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July 2018 Table 4: Summary of Monitoring Results for MW -4 1899205 Date Interim Narrative Standard 2/18/2014 5/21/2014 8/27/2014 11/11/2014 2/18/2015 5/27/2015 8/27/2015 11/9/2015 2/15/2016 5/31/2016 8/16/2016 11/9/2016 5/31/2017 11/15/2017 6/6/2018 Metals Arsenic, Dissolved (mg/L none < 0.01 U < 0.01 U NA NA NA NA NA NA NA NA NA NA NA NA NA Barium, Dissolved (mg/L none 8.58 9.64 801 8.56 8.77 8.76 8.81 8.80 8.66 8.79 8.91 8.61 8.95 8.60 9 Boron, Dissolved (mg/L none 0.63 0.6 07 0.7 0.8 B 0.6 0.7 0.6 0.7 0.6 0.6 0.61 0.7 0.6 0.8 Chromium, Dissolved (mg/L none < 0.02 U < 0.02 U NA NA NA NA NA NA NA NA NA NA NA NA NA Copper, Dissolved (mg/L none < 0.3 U < 0.5 U NA NA NA NA NA NA NA NA NA NA NA NA NA Iron, Dissolved (mg/L none 0.8 0.2 B 0.5 0.3 B < 1 U 0.3 B 0.1 B 0 4 B 0.2 B 0.14 < 0.5 U 0.15 < 0.5 U < 0.5 U < 0.5 U Lead, Dissolved (mg/L none < 0.005 U < 0.005 U NA NA NA NA NA NA NA NA NA NA NA NA NA Lithium, Dissolved (mg/L none NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA Manganese, Dissolved (mg/L none <0.1 U < 0.3 U <0.3 U < 0.3 U < 0.5 U < 0.3 U < 0.1 U < 0.3 U < 0.3 U < 0.03 U < 0.3 U < 0.03 U < 0.3 U < 0.3 U < 0.3 U Selenium, Dissolved (mg/L none < 0.003 U < 0.003 U NA NA NA NA NA NA NA NA NA NA NA NA NA Thallium, Dissolved (mg/L none < 0.005 U < 0.005 U NA NA NA NA NA NA NA NA NA NA NA NA NA Uranium, Dissolved (mg/L none NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA Zinc, Dissolved (mg/L none < 0.3 U < 0 5 U NA NA NA NA NA NA NA NA NA NA NA NA NA Other Chloride (mg/L none 7,080 6,450 5,600 6,260 6,650 6,410 6,630 6,880 6,530 6,290 6,350 5,960 6,390 6,170 H 6,150 Fluoride (mg/L none 1.1 1.13 NA NA NA NA NA NA NA NA NA NA NA NA NA Nitrate as N (mg/L none NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA Nitrite as N (mg/L none NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA Nitrate+Nitrite as N (mg/L none NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA Lab pH (s.u) none 8H 7.9H 81H 8.2H 8H 8.1H 8.2H 8.2H 8.2 7.9H 8 3 H 8.2H 8 3 H 7.9H 8.1H Total Dissolved Solids, filterable residue (mg/L none 10,800 H 10,300 H 9,530 10,900 10,600 10,600 ^ 9,720 ^ 10,800 10,900 10,100 10,800 11,100 10,500 11,000 10,900 Sulfate m /L) none < 500 U < 500 U < 500 U < 500 U < 500 U < 500 U < 500 U < 500 U < 500 U < 250 U < 250 U < 250 U < 250 U < 200 UH < 200 U Gross Alpha Ci/L none NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA Gross Beta (pCi/L none NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA Supplementary Analytes Not Historical) ana ed Bicarbonate as CaCO3 (mg/L none 606 623 616 611 NA 604 599 615 606 664 613 619 612 592 602 Carbonate as CaCO3 (mg/L none < 20 U < 20 U <20 U < 20 U NA < 20 U < 20 U <20 U <20 U <20 U 6.2 B < 20 U < 20 U <20 U <20 U Calcium, Dissolved (mg/L none 36.1 38 37 37 38 38 36.9 38 38 36 37 35.8 36 36 36 Magnesium, Dissolved (mg/L none 16 17 18 18 21 17 18 17 17 16.4 18 16.1 16 16 17 Potassium, Dissolved (mg/L none 9 9 B 9 B 10.0 12.0 B 9.0 90 10.0 11.0 9.1 9 9 10.0 9.0 8.0 B Sodium, Dissolved (mg/L none 4,120 4,360 4,050 3,950 4,070 4,040 4,030 4,050 4,290 4,020 4,000 4,160 4,080 3,950 4,030 Notes - B = Estimated value, less than the practical quantitation limit for that analyte, but greater than the method detection limit U = Analyte not detected, reported less than the practical quantitation limit H = Analysis exceeded method hold time. pH is a field test with an immediate hold time. NA = Analyte not analyzed ^ = Second and third quarter 2015 reports presented calculated total dissolved solids results Per Section 41.5 (C) (6) the of Regulation 41, the "Interim Narrative Standard" does not apply the waters with TDS grater than 10,000 mg/L C \UwmOSkime^Gddr Asr eudm\1898206, Fidm Boeddw Awry 2018 CO - Rpab\BwHdw_SrroRnWb_i stHa 2o18_DR-23JuI/B�Tades� 2