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TABLE 1 <br />HISTORICAL GROUNDWATER DATA - MONITORING WELLS <br />RANCH MARKET <br />23569 S. SANTA FE ROAD, RIVERBANK, CA <br />Page 5 of 10 <br />Well ID Date <br />Depth to <br />Water <br />Water <br />Elevation TPH-G Benzene Toluene <br />Ethyl <br />benzene <br />Total <br />Xylenes MTBE <br />TOC (feet) (feet MSL)(µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) <br />MW-5 12/09/98 <br />105.99 12/25/99 <br />04/06/00 <br />08/16/00 28.36 77.63 330 80 0.95 1.0 6.2 41 <br />09/01/00 <br />11/16/00 27.59 78.40 1,100 10 2.1 2.0 3.9 13 <br />01/03/01 27.70 78.29 600 2.9 1.3 1.8 3.8 14 <br />04/11/01 27.15 78.84 590 34 1.1 6.6 2.9 12 <br />07/03/01 28.49 77.50 210 27 <0.5 0.6 0.5 39 <br />10/01/01 28.85 77.14 150 12 <0.5 0.6 0.8 14 <br />01/03/02 27.63 78.36 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />04/05/02 27.81 78.18 160 6.9 <0.5 0.5 <0.5 20 <br />07/12/02 29.01 76.98 110 2.7 <0.5 0.8 <0.5 7.5 <br />10/01/02 29.49 76.50 250 71 3.4 0.7 7.4 25 <br />105.96 01/10/03 28.25 77.71 <50 <0.5 <0.5 <0.5 <0.5 8 <br />04/01/03 28.34 77.62 <50 <0.5 <0.5 <0.5 0.60 4.8 <br />07/02/03 28.47 77.49 97 <0.5 <0.5 <0.5 <0.5 27 <br />10/02/03 29.70 76.26 <50 <0.5 <0.5 <0.5 <0.5 2.4 <br />01/09/04 28.90 77.06 160 <0.5 <0.5 <0.5 <0.5 26 <br />04/08/04 28.63 77.33 64 0.7 <0.5 <0.5 <1.0 21 <br />07/01/04 29.15 76.81 66 0.7 <0.5 <0.5 0.90 20 <br />10/13/04 30.02 75.94 180 48 <0.5 <0.5 0.83 15 <br />01/05/05 29.65 76.31 80 <0.5 <0.5 <0.5 <0.5 15 <br />04/06/05 28.84 77.12 <50 <0.5 <0.5 <0.5 <1.5 0.72 <br />07/13/05 29.68 76.28 86 <0.5 <0.5 <0.5 <1.5 7.2 <br />10/12/05 29.72 76.24 87 <0.5 <0.5 <0.5 <1.5 9.3 <br />01/11/06 26.18 79.78 63 5.9 <0.5 <0.5 <1.5 5.8 <br />03/15/06 <br />06/08/06 25.59 80.37 330 55 <0.5 <0.5 2.0 26 <br />08/23/06 28.18 77.78 130 0.7 <0.5 <0.5 <1.0 76 <br />12/14/06 28.44 77.52 220 <0.5 <0.5 <0.5 <1.0 87 <br />03/26/07 28.13 77.83 130 <0.5 <0.5 <0.5 <1.0 63 <br />06/19/07 29.41 76.55 79 6.8 <0.5 <0.5 <1.0 13 <br />02/11/08 29.06 76.90 <50 <0.5 <0.5 <0.5 <1.0 3.1 <br />09/19/08 31.51 74.45 <50 <0.5 <0.5 <0.5 <1.0 7.8 <br />05/10/13 <br />12/04/14 <br />05/14/15 33.42 72.54 <50 <0.50 <0.50 <0.50 <1.0 19 <br />01/12/16 33.54 72.42 33J <0.50 <0.50 <0.50 <1.0 0.28 <br />11/02/16 33.82 72.14 1,200 230 36 <0.50 400 <0.50 <br />03/09/17 32.30 73.66 <50 <0.50 <0.50 <0.50 <1.0 <0.50 <br />09/29/17 32.85 73.11 690 72 5.4 17 160 <0.50 <br />01/31/18 31.53 74.43 700 58 1.6 32 22 <0.50 <br />08/12/18 33.91 72.05 500 42 3.2 24 84 0.13J <br />12/30/19 32.10 73.86 170 37 0.25J 11 5.7 <0.50