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' July 2017
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<br /> 1 Table 4: Summary of Monitoring Results for MW-4
<br /> Date Benchmark Benchmark Basis 9/27/2010 3/31/2011 6/28/2011 8/31/2011 11/172011 3/27/2012 6/27/2012 9/13/2012 11/13/2012 3/19/2013 5/28/2013 8/26/2013 11/15/2013
<br /> Level
<br /> Metals
<br /> Arsenic,Dissolved m /L 017 Statistical Limit 0 068 004 0 055 0 076 <0 02 U <0 02 U 00009 B <0 01 U <0 01 U <0 01 U <0 01 U <0 01 U <0 01 U
<br /> 1 Barium,Dissolved m /L 20 Regulatory Limit 8.69 8.84 7.83* 8.93 7.94 8.73 8.41 8.91 8.67 9.22 8.74 9.13 8.8
<br /> Boron,Dissolved m /L 075 Statistical Limit 07 05 6 062* 07 07 07 0.8 B 05 072 07 07 06 07
<br /> Chromium,Dissolved m /L 03 Statistical Limit <0 02 U <0 02 U <0 02 U <0 02 U <0 02 U <0 02 U 00014 B <0 02 U <0 02 U <0 02 U <0 02 U <0 02 U <0 02 U
<br /> Copper,Dissolved m /L 03 Statistical Limit <0 5 U <0 5 U <0 5 U <0 5 U <0 5 U <0 5 U <1 U <0 5 U <0 5 U <0 5 U <0 5 U <0 5 U <0 5 U
<br /> Iron,Dissolved m /L 061 Statistical Limit 03 B 03 B 028* 0.8 <0 5 U 06 1.0 <0 5 U 032 U 0.8 05 U 0.4 B 03 6
<br /> 1 Lead,Dissolved m /L 005 Reaulatory Limit <0 005 U <0 005 U 0 002 B 0 001 B <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 /> Lithium,Dissolved m /L 25 Statistical Limit 2 1 9 2 25* 1 8 1 6 1 8 1 9 B 1 9 238 NA NA NA NA
<br /> Manganese,Dissolved m /L 12 Statistical Limit <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 m /L 002 Statistical Limit <0 003 U 0 012 <0 003 U <0 003 U <0 003 U 0 007 00029 <0 003 U 0 002 B 0.003 B 0 006 <0 003 U <0 003 U
<br /> Thallium Dissolved m /L 001 Statistical Limit <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 m /L 003 Statistical Limit <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,Dissolvedm /L 20 Statistical Limit <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 <0 5 U <0 5 U <0 5 U
<br /> Other
<br /> Chloride m /L 8,895 Statistical Limit 6,300 6,200 6,200 6,500 6,282 6,063 6,105 6,566 6,077 6,744 6,490 6,470 6,750
<br /> Fluonde m /L 20 Statistical Limit 1 1 1 1 1 1 1 1 1 1 0 1 1 1.2 1 1 1 1 1 1 IA 1 1
<br /> 1 Nitrate as N m /L 10 Statistical Limit <0 1 U <0 1 U <0 1 U <0 1 U <0 1 U 1 83 004 B 004 B 004 B NA NA NA NA
<br /> Nitrite as N m /L 10 Statistical Limit <0 05 U 001 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+Nitnte as N m /L 10 Statistical Limit <0 1 U 002 B <0 1 U <0 1 U <0 1 U 1 83 004 B 004 B 004 B NA NA NA NA
<br /> Lab pHsu 6 5-8 5 Statistical Limit 83 H 82 H 82 82 H 83 U 81 H 81 H 81 H 82 H 81 H 82 H 81 H 81 H
<br /> 1 Total Dissolved Solids,filterable residue m /L 10,212 Regulatory Limit 11,000 11,100 11,100 10,900 11,100 11,200 1 10,800 11,100 10,800 11,100 1 11 000 10,900 10,300 H
<br /> Sulfate m /L 1,322 Statistical Limit <500 U <500 U <500 U <300 U <500 U <500 U <500 U <500 U <500 U <500 U <500 U <500 U <500 U
<br /> Gross Alpha Ci/L 15 R ulato Limit -10 t39 73 t47 16 t37 40 +52 19 t52 -33 t18 260 t76 -0 11 t17 -15 t30 NA NA NA NA
<br /> Gross Beta C✓L none -7.5 t53 80 t49 22 t45 51 t57 66 t63 38 t51 270 t61 53 t53 9 9 t42 NA NA NA NA
<br /> Supplementary Anal es Not Historical) anal zed
<br /> 1 Bicarbonate as CaCO3 m /L none 585 565 569 562 573 597 580 576 571 573 567 590 576
<br /> Carbonate as CaCO3 m /L none 16 B <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 /> Calcium Dissolved m /L none 37 38 79 37 35 36 42 38 392 37 37 37 36
<br /> Magnesium,Dissolved m /L none 18 18 38 16 16 17 22 19 189 18 18 17 16
<br /> Potassium,Dissolved m /L none 10 B 12 B 20 B 7.0 B 9 0 8 70 B 15 B 10 B 22 10 B 10 B 9 0 B 9 B
<br /> ! Sodium,Dissolved m /L none 4,270 4,180 4,280 4,200 3,930 4,220 4,240 4,250 4,150 4,390 4,260 4,350 4,070
<br /> Notes
<br /> B=Estimated value,less than the practical
<br /> quantitation limit for that analyte,but greater than
<br /> 1 the method detection limit
<br /> U=Analyte not detected,reported less than the
<br /> practical quantitation limit
<br /> H=Analysis exceeded method hold time pH is a
<br /> field test with an immediate hold time
<br /> 1 NA=Analyte not analyzed
<br /> A=Second and third quarter 2015 reports
<br /> presented calculated total dissolved solids results
<br /> *Reanalysis performed for analyte,reanalysis
<br /> result reported
<br /> 1 Values in Bold exceeded benchmark levels
<br /> Determination of benchmark levels presented in
<br /> Golder 2011,Results of the September 2010
<br /> Groundwater Monitoring Event near the Cement
<br /> Kiln Dust Disposal Area A2 at the Boettcher
<br /> Limestone Quarry,La Porte Colorado (January 6)
<br /> !
<br /> Ilk
<br /> i
<br /> 1
<br /> Golder
<br /> I\17\1772432\0110\GWSamp1G2017_Fnl-2BJu117\Tables 1-7 xlszMW-0 Page 1 of 2 N&WAssociates
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