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TABLE 1 HISTORICAL ANALYTICAL RESULTS OF QUARTERLY GROUND WATER SAMPLES QUICK N SAVE #1 1901 South El Dorado Street, Stockton, California �µ�l) Sample ID Depth to Water TPH-g Benzene Toluene Ethyl- Total MTBE TBA DIPE ETBE TAME 1,2-DCA EDB (screen interval -ft Date (ft btoc) benzene Xylenes bsg) I 8015M I EPA Method 8260B 03/30/04 28.64 829000 17100 1,200 11100 59200 119000 <10 <1.0 <1 .0 Q .0 4.6 <0.5 06/28/04 29.32 199000 490 1,400 240 19290 149000 <10 <1 .0 <1 .0 85 <0.5 <0.5 - 08/30/04 30.9 389000 500 1,400 210 1,160 12,000 <10 <1 .0 <1 .0 50 15 <0.5 11/17/04 31 .76 36,000 560 880 210 19510 18,000 <10 <1 .0 <1 .0 34 12 <0.5 02/14/05 30.09 23,000 500 19500 180 19200 20,000 <10 <1 .0 <1 .0 38 9.2 <0.5 05/17/05 27.43 21,000 750 1,300 320 1,520 12,000 <10 08/23/05 28.48 119000 600 96 270 11050 11,000 <10 <1 ,0 11/16/05 - 21,000 89 4,500 11 253 159000 <10 <1 .0 <1 .0 59 3.4 <0.5 02/06/06 29. 19 349000 160 11100 780 21910 69200 <10 <1 .0 <1 .0 6.8 5.9 <0.5 xp_2 05/10/06 25.92 21,000 160 95 260 15150 6 <10 <1 .0 <1 .0 2.9 5.8 <0.5 (35-55 bsg) 08/07/06 25.54 37100 49 3.9400 47 156 2 <10 <1 .0 <1 .0 1.6 1.7 <0.5 11/07/06 26.34 22,000 250 15100 920 59000 31100 <10 <1.0 <1 .0 16 9.8 <0.5 02/07/07 26.28 17,000 800 350 460 19370 31900 <10 16 <1 .0 28 <0.5 <0.5 05/07/07 25.71 16,000 160 350 600 19000 950 <10 <1 <1 3 4.8 <0.5 08/07/07 26. 16 459000 380 39400 700 4,800 900 <10 <1 <1 6.9 13 <0.5 11 /07/07 26.74 53,000 900 1,800 850 31600 2,000 <10 <1 <1 24 17.0 <0.5 02/07/08 25.61 429000 15100 S00 320 13320 3,500 <10 <1 <1 22 35.0 <0.5 05/07/08 24.52 409000 650 730 380 930 850 <10 <1 <1 8.3 21.0 <0.5 08/05/08 25.67 209000 57 220 80 326 140 <10 <1 <1 17 <0.5 <0.5 10/30/08 1 26.06 1 20,000 1 38 1 270 1 130 1 450 1 150 1 <10 I Advanced GeoEnvironmental, Inc.