Ventilation capable of keeping the HCN concentration at or below 10 ppm shall be provided in all enclosed structures where cyanide, either dry or in solution, is used or stored.
Ariz. Admin. Code § R11-1-2219
Ventilation capable of keeping the HCN concentration at or below 10 ppm shall be provided in all enclosed structures where cyanide, either dry or in solution, is used or stored.
Ariz. Admin. Code § R11-1-2219