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EBookClubs

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Book Federal Register

Download or read book Federal Register written by and published by . This book was released on 1993-04-14 with total page 1080 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Developing Ambient Water Quality Criteria for Mercury

Download or read book Developing Ambient Water Quality Criteria for Mercury written by D. R. J. Moore and published by IWA Publishing. This book was released on 2003-07-31 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project examined the development of ambient water quality criteria (AWQC) for the protection of wildlife for mercury. Mercury is considered a serious risk to wildlife in many areas. As a result, the Great Lakes Water Quality Initiative and others have developed AWQC. These AWQC have been controversial, however, because (1) the AWQC were single values that did not account for site-specific conditions; (2) derivation of the AWQC relied on a single NOAEL, and (3) the AWQC had an unknown level of conservatism because of reliance on both average and conservative assumptions and uncertainty factors. Rather than develop a single value AWQC for total mercury, we derive an AWQC model that explicitly incorporates factors controlling bioavailability, methylation rates and bioaccumulation in the aquatic environment (e.g., pH, DOC, sulfate). To derive our AWQC model, field data was collected including numerous water quality parameters and total mercury and methylmercury concentrations in whole body fish tissue from 31 lakes in Ontario and an additional 10 lakes in Nova Scotia. An independent dataset consisting of 51 water bodies in the United States was then used to confirm the validity and robustness of the AWQC model. Next we combined the results of chronic-feeding studies with similar protocols and endpoints, in a meta-analysis to derive a dose-response curve for mink exposed to mercury in the diet. Using this approach, one can derive an LD5 or other similar endpoint that can then be used as the basis for deriving -wildlife AWQC. In the final step, we used a probabilistic risk model to estimate the concentrations of methylmercury in water that would lead to levels in fish sufficient for there to be a 10% probability of exceeding the mink LD5. This analysis was repeated for various combinations of pH and DOC. The result is an AWQC model for mercury for the protection of wildlife that can be used for a variety of site-specific conditions. This publication can also be purchased and downloaded via Pay Per View on Water Intelligence Online - click on the Pay Per View icon below

Book Water Quality Guidance for the Great Lakes System

Download or read book Water Quality Guidance for the Great Lakes System written by and published by . This book was released on 1995 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book EPA National Publications Catalog

Download or read book EPA National Publications Catalog written by United States. Environmental Protection Agency and published by . This book was released on 1998 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book A Practical Guide to Understanding Managing and Reviewing Environmental Risk Assessment Reports

Download or read book A Practical Guide to Understanding Managing and Reviewing Environmental Risk Assessment Reports written by Sally L. Benjamin and published by CRC Press. This book was released on 2001-02-21 with total page 475 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Practical Guide to Understanding, Managing and Reviewing Environmental Risk Assessment Reports provides team leaders and team members with a strategy for developing the elements of risk assessment into a readable and beneficial report. The authors believe that successful management of the risk assessment team is a key factor is quality repor

Book EPA National Publications Catalog

Download or read book EPA National Publications Catalog written by United States. Environmental Protection Agency and published by . This book was released on 2003 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Mercury study report to Congress

Download or read book Mercury study report to Congress written by and published by DIANE Publishing. This book was released on with total page 1811 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Mercury study report to Congress Vol 6

Download or read book Mercury study report to Congress Vol 6 written by and published by DIANE Publishing. This book was released on with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: