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ROOF, FLOOR, INTERBURDEN, COAL, & REFUSE PILE SAMPLING <br /> Proposed Sampling Procedures <br /> Roof, Floor, Interburden and Coal <br /> a. Drill hole spacing should be approximately one hole per square mile. <br /> b. For each coal seam to be mined, the following samples should be <br /> analyzed; roof 8v floor samples will be collected as composite <br /> samples from strata approximately 5 feet overlying and 5 feet <br /> underlying the coal seam, or at site specific intervals determined to <br /> be most likely to be mined and transported to the refuse pile at <br /> King I, a sample of the coal seam, and samples of interburden, partings, <br /> splits, etc. <br /> Pro osed Chemical Parameters & Methods of Anal is <br /> Chemical <br /> Parameter Units Methods of Analysis <br /> pH (paste) pH units Saturated paste <br /> Electrical Conductivity umhos cm Saturated paste extract <br /> Total Combustible Solids PPM Dry ash; D 3174-73 <br /> Litholo 'c Classification - Visual observation <br /> Textural Analysis <br /> % sand % Sieve analysis <br /> % silt % Hydrometer <br /> % clay % Hydrometer <br /> Saturation Percentage % Saturated paste <br /> Sodium Adsorption Ratio - Saturated paste extract <br /> Calcium (Ca+2) Saturated paste extract <br /> Magnesium (Mg+2) Saturated paste extract <br /> Nitrate-Nitrite ppm Saturated paste extract <br /> Sodium (Na+) ppm Saturated paste extract <br /> Sulfur <br /> Pyritic Sulfur % D 2492-79 <br /> % Sulfate Sulfur % D 2492-79 <br /> % Organic Sulfur % D 2492-79 <br /> Total Sulfur ppm D 3177-75 <br /> Arsenic As m AB-DTPA Ammonium Bicarbonate <br /> Boron B m Saturated paste extract <br /> Cadmium Cd AB-DTPA; DTPA <br /> Copper (Cu) AB-DTPA; DTPA <br /> Iron Fe m AB-DTPA; DTPA <br /> Lead Pb m AB-DTPA; DTPA <br /> Manganese Mn m AB-DTPA; DTPA <br /> Mercury H m Acid extract <br /> Molybdenum (Mo) ppm AB-DTPA; Ammonium oxilate <br /> Selenium Se m AB-DTPA; Hot water extract <br /> Zinc (Zn) AB-DTPA; DTPA <br /> GCC Energy, LLC King 11 Appendix 4(8A) (PR-10) June 12, 2020 <br />