Why was the 2002 NIC for Diesel Exhaust Particulate, as elemental carbon withdrawn?
Diesel Exhaust Particulate was on the 2002 Notice of Intended Changes (NIC) with a proposed TLV of 0.02 mg/m3 respirable particulate, and an A2 carcinogenicity notation. That same year (2002), the EPA released a large publication concerning diesel fuel exhaust (available at http://cfpub.epa.gov/ncea/cfm/recordisplay.cfm?deid=29060) and we had received many comments from outside parties regarding our NIC for Diesel Exhaust Particulate. Based on this information, the Threshold Limit Values for Chemical Substances (TLV-CS) Committee determined that the draft NIC Documentation for Diesel Exhaust Particulate, as elemental carbon, was in need of substantial revision. It was withdrawn from the 2002 Notice of Intended Changes (NIC). At this time there are no ACGIH values for Diesel Exhaust. Please refer to the TLV/BEI Development Process for further information on the timeline and information flow that the Threshold Limit Values for Chemical Substances (TLV-CS) Committee follows when setting T
