Environmental Engineering Reference
In-Depth Information
Full-facepiece,
dual cartridge
Half-mask, facepiece-
mounted cartridge.
FIgure 24.13 Example.of.an.air-purifying.respirator..(Courtesy.of.the.National.Institute.
for.Occupational.Safety.and.Health.)
r EsPirAtor f iltEr AnD C AnistEr r EPlACEmEnt
An.important.part.of.the.respiratory.protection.program.includes.identifying.the.use-
ful.life.of.canisters.and.ilters.used.on.air-purifying.respirators.(see.Figure 24.13)..
Each. ilter. and. canister. shall. be. equipped. with. an. end-of-service-life. indicator.
(ESLI).certiied.by.NIOSH.for.the.contaminant..If.there.is.no.ESLI.appropriate.for.
conditions,.a.change.schedule.for.canisters.and.cartridges.that.is.based.on.objective.
information.or.data.will.ensure.that.canisters.and.cartridges.are.changed.before.the.
end.of.their.service.life.
f iltEr AnD C ArtriDgE C HAngE s CHEDulE
Stocks.of.spare.ilters.and.cartridges.shall.be.maintained.to.allow.immediate.change.
when.required.or.desired.by.the.employee..Cartridges.shall.be.changed.based.on.the.
most.limiting.factor.below:
•.
Prior.to.expiration.date
•.
Manufacturer's.recommendations.for.use.and.environment
•.
After.each.use
•.
When.requested.by.employee
•.
When.contaminate.odor.is.detected
•.
When. restriction. to. airlow. has. occurred. as. evidenced. by. an. increased.
effort.by.the.user.to.breathe.normally
Cartridges.shall.remain.in.their.original.sealed.packages.until.needed.for.imme-
diate.use..Filters.shall.be.changed.based.on.the.most.limiting.factor.below:
•.
Prior.to.expiration.date
•.
Manufacturer's.recommendations.for.the.speciic.use.and.environment
•.
When.requested.by.employee
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