Wood preservation facilities, ammoniacal copper zinc arsenate: chapter C, table 8

Table 8. Additional Safety Precautions for Personnel Working with ACZA

Activity	Recommendations
Objective: Ensure safe workplace practices for each activity during the treatment process
Cleaning cylinders or storage tanks	Personal protective equipment: Select NIOSH-approved respirators with combination of acid gas/ammonia high-efficiency filter cartridges with a P100 prefilter (or breathing apparatus if working in an enclosed environment) approved for inorganic arsenic.
Removing treated charges from cylinders.	Retort opening PPE: Wear appropriate NIOSH-approved respirator with combination of acid gas/ammonia high-efficiency filter cartridges with a P100 prefilter and approved for inorganic arsenic if ACZA concentrations are above regulatory values or concentrations are unknown.

2017-09-10