When establishing cleanup levels for your contaminated site, use these guidance documents in combination with the CLARC data tables. CLARC — Cleanup Levels and Risk Calculation — is a compendium of technical information to help you determine hazardous waste cleanup levels under Washington's Model Toxics Control Act (MTCA).
Policy & Technical Support Unit
Toxics Cleanup Program
360-407-7259 (Andy Kallus, Toxicologist)
360-407-7170 (TCP main desk)