Safety, Regulations, and Recordkeeping
Staying safe and compliant
Safety questions test hazard recognition and correct response. Know confined-space entry (permit-required, atmospheric testing for oxygen, H2S, and combustibles, attendant and rescue plan), lockout/tagout, hazard communication, personal protective equipment, and chemical handling (chlorine gas, sodium hypochlorite, acids, and caustics). Understand chlorine gas hazards and the use of SCBA and leak response. Know electrical safety and fall protection basics.
Regulations and records
Understand the regulatory framework: the Safe Drinking Water Act and Clean Water Act, NPDES permits, primacy agencies, monitoring and reporting requirements, public notification for violations, and operator certification requirements. Know that records must be accurate, legible, and retained per the permit; falsification is a serious violation.
Traps
A classic trap: entering a manhole without testing the atmosphere or a permit. Another: assuming a violation can be handled quietly; public notice requirements are triggered by certain violations. Watch for questions that confuse drinking water rules with wastewater permit rules.
Rule of thumb
Test the atmosphere before entry, never enter alone, and always have an attendant with rescue capability. For records, if it isn't documented, it didn't happen.