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September 16, 1982 <br /> -6- <br /> LE <br /> 3. OVERBURDEN - ROOF AND FLOOR <br /> A. Suggested Chemical Parameters <br /> _ pH sulfur <br /> Electrical Conductivity % pyritic sylfur <br /> % sulfate sulfur <br /> Total Combustible Solids % organic sulfur <br /> Lithologic Classifjcation total sulfur <br /> Textural Analysis Arsenic (As) <br /> % sand <br /> % silt Boron (B) <br /> Z clay Cadmium (Cd) <br /> Saturation Percentage Copper (Cu) <br /> Sodium Adsorption Ratio (SAR) Iron (Fe) <br /> Calcium (Ca+2) Lead (Pb) <br /> ~ Magnesium (Mg 2) Manganese (.In) <br /> Nitrate-Nitrite Mercury (Bg) <br /> Sodium (Na+) Mol ybden um (Mo) <br /> Seleni um (se) <br /> B. Suggested Sampling Procedures + Zinc (Zn) <br /> 1. Overburden - Surface !Sines +� <br /> i <br /> a. Drill hole spacing should be approximately or- hole <br /> Der square mile. A minimum of three drill holes should <br /> be sampled (this may require a closer drill hole spacing <br /> for smaller mines) . <br /> b. Drill hole death should be down to and including the <br /> strata immediately underlying the coal seam. Drill <br /> holes should be located to maxirlize overburden t-Uctmess. <br /> c. Generally, each individual stratum should be sampled. For <br /> thinly bedded strata (interbedded strata with individual beds <br /> _--_ less than 4 feet thick), samples may be composited in 4-foot <br /> intervals. All carbonaceous units (coals end carbonaceous <br /> shales) in excess of one foot should be sampled. Composite <br /> sampling may be done when an individual stratum exhibits uniform <br /> _ ,• color, lithology and mineralogy. <br /> `- 2. Roof, Floor, Interburden and Coal - Underground "fines <br /> r - a. Drill hole spacing should :e avnroxirmtelu one hole per struare <br /> _ mile. A minimum of t'zree ari11 holes should be sampled (this <br /> may require a closer drill -hole spacing for smaller mines).- <br /> b. For each coal seam to be mined, the following samples should <br /> be analyzed; a composite sample from the first ten feet of <br /> strata overlying the coal seam, a composite sample from the <br /> first five feet of the stratum underlying the coal seam, a <br /> sample of the coal seam, and samples of interburden, partings, I <br /> splits, etc. <br /> * Consult the Division early in the mine- lazu2inc - �; - I <br /> locations and other specific. re p - stage for d�_Zi hole <br /> qui rerr�n is. <br />