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� ww: w ww � ■w ww w � w � w ww s � �■ TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE,STOCKTON,CALIFORNIA Casing Depth Groundwater LPH Concentration Well Elevation to Water Elevation Thickness Ethyl- Number Date feet feet feet feet Benzene Toluene benzene Xylenes TPH-g MTBE RWI 09/20/01 770 18 86 -11 15 001 -- -- -- -- -- RW 1 12/04/01 768 1864 -1096 000 -- -- -- -- -- -- RWI 03/05/02 768 1780 -1012 000 148 82 0 214 298 3,360 h 970 RWI 03/05/02 768 <0 5* RWI 06/11/02 7 68 1828 -1060 0 00 755 25 0 120 950 1,640 h 235 RWI 06/11/02 768 <05* RWI 09/10/02 768 1950 -1182 000 634 313 121 116 2,750 h 295 RWI 09/10/02 7 68 <0 5* RWI 12/18/02 768 1927 -1159 000 130 910 228 255 2,400 h 240 RWI 12/18/02 768 <5* RWI 03/24/03 768 1875 -1107 000 -- -- -- -- -- -- RWI 03/25/03 768 -- -- -- 105 698 163 229 3,690 h 208 RWI 03/25/03 7 68 <0 5* RWI 06/11/03 768 1897 -11 19 000 180 115 187 251 4,740 h 706 RWI 06/11/03 7 68 <0 5* RWI 09/17/03 768 2026 -1258 000 176 127 298 590 5,300 h 696 RWI 09/17/03 768 <0 5* RWI 12/08/03 7 68 2025 -1257 000 147 897 239 349 5,140 h 442 RWI 12/08/03 7 68 <0 5* RWI 03/02/04 768 18 79 -11 11 000 807 503 162 195 2,810 h 48 2 RWI 03/02/04 768 <0 5* RWI 06/28/04 768 2000 -1232 000 -- -- -- -- -- -- RWI 06/29/04 7 68 -- -- -- 102 857 264 335 3,520 h 367 RWI 06/29/04 768 <0 5* RWI 09/27/04 768 2083 -13 15 0 00 134 939 217 304 4,300 h 816 RWI 09/27/04 768 - <0 5* RWI 12/01/04 768 2048 -1280 000 -- -- -- -- -- -- RWI 12102/04 768 -- -- -- 110 978 272 345 4,060 h 436 RWI 12/02/04 7 68 <0 5* RW2 05/22/90 8 13 2940 -2127 000 2,000 6,100 1,800 10,000 51,000 -- RW2 09/25/90 8 13 3079 -2266 000 1,000 5,200 1,600 8,600 33,000 -- RW2 12/19/90 8 13 3062 -2249 000 940 3,500 860 5,200 16,000 -- RW2 01/30/91 8 13 3108 -2295 000 580 2,300 580 3,600 I3,000 -- glprojects1739421masterlwp\g1204L3942gw xls Page 34 of 56