Download or read book Update On Aquatic Toxicity Whole Effluent Toxicity WET Issues 2005 written by Winona L. Specht and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper summarizes recent changes in the field of aquatic toxicity/Whole Effluent Toxicity (WET) testing. There are been numerous legal challenges to the validity of WET testing, both at the federal and state levels, but to date, the regulators have prevailed and WET testing is used as a regulatory tool to ensure that the biota of receiving streams are protected. The most recent ruling at the federal level was on December 10, 2004, when a federal appeals court in the District of Columbia upheld the validity of WET testing. At the state level, at the urging of the South Carolina Manufacturers Alliance, the state legislature passed a law (the South Carolina Aquatic Life Protection Act) in 2004 that requires the South Carolina Department of Health and Environmental Control (DHEC) to evaluate the accuracy and precision of the WET test. As a result, SCDHEC removed WET test limits from several NPDES permits. EPA took issue with the impact of the legislation and SCDHEC's actions, and as a result, EPA has taken over several NPDES permits from SCDHEC and threatened to revoke the state's delegated NPDES permit program. A new Act was signed into law in March 2005, which does not exclude the use of chronic toxicity testing for regulatory compliance. As a result, EPA has turned over the issuance of NPDES permits back to SCDHEC. In December 2004, the U.S. EPA issued the Draft National WET Implementation Guidance document for review and comment. The guidance contains recommendations on the determination of ''reasonable potential'' for toxicity. The EPA's ECOTOX database is a valuable resource of toxicity data for many chemicals. For those cases in which there are no toxicity data or very limited data available, the EPA has developed two models, the Interspecies Correlation Estimation (ICE) and the Acute to Chronic Estimation (ACE), for predicting toxicity. Active areas of research include assessing the uptake of heavy metals via multiple routes of exposure, the development of risk-based criteria for persistent bioaccumulative toxicants, and the new field of computational toxicology, which utilizes modeling tools to predict toxic responses.

Download or read book Whole Effluent Toxicity WET Control Policy written by United States. Environmental Protection Agency. Office of Water and published by . This book was released on 1994 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Whole Effluent Toxicity Training Video Series written by and published by . This book was released on 2006 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Support Document for Water Quality based Toxics Control written by United States. Environmental Protection Agency. Office of Water and published by . This book was released on 1985 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Whole Effluent Toxicity Wet Control Policy U S Environmental Protection Agency July 1994 written by United States. Environmental Protection Agency and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Methods for Aquatic Toxicity Identification Evaluations written by Donald Irvin Mount and published by . This book was released on 1988 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Whole Effluent Toxicity WET written by Randall Marshall and published by . This book was released on 1998 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Whole Effluent Toxicity Program Guidance Document written by and published by . This book was released on 1996 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Regions Nine and Ten Guidance for Implementing Whole Effluent Toxicity Testing Programs written by Madonna Narvaez and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Environmental Protection Agency (EPA), Regions 9 and 10, have developed draft guidance for implementing whole effluent toxicity (WET) programs. This guidance incorporates information on WET requirements from supporting EPA documents ... and the EPA toxicity test method manuals, in order to provide a single concise document ... [T]his document includes input from States as well as the regulated community on some non-policy issues. This interim guidance also incorporates many comments from States, EPA Headquarters, and other EPA regions ..."--Executive Summary, p. ES-1.

Download or read book Methods for Aquatic Toxicity Identification Evaluations Phase III toxicity characterization procedures written by Donald Irvin Mount and published by . This book was released on 1988 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Toxicity Reduction and Toxicity Identification Evaluations for Effluents Ambient Waters and Other Aqueous Media written by Teresa Norberg-King and published by SETAC. This book was released on 2005 with total page 497 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Short term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms written by and published by . This book was released on 1994 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Method Guidance and Recommendations for Whole Effluent Toxicity WET Testing 40 CFR Part 136 written by and published by . This book was released on 2000 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Illuminating Whole Effluent Toxicity Testing written by Jason C. Fortner and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Understanding and Accounting for Method Variability in Whole Effluent Toxicity Applications Under the National Pollutant Discharge Elimination System Program written by Barry Leonard and published by . This book was released on 2004-12-01 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Fed. Water Pollution Control Act, commonly known as the Clean Water Act, was enacted in 1972 with the objective of restoring the chemical, physical, & biological integrity of the Nation's waters.Ó Among the EPAs efforts toward this objective is the Nat. Pollutant Discharge Elimination System program, designed to control toxic discharges, implement water quality standards, & restore waters to fishable & swimmableÓ condition. One approach EPA employs to control toxic pollutants uses whole effluent toxicity (WET) controls. This report addresses questions raised on WET test method variability & to satisfy a requirement of a July 1998 settlement agreement with litigants for the Western Coalition of Arid States & Edison Electric Inst. Illus.

Download or read book Fundamentals Of Aquatic Toxicology written by Gary M. Rand and published by CRC Press. This book was released on 2020-08-06 with total page 1152 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text is divided into three parts. The first part describes basic toxicological concepts and methodologies used in aquatic toxicity testing, including the philosophies underlying testing strategies now required to meet and support regulatory standards. The second part of the book discusses various factors that affect transport, transformation, ultimate distribution, and accumulation of chemicals in the aquatic environment, along with the use of modelling to predict fate.; The final section of the book reviews types of effects or endpoints evaluated in field studies and the use of structure-activity relationships in aquatic toxicology to predict biological activity and physio-chemical properties of a chemical. This section also contains an extensive background of environmental legislation in the USA and within the European Community, and an introduction to hazard/risk assessment with case studies.

Download or read book Methods for Measuring the Acute Toxicity of Effluents to Aquatic Organisms written by William Peltier and published by . This book was released on 1978 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: