CPII Safety & Environmental Compliance 4 â Questions and Answers
Question 1: A water main replacement project generates excavated soil with elevated lead concentrations. Under RCRA, what is the first step to determine proper disposal?
- Dispose at the nearest municipal landfill immediately
- Conduct a hazardous waste determination through characterization or knowledge (Correct answer)
- Apply for an EPA variance to dispose as solid waste
- Blend the soil with clean fill to reduce concentrations
Correct answer: Conduct a hazardous waste determination through characterization or knowledge
RCRA requires a hazardous waste determinationâthrough sampling/analysis or process knowledgeâbefore any waste material can be properly classified and disposed of.
Question 2: What personal protective equipment (PPE) hierarchy principle should an infrastructure inspector apply when evaluating worker safety controls on a project?
- PPE should always be the first control selected as it is most effective
- Engineering controls, then administrative controls, then PPE as last resort (Correct answer)
- Administrative controls first, PPE second, engineering controls last
- PPE and engineering controls are equally preferred and interchangeable
Correct answer: Engineering controls, then administrative controls, then PPE as last resort
OSHA's hierarchy of controls prioritizes elimination, substitution, engineering controls, administrative controls, and PPE in that orderâPPE is always the last line of defense.
Question 3: Under the Endangered Species Act (ESA), what must a federal agency do when a proposed infrastructure project may affect a listed threatened or endangered species?
- Proceed with construction and monitor species impact after completion
- Conduct formal or informal consultation with the U.S. Fish and Wildlife Service (Correct answer)
- Obtain a Section 404 permit and proceed without further review
- Relocate the species to an alternative habitat before construction
Correct answer: Conduct formal or informal consultation with the U.S. Fish and Wildlife Service
Section 7 of the ESA requires federal agencies to consult with USFWS or NMFS to ensure their actions do not jeopardize listed species or destroy critical habitat.
Question 4: An inspector finds active asbestos-containing material (ACM) disturbed during a water line replacement in a building built in 1975. Which EPA regulation governs notification and work practice requirements?
- OSHA 29 CFR 1926.1101
- EPA NESHAP 40 CFR Part 61 Subpart M (Correct answer)
- TSCA Title II
- Clean Air Act Section 112
Correct answer: EPA NESHAP 40 CFR Part 61 Subpart M
EPA's National Emission Standard for Hazardous Air Pollutants (NESHAP) for asbestos at 40 CFR Part 61 Subpart M requires notification and work practice standards during demolition and renovation.
Question 5: A trench 6 feet deep in Type C soil must be sloped to prevent cave-in. What is the minimum allowable slope ratio for Type C soil per OSHA standards?
- 3/4:1 (H:V)
- 1:1 (H:V)
- 1½:1 (H:V) (Correct answer)
- 2:1 (H:V)
Correct answer: 1½:1 (H:V)
OSHA requires Type C soilâthe least stable classificationâto be sloped at a minimum ratio of 1½ horizontal to 1 vertical (1½:1).
Question 6: What does the term 'IDLH' stand for in the context of confined space atmospheric monitoring during infrastructure inspections?
- Immediately Dangerous to Life or Health (Correct answer)
- Initial Detection Level for Hazards
- Integrated Daily Limit for Hazardous materials
- Intermittent Dose Level for Health
Correct answer: Immediately Dangerous to Life or Health
IDLH stands for Immediately Dangerous to Life or Health, representing the maximum airborne concentration from which a worker can escape without irreversible health effects.
Question 7: During inspection of a fuel storage facility at a public works yard, an inspector identifies secondary containment that can hold only 90% of the largest tank's capacity. What is the standard secondary containment requirement?
- 100% of the smallest tank plus 10% freeboard
- 110% of the largest tank capacity (Correct answer)
- 150% of the average tank volume on-site
- 50% of the total aggregate storage volume
Correct answer: 110% of the largest tank capacity
EPA's SPCC regulations at 40 CFR Part 112 require secondary containment to hold at least 110% of the largest single tank's capacity.
CPII Safety & Environmental Compliance 4
A water main replacement project generates excavated soil with elevated lead concentrations.
Under RCRA, what is the first step to determine proper disposal?