CPWM Waste Characterization and Classification 4

Question 1

What is the definition of 'mixed waste' in the context of U.S. waste classification?

Accepted Answer

Waste that is both RCRA hazardous and radioactive under the Atomic Energy Act

Answer

Mixed waste contains both RCRA-regulated hazardous constituents and radioactive material regulated under the Atomic Energy Act, falling under dual jurisdiction of EPA and NRC.

Question 2

Under the Land Disposal Restrictions (LDR) program, what must generators determine before disposing of hazardous waste?

Accepted Answer

Whether the waste meets treatment standards before land disposal

Answer

LDR (40 CFR Part 268) requires that hazardous wastes meet technology-based or concentration-based treatment standards before they can be placed in land disposal units.

Question 3

Which parameter is used in the RCRA reactivity characteristic to identify potentially explosive sulfide-bearing wastes?

Accepted Answer

Generation of toxic gases when exposed to water or acid

Answer

Under 40 CFR 261.23, reactivity includes wastes that react violently with water or generate toxic gases (including hydrogen sulfide from sulfides) when mixed with water or acids.

Question 4

What does 'delisting' a waste mean under RCRA?

Accepted Answer

Formally petitioning EPA to remove a specific waste from a hazardous waste listing

Answer

Delisting (40 CFR 260.20-260.22) allows a facility to petition EPA to exclude a specific waste from being listed hazardous based on facility-specific sampling and analysis showing it does not pose a hazard.

Question 5

Which waste category encompasses materials that are not solid wastes under RCRA because they are beneficially reused directly as raw materials?

Accepted Answer

Reclaimed materials used as raw material substitutes without prior use as waste

Answer

Materials that are reclaimed and directly reused as legitimate raw material substitutes without first being discarded are not considered solid wastes under the RCRA recycling exclusions (40 CFR 261.2).

(CPWM) Certified Professional in Waste Management Practice Test

(CPWM) Certified Professional in Waste Management Practice Test

CPWM Waste Characterization and Classification 4