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TABLE 1 HISTORICAL GROUNDWATER DATA-MONITORING WELLS RANCH MARKET 23569 S.SANTA FE ROAD, RIVERBANK,CA Page 10 of 10 Well ID Date Depth to Water TPH-G Benzene Toluene Ethyl Total MTBE Water Elevation benzene Xylenes TOC (feet) (feet MSL) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) MW-9 12/09/98 109.14 12/25/99 04/06/00 08/08/00 <50 <0.5 <0.5 <0.5 <0.5 <0.5 08/16/00 31.98 77.16 <50 <0.5 <0.5 <0.5 <0.5 <0.5 11/16/00 31.37 77.77 200 2.5 0.93 0.67 1.5 0.76 01/03/01 31.46 77.68 <50 <0.5 <0.5 <0.5 <0.5 <0.5 04/11/01 30.89 78.25 <50 <0.5 <0.5 <0.5 <0.5 <0.5 07/03/01 32.05 77.09 <50 <0.5 <0.5 <0.5 <0.5 <0.5 10/01/01 32.40 76.74 <50 <0.5 <0.5 <0.5 <0.5 <0.5 01/03/02 30.91 78.23 <50 <0.5 <0.5 <0.5 <0.5 <0.5 04/05/02 31.48 77.66 <50 <0.5 <0.5 <0.5 <0.5 <0.5 07/12/02 32.57 76.57 <50 <0.5 <0.5 <0.5 <0.5 <0.5 10/01/02 32.96 76.18 <50 <0.5 <0.5 <0.5 <0.5 <0.5 109.14 01/10/03 31.81 77.33 <50 <0.5 <0.5 <0.5 <0.5 <0.5 04/01/03 31.89 77.25 <50 <0.5 <0.5 <0.5 <0.5 <0.5 07/02/03 32.06 77.08 <50 <0.5 <0.5 <0.5 <0.5 <0.5 10/02/03 33.30 75.84 <50 <0.5 <0.5 <0.5 <0.5 <0.5 01/09/04 32.44 76.70 <50 <0.5 <0.5 <0.5 <0.5 <0.5 04/08/04 32.15 76.99 <50 <0.5 <0.5 <0.5 <1.0 <0.5 07/01/04 32.54 76.60 <50 <0.5 <0.5 <0.5 <0.5 <0.5 10/13/04 33.53 75.61 <50 <0.5 <0.5 <0.5 <1.0 <0.5 01/05/05 32.85 76.29 <50 <0.5 <0.5 <0.5 <1.0 <0.5 04/06/05 32.40 76.74 <50 <0.5 <0.5 <0.5 <1.5 <0.5 07/13/05 33.22 75.92 86 <0.5 <0.5 <0.5 <1.5 <0.5 10/12/05 33.05 76.09 <50 <0.5 <0.5 <0.5 <1.5 <0.5 01/11/06 28.71 80.43 <50 <0.5 <0.5 <0.5 <1.5 <0.5 03/15/06 29.18 79.96 06/08/06 29.20 79.94 <50 <0.5 <0.5 <0.5 <1.5 <0.5 08/23/06 31.70 77.44 <50 <0.5 <0.5 <0.5 <1.5 <0.5 12/14/06 31.98 77.16 <50 <0.5 <0.5 <0.5 <1.0 <0.5 03/23/07 31.79 77.35 <50 <0.5 <0.5 <0.5 <1.0 <0.5 06/19/07 33.03 76.11 <50 <0.5 <0.5 <0.5 <1.0 <0.5 02/06/08 32.54 76.60 <50 <0.5 <0.5 <0.5 <1.0 <0.5 09/19/08 34.96 74.18 <50 <0.5 0.54 0.52 1.2 <0.5 05/10/13 12/04/14 05/14/15 01/12/16 36.90 72.24 <50 <0.50 <0.50 <0.50 <1.0 <0.50 11/02/16 36.75 72.39 03/09/17 35.62 73.52 09/29/17 36.00 73.14 01/31/18 34.38 74.76 08/12/18 Not Accessible Notes: TOC=Top of Casing Elevation relative to Mean Sea Level(MSL);TPH-G=Total Petroleum Hydrocarbons as Gasoline (purgeable hydrocarbons);MTBE=Methyl-t-butyl-ether;pg/L=Micrograms per liter(parts per billion);<=Less than indicated Practical Quantitation Limit(PQL)or Reporting Limit;J=Estimated value(less than PQL but greater than method detection limit [MDL]);Data prior to November 2016 compiled by others.