Grounding electrically conductive objects like road tankers, railcars and drums prevents the accumulation of electrostatic charge by equalizing the object’s electrical potential with respect to earth. Without grounding, static charge can accumulate on equipment like the ones listed during filling or mixing processes. This accumulation of charge can create a voltage rise that exceeds the breakdown voltage of the surrounding atmosphere, potentially leading to a static discharge. If the discharge energy exceeds the minimum ignition energy (MIE) of a combustible atmosphere, ignition can occur.