Government Reports Announcements & Index
Author :
Publisher :
Page : 1528 pages
File Size : 21,4 MB
Release : 1993
Category : Science
ISBN :
Alternatives for Managing the Nation's Complex Contaminated Groundwater Sites
Author : National Research Council
Publisher : National Academies Press
Page : 423 pages
File Size : 13,94 MB
Release : 2013-02-27
Category : Nature
ISBN : 0309278139
Book Description
Across the United States, thousands of hazardous waste sites are contaminated with chemicals that prevent the underlying groundwater from meeting drinking water standards. These include Superfund sites and other facilities that handle and dispose of hazardous waste, active and inactive dry cleaners, and leaking underground storage tanks; many are at federal facilities such as military installations. While many sites have been closed over the past 30 years through cleanup programs run by the U.S. Department of Defense, the U.S. EPA, and other state and federal agencies, the remaining caseload is much more difficult to address because the nature of the contamination and subsurface conditions make it difficult to achieve drinking water standards in the affected groundwater. Alternatives for Managing the Nation's Complex Contaminated Groundwater Sites estimates that at least 126,000 sites across the U.S. still have contaminated groundwater, and their closure is expected to cost at least $110 billion to $127 billion. About 10 percent of these sites are considered "complex," meaning restoration is unlikely to be achieved in the next 50 to 100 years due to technological limitations. At sites where contaminant concentrations have plateaued at levels above cleanup goals despite active efforts, the report recommends evaluating whether the sites should transition to long-term management, where risks would be monitored and harmful exposures prevented, but at reduced costs.
Onsite Wastewater Treatment Systems Manual
Author :
Publisher :
Page : 378 pages
File Size : 33,64 MB
Release : 2002
Category : Sewage
ISBN :
Book Description
"This manual contains overview information on treatment technologies, installation practices, and past performance."--Introduction.
Characterization, Modeling, Monitoring, and Remediation of Fractured Rock
Author : National Academies of Sciences, Engineering, and Medicine
Publisher : National Academies Press
Page : 177 pages
File Size : 44,58 MB
Release : 2021-01-29
Category : Science
ISBN : 0309373727
Book Description
Fractured rock is the host or foundation for innumerable engineered structures related to energy, water, waste, and transportation. Characterizing, modeling, and monitoring fractured rock sites is critical to the functioning of those infrastructure, as well as to optimizing resource recovery and contaminant management. Characterization, Modeling, Monitoring, and Remediation of Fractured Rock examines the state of practice and state of art in the characterization of fractured rock and the chemical and biological processes related to subsurface contaminant fate and transport. This report examines new developments, knowledge, and approaches to engineering at fractured rock sites since the publication of the 1996 National Research Council report Rock Fractures and Fluid Flow: Contemporary Understanding and Fluid Flow. Fundamental understanding of the physical nature of fractured rock has changed little since 1996, but many new characterization tools have been developed, and there is now greater appreciation for the importance of chemical and biological processes that can occur in the fractured rock environment. The findings of Characterization, Modeling, Monitoring, and Remediation of Fractured Rock can be applied to all types of engineered infrastructure, but especially to engineered repositories for buried or stored waste and to fractured rock sites that have been contaminated as a result of past disposal or other practices. The recommendations of this report are intended to help the practitioner, researcher, and decision maker take a more interdisciplinary approach to engineering in the fractured rock environment. This report describes how existing tools-some only recently developed-can be used to increase the accuracy and reliability of engineering design and management given the interacting forces of nature. With an interdisciplinary approach, it is possible to conceptualize and model the fractured rock environment with acceptable levels of uncertainty and reliability, and to design systems that maximize remediation and long-term performance. Better scientific understanding could inform regulations, policies, and implementation guidelines related to infrastructure development and operations. The recommendations for research and applications to enhance practice of this book make it a valuable resource for students and practitioners in this field.
Managing California's Water
Author : Ellen Hanak
Publisher : Public Policy Instit. of CA
Page : 500 pages
File Size : 42,46 MB
Release : 2011
Category : Business & Economics
ISBN : 1582131414
Book Description
The Nevada Test Site
Author : Emmet Gowin
Publisher : Princeton University Press
Page : 161 pages
File Size : 38,95 MB
Release : 2019-10-08
Category : Architecture
ISBN : 0691196036
Book Description
"Emmet Gowin likes to ask a provocative question: "Which country on earth has had the largest number of nuclear bombs detonated within its borders?" The answer is the United States. Covering approximately 680 square miles, the Nevada National Security Site, formerly known as the Nevada Test Site, was the primary testing location of American nuclear devices from 1951 to 1992; 1,021 announced nuclear tests occurred there, 921 of which were underground. The site, which is closed to the public, including its airspace, contains 28 areas, 1,100 buildings, 400 miles of paved roads, 300 miles of unpaved roads, 10 heliports, and two airstrips. Its surface is covered with subsidence craters from testing, and in places looks like the moon. In 1996, Gowin received permission to document the landscape by air, after over a decade of working to secure access. These aerial views of environmental devastation--made quietly majestic but no less potent in the hands of a master photographer--unveil environmental travesties on a grand scale. While groups of images from the Nevada Test Site series have been published previously, this book will produce the largest number yet, and three quarters of the pictures will not have been published at all. Gowin is the only photographer to have been granted access to this site, which is now permanently closed, post-9/11. Other than images made by the government for geographic purposes, no other images of this landscape exist. The book will feature a preface by photographer Robert Adams (America, b. 1937), whose photographic and written work is concerned with landscape, urbanization, and activism. It will also feature an afterword by Gowin on how he made the images, and their significance to him today."--Provided by publisher.
California Well Standards
Author :
Publisher :
Page : 124 pages
File Size : 32,76 MB
Release : 1991
Category : Groundwater
ISBN :
Book Description
Investigation of land subsidence and earth fissures in Cedar Valley, Iron County, Utah
Author : Paul Inkenbrandt
Publisher : Utah Geological Survey
Page : 122 pages
File Size : 27,53 MB
Release : 2014-03-12
Category : Base flow (Hydrology).
ISBN : 1557918910
Book Description
This 116-page report presents the results of an investigation by the Utah Geological Survey of land subsidence and earth fissures in Cedar Valley, Iron County, Utah. Basin-fill sediments of the Cedar Valley Aquifer contain a high percentage of fine-grained material susceptible to compaction upon dewatering. Groundwater discharge in excess of recharge (groundwater mining) has lowered the potentiometric surface in Cedar Valley as much as 114 feet since 1939. Groundwater mining has caused permanent compaction of fine-grained sediments of the Cedar Valley aquifer, which has caused the land surface to subside, and a minimum of 8.3 miles of earth fissures to form. Recently acquired interferometric synthetic aperture radar imagery shows that land subsidence has affected approximately 100 mi² in Cedar Valley, but a lack of accurate historical benchmark elevation data over much of the valley prevents its detailed quantification. Continued groundwater mining and resultant subsidence will likely cause existing fissures to lengthen and new fissures to form which may eventually impact developed areas in Cedar Valley. This report also includes possible aquifer management options to help mitigate subsidence and fissure formation, and recommended guidelines for conducting subsidence-related hazard investigations prior to development.
Managing aquifer recharge
Author : UNESCO
Publisher : UNESCO Publishing
Page : 366 pages
File Size : 14,26 MB
Release : 2021-11-25
Category : Political Science
ISBN : 9231004883
Book Description
Groundwater Quality
Author : Harriet Nash
Publisher : Springer
Page : 204 pages
File Size : 45,89 MB
Release : 1994-10-31
Category : Science
ISBN : 0412586207
Book Description
Groundwater quality monitoring and testing is of paramount importance both in the developed and developing world. This book presents a series of papers illustrating the varied nature of current research into groundwater quality. Urban and rural supplies are covered through a case history approach, and the importance of remedial action to prevent deterioration is emphasized.
