Which statement about P-List and U-List hazard designations is true?

Which statement about P-List and U-List hazard designations is true?

• A. P-List indicates nonhazardous waste
• B. U-List indicates acutely toxic waste
• C. Acute toxicity hazard is indicated by P-List
• D. P-List indicates low hazard

Answer: (C)

Understanding how P-list and U-list designations relate to hazard levels helps you handle waste correctly. P-list wastes are acutely hazardous, meaning they’re highly toxic in very small amounts and require stringent handling and disposal controls. U-list wastes are toxic in general and can pose health risks, but not primarily through acute toxicity—often involving chronic or systemic effects. So the statement that acute toxicity hazard is indicated by P-list is true. The other ideas don’t fit because P-list is not nonhazardous or low hazard, and U-list isn’t defined by acute toxicity in the same way.

Understanding how P-list and U-list designations relate to hazard levels helps you handle waste correctly. P-list wastes are acutely hazardous, meaning they’re highly toxic in very small amounts and require stringent handling and disposal controls. U-list wastes are toxic in general and can pose health risks, but not primarily through acute toxicity—often involving chronic or systemic effects. So the statement that acute toxicity hazard is indicated by P-list is true. The other ideas don’t fit because P-list is not nonhazardous or low hazard, and U-list isn’t defined by acute toxicity in the same way.