2019-03-05_REVISION - M1977348 (5)

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March 2019 18107649 ' Table 2: Summary of Monitorinq Results for MW-1 Date Interim Narrative 5/21/2014 8/27/2014 '11111I20'14 2/18/2015 6127/2015 8/2712015 11/9/2015 2/15/2016 5/31/2016 8/1612016 11/9/2016 5/3112017 11/15/2017 616/2018 11/15/2018 Standard Metals ' Arsenic,Dissolved m/L 0,01 0.001 B NA NA NA NA NA NA NA NA NA NA NA NA NA 0.001 B Barium,Dissolved m/L 2.0 0.004 B 0.006 B 0.007 B 0.009 B <0.08 U <0.08 U <0.08 U 0.03 B <0.08 U <0.08 U 0.007 B <0.08 U <0.08 U <0.08 U <0.08 U Boron,Dissolved m/L 0.75 0.57 0.56 0.58 0.59 0.55 0.57 0.52 0.6 0.51 0.51 0.56 0.61 0.61 0.65 0.62 Chromium,Dissolved m L 0.1 <0.01 U NA NA NA NA NA NA NA NA NA NA NA NA NA <0.01 U Co r,Dissolved m L 0.2 <0.05 U NA NA NA NA NA NA NA NA NA NA NA NA NA <0.01 U Iron Dissolved m/L 0.3 <0.05 U <0.05 U <0.05 U <0.05 U <0.3 U <0.3 U <0.3 U -0.3 U <0.3 U <0.3 U <0.05 U <0.3 U <0.3 U <0.3 U <0.3 U ' Lead,Dissolved m/L 0.05 <0.003 U NA NA NA NA NA NA NA NA NA NA NA NA NA <0.003 U Lithium,Dissolved(mg/L) 2.5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 1.13 Man anese,Dissolved m/L 0.05 0.033 0.045 0.041 0.052 <0.1 U 0.04 B <0.1 U 0.04 B <0.1 U <0.1 U 0.04 <0.1 U <0.1 U c0.1 U 0.022 Selenium,Dissolved m/L 0.02 0.2775 NA NA NA NA NA NA NA NA NA NA NA NA NA 0.0904 Thallium,Dissolved m L 0.002 <0.003 U NA NA NA NA NA NA NA NA I NA I NA I NA I NA I NA <0.003 U Uranium,Dissolved m/L 0.0300 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.036 Zinc,Dissolved m/L 2.0 <0.05 U NA NA NA NA NA NA NA NA I NA I NA NA NA NA <0.3 U DOW Chloride m/L 250 <250 U <250 U <250 U 68.9 B 154 B <250 U <250 U <250 U <250 U <250 U 47.5 B 32.2 B 413 BH 27.5 B <200 U Fluoride m/L 2.0 0.44 NA NA NA NA NA NA NA NA NA NA NA NA NA 0.62 Nitrate as N m/L 10.0 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 15 Nitrite as N m/L to NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.06 ' Nitrate+Nitrite as N m L 10.0 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 16.2 Lab ets.0 6.5-8.5 7.8 H 7.8 H 8 H 7.9 H 7.9 H 8 H 7.9 H 7.84 7.9 H 8.1 H 8.1 H 8.2 H 8 H 8.3 H 8.2 Total Dissolved Solids,filterable residue m/L 8595' 61910 H 6,950 7,900 7,380 8,210 ^ 7,760 A 8,020 7,660 8,450 8,040 7,460 7,010 7,070 7,240 6,910 Sulfate m/L 250 6 850 4 670 4 300 4 800 5 540 5 640 5,430 6,250 5,470 5,540 4,700 4,690 4,340 H 4,530 5,090 Gross Alpha Ci/L 15.0 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 40 331 Gross Beta Ci/L NA NA NA NA NA NA NA NA NA NA NA NA NA NA 33 ±29 ' Not Historically analyzed Aluminum,Dissolved m/L 5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA <0.8 U Antimon Dissolved m/L 0.006 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.004 B Be Ilium,Dissolved m L 0.004 NA NA NA NA NA NA NA NA NA NA NA NA NA NA <0.001 U Bicarbonate as Ca203 m/L none 333 310 325 NA 320 302 306 319 307 329 325 369 361 358 NA Carbonate as CT m/L none <20 U <20 U -20 U NA <20 U <20 U <20 U <20 U <20 U <20 U <20 U <20 U <20 U 3.1 B NA ' Cadmium,Dissolved m/L 0.005 NA NA NA NA NA NA NA NA NA NA NA NA NA NA <0.001 U Calcium Dissolved m L none 330 287 309 230 301 320 289 279 345 275 269 187 175 220 163 Cobalt,Dissolved m L 0.05 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.0018 Cyanide,Free m/L 0.2 NA NA NA NA NA NA NA NA NA NA NA NA NA NA <0.01 U Ma nesium Dissolved m/L none 364 297 303 247 300 342 301 290 376 301 283 202 188 225 175 Memu Dissolved m/L 0.002 NA NA NA NA NA NA NA NA NA NA NA NA NA NA <0.001 U Mol denum Dissoived m/L 0.21 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.085 ' Nickel,Dissolved m/L 0.1 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.009 B Potassium,Dissolved m/L none WEI 19.4 21.8 15.6 19 20 18 18.6 22 16 20.5 13 12 16 12 Silver,Dissolved m/L 0.05 NA NA NA NA NA NA NA NA NA NA NA NA NA NA <0.003 U Sodium Dissolved m/L none 1 910 1 570 1 510 1,770 1 670 1,740 1,770 1 720 1,570 1,710 1 640 1,710 1 660 1 650 1 760 Vanadium,Dissolved m L 0.1 NA NA NA NA NA NA NA NA NA NA NA NA NA NA <0.1 U 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=Analvte 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",is the minimum of Table 1-Table 4 of The Basic Standards for Groundwater(BSGW) 'TDS standard is 1.25'Background,where background is the average of the 1999-2000 sampling Values in bold indicate a value greater than the BSGW "The regulatory standard for Gross Beta is provided in units of exposure,millirems per year(mrems/yr),which would require the measurement of specific nuclides(Tritium and Strontium)with known energy levels. Speck nuclides were not part of the approved constituent list. ' 0 GOLDER 2