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Ecology Publications & Forms |
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Ecology Publications & Forms |
| Title | Method B and C Target Cleanup Goals and Adjustment for Additive Risk and Hazard |
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| DRAFT FOR PUBLIC COMMENT | Comment on this draft | ||||
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Method B and C Target Cleanup Goals and Adjustment for Additive Risk and Hazard (Number of pages: 73) (Publication Size: 1496KB)
Note: Click here to view and print
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| Author(s) | Andy Kallus | ||||
| Description | Method B and C cleanup levels established under the Model Toxics Control Act (MTCA) may need to be lowered to account for exposure to multiple hazardous substances and/or exposure pathways (i.e., total site risk). This adjustment needs to be made only if, without the adjustment, the noncancer hazard index (HI) would exceed 1, or the total excess cancer risk would exceed one in one hundred thousand (1 x 10⁻⁵). This guidance gives instructions and practical examples for adjusting cleanup levels to meet MTCA’s additive risk-based goals for cancer (1 x 10⁻⁵) and noncancer (HI of 1) health endpoints. | ||||
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The mission of the Department of Ecology is to protect, preserve, and enhance Washington’s environment. To help us meet that goal, please consider the environment before you print or request a copy.
ADA Accessibility The Department of Ecology is committed to providing people with disabilities access to information and services by meeting or exceeding the requirements of the Americans with Disabilities Act (ADA), Section 504 and 508 of the Rehabilitation Act, and Washington State Policy #188. Visit Ecology’s website for more information. |
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| Contact | Andy Kallus at 360-878-2952 or andrew.kallus@ecy.wa.gov | ||||
| Keywords | Site Cleanup, cleanup levels, Model Toxic Control Act, MTCA, Cleanup Levels and Risk Calculation (CLARC), Method B cleanup level, Method C cleanup level, additive risk, ARARs, calculating cleanup levels, cancer risk, CLARC, cleanup level adjustment, cumulative risk, noncancer hazard | ||||
| WEB PAGE | CLARC | ||||
| RELATED PUBLICATIONS | Title:
User’s Guide for the MTCATPH Workbook Version 12.0: Workbook tools for calculating soil and groundwater cleanup levels under the Model Toxics Control Act Cleanup Regulation User’s Guide for MTCASGL Version 12.0: Workbook tools for calculating soil and groundwater cleanup levels under the Model Toxics Control Act Cleanup Regulation Guidance for Remediation of Petroleum Contaminated Sites Implementation Memorandum #10: Evaluating the Human Health Toxicity of Carcinogenic PAHs (cPAHs) using Toxicity Equivalency Factors (TEFs) |
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