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September 2019 19121576 <br /> ' Table 4:Summary of Monitoring Results for MW-4 <br /> Date Interim Narrative 5/26/1999 7/21/1999 9/23/1999 11/10/1999 1/19/2000 .113/2000 5/16/2000 7/10/2000 9/27/2010 3/31/2011 6/28/2011 8/31/2011 11/172011 3/27/2012 .12712.12 9/13/2012 11/13/2012 3/19/2013 5/211-013 8/26/2013 11/15/2013 <br /> Standard <br /> ' Metals <br /> Arsenic,Dissolved(mg/L) 0.01 NA <0.005 U NA 0.0894 0.08 0.075 0.103 0.08 0.068 0.04 0.055 0.076 <0.02 U <0.02 U 0.0009 B <0.01 U <0.01 U <0.01 U <0.01 U <0.01 U <0.01 U <br /> Barium,Dissolved(mg/L) 2 0.14 0,29 0.461 0.55 0,69 0,81 0,92 0.972 8.69 8.84 7.83' 8.93 7.94 8.73 8.41 8.91 6.67 9.22 8.74 9.13 8.8 <br /> Boron,Dissolved(ni 0,75 0.49 0.54 0.53 0.59 0,56 0.6 0.6 0.55 0.7 0.5 B 0.62" 0.7 0.7 0.7 0.8 B 0.5 0.72 0.7 0.7 06 0.7 <br /> Chromium,Dissolved(mg/L) 0.1 <0.3 U <0.3 U <0.25 U <0.3 U <0.3 U NA <0.3 U <0.05 U <0.02 U <0,02 U <0.02 U <0.02 U <0.02 U <0.02 U 0.0014 B <0.02 U <0.02 U <0.02 U <0.02 U <0.02 U <0.02 U <br /> 1 Copper,Dissolved(mg/L) 0.2 <0.3U <0.3U 0.11B <0.3U <0.3U NA <0.3U <0.05U <0.5U <0.5U <0.5U <0.5U <0.5U <0.5U <tU <0.5U <0.5U <0.5U <0.5U <0.5U <0.5U <br /> Iron,Dissolved(mg/L) 0.3 <0.3 U <0.3 U 1.13 0.07 B 0.05 B 0.17 B 0,44 0.04 B 0.3 B 0.3 B 0.28" 0.8 <0.5 U 0.6 1.0 <0.5 U 0.32 U 0.8 0.5 U 0.4 B 0.3 B <br /> Lead,Dissolved(mg/L) 0.05 <0.01 U <0.005 U <0,005 U <0,005 U <0.005 U NA 0.009 <0.01 U <0,005 U <0.005 U 0.002 B 0.001 B <0605 U <0.005 U <0.01 U <0.005 U <0,005 U <0,005 U <0.005 U <0.005 U <0.005 U <br /> Lithium,Dissolved(mg/L) <br /> 2.5 0.9 1.2 1.3 1.4 1.5 1.6 1.5 1.51 2 1.9 2.25' 1.8 1.6 1.8 1.9 B 1.9 2.38 NA NA NA NA <br /> Manganese,Dissolved(m/1-) 0.05 0,21 0.89 0.977 0.94 0,87 0.81 0.75 0.703 <0.3 U <0.3 U <0.3 U <0.3 U <0.3 U <0.3 U <0.5 U <0.3 U 0.018 B <0.3 U <0.3 U <0.3 U <0.3 U <br /> Selenium,Dissolved(mg/L) 0.02 <0.5 U <0.005 U <0.005 U <0,005 U <0.005 U <0.005 U <0.005 U <0.005 U <0.003 U 0.012 <0.003 U <0.003 U <0.003 U 0.007 0.0029 <0.003 U 0.002 B 0.003 B 0.006 <0.003 U <0.003 U <br /> ' Thallium,Dissolved(mg/L) 0.002 <5 U <0.01 U <5 U <0.0003 U <0.005 U <0.001 U <0.003 U <0.005 U <0.005 U 0.001 B <0.005 U <0.005 U <0.005 U <0.005 U <0.01 U <0.005 U <0.005 U <0.005 U <0.005 U <0.005 U <0.005 U <br /> Uranium,Dissolved(mg/L) 0.03 NA NA NA 0.0235 0.019 0.0168 0.0138 0.015 <0.005 U 0.001 B <0.005 U 0.002 B <0.005 U <0.005 U <0,01 U <0.005 U <0.005 U NA NA NA NA <br /> Zinc,Dissolved(ni 2 1.07 1_03 1.71 <0.3 U <3 U <0.3 U <0.3 U 0.01 E <0.5 U <0.5 U <0.5 U <0.5 U <0.5 U <0.5 U <1.0 U <0.5 U <0.5 U <0.5 U 1 0.5 U <0.5 <br /> Other <br /> Chloride(mg/L) 250 2,770 2,940 4,260 4,800 4,970 5,200 6,900 5,300 6,300 6,200 6,200 6,600 6,282 6,063 6,105 6,566 6,077 6,744 6,490 6,470 6,750 <br /> Fluoride(mg/L) 2 1 1.1 0.9 0.9 IA 1.1 1.4 1.1 1.1 1.1 1 1.1 1.1 1.0 1.1 1.2 1.1 1.1 1.1 1.1 1.1 <br /> Nitrate as N(nr /L) 10 <0.1 U 0.07 <0A U <0.1 U 0.13 NA <0.1 U 0.73 <0.1 U <0.1 U <0.1 U <0.1 U <0.1 U 1.83 0.04 B 0.04 B 0.04 B NA NA NA NA <br /> Nitrite as N(mg/L) 1 <0.05 U <0.05 U <0.05 U <0.05 U <0.05 U NA <0.05 U <0,05 U <0.05 U 0.01 B <0,05 U <0.05 U <0.05 U <0.05 U <0.05 U <0.05 U <0.05 U NA NA NA NA <br /> Nitrate-Nitrite as N(m/L) 10 <0.1 U 0.07 B <0.1 U <0.1 U 0.13 NA <0A U 0,73 <0.1 U 0.02 B <0.1 U <0.1 U <0.1 U 1.83 0.04 B 0.04 B 0.04 B NA NA NA NA <br /> Lab pH(s.u) 6.5-8.5 8.1 7.7 7.8 7.8 8.1 7.6 8 8 8.3 H 8.2 H 8.2 8.2 H 8.3 U 8.1 H 8.1 H 8.1 H 8.2 H 8A H 8.2 H 8.1 H 8.1 H <br /> Total Dissolved Solids,filterable residue(ni 10,212' 5,870.0 7,610.0 8,170.0 8,660.0 8,670.0 9.110.0 8,98040 9,350.0 11,000 11,100 11,100 10,900 11,100 11,200 10,800 11,100 10,800 11,100 11,000 10,900 10,300 H <br /> Sulfate(mg/L) 250 970 1 600 460 390 3150 290 270 250 <500 U <500 U <500 U <3"U <500 U <500 U <500 U <500 U -500 U <500 U <500 U <500 U <500 U <br /> Gross Alpha(pCi/L) 15 26 12 53 -4.3 57 4.7 0 65 -10(t39) 73(t47) 16(t37) 40(t52) 19(t52) -33(t18) 260(t76) -0.11(t17) -15(t30) NA NA NA NA <br /> Gross Beta(pCi/L) 23 37 27 -24 18 20 4.7 8.6 -7.5(t53) 80(t49) 22(245) 51(t57) 66(t63) 38(t51) 270(x61) 53(t53) ti (t42) NA NA NA NA <br /> Field Paramters Not Avalible re-2010 <br /> Field pH s.0 6.5-8.5 NA NA NA NA NA NA NA NA 7.95 1 7.85 7.68 7.97 7.92 8.23 1 7,48 7.84 8.05 7,53 7.36 7,73 6.57 <br /> Field Conductivity(VS/cm) none NA NA NA NA NA NA NA NA 1,1125 1,959 17,420 18,450 18,230 18,500 9 17,080 18,790 11,720 18,800 18,750 19,055 <br /> Temperature(Degrees Celsius) none NA NA NA NA NA NA NA NA 17.7 15 19.9 23.4 14 14.6 18,6 22.0 12.3 12.1 1 16.7 18.8 11.46 <br /> ' Su Ma Ana s(Not Historical) aria zed <br /> Aluminum,Dissolved(mg/L) 5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA <br /> Antimony,Dissolved(mglL) 0.006 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA <br /> Be Ilium,Dissolved(m/L 0.004 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA <br /> Bicarbonate as CaCO3(mg/L) none NA NA NA NA NA NA NA NA 585 565 569 562 573 597 580 576 571 573 567 590 576 <br /> Carbonate as CaCO3(mg/L) none NA NA NA NA NA NA NA NA 168 <20 U <20 U <20 U <20 U <20 U <20 U <20 U <20 U <20 U <20 U <20 U <20 U <br /> ' Cadmium,Dissolved(mgIL) 0.005 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA <br /> Calcium,Dissolved(mg/L) none NA NA NA NA NA NA NA NA 37 38 79 37 35 36 42 38 39.2 37 37 37 36 <br /> Cobalt,Dissolved m IL 0,05 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA <br /> C anitle,Free m/L 0.2 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA <br /> Magnesium,Dissolved(ni none NA NA NA NA NA NA NA NA 18 18 38 1613,930 <br /> 17 22 19 18.9 18 18 17 16 <br /> Mercu Dissolved mg/L 0.002 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA <br /> Molybdenum,Dissolved(m/L) 0,21 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA <br /> ' Nickel,Dissolved(ni 0.1 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA <br /> Potassium,Dissolved m/L none NA NA NA NA NA NA NA NA 10 B 12 B 20 B 7.0 BB 7.0 B 15 B 10 B 22 10 B 10 B 9.0 B 9 B <br /> Silver,Dissolved(m/L) 0.05 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA <br /> Sodium,Dissolved(mg/L) none NA NA NA NA NA NA NA NA 4,270 4,180 4,280 4,200 4,220 4,240 4,250 4,150 4,390 4,260 4,350 4070 <br /> Vanadium,Dissolved m/L 0.1 NANA NA NA NA NA NA NA NANANA NA NA NA NA NA NA NA NA NA <br /> Notes: <br /> ' B=Estimated value,less than the practical quantitation limit forthat analyte,but greaterthan the method detection limit <br /> U=Analyte not detected,reported less than the practical quantitation limit <br /> H=Analysis exceeded method hold time,pH is a field test with an immediate hold time. <br /> NA=An a Me not analyzed <br /> =Second and third quarter 2015 reports presented calculated total dissolved solids results <br /> 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) <br /> ' "TDS standard is 1.25'Background,where background is the average of the 1999-2000 sampling <br /> Values in bold indicate a value greater than the BSGW <br /> "The regulatory standard for Gross Beta is provided in units of exposure,millirems per year(mmms/yr),which would require the measurement of specific nuclides(Tritium and Strontium)with known energy levels. Specific nuclides were not part of the approved constituent list. <br /> GOLDER <br /> 7 <br />