Once adopted, the proposed regulations should lead to a flurry of regulatory activity, the focus of which will probably be a List of Suspect Carcinogens published by the National Institute for Occupational Safety and Health (NIOSK), numbering in excess of 2400 substances, and which has been growing at the rate of 100 substances a month.

Threshold Limit Values for Chemical Substances and Physical Agents in the Workroom Environment with Intended Changes for 1979 511904 0131 Copyright 1979 by American Conference of Govern mental Industrial Hygienists.

TLVs Threshold Limit Values for Chemical Substances and Physical Agents .

*V.

In this health area, the module leads OSHA.

PLAINTIFF'S EXHIBIT TLVs Threshold Limit Values for Chemical Substances and Physical Agents in the Workroom Environment with Intended Changes for 1977 v-'TVv-vjT" SC 162n LAM024913 Copyright 1977 by American Conference of Govern mental Industrial Hygienists.

To Frnm Tkodicti amd Chstuca/l PUT IT IN WRITING Date 28 April 1978 R- C.

fe>Hh/ &. pox TLVs Threshold Limit Values for Chemical Substances and Physical Agents in the Workroom Environment with Intended Changes for 1977 !

TLVs Threshold Limit Values for Chemical Substances and Physical Agents in the Workroom Environment with Intended Changes for 1978 !

& 2^ GrZC&G-E TLVs Threshold Limit Values for Chemical Substances and Physical Agents in the Workroom Environment with Intended Changes for 1977 C j?

FRIDAY, OCTOBER 5, 1973 WASHINGTON, D.C.

Vulcan Materials Company CHEMICALS DIVISION / P. 0.

Remarks: Lead Area At the present time, lead-in-air is monitored by air sampling equipment at various locations in the TEL-TML Areas.

1973 OSHA (XINCENTRAnON LJ Incorporating Infrared Analytical Data For Comj; Of the 400-odd gases and vapors for which maximum tolerable limits have been established by the Occupational Safety and Health Administration, many have char acteristic infrared absorption sufficiently strong to be detected and quantized by an Data for Ambient Air Analysis Using the MtRAN Gas Analyzer Compound Maximum Allan,.we Exposure* (8 Ham Weighted Avenge) PPM mg/M1 Minimum Absorbance equivalent to the Concentration OSHA Limit* which the Analytical MIRAN Analyzer | Scale Wavelength can detect Absorbance Expansion Pathlength AcetaldehydeAcetic Acid Acetic Anhydride Aceh,,-a Acetonitrile Acetylene Bichloride, see 1,2Dichloroethyiene Acetylene Tetrabromide Acrolein Acrylamide - Skin Acrylonitrile - Skin Afdrin - Skin Ally!

Ethyl Corp. has applied this technique, with byproduct HC] used to pro duce ethyl Chloride for manufacture of tetraethyl lead antiknock compounds.