reglab/statecodes huggingface dataset:
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 22 - Fire Prevention and Control › Underground › Section 7064 - (4-46). Combustible Liquids and Gases-Surface Storage

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) Combustible liquids and gases shall be
						stored at least 100 feet from the following:
(1) Mine openings
(2) Buildings and snow sheds connected to
						mine openings
(3) Ventilation fan
						houses
(4) Hoist houses
(5) Explosive magazines
The storage place shall be located where contents of
						  leaking containers cannot run over the surface to any point within 100 feet of
						  the above-mentioned places and structures.
NOTE: Certain petroleum gases, such as butane and
						  propane, are compressed to liquid form in pressure tanks. When a tank
						  containing liquefied petroleum gases leaks or is ruptured, the contents
						  vaporize in the atmosphere. These vapors are heavier than air and will flow
						  downhill over the surface of the ground much like water until the vapors are
						  diffused. For this reason tanks containing liquefied petroleum gases must be
						  stored at locations which are in compliance with the provisions of this
						  section.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 22 - Fire Prevention and Control › Underground › Section 7065 - (4-54). Fuels, Lubricants, and Rope Dressings-Underground Storage and Handling

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) Oils, greases,
						and rope dressings taken underground shall be transported and stored in closed
						metal containers that will not permit the contents to leak or spill.
(b) Rope dressings shall not be stored in the
						mine.
(c) The underground storage
						place for oils and greases shall be located in a remote place where there will
						be the least danger to men in the mine should a fire occur.
Where practical, the storage place shall be at least 25
						  feet from any timbers. Where it is necessary to store oils or greases nearer
						  than this distance to mine timbers, such timbers shall be made fire
						  resistant.
Should the amount of oil or grease stored on any 1
						  level exceed 60 gallons, it shall be stored in a manner acceptable to the
						  Division.
(d) The storage
						place shall be so arranged that the contents of leaking containers cannot run
						from the storage place.
(e)
						Adequate drip pans shall be provided at the storage places of oils, greases,
						and rope dressings.
(f) Leaking
						containers or fittings shall be promptly repaired or replaced.
(g) Spillage and leakage shall be promptly
						cleaned up and sent to the surface.
(h) No combustible materials shall be
						permitted in any oil or grease storage place.
(i) (4-52) Gasoline shall not be taken,
						stored, or used under--ground except in permissible flame safety
						lamps.
(j) (4-53) The use of
						liquified petroleum gases shall be limited to maintenance work.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 25 - Engines-Internal Combustion › Underground › Section 7068 - Internal-Combustion Engines Near Mine Openings

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
No internal-combustion engine shall be permitted on the
						  surface within 50 feet of any mine opening.
EXCEPTION: This does not apply to self-propelled
						  vehicles which are not operated as stationary equipment.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 25 - Engines-Internal Combustion › Underground › Section 7069 - Engines Prohibited Underground

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
No fuel-burning or internal-combustion engine, other
						  than diesels as allowed in Section
						  7070 of these Orders, shall be
						  permitted to operate in any mine.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 25 - Engines-Internal Combustion › Underground › Section 7070 - Permit to Use Diesel Engines Underground

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) No diesel engine shall be permitted in an
						underground mine unless a permit to use diesel engines underground has first
						been secured from the Division of Industrial Safety.
(b) Application for such permit shall be made
						in writing to the Division of Industrial Safety, and shall include the
						following information:
(1) Service for which
						diesel engines are intended.
(2)
						Location in mine where engines are to be operated.
(3) Aggregate brake horsepower of all diesel
						engines to be operated in the mine.
(4) Plans for ventilation of the
						mine.
(5) Any other information
						considered pertinent by the Division.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 25 - Engines-Internal Combustion › Underground › Section 7071 - Fueling Diesel Engines Underground

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) Diesel engines shall not be fueled
						underground where it is practical to fuel them on the surface.
(b) When fueled underground the engine shall
						be taken to the fuel storage place, if practical, and the fuel pumped directly
						from the storage container to the engine fuel tank.
(c) (4-54) When the engine must be fueled
						away from the fuel storage place, the fuel shall be transported in closed metal
						containers that will not permit the contents to leak or spill should the
						container be overturned.
(d) The
						engine shall be shut down during fueling operations.
(e) Precautions shall be taken to prevent
						spilling during fueling operations. Spilled fuel shall be promptly cleaned up
						and removed.
(f) The use of
						compressed air to force fuel from a container is prohibited.
(g) (4-1) No fire, smoking, open lights, or
						other source of ignition shall be permitted near fueling operations.
NOTE: See Section
						  7065 for orders pertaining to
						  storage of fuels and lubricants.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 26 - Emergency Plan › Underground › Section 7074 - (4-50). Emergency Plan

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) The
						operator of every mine which employs men underground or is required by these
						Orders to provide an escape exit shall prepare a general plan of action for use
						in time of emergency.
(b) The plan
						shall outline the duties and responsibilities of each mine official and key man
						so that each will know what is expected of him should a fire, explosion, or
						other emergency occur.
(c) The plan
						shall be posted conspicuously on the mine safety bulletin board and in the mine
						office.
(d) All officials and key
						men shall be thoroughly instructed in their duties so as to avoid contradictory
						orders and confusion at a time when promptly and efficient action is
						needed.
(e) Workmen, both surface
						and underground, shall be informed of the plan, and each man shall be told what
						is expected of him in case of explosion, fire, or other emergency.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 26 - Emergency Plan › Underground › Section 7075 - (4-51). Emergency Alarm System

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) An emergency alarm system adequate to
						give warning to all employees underground shall be installed and maintained in
						good working order at all mines.
(b) Where compressed air is available at all
						times that an employee is in the mine, it is recommended that a stench method
						of warning be used. Where compressed air is not available, some other warning
						system acceptable to the Division shall be used.
(c) Warning shall be given immediately to all
						persons underground upon occurrence of fire or other emergency in or near the
						mine.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 26 - Emergency Plan › Underground › Section 7076 - (4-50) (11-53). Fire and Safety Diagram

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) A diagram of the mine shall be provided
						showing the location of:
(1) Principal
						levels
(2) Shafts
(3) Tunnels
(4) Manways
(5) Escape routes
(6) Fire doors
(7) Fire extinguisher
(8) Water and air lines available for
						fighting fire
(9)
						Telephones
(10) Refuge
						stations
(11) Ventilation
						doors
(12) Direction of air
						flow
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 26 - Emergency Plan › Underground › Section 7077 - (11-53). Maps

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) The
						operator of every mine shall make and maintain, or cause to be made and
						maintained, a clear and accurate map, showing all the workings of such mine.
						All underground workings shall be surveyed and mapped before they are allowed
						to become inaccessible.
(b) Mine
						maps shall be brought up to date at least once every six months.
(c) The mine maps shall be available near the
						mine for inspection by the Division.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 27 - Escapeways and Refuge Stations › Underground › Section 7080 - Escapeways and Refuge Stations

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) (11-50) Every mine shall have two
						separate escapeways to the surface which are so positioned that damage to one
						shall not lessen the effectiveness of the other, or a method of refuge shall be
						provided when only one opening to the surface is possible.
(b) The escape exit shall be maintained
						within reasonable distance of the toping areas of the mine.
When the distance between the escape exit and any stope
						  is computed by the following formula and the answer is one or more, the escape
						  exit shall be extended in the direction of such stope until it is reasonable
						  close.
T
+
S
= D
1000
300
T = distance in feet of horizontal travel.
S = distance in feet of vertical and inclined
						  travel.
D = symbol for total distance of travel.
For the purpose of this formula, an incline of less
						  than 20 degrees from the horizontal will be considered as a horizontal
						  passageway.
(c) (11-51a)
						Escape exits shall be maintained in good condition at all times so as to
						provide a ready means of escape for employees in case of emergency.
(d) (11-51b) All underground passageways and
						shaft stations shall be signed and marked by arrows pointing the way to and
						through the escape exit in a manner to expedite escape.
(e) The surface outlets from escape exits
						shall be not less than 100 feet from the exit most frequently used by the men.
The surface outlet of no two exits shall be covered by
						  one building or by connected buildings.
(f) Where the use of a series or raises is
						contemplated for an emergency exit, the mine management is strongly advised to
						select the position of the raises so as to have them in line with one another,
						so that hoisting equipment can be installed if advisable at some future
						time.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 27 - Escapeways and Refuge Stations › Underground › Section 7081 - Refuge Stations

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a)
						When the Division deems it necessary for the protection of employees, it may
						require that refuge stations be provided and maintained at such places within
						the mine as the Division may direct.
(b) Where feasible, the refuge station shall
						be located where it has two exits to the surface.
(c) (11-52d) The refuge station shall be
						provided with a water line, compressed air line, and telephone connection
						through each exit to the surface. The air lines and water lines shall be
						equipped with suitable valves which can be readily operated without the use of
						a tool.
(d) (11-52a c) Each refuge
						station shall be provided with fire doors so it can be isolated from other
						parts of the mine.
(e) (11-52b)
						Refuge chambers shall be large enough to accommodate readily the normal number
						of men in the particular area of the mine.
(f) (11-54) Telephone or other voice
						communication shall be provided between the surface and refuge chambers and
						such systems shall be independent of the mine power supply.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 30 - Rescue Stations and Equipment Underground › Section 7083 - Mine Rescue Stations

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a)
					 (4-67). Every mine at which more than fifty (50) men work underground at one
					 time shall be provided with a mine rescue station located at or near the mine,
					 or shall be a member of a cooperative mine rescue station located no greater
					 distance from the member mine than can be covered by the most convenient means
					 of transportation in 2 hours during any season of the year.
(b) At each mine in which the Division
					 considers there is a serious hazard from mine fires or mine gases, the Division
					 may require the installation of a mine rescue station, with apparatus and
					 equipment as specified in Section
					 7084.
(c) (4-70) Smaller mines having 10 to 50 men
					 underground at one time shall join a cooperative mine rescue station or shall
					 have one man for each 10 underground employees or fraction thereof trained
					 annually in the use of breathing apparatus.
It is recommended that small mines, regardless of size,
						affiliate with a cooperative mine rescue station wherever practical. Where it
						is not practical, each mine should have some man in its organization who is
						trained and qualified in the use of breathing apparatus, to accompany mine
						rescue crews into the mine in case of emergency. This man should be familiar
						with the mine workings, mine ventilation, water lines, electrical circuits, and
						underground hoists.
(d) Each
					 rescue station shall be in the immediate charge of a competent and responsible
					 man. The man in charge need not be employed exclusively at the rescue station,
					 but his employment shall be arranged so that he, or a competent and responsible
					 substitute, shall be promptly available in case of need.
(e) Telephone, or other equally rapid means
					 of communication, shall be maintained between the residence of the man in
					 charge and the rescue station and every mine affiliated with the rescue
					 station.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 30 - Rescue Stations and Equipment Underground › Section 7084 - (4-67) (4-69). Mine Rescue Equipment and Supplies

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) Except as provided in subsection (b) of
					 this section, each mine rescue station shall be provided with the following
					 respiratory equipment, supplies, and spare parts:
(1) Ten sets of permissible self-contained
					 two-hour oxygen breathing apparatus.
(2) Sufficient spare parts to assemble one
					 complete breathing apparatus in good working order.
(3) One high-pressure oxygen pump for
					 recharging oxygen bottles.
(4) An
					 emergency supply of oxygen and regenerator charges sufficient to keep 10 sets
					 of breathing apparatus running for 10 hours.
(5) One signal line 1200 feet long and 1 reel
					 for the signal line.
(6) Ten
					 permissible electric cap lamps and charger.
(7) Necessary gas detection and ventilation
					 instruments.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 30 - Rescue Stations and Equipment Underground › Section 7085 - (4-67) (4-69). Mine Rescue Training and Procedure

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) Each mine required by Section
					 7083 (a) to have a
					 mine rescue station or to be a member of a cooperative mine rescue station
					 shall have at least 10 men trained annually in the use of permissible breathing
					 apparatus as recommended by the U.S. Bureau of Mines.
A mine which is a member of a cooperative mine rescue
						station and which has fewer than 50 men underground at one time shall have
						trained annually in the use of breathing apparatus at least 1 man for each 10
						underground employees or fraction thereof.
(b) At mines that are required to have men
					 who are trained in the use of permissible breathing apparatus, at least 5 men
					 shall practice with the apparatus each month, said practice to include work in
					 an irrespirable atmosphere for at least 30 minutes. Five other men shall be
					 trained the following month. Additional men should be trained. Where it is
					 desirable to do so, 10 men may be trained every 2 months, instead of training 5
					 men each month.
All men designated to take this training shall be given a
						careful physical examination, and no man physically unfit for the work shall be
						allowed to take the training.
(c) Where practical, not more than 50 percent
					 of the regular mine rescue crew shall be regularly employed underground at one
					 time.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 31 - Air Quality, Radiation, and Ventilation › General › Section 7090 - Environmental Controls

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a)
						(5-1a) The exposure to airborne contaminants of a person working in a mine
						shall not exceed, on the basis of a time-weighted average, the threshold limit
						values adopted by the American Conference of Governmental Industrial
						Hygienists, as set forth and explained in the most recent edition of the
						Conference's publication entitled "Threshold Limit Values of Airborne
						Contaminants." Excursions above the listed threshold limit values shall not be
						of a greater magnitude than is characterized as permissible by the Conference.
						This paragraph (a) does not apply to airborne contaminants given a "C"
						designation by the Conference--for example, nitrogen dioxide.
(b) (5-1b) Employees shall be withdrawn from
						areas in which there is a concentration of an airborne contaminant given a "C"
						designation by the Conference which exceeds the threshold limit value (ceiling
						"C" limit) listed for that contaminant.
(c) General Industry Safety Orders for
						control of Dust, Fumes, Mists, Vapors, and Gases shall be minimum standards for
						mines.
(d) (5-2) Dust, gas, mist,
						and fume surveys shall be conducted as frequently as necessary to determine the
						adequacy of control measures.
(e)
						(5-5) Respirators shall not be substituted for environmental control measures.
						However, where environmental controls have not been developed or when necessary
						by nature of the work involved (for example, welding, sandblasting, lead
						burning), a person may work for reasonable periods of time in concentrations of
						airborne contaminants which exceed ceiling "C" limits or the limit of
						permissible excursions referred to in (a) and (b), if such person wears a
						respiratory protective device approved by the Bureau of Mines as protection
						against the particular hazards involved.
(f) (20-5) Carbon tetrachloride shall not be
						used unless under strict environmental controls.
(g) (20-9) Dusts suspected of being explosive
						shall be tested for explosibility. If tests prove positive, appropriate control
						measures shall be taken.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 31 - Air Quality, Radiation, and Ventilation › General › Section 7091 - (5-37)-(5-42). Underground Radiation Hazards

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
The mandatory radiation standards of the Mine Safety
						  and Health Administration for Metal and Non-Metallic Underground Mines,
						  published July 31, 1969, February 25, 1970, and December 8, 1970, are adopted
						  for control of underground radiation hazards.
1.
						  Amendment filed 1-17-80; effective thirtieth day thereafter (Register 80, No.
						  3).
Note: Authority cited: Section
							 142.3, Labor
							 Code. Reference: Section
							 142.3, Labor
							 Code.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 31 - Air Quality, Radiation, and Ventilation › Surface › Section 7092 - (5-3). Dust Control While Drilling

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
When drilling holes with machines in rock or other
						  dust-producing material, such dust shall be controlled as required by the
						  General Industry Safety Orders.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 31 - Air Quality, Radiation, and Ventilation › Underground › Section 7093 - (5-3). Dust-Rock Drilling

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a)
						For the purpose of these Orders "rock drilling" means drilling, cutting,
						chipping, channeling, or broaching rock by means of machinery.
"Wet drilling" means the continuous application of
						  water through the central hole of hollow drill steel to the bottom of the drill
						  hole.
(b) Rock drilling in
						underground mines is prohibited unless the dust is controlled by wet drilling
						or other means acceptable to the Division.
(c) Rock drilling machines purchased and used
						for wet drilling after the effective date of these Orders shall be equipped
						with a combination air throttle and water valve, so designed that the air
						cannot be turned on without turning on the water, and the water cannot be
						turned off without turning off the air.
(d) During wet drilling, the water flow shall
						be maintained continuously whenever the drill is in operation, including the
						period of collaring or starting the hole.
(e) Water for wet drilling shall be supplied
						to the drill in adequate quantities at a pressure of at least 40 pounds per
						square inch.
(f) Should the water
						supply or pressure for wet drilling become inadequate, such drilling shall be
						stopped immediately.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 31 - Air Quality, Radiation, and Ventilation › Underground › Section 7094 - (5-1). Dust -Mucking and Transferring Rock

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) The muck pile shall be wet down before
						mucking begins and shall be kept wet during the entire mucking operation to
						control the dust.
It is recommended that a continuous spray of water be
						  maintained on muck piles where mucking machines are being
						  operated.
(b) Water
						sprinklers shall be installed and used on all chutes from which dusty rock is
						taken, or other equally effective means acceptable to the Division shall be
						used to prevent harmful accumulations of dust in the atmosphere.
(c) Whenever a sprinkling device is installed
						at a chute, it shall be so placed that it can be operated by the workmen who
						operate the chute gates.
The spray shall be directed into the chute and away
						  from the operator's position at the chute.
(d) To prevent spillage from loaded cars and
						trackless haulage vehicles from adding to the mine dust, the loaded car or
						vehicle shall not be moved away from the loading spot until the load has been
						trimmed and leveled so as to prevent spillage.
(e) Effective means shall be used to control
						the dust in manways, haulageways and other parts of the mine.
It is recommended that dust on haulageways be
						  controlled with water, treating with calcium chloride, or other equally
						  effective means.
In areas of water scarcity, it is recommended that
						  water for dust control be treated with a wetting agent to increase its
						  efficiency.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 31 - Air Quality, Radiation, and Ventilation › Underground › Section 7095 - (5-1). Dust, Smoke, and Gases After Primary Blasting

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) Except as provided in subsection (b) of
						this section, no primary blasting shall be done in a mine during the working
						shift, except where the ventilating currents are arranged so that dust, smoke,
						and gases from the blast go out of the mine without circulating through any
						active working place.
(b) Where it
						is necessary to do primary blasting during the working shift and the
						ventilating currents pass from the blast area through active mine workings, all
						employees shall be removed from such workings to the fresh air side of the
						blast area before the shots are fired.
(c) After a blast, employees shall not be
						required or permitted to return to their working places until the atmosphere of
						such places is reasonably free of smoke, dust, and gases from the
						blast.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 31 - Air Quality, Radiation, and Ventilation › Underground › Section 7096 - (5-1). Dust, Smoke, and Gases from Secondary Blasting

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) In order to protect employees from
						harmful dust, smoke, and gases from secondary blasting, such blasting shall not
						be done unnecessarily during the working shift.
(b) At permanent locations, such as
						bulldozing chambers, main grizzlies, draw points, and other control points
						where blasting is done throughout the working shift in the regular course of
						the work, employees shall be protected by one or more of the following, as
						necessary:
(1) A ventilation system that
						carries dust, smoke, and gases directly into the return air without circulation
						through any active working place.
(2) A system of water sprays that will
						blanket the area with a fine spray or mist during blasting, and long enough
						thereafter that the dust, smoke, and gases are allayed.
(3) Removal of employees from all areas of
						contamination until the atmosphere is reasonably free of dust, smoke, and
						gases.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 31 - Air Quality, Radiation, and Ventilation › Underground Mine Ventilation › Section 7098 - Ventilation

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) The operator of
						every mine shall cause a good and sufficient current of fresh air to be
						circulated through every working place in the mine.
(b) The quantity of fresh air circulated
						through each working place shall be at least 200 cubic feet per minute for each
						person.
(c) Where workings are of
						such size or shape that air does not circulate satisfactorily in the vicinity
						of the workers, auxiliary ventilation shall be used.
(d) If the quantity of fresh air required by
						subsection (b) of this section is not sufficient to prevent harmful
						accumulations of dust, fumes, vapors, or gases, enough additional fresh air
						shall be provided to remove and prevent such accumulations.
(e) Men shall not be permitted, except in
						extreme emergencies, to work in a place where the oxygen content of the air is
						less than 19 ½ percent by volume (dry basis).
(f) No man, unless he is wearing permissible,
						self-contained breathing apparatus, shall be permitted to work in a place where
						a flame safety lamp will not burn.
(g) (5-28) Unventilated areas shall be sealed
						or barricaded and posted against entry.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 31 - Air Quality, Radiation, and Ventilation › Underground Mine Ventilation › Section 7099 - Mechanical Ventilation

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) When the Division considers it necessary
						for the protection of employees, mechanically produced and positively
						controlled air currents shall be provided.
(b) For maximum accessibility and to isolate
						them from underground hazards, the main fan or fans shall be installed on the
						surface, unless permission in writing is secured from the Division for their
						underground installation.
Fans shall be so arranged that the mine entrances can
						  be used for rescue or other purposes.
(c) For the protection of employees, the main
						fan or fans shall be installed so that the ventilating current can be quickly
						reversed in direction.
(d)
						Auxiliary fans underground shall be located so as to provide the best air
						available to the working place. Recirculation of air by auxiliary fans shall be
						avoided as far as practical.
(e)
						(5-22) All surface fans, casings, and air ducts shall be constructed wholly of
						noncombustible materials.
(f) Every
						fan house and every building within 50 feet of a fan house shall be constructed
						wholly of noncombustible material, or shall be made fire resistant by the use
						of gunite, cement plaster, metal sheathing, or by other equally effective
						means.
(g) Compressed air that does
						not contain smoke, harmful gases, or excessive oil may be used for ventilating
						purposes.
(h) Where underground
						fans are operated by electricity, all combustible material in the immediate
						vicinity shall be removed or made fire resistant.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 32 - Gases in Mines › UNDERGROUND › Section 7102 - Dangerous Accumulation of Gases

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) When the air in any part of a mine is
						known to contain, or is suspected of containing, a dangerous accumulation of
						gas, it shall be tested before anyone is allowed to work therein.
(b) For the purpose of these Orders, a
						dangerous accumulation of gas is any gas, except flammable gas, in a
						concentration greater than listed in the General Industry Safety Orders as the
						maximum allowable concentration for such gas.
A dangerous accumulation of flammable gas is any
						  mixture of flammable gas and air which exceeds 20 percent of its lower
						  explosive limit.
(c) If an
						accumulation of gas is sufficient to endanger persons away from its immediate
						vicinity, such persons shall be promptly taken out of the danger area until the
						gas is removed.
(d) When it is
						necessary to move an accumulation of gas, provision shall be made for the
						safety of employees in the area through which the gas is to be moved.
						Accumulations of gas shall be moved under the direction of a competent
						person.
(e) No one shall be
						permitted to work or be in a dangerous accumulation of gas unless permissible
						respiratory equipment adequate for employee protection is worn.
1.
						  Change without regulatory effect amending subsections (d) and (e) and adding
						  NOTE filed 3-17-2011 pursuant to section
						  100, title 1, California Code of
						  Regulations (Register 2011, No. 11).
Note: Authority cited: Section
							 142.3, Labor
							 Code. Reference: Section
							 142.3, Labor
							 Code.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 32 - Gases in Mines › UNDERGROUND › Section 7103 - (21-1). Gassy Mine Classification

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) A mine shall be deemed gassy, and
						thereafter operated as a gassy mine, if:
(1)
						(21-1b) Flammable gas emanating from the orebody or the strata surrounding the
						orebody has been ignited in the mine; or
(2) (21-1c) A concentration of 0.25 percent
						or more, by air analysis, of flammable gas emanating only from the orebody or
						the strata surrounding the orebody has been detected not less than 12 inches
						from the back, face, or ribs in any open workings; or
(3) (21-1d) The mine is connected to a gassy
						mine; or
(4) (21-1a) The Division
						may designate any mine as gassy if history or past experience indicates that
						flammable gas in hazardous concentrations is likely to be encountered in such
						mine.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 32 - Gases in Mines › UNDERGROUND › Section 7104 - Tests for Gases

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a)
						Tests for flammable gases shall be made with a permissible methane detector or
						by chemical analysis.
NOTE: To be of most value in active mines, it is
						  necessary that the percent of gas present be quickly and accurately determined.
						  Because of the time required to collect and analyze air samples, and the
						  relative insensitivity of the flame safety lamp, it is strongly recommended
						  that a permissible methane detector be used for testing.
(b) Tests for any gas other than flammable
						gas shall be made by chemical analysis or by use of a testing device designed
						to detect the particular gas for which the test is being made, and to measure
						its concentration.
(c) When the air
						in any part of a mine is known to contain or is suspected of containing
						dangerous or explosive gas, it shall be tested by means acceptable to the
						Division of Industrial Safety before employees are allowed to work therein.
						These tests shall be made by an individual who has been certified by the
						Division to make them.
Every person requesting certification as a gas tester
						  shall submit a completed application form to the Division. Upon submission of
						  an application for certification as a gas tester, the Division shall collect
						  the amount of $15.00 for examination fee which is non-refundable. Renewal fees
						  are $5.00 annually.
NOTE: See Section
						  6967 (b) for Labor
						  Code excerpts.
1.
						  Repealer of subsection (c) and new subsection (c) filed 8-1-74; effective
						  thirtieth day thereafter (Register 74, No. 31).
2. Change without
						  regulatory effect amending subsection (c) and NOTE filed 3-17-2011 pursuant to
						  section 100, title 1, California Code of
						  Regulations (Register 2011, No. 11).
Note: Authority cited: Section
							 142.3, Labor
							 Code. Reference: Section
							 142.3, Labor
							 Code
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 32 - Gases in Mines › UNDERGROUND › Section 7105 - Mechanical and Electrical Equipment for Gassy Mines

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) Before installing mechanical equipment in
						a gassy mine, consideration shall be given to the use of power which will not
						be a source of ignition in a gaseous atmosphere.
Where practical, locomotives, material hoists, scraper
						  hoists, auxiliary fans, and other equipment in the mine should be driven by
						  compressed air.
(b) Before
						installing or using any electrical equipment in a gassy mine, the Division of
						Industrial Safety shall be advised of actual conditions. Such installations or
						operations shall be made according to specific orders to be issued by the
						Division for the particular location.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 32 - Gases in Mines › UNDERGROUND › Section 7106 - (21-2)-(21-100). Gassy Mine Operation

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
Gassy mines shall be operated in accordance with all
						  mandatory U.S. Bureau of Mines Health and Safety Standards for Metal and
						  Nonmetallic Underground Gassy Mines, published July 31, 1969, February 25,
						  1970, and December 8, 1970.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 35 - Mine Shafts › Section 7110 - Shaft Guarding

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a)
					 (19-100) Every shaft shall be guarded at the top and at every shaft
					 station.
(b) Guards for shafts
					 shall conform to the following standards;
(1)
					 The guards shall be substantially constructed, preferably, of solid materials,
					 to keep objects from falling into the shaft. If solid materials are not used,
					 openings in the guard shall not exceed one-half inch.
(2) The guards shall be securely fastened in
					 place and, except when necessarily opened, the gates shall be kept securely
					 closed.
(3) The guards and gates
					 shall be at least 42 inches high and shall fit as closely to the floor as
					 feasible.
(4) Any alternate means
					 of guarding which will afford at least equal protection to employees and is
					 acceptable to the division.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 35 - Mine Shafts › Section 7111 - Shaft Work, Maintenance, and Repair-General

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) (19-107) Before maintenance or repair
					 work is begun in a shaft, the person in charge of such work shall inform the
					 hoistman of the nature of the work to be done.
(b) (19-108) Signs marked "Men Working in
					 Shaft" shall be hung on the signal device in the hoist room and on or near the
					 hoist brake during the time men are at work in a shaft compartment. The sign
					 shall not be removed until the shaft men have notified the hoist operator that
					 they are in the clear.
(c) When men
					 are working in any compartment of a shaft, the shaft conveyance in any
					 adjoining compartment shall not be operated except in an emergency or as
					 directed by the shaft repair crew.
The hoisting conveyance of any adjoining compartment
						shall be spotted at the working place to prevent workers from falling into such
						compartment.
(d) All planks,
					 timbers, bulkheads, and other materials used in repair work shall be removed to
					 a safe place before regular hoisting operations are resumed.
They shall not be placed in a manway compartment in such
						manner as to impede safe and ready passage through the shaft.
(e) Wherever practical, maintenance work
					 shall be carried on from the hoisting conveyance used in the shaft.
(f) If maintenance work is carried on from
					 the top of the conveyance, a substantial platform or other safe footing
					 securely fastened to the conveyance shall be provided for the workers.
In vertical shafts, an auxiliary bonnet shall be secured
						to the hoisting rope as closely above such platform as is practical for the
						work being done.
(g) (15-5)
					 Unless protected by other means acceptable to the Division, approved safety
					 belts shall be provided employees while working:
(1) In or over shafts or winzes inclined more
					 than 45 degrees from the horizontal.
(2) In any portion of any shaft where,
					 because of slippery footing or other local conditions, a serious fall may
					 result.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 35 - Mine Shafts › Section 7112 - Shaft Work-Major Repair

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) To
					 prevent injury to men and keep materials from falling down the shaft while
					 extensive repair work is carried on, the following precautions shall be taken:
(1) A substantially constructed bulkhead
					 shall be secured in place in the compartment where the repair operations are
					 carried on, and as close below where the men are working as is
					 practical.
(2) (19-77) When the
					 shaft conveyance is lowered to the working place, it shall be stopped at least
					 15 feet above the working place and shall be held there until a further signal
					 is given by the repair crew.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 35 - Mine Shafts › Section 7113 - (19-110). Protection Against Falling Materials

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) When a bucket or skip is used for
					 hoisting while sinking a new shaft or deepening a shaft already in operation,
					 workers in the shaft shall be protected against falling rocks and materials by
					 one or both of the following means:
(1) Trap
					 doors shall be installed at the shaft collar over openings in pentices and
					 bulkheads, and under dumping points in the shaft for buckets and skips. Such
					 trap doors shall be substantially constructed and so arranged that they can be
					 readily and easily opened and closed.
It is recommended that trap doors at the collar be
						operated by compressed air and that the controls be located convenient to the
						hoistman.
(2) Some other
					 equally effective means acceptable to the Division.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 35 - Mine Shafts › Section 7114 - (19-110). Deepening an Operating Shaft

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) No hoisting or other work shall be
					 permitted in the upper part of the shaft while men are in the lower part,
					 unless the men are protected by one or more of the following means:
(1) By leaving a rock pentice at the bottom
					 of the shaft that is to be deepened. The depth of such pentice shall be not
					 less than one and one-half times the least dimension of the shaft.
(2) By installing a substantial bulkhead at
					 the bottom of the shaft to be deepened.
Such bulkhead shall consist of not less than 2 layers of
						heavy timbers placed with the layers at right angles to each other, and shall
						be covered with loose rock to a depth of not less than 15
						feet.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 35 - Mine Shafts › Section 7115 - Special Power-Driven Shaft Equipment

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
Before special power-driven mechanical equipment is used
						in a shaft for sinking or enlarging operations, the mine operator shall notify
						the Division in writing of the provisions made for the safety of
						employees.
If considered necessary by the Division, additional
						safeguards shall be provided.
This section applies to shaft boring machines, shaft
						drill jumbos, shaft mucking devices, prime movers, and other mechanical
						appurtenances used in connection with the operation of such
						equipment.
California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 35 - Mine Shafts › Section 7116 - Hoisting While Sinking or Enlarging Shaft

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) In order to protect men working below the
					 shaft conveyance, only first-class hoists shall be used to hoist or lower men
					 or materials through any shaft or winze which is being deepened or enlarged.
This is not intended to prohibit the material hoist from
						auxiliary use, such as lifting equipment from the hoist conveyance, raising
						timbers into place, and similar work, when such use is confined to the
						immediate area of the working place. When a material hoist is used, no one
						shall be permitted under the suspended load.
(b) (19-77) When the shaft conveyance is
					 lowered to the working place, it shall be stopped at least 15 feet above the
					 working place and shall be held there until a further signal is given by the
					 shaft workers.