Facility Safety and Risk Management
Build the system, not just the signage
Aquatic risk management rests on four layers: design (depth markers, non-slip decks, anti-entrapment drain covers, dual drains or a safety vacuum release system), supervision (zones with no blind spots, adequate ratios, rotations), rules and signage (capacity, diving, health rules), and an Emergency Action Plan that is written, posted, rehearsed and reviewed after every use. Water clarity is a safety item, not cosmetics: if the main drain is not visible from the deck, close the pool.
Traps in exam questions
The 10/20 protection rule is frequently stated backwards. The widely used version is: recognize a swimmer in distress within about 10 seconds and be able to reach any point in the assigned zone within about 20 seconds - learn your facility's exact wording and never quote it reversed. Other traps: confusing certification with in-service training, assuming an EAP exists because a binder does, and missing the 30/30 lightning rule (suspend activity when thunder is heard or lightning seen, and wait 30 minutes after the last thunder).
Chemical and storage safety
Oxidizers (chlorine products) and acids must never be stored together or fed through the same equipment - a mixed spill produces chlorine gas. Store chemicals locked, ventilated, off the floor, labeled, with SDS sheets available.
Rule of thumb: if an activity cannot be supervised, stopped and rescued within the response time your plan promises, change the plan before you open the gate.