K004 Wastewater treatment sludge from the production of zinc yellow pigments

Wastewater treatment sludge from the production of zinc yellow pigments K005 Wastewater treatment sludge from the production of chrome green pigments

What this means

Federal rules list K004 Wastewater treatment sludge from the production of zinc yellow pigments as a hazardous substance, with the reporting threshold — called the reportable quantity, or RQ — shown above. If this much (or more) is spilled or released, it has to be reported to authorities. For regular chemicals and waste codes, that threshold is measured in pounds and kilograms. Knowing the RQ is one piece of hazmat compliance, not the whole picture — you'll still need to confirm the proper shipping name, packaging, and labeling separately.

How people use this record

• Check whether this material is on the federal hazardous substances list at all.
• Get the reporting threshold without digging through a 500-page PDF.
• Compare it to how much you actually have on hand or in a package.
• Use it as a starting point, then check the full Hazardous Materials Table for shipping requirements.