Upcoming Live Web Events
CLU-IN's ongoing series of Internet Seminars are free, web-based slide presentations with a companion audio portion. We provide two options for accessing the audio portion of the seminar: by phone line or streaming audio simulcast. More information and registration for all Internet Seminars is available by selecting the individual seminar below. Not able to make one of our live offerings? You may also view archived seminars.
SRP Water Innovation - An Integrate...
Roger Giese, Ph.D., from the Puerto Rico Testsite for Exploring Environmental Contaminants (PROTECT) SRP Center at Northeastern University, will present nontargeted tea bag extraction/mass spectrometry methodology for large urine and water samples, in regard to the problem of preterm birth. This will include analysis of sulfated exposome metabolites in urine and of pollutants in ground water samples from Puerto Rico. The tea bag technique may also become of interest for purification of drinking water by the consumer.
Damian Shea, Ph.D., a professor at North Carolina State University and investigator with the University of North Carolina at Chapel Hill SRP Center, will discuss combining target and non-target analysis with passive sampling devices to measure the external organic chemical exposome in water. As, they have developed a non-selective passive sampling device (nsPSD) that accumulates both polar and non-polar organic chemicals (log Kow range 0.2-8.0) from water and combined this with analysis using both target chemical and non-target chemical methods using LCMS and GCMS. Results from surface waters at Superfund sites and elsewhere will be presented and used to illustrate some advantages and limitations of these new methodologies for assessing risk associated with chemicals in drinking water and fish and shellfish.
Michael Denison, Ph.D., Thomas Young, Ph.D., and Candace Bever, Ph.D., from the University of California, Davis Superfund Research Center will discuss their work on developing bioanalytical tools for the detection of hazardous chemicals. They will introduce how cell-based assays provide an understanding of how hazardous chemicals interact with human receptors, while antibody-based assays are quantitative analytical tools. Examples from water sources in the Sierra Nevada Mountains and from the LA Basin in Southern California will be presented. They will further discuss how cell-based bioassays can be useful in screening large numbers of samples and then directly informing the use of high-resolution mass spectrometry to identify known and unknown hazardous chemicals.
The 1974 Safe Drinking Water Act (SDWA) regulates more than 170,000 public water systems to protect health, but not more than 13 million private wells. State and local government requirements for private well water testing are rare and inconsistent; the responsibility to ensure water safety remains with individual households. Over the last two decades, geogenic arsenic has emerged as a significant public health concern due to high prevalence in many rural American communities.
Rebecca Fry, Director UNC Superfund Research Program, will introduce the session describing the health effects associated with exposure to inorganic arsenic that include both cancer and non-cancer endpoints. Inorganic arsenic continues to poison the water of millions around the globe, including populations in the United States. She will detail research that highlights that exposures that occur during critical times of development, such as the in utero period, are associated with detrimental health outcomes in children. She will also highlight innovative public health strategies that are needed to improve this global health issue such as increasing awareness of the issues of contamination, and provision of cost-effective methods for remediation.
Yan Zheng, from the Columbia University SRP Center, Kathleen Gray, from the UNC SRP Center, and Mark Borsuk, from the Dartmouth College SRP Center, will then discuss their research and engagement efforts in different U.S. communities to identify barriers to well testing, to encourage testing of arsenic in private wells, and to empower well-water users with the tools they need to keep their drinking water safe.
ITRC's Decision Making at Contaminated Sites: Issues and Options in Human Health Risk Assessment (RISK-3, 2015) guidance document is different from existing ITRC Risk Assessment guidance and other state and federal resources because it identifies commonly encountered issues and discusses options in risk assessment when applying site-specific alternatives to defaults. In addition, the document includes links to resources and tools that provide even more detailed information on the specific issues and potential options. The ITRC Risk Assessment Team believes that state regulatory agencies and other organizations can use the RISK-3 document as a resource or reference to supplement their existing guidance. Community members and other stakeholders also may find this document helpful in understanding and using risk assessment information.
After participating in this ITRC training course, the learner will be able to apply ITRC's Decision Making at Contaminated Sites: Issues and Options in Human Health Risk (RISK-3, 2015) document when developing or reviewing site-specific risk assessments by:
- Identifying common issues encountered when alternatives to default parameters and scenarios are proposed during the planning, data evaluation, toxicity, exposure assessment, and risk characterization and providing possible options for addressing these issues
- Recognizing the value of proper planning and the role of stakeholders in the development and review of risk assessments
- Providing information (that includes links to additional resources and tools) to support decision making when alternatives to default approaches, scenarios and parameters are proposed
This ITRC Integrated Dense Nonaqueous Phase Liquid Site Strategy (IDSS-1, 2011) technical and regulatory guidance document will assist site managers in development of an integrated site remedial strategy. This course highlights five important features of an IDSS including:
- A conceptual site model (CSM) that is based on reliable characterization and an understanding of the subsurface conditions that control contaminant transport, reactivity, and distribution
- Remedial objectives and performance metrics that are clear, concise, and measureable
- Treatment technologies applied to optimize performance and take advantage of potential synergistic effects
- Monitoring based on interim and final cleanup objectives, the selected treatment technology and approach, and remedial performance goals
- Reevaluating the strategy repeatedly and even modifying the approach when objectives are not being met or when alternative methods offer similar or better outcomes at lower cost
For reference during the training class, participants should have a copy of the flow diagram, Figure 1-2 on page 6 of the ITRC Technical and Regulatory Guidance document, ITRC Integrated Dense Nonaqueous Phase Liquid Site Strategy (IDSS-1, 2011) and available as a 1-page PDF at http://www.cluin.org/conf/itrc/IDSS/ITRC-IDSS-1-Figure1-2.pdf.