Tools & Resources

Assessing Risk / Establishing Cleanup Levels

Cleanup Levels and Risk Calculation (CLARC) searchable database

CLARC is a collection of technical information to assist in the development of cleanup levels at a site. Included are a searchable database that can be used to look up chemical-specific information, guidance documents, technical documentation, and other information that may be helpful in setting cleanup standards under the Model Toxics Control Act (MTCA).

Workbook Tools (revised December, 2007)

Tools for Calculating Soil and Ground Water Cleanup Levels under the Model Toxics Control Act (MTCA) Cleanup Regulation.

Troubleshooting instructions for compatibility with different versions of Microsoft Excel.

Notes on revision to Workbook tools:

December 2007: One change was made to the MTCATPH Workbook in December, 2007 to reflect revisions to the MTCA rule effective November 12, 2007.

For MTCATPH11.1: The TEF for dibenzo(a,h)anthracene has been changed from 0.4 (old version) to 0.1 (new version). This change does affect the calculation results and may result in a higher cleanup level when this compound is present at the site.

September 2006: Both Workbooks (MTCATPH & MTCASGL) were updated. The new version was dated August 2006 and has the number “11” added to the file name (MTCATPH11.xls & MTCASGL11.xls) to differentiate them from the previous version.

For MTCASGL11: Limited modification was made to enhance the usability of the program and the change does not affect the calculation results. Refer to Section 2.2 of User’s Guide for more details.

For MTCATPH11: Several changes were made to the table of physical and chemical properties and the toxicological information for several petroleum fractions and individual hazardous substances. These changes do affect the calculation results. Some modifications were made to enhance the usability of program. Refer to Section 3.4 of User’s Guide for more details.

Downloads: Important: Attempting to open the file(s) directly from the web will result in an error. Instead, save the file when the “file download” dialogue box comes up after clicking on the link below. You should then be able to open the saved file and use the workbook.

User's Guide for MTCATPH11.1 & MTCASGL11.0 (100 page, 1.6mb pdf file)

Workbook for Calculating Cleanup Levels for Individual Hazardous Substances (MTCASGL11.xls) (160kb, Compatible with Microsoft Excel 2003 and 2007 file)

Workbook for Calculating Cleanup Levels for Petroleum Contaminated Sites

For Microsoft Excel 2003 compatible: MTCATPH11.1.xls (1.8mb)

For Microsoft Excel 2007 compatible: MTCATPH11.1XLS - (900 kb)

If you have any questions, please contact Hun Seak Park at 360-407-7189.

Evaluating & Protecting Terrestrial Ecological Health

Terrestrial Ecological Evaluations (TEE) are intended to protect land-based plants and animals from exposure to contaminated soil. This guide is provided to help you understand the department's Terrestrial Ecological Evaluation process, and to help you in considering potential effects to any ecological receptors at your site.

Terrestrial Ecological Evaluation Process - An Interactive User's Guide

Statistical Tools
Statistical analysis tools for Model Toxics Control Act site cleanup work: calculating compliance statistics and for analyzing background data. The help menu includes guidance.

Read me first!

Downloads: Compatible with Microsoft Excel 97 or higher;

Workbook for calculating compliance statistics: SITE97.XLT (1.8mb)

Workbook for conducting statistical analysis of background data: BCKGD97.XLT (270kb)

MTCAStat Technical Supplement #1

Statistical Guidance for Site Managers - August 1992

If you have any questions on Statistical tools, please contact Hun Seak Park at 360-407-7189 ((hpar461@ecy.wa.gov)

Risk Communication

Dr. Vince Covello Training added November 2003