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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 10 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-9 12/09/98 <br />109.14 12/25/99 <br />04/06/00 <br />08/08/00 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />08/16/00 31.98 77.16 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />11/16/00 31.37 77.77 200 2.5 0.93 0.67 1.5 0.76 <br />01/03/01 31.46 77.68 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />04/11/01 30.89 78.25 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />07/03/01 32.05 77.09 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />10/01/01 32.40 76.74 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />01/03/02 30.91 78.23 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />04/05/02 31.48 77.66 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />07/12/02 32.57 76.57 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />10/01/02 32.96 76.18 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />109.14 01/10/03 31.81 77.33 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />04/01/03 31.89 77.25 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />07/02/03 32.06 77.08 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />10/02/03 33.30 75.84 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />01/09/04 32.44 76.70 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />04/08/04 32.15 76.99 <50 <0.5 <0.5 <0.5 <1.0 <0.5 <br />07/01/04 32.54 76.60 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <br />10/13/04 33.53 75.61 <50 <0.5 <0.5 <0.5 <1.0 <0.5 <br />01/05/05 32.85 76.29 <50 <0.5 <0.5 <0.5 <1.0 <0.5 <br />04/06/05 32.40 76.74 <50 <0.5 <0.5 <0.5 <1.5 <0.5 <br />07/13/05 33.22 75.92 86 <0.5 <0.5 <0.5 <1.5 <0.5 <br />10/12/05 33.05 76.09 <50 <0.5 <0.5 <0.5 <1.5 <0.5 <br />01/11/06 28.71 80.43 <50 <0.5 <0.5 <0.5 <1.5 <0.5 <br />03/15/06 29.18 79.96 <br />06/08/06 29.20 79.94 <50 <0.5 <0.5 <0.5 <1.5 <0.5 <br />08/23/06 31.70 77.44 <50 <0.5 <0.5 <0.5 <1.5 <0.5 <br />12/14/06 31.98 77.16 <50 <0.5 <0.5 <0.5 <1.0 <0.5 <br />03/23/07 31.79 77.35 <50 <0.5 <0.5 <0.5 <1.0 <0.5 <br />06/19/07 33.03 76.11 <50 <0.5 <0.5 <0.5 <1.0 <0.5 <br />02/06/08 32.54 76.60 <50 <0.5 <0.5 <0.5 <1.0 <0.5 <br />09/19/08 34.96 74.18 <50 <0.5 0.54 0.52 1.2 <0.5 <br />05/10/13 <br />12/04/14 <br />05/14/15 <br />01/12/16 36.90 72.24 <50 <0.50 <0.50 <0.50 <1.0 <0.50 <br />11/02/16 36.75 72.39 <br />03/09/17 35.62 73.52 <br />09/29/17 36.00 73.14 <br />01/31/18 34.38 74.76 <br />08/12/18 Not Accessible <br />12/30/19 Not Accessible <br />Notes:TOC = Top of Casing Elevation relative to Mean Sea Level (MSL); TPH-G = Total Petroleum Hydrocarbons as Gasoline (purgeable <br />hydrocarbons); MTBE = Methyl-t-butyl-ether; µg/L = Micrograms per liter (parts per billion); < = Less than indicated Practical <br />Quantitation Limit (PQL) or Reporting Limit; J = Estimated value (less than PQL but greater than method detection limit [MDL]); <br />Data prior to November 2016 compiled by others.