Download or read book Selenium and Mercury Concentrations in Fish Wolford Mountain Reservoir Colorado 2005 written by Nancy J. Bauch and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Southern Delivery System written by and published by . This book was released on 2008 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Comparative Study of Mercury and Selenium Concentrations in Fish Tissues of the Fountain Creek Watershed Colorado USA written by Catherine M. McGarvy and published by . This book was released on 2011 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: To date there have been no published studies done on heavy metal content in fish tissues of the Fountain Creek Watershed Colorado, despite several instances of waste dumping and an increase in urbanization of the area. Six different fish species were collected throughout the watershed at fourteen different sites by way of electroshocking. Each fish was measured, weighed, and examined internally for gravidity. If the fish was determined to be a gravid female; liver, ovary, muscle, and skin tissues were collected for analysis. The rest of the fish, as well as those that were not gravid, were then processes into a homogenized slurry by using a blender. The slurry was then dried and transferred to Teflon tubes before ICP-MS analysis. Mercury concentrations were highest in Upper Fountain Creek (UF-sites), and Monument Creek (MC-sites); ranging from a mean of 284.5 μg/kg at MC-1 and decreased in mean concentration as elevation decreased to a low mean of 59.3 μg/kg at LF-2. The UF-sites and MC-sites showed lower concentrations of selenium ranging from 7.55 μg/kg at UF-2 and increased as elevation decreased to the lowest mean of 9.51 μg/kg at LF-4. This trend was shown with whole-body homogenate concentrations as well as individual tissue-type concentrations were consistently higher in muscle tissue where as selenium concentrations were higher in ovarian tissue. The data suggest accumulation of mercury and selenium is occurring within the icthyofauna of the Fountain Creek Watershed; however, more research is needed to determine if the effects are detrimental to any of the six fish species studied.
Download or read book Mercury Concentrations in Water and Mercury and Selenium Concentrations in Fish from Brownlee Reservoir and Selected Sites in Boise and Snake Rivers Idaho and Oregon 2013 written by Dorene E. MacCoy and published by . This book was released on 2014 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mercury (Hg) analyses were conducted on samples of sport fish and water collected from six sampling sites in the Boise and Snake Rivers, and Brownlee Reservoir to meet National Pollution Discharge and Elimination System (NPDES) permit requirements for the City of Boise, Idaho. A water sample was collected from each site during October and November 2013 by the City of Boise personnel and was analyzed by the Boise City Public Works Water Quality Laboratory. Total Hg concentrations in unfiltered water samples ranged from 0.73 to 1.21 nanograms per liter (ng/L) at five river sites; total Hg concentration was highest (8.78 ng/L) in a water sample from Brownlee Reservoir. All Hg concentrations in water samples were less than the EPA Hg chronic aquatic life criterion in Idaho (12 ng/L). The EPA recommended a water-quality criterion of 0.30 milligrams per kilogram (mg/kg) methylmercury (MeHg) expressed as a fish-tissue residue value (wet-weight MeHg in fish tissue). MeHg residue in fish tissue is considered to be equivalent to total Hg in fish muscle tissue and is referred to as Hg in this report. The Idaho Department of Environmental Quality adopted the EPA's fish-tissue criterion and a reasonable potential to exceed (RPTE) threshold 20 percent lower than the criterion or greater than 0.24 mg/kg based on an average concentration of 10 fish from a receiving waterbody. NPDES permitted discharge to waters with fish having Hg concentrations exceeding 0.24 mg/kg are said to have a reasonable potential to exceed the water-quality criterion and thus are subject to additional permit obligations, such as requirements for increased monitoring and the development of a Hg minimization plan. The Idaho Fish Consumption Advisory Program (IFCAP) issues fish advisories to protect general and sensitive populations of fish consumers and has developed an action level of 0.22 mg/kg wet weight Hg in fish tissue. Fish consumption advisories are water body- and species-specific and are used to advise of allowable fish consumption from specific water bodies. The geometric mean Hg concentration of 10 fish of a single species collected from a single water body (lake or stream) in Idaho is compared to the action level to determine if a fish consumption advisory should be issued. The U.S. Geological Survey collected and analyzed individual fillets of mountain whitefish (Prosopium williamsoni), smallmouth bass (Micropterus dolomieu), and channel catfish (Ictalurus punctatus) for Hg. The median Hg concentration of 0.32 mg/kg exceeded the Idaho water-quality criterion at the site in Brownlee Reservoir. Average Hg concentrations from Brownlee Reservoir (0.32 mg/kg) and the Boise River at mouth (0.33 mg/kg) exceeded the Hg RPTE threshold (>0.24 mg/kg). IFCAP action levels also were exceeded at the sites on Brownlee Reservoir and at the mouth of the Boise River. Median Hg concentrations in fish at the remaining four river sites were less than 0.20 mg/kg with average concentrations ranging from 0.14 to 0.21 mg/kg Hg. Selenium (Se) analysis also was conducted on one composite fish tissue sample per site to screen for general concentrations and to provide information for future risk assessments. Concentrations of Se ranged from 0.07 to 0.49 mg/kg wet weight; average concentrations were highest in smallmouth bass (0.40 mg/kg) and lowest in mountain whitefish (0.12 mg/kg).
Download or read book Mercury Concentrations in Water and Mercury and Selenium Concentrations in Fish from Brownlee Reservoir and Selected Sites in the Boise and Snake Rivers Idaho and Oregon 2013 15 written by Marshall L. Williams and published by . This book was released on 2016 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mercury (Hg) analyses were conducted on samples of sport fish and water collected from selected sampling sites in Brownlee Reservoir and the Boise and Snake Rivers to meet National Pollution Discharge and Elimination System (NPDES) permit requirements for the City of Boise, Idaho, between 2013 and 2015. City of Boise personnel collected water samples from six sites between October and November 2013 and 2015, with one site sampled in 2014. Total Hg concentrations in unfiltered water samples ranged from 0.48 to 8.8 nanograms per liter (ng/L), with the highest value in Brownlee Reservoir in 2013. All Hg concentrations in water samples were less than the U.S. Environmental Protection Agency (USEPA) Hg chronic aquatic life criterion of 12 ng/L. The USEPA recommended a water-quality criterion of 0.30 milligrams per kilogram (mg/kg) methylmercury (MeHg) expressed as a fish-tissue residue value (wet-weight MeHg in fish tissue). The Idaho Department of Environmental Quality adopted the USEPA's fish-tissue criterion and established a reasonable potential to exceed (RPTE) threshold 20 percent lower than the criterion or greater than 0.24 mg/kg Hg based on an average concentration of 10 fish from a receiving waterbody. NPDES permitted discharge to waters with fish having Hg concentrations exceeding 0.24 mg/kg are said to have a reasonable potential to exceed the water-quality criterion and thus are subject to additional permit obligations, such as requirements for increased monitoring and the development of a Hg minimization plan. The Idaho Fish Consumption Advisory Program (IFCAP) issues fish advisories to protect general and sensitive populations of fish consumers and has developed an action level of 0.22 mg/kg Hg in fish tissue. Fish consumption advisories are water body- and species-specific and are used to advise allowable fish consumption from specific water bodies. The geometric mean Hg concentration of 10 fish of a single species collected from a single water body (lake or stream) in Idaho is compared to the action level to determine if a fish consumption advisory should be issued. The U.S. Geological Survey collected and analyzed individual fillets of mountain whitefish (Prosopium williamsoni), rainbow trout (Oncorhynchus mykiss), smallmouth bass (Micropterus dolomieu), and channel catfish (Ictalurus punctatus) for Hg. The 2013 average Hg concentration for small mouth bass (0.32 mg/kg) collected at Brownlee Reservoir and for channel catfish (0.33 mg/kg) collected at the Boise River mouth, exceeded the Idaho water quality criterion (>0.3 mg/kg), the Hg RPTE threshold (>0.24 mg/kg), and the IFCAP action level (>0.22 mg/kg). Average Hg concentrations in fish collected in 2014 or 2015 did not exceed evaluation criteria for any of the species assessed. Selenium (Se) analysis was conducted on one composite fish tissue sample per site to assess general concentrations and to provide information for future risk assessments. Composite concentrations of Se in fish tissue collected between 2013 and 2015 ranged from 0.07 and 0.49 mg/kg wet weight with the highest concentration collected from smallmouth bass from the Snake River near Murphy, and the lowest from mountain whitefish from the Boise River at Eckert Road.
Download or read book Mercury Concentrations in Fish from Pueblo Reservoir written by Lucia Machado and published by . This book was released on 2005 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Great Salt Lake Biology written by Bonnie K. Baxter and published by Springer Nature. This book was released on 2020-07-03 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: Great Salt Lake is an enormous terminal lake in the western United States. It is a highly productive ecosystem, which has global significance for millions of migrating birds who rely on this critical feeding station on their journey through the American west. For the human population in the adjacent metropolitan area, this body of water provides a significant economic resource as industries, such as brine shrimp harvesting and mineral extraction, generate jobs and income for the state of Utah. In addition, the lake provides the local population with ecosystem services, especially the creation of mountain snowpack that generates water supply, and the prevention of dust that may impair air quality. As a result of climate change and water diversions for consumptive uses, terminal lakes are shrinking worldwide, and this edited volume is written in this urgent context. This is the first book ever centered on Great Salt Lake biology. Current and novel data presented here paint a comprehensive picture, building on our past understanding and adding complexity. Together, the authors explore this saline lake from the microbial diversity to the invertebrates and the birds who eat them, along a dynamic salinity gradient with unique geochemistry. Some unusual perspectives are included, including the impact of tar seeps on the lake biology and why Great Salt Lake may help us search for life on Mars. Also, we consider the role of human perceptions and our effect on the biology of the lake. The editors made an effort to involve a diversity of experts on the Great Salt Lake system, but also to include unheard voices such as scientists at state agencies or non-profit advocacy organizations. This book is a timely discussion of a terminal lake that is significant, unique, and threatened.
Download or read book River of Lost Souls written by Jonathan P. Thompson and published by Torrey House Press. This book was released on 2018-03-06 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A vivid historical account…Thompson shines in giving a sense of what it means to love a place that's been designated a 'sacrifice zone.'" —PUBLISHERS WEEKLY Award–winning investigative environmental journalist Jonathan P. Thompson digs into the science, politics, and greed behind the 2015 Gold King Mine disaster, and unearths a litany of impacts wrought by a century and a half of mining, energy development, and fracking in southwestern Colorado. Amid these harsh realities, Thompson explores how a new generation is setting out to make amends. JONATHAN THOMPSON is a native Westerner with deep roots in southwestern Colorado. He has been an environmental journalist focusing on the American West since he signed on as reporter and photographer at the Silverton Standard & the Miner newspaper in 1996. He has worked and written for High Country News for over a decade, serving as editor–in–chief from 2007 to 2010. He was a Ted Scripps fellow in environmental journalism at the University of Colorado in Boulder, and in 2016 he was awarded the Society of Environmental Journalists' Outstanding Beat Reporting, Small Market. He currently lives in Bulgaria with his wife Wendy and daughters Lydia and Elena.
Download or read book Water Law in a Nutshell written by David H. Getches and published by West Academic Publishing. This book was released on 1997 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reliable source on water law contains updated court decisions from hundreds of case and statutory changes in several states. There is an added discussion on surface use of waters in light of the increased importance of public recreational water uses. Throughout the edition, where appropriate, analysis expands on the subjects of instream flow protection, water quality, and public-interest concerns in water use and water collection.
Download or read book Citizen s Guide to Colorado Water Law written by Gregory Hobbs and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This useful desk reference, authored by Justice Gregory Hobbs Jr., explores the basics of Colorado water law, how it developed, and how it is applied today. Readers can learn more about surface water and groundwater allocation and regulation, understand concepts such as interstate compacts, or read about how a "call" for water works.
Download or read book EPA Enforcement written by United States. Environmental Protection Agency and published by . This book was released on 1972 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Antimicrobials in Food written by P. Michael Davidson and published by CRC Press. This book was released on 2005-04-28 with total page 721 pages. Available in PDF, EPUB and Kindle. Book excerpt: Twelve years have passed since its last edition - making Antimicrobials in Foods, Third Edition the must-have resource for those interested in the latest information on food antimicrobials. During that time, complex issues regarding food preservation and safety have emerged. A dozen years ago, major outbreaks of Escherichia coli O157:H7 and Listeri
Download or read book Arkansas River Compact written by United States. Congress. House. Committee on Public Lands. Subcommittee on Irrigation and Reclamation and published by . This book was released on 1949 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phonetics Theory and Application written by William R. Tiffany and published by McGraw-Hill Humanities, Social Sciences & World Languages. This book was released on 1977 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook Ground Water Ground water and contamination written by and published by . This book was released on 1990 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Profile of the Healthcare Industry written by and published by . This book was released on 2005 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Thinking Person s Guide to Climate Change written by Robert Henson and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book is derived from material originally published as The rough guide to climate change"--Copyright page.
