Environmental Compliance Inspector Cheat Sheet 2026

The 30 highest-yield Environmental Compliance Inspector facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. Which exposure pathway is typically the PRIMARY concern for volatile organic compounds (VOCs) in contaminated groundwater beneath a residential property? → Vapor intrusion into indoor air
2. Which of the following is considered a toxic pollutant under Section 307(a) of the Clean Water Act? → Mercury
3. What should be done if an inspection reveals an environmental violation? → Report the violation and recommend corrective actions.
4. A facility subject to Title V permitting must submit a compliance certification to the permitting authority at least: → Annually
5. Under the Clean Water Act, how frequently must a facility with an NPDES permit typically submit Discharge Monitoring Reports (DMRs)? → Monthly
6. Under the Risk Management Program (RMP) under CAA Section 112(r), which threshold for chlorine triggers Program 3 requirements? → 10,000 pounds
7. What is the maximum recommended holding time for nitrate samples preserved at 4°C before laboratory analysis? → 48 hours
8. Which federal regulation establishes National Emission Standards for Hazardous Air Pollutants (NESHAP)? → 40 CFR Part 63
9. What role does environmental monitoring play in risk assessment? → It helps track and reduce the impact of pollutants on the environment.
10. Under EPA's Interim Clean Water Act Settlement Penalty Policy, which factor is NOT typically considered when calculating a civil penalty? → The facility's stock price performance
11. Which regulation requires large quantity generators (LQGs) of hazardous waste to submit a biennial report to EPA? → RCRA Section 3002
12. A compliance inspector is reviewing a facility's spill prevention plan for aboveground storage tanks (ASTs). Which regulation requires this plan? → SPCC Rule under Clean Water Act Section 311 (40 CFR Part 112)
13. What is 'secondary containment' as required under RCRA and the Spill Prevention, Control, and Countermeasure (SPCC) rule? → Structures designed to contain spills or leaks from primary storage containers
14. Under 40 CFR Part 70 (Title V operating permits), facilities must submit a compliance certification: → Annually to the permitting authority
15. When an inspector discovers a significant environmental violation during a compliance evaluation, what document must be issued to formally notify the facility? → Notice of Violation (NOV)
16. What does 'free product' refer to in the context of a UST release investigation? → Liquid petroleum floating on the groundwater surface as a separate phase
17. What does the term 'de minimis' risk level typically represent in an EPA human health risk assessment? → A cancer risk of 1 in 1,000,000 or less
18. A Notice of Violation (NOV) issued by an environmental agency primarily serves to: → Formally inform the facility of alleged violations and initiate the enforcement process
19. What is the purpose of a Discharge Monitoring Report (DMR) submitted by a permitted facility? → To document self-monitored effluent data and demonstrate compliance with permit limits
20. How should an inspector handle discrepancies found during a follow-up inspection? → Document the discrepancy and recommend further corrective actions.
21. What should be done if hazardous materials are discovered during an inspection? → Alert the relevant authorities and ensure proper handling and removal.
22. Which federal statute gives the EPA authority to require cleanup of sites contaminated with hazardous substances and recover costs from responsible parties? → Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA)
23. When conducting a surprise inspection at an industrial facility, what is the inspector's first obligation upon arrival? → Present credentials and notify responsible facility personnel
24. Which agency division is typically responsible for referring criminal environmental cases to the Department of Justice? → EPA Criminal Investigation Division (CID)
25. Why is accurate documentation crucial in environmental compliance inspections? → To maintain records for compliance and accountability.
26. Under the Clean Air Act, which standard applies to hazardous air pollutants (HAPs) emitted by major sources? → Maximum Achievable Control Technology (MACT)
27. An inspector notices a field blank submitted with groundwater samples shows measurable VOC contamination. What is the correct interpretation? → Sample contamination occurred during collection or transport
28. Which sampling method is most appropriate for determining whether volatile organic compounds are present in groundwater at a monitoring well? → Low-flow purging with a peristaltic pump and zero-headspace vials
29. What is the maximum volume threshold that distinguishes a farm or residential UST from a regulated commercial UST under federal exemptions? → 1,100 gallons
30. Which Clean Air Act program requires major sources of air pollution to obtain permits that consolidate all applicable air quality requirements? → Title V Operating Permit Program