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Tags
Selenium, Sediment, Ecological Risk Assessment
This data was created to support efforts by the California Department of Water Resources (DWR) to assess the potential risks from selenium to ecological receptors under the Salton Sea Ecosystem Restoration Program. The collected data serve as baseline data to describe current selenium conditions in the Salton Sea ecosystem for abiotic (water, sediment, and soil) and biotic (aquatic and terrestrial organisms) media. Historical data was incorporated from numerous sources as well as recent analytical data for samples collected in the spring of 2005. Historical data included in the database focus on selenium (and related compounds), although other metals may have been included depending on whether the data were available electronically or hard-copy. The 2005 samples were specifically collected to address data gaps pertaining to the ecological risk assessment for selenium. However, some of these sample analyses were also used to support human health risk assessment activities and include other inorganics, pesticides, polychorinated biphenyls, and semi-volatile organics. Soil and shoreline sediment samples were used to support assessments of potential for health risks from exposure to dried lakebed sediments in a shrinking future Salton Sea.
The entire dataset contains analytical results (17,884 records) for abiotic (water, sediment, and soil) and biotic (aquatic and terrestrial organisms) media in and near the Salton Sea. The dataset was broken into four separate datasets - biota, soil, water, and sediment. The data was created in 2005 to support efforts by the California Department of Water Resources (DWR) to assess the potential risks from selenium to ecological receptors under the Salton Sea Ecosystem Restoration Program. The database incorporates historical data from numerous sources (dating back to 1978) as well as recent analytical data for samples collected in the spring of 2005 to specifically address data gaps pertaining to the risk assessment for selenium as documented in the Final Report on Selenium at the Salton Sea and Summary of Data Gaps (DWR 2005a). Additionally, some of these sample analyses were used to support human health risk assessment activities. Other analytical data include the results of two bench-scale tests using Salton Sea sediments and water to measure selenium flux from intact sediment cores and selenium bioaccumulation using aquatic invertebrates. This data is the basis for interim data processing steps, which were used to first select a subset of data for use in the ecorisk analysis, and secondly to transform that subset into a grid estimating soil selenium concentrations on a 200-meter grid on the Salton Sea lakebed.
CH2M HILL compiled this dataset for the California Department of Water Resources. Data from multiple sources are included within this database. See full listing of sources in entity attribute metadata, for attribute "Source_Cod".
Disclaimer: The State makes no claims, promises, or guarantees about the accuracy, completeness, reliability, or adequacy of these data and expressly disclaims liability for errors and omissions in these data. No warranty of any kind, implied, expressed, or statutory, including but not limited to the warranties of non-infringement of third party rights, title, merchantability, fitness for a particular purpose, and freedom from computer virus, is given with respect to these data.
Extent
| West | -116.118137 | East | -115.277139 |
| North | 33.523724 | South | 32.658872 |
| Maximum (zoomed in) | 1:5,000 |
| Minimum (zoomed out) | 1:150,000,000 |
Disclaimer: The State makes no claims, promises, or guarantees about the accuracy, completeness, reliability, or adequacy of these data and expressly disclaims liability for errors and omissions in these data. No warranty of any kind, implied, expressed, or statutory, including but not limited to the warranties of non-infringement of third party rights, title, merchantability, fitness for a particular purpose, and freedom from computer virus, is given with respect to these data.