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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 7 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-6 12/09/98 <br />105.52 12/25/99 <br />04/06/00 <br />08/09/00 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />08/16/00 26.56 78.96 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />11/16/00 26.05 79.47 690 2.6 1.4 1.2 2.9 0.97 <br />01/03/01 26.09 79.43 <50 <0.5 <0.5 <0.5 0.95 0.63 <br />04/11/01 25.79 79.73 400 <0.5 <0.5 <0.5 1.3 <0.5 <br />07/03/01 26.95 78.57 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />10/01/01 27.31 78.21 <50 2.3 <0.5 1.3 2.3 <0.5 <br />01/03/02 26.30 79.22 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />04/05/02 26.38 79.14 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />07/12/02 27.67 77.85 <50 <0.5 0.59 <0.5 0.58 <0.5 <br />10/01/02 28.05 77.47 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />105.52 01/10/03 26.83 78.69 <50 1.3 2.9 <0.5 3.2 <0.5 <br />04/01/03 27.02 78.50 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />07/02/03 27.48 78.04 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />10/02/03 28.46 77.06 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />01/09/04 27.55 77.97 57 <0.5 <0.5 <0.5 <0.5 <0.5 <br />04/08/04 27.19 78.33 <50 <0.5 <0.5 <0.5 <1.0 <0.5 <br />07/01/04 27.96 77.56 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />10/13/04 28.60 76.92 <50 <0.5 <0.5 <0.5 <1.0 <0.5 <br />01/05/05 27.97 77.55 <50 <0.5 <0.5 <0.5 <1.0 <0.5 <br />04/06/05 27.50 78.02 <50 <0.5 <0.5 <0.5 <1.0 <0.5 <br />07/13/05 28.35 77.17 <50 <0.5 <0.5 <0.5 <1.0 <0.5 <br />10/12/05 28.45 77.07 <50 <0.5 <0.5 <0.5 <1.0 <0.5 <br />01/11/06 26.14 79.38 <50 <0.5 <0.5 <0.5 <1.0 <0.5 <br />03/15/06 25.47 80.05 <br />06/08/06 24.48 81.04 <50 <0.5 <0.5 <0.5 <1.0 <0.5 <br />08/23/06 26.88 78.64 <50 <0.5 <0.5 <0.5 <1.0 <0.5 <br />12/14/06 27.13 78.39 <50 <0.5 <0.5 <0.5 <1.0 <0.5 <br />03/26/07 26.80 78.72 <50 <0.5 <0.5 <0.5 <1.0 <0.5 <br />06/19/07 28.08 77.44 <50 <0.5 <0.5 <0.5 <1.0 <0.5 <br />02/11/08 27.74 77.78 <50 <0.5 <0.5 <0.5 <1.0 <0.5 <br />09/19/08 30.17 75.35 <50 <0.5 <0.5 <0.5 <1.0 <0.5 <br />05/10/13 <br />12/04/14 <br />05/14/15 <br />01/12/16 32.97 72.55 <50 <0.50 <0.50 <0.50 <1.0 <0.50 <br />11/02/16 33.42 72.10 <br />03/09/17 31.65 73.87 <br />09/29/17 31.95 73.57 <br />01/31/18 30.75 74.77 <br />08/12/18 33.12 72.40 <br />12/30/19 31.60 73.92