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10 st / October 2014 www.sea-technology.com ing laboratory-based testing methods. The device has also been shown to beneft investigations on the potential effects of resuspended contaminated sediments and is expected to be valuable toward assessment of the effects of underwater unexploded ordnance. It provides researchers and program managers with an alternative tool for informed decision making. Developed jointly by the Space and Naval Warfare Systems Command (SPAWAR) in San Diego, California, the University of Michigan (Ann Arbor, Michigan), AMEC (San Diego) and commercially available from Zebra-Tech Ltd. (Nelson, New Zealand), the array is robust and easy to A new tool is available to help researchers and decision makers assess ecological risk in the marine environ- ment. The Sediment Ecotoxicity Assessment Ring (SEA Ring) is an in-situ toxicity and bioavailability assessment device. The readily deployable bioassay array allows the study of in-situ aqueous and sediment toxicity exposures in relatively con- trolled conditions. It also features integrated physiochemical and passive sampling capabilities. The SEA Ring can be used for examining sediment qual- ity on site, and is particularly well-suited for assessing in- place sediment remedies that act to control bioavailability such as capping, sediment amendments and enhanced or natural attenuation. It is also applicable to the assessment of groundwater/surface-water interactions and stormwater quality, both of which are diffcult to assess accurately us- Ecological Risk Assessment Using the Sediment Ecotoxicity Assessment Ring Applications for an Integrative In-Situ Bioassay System By Gunther Rosen • John Radford • Chris Stransky (Left) SEA Ring deployment in shallow sediment at Quantico, Virginia, October 2012. (Right) Diver awaiting delivery of a SEA Ring for a sediment deployment at Quantico, Virginia, October 2012.