• 122. (1) Immediately after the taking of a measurement referred to in subsection 121(1), a notice shall be posted in a conspicuous place in the lamp house setting out the barometric pressure and the trend of the barometric pressure at the time of the posting of the notice.

• (2) The notice referred to in subsection (1) shall be kept posted until it is replaced by a notice of a subsequent measurement.

• 123. (1) A qualified person who holds a certificate as a mine examiner and carries a locked-flame safety lamp shall

  • (a) inspect at least once every seven days all shafts, other than shafts that are used solely for ventilation, and all accessible stoppings underground;

  • (b) inspect at least once every seven days the bottom and top of each shaft that is used solely for ventilation; and

  • (c) make a written report of each inspection referred to in paragraphs (a) and (b) to the underground manager.

• (2) The report referred to in paragraph (1)(c) shall set out

  • (a) the date and time of the inspection;

  • (b) a statement as to the condition of the airways and accessible stoppings; and

  • (c) the qualified person’s safety observations respecting the roof support, ventilation, stone dust and accumulations of water and concentrations of flammable or noxious gases in the airways and accessible stoppings.

124. A qualified person shall, at least once every seven days and whenever any alteration is made in the ventilation system serving a roadway on which a diesel engine is operated

• (a) measure the quantity of air passing over the roadway;

• (b) measure the concentration of flammable gas in the air in the roadway, using a methanometer;

• (c) measure the concentration of flammable gas in the air at the ends of the roadway and at a point 10 m from the downwind end of the diesel engine, using a methanometer;

• (d) measure the concentration of carbon monoxide in the air at a point 10 m from the downwind end of the diesel engine, using a carbon monoxide detector; and

• (e) record the measurements referred to in paragraphs (a) to (d) in a book kept for that purpose.

• 125. (1) A sample of the undiluted exhaust gas from every diesel engine that is operated underground shall be taken and analysed at least once every month.

• (2) Where a sample referred to in subsection (1) contains more than 2,000 ppm of carbon monoxide, the diesel engine shall be removed from service underground.

• (3) The employer shall record the result of each analysis referred to in subsection (1) in a book kept for that purpose.

• 126. (1) The mine manager shall designate the location and frequency of tests underground for flammable gas in such a manner that dangerous concentrations of gas are detected in time for

  • (a) corrective measures to be taken; and

  • (b) where necessary, employees to be evacuated safely and expeditiously.

• (2) Where an employee is required under these Regulations to test for flammable gas, the employer shall provide the employee with a methanometer that is capable of testing for flammable gas in layers, cracks, crevices and other locations that are normally beyond arm’s reach.

• (3) Every employee who tests for flammable gas shall make a record of each test in a book kept for that purpose.