Monitoring data from five sites in the Lower Columbia River-St. Helens area evaluates the accumulation of seventeen dioxin and furan congeners in sediment and crayfish. The dataset includes sediment measurements for particle size distribution, total solids, and total organic carbon, with samples collected and analyzed in 1991. The study was conducted by SCIOPS to satisfy the City of St. Helens NPDES Permit monitoring requirements.
Use Cases
- Analyze correlations between sediment total organic carbon (TOC) and concentrations of specific dioxin/furan congeners.
- Map contamination levels across five sampling stations using provided latitude and longitude coordinates.
- Compare pollutant concentrations in sediment (dry weight basis) to levels found in crayfish (Pacifastacus leniusculus) biota.
- Assess particle size distribution data alongside congener concentrations to understand sediment-pollutant interactions.
Strengths
- Includes measurements for seventeen specific dioxin and furan congeners.
- Provides data on multiple sediment properties: particle size, total solids, and total organic carbon.
- Sampling locations are georeferenced with latitude and longitude coordinates.
Limitations
- Sample size is limited to five collection sites.
- Data is from a single sampling period in 1991, offering no temporal trend analysis.
- Specific row counts and dataset size are unknown.
Provenance
- Source
- SCIOPS, with metadata taken from the Columbia River Basin: Sediment Database Abstracts.
- Collection Method
- Sediment samples were composite grabs analyzed via EPA methods (e.g., 1613A for dioxins/furans). Crayfish were collected for biota analysis.
- Time Range
- 1991
- Freshness
- Data reflects a single collection period with a last updated date of 1991-09-01.
- Geography
- Lower Columbia River-St. Helens area, Oregon, USA.