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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 6 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-5D 12/09/98 <br />105.85 12/25/99 <br />04/06/00 <br />08/16/00 49.52 56.33 <50 5.0 0.76 1.7 3.1 3.2 <br />09/01/00 <br />11/16/00 28.08 77.77 <50 1.0 <0.5 <0.5 0.87 1.5 <br />01/03/01 28.08 77.77 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />04/11/01 27.70 78.15 <50 <0.5 0.53 <0.5 0.57 <0.5 <br />07/03/01 29.78 76.07 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />10/01/01 29.65 76.20 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />01/03/02 27.54 78.31 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />04/05/02 28.51 77.34 <50 0.92 0.80 <0.5 0.67 12 <br />07/12/02 30.48 75.37 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />10/01/02 30.23 75.62 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />105.84 01/10/03 28.56 77.28 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />04/01/03 28.95 76.89 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />07/02/03 30.11 75.73 <br />10/02/03 30.42 75.42 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />01/09/04 30.11 75.73 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />04/08/04 29.48 76.36 <50 <0.5 <0.5 <0.5 <1.0 <0.5 <br />07/01/04 30.25 75.59 50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />10/13/04 30.67 75.17 50 <0.5 <0.5 <0.5 <1.0 <0.5 <br />01/05/05 29.30 76.54 50 <0.5 <0.5 <0.5 <1.0 <0.5 <br />04/06/05 29.50 76.34 50 <0.5 <0.5 <0.5 <1.5 <0.5 <br />07/13/05 31.21 74.63 <50 <0.5 <0.5 <0.5 <1.5 <0.5 <br />10/12/05 30.20 75.64 <50 <0.5 <0.5 <0.5 <1.5 66 <br />01/11/06 25.54 80.30 <50 <0.5 <0.5 <0.5 <1.5 <0.5 <br />03/15/06 26.07 79.77 <br />06/08/06 26.80 79.04 <50 <0.5 <0.5 <0.5 <1.0 0.55 <br />08/23/06 29.40 76.44 <50 <0.5 <0.5 <0.5 <1.0 <0.5 <br />12/14/06 28.79 77.05 <50 <0.5 <0.5 <0.5 <1.0 <0.5 <br />03/26/07 28.71 77.13 <50 <0.5 <0.5 <0.5 <1.0 1.6 <br />06/19/07 30.78 75.06 <50 <0.5 <0.5 <0.5 <1.0 <0.5 <br />02/11/08 29.57 76.27 <50 <0.5 <0.5 <0.5 <1.0 <0.5 <br />09/19/08 32.50 73.34 <50 0.64 0.54 0.63 2.7 <0.5 <br />05/10/13 <br />12/04/14 <br />05/14/15 <br />01/12/16 34.37 71.47 <50 <0.50 <0.50 <0.50 <1.0 <0.50 <br />11/02/16 34.53 71.31 <50 <0.50 <0.50 <0.50 <1.0 0.54 <br />03/09/17 32.61 73.23 <50 <0.50 <0.50 <0.50 <1.0 <0.50 <br />09/29/17 33.84 72.00 <50 <0.50 <0.50 <0.50 <1.0 <0.50 <br />01/31/18 32.20 73.64 <50 <0.50 <0.50 <0.50 <1.0 <0.50 <br />08/12/18 35.35 70.49 <br />12/30/19 32.85 72.99 <50 <0.50 <0.50 <0.50 <1.0 <0.50