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PROOF-OF-CONCEPT FOR THE IN SITU TOXICITY IDENTIFICATION EVALUATION (ITIE) TECHNOLOGY FOR ASSESSING CONTAMINATED SEDIMENTS, REMEDIATION SUCCESS, RECONTAMINATION, AND SOURCE IDENTIFICATION
Burton, Jr., G.A. SERDP Project ER18-1181, 45pp, 2019
The iTIES prototype 3 is a robust deployable system that allows for consistent and sensitive adjustments to pumping rates of ambient waters through the diagnostic array of resin treatments. The current battery of resins separates the following potential toxicants: ammonia, problematic heavy metals, and organics of various characteristics, including PFAS. A study was conducted to provide proof-of-concept of an accurate field methodology for in situ assessment that linked chemical class exposures to effects, allowing for more cost-effective monitoring and remediation decisions. Advantages of the system were higher sensitivity at detecting ambient toxicity than the traditional laboratory-based toxicity identification evaluation (TIE), fewer required resources for experiments, and a unique diagnostic tool for use in a tiered risk assessment. A resource evaluation conducted on the traditional EPA Phase 1 TIE and the iTIES determined that the iTIES required 47% less time based on staff time required for each task. The iTIE is more sensitive at detecting toxicity than the laboratory-based TIE. https://www.serdp-estcp.org/content/download/50675/498021/file/ER18-1181%20Final%20Report.pdf
The iTIES prototype 3 is a robust deployable system that allows for consistent and sensitive adjustments to pumping rates of ambient waters through the diagnostic array of resin treatments. The current battery of resins separates the following potential toxicants: ammonia, problematic heavy metals, and organics of various characteristics, including PFAS. A study was conducted to provide proof-of-concept of an accurate field methodology for in situ assessment that linked chemical class exposures to effects, allowing for more cost-effective monitoring and remediation decisions. Advantages of the system were higher sensitivity at detecting ambient toxicity than the traditional laboratory-based toxicity identification evaluation (TIE), fewer required resources for experiments, and a unique diagnostic tool for use in a tiered risk assessment. A resource evaluation conducted on the traditional EPA Phase 1 TIE and the iTIES determined that the iTIES required 47% less time based on staff time required for each task. The iTIE is more sensitive at detecting toxicity than the laboratory-based TIE. https://www.serdp-estcp.org/content/download/50675/498021/file/ER18-1181
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