Dioxin/Furan Toxicity Equivalency Factors

The DEQ uses the most current toxicity data, including toxicity equivalency factors (TEFs), as much as possible. Because of this, the DEQ requires dioxin/furan calculations for soil and water samples to use the World Health Organization (WHO) 2005 TEFs.

World Health Organization (WHO) Toxicity Equivalency Factors
Download Name	Link
2005 TEQ Dioxins/Furans Calculator for Soil and Water Samples	17 KB

Site Response Section (SRS)

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SRS Guides/Policies/Rules: Data Validation
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SRS References/Tools: Acronym List (PDF); APH VI Calculator; Circular DEQ-7 (PDF); Contracting Information; Dioxin/Furan TEQ; EPA RSLs (November 2011); Facility Ranking Form; Frequently Asked Questions; Links of Interest; Soil Background Metal
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