| Study ID | ASPB_TACHAN_10 |
| Study Name | Evaluating Toxicity of As and Pb in different soil types, Tacoma Smelter Plume/Hanford Old Orchards |
| EIM Data Entry Review Status | Reviewed |
| Study Type | General environmental study |
| Study Purpose | Address lack of field data for As and Pb soil toxicity. Analyze data for risk to wildlife, soil biota, and people based on a wildlife bioaccumulation model. Increase knowledge of soil type and physical characteristics that influence As and Pb toxicity. |
| Field Collection Date Range | 5/10/2010 - 8/25/2010 |
| Data First/Last Loaded Date |  |
| Data Last Updated Date | |
| Ecology Program or Other Responsible Entity | Ecy Environmental Assessment Program |
| Ecology Contact | Janice Sloan |
| Ecology Monitoring Program | |
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| Study QA Planning Level | LEVEL 4: Approved QAPP or SAP. |
| Study QA Project Plan Description | Historic smelting operations at the ASARCO facility in Tacoma and use of lead arsenate pesticides in fruit orchards within the Hanford Site have resulted in widespread arsenic and lead contamination. Cleanup activities at both of these sites have focused primarily on human health risks.
The Washington State Department of Ecology (Ecology) will evaluate impacts of arsenic and lead contaminated soils on wildlife to determine the suitability of current ecological soil screening levels under the Model Toxics Control Act in both contaminated areas. Results of the study will be used to help establish ecologically-based cleanup levels that protect wildlife at sites in the Tacoma Smelter Plume footprint and in the Hanford Old Orchards area.
Twenty-five locations in the Tacoma Smelter Plume and 11 locations in the Hanford Old Orchards representing a range of arsenic and lead concentrations in different soil types will be sampled. Soil, native plant, and earthworm or beetle samples will be analyzed for arsenic and lead. Twenty-one of the soil samples will also be analyzed for copper and lettuce and earthworms bioassay success. In addition, arsenic species will be analyzed in 16 of the soil samples. Soil and habitat characteristics will be observed at each location. This study design provides a framework for determining how well soil type predicts toxicity and how different levels of arsenic and lead affect wildlife. |
| Study QA Assessment Level | Level 5: Data Verified and Assessed for Usability in a Peer-Reviewed Study Report |
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