Combining post-remediation monitoring and baseline ecological risk assessment at an environmentally contaminated site
Conference
·
OSTI ID:367476
Post-remediation monitoring, habitat restoration, and baseline ecological risk assessment are being integrated at an environmentally contaminated Navy installation in San Francisco Bay. Remedial and restoration actions were performed in some areas following a record of decision, but adjacent areas were not evaluated for potential ecological risks. Because the contaminated area included critical habitat of endangered species, only a portion of the area was excavated; the remediated and non-remediated areas are the subject of a long term monitoring program to track potential migration of contaminants across the site and to validate the effectiveness of the remediation. The monitoring program combines chemical, toxicological, and tissue residue sampling. Data from the monitoring efforts form the foundation for the baseline assessment by highlighting contaminants, ecological receptors, and exposure pathways of potential concern for remediated, restored, and monitoring areas. Areas not yet assessed for ecological risk are being evaluated by focused chemical sampling, toxicity testing, and tissue residue analysis, Chemical concentrations in tissues of clams, rodents, and plants collected during monitoring efforts will be supplemented by tissue residue analysis of benthic invertebrates and used in the baseline assessment to model potential exposure and effects and to evaluate potential risks to high trophic level receptors. Finally, the monitoring protocol will be reevaluated based on the results of the baseline assessment to ensure that the monitoring strategy adequately targets areas of greatest ecological concern, The concurrence of the monitoring, habitat restoration, and baseline assessment efforts provides a unique opportunity to validate risk management decisions concerning remediation and restoration of a critical wetlands habitat.
- OSTI ID:
- 367476
- Report Number(s):
- CONF-9511137--; ISBN 1-880611-03-1
- Country of Publication:
- United States
- Language:
- English
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