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INTRODUCTION TO OCCUPATIONAL HEALTH |
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Federal Occupation Safety and Health Standards |
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The first compilation of health and safety standards, promulgated
by OSHA in
1970, was derived from the then-existing federal standards and national consensus
standards. Thus, many of the 1968 TLVs
established by the ACGIH became
federal standards or permissible
exposure limits (PELs). Also, certain workplace quality standards known as maximal
acceptable concentrations of the American National Standards Institute (ANSI) were
incorporated as federal health standards in 29 CFR 1910.1000 as national consensus
standards. These PEL values for general industry were subsequently updated in 1989. Unlike the TLVs, OSHA's PELs are enforceable by law. Employers must keep employee exposure levels below the PELs of regulated substances. As with TLVs, there are three types of PELs. The most common is the 8-hour Time-Weighted Average (TWA). The others are the Short-Term Exposure Limit (STEL) and the Ceiling Limit (C). |
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