Specification

! ! Page!5!of!10#
Date#of#Issue:##06/01/15!
!
Calcium!Silicate!(Total!Dust)!
(Respirable)!
___
!
___
!
___
!
___
!
15!mg/m
3
!
5!mg/m
3
!
Nuisance!Dust!(Not!Otherwise!
Specified)!(Total!Dust)!
(Respirable)!
!
10!mg/m
3
(inhalable)!
3!mg/m
3
!
!
50!
15!
!
15!mg/m
3
!
5!mg/m
3
!
Cellulose!(Total)!
(Respirable)!
___
!
___
!
___
!
___
!
15!mg/m
3
!
5!mg/m
3
!
Carbon!Black!
3.5!mg/m
3
!
___
!
3.5!mg/m
3
!
Other#limits#recommended:!!The!Nationa l!In st itu te !o f!Occupa tional!Safe t y!a n d !H e a lth !( N IO S H ) !als o !
has!a!Recommended!Exposure!Limit!(REL)!of!0.05!mg/m
3
!for!respirable !crysta lline!silica,!ba se d!on !a!
10-hour!time-weighted!average.!!!
Engineering#Controls#
Personal!protection!when!handling!products!that!may!generate!silica!dust:!!(1)!follow!James!
Hardie!®!instructions!and!best!practices!to!reduce!or!limit!the!release!of!dust;!(2)!warn!others!
in!the!are a !to !av o id !th e !d us t;!(3 )!when!us in g !m e c ha n ic al!s aw!or!high-speed!cutting!tools,!work!
outdoors!and!use!dust!collection!equipment,!and!(4)!if!no!other!dust!controls!are!available,!
wear!a!NIOSH-approved!dust!mask!or!respirator!(e.g.!N95!dust!mask).!!
!
During!clean-up,!use!a!well-maintained!vacuum!and!filter!appropriate!for!capturing!fine!
(respirable)!dus t!or!us e!w et!cle an up !m eth od s —never!dry!sweep.!
Cutting!Outdoors!
1. Position!cutting!station!so!that!wind!will!blow!dust!away!
from!user!or!o the rs!in!w ork ing !area !and !allow !fo r!am p le!
dust!dissipation!
2. Use!one!of!the!following!methods!based!on!the!required!
cutting!rate!and!job-site!conditions:!
BEST!
• Score!and!snap!using!carbide-tipped!scoring !
knife!or!utility!knife!
• Fiber-cement!shears!(electric!or!pneumatic)!
BETTER!
• Dust!reducing!circular!saw!equipped!with!
Hardieblade!
TM
!saw!blade!and!HEPA!vacuum!
extraction!
GOOD!(for!low!to!moderate!cutting!only)!
• Dust!reducing!circular!saw!with!Hardieblade!
TM
!
saw!blade!
Cutting!Indoors!
• Cut!only!using!score!and!snap!method!or!with!
fiber-cemen t!shears!(manual,!electric!or!
pneumatic)!
• Position!cutting!station!in!well-ventilated!area!to!
allow!for!dust!dissipation!