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  • 1
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    Alliance for Coastal Technologies | Solomons, MD
    In:  http://aquaticcommons.org/id/eprint/3114 | 130 | 2011-09-29 17:51:58 | 3114 | University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory
    Publication Date: 2021-07-01
    Description: The Alliance for Coastal Technologies (ACT) convened a workshop on Evaluating Approaches and Technologies for Monitoring Organic Contaminants in the Aquatic Environment in Ann Arbor, MI on July 21-23, 2006. The primary objectives of this workshop were to: 1) identify the priority management information needs relative to organic contaminant loading; 2) explore themost appropriate approaches to estimating mass loading; and 3) evaluate the current status of thesensor technology. To meet these objectives, a mixture of leading research scientists, resourcemanagers, and industry representatives were brought together for a focused two-day workshop.The workshop featured four plenary talks followed by breakout sessions in which arranged groupsof participants where charged to respond to a series of focused discussion questions.At present, there are major concerns about the inadequacies in approaches and technologies forquantifying mass emissions and detection of organic contaminants for protecting municipal watersupplies and receiving waters. Managers use estimates of land-based contaminant loadings torivers, lakes, and oceans to assess relative risk among various contaminant sources, determinecompliance with regulatory standards, and define progress in source reduction. However, accuratelyquantifying contaminant loading remains a major challenge. Loading occurs over a range ofhydrologic conditions, requiring measurement technologies that can accommodate a broad rangeof ambient conditions. In addition, in situ chemical sensors that provide a means for acquiringcontinuous concentration measurements are still under development, particularly for organic contaminantsthat typically occur at low concentrations. Better approaches and strategies for estimatingcontaminant loading, including evaluations of both sampling design and sensor technologies,need to be identified. The following general recommendations were made in an effort to advancefuture organic contaminant monitoring:1. Improve the understanding of material balance in aquatic systems and the relationship betweenpotential surrogate measures (e.g., DOC, chlorophyll, particle size distribution) and target constituents.2. Develop continuous real-time sensors to be used by managers as screening measures and triggersfor more intensive monitoring.3. Pursue surrogate measures and indicators of organic pollutant contamination, such as CDOM,turbidity, or non-equilibrium partitioning.4. Develop continuous field-deployable sensors for PCBs, PAHs, pyrethroids, and emerging contaminantsof concern and develop strategies that couple sampling approaches with tools that incorporatesensor synergy (i.e., measure appropriate surrogates along with the dissolved organics toallow full mass emission estimation).[PDF contains 20 pages]
    Description: NOAA
    Description: Alliance for Coastal Technologies, CBL/UMCES
    Keywords: Engineering ; Earth Sciences ; Environment ; Chemistry
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
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  • 2
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    Alliance for Coastal Technologies | Solomons, MD
    In:  http://aquaticcommons.org/id/eprint/3110 | 130 | 2011-09-29 17:51:42 | 3110 | University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory
    Publication Date: 2021-07-01
    Description: This Alliance for Coastal Technologies (ACT) workshop was convened to assess the availabilityand state of development of conductivity-temperature sensors that can meet the needs of coastalmonitoring and management communities. Rased on the discussion, there are presently a numberof commercial sensor options available, with a wide range of package configurations suitable fordeployment in a range of coastal environments. However, some of the central questions posedin the workshop planning documents were left somewhat unresolved. The workshop descriptionemphasized coastal management requirements and, in particular, whether less expensive, easilydeployed, lower-resolution instruments might serve many management needs. While several participantsexpressed interest in this class of conductivity-temperature sensors, based on input fromthe manufacturers, it is not clear that simply relaxing the present level of resolution of existing instrumentswill result in instruments of significantly lower unit cost. Conductivity-temperature sensorsare available near or under the $1,000 unit cost that was operationally defined at the workshopas a breakpoint for what might be considered to be a "low cost" sensor. For the manufacturers, akey consideration before undertaking the effort to develop lower cost sensors is whether there willbe a significant market. In terms of defining "low cost," it was also emphasized that the "life cyclecosts" for a given instrument must be considered (e.g., including personnel costs for deploymentand maintenance). An adequate market survey to demonstrate likely applications and a viablemarket for lower cost sensors is needed. Another topic for the workshop was the introductionto the proposed ACT verification for conductivity-temperature sensors. Following a summaryof the process as envisioned by ACT, initial feedback was solicited. Protocol development willbe pursued further in a workshop involving ACT personnel and conductivity-temperature sensormanufacturers.[PDF contains 28 pages]
    Description: NOAA
    Description: Alliance for Coastal Technologies, CBL/UMCES
    Keywords: Earth Sciences ; Environment ; Chemistry
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
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  • 3
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    Alliance for Coastal Technologies | Solomons, MD
    In:  http://aquaticcommons.org/id/eprint/3126 | 130 | 2011-09-29 17:52:50 | 3126
    Publication Date: 2021-06-25
    Description: The Alliance for Coastal Technologies (ACT) Workshop "Applications of in situ Fluorometers inNearshore Waters" was held in Cape Elizabeth, Maine, February 2-4,2005, with sponsorship bythe Gulf of Maine Ocean Observing System (GoMOOS), one of the ACT partner organization.The purpose of the workshop was to explore recent trends in fluorometry as it relates to resourcemanagement applications in nearshore environments. Participants included representatives fromstate and federal environmental management agencies as well as research institutions, many ofwhom are currently using this technology in their research and management applications.Manufacturers and developers of fluorometric measuring systems also attended the meeting.The Workshop attendees discussed the historical and present uses of fluorometry technology andidentified the great potential for its use by coastal managers to fulfill their regulatory andmanagement objectives. Participants also identified some of the challenges associated with thecorrect use of Fluorometers to estimate biomass and the rate of primary productivity. TheWorkshop concluded that in order to expand the existing use of fluorometers in both academicand resource management disciplines, several issues concerning data collection, instrumentcalibration, and data interpretation needed to be addressed. Participants identified twelverecommendations, the top five of which are listed below:Recommendations1) Develop a "Guide" that describes the most important aspects of fluorescencemeasurements. This guide should be written by an expert party, with both research andindustry input, and should be distributed by all manufacturers with theirinstrumentation. The guide should also be made available on the ACT website as wellas those of other relevant organizations. The guide should include discussions on thefollowing topics:The benefits of using fluorometers in research and resource managementapplications;What fluorometers can and cannot provide in terms of measurements;The necessary assumptions required before applying fluorometry;Characterization and calibration of fluorometers; (pdf contains 32 pages)
    Description: NOAA
    Description: Alliance for Coastal Technologies, CBL/UMCES
    Keywords: Environment ; Chemistry
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
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