022009CSTLVs_Introduction.pdf

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022009CSTLVs_Introduction

2009 Threshold Limit Values for Chemical Substances in the Work Environment Adopted by ACGIH ? with Intended Changes Contents Committee Members 2 Introduction3 General Information3 Definition of the TLVs? 3 Types of TLVs? 4 Excursion Limits5 TWA and STEL versus Ceiling (C)5 Mixtures6 Deviation in Work Conditions and Work Schedules6 Application of TLVs? to Unusual Ambient Conditions 6 Unusual Work Schedules 7 TLV? Units 8 User Information 8 References and Selected Readings 9 Adopted Threshold Limit Values10 2009 Notice of Intended Changes62 Chemical Substances and Other Issues Under Study 65 Definitions and Notations67 Adopted Appendices A. Carcinogenicity 73 B. Particles (insoluble or poorly soluble) Not Otherwise Specified [PNOS] 74 C. Particle Size-Selective Sampling Criteria for Airborne Particulate Matter74 D. Commercially Important Tree Species Suspected of Inducing Sensitization77 E. Threshold Limit Values for Mixtures 78 F. Minimal Oxygen Content 81 G. Substances Whose Adopted Documentation and TLVs? Were Withdrawn for a Variety of Reasons, Including Insufficient Data, Regrouping, Etc. 86 H. Reciprocal Calculation Method for Certain Refined Hydrocarbon Solvent Vapors89 T L V ? – C S 2 — Members T L V ? – C S 2008 TLV? CHEMICAL SUBSTANCES COMMITTEE Terry Gordon, PhD — Chair Robert Spirtas, DrPH — Vice Chair William S. Beckett, MD, MPH Philip L. Bigelow, PhD, CIH, ROH Dennis M. Casserly, PhD, CIH B. Dwight Culver, MD Alison C. Elder, PhD Deborah C. Glass, PhD, MA, MSc Ian A. Greaves, MD Gregory L. Kedderis, PhD Gerald L. Kennedy, Jr., DABT David A. Macys, MS, CIH, DABT David C. May, ScD, CIH, PE James N. McDougal, PhD Bruce Naumann, PhD, DABT Rachel Rubin, MD, MPH Darius D. Sivin, PhD Elizabeth K. Weisburger, ScD, PhD W.H. (Bill) Wells, Jr., PhD, CIH, CSP ACGIH? also appreciates the contributions of the following individual: Aleksandr B. Stefaniak — ACGIH? Bloomfield Awardee Help ensure the continued development of TLVs ? and BEIs ? . Make a tax deductible d

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