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March 2016 1547675
<br /> Table 3: Summary of Monitoring Results for MW-3
<br /> Date Benchmark Benchmark 5/21/2014 8/27/2014 11/11/2014 2/18/2015 5/27/2015 8/27/2015 11/9/2015 2/15/2016
<br /> Level Basis
<br /> Metals
<br /> Arsenic, Dissolved(mg/L) 0.062 Statistical Limit 0.0005 B NA NA NA NA NA NA NA
<br /> Barium,Dissolved(mg/L) 2.0 Regulatory Limit 2.02 2.23 2.62 2.25 2.83 2.47 2.81 2.58
<br /> 1 Boron, Dissolved(mg/L) 0.75 Statistical Limit 0.76 0.76 0.78 0.81 0.74 0.79 0.74 0.76
<br /> Chromium,Dissolved(mg/L) 0.1 Regulatory Limit <0.004 U NA NA NA NA NA NA NA
<br /> Copper,Dissolved(mg/L) 0.2 Statistical Limit <0.05 U NA NA NA NA NA NA NA
<br /> Iron,Dissolved(mg/L) 0.3 Regulatory Limit 0.30 0.29 0.29 0.79 0.19 0.26 0.21 0.2 B
<br /> Lead,Dissolved(mg/L) 0.05 Regulatory Limit 0.0002 B NA NA NA NA NA NA NA
<br /> Lithium, Dissolved(mg/L) 2.5 Statistical Limit NA NA NA NA NA NA NA NA
<br /> Manganese, Dissolved(mg/L) 0.08 Statistical Limit 0.05 0.05 0.061 0.054 0.02 B 0.03 B 0.03 B <0.1 U
<br /> Selenium, Dissolved(mg/L) 0.02 Statistical Limit 0.0002 B NA NA NA NA NA NA NA
<br /> Thallium, Dissolved(mg/L) 0.01 Statistical Limit <0.001 U NA NA NA NA NA NA NA
<br /> Uranium, Dissolved(mg/L) 0.03 Statistical Limit NA NA NA NA NA NA NA NA
<br /> Zinc,Dissolved(mg/L) 2.0 Statistical Limit <0.05 U NA NA NA NA NA NA NA
<br /> Other
<br /> Chloride (mg/L) 1,620 Statistical Limit 1,580 1,520 1,540 1,530 1,620 1,570 1,560 1,640
<br /> Fluoride(mg/L) 3.6 Statistical Limit 2.4 NA NA NA NA NA NA NA
<br /> Nitrate as N(mg/L) 10 Statistical Limit NA NA NA NA NA NA NA NA
<br /> Nitrite as N(mg/L) 1.0 Statistical Limit NA NA NA NA NA NA NA NA
<br /> Nitrate+Nitrite as N(mg/L) 10 Statistical Limit NA NA NA NA NA NA NA NA
<br /> Lab pH(s.u) 7.6-9.3 Statistical Limit 8.3 H 8.3 H 8.4 H 8.2 H 8.3 H 8.4 H 8.3 H 8.4
<br /> Total Dissolved Solids,filterable residue(mg/L 4,546 Regulatory Limit 3,910 H 3,920 3,890 3,920 3,930 A 3,910 A 3,970 3,970
<br /> Sulfate(mg/L) 250 Regulatory Limit <125 U < 125 U <125 U <125 U <125 U <125 U <125 U <50 U
<br /> I Gross Alpha(pCi/L) 15 Regulatory Limit NA NA NA NA NA NA NA NA
<br /> Gross Beta(pCi/L) none NA NA NA NA NA NA NA NA
<br /> Supplementary Analytes(Not Historically analyzed)
<br /> Bicarbonate as CaCO3(mg/L) none 982 1,270 1,260 NA 1,200 1,170 1,230 1,210
<br /> Carbonate as CaCO3(mg/L) none 57 <20 U 41.6 NA 56.5 98.5 30.6 37.4
<br /> Calcium,Dissolved(mg/L) none 7.2 6.7 7.7 8.7 7 7.6 6.9 6.7
<br /> Magnesium,Dissolved(mg/L) none 3.1 3.4 3.2 3.3 2.8 3.1 2.9 2.8
<br /> Potassium, Dissolved(mg/L) none 3.8 4.0 4.1 4.0 5.3 4.0 4.0 4.1
<br /> Sodium,Dissolved(mg/L) none 1,610 1,500 1,490 1,430 1,480 1,450 1,480 1,540
<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)
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