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September 2016 1547675 Table 3: Summary of Monitoring Results for MW-3 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 Level Metals Arsenic,Dissolved m /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 ' 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 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 Chromium, Dissolved m /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 Copper,Dissolved m /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 Iron,Dissolved m /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 Lead,Dissolved m /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 Lithium, Dissolved m /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 Manganese,Dissolved m /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 ' Selenium, Dissolved m /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 Thallium, Dissolved m /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 Uranium,Dissolved m /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 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 Other Chloride m /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 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 Nitrate as N m /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 Nitrite as N m /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 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 Lab pH s.0 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 Total Dissolved Solids,filterable residue m /L 4,546 Regulatory Limit 3,930 3,940 4,000 3,940 3,860 4,000 3,790 1 4,000 3,950 3,990 4,000 4,000 3,880 H 3,890 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 Gross Alpha Ci/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 Gross Beta Ci/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 Supplementary Ana tes Not Historical) ana zed Bicarbonate as CaCO3 m /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 Carbonate as CaCO3 m /L none 98 31 96 75 78 50 52 51 78 71 60 75 40 37 Calcium,Dissolved m /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 Magnesium,Dissolved m /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 Potassium,Dissolved m /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 'Sodium,Dissolved m /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 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=Analyte not analyzed ^=Second and third quarter 2015 reports presented calculated total dissolved solids results Values in Bold exceeded benchmark levels Determination of benchmark levels presented in Golder 2011, Results of the September 2010 Groundwater Monitoring Event near the Cement Kiln Dust Disposal Area A2 at the Boettcher Limestone Quarry, La Porte Colorado (January 6) ti Golder I:\1511W4 1110110\3rdG2016 GW 5ampling-BoeHcher_Drt-16Sep16\Tables\Tables 1-1 AN... Page 1 of 2 9Associates