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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 96 for “"USEPA"”.
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A Comparative Microbial Composition Assessment of Stormwater, Urban Runoff and Wastewater
… FIB recovery efficiency by two varieties of USEPA-approved, culture-based laboratory methods in each type of water. The two types of methods were the IDEXX Quanti-Tray technique and the USEPA membrane filtration methods 1603 and 1600. All results showed the expected reduction of FIB densities …
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Hydrodynamic and Water Quality Simulation of Fecal Coliforms in the Lower Appomattox River, Virginia
… United States Environmental Protection Agency (USEPA) has listed the lower Appomattox River as impaired because it violates current water quality standards for fecal coliforms. To advance the analytical process by which various scenarios for improving water quality within the estuary are …
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Leaching behaviors of heavy metals on petroleum sludge waste treatment by using solidification/stabilization (s/s) method with palm oil fuel ash as partial cement replacement
… United States Environmental Protection Agency (USEPA) standards. The heavy metals in PS, POFA and OPC were determined using X-ray Fluorescence (XRF) meanwhile dissolved heavy metals using Inductively Coupled Plasma Mass Spectrometry (ICP-MS). Addition test such as compressive strength test, …
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Occurrence, monitoring and removal of drinking water contaminants by advanced technologies
… water primary standards compliance under the USEPA Stage 2 Disinfectant Disinfection Byproducts Rule, drinking water treatment plants (DWTPs) are switching from free chlorine (FC) to chloramines (MCA). Concerns are raised as MCA disinfection has been linked N-nitrosamine formation. …
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Geospatial Trends of Per- and Polyfluoroalkyl Substances (PFAS) Incidence in Private Drinking Water in Virginia
… United States Environmental Protection Agency (USEPA) has established mandatory monitoring campaigns and future maximum contaminant levels (MCLs) for two PFAS compounds (PFOA and PFOS) in public water systems under the Safe Drinking Water Act. However, the 20-40 million Americans who rely on …
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A study of leaching tests for cement stabilised waste
… Characteristic Leaching Procedure (TCLP, USEPA Method 1310); column testing included small columns (internal diameter = 24mm) and a large column (internal diameter = 500mm); and dynamic leaching tests were run with both short (1 hour) and long (4 hour) leachant renewal frequencies. A …
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Les contributions de la coagulation rehaussée et de la communication dans l'approvisionnement en eau potable
… américaine de protection de l'environnement (USEPA) a promulgué, en novembre 1998, une nouvelle règle : la règle des désinfectants/sous-produits de désinfection (D/DBP). Dans cette règle, l'USEPA recommande d'éliminer la matière organique naturelle de l'eau avant le processus de désinfection, …
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Evaluation of Metal Concentration in Water and Soil in the Southern Region of Lake Nacogdoches
… June 2019. Water samples were analyzed using the USEPA method 200.8 part 11.2 for total recoverable metals. Soil samples were analyzed using the USEPA method 3050B for total recoverable metals. Although the total concentration gives some indication of the level of contamination, it is not enough …
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Community-based evaluation of the air toxic provisions of title III of the 1990 clean air act amendments : risks, costs and benefits
… the U.S. Environmental Protection Agency (USEPA) to use technology-based air pollution control measures to significantly reduce emissions of HAPs from major sources of air pollution, followed by a risk-based assessment to address any remaining or residual health risks. This study …
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The Occurrence and Control of Disinfection By-Products (DBPs) in Two Water Treatment Plants Utilizing the Same Source
… led the U.S. Environmental Protection Agency (USEPA) to set a maximum contaminant level (MCL) for total THMs and HAAs. The disinfectant/disinfection by-product rule (D-DBP Rule) currently proposed by the USEPA will lower the MCL for THMs and HAAs. Past and pending DBP regulations have provided …
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Spatial Analysis of Atrazine in the Elm Fork Watershed
… 3 µg/Lthe Maximum Contaminant Level set by the USEPA. However, three creek stations had four-quarter average concentrations greater than 3 µg/L, and virtually all samples exceeded the 0.1 µg/L standard set in Europe [1,2]. Statistically significant differences in concentrations were detected …
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Characterization of Unregulated Disinfection By-Products (DBPs) in Chloraminated Water and Estimation of Associated Health Risks
… regulated by US Environmental Protection Agency (USEPA). Chloramine is used more and more widely in drinking water utilities as a secondary disinfectant since it can significantly reduce the formation of regulated DBPs. However, chloramination could produce more unregulated DBPs formation than …
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Moderately-rapid assessment of alkaline desiccation environmental systems
… United States Environmental Protection Agency (USEPA) limit. Alkalinity, not pH, was determined to be the limiting factor in some waste samples, resulting in the need to dilute the waste with local soils. Designs were developed to reduce the unnecessarily long detention times between 0.75 to 4.4 …
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Availability and distribution of heavy metals from sewage sludge in the plant-soil continuum
… Ap horizon even when Cu was applied in excess of USEPA guidelines. Although there were increases in metal levels, all four metals were within the range considered normal for corn and barley growth. Soil, corn, and barley plants were sampled in 1984 and 1985 to determine Cd, Cr, Cu, Ni, and Zn …
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Environmental Performance of Copper Slag and Barshot as Abrasives
… Region Maritime technology Center (GCRMTC) and USEPA. It was undertaken to simulate actual blasting operations conducted at shipyards under enclosed, un-controlled conditions on plates similar to steel plates commonly blasted at shipyards.
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A Re-Evaluation of the US EPA Radon Risk Categorization for Unicoi County, Tennessee.
… significantly higher than those measured in the USEPA study (avg. 1.96 ± 1.08). Using this study’s data, the risk categorization was recalculated with the US EPA Radon Index Matrix Model. The model re-categorized Unicoi County from a moderate to a high risk zone classification. These results …
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Salinity, radon, and radon precursors in the soils of Grand Forks County, North Dakota
… United States Environmental Protection Agency (USEPA) action limit of 4 pCi/l. High radon levels may pose a health threat (USEPA, 1986) to valley residents. </p><p>A review of existing data indicates that areas of the Red River Valley in North Dakota with elevated soil salinity also exhibit …
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Implications of Bottled Water Use in Rural Central Appalachia
… United States Environmental Protection Agency (USEPA) standards and guidelines. Approximately 71 percent of homes reported bottled water as their primary drinking water source. Bottled water samples did not exceed any USEPA health-based regulations. The presence of inorganic ions contaminants …
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Environmental Performance of Steel Grit and Specialty Sand as Abrasives
… Region Maritime technology Center (GCRMTC) and USEPA. It simulated actual blasting operations conducted at shipyards under enclosed, controlled conditions on plates similar to steel plates commonly blasted at shipyards. The emissions were measured using EPA Source Test Method to quantify …
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ONLINE MONITORING OF NITROGEN GREENHOUSE GASES FROM WATER RECLAMATION PLANTS
… established prototype modified based on the USEPA standard method for the in-situ measurement of the surface gas emission has been used for a group of real-time online monitoring at full-scale BNR reactors at two WRPs in Singapore ? Changi Water Reclamation Plant and Ulu Pandan Water …
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