Terrestrial Ecological Evaluation Process- Exclusion #2


Exposure Pathway Analysis - Incomplete Pathway

The analysis requires the user to identify physical barriers, including planned future barriers, at the site that will prevent plants or wildlife from being exposed to soil contamination.  

CRITERIA:

No further evaluation is required if all soil contaminated with hazardous substances is, or will be, covered by buildings, paved roads, pavement, or other physical barriers that will prevent plants or wildlife from being exposed.    

  An Institutional control is required to ensure the long-term maintenance of the physical barriers that prevent exposure to soil contamination.  The requirements and procedures for establishing institutional controls are specified in WAC 173-340-440.

  If the demonstration is based on planned future land-use, then a completion date for such future development that is acceptable to the department is also required.  If land-use assumptions used in the TEE are not accomplished by that completion date, the site must be reevaluated using existing land-use conditions.

  A PDF form is available for documenting your decision-making. Picture Depicting Documentation

 Here you may view an HTML version of the form

RATIONALE:

EVEN IF soil is contaminated at the point of compliance, if all soil contamination is, or will be, covered by buildings, paved roads, pavement, or other physical barriers, then the soil contamination is not likely to pose a threat to plants and wildlife because the receptors are not likely to be exposed to the contamination.

REFERENCE:

WAC 173-340-7491(1)(b).

Please contact David Sternberg if you have any questions or comments about the TEE web pages.

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