Ongoing refresher training, audits, practice, and equipment review are all facilitated by the coalition process. It is concluded that the coordinated involvement of the coalition members led to the development of highly effective and skilled confined space rescuers, a benefit not only to the coalition members, but to the community as a whole. Exposure Concerns During Confined Space Welding Activities. Additional exposure concerns may arise from the residue remaining in the confined space from the processed material. Particulate contaminants of interest may be generated from alloying metals or trace contaminants such as cobalt, nickel, chromium, arsenic, and lead.
Gaseous exposures involve ozone, nitrogen dioxide, carbon monoxide, and sulfur dioxide.
These exposures are associated with a number of traditional hotwork processes such as air arc-gouging, torch cutting, and stick and TIG welding. Industrial hygienists must be aware of these potential exposures to assess them adequately in order to recommend appropriate, but not excessive, control measures. Available controls include dilution or local exhaust ventilation, work practice modifications or substitutions, and personal protective equipment. The success of these control measures will influence the importance of regulatory issues such as substance-specific standards for lead, arsenic, and cadmium. Control of Contractor Confined Space Entries at a Large Manufacturing Facility.