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� �■� 1_ w�w� www �■� ww■ � � � ■i■■ � � � � TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE,STOCKTON,CALIFORNIA Casing Depth Groundwater LPH Concentration(µg/L) Well Elevation to Water Elevation Thickness Ethyl- _ Number Date (feet) feet feet feet Benzene Toluene benzene Xylenes TPH-g MTBE MW3 09/10/02 851 <0 5* MW3 12/18/02 851 1997 -1146 000 28 21 16 4 7 323 h <0 5 MW3 03/24/03 851 1940 -1089 000 -- -- -- -- -- -- MW3 03/25/03 851 -- -- -- 500 18 4 0 5 6 755 h <0 5 MW3 06/11/03 851 1956 -1105 000 182 61 14 8 123 1,510 h 344 MW3 06/11/03 851 <0 5* MW3 09/17/03 851 2094 -1243 000 920 6 2 12 4 16 7 1,510 h 268 MW3 09/17/03 851 <0 5* MW3 12/08/03 851 2094 -1243 000 570 61 9 0 11 1 1,270 h 163 MW3 12/08/03 851 <0 5* MW3 03/02/04 851 1945 -1094 000 6 80 4 4 10 4 9 7 940 h 224 MW3 03/02/04 851 <0 5* MW3 06/28/04 851 2061 -12 10 000 -- -- -- -- -- -- MW3 06/29/04 851 -- -- -- 830 4 2 10 0 9 7 I,280 h 125 MW3 06/29/04 851 <0 5* MW3 09/27/04 851 2146 -1295 000 -- -- -- -- -- -- MW3 09/28/04 851 -- -- -- 890 113 6 7 15 6 1,000 h 9 4 MW3 09/28/04 851 <0 5* MW3 12/01/04 851 2112 -1261 0 00 -- -- -- -- -- -- MW3 12/02/04 851 -- -- -- 560 4 6 101 9 2 1,090 h 12 3 MW3 12/02/04 851 <0 5* MW3 03/24/05 851 1926 -1075 000 770 3 6 8 1 6 4 1,250 h 6 3 MW3 03/24/05 851 <0 5* MW3 06/22/05 851 1924 -1073 000 -- -- -- -- -- -- MW3 06/23/05 8 51 -- -- -- 750 2 5 6 4 4 7 685 h 7 9 MW3 06/23/05 851 <1* MW3 10/12/05 851 2063 42.12 000 11 55 10 13 1,300 h 17/<0 5* MW4 07/16/87 8 13 18 15 -10 02 000 1,100 <50 850 1,750 4,900 -- MW4 04/11/88 8 13 2123 -13 10 000 510 <25 490 1,100 8,500 -- MW4 09/13/88 8 13 2366 -15 53 000 860 40 670 2,400 5,600 -- MW4 11/16/88 8 13 23 81 -1568 000 860 340 810 1,000 8,000 -- MW4 02/09/89 8 13 2355 -1542 000 630 20 530 650 4,800 -- MW4 05/31/89 8 13 2501 -1688 000 790 35 720 1,300 6,000 -- MW4 08/17/89 8 13 2650 -1837 000 1,000 45 940 1,100 8,100 -- S 1projects1739421masierlwp1g100513942gw xls Page 9 of 58