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TABLE 1 HISTORICAL ANALYTICAL RESULTS OF QUARTERLY GROUND WATER SAMPLES QUICK N SAVE #1 1901 South EI Dorado Street, Stockton, California Gµb/1) eninterval. -ft Date Sample ll) Depth to Water TPH-g Benzene Toluene Ethyl- Total MTBE TBA DIPE ETBE TAME 1 ,2-DCA EDB (screen in (ft btoc) benzene Xylenes bsg) 8015M EPA Method 8260B 03/30/04 29. 13 56,000 61300 490 500 15500 49100 <10 <1.0 <1 .0 <1 .0 <0.5 <0.5 06/28/04 29.7 21,000 49900 600 370 1,070 115000 <10 <1.0 <1 .0 19 13 <0.5 - 08/30/04 31 .29 329000 39200 480 840 39300 59600 <10 <1 .0 <1 .0 23 70 <0.5 11/17/04 31 .95 339000 59900 170 350 970 17200 <10 <1 .0 <1 .0 28 62 <0.5 02/14/05 30.39 15,000 49500 120 200 460 89500 <10 <1 .0 Q .0 42 85 <0.5 05/17/05 27.65 14,000 5000 66 230 403 49200 <10 <1 .0 <1 .0 47 49 <0.5 08/23/05 28.87 15,000 59700 86 200 410 5,700 <10 <1.0 <1 .0 17 13 <0.5 11/16/05 - 29,000 69600 40 150 240 139000 <10 <1.0 <1 .0 21 59 <0.5 02/06/06 29.33 36,000 18,000 22 78 152 4,300 <10 <1 .0 <1 .0 3 70 <0.5 MW-3 05/10/06 25.91 169000 11700 14 11 38 55 <10 <1 .0 <1 .0 Q .0 20 <0.5. (35-55 bsg) 08/07/06 25.78 109000 41100 35 83 169 4.7 <10 <1 .0 <1 .0 <1 .0 12 <0.5 11/07/06 26.64 349000 5,000 29 120 184 119000 <10 <1 .0 <1 .0 41 52 <0.5 02/07/07 26.43 195000 2,300 18 18 44 59400 <10 16 <1 .0 33 48 <0.5 05/07/07 25.85 175000 1,600 10 12 34 950 <10 <1 <1 3 34 <0.5. 08/07/07 26.43 29,000 4,200 28 47 100 3,800 <10 <1 <1 16 27 <0.5 �. 11/07/07 26.90 39,000 51300 22 24 57 67500 <10 <1 <1 38 190 <0.5 02/07/08 25.58 22,000 1,000 7 6 19 3,300 <10 <1 <1 12 36 <0.5 05/07/08 24.67 20,000 17200 12 11 30 11300 <10 <1 <1 7.2 36 <0.5 08/05/08 25.45 29,000 6,100 12 18 29 89000 <10 <1 <1 19 92 <0.5 10/30/08 1 26.35 30,000 1 49500 1 22 1 16 1 39.2 1 7400 1 <10 I <1 I < 1 11 1 52 1 <0.5 li Advanced GeoEnvironmental, Inc. !I