Threshold Limit Value 02 (TLV)
Threshold Limit Value 02 (TLV) : (a) The maximum permissible concentration of a material, generally expressed in parts per million in air for some defined period of time (often 8 hours). These values, which may differ from country to country, are often backed up by regulation and therefore may be legally enforceable. [Oxford University, 2000 - Chemical Safety Information Glossary]; (b) The TLV_C (ceiling exposure limit) is an exposure limit which should not be exceeded under any circumstances. [Oxford University, 2000 - Chemical Safety Information Glossary]
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