CES Soil Contamination & Remediation 1 — Questions and Answers
Question 1: What is a Phase I Environmental Site Assessment (ESA)?
- A record review and site inspection to identify potential environmental contamination liabilities without soil or water sampling (Correct answer)
- A comprehensive soil and groundwater sampling program
- A regulatory audit conducted by the EPA
- A construction inspection during building demolition
Correct answer: A record review and site inspection to identify potential environmental contamination liabilities without soil or water sampling
A Phase I ESA involves reviewing historical records, conducting site inspections, and interviewing knowledgeable parties to identify recognized environmental conditions (RECs) without invasive testing.
Question 2: What is bioremediation?
- Using microorganisms to break down or transform environmental contaminants into less harmful substances (Correct answer)
- Removing contaminated soil and transporting it to a landfill
- Using concrete to cap contaminated areas
- Pumping contaminated groundwater to a treatment plant
Correct answer: Using microorganisms to break down or transform environmental contaminants into less harmful substances
Bioremediation harnesses naturally occurring or enhanced microbial processes to degrade organic contaminants (petroleum, solvents) into harmless byproducts like carbon dioxide and water.
Question 3: What does the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) establish?
- The Superfund program for cleaning up uncontrolled hazardous waste sites and assigning liability (Correct answer)
- Standards for municipal solid waste landfills
- Air quality standards for industrial facilities
- Worker safety requirements in chemical plants
Correct answer: The Superfund program for cleaning up uncontrolled hazardous waste sites and assigning liability
CERCLA (1980), commonly known as Superfund, established a federal program to clean up abandoned or uncontrolled hazardous waste sites and created a liability framework for responsible parties to pay cleanup costs.
Question 4: What is 'monitored natural attenuation' as a remediation strategy?
- Allowing natural processes to reduce contaminant concentrations while monitoring progress over time (Correct answer)
- Actively pumping chemicals into contaminated soil
- Excavating all contaminated soil and replacing it
- Building a physical barrier around the contaminated site
Correct answer: Allowing natural processes to reduce contaminant concentrations while monitoring progress over time
Monitored natural attenuation relies on natural physical, chemical, and biological processes (dilution, sorption, biodegradation) to reduce contaminant levels, with regular monitoring to verify effectiveness.
Question 5: What is a Brownfield site?
- A property where reuse or redevelopment may be complicated by the presence or potential presence of contamination (Correct answer)
- A site designated as a national park
- Agricultural land converted to residential use
- A construction site with brown-colored soil
Correct answer: A property where reuse or redevelopment may be complicated by the presence or potential presence of contamination
EPA defines brownfields as real property where expansion, redevelopment, or reuse may be complicated by the presence or potential presence of hazardous substances, pollutants, or contaminants.
Question 6: What is the purpose of a risk assessment in contaminated site management?
- To evaluate whether contaminant levels pose unacceptable risks to human health or the environment and determine cleanup goals (Correct answer)
- To estimate the market value of contaminated property
- To assign blame for the contamination
- To calculate insurance premiums for property owners
Correct answer: To evaluate whether contaminant levels pose unacceptable risks to human health or the environment and determine cleanup goals
Risk assessment evaluates exposure pathways, toxicity data, and receptor populations to determine if contamination poses unacceptable risks and to establish cleanup levels that protect human health and the environment.
CES Soil Contamination & Remediation 1
What is a Phase I Environmental Site Assessment (ESA)?