CEA Risk Management & Environmental Impact 5 — Questions and Answers
Question 1: Which approach to risk communication is considered MOST effective for conveying low-probability, high-consequence environmental risks to the public?
- Presenting risks in terms of parts per billion to emphasize precision
- Comparing the risk to familiar everyday risks on the same scale (Correct answer)
- Providing only technical data and letting the audience draw conclusions
- Avoiding discussion of uncertainty to prevent public alarm
Correct answer: Comparing the risk to familiar everyday risks on the same scale
Comparative risk communication places an unfamiliar risk alongside familiar benchmarks (e.g., lifetime cancer risk from smoking), making abstract probabilities more comprehensible.
Question 2: What distinguishes a 'recognized environmental condition' (REC) from a 'historical recognized environmental condition' (HREC) in an ASTM Phase I ESA?
- RECs involve regulatory agency involvement; HRECs do not
- HRECs have been remediated to current standards; RECs have not been addressed
- RECs are current conditions; HRECs are past conditions now resolved to regulatory satisfaction (Correct answer)
- HRECs require Phase II investigation; RECs do not
Correct answer: RECs are current conditions; HRECs are past conditions now resolved to regulatory satisfaction
A HREC is a past REC that has been remediated to the satisfaction of the applicable regulatory authority with no further action required, whereas a REC represents an unresolved potential liability.
Question 3: Under OSHA's Process Safety Management (PSM) standard, which element requires facilities to analyze potential failure modes and their consequences for highly hazardous chemical processes?
- Management of Change (MOC)
- Process Hazard Analysis (PHA) (Correct answer)
- Pre-Startup Safety Review (PSSR)
- Mechanical Integrity Program
Correct answer: Process Hazard Analysis (PHA)
Process Hazard Analysis (PHA) systematically identifies, evaluates, and documents process hazards using methods such as HAZOP, What-If, or FMEA.
Question 4: Which remediation technology uses electrical current to move ionic contaminants through soil toward collection electrodes, and is particularly suited to fine-grained soils?
- Soil Vapor Extraction (SVE)
- Electrokinetic Remediation (Correct answer)
- In Situ Chemical Oxidation (ISCO)
- Permeable Reactive Barrier (PRB)
Correct answer: Electrokinetic Remediation
Electrokinetic remediation applies a low-level direct current to move charged contaminants (heavy metals, some organics) through low-permeability soils where pump-and-treat is ineffective.
Question 5: A risk auditor reviewing a facility's Risk Management Plan (RMP) under CAA Section 112(r) finds the worst-case scenario analysis uses incorrect meteorological data. This finding most directly affects which program element?
- Emergency response plan coordination with local authorities
- Offsite consequence analysis accuracy for regulatory reporting (Correct answer)
- Prevention program equipment inspection frequency
- Management of change documentation requirements
Correct answer: Offsite consequence analysis accuracy for regulatory reporting
Offsite consequence analysis (OCA) in the RMP relies on meteorological dispersion data to estimate toxic or flammable release endpoints; incorrect data invalidates the reported hazard zones.
Question 6: Which concept in environmental risk management refers to the principle that protective action should be taken when there is scientific uncertainty about potential serious or irreversible harm?
- As Low As Reasonably Achievable (ALARA)
- Polluter Pays Principle
- Precautionary Principle (Correct answer)
- Best Available Technology (BAT)
Correct answer: Precautionary Principle
The Precautionary Principle holds that lack of full scientific certainty should not be used as a reason to postpone protective measures when facing potential serious environmental harm.
Question 7: When auditing an underground storage tank (UST) facility, which combination of findings represents the HIGHEST environmental risk?
- Missing spill bucket combined with a tank age over 10 years
- No cathodic protection on a bare steel tank combined with a high water table and permeable soils (Correct answer)
- Expired registration combined with missing overfill protection
- Substandard release detection combined with an impermeable clay liner below the tank
Correct answer: No cathodic protection on a bare steel tank combined with a high water table and permeable soils
Bare steel tanks without cathodic protection corrode and leak; a high water table in permeable soils accelerates contaminant migration to groundwater, maximizing the likelihood and consequence of a release.
CEA Risk Management & Environmental Impact 5
Which approach to risk communication is considered MOST effective for conveying low-probability, high-consequence environmental risks to the public?