EPA Guidance for Upper Confidence Limits at Hazardous Waste Sites
Summary
EPA has published guidance on applying upper confidence limits (UCL) at hazardous waste sites. The document, issued by EPA Region 1, addresses statistical methods for estimating upper bounds of contaminant concentrations when assessing cleanup actions. Site owners, contractors, and environmental consultants involved in Superfund and hazardous waste remediation should review the guidance to ensure statistical analyses meet EPA expectations.
What changed
EPA has issued guidance document EPA-R01-SFUND-2026-0430-0004 on upper confidence limits for hazardous waste site assessments. The guidance addresses statistical approaches for establishing upper bounds of contaminant concentrations when evaluating site remediation needs.\n\nAffected parties including site owners, environmental consultants, and remediation contractors should review the guidance to align their statistical practices with EPA expectations for hazardous waste site characterization and cleanup decisions.
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Apr 21, 2026GovPing captured this document from the original source. If the source has since changed or been removed, this is the text as it existed at that time.
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