What is the capacity requirement for a mobile establishment’s wastewater tank relative to the supply tank?

The correct option indicates that the capacity requirement for a mobile establishment’s wastewater tank must be 15% larger than the supply tank. This requirement is crucial in ensuring that the system can effectively manage waste generated during operations without risking overflow or contamination. A larger wastewater tank helps accommodate unexpected increases in wastewater due to spills, equipment cleaning, or other unanticipated increases in liquid waste generation, thereby maintaining sanitary conditions.

This sizing requirement also ensures compliance with health and safety regulations, which are in place to protect both public health and the environment. The specific percentage is derived from practical experience and regulatory guidelines that aim to provide a safety margin in the capacity of waste handling systems.