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TOXICITY IDENTIFICATION EVALUATION WORKSHOP-PART II: WHAT WORKS, WHAT DOESN'T, AND DEVELOPMENTS FOR EFFLUENTS AND AQUEOUS MEDIA
Citation:
Miller, J., T J. NorbergKing, L. W. Ausley, W. L. Goodfellow, W. T. Waller, AND D. T. Burton. TOXICITY IDENTIFICATION EVALUATION WORKSHOP-PART II: WHAT WORKS, WHAT DOESN'T, AND DEVELOPMENTS FOR EFFLUENTS AND AQUEOUS MEDIA. Presented at 22nd Annual SETAC Meeting, Baltimore, MD, November 11-15, 2001.
Description:
Toxicity reduction evaluations (TRE) and Toxicity Identification Evaluations (TIE) case examples were the basis of a technical workshop held by SETAC. Techniques to evaluate the mixtures of toxicants by using acute and chronic toxicity endpoints that incorporate marine, estuarine, and freshwater test species were delineated. TIEs are highly useful, effective tools and they are routinely applied by many contact laboratories for toxic media. However, the data is not often available in the open literature. From this workshop, progress for wastewater, surface water and sediment porewater TRE/TIEs were delineated and methods shared. Additional TIE manipulation steps that are useful for conducting TIEs were documented by case examples. A flow chart and matrix of steps resulting in successful identification for several toxicants were outlined, such as for metals, organic, ions, ammonia, and others. Experiences of the participants with various aqueous media were presented for what seems to work, what doesn't and participants discussed their most successful TIE manipulations. One step that has not been clear for many regulated dischargers is when to begin a TRE/TIE and what data triggers that decision; participants outlined guidance for the dischargers. How to communicate between researchers and owners/stakeholders regarding the TIE/TRE was summarized and recommendations were made. The major conclusions of the workshop and future research needs will be discussed.