Lake Roosevelt Sediment and Fish PCB-Pesticide Survey

Sediment and bottom fish samples were analyzed for PCB and DDE compounds from six sites in Lake Roosevelt and two nearby water bodies in June 1990. The study was conducted by SCIOPS as part of an investigation into contaminant distribution from a pulp mill discharge. Fish were analyzed as composites of five whole fish per sample.

Use Cases

• Map spatial distribution of PCB compounds across six sediment sampling sites in Lake Roosevelt.
• Analyze DDE concentration levels in composite whole-fish samples from bottom-dwelling species.
• Correlate contaminant levels in sediment with those found in resident fish tissue.
• Assess historical contamination footprint relative to a known point source (Celgar pulp mill).

Strengths

• Samples collected from eight distinct geographic sites for spatial analysis.
• Fish tissue analysis based on composite samples of five whole fish, reducing individual variability.

Limitations

• Sample size is limited to a single collection event in June 1990.
• Data is over 30 years old and may not reflect current conditions.
• Specific row counts, column names, and analytical detection limits are unknown.

Provenance

Source

U.S. Environmental Protection Agency's Columbia River Basin: Biota Database Abstracts, via NASA EarthData.

Collection Method

Field collection of sediment and bottom fish samples, with laboratory analysis for PCB and DDE compounds.

Time Range

1990-06

Freshness

null

Geography

Lake Roosevelt (six sites between international border and Grand Coulee Dam), Spokane River, and Rufus Woods Lake, Washington, USA.