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Toxics Cleanup Program

Tools & Resources

Assessing Risk / Establishing Cleanup Levels

Cleanup Levels and Risk Calculation (CLARC)

CLARC is not currently a searchable database. CLARC is a collection of technical information to assist in setting cleanup standards under the Model Toxics Control Act (MTCA).  It includes a series of spreadsheets of chemical-specific information, pre-calculated cleanup levels, technical documentation and related guidance documents. 




Natural Attenuation of Petroleum-Contaminated Groundwater

The following documents provide guidance and calculation tools for demonstrating natural attenuation of groundwater is occurring and enable prediction of when groundwater cleanup levels will be met.




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.



Additional Helpful Resources

This page last updated December 2, 2015