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July 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 5/31/2016
<br />' Level Basis
<br /> Metals
<br /> Arsenic,Dissolved m /L 0.062 Statistical Limit 0.0005 B NA 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 3.16
<br /> Boron,Dissolved(mg/L) 0.75 Statistical Limit 0.76 0.76 0.78 0.81 0.74 0.79 0.74 0.76 0.74
<br /> Chromium,Dissolved m /L 0.1 Regulatory Limit <0.004 U NA NA NA NA NA NA NA NA
<br /> Copper, Dissolved m /L 0.2 Statistical Limit <0.05 U NA NA NA NA NA NA NA NA
<br />' Iron,Dissolved m /L 0.3 Regulatory Limit 0.30 0.29 0.29 0.79 0.19 0.26 0.21 0.2 B 0.2 B
<br /> Lead,Dissolved m /L 0.05 Regulatory Limit 0.0002 B NA NA NA NA NA NA NA NA
<br /> Lithium,Dissolved m /L 2.5 Statistical Limit NA NA NA NA NA NA NA NA NA
<br /> Manganese,Dissolved m /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 <0.1 U
<br /> Selenium,Dissolved m /L 0.02 Statistical Limit 0.0002 B NA NA NA NA NA NA NA NA
<br /> Thallium,Dissolved m /L 0.01 Statistical Limit <0.001 U NA NA NA NA NA NA NA NA
<br /> Uranium,Dissolved m /L 0.03 1 Statistical Limit NA 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 NA
<br /> ' Other
<br /> Chloride m /L 1,620 Statistical Limit 1,580 1,520 1,540 1,530 1 620 1,570 1,560 1,640 1,690
<br /> Fluoride(mg/L) 3.6 Statistical Limit 2.4 NA NA NA NA NA NA NA NA
<br /> Nitrate as N m /L 10 Statistical Limit NA NA NA NA NA NA NA NA NA
<br /> Nitrite as N m /L 1.0 Statistical Limit NA 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 NA
<br /> Lab pH s.0 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 8.3 H
<br /> Total Dissolved Solids,filterable residue m /L 4,546 Regulatory Limit 3,910 H 3,920 3,890 3,920 3,930 ^ 3,910 ^ 3,970 3,970 4,040
<br /> Sulfate(mg/L) 250 Regulatory Limit <125 U <125 U <125 U <125 U <125 U <125 U <125 U <50 U <50 U
<br /> ' Gross AI ha Ci/L 15 Regulatory Limit NA NA NA NA NA NA NA NA NA
<br /> Gross Beta Ci/L none NA NA NA NA NA NA NA NA NA
<br /> Supplementary Anal tes Not Historical) anal zed
<br /> Bicarbonate as CaCO3 m /L none 982 1,270 1,260 NA 1,200 1,170 1,230 1,210 1,300
<br /> ' Carbonate as CaCO3 m /L none 57 <20 U 41.6 NA 56.5 98.5 1 30.6 37.4 21.4
<br /> Calcium, Dissolved m /L none 7.2 6.7 7.7 8.7 7 7.6 6.9 6.7 7.4
<br /> Magnesium,Dissolved m /L none 3.1 3.4 3.2 3.3 2.8 3.1 2.9 2.8 3 B
<br /> Potassium,Dissolved m /L none 3.8 4.0 4.1 4.0 5.3 4.0 4.0 4.1 4.0
<br /> ' Sodium,Dissolved m /L none 1,610 11500 1 1,490 1,430 1,480 1,450 1,480 1,540 1,510
<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 /> ^=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 /> Golder
<br /> I.\15\1547fi75\0110\2ndG20tfi GWSampling-Boettcher_DR-01Ju116\Tables\new Tables 1-7 DataRequest_Tables 1-7.xIsxMW-3 Page 2 of 2 OlAssociates
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