(1) Purpose. The purpose of this section is to identify metals of concern to be addressed under this chapter. The metals of concern category was established as an interim category pending completion of EPA's inorganic metals assessment framework process.

(2) Metals of concern. Ecology has identified the following metals of concern based on a determination that these metals pose threats to human health and the environment in Washington.

(3) Actions. Ecology may prepare chemical action plans for one or more metals of concern using the process defined in WAC 173-333-420.

(4) Revising the metals of concern list. Ecology will evaluate the relationship between the metals of concern list and PBT list in WAC 173-333-310 following the completion of the EPA's inorganic metals assessment framework process.