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OB-21 <br /> Summary-Data Table <br /> Groundwater Nitrate as <br /> Elevation Temp. Field pH Field EC Field Turbidity Lab pH Lab EC Lab TDS TKN Nitrogen <br /> Date (FT.,MSL) (Degrees C) (pH Units) (umhos/cm) (NTUs) (pH Units) (umhos/cm) (mg/L) (mg/L) (mg/L) <br /> April 7,2014 39.94 17.3 7.00 1,146 9.26 7.44 1,110 760 18 <br /> July 7,2014 40.15 18.2 6.40 1,141 5.39 7.48 1,290 860 6.2 <br /> October 6,2014 39.32 17.8 7.14 1,160 9.54 7.29 1,260 680 0.18 4.5 <br /> January 6,2015 39.95 16.6 7.16 1,187 4.73 7.41 1,220 800 6.4 <br /> April 27,2015 40.27 18.0 7.19 1,181 8.54 7.50 1,220 780 7.2 <br /> July 13,2015 38.92 18.0 6.98 1,117 19.1 7.62 1,200 730 6.8 <br /> October 5,2015 38.98 18.3 7.12 1,103 1.82 7.39 1,150 760 0.15 2.2 <br /> January 11,2016 39.85 17.4 7.22 675 2.9 7.53 922 580 0.37 <br /> April 4,2016 40.05 18.1 7.20 633 3.7 7.47 870 590 0.085 <br /> July 25,2016 39.83 18.3 7.63 653 1.5 7.81 662 490 <0.10 <br /> October 10,2016 39.17 18.1 7.15 465 9.8 7.80 465 330 0.22 <0.10 <br /> January 18,2017 41.73 17.6 7.71 659 8.37 7.69 655 460 0.058 <br /> April 4,2017 44.47 18.2 7.41 579 16.1 7.56 574 410 <0.10 <br /> July 5,2017 47.27 18.1 7.51 404 22.9 7.80 358 160 <0.10 <br /> October 2,2017 41.35 18.0 6.70 430 15.1 7.74 403 290 0.16 <0.021 <br /> January 2,2018 45.94 17.3 7.51 364 4.3 7.62 344 260 <0.021 <br /> April 2,2018 41.42 17.0 7.86 303 14.2 7.90 355 260 <0.021 <br />