What is the reason for screening all vents and overflows on storage tanks?

Screening all vents and overflows on storage tanks is primarily done to prevent contamination. Storage tanks are often used to hold water or other liquids, and unfiltered access points can allow debris, pests, or microorganisms to enter the tank. Contaminants can lead to water quality issues, which are critical for public health and safety.

By implementing screens on these access points, operators create a barrier that helps keep unwanted materials out, ensuring that the stored liquid remains clean and safe for consumption or other uses. This practice is a fundamental aspect of maintaining water quality standards and protecting the integrity of the stored liquid in various applications.