CEP Environmental Risk Assessment & Management 2 — Questions and Answers
Question 1: Which risk assessment methodology uses probability-consequence matrices to prioritize environmental risks?
- Life Cycle Assessment
- Risk Ranking and Filtering (Correct answer)
- Environmental Impact Assessment
- Material Flow Analysis
Correct answer: Risk Ranking and Filtering
Risk Ranking and Filtering (RRF) uses probability-consequence matrices to systematically compare and prioritize environmental risks.
Question 2: Under CERCLA, the 'potentially responsible party' (PRP) liability standard is best described as:
- Negligence-based and divisible
- Strict, joint, and several (Correct answer)
- Proportional to contamination contribution
- Limited to current site owners
Correct answer: Strict, joint, and several
CERCLA imposes strict, joint, and several liability on PRPs, meaning any one party can be held responsible for total cleanup costs regardless of fault.
Question 3: A company discovers trichloroethylene (TCE) contamination in groundwater beneath its facility. The FIRST step in environmental risk management should be:
- Immediate site closure and evacuation
- Notification of regulatory authorities and receptor assessment (Correct answer)
- Installation of pump-and-treat remediation
- Commissioning a full Phase II ESA
Correct answer: Notification of regulatory authorities and receptor assessment
Notifying regulators and assessing potential receptors is the first step to understand exposure pathways and legal obligations before selecting remediation.
Question 4: The concept of 'risk transfer' in environmental risk management most commonly involves:
- Moving contaminated soil off-site
- Purchasing environmental liability insurance (Correct answer)
- Transferring regulatory permits to a new owner
- Delegating remediation to a contractor
Correct answer: Purchasing environmental liability insurance
Risk transfer in environmental management typically refers to shifting financial exposure through instruments like environmental liability insurance policies.
Question 5: What is the primary purpose of a Conceptual Site Model (CSM) in environmental risk assessment?
- Calculating cleanup costs
- Visualizing contaminant sources, pathways, and receptors (Correct answer)
- Designing remediation systems
- Estimating property devaluation
Correct answer: Visualizing contaminant sources, pathways, and receptors
A CSM graphically represents the relationships between contamination sources, transport pathways, and potential human or ecological receptors to guide risk assessment.
Question 6: Which exposure route typically dominates risk calculations for volatile organic compounds (VOCs) in indoor air from subsurface contamination?
- Dermal absorption from soil contact
- Ingestion of contaminated groundwater
- Inhalation of vapor intrusion (Correct answer)
- Direct contact with free-phase product
Correct answer: Inhalation of vapor intrusion
Vapor intrusion—where VOCs migrate from subsurface soil or groundwater into indoor air—is typically the dominant inhalation exposure route for VOC contamination.
Question 7: In ecological risk assessment, the 'assessment endpoint' differs from the 'measurement endpoint' in that:
- Assessment endpoints are quantitative; measurement endpoints are qualitative
- Assessment endpoints define what to protect; measurement endpoints are observable metrics used to evaluate protection (Correct answer)
- Measurement endpoints are set by regulators; assessment endpoints are chosen by the assessor
- Assessment endpoints apply only to human health; measurement endpoints apply to ecosystems
Correct answer: Assessment endpoints define what to protect; measurement endpoints are observable metrics used to evaluate protection
Assessment endpoints define the valued ecological entity and its attribute to be protected, while measurement endpoints are measurable surrogates used to evaluate whether that protection is achieved.
CEP Environmental Risk Assessment & Management 2
Which risk assessment methodology uses probability-consequence matrices to prioritize environmental risks?