create a safety audit for a site that is tunnels and shafts doesnt have to be as technical as what a site engineer would do

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# 1926.800 UNDERGROUND CONSTRUCTION. (cont.) ## (j) Air quality and monitoring. (cont.) (vi) When the competent person determines, on the basis of air monitoring results or other information, that air contaminants may be present in sufficient quantity to be dangerous to life, the employer shall: (A) Prominently post a notice at all entrances to the underground jobsite to inform all entrants of the hazardous condition; and (B) Ensure that the necessary precautions are taken. (vii) Whenever five percent or more of the lower explosive limit for methane or other flammable gases is detected in any underground work area(s) or in the air return, steps shall be taken to increase ventilation air volume or otherwise control the gas concentration, unless the employer is operating in accordance with the potentially gassy or gassy operation requirements. Such additional ventilation controls may be discontinued when gas concentrations are reduced below five percent of the lower explosive limit, but shall be reinstituted whenever the five percent level is exceeded. (viii)* (ix) Whenever 20 percent or more of the lower explosive limit for methane or other flammable gases is detected in any underground work area(s) or in the air return: (A) All employees, except those necessary to eliminate the hazard, shall be immediately withdrawn to a safe location above ground; and (B) Electrical power, except for acceptable pumping and ventilation equipment, shall be cut off to the area endangered by the flammable gas until the concentration of such gas is reduced to less than 20 percent of the lower explosive limit. (2) Additional monitoring for potentially gassy and gassy operation. Operations which meet the criteria for potentially gassy and gassy operations set forth in paragraph (h) of this section shall be subject to the additional monitoring requirements of this paragraph. (i) A test for oxygen content shall be conducted in the affected underground work areas and work areas …

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# LAND REQUIREMENTS (cont.) ## TUNNELS (cont.) (a) shall be designed by an engineer in accordance with good engineering practice to withstand all loads likely to be applied to them; and (b) shall be constructed in accordance with the design. O. Reg. 213/91, S. 307 (6); O. Reg. 375/22, S. 5. (7) The constructor shall keep available for inspection at a project the design drawings for the primary supports. O. Reg. 213/91, S. 307 (7); O. Reg. 85/04, S. 23. 308. A tunnel shall be kept reasonably free of water when a worker is required to be in the tunnel. O. Reg. 213/91, S. 308. ## TUNNEL EQUIPMENT 309. When a haulage locomotive, trackless haulage equipment or a hoist in a shaft or tunnel is left unattended, (a) its controls shall be left in the neutral position; and (b) its brakes shall be set or other measures, such as blocking, shall be taken to prevent its moving. O. Reg. 213/91, S. 309. a 310. (1) A haulage locomotive shall have suitable brakes, an audible bell and controls that can be operated only by worker at the driver's station. O. Reg. 213/91, S. 310 (1). (2) A haulage locomotive shall be designed so that power for its driving mechanism is cut off unless the control regulating the power is continuously operated by a worker at the driver's station. O. Reg. 213/91, S. 310 (2). (3) The driver of a haulage locomotive shall sound the bell when the locomotive is set in motion or is approaching someone. O. Reg. 213/91, S. 310 (3). (4) No person other than the driver shall ride on a haulage locomotive. O. Reg. 213/91, S. 310 (4). 311. No worker shall ride on a haulage train except in a car provided to carry passengers. O. Reg. 213/91, S. 311. 312. A haulage car shall have a device to prevent uncontrolled travel by the car. O. Reg. 213/91, S. 312. 313. (1) Track for haulage equipment shall be securely fastened to the ties on which it is laid. O. Reg. 213/91, S. 313 (1). (2) If the ties interfere with the use of the bottom of the tunnel as a walk…

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# CONSTRUCTION STANDARD (cont.) ## R 408.[redacted postal code]. Safety generally. (cont.) activity will not cause any environmental hazard or structural failure within the facilities. (8) All employees shall be instructed in the recognition and avoidance of hazards that are associated with all of the following underground construction activities: (a) Air monitoring. (b) Ventilation. (c) Illumination. (d) Communications. (e) Flood control. (f) Mechanical equipment. (g) Personal protective equipment. (h) Explosives. (i) Fire prevention and protection. (j) Emergency procedures, including evacuation plans and check-in and check-out systems. (9) The employer shall issue each employee a copy of the project's general safety rules before the employee commences work at the project. (10) Each employer shall designate a qualified person who is responsible for administering the safety program. A written record shall be maintained of the safety training program. (11) Before an employee enters a tunnel where the atmosphere may be hazardous due to a condition such as a deficiency of oxygen, or may be toxic in excess of the maximum allowable limits, the tunnel shall be tested and the results shall be recorded as prescribed in occupational health standard Part 665. Underground Construction, Caissons, Cofferdams, and Compressed Air, which is referenced in R 408.[redacted postal code]. The records shall be maintained at the jobsite. If the atmosphere is hazardous, either sufficient ventilation to eliminate the hazard shall be provided or respiratory equipment as prescribed by the Department of Licensing and Regulatory Affairs shall be worn. (12) If an atmosphere is found to be explosive, then sparks, flame, and other sources of ignition shall be prohibited and ventilation shall be provided until the hazard has been reduced and maintained at or below the maximum allowable limits as prescribed by the Department of Licensing and Regulatory Affairs. ## 408.[red…

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# LAND REQUIREMENTS (cont.) ## COMMUNICATIONS (cont.) (4) A notice shall be posted by each telephone, (a) indicating how to call every other telephone in the system; (b) describing the emergency signal to be used; and (c) stating that a worker who hears the emergency signal shall answer the telephone. O. Reg. 213/91, S. 270 (4). (5) A telephone system shall be installed in such a way that a conversation can be carried on between any two telephones in the system. O. Reg. 213/91, S. 270 (5). (6) The voice communication circuits used in a telephone system shall be independent from the circuits used to signal from one telephone to another. O. Reg. 213/91, S. 270 (6). 271. During the construction of a shaft, an effective means of communicating between the lowest point of the shaft and the surface shall be provided. O. Reg. 213/91, S. 271. 272. A completed service shaft more than six metres deep shall have a means, other than a telephone, of exchanging distinct and definite signals between the top and bottom of the shaft. O. Reg. 213/91, S. 272. 273. (1) If a person is about to be conveyed by a hoist in a shaft, the pit bottom worker shall notify the hoist operator before the person enters the conveyance. O. Reg. 213/91, S. 273 (1). (2) A hoist operator shall acknowledge every signal received by repeating the signal. O. Reg. 213/91, S. 273 (2). (3) A signal to a hoist operator to move a conveyance shall be given only from the landing from which the conveyance is being moved. O. Reg. 213/91, S. 273 (3). (4) A signal set out in Column 1 of the Table shall be used to communicate the meaning set out opposite to it in Column 2 between a hoist operator, the top or bottom of a shaft and all landings in the shaft: TABLE <table><tr><th>Item</th><th>Column 1 Code of signals</th><th>Column 2 Meaning</th></tr><tr><td>1.</td><td>Where the conveyance is in motion - 1 signal</td><td>STOP</td></tr><tr><td>2.</td><td>Where the conveyance is stationary — 1 signal</td><t…

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# CONSTRUCTION STANDARD (cont.) ## R 408.[redacted postal code]. Fire prevention and protection. (cont.) (14) In an underground operation, local gas checks shall be made before and during a welding or cutting operation and during a drilling operation that would penetrate the tunnel. (15) Whenever 5% or more of the lower explosive limit for methane or other flammable gases is detected in any underground work area or in the air return, an employer shall take steps to increase ventilation air volume or otherwise control the gas concentration, unless the employer is operating in accordance with the potentially gassy or gassy operation requirements. Such additional ventilation controls may be discontinued when gas concentrations are reduced below 5% of the lower explosive limit, but shall be reinstituted whenever the 5% level is exceeded. (16) Whenever 10% or more of the lower explosive limit for methane or other flammable gases is detected in the vicinity of welding, cutting, or other hot work, such work shall be suspended until the concentration of such flammable gas is reduced to less than 10% of the lower explosive limit. (17) A fire watch shall be maintained around welding and cutting operations until all possibility of fire is eliminated. The fire watch shall be provided with a minimum of 1 approved 2A-10BC fire extinguisher. (18) Flammable materials or supplies, other than those used during 1 shift, shall not be stored within 100 feet (30.48 meters) of any tunnel or shaft opening. If this is not feasible because of space limitations on the jobsite, then such materials may be located within the 100 foot limit, if both of the following provisions are complied with: (a) The materials are located as far as practicable from the opening. (b) A fire resistant barrier of not less than a 1-hour rating is placed between the stored material and the opening or additional precautions are taken that will protect the materials from ignition sources. ## TUNNELS AND SHAFT…

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# CONSTRUCTION STANDARD (cont.) ## R 408.[redacted postal code]. Electrical requirements. (cont.) prescribed in Construction Safety Standard Part 17 "Electrical Installations," as referenced in R 408.[redacted postal code]. (5) The regular system of illumination shall be supplemented by lighting that can be activated upon the failure of the regular system. Supplemental lighting, such as approved flashlights or lanterns, shall be sufficient to allow all employees to evacuate the tunnel. (6) Electrical installation in underground areas where oil, grease, or diesel fuel are stored shall be used only for lighting fixtures. (7) Lighting fixtures in storage areas, or within 25 feet (7.62 meters) of underground areas where oil, grease, or diesel fuel are stored, shall be approved for class I, division 2 locations, as prescribed in Construction Safety Standard Part 17 "Electrical Installations," as referenced in R 408.[redacted postal code]. ## R 408.[redacted postal code]. Fire prevention and protection. - Rule 1467. (1) The applicable requirements for fire prevention and protection as prescribed in Construction Safety Standard Part 18. "Fire Prevention and Protection," as referenced in R 408.[redacted postal code], shall be complied with in all tunnel and shaft operations. (2) Smoking and open flames are prohibited. An employer is responsible for collecting all personal sources of ignition, such as matches and lighters, from all persons. Welding and cutting, where required, shall comply with the provisions of subrules (9) to (14) of this rule. A fire watch shall be maintained when hot work is performed. (3) Not more than a 1-day supply of diesel fuel shall be stored in a tunnel or shaft. Gasoline or liquefied petroleum gas shall not be taken in a tunnel or shaft. Acetylene or methylacetylene propadiene stabilized gas may be used underground solely for welding, cutting, and other hot work and only as prescribed in Construction Safety Standard Part 7. "Welding and …

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# CONSTRUCTION STANDARD (cont.) ## R 408.[redacted postal code]. Definitions; A to H. (cont.) (11) "Escape-only respirator" means a respirator intended to be used only for emergency exit. (12) "High air" means air pressure used to supply power to pneumatic tools and devices. ## R 408.[redacted postal code]. Definitions; M to W. Rule 1456. (1) "Man lock" means a chamber through which employees pass from 1 air pressure environment into another. (2) "Materials lock" means a chamber through which materials and equipment pass from 1 air pressure environment into another. (3) "Occupied tunnel" means any tunnel entered by 1 or more employees. (4) "Pressure" means a force acting on a unit area, usually shown as pounds per square inch (p.s.i.). (5) "Qualified person" means a person who, by possession of a recognized degree, certificate, or professional standing, or who by extensive knowledge, training, and experience, has successfully demonstrated the ability to solve or resolve problems relating to the subject matter, the work, or the project. (6) "Safety screen" means an airtight and watertight diaphragm placed vertically across the upper part of a compressed air tunnel between the face and bulkhead in order to restrain sudden flooding of the crown of the tunnel between the safety screen and the bulkhead, thus providing a means of refuge and exit from a flooding or flooded tunnel. (7) "Shaft" means a vertical or inclined opening excavated below ground level, that is for the purpose of tunnel operations. (8) "Tunnel" means a generally horizontal excavation or facility more than 14 inches in diameter, width, or height and more than 6 feet in length below ground or water. Facilities used for the acquisition of minerals, ores, and fossil fuels, which are commonly known as mines, are excluded from this definition. (9) "Working chamber" means the space or compartment under air pressure in which the work is being done. ## R 408.[redacted postal code]. Advance notice…