Chapter 1. STATE MINE INSPECTOR

A fire extinguisher of suitable type and size must be carried at all times with each diesel powered unit. In addition, a fire control system shall be installed in each piece of equipment operating underground regardless of make and model. The system shall be approved by the Inspe…

The starting mechanism of the diesel engine shall be powered by electricity, air or some other source considered safe. The use of gasoline powdered starters for underground diesel equipment is specifically prohibited. Notes Ariz. Admin. Code § R11-1-324 Former Rule 3:24.

Underground refueling stations must be well ventilated and separate from any underground equipment repair areas. Diesel fuel must be carried in tight containers. Notes Ariz. Admin. Code § R11-1-325 Former Rule 3:25.

Only a day's supply of diesel fuel will be allowed underground at any time and this must be stored in tight containers in a cool, well- ventilated place. The container will be set in a sufficient amount of suitable absorbent material to absorb all of the fuel being stored or shal…

Fires shall not be built underground; open-flame torches and candles shall not be left underground. Notes Ariz. Admin. Code § R11-1-327 Former Rule 3:27.

Approved mine rescue apparatus shall be properly maintained for immediate use. The equipment shall be tested at least once a month and records kept of the tests. Notes Ariz. Admin. Code § R11-1-328 Former Rule 3:28.

No smoking is permitted in or around diesel fuel storage areas. No open lights are permitted in diesel storage or refueling areas. There must be adequate firefighting equipment at all refueling stations and storage tanks for diesel fuel. Notes Ariz. Admin. Code § R11-1-329 Former…

Gasoline shall not be taken, stored or used in underground operations. Notes Ariz. Admin. Code § R11-1-330 Former Rule 3:30; Amended effective August 18, 1980 (Supp. 80-4).

The use of liquefied petroleum gases shall be limited to maintenance work. Notes Ariz. Admin. Code § R11-1-331 Former Rule 3:31.

Fuel used in underground diesel equipment must conform to the manufacturer's specifications for viscosity pour point, cetane number, carbon residue and water. The flash point must not be less than 150° Fahrenheit and sulphur content must not be greater than 0.2% by weight. Notes …

Notes Ariz. Admin. Code § R11-1-333 Former Rule 3:33; Former Section R11-1-333 renumbered as Section R11-1-412 effective August 18, 1980 (Supp. 80-4).

A mine rescue station equipped with at least ten sets of suitable and properly maintained two-hour minimum capacity self-contained breathing apparatus, adequate supplies, and spare parts shall be maintained at mines employing 75 or more persons underground or, in lieu thereof, th…

At mines employing 75 or more persons underground, at least two rescue crews (ten persons) shall be trained at least annually in the use, care, and limitations of self-contained breathing and firefighting apparatus and in mine-rescue procedures. Other mines shall have at least on…

Notes Ariz. Admin. Code § R11-1-337

Timber in mine entrances shall be fire retardant for at least 200 feet inside the mine portal or collar, or the mine entrance shall be provided with fire protection adequate to control a fire for at least 200 feet inside the mine portal or collar. Notes Ariz. Admin. Code § R11-1-…

Notes Ariz. Admin. Code § R11-1-339

Notes Ariz. Admin. Code § R11-1-340

Suitable fire extinguishers shall be provided on self-propelled mobile equipment with enclosed cabs, used in surface operations. Notes Ariz. Admin. Code § R11-1-341 Adopted effective August 18, 1980 (Supp. 80-4).

Notes Ariz. Admin. Code § R11-1-342

Notes Ariz. Admin. Code § R11-1-343

Notes Ariz. Admin. Code § R11-1-344

Notes Ariz. Admin. Code § R11-1-345

Notes Ariz. Admin. Code § R11-1-346

Notes Ariz. Admin. Code § R11-1-347

Notes Ariz. Admin. Code § R11-1-348

Notes Ariz. Admin. Code § R11-1-349

Notes Ariz. Admin. Code § R11-1-350

Flammable and combustible waste materials, grease, lubricants or flammable liquids shall not be allowed to accumulate where they can create a fire hazard. Notes Ariz. Admin. Code § R11-1-351 Adopted effective August 18, 1980 (Supp. 80-4).

Notes Ariz. Admin. Code § R11-1-352

Where there is a potential for exposure of workers to a fire hazard, unattended stationary diesel equipment used in underground operations shall be provided with a thermal sensor which automatically stops the diesel engine should overheating occur. Notes Ariz. Admin. Code § R11-1…

Where there is a potential for exposure of workers to a fire hazard, unattended belt conveyors shall be provided with a thermal sensor which automatically stops the drive pulley should excessive slippage create an ignition of the belt. Notes Ariz. Admin. Code § R11-1-354 Adopted …

The discharge of any exhaust pipe for an internal combustion engine used for fans, power plant or engine driven compressor shall be located and so arranged that the exhaust fumes from this engine cannot under any conditions get into the intake air of the mine or the intake air of…

Dust suspected of being explosive shall be tested for explosability. If tests prove positive, appropriate control measures shall be taken. Notes Ariz. Admin. Code § R11-1-402 Former Rule 4:02.

The air intake of all compressors must be located so that no hazardous fumes or smoke can get into the air intake. The use of compressors that have a common crankcase with the internal combustion engine used to drive it is prohibited except for modern machines specifically design…

Except as permitted by R11-1-406: 1. Except as provided in subsection (2) the exposure to airborne contaminants shall not exceed, on the basis of a time-weighted average, the threshold limit values adopted by the American Conference of Governmental Industrial Hygienists. Excursio…

Dust, gas, mist, and fume surveys shall be conducted as frequently as necessary to determine the adequacy of control measures. Notes Ariz. Admin. Code § R11-1-405 Former Rule 4:05.

Control of employees' exposure to harmful airborne contaminants shall be, insofar as feasible, by prevention of contamination, removal by exhaust ventilation, or by dilution with uncontaminated air. However, where accepted engineering control measures have not been developed or w…

Air at all active underground working places shall contain at least 19.5 volume percent oxygen. Notes Ariz. Admin. Code § R11-1-407 Adopted effective April 7, 1976 (Supp. 76-2). Former Section R11-1-407 repealed, new Section R11-1-407 adopted effective August 18, 1980 (Supp. 80-4…

Ventilation doors shall be: 1. Substantially constructed. 2. Covered with fire-retardant materials, if constructed of wood. 3. Maintained in good condition. 4. Self-closing, if manually operated. 5. Equipped with audible or visual warning devices, if mechanically operated. Notes …

When ventilation control doors are opened as a part of the normal mining cycle, they shall be closed as soon as possible to re-establish normal ventilation to working places. Notes Ariz. Admin. Code § R11-1-409 Adopted effective August 18, 1980 (Supp. 80-4).

Notes Ariz. Admin. Code § R11-1-410

Notes Ariz. Admin. Code § R11-1-411

Fan housings and air ducts connecting main fans to underground openings shall be fire resistant. Notes Ariz. Admin. Code § R11-1-412 Former Section R11-1-333 renumbered as Section R11-1-412 effective August 18, 1980 (Supp. 80-4).

Notes Ariz. Admin. Code § R11-1-413

Notes Ariz. Admin. Code § R11-1-414

Notes Ariz. Admin. Code § R11-1-415

Notes Ariz. Admin. Code § R11-1-416