Blasting and Use of Explosives

OREGON OCCUPATIONAL

SAFETY AND HEALTH STANDARDS

Oregon Administrative Rules, Chapter 437

DIVISION 3 (29 CFR 1926)

CONSTRUCTION

Subdivision U

Blasting and the Use of Explosives

Oregon Occupational Safety and Health Division (Oregon OSHA)

Department of Consumer and Business Services

Salem, Oregon 97301-3882

AO 3-2000

The Oregon Department of Consumer and Business Services adopted these rules pursuant to ORS

654.025(2).

The Secretary of State Designated OAR Chapter 437 as the “Oregon Occupational Safety and Health Code.”

Six general subject areas within this code are designated as “Divisions.”

Division 1 General Administrative Rules
Division 2 General Occupational Safety and Health Rules
Division 3 Construction
Division 4 Agriculture
Division 5 Maritime Activities
Division 7 Forest Activities
Oregon Revised Statutes (ORS) 654 The Oregon Safe Employment Act (OSEAct)

Oregon-initiated rules in this division of the Oregon Occupational Safety and Health Code are numbered in a uniform system developed by the Secretary of State. This system does not number the rules in sequence (001, 002, 003, etc.). Omitted numbers may be assigned to new rules at the time of their adoption.

Oregon-initiated rules are arranged in the following Basic Codification Structure adopted by the Secretary of

State for Oregon Administrative Rules (OAR):

ChapterDivisionRuleSectionSubsection Paragraphs

4370031760(1)(a)(A)(i)(I)

The majority of Oregon OSHA codes are adopted by reference from the Code of Federal Regulations (CFR),

and are arranged in the following basic federal numbering system:

ChapterDivisionPartSubpartSection Paragraphs

(Subdivision)

4370031926M.502(a)

The terms “subdivision” and “subpart” are synonymous within OAR 437, Oregon Occupational Safety and

Health Code.

To obtain an order form or copies of these codes, address:

Department of Consumer & Business Services

Oregon Occupational Safety & Health Division (Oregon OSHA)

350 Winter St. NE, Room 430

Salem, OR 97301-3882

Or call the Oregon OSHA Resource Library at 503-378-3272

The rules referenced in this division are available for viewing in the Office of the Secretary of State, Administrative Rules and Office Document Section, Oregon State Archives Building, Salem, Oregon 97310,

or the Central Office, Oregon Occupational Safety and Health Division of the Department of Consumer and Business Services, Room 430, 350 Winter St. NE Salem, OR 97301-3882. Please visit our web site at:

Oregon Administrative Rules
Oregon Occupational Safety
and Health Division /

BLASTING AND THE

USE OF EXPLOSIVES

/ U

TABLE OF CONTENTS

1926.900General provisions...... U-1

1926.901Blaster qualifications...... U-4

1926.902Surface transportation of explosives...... U-4

1926.903Underground transportation of explosives...... U-5

1926.904Storage of explosives and blasting agents...... U-7

1926.905Loading of explosives or blasting agents...... U-7

1926.906Initiation of explosive charges – electric blasting...... U-9

1926.907Use of safety fuse...... U-11

1926.908Use of detonating cord...... U-12

1926.909Firing the blast...... U-13

1926.910Inspection after blasting...... U-13

1926.911Misfires...... U-14

1926.912Underwater blasting...... U-15

1926.913Blasting in excavation work under compressed air...... U-16

1926.914Definitions applicable to this subdivision...... U-17

Subdivision UU-1Table of Contents

Oregon Administrative Rules
Oregon Occupational Safety
and Health Division /

BLASTING AND THE

USE OF EXPLOSIVES

/ U

OAR 437, DIVISION 3

CONSTRUCTION

SUBDIVISION U – BLASTING AND USE OF EXPLOSIVES

437-003-0001 Adoption by Reference. In addition to, and not in lieu of, any other safety and health codes contained in OAR Chapter 437, the Department adopts by reference the following federal regulations printed as part of the Code of Federal Regulations, in the Federal Register:

(21) Subdivision U – Blasting and Use of Explosives.

(a)29 CFR 1926.900 General provisions, published 4/6/79, FR vol. 44, p. 20940.

(b)29 CFR 1926.901 Blaster qualifications, published 4/6/79, FR vol. 44, p. 20940.

(d)29 CFR 1926.903 Underground transportation of explosives, published 4/6/79, FR vol. 44, p. 20940.

(e)29 CFR 1926.904 Storage of explosives and blasting agents, published 6/30/93, FR vol. 58, no. 124, p. 35311.

(f)29 CFR 1926.905 Loading of explosives or blasting agents, published 6/30/93, FR vol. 58, no. 124, p. 35184.

(g)29 CFR 1926.906 Initiation of explosive charges – electric blasting, published 6/18/98, FR vol. 63, no. 117, p. 33469.

(h) 29 CFR 1926.907 Use of safety fuse, published 4/6/79, FR vol. 44, p. 20940.

(i) 29 CFR 1926.908 Use of detonating cord, published 4/6/79, FR vol. 44, p. 20940.

(j) 29 CFR 1926.909 Firing the blast, published 4/6/79, FR vol. 44, p. 20940.

(k) 29 CFR 1926.910 Inspection after blasting, published 4/6/79, FR vol. 44, p. 20940.

(l) 29 CFR 1926.911 Misfires, published 4/6/79, FR vol. 44, p. 20940.

(m) 29 CFR 1926.912 Underwater blasting, published 4/6/79, FR vol. 44, p. 20940.

(n)29 CFR 1926.913 Blasting in excavation work under compressed air, published 4/6/79, FR vol. 44, p. 20940.

(o)29 CFR 1926.914 Definitions applicable to this subpart, published 6/30/93, FR vol. 58, no. 124, p. 35184, 35311.

These standards are available at the Oregon Occupational Safety and Health Division, Oregon Department of Consumer and Business Services, and the United States Government Printing Office.

Stat. Auth.: ORS 654.025(2) and 656.726(4).

Stats. Implemented: ORS 654.001 through 654.295.

Hist:APD Admin. Order 5-1989, f. 3/31/89, ef. 5/1/89 (temp).

APD Admin. Order 8-1989, f. 7/7/89, ef. 7/7/89 (perm).

APD Admin. Order 14-1989, f. 7/20/89, ef. 8/1/89 (temp).

APD Admin. Order 15-1989, f. 9/13/89, ef. 9/13/89 (perm).

APD Admin. Order 16-1989 (temp), f. 9/13/89, ef. 9/13/89.

OR-OSHA Admin. Order 2-1989, f. 10/17/89, ef. 10/17/89.

OR-OSHA Admin. Order 3-1990, f. 1/19/90, ef. 1/19/90 (temp).

OR-OSHA Admin. Order 7-1990, f. 3/2/90, ef. 3/2/90 (perm).

OR-OSHA Admin. Order 8-1990, f. 3/30/90, ef. 3/30/90.

OR-OSHA Admin. Order 13-1990, f. 6/28/90, ef. 8/1/90 (temp).

OR-OSHA Admin. Order 19-1990, f. 8/31/90, ef. 8/31/90 (perm).

OR-OSHA Admin. Order 27-1990, f. 12/12/90, ef. 2/1/91.

OR-OSHA Admin. Order 6-1991, f. 3/18/91, ef. 4/15/91.

OR-OSHA Admin. Order 7-1991, f. 4/25/91, ef. 4/25/91.

OR-OSHA Admin. Order 15-1991, f. 12/13/91, ef. 12/13/91.

OR-OSHA Admin. Order 16-1991, f. 12/16/91, ef. 1/1/92.

OR-OSHA Admin. Order 6-1992, f. 5/18/92, ef. 5/18/92.

OR-OSHA Admin. Order 11-1992, f. 10/9/92, ef. 10/9/92.

OR-OSHA Admin. Order 1-1993, f. 1/22/93, ef. 1/22/93.

OR-OSHA Admin. Order 16-1993, f. 11/1/93, ef. 11/1/93 (Lead).

OR-OSHA Admin. Order 1-1994, f. 4/27/94, ef. 4/27/94.

OR-OSHA Admin. Order 4-1994, f. 8/4/94, ef. 8/4/94 (HazCom).

OR-OSHA Admin. Order 6-1994, f. 9/30/94, ef. 9/30/94.

OR-OSHA Admin. Order 1-1995, f. 1/19/95, ef. 1/19/95 (DOT markings, placards & labels).

OR-OSHA Admin. Order 3-1995, f. 2/22/95, ef. 2/22/95 (Haz Waste).

OR-OSHA Admin. Order 4-1995, f. 3/29/95, ef. 3/29/95 (Asbestos).

OR-OSHA Admin. Order 5-1995, f. 4/6/95, ef. 4/6/95 (HazCom).

OR-OSHA Admin. Order 6-1995, f. 4/18/95, ef. 6/1/95 (Fall Protection).

OR-OSHA Admin. Order 8-1995, f. 8/25/95, ef. 8/25/95 (Asbestos).

OR-OSHA Admin. Order 5-1996, f. 11/29/96, ef. 11/29/96.

OR-OSHA Admin. Order 6-1996, f. 11/29/96, ef. 11/29/96.

OR-OSHA Admin. Order 2-1997, f. 3/12/97, ef. 3/12/97.

OR-OSHA Admin. Order 4-1997, f. 4/2/97, ef. 4/2/97.

OR-OSHA Admin. Order 6-1997, f. 5/2/97, ef. 5/2/97.

OR-OSHA Admin. Order 7-1997, f. 9/15/97, ef. 9/15/97 (Fall Protection).

OR-OSHA Admin. Order 8-1997, f. 11/14/97, e. 11/14/97 (Methylene Chloride).

OR-OSHA Admin. Order 1-1998, f. 2/13/98, e. 2/13/98 (Methylene Chloride).

OR-OSHA Admin. Order 3-1998, f. 7/7/98, ef. 7/7/98 (Respiratory Protection).

OR-OSHA Admin. Order 6-1998, f. 10/15/98, ef. 10/15/98 (Slings 3/H).

OR-OSHA Admin. Order 7-1998, f. 12/28/98, ef. 12/28/98 (Asbestos).

OR-OSHA Admin. Order 1-1999, f. 3/22/99, e. 3/22/99 (Methylene Chloride).

OR-OSHA Admin. Order 4-1999, f. 4/30/99, ef. 4/30/99.

OR-OSHA Admin. Order 6-1999, f. 5/26/99, ef. 5/26/99.

OR-OSHA Admin. Order 3-2000, f. 2/8/00, ef. 2/8/00.

OR-OSHA Admin. Order 3-2001, f. 2/5/01, ef. 2/5/01 (Fall Protection/Oregon Exceptions).

OR-OSHA Admin. Order 3-2002, f. 4/15/02, ef. 4/18/02 (Steel Erection).

OR-OSHA Admin. Order 5-2002, f. 6/28/02, ef. 10/1/03 (GFCI 3/K).

OR-OSHA Admin. Order 6-2002, f. 7/19/02, ef. 7/19/02 (Fall Protection/Steel Erection).

OR-OSHA Admin. Order 1-2003, f. 1/30/03, ef. 4/30/03 (3/Q Masonry Wall Bracing).

OR-OSHA Admin. Order 2-2003, f. 1/30/03, ef. 1/30/03 (3/G).

OR-OSHA Admin. Order 7-2003, f. 12/5/03, ef. 12/5/03 (3/O).

OR-OSHA Admin. Order 8-2003, f. 12/30/03, ef. 1/1/04 (3/R).

OR-OSHA Admin. Order 1-2005, f. 4/12/05, ef. 4/12/05 (3/D and 3/Z).

OR-OSHA Admin. Order 2-2006, f. 4/28/06, ef. 4/28/06 (3/R).

OR-OSHA Admin. Order 4-2006, f. 7/24/06, ef. 7/24/06.

OR-OSHA Admin. Order 5-2006, f. 8/7/06, ef. 1/1/07.

OR-OSHA Admin. Order 6-2006, f. 8/30/06, ef. 8/30/06.

OR-OSHA Admin. Order 10-2006, f. 11/30/06, ef. 11/30/06.

OR-OSHA Admin. Order 6-2007, f. 9/26/07, ef. 9/26/07 (3/O).

OR-OSHA Admin. Order 5-2008, f. 5/1/08, ef. 5/15/08 (PPE).

OR-OSHA Admin. Order 5-2009, f. 5/29/09, ef. 5/29/09.

OR-OSHA Admin. Order 3-2010, f. 6/10/10, ef. 6/15/10.

OR-OSHA Admin. Order 1-2011, f. 2/9/11, ef. 2/9/11.

OR-OSHA Admin. Order 4-2011, f. 12/8/11, ef. 12/8/11.

OR-OSHA Admin. Order 5-2011, f. 12/8/11, ef. 7/1/12.

OR-OSHA Admin. Order 1-2012, f. 4/10/12, ef. 4/10/12.

OR-OSHA Admin. Order 5-2012, f. 9/25/12, ef. 9/25/12.

OR-OSHA Admin. Order 1-2013, f. 2/14/13, ef. 2/14/13.

OR-OSHA Admin. Order 2-2013, f. 2/15/13, ef. 4/1/13.

OR-OSHA Admin. Order 4-2013, f. 7/19/13, ef. 7/19/13.

OR-OSHA Admin. Order 5-2013, f. 9/13/13, ef. 9/13/13.

OR-OSHA Admin. Order 6-2013, f. 10/9/13, ef. 10/9/13.

OR-OSHA Admin. Order 7-2013, f. 12/12/13, ef. 12/12/13.

OR-OSHA Admin. Order 6-2014, f. 10/28/14, ef. 5/1/15.

OR-OSHA Admin. Order 7-2014, f. 11/7/14, ef. 11/9/14.

437-003-0001U-1(21)(a) – (21)(o)

Oregon Administrative Rules
Oregon Occupational Safety
and Health Division / GENERAL PROVISIONS / U

SUBDIVISION U

BLASTING AND THE USE OF EXPLOSIVES

Authority: Sec. 107, Contract Work Hours and Safety Standards Act (Construction Safety Act) (40 U.S.C. 333); secs. 4, 6, 8, Occupational Safety and Health Act of 1970 (29 U.S.C. 653, 655, 657); Secretary of Labor’s Order No. 12-71 (36 FR 8754), 8-76 (41 FR 25059), or 9-83 (48 FR 35736), as applicable.

§1926.900 General Provisions.

(a)The employer shall permit only authorized and qualified persons to handle and use explosives.

(b)Smoking, firearms, matches, open flame lamps, and other fires, flame or heat producing devices and sparks shall be prohibited in or near explosive magazines or while explosives are being handled, transported or used.

(c)No person shall be allowed to handle or use explosives while under the influence of intoxicating liquors, narcotics, or other dangerous drugs.

(d)All explosives shall be accounted for at all times. Explosives not being used shall be kept in a locked magazine, unavailable to persons not authorized to handle them. The employer shall maintain an inventory and use record of all explosives. Appropriate authorities shall be notified of any loss, theft, or unauthorized entry into a magazine.

(e)No explosives or blasting agents shall be abandoned.

(f)No fire shall be fought where the fire is in imminent danger of contact with explosives. All employees shall be removed to a safe area and the fire area guarded against intruders.

(g)Original containers, or Class II magazines, shall be used for taking detonators and other explosives from storage magazines to the blasting area.

(h)When blasting is done in congested areas or in proximity to a structure, railway, or highway, or any other installation that may be damaged, the blaster shall take special precautions in the loading, delaying, initiation, and confinement of each blast with mats or other methods so as to control the throw of fragments, and thus prevent bodily injury to employees.

(i)Employees authorized to prepare explosive charges or conduct blasting operations shall use every reasonable precaution including, but not limited to, visual and audible warning signals, flags, or barricades, to ensure employee safety.

(j)Insofar as possible, blasting operations above ground shall be conducted between sunup and sundown.

(k)Due precautions shall be taken to prevent accidental discharge of electric blasting caps from current induced by radar, radio transmitters, lightning, adjacent powerlines, dust storms, or other sources of extraneous electricity. These precautions shall include:

(1)Detonators shall be short-circuited in holes which have been primed and shunted until wired into the blasting circuit.

(2)The suspension of all blasting operations and removal of persons from the blasting area during the approach and progress of an electric storm;

(3)

(i)The prominent display of adequate signs, warning against the use of mobile radio transmitters, on all roads within 1,000 feet of blasting operations. Whenever adherence to the 1,000-foot distance would create an operational handicap, a competent person shall be consulted to evaluate the particular situation, and alternative provisions may be made which are adequately designed to prevent any premature firing of electric blasting caps. A description of any such alternatives shall be reduced to writing and shall be certified as meeting the purposes of this subdivision by the competent person consulted. The description shall be maintained at the construction site during the duration of the work, and shall be available for inspection by representatives of the Secretary of Labor.

(ii)
Specimens of signs which would meet the requirements of paragraph (k)(3) of this section are the following:

1926.900U-1(a) – (i)

Oregon Administrative Rules
Oregon Occupational Safety
and Health Division / GENERAL PROVISIONS / U

(4)Ensuring that mobile radio transmitters which are less than 100 feet away from electric blasting caps, in other than original containers, shall be deenergized and effectively locked;

(5)Compliance with the recommendations of The Institute of the Makers of Explosives with regard to blasting in the vicinity of radio transmitters as stipulated in Radio Frequency Energy – A Potential Hazard in the Use of Electric Blasting Caps, IME Publication No. 20, March 1971.

(l)Empty boxes and paper and fiber packing materials, which have previously contained high explosives, shall not be used again for any purpose, but shall be destroyed by burning at an approved location.

(m)Explosives, blasting agents, and blasting supplies that are obviously deteriorated or damaged shall not be used.

(n)Delivery and issue of explosives shall only be made by and to authorized persons and into authorized magazines or approved temporary storage or handling areas.

(o)Blasting operations in the proximity of overhead power lines, communication lines, utility services, or other services and structures shall not be carried on until the operators and/or owners have been notified and measures for safe control have been taken.

(p)The use of black powder shall be prohibited.

(q)All loading and firing shall be directed and supervised by competent persons thoroughly experienced in this field.

(r)All blasts shall be fired electrically with an electric blasting machine or properly designed electric power source, except as provided in §1926.906(a) and (r).

Stat. Auth.: ORS 654.025(2) and 656.726(3).

Hist:APD Admin. Order 4-1989, f. 3/31/89, ef. 5/1/89 (temp).

APD Admin. Order 8-1989, f. 7/7/89, ef. 7/7/89 (perm).

§1926.901 Blaster Qualifications.

(a)A blaster shall be able to understand and give written and oral orders.

(b)A blaster shall be in good physical condition and not be addicted to narcotics, intoxicants, or similar types of drugs.

(c)A blaster shall be qualified, by reason of training, knowledge, or experience, in the field of transporting, storing, handling, and use of explosives, and have a working knowledge of State and local laws and regulations which pertain to explosives.

(d)Blasters shall be required to furnish satisfactory evidence of competency in handling explosives and performing in a safe manner the type of blasting that will be required.

(e)The blaster shall be knowledgeable and competent in the use of each type of blasting method used.

Stat. Auth.: ORS 654.025(2) and 656.726(3).

Hist:APD Admin. Order 4-1989, f. 3/31/89, ef. 5/1/89 (temp).

APD Admin. Order 8-1989, f. 7/7/89, ef. 7/7/89 (perm).

§1926.902 Surface Transportation of Explosives.

(a)Transportation of explosives shall meet the provisions of Department of Transportation regulations contained in 46 CFR Parts 146-149, Water Carriers; 49 CFR Parts 171-179, Highways and Railways; 49 CFR Part 195, Pipelines; and 49 CFR Parts 390-397, Motor Carriers.

(b)Motor vehicles or conveyances transporting explosives shall only be driven by, and be inthe charge of, a licensed driver who is physically fit. He shall be familiar with the local, State, and Federal regulation governing the transportation of explosives.

(c)No person shall smoke, or carry matches or any other flame-producing device, nor shall firearms or loaded cartridges be carried while in or near a motor vehicle or conveyance transporting explosives.

(d)Explosives, blasting agents, and blasting supplies shall not be transported with other materials or cargoes. Blasting caps (including electric) shall not be transported in the same vehicle with other explosives.

(e)Vehicles used for transporting explosives shall be strong enough to carry the load without difficulty, and shall be in good mechanical condition.

(f)When explosives are transported by a vehicle with an open body, a Class II magazine ororiginal manufacturer’s container shall be securely mounted on the bed to contain the cargo.

1926.900U-1(k)(4) – (r)

Oregon Administrative Rules
Oregon Occupational Safety
and Health Division / SURFACE TRANSPORTATION
OF EXPLOSIVES / UNDERGROUND
TRANSPORTATION OF EXPLOSIVES / U

(g)All vehicles used for the transportation of explosives shall have tight floors and any exposed spark-producing metal on the inside of the body shall be covered with wood, or other nonsparking material, to prevent contact with containers of explosives.

(h)Every motor vehicle or conveyance used for transporting explosives shall be marked or placarded on both sides, the front, and the rear with the word “Explosives” in red letters, not less than 4 inches in height, on white background. In addition to such marking or placarding, the motor vehicle or conveyance may display, in such a manner that it will be readily visible from all directions, a red flag 18 inches by 30 inches, with the word “Explosives” painted, stamped, or sewed thereon, in white letters, at least 6 inches in height.

(i)Each vehicle used for transportation of explosives shall be equipped with a fully charged fire extinguisher, in good condition. An Underwriters Laboratory-approved extinguisher of not less than 10-ABC rating will meet the minimum requirement. The driver shall be trained in the use of the extinguisher on his vehicle.

(j)Motor vehicles or conveyances carrying explosives, blasting agents, or blasting supplies, shall not be taken inside a garage or shop for repairs or servicing.

(k)No motor vehicle transporting explosives shall be left unattended.

Stat. Auth.: ORS 654.025(2) and 656.726(3).

Stats. Implemented: ORS 654.001 through 654.295.

Hist:APD Admin. Order 4-1989, f. 3/31/89, ef. 5/1/89 (temp).

APD Admin. Order 8-1989, f. 7/7/89, ef. 7/7/89 (perm).

OR-OSHA Admin. Order 3-2000,f. 2/8/00, ef. 2/8/00.

§1926.903 Underground Transportation of Explosives.

(a)All explosives or blasting agents in transit underground shall be taken to the place of use or storage without delay.

(b)The quantity of explosives or blasting agents taken to an underground loading area shall not exceed the amount estimated to be necessary for the blast.

(c)Explosives in transit shall not be left unattended.

(d)The hoist operator shall be notified before explosives or blasting agents are transported in a shaft conveyance.

(e)Trucks used for the transportation of explosives underground shall have the electrical system checked weekly to detect any failures which may constitute an electrical hazard. A certification record which includes the date of the inspection; the signature of the person who performed the inspection; and a serial number, or other identifier, of the truck inspected shall be prepared and the most recent certification record shall be maintained on file.

(f)The installation of auxiliary lights on truck beds, which are powered by the truck’s electrical system, shall be prohibited.

(g)Explosives and blasting agents shall be hoisted, lowered, or conveyed in a powder car. No other materials, supplies, or equipment shall be transported in the same conveyance at the same time.

(h)No one, except the operator, his helper, and the powderman, shall be permitted to ride on a conveyance transporting explosives and blasting agents.

(i)No person shall ride in any shaft conveyance transporting explosives and blasting agents.

(j)No explosives or blasting agents shall be transported on any locomotive. At least two carlengths shall separate the locomotive from the powder car.

(k)No explosives or blasting agents shall be transported on a man haul trip.

(l)The car or conveyance containing explosives or blasting agents shall be pulled, not pushed, whenever possible.

(m)The powder car or conveyance especially built for the purpose of transporting explosives or blasting agents shall bear a reflectorized sign on each side with the word “Explosives” in letters, not less than 4 inches in height; upon a background of sharply contrasting color.

(n)Compartments for transporting detonators and explosives in the same car or conveyance shall be physically separated by a distance of 24 inches or by a solid partition at least 6 inches thick.

(o)Detonators and other explosives shall not be transported at the same time in any shaft conveyance.

(p)Explosives, blasting agents, or blasting supplies shall not be transported with other materials.

(q)Explosives or blasting agents, not in original containers, shall be placed in a suitable container when transported manually.

(r)Detonators, primers, and other explosives shall be carried in separate containers when transported manually.

(44 FR 8577, Feb. 9, 1979; 44 FR 20940, Apr. 6, 1979, as amended at 52 FR 36382, Sept. 28, 1987)

Stat. Auth.: ORS 654.025(2) and 656.726(3).

Hist:APD Admin. Order 4-1989, f. 3/31/89, ef. 5/1/89 (temp).

APD Admin. Order 8-1989, f. 7/7/89, ef. 7/7/89 (perm).

1926.902(g)U-11926.903(e)

Oregon Administrative Rules
Oregon Occupational Safety
and Health Division / STORAGE OF EXPLOSIVES &
BLASTING AGENTS / LOADING OF
EXPLOSIVES OR BLASTING AGENTS / U

§1926.904 Storage of Explosives and Blasting Agents.