Environmental Hazards & Risk Assessment Flashcards
7 cards from real Environmental Compliance Inspector practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Environmental Hazards & Risk Assessment flashcards as text
Under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), which party is generally NOT held liable for cleanup costs at a contaminated site?
Answer: Innocent landowner who had no knowledge of contamination
CERCLA's innocent landowner defense protects buyers who conducted all appropriate inquiries and had no knowledge of contamination at the time of purchase.
A risk assessor calculates a Hazard Quotient (HQ) of 2.5 for a non-carcinogenic chemical at a site. What does this value indicate?
Answer: The exposure exceeds the reference dose by 2.5 times, indicating potential concern
An HQ greater than 1.0 indicates that exposure exceeds the reference dose and warrants concern for non-carcinogenic health effects.
Which exposure pathway is typically the PRIMARY concern for volatile organic compounds (VOCs) in contaminated groundwater beneath a residential property?
Answer: Vapor intrusion into indoor air
VOCs can volatilize from contaminated groundwater and migrate through soil into building foundations, making vapor intrusion the dominant exposure pathway.
During a Phase I Environmental Site Assessment, which of the following would be considered a 'Recognized Environmental Condition' (REC)?
Answer: An abandoned underground storage tank with no known release
An abandoned UST with no known release qualifies as a REC because it represents a potential release that may have occurred but has not been confirmed or ruled out.
The EPA's Toxics Release Inventory (TRI) program requires facilities to report releases of listed chemicals when they exceed certain thresholds. Which sector is generally subject to TRI reporting?
Answer: Manufacturing facilities that use listed chemicals above threshold quantities
TRI reporting applies primarily to manufacturing and other specified industries that manufacture, process, or otherwise use listed toxic chemicals above threshold quantities.
In the context of ecological risk assessment, what does the term 'assessment endpoint' refer to?
Answer: An explicit expression of the environmental value to be protected and its attributes
Assessment endpoints define what ecological values (e.g., survival of fish species) need to be protected and guide the entire risk assessment process.
Which of the following best describes a 'hot spot' in the context of environmental site characterization?
Answer: A localized area with contaminant concentrations significantly higher than background
A hot spot is a discrete area where contaminant concentrations are substantially elevated compared to surrounding areas or background levels.