Download or read book Arsenic Concentrations in Ground Water from Study Unit Survey Wells Page 31 Correction written by and published by . This book was released on 1997* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Arsenic Concentrations in Bedrock Wells in Colchester East Hampton and Woodstock Connecticut written by Craig James Brown and published by . This book was released on 2002 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Arsenic in Ground water Resources of the United States written by and published by . This book was released on 2000 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Arsenic Concentrations in Private Bedrock Wells in Southeastern New Hampshire written by and published by . This book was released on 2003 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Relation of Arsenic Iron and Manganese in Ground Water to Aquifer Type Bedrock Lithogeochemistry and Land Use in the New England Coastal Basins written by and published by . This book was released on 1999 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Retrospective Analysis on the Occurrence of Arsenic in Ground water Resources of the United States and Limitations in Drinking water supply Characterizations written by and published by . This book was released on 2000 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Arsenic in Ground Water written by Alan H. Welch and published by Springer Science & Business Media. This book was released on 2007-05-08 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interest in arsenic in ground water has greatly increased in the past decade because of the increased awareness of human health effects and the costs of avoidance or treatment of ground water supplies used for consumption. The goal of this book is to provide a description of the basic processes that affect arsenic occurrence and transport by providing sufficient background information on arsenic geochemistry and descriptions of hi- arsenic ground water, both affected and unaffected by human activity. An understanding of thermodynamics, adsorption, and the speciation of arsenic in solid phases, which are described in first three chapters, is needed to predict the fate of arsenic in ground water systems. Large-scale and deep movement of ground water can and has redistributed arsenic in the near surface environment, as described in the next two chapters. These large-scale systems can affect large volumes of both ground water and surface water, such as in the Yellowstone system, and can produce mineralised zones that subsequently release arsenic to ground water supplies. Regional identification of high-arsenic ground water and its consumption as described in the next three chapters clearly demonstrates a need for increased wat- quality monitoring, particularly in south and southeast Asia. Chapters 9-11 provide examples of high arsenic ground water associated with sulfide mineral oxidation and alkaline conditions. Finally, smaller scale studies of the effects of human activities that have produced high-arsenic ground water and methods for attenuation of ground water are presented.
Download or read book Arsenic in Illinois Ground Water written by Kelly L. Warner and published by . This book was released on 2003 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Arsenic and Uranium in Water from Private Wells Completed in Bedrock of East Central Massachusetts written by John A. Colman and published by . This book was released on 2011 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Arsenic Concentrations Related Environmental Factors and the Predicted Probability of Elevated Arsenic in Groundwater in Pennsylvania written by Eliza L. Gross and published by CreateSpace. This book was released on 2014-06-15 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analytical results for arsenic in water samples from 5,023 wells obtained during 1969–2007 across Pennsylvania were compiled and related to other associated groundwater- quality and environmental factors and used to predict the prob- ability of elevated arsenic concentrations, defined as greater than or equal to 4.0 micrograms per liter (µg/L), in ground- water. Arsenic concentrations of 4.0 µg/L or greater (elevated concentrations) were detected in 18 percent of samples across Pennsylvania; 8 percent of samples had concentrations that equaled or exceeded the U.S. Environmental Protection Agen- cy's drinking-water maximum contaminant level of 10.0 µg/L. The highest arsenic concentration was 490.0 µg/L.
Download or read book Development of Phosphate Resources in Southeastern Idaho written by Geological Survey (U.S.) and published by . This book was released on 1977 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Groundwater Arsenic Concentrations and Cancer Incidence Rates written by Harmony S. Fleming and published by . This book was released on 2007 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Arsenic contamination of groundwater is a global issue with national and local implications. Chronic exposure to arsenic in drinking water has been linked to both carcinogenic and non-carcinogenic health outcomes. The primary exposure route of inorganic arsenic is ingestion from drinking water due to natural contamination in groundwater from dissolution of natural mineral deposits and anthropogenic sources. The purpose of this study was to determine if there is a spatial relationship between groundwater arsenic concentrations and cancer incidences within two regions of Oregon. The objectives of this study were to: (1) determine if there is a spatial relationship between arsenic concentrations in the Willamette Valley and Southeast Oregon and incidence rates of bladder, kidney, liver and lung cancers; (2) contribute to the Centers for Disease Control and Prevention's development of the Environmental Public Health Tracking network by using secondary data to investigate linkages of arsenic in groundwater and associated health effects; and (3) serve as an exploratory tool for identifying a public health concern that can be followed up with comprehensive analytical studies of the region. The study used four secondary data sets: Cancer data from the Oregon State Cancer Registry; community water system arsenic data from the Oregon Department of Human Services Drinking Water Program; groundwater arsenic data from the U.S. Geological Survey National Water Inventory System; and population data from the U.S. Census Bureau. Data set were combined and then analyzed with statistical and spatial analysis methods. This study did incur challenges of data compatibility and required extensive data preparation activities of several of the data sets. One such data manipulation was the integration of two independent sources of water quality data which had not been done before in Oregon and may not have accurately defined the exposure risk of sub-populations. Another limitation was that missing cases due to geocoding were more likely to be in rural census tracts due to the P.O. Box and Rural Route addresses, thus possibly contributing to an underestimation of the number of cancer cases used in the study analyses. Results indicate several significant differences of risk between demographic and arsenic concentration intervals. However, the inherent limitations of secondary data have produced some unexpected results. Using the arsenic Quintile 1 (0 - 0.9 ug/L) as a reference point, the results showed that arsenic concentration levels in groundwater do not impact the incidence rates of bladder, kidney, liver or lung cancer in populations over the age of 40 in regions with arsenic concentrations above 1 ug/L. Further, although cancer incidence rates might be expected to increase with increasing groundwater arsenic concentrations in Quintiles 3, 4 and 5, the results in this study show otherwise. Maps of the study regions depicting arsenic concentration levels in groundwater show that arsenic is widely distributed but concentration levels can vary greatly between census tracts located in close proximity. The distribution of arsenic in the region may be affected by geological formations that are known to be associated with higher arsenic levels. Follow-up studies are recommended for regions of the state that were found to have arsenic concentration at or above the current MCL regulated by the Safe Drinking Water Act. Rural regions of the state that rely on private groundwater wells not regulated by the federal standard would also be appropriate. Results of this study will be shared with the Oregon Environmental Public Health Tracking network, their research partners and other interested state and local agencies.
Download or read book Some Drinking water Disinfectants and Contaminants Including Arsenic written by IARC Working Group on the Evaluation of Carcinogenic Risks to Humans and published by IARC. This book was released on 2004 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: A working group of 23 experts from 13 countries met in Lyon to evaluate the evidence for carcinogenicity of arsenic (mostly naturally occurring) as a contaminant of drinking-water, and of the water-disinfectant chloramine. The working group also evaluated or re-evaluated four chlorination by-products found in drinking-water, namely chloral hydrate, di- and trichloroacetic acids, and 3-chloro-4-(dichloromethyl)-5-hydroxy-2(5H)-furanone (also known as MX). High-level exposure to arsenic in drinking-water occurs in some regions such as China, Latin America, Bangladesh and West Bengal. The Working Group reviewed epidemiological studies of human cancer (mainly ecological studies in Taiwan and Chile, and several case-control and cohort studies) in relation to arsenic in drinking-water. Arsenic in drinking-water (primarily inorganic, as arsenate and to a lesser extent arsenite) was evaluated as carcinogenic to humans (Group 1) on the basis of sufficient evidence for an increased risk for cancer of the urinary bladder, lung and skin. Studies on inorganic arsenic in experimental animals provided limited evidence for its carcinogenicity, but sufficient evidence was found in experimental animals for the carcinogenicity of dimethylarsinic acid (an organic form of arsenic), which produced urinary bladder tumours in rats and lung tumours in mice after oral administration.
Download or read book Scientific Investigations Report written by Sharon E. Kroening and published by . This book was released on 2004 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Brackish Groundwater in the United States written by Jennifer S. Stanton and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book California Water Plan Update written by California. Department of Water Resources and published by . This book was released on 1994 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Non transient Non community Water Systems written by and published by . This book was released on 1995 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
