The required separation distance from contaminant sources for mechanical and gravity intakes is measured from which part of an area?

The required separation distance from contaminant sources for mechanical and gravity intakes is measured from the closest edge of those contaminant sources. This measurement is crucial to ensure that the air or fluids being drawn into the system are free from pollution and undesirable contaminants. By using the closest edge, regulations aim to reduce the risk of unintended exposure to harmful substances that may be present in the vicinity of the intake. This practice helps ensure the safety and health standards are maintained, promoting a cleaner and more efficient operation of mechanical systems. In contrast, measuring from other points like the center of a street or the farthest edge would not adequately protect against the influences of nearby contaminants.