TLV^®/BEI^® DEVELOPMENT PROCESS: AN OVERVIEW
2013 NOTICE OF INTENDED CHANGES (NIC)
Note: See http://www.acgih.org/TLV/Proposed_
TLV-BEI_Development_Process.pdf for proposed revisions to the TLV^®/BEI^® Development Process: An Overview section. Proposed revisions include a revised submission deadline for comments.

CHEMICAL SUBSTANCES TLVs^®
2013 NOTICE OF INTENDED CHANGES (NIC)
Acetaldehyde
Acetone
Argon (withdraw adopted Documentation;
    refer to Appendix F: Minimal Oxygen
    Content)
Atrazine
Barium sulfate
1-Bromopropane
Dimethylamine
Ethyl isocyanate
Ethylidene norbonene
Helium (withdraw adopted Documentation;
    refer to Appendix F: Minimal Oxygen
    Content)
Hydrogen (withdraw adopted Documentation;
    refer to Appendix F: Minimal Oxygen
    Content)
Methomyl
Methyl formate
Methyl isocyanate
Naphthalene
Neon (withdraw adopted Documentation;
    refer to Appendix F: Minimal Oxygen
    Content)
Nickel carbonyl
Nitrogen (withdraw adopted Documentation;
    refer to Appendix F: Minimal Oxygen
    Content)
Pentachlorophenol
Pentane, all isomers
Peracetic acid
Phenyl isocyanate
Simazine
Titanium dioxide
Toluene-2,4- or 2,6-diisocyanate (or as
    a mixture)
Trichloroacetic acid
1,2,3-Trichloropropane
Triethylamine

2013 NOTICE OF INTENDED CHANGES (NIC) – UPDATES OF SENSITIZER (SEN) NOTATIONS TO DERMAL SENSITIZER (DSEN) AND/OR RESPIRATORY SENSITIZER (RSEN). THE FOLLOWING SUBSTANCES ARE PLACED ON THE NIC FOR REVIEW OF THIS NOTATION ONLY
Alachlor
Allyl propyl disulfide
Azinphos-methyl
Benomyl
Beryllium and compounds, as Be

n-Butyl acrylate
n-Butyl glycidyl ether
Captan
Citral
Demeton-S-methyl
Dichlorvos
Dodecyl mercaptan
Flour dust
Glyoxal
Hexahydrophthalic anhydride, all isomers
Hydroquinone
2-Hydroxypropyl acrylate
Maleic anhydride
Methyl acrylate
Methyl methacrylate
Naled
Natural rubber latex, as inhalable
    allergenic proteins
Phenyl glycidyl ether
Phthalic anhydride
Piperazine and salts, as piperazine
Propylene dichloride
Propylene oxide
Rosin core solder thermal decomposition
    products (colophony)
Tetrakis (hydromethyl) phosphonium salts
     Tetrakis (hydromethyl) phosphonium
         chloride
     Tetrakis (hydromethyl) phosphonium
         sulfate
Thiram
Trimellitic anhydride
Turpentine and selected monoterpenes
Wood dusts
     Western red cedar
     All other species
     Carcinogenicity
         Oak and beech
         Birch, mahogany, teak, walnut
         All other wood dusts

PHYSICAL AGENTS TLVs^®
2013 NOTICE OF INTENDED CHANGES (NIC)
There are no agents proposed for the 2013 Notice of Intended Changes.

BIOLOGICAL EXPOSURE INDICES (BEIs^®)
2013 NOTICE OF INTENDED CHANGES (NIC)
Acetone
Ethyl benzene
Nitrobenzene (withdraw adopted
    Documentation and BEI^® due to
    inadequate analytical method and
    lack of field data for P-Nitrophenol
    in urine. Methemoglobin in blood
    BEI^® – refer to the Methemoglobin
    inducers BEI^® for assessment of
    exposure to Nitrobenzene)
Pentachlorophenol
Toluene diisocyanate