Final answer:
Nonswimmers should be separated from swimmers by a barrier at waterfront facilities to ensure safety, with 'no diving' signs in shallow areas to prevent injuries. Pool water must be carefully maintained for health and comfort.
Step-by-step explanation:
At waterfront facilities using swim tests for group visits, areas for nonswimmers should be separated from the swimmer area with a continuous barrier, such as a pier or buoyed lifeline. This is because it is crucial to ensure the safety of individuals who are not proficient in swimming. Mixing nonswimmer areas with swimmer areas without a clear physical boundary can lead to accidental entry into deeper water, which increases the risk of drowning, especially for nonswimmers.
No diving signs are extremely important. They remind us that diving in shallow water is dangerous and can cause severe injuries to the nervous system. For safety, designated deep water areas are typically reserved for diving because they can accommodate the depth required to dive safely without risk of injury.
It is advisable to carefully maintain the relative amounts of substances in pool water to ensure health and comfort for all users. The mixture of substances in a swimming pool, such as chlorine levels and pH, needs to be balanced to prevent health problems and provide an enjoyable swimming experience.