"We classified the sources completely.....using the wrong standard."
Different standards (NFPA, IEC, API) can yield different source grades and zone extents for the same equipment. Without a clear upfront commitment to a methodology, teams end up redoing work or defending inconsistencies. See tips to address this and some other items from our workshop: 1: Systematically Identify All Potential Release Sources - Create a detailed source inventory by walking the unit with operations and maintenance staff. Grade each source (continuous, primary, secondary) based on how often and under what circumstances it releases. 2: Use Consistent Methodology and Document Your Assumptions - No matter what standard you use, commit to a single methodology for the study and document it upfront. Specify assumptions about release duration, wind direction, ventilation conditions, and cleanup practices. 3: Don't Forget Non-Equipment Sources - Maintenance, Sampling, and Operational Activities Hazardous areas aren't just around equipment; they're also around human activities.These activities often create larger or more unpredictable releases than normal equipment operation. Sign up for the next Hazardous Area Classification workshop or take free training modules on our Skool classroom