SPECIAL NOTICE
B -- B--ANALYSIS OF DIATOM IN SEDIMENT
- Notice Date
- 7/19/2022 3:29:49 PM
- Notice Type
- Special Notice
- NAICS
- 541380
— Testing Laboratories
- Contracting Office
- OFFICE OF ACQUISITON GRANTS SACRAMENTO CA 95819 USA
- ZIP Code
- 95819
- Solicitation Number
- 140G0322Q0191
- Response Due
- 7/26/2022 2:00:00 PM
- Archive Date
- 09/30/2022
- Point of Contact
- Deng, Yangzhi, Phone: 916-278-9326
- E-Mail Address
-
yangzhideng@usgs.gov
(yangzhideng@usgs.gov)
- Description
- ANALYSIS OF DIATOM IN SEDIMENT Notice of Intent This is a notice of intent to solicit from a single source. The U.S. Geological Survey (USGS), intends to award a purchase order to Eileen Hemphill-Haley (Hemphill-Haley Consulting (HHC)) for analysis of diatoms in sediments from the Klamath River Basin. Award will be made in accordance with Federal Acquisition Regulation (FAR) 13.106-1(b) and the procedures at FAR Part 12 entitled, Acquisition of Commercial Items and FAR Part 13 entitled, Simplified Acquisition Procedures. Eileen Hemphill-Haley has experience as a lead-PI and co-PI on academic and similar USGS studies and reports on diatom taxonomy, coastal and tectonic change, and using diatoms as tracers for past deposition by tsunami, storms, and floods. Data continuity and compatibility are critical to these studies. The purpose of this notice is to satisfy the requirements of FAR Subpart 5.101(a)(2) and FAR 5.2. This notice of intent is not a request for competitive quotes. However, all responsible parties may submit a quotation by the closing date of this announcement which shall be considered by the agency. No solicitation will be issued. A determination not to compete this action based upon responses received is in the sole discretion of the Government. The NAICS code for this action is 541380, Testing Laboratory. Responses or inquiries shall only be accepted through electronic mail addressed to yangzhideng@usgs.gov and must be uploaded and received in their entirety no later than July 26, 2022 at 1700 ET. Responses submitted by hardcopy or any web portal shall not be accepted or considered. Scope of Work: Analysis of Diatoms in Klamath River Sediment as Tracers of Klamath Reservoir Sediment 1.0 Introduction and Background Four dams on the Klamath River, in Oregon and California, are proposed for removal in January 2024. The reservoirs behind the dams contain an estimated 13 million cubic meters of sediment, a large proportion of which would be released downstream. The fate of the reservoir sediments has been a scientific and public concern. However numerous other potential sediment sources exist in the 190 miles between the dams to be removed and the ocean, including riparian areas along the river, slag piles from historical mining, tributary inputs, landslides, and forest fires. The USGS is interested in methods to differentiate reservoir sediment from these and other sources in order to better understand the effect of the dam removal on the river�s geomorphology and ecology. Diatoms are a type of algae that grow in water bodies, and some diatom species can be highly specialized in their requirements for water quality or physical environment. Diatom�s cellular morphologies include silica-based structures (frustules) that are both strongly characteristic of each species and also resistant to decay. The analysis of diatoms as indicators of water quality or other environments of origin has therefore become a powerful and specialized field of study. In the Klamath River, the reservoirs behind the dams to be removed are known to create a specific environment (highly eutrophic, warm, not flowing) with resulting diatom species that are expected to be different from those actively growing in the river downstream of the dams and in other tributaries. We propose to use diatoms in Klamath Reservoir sediments as a tracer of reservoir sediment movement and deposition following dam removal. Samples from the reservoirs and of bed material along the mainstem Klamath river and its tributaries, that could contain sediment from other possible sources along the river corridor, will be analyzed prior to removal to identify the species present in the reservoirs and the river under baseline conditions. Following dam removal, additional samples will be analyzed, and mixture analysis performed (under a separate Scope of Work) to determine the relative proportions of reservoir sediment at different locations. In this initial work, pre dam removal-samples will be analyzed, for different diatom assemblages, in order to characterize the sediment sources under baseline conditions. 2.0 Scope The work will include analysis of 60 samples that were previously collected. Sample types include reservoir sediment collected by coring and bulk riverine sediment. The reservoir sediments are from 3 of 4 sites that are proposed for removal; the unsampled reservoir does not retain sediment. The riverine sediment is from 11 mainstem sites and 14 downstream tributary sites. Samples are to be processed to produced quantitative microslides for analysis of diatom species composition and abundance. A voucher flora of diatom images will be produced (Alers-Garcia et al. 2021). 3.0 Applicable Documents Alers-Garc�a, J., Lee, S.S. and Spaulding, S.A. (2021), Resources and Practices to Improve Diatom Data Quality. Limnology and Oceanography Bulletin, 30: 48-53. https://doi.org/10.1002/lob.10433 Hemphill-Haley, E., Kelsey, H.M., Graehl, N., Casso, M., Caldwell, Loofbourrow, C., Robinson, M., Vermeer, J., and Southwick, E., 2019, Recent sandy deposits at five northern California coastal wetlands�Stratigraphy, diatoms, and implications for storm and tsunami hazards: U.S. Geological Survey Scientific Investigations Report 2018�5111, 187 p., http://pubs.er.usgs.gov/publication/sir20185111. Spaulding, S.A., Potapova, M.G., Bishop, I.W., Lee, S.S., Gasperak, T.S., Jovanovska, E., and Edlund, M.B. 2021. Diatoms.org: supporting taxonomists, connecting communities. Diatom Research 36(4): 291-304. doi:10.1080/0269249X.2021.2006790 Renberg, I. 1990. A procedure for preparing large sets of diatom slides from sediment cores. Journal of Paleolimnology 4: 87-90. Tyree, M.A., Carlisle, D.M., and Spaulding, S.A., 2020, Diatom enumeration method influences biological assessments of southeastern USA streams: Freshwater Science, v. 39, no. 1, p. 183-195, doi: 10.1086/707725, https://doi.org/10.1086/707725 4.0 Technical Requirements Sediment samples will be prepared following standard digestion procedures in Renberg (1990). Sediment samples will be initially field sieved, wet, using a 2 mm mesh size, and subsamples for diatom analysis cleaned for with 30% H2O2. Samples will be mounted for photography using Hyrax as a mounting medium. Samples will be evaluated using light microscopy by enumerating 100 valves and determining the species identification of those 100 valves. From these data, relative species abundance (%) and valve concentrations in valves/mg will be estimated. Taxonomic identification should follow Spaulding et al. (2022) and references within. 5.0 Deliverables Deliverables will include a report containing a) a description of methods used including citations of standard methods where applicable, b) voucher flora representing the taxa encountered in the project, c) spreadsheets containing lists of diatom taxa and quantitative counts for each sample site (MS Excel format), d) comments on the condition (preservation) of valves in each sample. For example, valves broken, dissolved, or good preservation, d) interpretation of the degree that taxa may be representative of reservoir sediment sources.
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-
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- Record
- SN06393405-F 20220721/220719230051 (samdaily.us)
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