Global ETD Search
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Showing 1 to 18 of 18 for “"NPDES"”.
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Leveraging Technology to Add Value to a Phase II NPDES Permit
In 1999, Phase II of the National Pollutant Discharge Elimination System engaged operators of small Municipal Separate Storm Sewer Systems (MS4) in the control of runoff from urban areas. The complex task of urban runoff mitigation has been investigated for several decades, resulting in a large …
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Storm Water System Monitoring for the Small Municipality Under Phase II of the National Pollutant Discharge Elimination System
… National Pollutant Discharge Elimination System (NPDES) Phase II requirements, small municipalities are responsible for storm water impacts on receiving waters within their jurisdiction. For the purposes of NPDES Phase II requirements, small municipalities are identified as these municipalities …
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Use of Automated Sampler to Characterize Urban Stormwater Runoff in Pecan Creek
… for analysis was modeled after those used in the NPDES permit for seven cities within the Dallas/Ft.Worth metroplex. Some metals, notably cadmium and arsenic, exceeded the U.S. EPA's MCL's. Statistical analysis revealed first flush samples to be significantly more concentrated than composite …
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Regulatory and Economic Consequences of Empirical Uncertainty for Urban Stormwater Management
… Discharge Elimination Systems' Stormwater (NPDES SW), and Total Maximum Daily Load (TMDL) programs. These programs require that regulated entities reduce the discharge of pollutants from their storm drain systems to the "maximum extent practicable" (MEP), using a combination of structural …
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Evaluation Of Proprietary Stormwater Treatment Devices In Field And Laboratory Conditions
… National Pollution Discharge Elimination System (NPDES) permit requires that municipalities implement stormwater treatment techniques, known as Best Management Practices (BMPs). Unfortunately, the NPDES document suggests treatment to the maximum extent possible, a vague description at best. This …
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Development of Effective Procedures for Illicit Discharge Risk Mapping
… National Pollutant Discharge Elimination System (NPDES) stormwater program. Field reconnaissance is an effective measure to detect and identify illicit discharges, but requires substantial staff and financial resources to conduct. While risk analysis techniques and guidelines have been developed …
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The Impact of Different Stormwater Fee Types: A Case Study of Two Municipalities in Virginia
… complex stormwater regulations through the NPDES permit program. These fees can be created in a multitude of ways, including a flat fee for each parcel, charging by parcel area, charging based on a runoff factor, and many others. As a case study, eight SUFs were applied to the City of …
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Neoliberalism, the Environmental Protection Agency, and the Chesapeake Bay
… through cap and trade policies, such as NPDES permits, and legitimizes pollution-causing behavior through TMDLs. Further, the act was weakened by neoliberal forces with the non-point source exemption created for the sake of avoiding economic harm to large industries and its shortcomings …
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Understanding urban assets : using remote sensing to manage stormwater run-off
… National Pollutant Discharge Elimination System (NPDES). Phase II has caused several of these small communities to think about the effects of stormwater for the first time. At the same time new high-resolution satellite imagery, with resolutions ranging from 4 to 1 meter square, became available …
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Biological and physical treatment of crab processing industry wastewaters
… located. With the upcoming implementation of new NPDES discharge limits, this practice will no longer be possible. This study investigated the potential of two different technologies for treating the processing wastewaters. Bench-scale anaerobic contact type reactors were studied for effectiveness …
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Water Quality Aspects of an Intermittent Stream and Backwaters in an Urban North Texas Watershed
… at the future effluent flow of 21 MGD and at NPDES permitted loadings. Model results with application of a safety factor indicated that the maximum allowable concentrations for a 21 MGD discharge would be 2.3 mg/L of ammonia and 7.0 mg/L of biochemical oxygen demand at summer conditions. …
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An Ecotoxicological Assessment of a Treated Coal-mining Effluent in the Leading Creek Watershed, Meigs County, Ohio
… pollution discharge and elimination system (NPDES) permit testing. Currently, however, strong recommendations can only be made using Ceriodaphnia endpoints. Potential acute toxicity to aquatic organisms in high hardness solution (~790 mg/L as CaCO₃) is possible where sodium/sulfate-dominated …
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ANALYSIS OF DROUGHT ASSOCIATED IMPACTS ON THE CITY OF SAN BERNARDINO MUNICIPAL WATER DEPARTMENT’S WASTEWATER FLOW RATES AND CONSTITUENT CONCENTRATIONS
… National Pollutant Discharge Elimination System (NPDES) permit limits. Pearson Correlation Analyses were used to assess any relationships between influent flow rates and relevant constituents.</p> <p>WRP influent flow rates and TIN concentrations were the only two parameters explored by this …
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DESIGNING WATERSHED-SCALE STRUCTURAL BEST MANAGEMENT PRACTICES USING EVOLUTIONARY ALGORITHMS TO ACHIEVE WATER QUALITY GOALS
… National Pollution Discharge Elimination System (NPDES) program, under the auspices of the 1972 Clean Water Act (CWA). However, a large portion of the nation's water remains polluted, mainly due to non-point sources of pollution. The Total Maximum Daily Load (TMDL) program within the CWA regulates …
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Effectiveness of Municipal Collaboration for Watershed Management in the Southern Colorado River Basin
… National Pollutant Discharge Elimination System (NPDES) Municipal Separate Storm Sewer Systems (MS4) permits as issued by the United States Environmental Protection Agency (US EPA). A large body of literature argues for rethinking this scale because this does not match natural watershed …
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THE CHOICE OF WATER SUPPLY SOURCES FOR U.S. CITIES
… In general, the ESA, CWA 404 permit and NPDES permits were reported to be barriers to water source development, while the SDWA was most reported as an enabler. The research also found that water supply needs and planning choices vary by geographic region. Water systems in the West were …
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Essays in water resource economics
… National Pollutant Discharge Elimination System (NPDES) program established as part of the Clean Water Act (CWA). The contribution of this study lies in advancements in econometric strategy that allow a particularly difficult endogeneity problem to finally be addressed. Estimating the true impacts …
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Modeling of Land Use Change Effects on Storm Water Quantity and Quality in the City of Carrollton and the North Texas Area
Development and population are rapidly increasing in urbanizing areas of North Texas and so is the need to understand changes in storm water runoff flow and its contamination by nutrients, sediment, pesticides and other toxicants. This study contributes to this understanding and has two primary …