Loading (50 kb)...'
(continued)
"Springing." The creation of a pocket at the bottom of a bore hole by the use of a moderate quantity of explosives.
"Squib-Electric." A firing device that burns with a flash.
"Static Dissipating." Sufficiently conductive to dissipate charges of static electricity but possessing enough electrical resistance to be nonconductive to ordinary stray electrical currents. The electrical characteristics shall be uniform and for hose or tubes shall have a resistance of not less than 5,000 ohms per foot nor more than 30,000 ohms per foot and not more than 2 megohms over its entire length.
"Stemming Material." Inert material placed in a borehole after the explosive. Used for the purpose of confining explosive materials or to separate charges of explosive materials in the same borehole.
"Trackless Vehicle." A type of vehicle that does not run on rails.
"Train." A car or cars moved by mechanical or other power.
"Underground." Work locations in mines, tunnels or similar subterranean excavations.
"USDOT." United States Department of Transportation.
"Water Gels." An explosive material containing substantial portions of water, oxidizers, and fuel, plus a cross-linking agent.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3 Labor Code.
s 5238. Competency and Qualifications of Blasters.
(a) An employer shall not permit a blasting operation, unless a blaster having a current, valid California "Blaster's License" issued by the Division is physically present on the site to accomplish the blasting operation and/or direct and supervise others in such operation.
(b) The employer shall ensure that the physical condition of the licensed blaster will not interfere with his or her ability to safely conduct blasting operations.
(c) A licensed blaster shall be able to understand and give written and oral orders. NOTE:Other persons may work under the direct supervision of a licensed blaster for the purpose of obtaining the necessary experience to qualify for a California Blaster's License.
(d) The employer shall require that the licensed blaster:
(1) furnish satisfactory evidence of competency in the use and handling of explosive materials, and
(2) have the necessary qualifications to safely perform the type of blasting operations required for the specific worksite.
(e) The licensed blaster shall show proof of a valid Blaster's License when requested by a representative of the Division or other authority having jurisdiction.
(f) The applicant for a blaster's license shall meet the following minimum qualifications:
(1) Shall be at least 21 years of age;
(2) Shall have at least three years experience in the blasting category being applied for; and,
(3) Meet the requirements of subsections (b) and (c) of this Section.
Note: Authority cited: Section 142.3, Labor Code. Reference: Sections 142.3 and 6710, Labor Code; and Section 12006, Health and Safety Code.
s 5239. Training and Trainees.
All persons who handle or transport explosive materials shall be trained in the hazards of the job and safe performance of their duties. Trainees conducting blasting operations shall be under the direct supervision of a licensed blaster.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
s 5240. Disposal of Explosive Materials.
(a) Deteriorated, damaged, frozen, contaminated, or scrap explosive materials which are unfit for use, shall be desensitized, destroyed or otherwise made safe in a safe place by a competent person(s).
EXPLOSIVE MATERIALS SHALL NEVER BE BURIED OR COVERED OVER BY ANY MATERIALS AS A MEANS OF DISPOSAL.
(b) Sites for destruction of explosive materials shall be located away from inhabited buildings, public highways, passenger railways, operating buildings and all other explosives. The separation shall not be less than the inhabited building distance as contained in Table Ex. 1. When possible, barricades shall be utilized between the site and inhabited buildings.
(c) A shelter or other adequate protection shall be provided near the disposal area for emergency use.
(d) A warning device shall be used when explosive materials are being destroyed.
(e) Waste static sensitive explosive materials shall be handled, transported or otherwise protected against the hazards of static electricity.
(f) Incompatible waste explosive materials shall not be transported in the same container or vehicle.
(g) Provisions shall be made so scrap explosive materials will not be placed in any burn location until at least 48 hours has past since the last fire has gone out.
(h) Bags that have contained ammonium nitrate shall not be piled, even temporarily, in or near a wooden building, as such bags are flammable. Bags shall be destroyed after emptying.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
s 5241. Explosives for Blasting.
(a) Chlorate high explosives shall not be used for blasting operations.
(b) Low-Freezing explosives shall be of a type that will not freeze at temperatures that may reasonably be expected.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
s 5242. Water Gels.
(a) Cap sensitive water gels and those containing an explosive shall be classified as high explosive and manufactured, transported, stored, and used as specified for explosives in this Article.
(b) Water gels containing no substance in itself classified as an explosive and which are not cap-sensitive as defined in Section 5237 under "Blasting agents" shall be classified as blasting agents and manufactured, transported, stored, and used as specified for blasting agents in this Article and Article 120.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
s 5243. Black Powder Blasting.
(a) The use of Black Powder for blasting is not recommended. However, if it is used, the following rules shall be complied with:
(1) Inexperienced persons shall be closely supervised by a competent person.
(2) The licensed blaster and helper(s) shall not carry matches or other sources of ignition except when lighting fuse.
(3) The blasting crew shall wear shoes with no exposed metal.
(4) All persons not connected with the loading operations shall be kept at least 500 feet away and the area shall be roped off if necessary.
(5) Fires are prohibited within 500 feet of any black powder taken from the magazine for blasting purposes.
(6) Holes shall not be loaded while compressors, shovels, trucks, tractors, or sources of ignition are within 100 feet.
(7) Only bagged powder shall be used. It shall not be brought from the magazine until after the holes are sprung and have been cooled.
(8) Black powder shall not be used underground or for construction blasting.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
s 5244. Explosives for Underground Use.
(a) Tests made to determine the fume class as shown in the following table shall be made according to the standard for "toxic gas test" procedure of the Mine Safety and Health Administration (MSHA):
Cubic Feet of Toxic Gases Per (1-1/4"X 8") Cartridge of Explosive Material
Fume Class 1 - Less than 0.16 Fume Class 2 - From 0.16 to 0.33 Fume Class 3 - From 0.33 to 0.67
(b) Except as provided for in subsections (c) and (d), main explosive charge used underground shall comply with the requirements for Fume Class 1.
(c) Where the concentration of combustible dust and vapor is found to exceed 10% of the lower flammable limit, loading and blasting operations with Fume Class 1 explosive materials shall be halted.
(d) When there is reason to believe that use of Fume Class 1 explosive materials may endanger employees by igniting combustible dusts or gases, permissible explosive materials shall be used and the ventilation increased to compensate for the resulting increase of poisonous and toxic gases. Note:The composition of permissible explosives is such that they are less likely to ignite combustible dusts and gases than explosive materials which comply with Fume Class 1. On the other hand, the volume of poisonous and toxic gases produced by some permissible explosive materials is several times greater than that generated by Fume Class 1 explosive materials.
(e) Fume Class 1 explosives will not be required for the final loading of a coyote hole when the coyote hole is sufficiently back-filled to become a primary blast.
(f) Only plant mixed blasting agents where composition control is assured shall be used underground.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
s 5245. Blasting Operations During Lightning and Dust Storms.
(a) Upon the approach of a lightning or dust storm, blasting operations shall be stopped and all persons in the blast area withdrawn to a safe location.
(b) Provisions shall be made for warning crews when an electric or dust storm approaches.
(c) In underground operations using electrical blasting systems, instrumentation to determine the presence of a lightning and dust storm within 15 miles of the portal and means to signal the heading shall be provided.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
s 5246. Smoking and Open Flames.
Smoking and open flames are prohibited within 50 feet of explosive materials in the open, unless otherwise stated in these orders.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
s 5247. Miscellaneous Provisions.
(a) No person shall store, handle, or transport explosive materials except under a valid permit issued by the applicable Federal, State or Local Agency.
(b) No employee shall be permitted to handle or use explosive materials while under the influence of alcohol, narcotics, or other drugs that cause drowsiness or other side effects which could cause the employee to perform duties/functions in an unsafe manner.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
s 5248. Blasting Accident Reports and Procedures.
(a) In the event of a blasting accident or unusual occurrence affecting the safety of employees in which explosive materials are involved, whether or not personal injury is sustained, the employer shall within 24 hours forward a report of the incident to the Division.
(b) The report shall state:
(1) The names and license numbers of all blasters involved.
(2) The names and occupations of any employees injured.
(3) The type of explosive materials, detonator, and method or methods of detonation of explosive materials.
(4) A factual account of events pertinent to the accident.
(c) In any blasting incident in which serious personal injury is sustained, there shall be no continuation of the blasting operation involved until such time as the Division has completed its investigation or authorized resumption of work.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
s 5251. Storage of Explosive Materials.
(a) All explosive materials as defined in these orders, including industrial high explosives and any newly developed and unclassified explosives, shall be stored in the appropriate magazine as shown in Table EX-3. Magazines shall be constructed in conformity with the provisions of this Article.
(b) The following materials/devices shall be kept in their shipping containers until used:
(1) Explosive materials such as explosive power packs in the form of explosive cartridges or explosive-charged construction devices, explosive rivets, explosive bolts, explosive charges for driving pins or studs.
(2) Cartridges for explosives actuated power devices when in quantities of less than 50 pounds net weight of explosives.
(3) Stocks of small arms ammunition, propellant-actuated power cartridges, small arms ammunition primers in quantities of less than 750,000, and smokeless propellant in quantities of less than 750 pounds.
(4) Fuse lighters and fuse igniters.
(5) Safety fuses.
(c) Detonating cord shall not be kept or stored with blasting caps, but may be stored with other explosives.
(d) All magazines shall be located or protected as to minimize accidental impact from vehicles or falling objects.
(e) Area surrounding magazines shall be kept clear of brush, dried grass, leaves, and other combustible materials for a distance of 50 feet.
(1) Magazine contents shall be protected from flooding. The ground around magazines shall slope away from the magazine or drainage shall be provided.
(f) Electric power lines shall be kept at least 5 feet away from the exterior of any underground magazine except underground service.
(g) Magazines shall be located at least 25 feet from low-voltage electrical lines and 100 feet from high-voltage electrical lines. Care should be taken that they be placed in such a manner that should a line break, it would not fall within this distance except for underground service.
(h) Quantity and Storage Restrictions.
(1) Explosive materials in excess of 300,000 pounds or detonators in excess of 20 million shall not be stored in one magazine.
(2) Detonators shall not be kept or stored in any magazine with other explosive materials, except under any of the following conditions:
(A) In a Type 4 magazine, detonators that will not mass detonate may be stored with electric squibs, safety fuse, igniters, and igniter cord.
(B) In a Type 1 or Type 2 magazine, detonators may be stored with delay devices and any of the items listed in subsection (h)(2)(A) of this Section.
(C) When approved by the Division.
(3) No more than 50 pounds of high explosives shall be stored in an indoor magazine.
(i) Type 3 magazines "Day Box" shall not be used for storage of more than 110 pounds of explosive materials.
(j) All magazines shall be kept closed and locked, except when contents are being removed or replaced. Keys or combinations shall be kept in a safe place. Only persons authorized by the employer or licensed blaster shall be permitted to unlock or remove supplies from a magazine.
(k) Fuse caps with attached safety fuses shall not be stored in an explosives magazine, but may be stored in a magazine with other detonators.
(l) Vehicular storage facilities for Types 2, 4 and 5 magazines shall have wheels removed or shall be immobilized by kingpin locking devices.
(m) Explosive materials shall not be left unattended in Type 3 magazines. The explosive materials shall be removed to a Type 1 or 2 magazine for storage.
(n) A running inventory shall be maintained for the magazine to indicate the quantity of explosive materials in storage, quantity removed, date of removal and the name of the person responsible for transfer/removal of the explosive materials.
Exception: A Type 3 magazine (day box).
(o) Magazines shall not be located within 300 feet of the entrance (portal) of an active tunnel or mine.
(p) Signs shall be posted on the premises where magazines are located with the words "EXPLOSIVES - KEEP OFF" legibly printed thereon in letters not less than 3 inches high with a 1/2 inch stroke. Such signs shall be within 100 feet of the magazine and so placed that a bullet through the sign will not strike the magazine.
(q) Metal magazines shall be equipped with electrical bonding connections between all conductive portions so the entire structure is at the same electrical potential. Suitable electrical grounding methods include welding, riveting, or the use of securely tightened bolts where individual metal portions are joined. Conductive portions of non-metal magazines shall be grounded.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code; and Section 12006, Health and Safety Code.
s 5252. Quantity and Distances Table for the Storage of Explosive Materials.
(a) The quantity of explosive materials that may be kept or stored in any magazine shall conform to Table EX-1, Table of Distances, which sets forth the minimum distance that a magazine may be located from the nearest inhabited building or other magazine.
(b) The quantity and distance table is not applicable to any magazine if the nearest inhabited building is effectually screened from the magazine by a natural barrier, which:
(1) Is 40 feet or more in height at any point, above a straight line drawn from the top of any sidewall of the magazine to any part of the inhabited building; and
(2) Has a natural thickness of not less than 200 feet at the point where it is intersected by the straight line.
(c) All types of blasting caps in strength through No. 8 shall be rated at 1 1/2 pounds of explosives per 1,000 caps. For strengths higher than No. 8 cap, consult the manufacturer.
(d) For quantity and distance purposes detonating cord up to 60 grains per foot shall be calculated as equivalent to 9 pounds of high explosives per 1,000 feet. Heavier detonating cord shall be rated proportion- ately.
(e) When two or more storage magazines are located on the same property, each magazine must comply with the minimum distances specified from inhabited buildings, railways, and highways; and, in addition, they shall be separated from each other by not less than the distances shown for "Separation of Magazines," except that the quantity of explosive materials contained in cap magazines shall govern in regard to the spacing of said cap magazines from magazines containing other explosive materials. If any two or more magazines are separated from each other by less than the specified "Separation of Magazines" distances, then such two or more magazines, as a group, must be considered as one magazine, and the total quantity of explosive materials stored in such group must be treated as if stored in a single magazine located on the side of any magazine of the group, and must comply with the minimum of distances specified from other magazines and inhabited buildings.
TABLE EX-1 AMERICAN TABLE OF DISTANCES FOR STORAGE OF EXPLOSIVES MATERIALS As
Revised and Approved by the Institute of Makers of Explosives -June 1991
TABLE EX-2 Table of Separation Distances of Ammonium Nitrate and Blasting
Agents from Explosives or Blasting Agents [FN1]
_______________________________________________________________________________
Donor Weight Minimum Separation Distance
of Acceptor when Barricaded (ft.) Minimum
Thickness of
Pounds Pounds Ammonium Artificial
Barricades
Over Not Over Nitrate Blasting Agent (in.)
_______________________________________________________________________________
100 3 11 12
100 300 4 14 12
300 600 5 18 12
600 1,000 6 22 12
1,000 1,600 7 25 12
_______________________________________________________________________________
1,600 2,000 8 29 12
2,000 3,000 9 32 15
3,000 4,000 10 36 15
4,000 6,000 11 40 15
6,000 8,000 12 43 20
_______________________________________________________________________________
8,000 10,000 13 47 20
10,000 12,000 14 50 20
12,000 16,000 15 54 25
16,000 20,000 16 58 25
20,000 25,000 18 65 25
_______________________________________________________________________________
25,000 30,000 19 68 30
30,000 35,000 20 72 30
35,000 40,000 21 76 30
40,000 45,000 22 79 35
45,000 50,000 23 83 35
_______________________________________________________________________________
50,000 55,000 24 86 35
55,000 60,000 25 90 35
60,000 70,000 26 94 40
70,000 80,000 28 101 40
80,000 90,000 30 108 40
_______________________________________________________________________________
90,000 100,000 32 115 40
100,000 120,000 34 122 50
120,000 140,000 37 133 50
140,000 160,000 40 144 50
160,000 180,000 44 158 50
_______________________________________________________________________________
180,000 200,000 48 173 50
200,000 220,000 52 187 60
220,000 250,000 56 202 60
250,000#i275,000 60 216 60
275,000 300,000 64 230 60
_______________________________________________________________________________
NOTES:
(1) Separation distances to prevent explosion of ammonium nitrate and ammonium nitrate-based blasting agents by propagation from nearby stores of high explosives or blasting agents referred to in the Table as the "donor". Ammonium nitrate, by itself, is not considered to be a donor when applying this Table. Ammonium nitrate, ammonium nitrate-fuel oil or combinations thereof are acceptors. If stores of ammonium nitrate are located within the sympathetic detonation distances of explosives or blasting agents, one-half the mass of the ammonium nitrate should be included in the mass of the donor.
(2) The distances in the Table apply to ammonium nitrate that passes the insensitivity test prescribed in the definition of ammonium nitrate fertilizer promulgated by The Fertilizer Institute, and ammonium nitrate failing to pass said test shall be stored at separation distances determined by competent persons.
TABLE EX-3 Types of Storage Facilities
As a result of tests with electric blasting caps, it has been determined that these blasting caps are not subject to sympathetic detonation. Therefore, a Type 4 storage facility meets the necessary requirements for storage of blasting caps that do not mass detonate.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code; and Section 12006, Health and Safety Code.
s 5252.1. Quantity and Distance Table for Storage of Explosives-Low Explosives Distances in Feet When Storage Is Unbarricaded.
(a) These explosives normally will be confined to pressure ruptures of containers and will not produce propagating shock waves or damaging blast over pressure beyond the magazine distance specified for this class. These distances are unbarricaded.
Above Ground
Magazine
Railways Separation
Pounds Pounds Inhabited and Intraline
Over Not Over Buildings Highways Separation
0 1,000 75 75 50
1,000 5,000 115 115 75
5,000 10,000 150 150 100
10,000 20,000 190 190 125
20,000 30,000 215 215 145
30,000 40,000 235 235 155
40,000 50,000 250 250 165
50,000 60,000 260 260 175
60,000 70,000 270 270 185
70,000 80,000 280 280 190
80,000 90,000 295 295 195
90,000 100,000 300 300 200
100,000 200,000 375 375 250
200,000 300,000 450 450 300
(b) Distances are not to be reduced by the presence of barricades or earth cover.
Note: Authority cited: Sections 142.3 and 7997, Labor Code. Reference: Sections 142.3 and 7997, Labor Code.
s 5253. Quantity and Distance Table for Storage of Ammonium Nitrate and Blasting Agents.
(a) The quantity of ammonium nitrate or ammonium nitrate based blasting agents that may be stored in any magazine shall conform to Table EX-2, Table of Separation Distances, in Section 5252 which sets forth the minimum separation distances for ammonium nitrate and blasting agents from stores of high explosives or blasting agents. These distances apply to the separation of stores only. The American Table of Distances (See Table EX-1 in Section 5252) shall be used in determining separation distances from inhabited buildings.
(b) When the ammonium nitrate and/or blasting agent is not barricaded the distances shown in Table EX-2 in Section 5252 shall be multiplied by six. These distances allow for the possibility of high velocity metal fragments from mixers, hoppers, truck bodies, sheet metal structures, metal containers, and the like which may enclose the "donor." Where storage is in bullet-resistant magazines recommended for explosives or where the storage is protected by a bullet-resistant wall, distances and barricade thicknesses in excess of those prescribed in Table EX-1 in Section 5252 and are not required. (See Section 5253.1 for bullet-resistant construction.)
(c) Earth, or sand dikes, or enclosures filled with the prescribed minimum thickness of earth or sand are acceptable artificial barricades. Natural barricades, such as hills or timber of sufficient density that the surrounding exposures which require protection cannot be seen from the "donor" when the trees are bare of leaves, are also acceptable.
(d) When the ammonium nitrate must be counted in determining the distances to be maintained from inhabited buildings, it shall be counted at l/2 its actual weight because its blast effect is lower. Note:Ammonium nitrate by itself is relatively insensitive and is widely used through the State as an agricultural fertilizer. When used for blasting purposes, it is customary to sensitize the ammonium nitrate by mixing it with carbonaceous materials such as coal dust, lamp black, carbon black, wood pulp, diesel fuel, stove oil, or other materials containing carbon. When mixed with carbonaceous materials, ammonium nitrate becomes much more sensitive to fire, friction, and shock, so it takes on characteristics resembling those of dynamite. For this reason, a mixture of ammonium nitrate and carbonaceous material must be stored in compliance with regulations governing storage of explosives. Burning ammonium nitrate produces oxides of nitrogen which are very dangerous to breathe.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3 Labor Code.
s 5253.1. Construction and Use of Magazines.
(a) Type 1 Magazines.
(1) A Type 1 magazine shall be a permanent structure; a building, igloo, tunnel, or dugout. It shall be bullet, theft, fire and weather resistant, and be well ventilated.
(A) A Type 1 magazine shall be built at least equivalent to one of the following methods:
1. 8 inch masonry.
2. Metal of at least 14 gauge.
3. Wood frame with at least 26-gauge metal covering. No wood shall be exposed on the exterior.
(B) A Type 1 magazine shall meet the following additional requirements.
1. Masonry in subsection (a)(1)(A)1. shall have any openings in tile or cement blocks filled with a coarse, dry sand or a wet mixture of 1 part cement and 10 parts dry sand.
2. Metal in subsections (a)(1)(A)2. and 3. above shall be lined inside with not less than 4 inches of brick, solid cement blocks, hardwood, or equivalent.
(C) Solid wood or plywood floors are required. Floors shall be strong enough to bear the weight of the maximum quantity to be stored.
(D) Magazines shall have no openings except for ventilation and entrances. Vent openings shall be screened to prevent sparks passing through them.
(E) Magazine roofs shall be constructed of at least 7/8-inch sheathing covered with not less than 26-gauge iron or aluminum. Where it is possible for a bullet to be fired directly through the roof and into the magazine at such an angle that the bullet would strike the explosives within, the magazine is to be protected by one of the following methods:
1. A sand tray lined with a layer of building paper, plastic or other nonporous material, and filled with not less than four inches of coarse, dry sand, and located at the tops of inner walls covering the entire ceiling area, except the portion necessary for ventilation, or
2. A fabricated metal roof constructed of 3/16 inch plate steel lined with four inches of hardwood. (For each additional 1/16 inch of plate steel, the hardwood lining may be decreased one inch.)
(F) Magazine doors shall be kept closed and locked, except when opened for transacting business. The magazine doors shall be constructed of at least 1/4 inch plate steel on the outside and lined with at least two inches of hardwood on the inside.
(G) Each door shall be equipped with:
1. Two mortise locks; or
2. Two padlocks fastened in separate hasps and staples; or
3. A combination of a mortise lock and padlock; or
4. A mortise lock that requires two keys to open; or
5. A three-point lock.
6. If padlocks are used, they shall have at least five tumblers and a case-hardened shackle of at least 3/8 inch diameter. Padlocks shall be protected with not less than 1/4 inch steel hoods constructed so as to prevent sawing or lever action on the locks, hasps, and staples.
Exception: The lock requirement does not apply to magazine doors that are adequately secured on the inside by means of a bolt, lock, or bar that cannot be actuated from the outside.
(b) Type 2 Magazines.
(1) A Type 2 magazine shall be a portable box, trailer, semitrailer, or other mobile facility. It shall be bullet, theft, fire, and weather resistant, and shall be well ventilated. It shall be supported to prevent direct contact with the ground and, if less than one cubic yard in size, shall be securely fastened to a fixed object.
(A) The exterior construction and doors shall be constructed of not less than 1/4 inch steel and lined with at least two inches of hardwood. Magazines with top openings shall have lids with water-resistant seals or, lids that overlap the sides by at least one inch when in the closed position.
(B) Hinges and hasps shall be attached to doors by welding, riveting, or bolting (nut on inside of door). Hinges and hasps shall be installed so that they cannot be removed when the doors are closed and locked.
(C) Doors shall be equipped with locks as required by Section 5253.1(a)(1)(G).
(D) Type 2 magazines shall be located in conformity with Table EX-1, Distances for the Storage of Explosives, but may be permitted in warehouses and in wholesale and retail establishments when located on a floor which has an exit outside at grade level and the magazine is located not more than 10 feet from such an exit. Two Type 2 magazines may be located in the same building when one is used only for blasting caps in quantities not in excess of 5,000 caps and a distance of 10 feet is maintained between magazines.
(E) Indoor magazines shall be painted "red" and shall bear lettering in "white" on sides and top at least 3 inches high with a 1/2 inch stroke which reads, EXPLOSIVES -KEEP FIRE AWAY".
Exception: When size of the indoor magazine does not permit, letterings shall be as large as possible.
(c) Type 3 Magazines.
(1) A Type 3 magazine is a "Day Box" or other portable magazine. It shall be fire, theft and weather resistant. A Type 3 magazine shall be constructed of not less than number 12 gauge steel lined with a minimum of either 1/2 inch plywood or 1/2 inch Masonite-type hardboard.
(A) The door or lid shall overlap the opening by at least one inch. Hinges and hasps shall be attached by welding, riveting or bolting (nuts on inside of door).
(B) At least one steel padlock shall be provided (which need not be protected by a steel hood) having at least five tumblers and a case-hardened shackle of at least 3/8 inch diameter.
(2) When used for temporary storage at a site for blasting operations, Type 3 magazines shall be located away from inhabited buildings, and other magazines. A distance of at least 150 feet shall be maintained between Type 3 magazines and the other work in progress.
(d) Type 4 Magazines.
(1) A Type 4 magazine shall be a building, igloo, tunnel, dugout, box, trailer, semi-trailer, or other mobile magazine. It shall be fire, theft and weather resistant.
(A) A Type 4 magazine shall be constructed of masonry, metal-covered wood, fabricated metal, or a combination of these materials. The foundation shall be constructed of brick, concrete, cement block, stone, or metal or wood posts. If piers or posts are used in lieu of a continuous foundation, the space under the building shall be enclosed with fire-resistant material. The walls and floor shall be constructed of, or covered with nonsparking material or lattice work.
(B) The doors shall be metal or solid wood covered with metal. Hinges and hasps shall be attached by welding, riveting or bolting (nuts on inside of the door). Hinges and hasps shall be installed so that they cannot be removed when the doors are closed and locked.
(C) Locks shall meet the requirements of Section 5253.1(a)(1)(G).
(e) Type 5 Magazines.
(1) A Type 5 magazine shall be a building, igloo, tunnel, dugout, box, trailer, semi-trailer, or other mobile magazine. It shall be theft and weather resistant.
(A) The doors shall be metal or solid wood covered with metal. Hinges and hasps shall be attached by welding, riveting or bolting (nuts on inside of the door). Hinges and hasps shall be installed so that they cannot be removed when the doors are closed and locked.
(B) Locks shall meet the requirements of Section 5253.1(a)(1)(G).
(f) Magazines shall be ventilated to minimize dampness and heating of stored explosives. ventilation openings shall be screened with 14 mesh, 21-gauge wire to prevent the entrance sparks and rodents, and shall be protected in a manner that will maintain the bullet resistance of the magazine. NOTE:The recommendation for ventilation as contained in Safety Library Publication No. 1, Institute of Makers of Explosives, 1993 Edition, is evidence of good practice.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
s 5254. Magazine Heating.
(a) When heating systems are installed they shall be either hot water radiant heating within the magazine building; or air directed into the magazine building over either hot water or low pressure steam (15 psig) coils located outside the magazine building.
The magazine heating systems shall meet the following requirements:
(1) The radiant heating coils within the building shall be installed in such a manner that the explosive materials or their containers cannot contact the coils and air is free to circulate between the coils and the explosive materials or their containers.
(2) The heating ducts shall be installed in such a manner that the hot air discharge from the duct is not directed against the explosive materials or their containers.
(3) The heating device used in connection with the magazine shall have controls which prevent the ambient building temperature from exceeding 130 ° F.
(4) The electric fan or pump used in the heating system for a magazine shall be mounted outside and separate from the wall of the magazine and shall be grounded.
(5) The electric fan motor and the controls for electrical heating devices used in heating water or steam shall have overloads and disconnects which comply with the Electrical Safety Orders. All electrical switch gear shall be located a minimum distance of 25 feet from the magazine.
(6) The heating source for water or steam shall be separated from the magazine by a distance of not less than 25 feet when electrical and 50 feet when fuel fired. The area between the heating unit and the magazine shall be cleared of all combustible materials.
(7) The storage of explosive materials and their containers in the magazine shall allow uniform air circulation so temperature uniformity can be maintained throughout the explosive materials.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3 Labor Code.
s 5255. Second-Class Magazines.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3 Labor Code.
s 5256. Storage Within Magazines.
(a) Magazines shall be kept clean and free from rubbish. They shall not be used as storerooms for anything except explosive materials and transfer conveyors or other magazine tools while explosive materials are stored therein.
Sweepings from floors of magazines shall be properly disposed of. Magazine floors stained by leakage from explosive materials shall be cleaned according to instructions by the explosives manufacturer.
(b) Smoking, matches, open flames, spark producing devices and unauthorized fire arms shall be prohibited inside of or within 50 feet of magazines. Combustible materials shall not be stored within 50 feet of magazines.
(c) Fixed electric wiring in a magazine shall be equivalent to the requirements of Class II, Division 1, Hazardous Location, Electrical Safety Orders or may be more restrictive upon classification materials. The electric switch must be located outside of the magazine.
(d) When portable lights are necessary inside the magazine, permissible flash lights or permissible lanterns shall be used.
(e) Corresponding grades and brands of explosive materials shall be stored together in such a manner that brands and grade marks show. All stocks shall be stored so as to be easily counted and checked. Packages shall be piled in a stable manner and laid flat with top side up. Black powder, when stored in magazines with other explosive materials, shall be segregated by a sandbag barricade not less than 2 bags thick.
(f) When explosive materials are removed from a magazine, the oldest explosive materials of that kind in the magazine shall be taken and used first.
(g) Containers of bulk explosives shall not be unpacked or repacked in a magazine nor within 50 feet of a magazine or in close proximity to other explosive materials, except for manufacturing processes. Opened containers of bulk explosives shall be securely closed before being returned to a magazine.
(h) When magazines need inside repairs, all explosive materials shall be removed therefrom and the floors cleaned before work is started. In making outside repairs, if there is a possibility of causing sparks or fire, the explosive materials shall first be removed from the magazine.
(i) Explosive materials removed from a magazine under repair shall either be placed in another magazine or placed a safe distance from the magazine where they shall be properly guarded and protected until repairs have been completed and the explosive materials returned to the magazine.
(j) Every magazine used for the storage of explosive materials shall be under the supervision of a competent person who shall be not less than 21 years of age.
(k) Explosive materials shall not be piled/stored against interior walls so as not to interfere with ventilation.
(l) If buffer material is used to isolate the explosive material from the masonry walls, brick-lined or sand filled metal walls and single-thickness walls, it shall be so placed/ positioned as to not interfere with the ventilation provisions of the side and walls.
(m) Ammonium nitrate fuel oil (ANFO) blasting agent shall be physically separated from other explosives stored in the same magazine and in such a manner that oil does not contaminate other explosives.
(n) Magazine interiors shall be of a smooth finish without cracks or crevices with all nails, screws, bolts and nuts countersunk. Exposed metal or materials capable of emitting sparks shall be covered so as not to come in contact with packages of explosive materials.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
s 5257. Makeup or Primer House for Underground Blasting Operations.
(a) When 30 or more primers are required for a single round/shot, the primers shall be made up in advance in a makeup or primer house.
(b) When primers are made up and stored in quantities greater than for immediate need, they must be processed in a separate structure that complies with the Type 1 or Type 2 magazine requirements except as follows:
(1) Electricity for lights will be permitted if the electric wiring is at least 5 feet from explosive materials and complies with Class II, Division I, Hazardous Locations, Electrical Safety Orders.
(2) Not more than 110 pounds of explosive materials other than primers shall be stored in this makeup house.
(3) The number of made-up primers of each delay stored in this makeup house shall not exceed a normal 2-day supply.
(4) Heaters, if installed, shall comply with Section 5254(a).
(c) Makeup or primer houses shall be located no closer than 100 feet from any magazine or inhabited building.
(d) Primers not made up in a makeup or primer house shall be made up at the blasting site. NOTE:This Section does not prohibit primers being made up in a separate building or area, provided that explosives, detonators, and primers are stored in proper magazines.
Note: Authority cited: Section 142. 3, Labor Code. Reference: Section 142.3, Labor Code.
s 5258. Storage of Explosive Materials Underground.
(a) Explosive materials stored underground shall be so located that should they detonate or burn, the escape route for the employees will not be obstructed.
(b) Magazines shall be at least 200 feet from active underground workings, 50 feet from other magazines and at least 25 feet of solid ground separation from any haulageway used for any purpose other than the transportation of explosive materials. Any timbers within 25 feet of any magazine shall be made fire resistant.
(c) Explosive materials shall not be stored in an underground work area during tunneling and construction operations.
(d) In magazines where explosive materials may become damp, electricity may be installed for drying purposes. Electrical equipment used shall comply with Class II, Division I, Hazardous Locations, Electrical Safety Orders. Electrical wiring shall be kept at least 5 feet from explosive materials. No other electrical wiring shall be permitted within 5 feet of any magazine.
(e) Underground storage magazines shall be conspicuously marked with the words, "EXPLOSIVES," in redletters at least 4 inches high and with 5/8-inch stroke on a whitebackground.
(f) Combustible rubbish shall not be permitted within 100 feet of any underground magazine.
(g) Detonator storage magazines shall be of the same construction as explosives storage magazines and shall be separated by at least 50 feet from other magazines.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
s 5262. General.
(a) This Article shall apply to motorized vehicles, the operations of which are not under the jurisdiction of the USDOT, the California Highway Patrol, or the California Vehicle Code, or the Health and Safety Code on Public Highways.
(b) Electric detonators or similar primary explosive materials initiation devices shall not be transported on/in any vehicle equipped with a radio transmitter or other device which may cause detonation unless kept in their original shipping containers.
(c) Transportation of detonators and explosive materials together shall be in accordance with the Institute of Makers of Explosives, Safety Library Publication No. 22, Recommendations for the Safe Transportation of Detonators in a Vehicle with Certain Other Explosive Materials, May 1993, pages 1-16, which is hereby incorporated by reference.
(d) Any vehicle transporting explosive materials or oxidizing materials shall be placarded in accordance with the regulations of the USDOT. Explosive materials being transported on-site during or incidental to the manufacturing process shall be marked when deemed appropriate by the manufacturer.
(e) Original shipping containers or Type 3 magazines (day box) shall be used for taking detonators and other explosive materials from storage magazines to the blasting area.
(f)(1) Vehicles used for transporting explosive materials shall be strong enough to carry the load without difficulty and be in good mechanical condition. If vehicles do not have a closed body, the body shall be covered with a flame-proof and moisture-proof tarpaulin or other effective protection against moisture and sparks.
(2) All vehicles used for the transportation of explosive materials shall have tight floors and any exposed spark-producing metal on the inside of the body shall be covered with wood or other nonsparking materials to prevent contact with packages of explosive materials.
Exception: Exposed spark-producing metal need not be covered in vehicles transporting only blasting agents or oxidizers.
(3) Packages of explosive materials shall not be loaded above the sides of an open body vehicle.
(4) Vehicles used for transporting explosive materials shall be inspected weekly, or prior to use when used less than weekly, to determine that it is in proper condition for safe transportation. Such inspections shall include, but not be limited to, the following:
(A) Fire extinguishers that comply with subsection (g) shall be filled and in working order.
(B) All electrical wiring shall be completely protected and securely fastened to prevent short-circuiting.
1. No auxiliary lighting systems on the truck beds shall be powered by the truck's electrical system.
(C) Chassis, motor, pan, and underside of body shall be reasonably clean and free of excess oil and grease.
(D) Fuel tank and feedline shall be secure and have no leaks.
(E) Brakes, lights, horn, windshield wipers, and steering apparatus shall function properly.
(F) Tires shall be checked for proper inflation and defects which may effect the safe operation of the vehicle.
(G) The vehicle shall be in proper condition in every other respect and acceptable for handling explosive materials.
(g) Each vehicle used for transportation of explosive materials shall be equipped with at least two fully charged 4-A:20-B:C fire extinguishers in good condition securely mounted separately in conspicuous locations or in clearly marked compartments and readily accessible. The driver shall be trained in the use of the extinguisher carried on the vehicle.
(h) Vehicles transporting explosive materials for blasting operations shall not carry any other materials except blasting equipment unless the containers of explosive materials are protected from mechanical damage or other materials are secured in place.
(1) When open body vehicles are used to transport explosive materials, the explosive materials shall be carried in a Type 3 magazine or original manufacturer's container that has been securely retained or mounted on the bed of the vehicle to prevent movement.
(2) Special service trucks such as, but not limited to, used in such operations as well services, snow avalanche control, seismic work, and explosives research and development that carry employees and materials and on which equipment is installed for use in connection with the work to be done, may carry small amounts of explosive materials necessary for their activities. When explosive materials are carried, they shall be safeguarded as provided for in subsections (e), (f), and (g).
(i) Motor vehicles or conveyances transporting explosive materials shall be driven by, and be in the charge of, a licensed driver familiar with the local, State, and Federal regulations governing the transportation of explosive materials. The driver shall have been made aware of the class of the explosive materials in the vehicle and of its inherent dangers, and shall have been instructed in the measures and procedures to be followed in order to protect employees from those dangers. The driver shall have been made familiar with the vehicle that has been assigned, and shall be trained and authorized to move the vehicle.
(j) Only the vehicle operator and powder crew shall be permitted to ride on any vehicle transporting explosive materials.
(k) Vehicles carrying explosive materials shall not be taken to a repair garage or shop for any purpose.
(1) No service or repairs involving the use of heat/flame-producing devices shall be performed on vehicles carrying explosive materials.
(l) Vehicles containing explosive materials when stored shall comply with the Quantity Distance Table for the appropriate class of explosive materials. (continued)