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.
EXPLOSION AND FIRE PROTECTION
Flammable Gas Tests
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.
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