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Table 1 - Average ionic composition and ion proportions <br />New Elk Coal Company, LLC <br />New Elk Mine <br />Constituent <br />Surface Water <br />PRS -1 PRS -4 <br />PAW -1 I <br />Alluvial Wells <br />PAW -2 PAW -8 <br />PAW -9 <br />Mine Water <br />NEW -2 NEW -4 <br />Average TDS (mg/L) <br />179 <br />J <br />193 <br />122410.2 <br />111- <br />580.2 <br />461.8 <br />709 <br />1398 <br />Average EC (pmhos/cm) <br />284 <br />281.9 <br />3906 <br />671 <br />844.7 <br />728.8 <br />1075 <br />1932 <br />Average CaZ+ Concentration (mg/L) <br />1. - <br />46 <br />11 <br />46.6 <br />71 - <br />21 32 <br />"1 11- <br />68.3 <br />1, - Iz � <br />100 <br />- I I i" -1 <br />74.6 <br />- I - .­. � <br />9.9 <br />. ,, <br />8 <br />Ca 2+ Proportion of Cations (%) <br />73.5% <br />724% <br />49.3% <br />44.5% <br />45.8% <br />43.3% <br />3.3% <br />13% <br />Average Mgt+ Concentration (mg/L) <br />8.3 <br />8.4 <br />763 <br />13.2 <br />20.5 <br />14.8 <br />3.1 <br />3.6 <br />MgZ+ Proportion of Cations (%) <br />133% <br />13.1% <br />17.7% <br />86% <br />9.4% <br />8.6% <br />10% <br />0.6% <br />Average Na+ Concentration (mg/L) <br />7.1 <br />8.1 <br />13.16 <br />69.31 <br />96.1 <br />80.2 <br />279 <br />619 <br />Average K+ Concentration (mg/L) <br />1.21 <br />1.24 <br />1.11 <br />2.78 <br />1.9 <br />26 <br />6.4 <br />6 <br />Na+ plus K+ Proportion of Cations (%) <br />13.3% <br />14.5% <br />33.0% <br />46.9% <br />44.9% <br />48.1% <br />95.6% <br />98.2% <br />Average CO3 -+HCO3 Concentration (mg/L) <br />14061 <br />13975 <br />108.56 <br />341 <br />423 <br />350.1 <br />543.5 <br />1417 <br />CO3 -+HCO3 Proportion of Anions (%) <br />79.6% <br />79.8% <br />83.3% <br />82.3% <br />789% <br />80.9% <br />90.7% <br />97.3% <br />Average Cl- Concentration (mg/L) <br />2.1 <br />2.31 <br />67 <br />5 <br />15 <br />24.3 <br />7 <br />8.08 <br />Cl- Proportion of Anions (%) <br />1.2% <br />1.3% <br />5.1% <br />1.2% <br />2.8% <br />5.6% <br />1.2% <br />0.6% <br />Average SO4 " Concentration (mg/L) <br />34 <br />33 <br />15 <br />68.3 <br />98.4 <br />58.1 <br />49 <br />30.8 <br />SO4z- Proportion of Anions (%) <br />19.2% <br />189% <br />11.5% 1 <br />16.5% <br />1 18.3% <br />13.4% <br />8.2% <br />2.1% <br />Notes: <br />mg/L = milligrams per liter <br />Nmhos/cm = micromho per centimeter <br />% = percent <br />TDS = Total dissolved solids <br />EC = Electrical conductivity <br />CaZ+ = Calcium ion <br />Mg 21 = Magnesium ion <br />Na* = Sodium ion <br />K+ = potassium ion <br />CO' 2- = carbonate ion <br />HCO3 = bicarbonate ion <br />Cl- = chlonde ion <br />SO4 2- = sulfate ion <br />