TLVs® and BEIs®
Based on the documentation of the Threshold Limit Values for Chemical Substances and Physical Agents & Biological Exposure Indices
TABLE OF CONTENTS
- Policy Statement on the Uses of TLVs and BEIs
- Statement of Position Regarding the TLVs and BEIs
- TLV/BEI Development Process: An Overview
- Online TLV and BEI Resources
- Revisions or Additions for 2024
- Chemical Substances
- Committee Members
- Introduction
- General Information
- Definition of the TLVs
- Peak Exposures
- TWA and STEL versus Ceiling (C)
- Mixtures
- Deviations in Work Conditions and Work Schedules
- Application of TLVs to Unusual Ambient Conditions
- Unusual Work Schedules
- TLV Units
- User Information
- References and Selected Readings
- Adopted Threshold Limit Values
- ۲۰۲۴ Notice of Intended Changes
- Chemical Substances and Other Issues Under Study
- Definitions and Notations
- Adopted Appendices
- A. Carcinogenicity
- B. Particles (insoluble or poorly soluble) Not Otherwise Specified (PNOS)
- C. Particle Size-Selective Sampling Criteria for Airborne Particulate Matter
- D. Commercially Important Tree Species Suspected
- of Inducing Sensitization
- E. Threshold Limit Values for Mixtures
- F. Minimal Oxygen Content
- G. Substances Whose Adopted Documentation and TLVs Were Withdrawn for a Variety of Reasons, Including
- Insufficient Data, Regrouping, etc
- H. Reciprocal Calculation Method for Certain Refined Hydrocarbon Solvent Vapor Mixtures
- Biological Exposure Indices
- Committee Members
- Introduction
- Adopted Biological Exposure Determinants
- ۲۰۲۴ Notice of Intended Changes
- Chemical Substances and Other Issues Under Study
- Physical Agents
- Committee Members
- Introduction
- Threshold Limit Values
- Acoustic
- Infrasound and Low-Frequency Sound
- Audible Sound
- Ultrasound
- Electromagnetic Fields 0–۳۰۰ GHz
- Electromagnetic Radiation Spectrum and Related TLVs
- Static Magnetic Fields
- Sub-Radiofrequency (30 kHz and below) Magnetic Fields
- Sub-Radiofrequency (30 kHz and below) and Static Electric Fields
- Radiofrequency/Microwave Radiation
- Optical Radiation
- Light and Near-Infrared Radiation
- Ultraviolet Radiation
- Lasers
- Ionizing Radiation
- Ergonomics
- Statement on Work-Related Musculoskeletal Disorders
- Hand Activity
- Lifting
- Above Shoulder Work
- Hand-Arm Vibration
- Upper Limb Localized Fatigue
- Whole-Body Vibration
- Push-Pull
- Thermal Stress
- Cold Stress
- Heat Stress and Strain
- Physical Agents Under Study
- Appendix A: Statement on the Occupational Health Aspects of New Lighting Technologies – Circadian, Neuroendocrine, and Neurobehavioral Effects of Light
- Appendix B: Personal Physiologic Monitoring in the Workplace
- Appendix C: Statement on Fatigue and Its Management in the Workplace
- Biological Agents
- Committee Members
- Introduction
- Biological Agents Under Study
- CAS Number Index
- Endnotes and Abbreviations
INTRODUCTION TO THE CHEMICAL SUBSTANCES
General Information
The TLVs are guidelines to be used by professional industrial hygienists. The values presented in this book are intended for use only as guidelines or recommendations to assist in the evaluation and control of potential workplace health hazards and for no other use (e.g., neither for evaluating or controlling community air pollution; nor for estimating the toxic potential of continuous, uninterrupted exposures or other extended work periods; nor for proving or disproving an existing disease or physical condition in an individual). Further, these values are not fine lines between safe and dangerous conditions and should not be used by anyone who is not trained in the discipline of industrial hygiene. TLVs are not regulatory or consensus standards.
Editor’s note: The approximate year that the current Documentation was last substantially reviewed and, where necessary, updated may be found following the CAS number for each of the adopted entries in the alphabetical listing, e.g., Chromium [7440-47-3] and inorganic compounds (2017). The reader is advised to refer to the “TLV Chronology” section in each Documentation for a brief history of the TLV recommendations and notations.
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