You are here:
INTERIM FINAL GUIDANCE: DEVELOPING RISK-BASED CLEANUP LEVELS AT RESOURCE CONSERVATION AND RECOVERY ACT SITES IN REGION 10
Impact/Purpose:
The guidance document sets forth recommended approaches to conduct risk assessment and other activities which are integral to the process of developing risk-based cleanup levels at RCRA corrective action facilities in Region 10 of the U.S. EPA. This guidance is intended for use by U.S.EPA Region 10 personnel and RCRA-regulated facilities undergoing corrective action or clean closures in Region 10.
Description:
This guidance document references EPA Region 10 state RCRA correction action programs and relevant laws and regulations. EPA guidance on determing data quality objectives and performing a data quality assessment is summarized. The major risk assessment steps, including data evaluation, exposure assessment, toxicity assessment, and risk characterizatoin are described. Methods for determining human and ecological risk-based cleanup levels using deterministic and probabilistic techniques are presented. Screening-level ecological risk assessments are described. Procedures to follow when determining compliance with cleanup levels are also described. Federal, state and general literature references that provide further details on the risk calculation processes are identified thoughout the document. Consultation with Region 10 human health scientists and ecologists is recommended is complex aspects of the risk assessment process are encoutered.