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State Req. <br />• variability is documented. These investigations and recommendations <br />are intended to optimize postmine vegetation growth and groundwater <br />aquifer characteristics. <br />Conclusions and recommendations are based on the interpretation of <br />laboratory data and lithological descriptions developed during the analy- <br />sis of the cores. <br />Selection of Overburden Parameters. <br />The Wyoming DEO Guideline No. I (WDEQ, 1977) and Montana bSL <br />Guideline for Overburden Material (MDSE, 1977a) lists twenty-eight (28) <br />chemical and physical parameters to be determined for the evaluation of <br />overburden material. These parameters are: <br />- pH <br />• = Conductivity (EC) mmhos/cm at 25° C. <br />Saturation Percentage (SP) <br />- Particle Size (°~ sand, clay, silt, VFS) <br />- Texture Class <br />- Water Soluble Calcium (Ca), Magnesium (Mg), and Sodium (Na) <br />- Sodium Adsorption Ratio (SAR) <br />- Exchangeable Sodium Percentage (ESP) if SAR> 10 <br />- Copper (Cu) <br />- Cadmium (Cd) <br />- Iron (Fe) <br />- Manganese (Mn) <br />- Zinc (Zn) <br />- Nickel (Ni) <br />- Mercury (Hg) <br />- Acid-Base Potential (ABP) <br />- Nitrate (NO3-N) and Ammonium (NH4+-N) Nitrogen <br />- Selenium (Se) <br />. - Boron (B) <br />- Molybdenum (Mo) <br />- Lead (Pb) <br />6-II Revised 5/27/1981 <br />