ARCHIVED REPORTS_SECOND QUARTER 2018 GROUNDWATER MONITORING REPORT

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TABLE 2 2ND-QUARTER 2018 GROUNDWATER-MONITORING DATA DP/RIPON ENERGY (APRIL 2 AND 3,2018) Field Data Laboratory Data NO3 as RP DTW GWE Temp pH EC Turbidity pH EC TDS Nitrogen Well Date (ft, MSL) (ft) (ft, MSL) (C°) (pH Units) (umhos/cm) (NTU) (pH Units) (umhos/cm) (mg/L) (mg/L) OB-1 4/2/2018 66.91 26.39 40.52 19.2 7.75 1,422 18.7 7.68 1,710 940 11 OB-2 4/2/2018 70.93 29.45 41.48 19.4 7.78 769 7.59 7.63 905 570 5.7 OB-4 4/2/2018 69.39 27.59 41.80 18.5 7.72 2,028 16.7 7.75 2,370 1,500 1.6 OB-5 4/2/2018 63.71 23.17 40.54 19.1 7.31 880 8.45 7.37 1,030 700 5.7 OB-7 4/2/2018 69.55 27.84 41.71 19.9 7.84 902 0.45 7.70 1,060 700 1.2 OB-8 4/2/2018 59.67 17.92 41.75 17.7 7.85 652 0.90 7.48 776 500 1.6 OB-11 4/2/2018 68.38 26.74 41.64 20.1 7.23 1,110 0.31 6.93 1,250 900 <0.021 OB-17 4/2/2018 59.79 17.21 42.58 15.8 7.47 296 0.43 7.45 328 230 <0.021 OB-19 4/2/2018 66.80 25.49 41.31 18.9 7.86 944 41.9 7.75 1,110 700 6.8 OB-21 4/2/2018 57.56 16.14 41.42 17.0 7.86 303 14.2 7.90 355 260 <0.021 OB-22 4/2/2018 57.59 15.57 42.02 17.9 7.87 97 4.25 7.60 115 100 <0.021 OB-24 4/2/2018 58.73 18.20 40.53 18.1 7.72 1,645 20.6 7.37 1,970 1,400 2.2 OB-25 4/2/2018 59.18 18.32 40.86 18.5 7.50 2,147 635 7.20 2,440 1,500 2.9 OB-26 4/2/2018 67.19 25.79 41.40 20.2 7.92 824 7.33 7.63 996 710 41 OB-28 4/2/2018 71.52 29.63 41.89 19.4 7.54 1,449 2.31 7.29 1,720 1,000 56 ASB-2* 4/2/2018 NA NA NA 21.2 9.91 619 NA NA NA 433 NA Stanislaus** 4/2/2018 NA NA NA 13.6 8.12 57 NA NA NA 40 NA Note: NA = not applicable; TDS values for ASB-2 and the Stanislaus River were calculated from field EC values (Field EC * 0.7 = TDS). * = Sample collected from pond adjacent to OB-8. ** = Sample collected adjacent to OB-17.