Threshold Limit Value 04 (TLV) : A term used to express the airborne concentration of a material to which nearly all persons can be exposed day after day, without adverse effects
The Association of Petrochemicals Producers in Europe (APPE), The European petrochemical industry, Glossary of Terms on Chemical Safety for Use in IPCS Publications, van Nieuwenhuyse, Brussels 2006. http://www.petrochemistry.eu/glossary.html, (Petrochem Ind - Brit) {473}