Agency for Toxic Substances and Disease Registry
Case Studies in Environmental Medicine (CSEM) 

Lead Toxicity
Appendix 1: Key to Acronyms/Abbreviations

CDC

Centers for Disease Control and Prevention

OSHA

Occupational Safety and Health Administration

NIOSH

National Institute for Occupational Safety and Health

ACGIH

American Conference of Governmental Industrial Hygienists

EPA

Environmental Protection Agency

FDA

Food and Drug Administration

CPSC

Consumer Product Safety Commission

PEL

Permissible Exposure Limit

REL

Recommended Exposure Limit

TLV/TWA

Threshold Limit Value/Time-Weighted Average

NAAQS

National Ambient Air Quality Standard

MCLG

Maximum Contaminant Level Goal