Dioxin Cleanup

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Dioxin Cleanup

Dioxin cleanup levels for soil, shown by U.S. state. Data was compiled in tables organized alphabetically by state within U.S. EPA Regions 1 through 10. See attached PDF (top-right of page) for details.

 

These Regional tables presented on the following pages include:

 

  • State: using the standard abbreviations.
  • Soil concentration: as ppt to facilitate comparisons (several were converted to this unit).
  • Date: as month-year where available (to help indicate timing per the extant OSWER
    directive, as well as recent scientific studies and harmonization efforts).
  • Endpoint basis: cancer (c) or noncancer (n).
  • Type of toxicity reference value: such as SF (slope factor) or RfD (reference dose).
  • Toxicity value units: as consistent unit: (mg/kg/d)-1 (or mg/kg-d for noncancer endpoint), to facilitate comparisons.
  • Information source: streamlined reference (for quick indication of the nature of this source, e.g., state agency or other), with weblink to facilitate direct checks.
  • Context notes: to indicate, where available:
    • contaminant addressed – TCDD or toxic equivalents (TEQ);
    • land use scenario – e.g., unrestricted or commercial/industrial;
    • name of the value – e.g., cleanup level, or screening or comparison level; and
    • application context.
  • Evaluation criteria: To highlight information relevant to the four criteria, as available.

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