Notice of Intended Changes List

CHEMICAL SUBSTANCES TLVs®
2015 NOTICE OF INTENDED CHANGES (NIC)
Introduction to the Chemical Substances
     – Peak Exposures 
Boron tribromide
Boron trichloride
Boron trifluoride
n-Butyl acetate (withdraw adopted TLV®
     and Documentation; refer to Butyl
     acetates, all isomers)
sec-Butyl acetate (withdraw adopted TLV®
     and Documentation; refer to Butyl
     acetates, all isomers)
tert-Butyl acetate (withdraw adopted TLV®
     and Documentation; refer to Butyl
     acetates, all isomers) 
Butyl acetates, all isomers
Calcium silicate, naturally occurring
    as Wollastonite
Calcium silicate, synthetic nonfibrous
     (withdraw adopted TLV® and
     Documentation; refer to Appendix B:
     Particles (insoluble or poorly soluble)
     Not Otherwise Specified (PNOS)) 
Cyanogen
Ethylene glycol
Hard metals containing Cobalt and
    Tungsten carbide, as Co
Isobutyl acetate (withdraw adopted TLV®
     and Documentation; refer to Butyl
     acetates, all isomers) 

Methyl 2-cyanoacrylate
Phosphine (withdraw from Notice of
     Intended Changes) 
Propoxur
Simazine
Toluene-2,4- or 2,6-diisocyanate
    (or as a mixture)
Trimetacresyl phosphate
Triorthocresyl phosphate
Triparacresyl phosphate
Warfarin

PHYSICAL AGENTS TLVs®
2015 NOTICE OF INTENDED CHANGES (NIC)
Electromagnetic Fields 0–300 GHz

Ergonomics

BIOLOGICAL EXPOSURE INDICES (BEIs®)
2015 NOTICE OF INTENDED CHANGES (NIC)
Toluene diisocyanate-2,4- or 2,6-
     or as a mixture of isomers