136. (1) Subject to subsection (2), before drilling or sampling is commenced in a working place in an underground mine, the exposed faces shall be, (a)  washed with water; and (b)  carefully examined for misfires, cut-off holes and remnants of blasted holes.  R.R.O. 1990, Reg. 854, s. 136 (1). (1.1) Despite subsection (1), if it is not practical to examine for misfires, cut-off holes or remnants of blasted holes, drilling or sampling may be done using methods and procedures described in subsection (7).  O. Reg. 171/92, s. 1 (1). (2) In gypsum mines and in mines containing soluble minerals and salts where water cannot be used, (a)  an alternate method shall be used for checking each face for misfires and cut-off holes; and (b)  a written procedure detailing the method shall be prepared and followed.  R.R.O. 1990, Reg. 854, s. 136 (2). (3) Where practical, after the face has been checked all remnants of blasted holes shall be conspicuously marked by, (a)  a ring of contrasting paint or crayon; and (b)  inserting sticks or plugs into the holes for lifter remnants in a heading.  R.R.O. 1990, Reg. 854, s. 136 (3). (4) In a mine, no drilling or sampling shall be done within 160 millimetres of the bottom remnant, or an intact portion, of a hole that has been charged and blasted unless the methods and procedures described in subsection (7) are followed.  O. Reg. 171/92, s. 1 (2). (5) In a mine, no drilling or sampling shall be done within one metre of any hole containing explosives unless the methods and procedures described in subsection (7) are followed.  O. Reg. 171/92, s. 1 (3). (6) No development heading shall be abandoned or work therein discontinued until, (a)  the material broken at the firing of the last round has been cleared from the face; and (b)  the whole face of the heading examined for explosives in misfires or remnants of holes.  R.R.O. 1990, Reg. 854, s. 136 (6). (7) For the purposes of subsections (1.1), (4), (5) and 139 (3), drilling or sampling may be done using methods and procedures developed by the employer and the workers involved in the task and agreed upon by the joint health and safety committee or the health and safety representative for the workplace, (a)  if the employer gives notice, at least ten days before implementing the methods and procedures, to each union representing workers at the workplace; (b)  if the employer ensures that workers are trained in the methods and procedures; and (c)  if the employer publicizes the methods and procedures and displays them in the workplace before implementing them.  O. Reg. 171/92, s. 1 (4); O. Reg. 272/97, s. 25. (8) Subject to subsection (9), if a frozen cut is encountered, drilling may be done only if it is done in accordance with methods and procedures developed by the employer and the workers involved in the task and agreed on by the joint health and safety committee or the health and safety representative for the workplace.  O. Reg. 291/02, s. 6. (9) No collaring may be done within 300 millimetres of a frozen cut or if there is a possibility of intersecting any portion of a frozen cut, unless the methods and procedures of subsection (7) are used.  O. Reg. 291/02, s. 6. (10) In subsections (8) and (9), “frozen cut” means the first holes blasted in a development round that do not break the rock as intended, but rather shatter and cover over with no explosives visible.  O. Reg. 291/02, s. 6.