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/~ <br />-. <br />D. hbrTNANE EXAMINATIONS ~ `~ C%~7 <br />. 1, Methane examinations will be made at the last row of permanent roof <br />1 support not less than one foot from the roof or rib, <br />2. Detection probes capable of ex tendiny at least five feet will be <br />available for closer sampling Should methane liberation become a <br />safety hazard. <br />~ • <br />• <br />Initial 11/D1 /86 <br />