Only authorized and qualified persons may handle and use explosives. Smoking, matches, firearms, open-flame lamps and any other fire, flame, heat or spark source are prohibited in or near magazines and wherever explosives are handled, transported or used, and nobody under the influence of alcohol, narcotics or other dangerous drugs may handle or use them. Explosives must be accounted for at all times: those not being used are locked in a magazine that unauthorized persons cannot reach, the employer maintains a record of inventory and use covering all explosives, and loss, theft or unauthorized magazine entry must be reported to the appropriate authorities. Explosives and blasting agents may never be abandoned. A fire in imminent danger of reaching explosives must not be fought; employees are moved to safety and the fire area is guarded so nobody intrudes. Detonators and other explosives are taken from storage to the blast area in original containers or Class II magazines. In congested areas or near structures, railways, highways or other installations that could be damaged, the blaster must take special care in loading, delaying, initiating and confining each blast, using mats or other means to control flying fragments. Those preparing charges or blasting must use every reasonable precaution, including visual and audible warnings, flags or barricades. Above-ground blasting is done between sunup and sundown as far as possible. Accidental firing of electric caps from radar, radio transmitters, lightning, nearby power lines, dust storms or other stray electricity must be prevented by: keeping detonators in primed holes short-circuited and shunted until wired into the circuit; suspending blasting and clearing the area when an electric storm approaches; posting signs against mobile radio transmitter use on every road within 1,000 feet of the blasting (or, where that distance is an operational handicap, alternative provisions evaluated by a competent person, written up, certified by that person, kept at the site for the duration and available to OSHA); deenergizing and locking mobile transmitters less than 100 feet from electric caps outside original containers; and following IME Publication No. 20 (March 1971) on radio frequency hazards. Empty high-explosive packaging is never reused and is burned at an approved location. Obviously deteriorated or damaged explosives and supplies may not be used. Explosives are delivered and issued only by and to authorized persons, and only into approved temporary storage or handling areas or authorized magazines. Blasting near overhead power or communication lines, utilities or other structures waits until owners or operators are notified and safe controls are in place. Black powder is prohibited. Competent persons with thorough experience in the field must direct and supervise all loading and firing, and blasts are fired electrically with a blasting machine or properly designed power source except as 1926.906(a) and (r) allow. Buildings used to mix blasting agents or water gels must be built of noncombustible materials or of sheet metal on wood studs, with concrete or other nonabsorbent floors, fuel oil storage separated and arranged to drain away from the plant, good ventilation, no direct heat sources inside (only properly designed non-combustion heaters), and internal-combustion generator engines outside or ventilated and isolated by a firewall with exhausts placed so sparks cannot endanger materials.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.