Documents Overview

We will do our best to provide you with useful documentation for your projects. In addition, we will provide you with other industry documents and links that may be of interest. Check back often as content will change.

Helpful Links

Washington State Department of Ecology - Model Toxic Control Act (MTCA)
Note: Method A Values can be found on pp. 259 (printed) and pp. 231 (Acrobat)

You can also use Washington State Department of Ecologys - Cleanup Levels and Risk Calculations (CLARC)
database to research MTCA Method A values and calculations. This database can be found here.