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-6- <br /> TABLE 3. OVERBURDEN - ROOF AND FLOOR <br /> A. Succested Chemical Parameters <br />PR <br />Electrical Conductivity <br />Total Combustible Solids <br />Li tholocic Classification <br />Textural Analysis ' <br />$ sand <br />3 silt <br />Y clay <br />Saturation Percentage <br />Sodium Adsorption Ratio (SAR) <br />Calcium (Ca+2) <br />Magnesium (Mg+a) <br />Nitrate-Nitrite <br />+ - <br />Sodivm (Na ) <br />September 16, 1982 <br />Sal fur <br />X pyritic sulfur <br />X sulfate sulfur <br />X organic sulfur <br />total sulfur <br />Arsenic (AS) <br />Baron (B) <br />Cadmium (Cd) <br />Copper (Cu) <br />Iron (Fe) <br />Lead (Pb) <br />Manganese (Mn) <br />Mercury (Ag) <br />Molybdenum (MO) <br />Selenium (Se) <br />Zinc (Zn) <br />B. Svoeested Samplino Procedures ' <br />• 1. Overburden -Surface bii.nes '• <br />a. DriZ1 hole spacing should be approximately ors hole <br />aer 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 depth should be down to and including the <br />strata immediately underlying the coal seam. Dri1Z <br />holes should be located to maximize overburden thickness, <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. A21 carbonaceous units (rnals and carbonaceous <br />shales) in excess of one foot should be sampled. Composite <br />samaling may be done when an individual stratum exhibits uniform <br />color, ZithaZocy and mineralogy, <br />rti <br />-~ 2. Roof, Floor, Interbvrden and Coal - Underarovnd "i.nes <br />a. Dri11 hole spacing should Se aonroxi.:ateZv ore Sole ner square <br />mile. A minimum of t.9ree Grill Soles should be sampled (this <br />may require a closer drill Sole spacing for smaller :tines). <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 rnal seam, a <br />sample of the coal seam, and samnZes of interburden, partings, <br />-..-_ .. ..--- splits., etC. __ __ <br />" CorseZt t::e Division early in the mine-pZa.::.iag scsce .'or dr'ZI hole <br />iccations and oti:er specific requirements. <br />