33 42 0 0 000 -21 68 3400 5 56 <0 5 150 [0 5 iNoCe�jWfflples obtained'onP!elj.2/9Twii'e'�cxa6is4'aontamznat6d3'with'l Fii1uleAsable""pim�p wkisch }ipwecYTR'p$g�d�J�L�nTlt3 aene`1 6 tTo3uene:Z2 ug/L; L�thyl Berizenei3 S�ug/L�:%ylenes.39 ug/L:hNME ND'<5 ugf ari the zeal'z�r]se samp e' `�1,s1 t{��'r gty i,a 1�,