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Respirator Change Schedules
OSHA Requirements for Change Schedules
The following is a synopsis of the some of the
requirements of the standard.
The standard requirements for change schedules are found in:
For enforcement policy and guidance, see the OSHA
Directive for Inspection procedures for the Respiratory Protection Standard.
- Employers develop cartridge/canister change schedules based on available data or information. Such
information includes the exposure assessment and information based on breakthrough test
data, mathematically based estimates, and/or reliable use recommendations from the
employer's respirator and/or chemical suppliers.
- Reliance on odor thresholds and
other warning properties will not be permitted as the primary basis for determining the
service life of gas and vapor cartridges and canisters.
- OSHA emphasizes that a
conservative approach is recommended when evaluating service life testing data.
Temperature, humidity, air flow through the filter, the work rate, and the presence of
other potential interfering chemicals in the workplace all can have a serious effect on
the service life of an air-purifying cartridge or canister.
For additional background material, see the OSHA Preamble to Final
Rules for Respiratory Protection.