1. Work areas shall be separated by distances, barriers, or other means so that a fire at one area will not ignite material at another area.
2. Ventilation and dust-control equipment shall be of such type and so installed and operated as not to endanger employees by possible ignition of explosives. Ducts shall be grounded and as short and straight as possible with no capped outlets, pockets, or other dead-end spaces where explosives might accumulate.
3. Benches and other fixtures shall be of noncombustible materials; provided, however, that static proof (conductive) coverings may be used.
4. Hydraulic and pneumatic presses, including hand jacks, shall be provided with pressure relief valves so arranged and set that material in process will not be subjected to pressures likely to cause it to explode. Dies and plugged press equipment shall not be cleared by striking blows that may cause the material to detonate or burn.
5. Mechanical screening, mixing, or blending operations involving explosive materials shall only be carried on in isolated areas or buildings used exclusively for such purposes, and, wherever practicable, such operations shall be carried on with no personnel present during the period the machinery is operating. At least one set of power controls shall be remotely located at a safe point from the screening, mixing, or blending area. If the operation requires the presence of employees, only the least practicable number of employees shall be present, except that additional employees may be present for purposes of instruction.
6. Means shall be provided whereby accumulated static electricity is removed from hand trucks, buggies, and similar devices before they enter a building or work area.
7. Wet processes shall be used wherever practicable in mixing explosive materials.
8. Maintenance or repair work on machines shall not be done while explosive materials are present in a building or work area; provided, however, that this shall not prohibit minor adjustments or repairs where it would not be practicable to clear the building or work area, nor shall it prohibit emergency maintenance necessary to secure immediate safety.
9. Suitable exterior barricades, either natural or artificial, shall be provided on pressure relief sides of building. Due consideration shall be given to the effects of probable flying missiles with particular attention to the safety of personnel.