SOLICITATION NOTICE
A -- Measurement and Modeling of Ecosystem Risk and Recovery for Insitu Treatment of Contaminated Sediments - Justification and Approval (J&A)
- Notice Date
- 10/6/2010
- Notice Type
- Justification and Approval (J&A)
- NAICS
- 541712
— Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)
- Contracting Office
- USACE HEC, Ft. Belvoir, ATTN: CEHEC-CT, 7701 Telegraph Road, Alexandria, VA 22315-3860
- ZIP Code
- 22315-3860
- Solicitation Number
- W912HQ-SN-10-0005
- Archive Date
- 11/14/2010
- Point of Contact
- Nancy Hilleary, 703-428-6120
- E-Mail Address
-
USACE HEC, Ft. Belvoir
(Nancy.L.Hilleary@usace.army.mil)
- Small Business Set-Aside
- N/A
- Award Number
- W912HQ-10-C-0079
- Award Date
- 9/28/2010
- Description
- J&A The objectives of this strategy are to incorporate rapid, inexpensive assessment tools to measure contaminant concentrations in the sediment pore water, to use a biodynamic modeling approach to predict contaminant burden at the base of the food web, and to develop a general model to predict the ecological characteristics of recovery. The three objectives were tied together in that biodynamic modeling predictions of contaminant uptake, which depend on contaminant pore water concentrations measured with the rapid assessment tools, were employed in the general ecosystem recovery model. Using this comprehensive strategy, researchers assessed the ecological recovery at Hunters Point Naval Shipyard Parcel F (San Francisco Bay, California) after in situ remediation by activated carbon (AC) amendment. The field work demonstrated that sediments in contaminated tidal mudflats can be amended with AC using commercial equipment, sequester contaminants, and reduce exposures to pore water and benthic organisms. It was shown that AC in the field retained its capacity to continually sorb PCBs months after deployment. However, given that there are less overall reductions in the field versus the laboratory studies, it was determined that a follow up effort is needed to develop predictive models that assess long-term trends in PCB-pore water concentrations and availability under field conditions with slow mass transfer and heterogeneous AC distribution from brief mixing events in the field.
- Web Link
-
FBO.gov Permalink
(https://www.fbo.gov/spg/USA/COE/DACA72/W912HQ-SN-10-0005/listing.html)
- Record
- SN02306922-W 20101008/101006234242-85733bbc68ffd4c02e2049cc725e717b (fbodaily.com)
- Source
-
FedBizOpps Link to This Notice
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