This week, OSHA posted an LOI regarding terms used in the PSM Standard, and this LOI has generated some discussions amongst some SAFTENG members, most notably…
How are we required to document our HAZLOCs?
In OSHA’s LOI, it referenced 1910.307 Hazardous Locations standard which simply states: (emphasis by me)
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1910.307(b) Documentation All areas designated as hazardous (classified) locations under the Class and Zone system and areas designated under the Class and Division system established after August 13, 2007 shall be properly documented. This documentation shall be available to those authorized to design, install, inspect, maintain, or operate electric equipment at the location. |
My HAZLOC RAGAGEPs have always been NFPA 497 and NFPA 70. However, we should view 497 as more of a workbook (and the best one available) for DEFINING and QUANTIFYING our HAZLOCs. It does not specify the means by which these HAZLOCs have to be documented. But I have ALWAYS included the Figures from Chapter 5 in my PSI/Documentation, as these Figures/Diagrams do an excellent job depicting the VERTICAL and HORIZONTAL distances for my HAZLOC. CLICK HERE to view NFPA 497 and its figures/Diagrams. SAFTENG Members can see one of these figures below; it is from my training courses on Process Safety and Flammable Liquids/Gas Safety…