March 2016 1547675
<br /> Table 3: Summary of Monitoring Results for MW-3
<br /> Date Benchmark Benchmark Basis 9/27/2010 3/31/2011 6/30/2011 8/31/2011 11/17/2011 3/27/2012 6/27/2012 9/13/2012 11/13/2012 3/19/2013 5/28/2013 8/26/2013 11/14/2013 2/18/2014
<br /> Level
<br /> Metals
<br /> Arsenic,Dissolved(mg/L) 0.062 Statistical Limit 0.019 0.01 0.011 0.02 <0.004 U <0.01 U 0.0011 B <0.005 U 0.0005 B 0.0008 B <0.005 U 0.001 B <0.002 U 0.0009 B
<br /> Barium,Dissolved(mg/L) 2.0 Regulatory Limit 2.4 2.95 2.23 2.73 2.25 2.51 2.08 2.52 2.23 2.5 2.20 2.41 2.25 2.31
<br /> Boron, Dissolved(mg/L) 0.75 Statistical Limit 0.77 0.75 0.74 0.8 0.78 0.77 0.76 0.76 0.85 0.79 0.84 0.75 0.76 0.74
<br /> Chromium,Dissolved(mg/L) 0.1 Regulatory Limit 0.003 B 0.001 B <0.01 U 0.004 B <0.004 U <0.01 U <0.002 U <0.01 U <0.01 U <0.004 U <0.01 U <0.01 U <0.004 U <0.004 U
<br /> Copper,Dissolved(mg/L) 0.2 Statistical Limit <0.1 U <0.1 U <0.3 U <0.1 U <0.1 U <0.05 U <0.05 U <0.3 U <0.3 U <0.05 U <0.3 U <0.3 U <0.05 U <0.05 U
<br /> Iron, Dissolved(mg/L) 0.3 Regulatory Limit 0.04 B 0.27 <0.3 U <0.1 U 0.1 0.22 0.32 <0.3 U 0.1 0.11 <0.3 U <0.3 U 0.14 0.19
<br /> Lead, Dissolved(mg/L) 0.05 Regulatory Limit <0.001 U 0.0007 B 0.0002 *B 0.0004 B <0.001 U <0.003 U 0.0007 <0.003 U 0.0003 B <0.001 U <0.003 U <0.003 U <0.001 U <0.001 U
<br /> Lithium, Dissolved(mg/L) 2.5 Statistical Limit 0.8 0.74 0.8 0.71 0.64 0.72 0.7 0.7 0.83 NA NA NA NA NA
<br /> Manganese, Dissolved(mg/L) 0.08 Statistical Limit 0.04 B 0.05 0.03 B 0.04 B 0.03 B 0.021 B 0.034 <0.1 U 0.047 0.026 <0.1 <0.1 U 0.031 0.043
<br /> Selenium, Dissolved(mg/L) 0.02 Statistical Limit 0.0006 0.0012 <0.001 U 0.0005 <0.005 U 0.0065 0.0007 <0.001 U 0.0005 B 0.0006 0.0043 <0.001 U 0.0003 B <0.0005 U
<br /> Thallium, Dissolved(mg/L) 0.01 Statistical Limit <0.001 U <0.001 U <0.003 U <0.001 U <0.001 U <0.003 U <0.0005 U <0.003 U <0.003 U <0.001 U <0.003 U <0.003 U <0.001 U <0.001 U
<br /> Uranium, Dissolved(mg/L) 0.03 Statistical Limit 0.0015 0.0008 B 0.001 B 0.0006 B 0.0012 0.0006 B 0.0011 0.0005 B 0.0005 B NA NA NA NA NA
<br /> Zinc,Dissolved(mg/L) 2.0 Statistical Limit <0.1 U <0.1 U <0.3 U <0.1 U <0.1 U <0.05 U <0.05 U <0.3 U <0.3 U <0.05 U <0.3 U <0.3 U <0.05 U 0.02 B
<br /> Other
<br /> Chloride (mg/L) 1,620 Statistical Limit 1,550 1,530 1,550 1,620 1,530 1,565 1,505 1,681 1,721 1,665 1,620 1,570 1,610 1,570
<br /> ' Fluoride(mg/L) 3.6 Statistical Limit 2.4 2.3 2.2 2.4 2.4 2.3 2.5 2.3 2.4 2.3 2.4 2.4 2.3 2.4
<br /> Nitrate as N(mg/L) 10 Statistical Limit <0.1 U 0.37 0.79 0.03 B <0.1 U <0.1 U _ 0.02 B 0.17 0.09 B NA NA NA NA NA
<br /> Nitrite as N(mg/L) 1.0 Statistical Limit <0.05 U <0.05 U <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 NA
<br /> Nitrate+Nitrite as N(mg/L) 10 Statistical Limit <0.1 U 0.37 0.79 0.03 B <0.1 U <0.1 U 0.02 B 0.17 0.09 B NA NA NA NA NA
<br /> Lab pH(s.u) 7.6-9.3 Statistical Limit 8.6 H 8.4 H 8.6 H 8.5 H 8.2 H 8.4 H 8.4 H 8.5 H 8.5 H 8.5 H 8.4 H 8.5 H 8.4 H 8.4 H
<br /> Total Dissolved Solids,filterable residue(mg/L) 4,546 Regulatory Limit 3,930 3,940 4,000 3,940 3,860 4,000 3,790 4,000 3,950 3,990 4,000 4,000 3,880 H 3,890
<br /> Sulfate(mg/L) 250 Regulatory Limit < 100 U <100 U <300 U <50 U <125 U <125 U 30.1 B <125 U <125 U <125 U <125 U <125 U < 125 U <125 U
<br /> I Gross Alpha(pCi/L) 15 Regulatory Limit 5.7(±13) 33(±20) 5.7(±17) 15(±18) 20(±18) 8(±13) 66(±27) 0.85(±14) -8.2(±8.6) NA NA NA NA NA
<br /> Gross Beta(pCi/L) none 3.2(±17) 25(±21) 7.2(±18) 5(±19) 5.4(±18) 13(±18) 110(±24) 15(±17) -4.9(±18) NA NA NA NA NA
<br /> Supplementary Analytes(Not Historically analyzed)
<br /> Bicarbonate as CaCO3(mg/L) none 1,110 1,130 1,100 1,090 1,100 1,160 1,130 1,130 1,130 1,140 1,130 1,130 1,170 1,220
<br /> Carbonate as CaCO3(mg/L) none 98 31 96 75 78 50 52 51 78 71 60 75 40 37
<br /> I Calcium,Dissolved(mg/L) none 6.6 11.9 7 7.5 6.8 6.3 9.4 7 7.5 6.1 7 8 6.8 6.7
<br /> Magnesium, Dissolved(mg/L) none 3 3.4 3 B 2.7 2.8 2.9 2.9 4 B 3.6 3.0 3 3 B 2.8 3
<br /> Potassium,Dissolved(mg/L) none 4.4 5.5 5.0 B 3.2 3.6 4.2 4.1 4.0 B 6.9 4.4 4.0 4.0 B 3.9 4.0
<br /> Sodium,Dissolved(mg/L) none 1,600 1,450 1,560 1,490 1,370 1,550 1,530 1,580 1,550 1,620 1,590 1,600 1,600 1,570
<br /> Notes:
<br /> B=Estimated value,less than the practical quantitation limit for that analyte,but greater than 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=Analyte not analyzed
<br /> A=Second and third quarter 2015 reports presented calculated total dissolved solids results
<br /> Values in Bold exceeded benchmark levels
<br /> Determination of benchmark levels presented in Golder 2011, Results of the September 2010 Groundwater Monitoring Event
<br /> near the Cement Kiln Dust Disposal Area A2 at the Boettcher Limestone Quarry, La Porte Colorado (January 6)
<br /> 001
<br /> Golder
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