PART XXIX UNDERGROUND OPERATIONS — Internal combustion engines underground

the engine has been approved as being suitable for underground use by a testing laboratory and the approval specifies the amount of ventilation required; and provide and maintain a quantity of ventilating air past the engine as specified by the approval referred to in paragraph (1)(a) or, in the absence of that approval, as provided in subsection (2); the maximum allowable volume of carbon monoxide in undiluted exhaust gases shall be less than 300 ppm for new equipment and less than 600 ppm for existing equipment; carbon monoxide in the undiluted exhaust exceeds the levels provided in paragraph (5)(a); or

before taking the engine underground for the first time, the employer submits to the minister an application for approval to use the equipment underground with where more than one engine is operating in the same ventilating circuit, provide an amount of ventilating air which amounts to the sum of the tests for diesel particulate shall be conducted in accordance with NIOSH Method 5040 from the NIOSH Manual of Analytical Methods, published by the National Institute for Occupational Health and Safety, United States, and not exceed the time weighted average of 0.4 mg/m3; and carbon monoxide or another exhaust contaminant exceeds the time weighted average in the general operating area at the operator's position.

particulars of the approval referred to in paragraph (a), (ii) a plan showing the areas of the mine in which the unit will be operated, and (iii) details of the ventilation system to be provided. 100% for the largest engine, (ii) 75% for the second largest engine, and (iii) 50% for additional engines, to a minimum of 2.81 m3 a minute for each kilowatt of the aggregate engines in the circuit; before being used underground, (ii) following a major overhaul of the engine, and (iii) not less than once in every 12 month period, or more often when requested by the occupational health and safety committee, the worker health and safety representative or the workplace health and safety designate; the results of tests and measurements required under paragraphs (c), (d), and (e), and (ii) reports of engine maintenance and repairs which may affect the engine exhaust.

Notwithstanding paragraph (1)(a), in the absence of an approval required by that paragraph, ventilation shall be maintained at 144.8 CFM per BHP.

An internal combustion engine that uses gasoline, propane or another volatile substance as a fuel shall not be used underground.

When an internal combustion engine is operated underground, an employer shall

ensure that tests are made of the undiluted exhaust gases with respect to carbon monoxide and diesel particulate, and where the tests are conducted on the surface, of respirable combustible particulates, the method of testing shall be in accordance with the Emissions Monitoring and Control Procedures as prescribed by the division.

ensure that tests are made of the atmosphere at the operator's position for carbon monoxide and oxides of nitrogen at least weekly or on the request of the operator;

ensure that the volume of air flowing in each workplace affected by the exhaust from diesel-powered equipment, is measured weekly or sooner at the request of the operator or the occupational health and safety committee, the worker health and safety representative or the workplace health and safety designate, as applicable; and

maintain a log book or recording system in which are recorded

Respecting the tests and measurements required under subsection (4),

An employer shall order the immediate shutdown of an internal combustion engine that is operated underground where

In this section, "BHP" means brake horse power.