Page 14 - Lake Roosevelt Forum 2020 Public Guide

Human Health Risk Assessment
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Determining Future Cleanup or Other Actions
Results from the Human Health Risk Assessment (HHRA) and the Baseline Ecological Risk Assessment (BERA) will be integrated into a Remedial Investigation (RI) report. The RI will inform next steps to protect human health and the environment. Based on risk, EPA and TAI will complete a feasibility study to evaluate potential remedial alternatives. Additional treatability studies may be required to help inform the evaluation between remedial alternatives.
Strategies for addressing lead in soil to protect people commonly include replacement or capping of soils. For the UCR site, EPA and TAI are also evaluating using soil amendments to reduce exposure to lead in surface-soil where removal or capping may not be appropriate, such as open space lands.
The timing and completion of one or more possible treatability studies to address identified human health and ecological risks is uncertain. The BERA, for instance, is not expected to be complete until 2022. Time will then be needed to integrate information from the HHRA and BERA into the RI. In addition, the length of time needed for a Feasibility Study is uncertain because it
is an iterative process that may require further data collection or treatability studies. As a result, residents are unlikely to see additional cleanup or other actions for at least 3-4 years unless further voluntary cleanup actions are planned and agreed to prior to a Feasibility Study.
In the meantime, citizens interested in soil sampling or taking precautionary measures to avoid lead exposure are encouraged to visit Ecology’s Dirt Alert program web site (ecology.wa.gov/Spills-Cleanup/Contamination-cleanup/Dirt-Alert-program).