CPWM Hazardous Waste Management 4 — Questions and Answers
Question 1: Under DOT regulations (49 CFR), which hazard class covers flammable liquids when shipped as hazardous materials?
- Class 2
- Class 3 (Correct answer)
- Class 4
- Class 8
Correct answer: Class 3
DOT Class 3 covers flammable liquids with a flash point at or below 60°C (140°F).
Question 2: What OSHA standard requires employers to train workers on hazardous chemicals in the workplace and provide Safety Data Sheets?
- 29 CFR 1910.120 (HAZWOPER)
- 29 CFR 1910.1200 (Hazard Communication) (Correct answer)
- 29 CFR 1910.134 (Respiratory Protection)
- 29 CFR 1910.146 (Permit-Required Confined Space)
Correct answer: 29 CFR 1910.1200 (Hazard Communication)
OSHA's Hazard Communication Standard (HazCom/GHS) requires SDS access and employee training on chemical hazards.
Question 3: Which OSHA standard specifically governs worker health and safety during hazardous waste operations and emergency response activities?
- 29 CFR 1910.1200
- 29 CFR 1910.120 (HAZWOPER) (Correct answer)
- 29 CFR 1926.65
- 29 CFR 1910.119
Correct answer: 29 CFR 1910.120 (HAZWOPER)
HAZWOPER (29 CFR 1910.120) sets training, PPE, medical surveillance, and site safety plan requirements for hazardous waste workers.
Question 4: Under HAZWOPER, how many hours of initial training are required for workers who will be on-site during hazardous waste operations (not just occasional visitors)?
- 8 hours
- 16 hours
- 24 hours
- 40 hours (Correct answer)
Correct answer: 40 hours
General site workers involved in hazardous waste operations must complete 40 hours of initial off-site training plus 3 days of supervised field experience.
Question 5: A waste passes the TCLP for arsenic at 3.5 mg/L. The regulatory threshold is 5.0 mg/L. What is the correct determination?
- The waste is hazardous by toxicity characteristic
- The waste is not hazardous by toxicity characteristic for arsenic (Correct answer)
- Additional TCLP testing must be performed
- The waste requires P-listing review
Correct answer: The waste is not hazardous by toxicity characteristic for arsenic
A TCLP result below the regulatory threshold (5.0 mg/L for arsenic) means the waste does not exhibit the toxicity characteristic for that constituent.
Question 6: Which EPA program addresses cleanup of abandoned or uncontrolled hazardous waste sites using Superfund money?
- RCRA Corrective Action
- CERCLA/Superfund (Correct answer)
- EPCRA Title III
- Clean Air Act NESHAP
Correct answer: CERCLA/Superfund
CERCLA (Superfund) provides EPA authority and funding to clean up abandoned hazardous substance sites posing threats to public health.
Question 7: What is the primary advantage of using a permitted hazardous waste incinerator over a landfill for certain wastes?
- Lower cost per ton of waste destroyed
- Destruction of organic hazardous constituents rather than containment (Correct answer)
- Elimination of all air permit requirements
- Avoidance of land disposal restriction standards
Correct answer: Destruction of organic hazardous constituents rather than containment
Incineration at high temperatures destroys organic hazardous constituents, whereas landfills only contain them.
CPWM Hazardous Waste Management 4
Under DOT regulations (49 CFR), which hazard class covers flammable liquids when shipped as hazardous materials?