Global ETD Search
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 10 of 10 for “"EPA standards"”.
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Locomotive emissions effects due to engine configuration
… locomotive engine could be made to meet the EPA Tier 0 emissions limits without a substantial loss in fuel economy by retarding the injection timing and installing a more efficient turbocharger. The first locomotive was equipped with a Turbo and Compressor Maintenance LLC. Inc., or TCM, …
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Ozone air pollution and stage-of-change status for alternative transportation usage among college students
Non-attainment of EPA standards for ozone (O3) is the most common air pollution problem facing large cities in the U.S. In 1999, approximately 184.5 million U.S. residents lived in areas with unhealthful O3 levels. Minority and disadvantaged populations are disproportionately represented in these …
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Abandoned Mine Land Impacts on Tributaries in the Upper Yakima River Watershed, Eastern Cascades, Washington
… the AMLs are sources of pollution as defined by EPA drinking water standards. Results show that mill sites in the Cle Elum and Teanaway River drainages are contributing small amounts of heavy metals to their surrounding environment. Analysis using modified USGS mine waste characterization …
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Investigation of the Distribution of Lead (Pb) in Soil in Rochester, NY: Correlation with Children’s Blood Lead Levels
… average concentration of 288 ppm, a value below EPA standards for “residential play areas” (400 ppm) but well above literature suggestions. A prevalence rate for lead poisoning in children ages 5 and under was determined and compared to experimentally determined lead concentrations along with …
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METAL AND WOODEN SHIPWRECKS: UNDERSTANDING THE RELATIONSHIP BETWEEN HEAVY METALS, ENVIRONMENTAL FACTORS, AND MICROBIAL COMMUNITIES
… community structure and diversity. Based on EPA standards, the heavy metals to be concerned about at are chromium and lead and people interacting with this environment should limit time spent directly inside or around the wrecks to less than eight hour a day, five days a week.
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Manganese in Private Drinking Water Systems: A Statewide Assessment of Virginia
… United States Environmental Protection Agency (EPA) regulates Mn in public water systems with a Secondary Maximum Contaminant Level (SMCL) of 0.05 mg/L for aesthetic concerns and a Health Advisory Limit (HAL) of 0.3 mg/L for lifetime exposure. Despite EPA standards for public systems, private …
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Wildlife Use of Wastewater Ponds at the Idaho National Engineering Laboratory
… did not contain metals.in amounts greater than EPA standards. Nutrients (nitrogen and phosphorous) were high in sewage ponds, which resulted in higher numbers of invertebrates than in industrial waste ponds. Small mammals were live trapped at 6 ponds in July 1991. Common deer mice and Ord's …
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Evaluation of Heavy Metals and Metalloid Accumulation in a Small-Scale Aquaponic System and an Effect on Bacterial Antibiotic Resistance
… of the U.S Environmental Protection Agency (U.S EPA) standards that dictate the maximum contaminant level (MCL) for drinking water. Work determined the concentrations, distribution, and the fractions of the applied HMs in the water, fish, plant, and sediment. The potential effect of the HMs …
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Removal of Heavy Metals from Drinking Water by Adsorption onto Limestone with a Focus on Copper and Aluminum Applications
… reduce select metals to below drinking water standards.</p>
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Impacts of artisanal and large scale gold mining on tropical rivers in West Africa: A case study from the Brong Ahafo Region of Ghana
… sediment controls exceeded the Ghanaian and US EPA standards for the protection of aquatic life as well as that of Ghanaian raw water to be processed as drinking water. ASGM also significantly elevated the concentrations of salt ions and sulfate in river water particularly due to discharges of …