Ruggles, now equipment manager for J.M. Marschuetz, urged fleet professionals to create an Activity Hazard Analysis (AHA), sometimes called a Job Hazards Analysis (JHA). Such a document focuses on a ...

Chapter 7 deals specifically with Dust Hazard Analysis and section 7.2.3, Layer Depth Criteria Method suggests immediate cleaning occurs when dust accumulations reach 1/32 inch-thickness ...