National Pollution Discharge Elimination System

The Clean Water Act (1972) requires discharge limits to be set on industrial and municipal wastewater, and these analyses are outlined in the National Pollution Discharge Elimination System for the 600 Series Methods. Method 624 covers the analysis of purgeable organic compounds Method 625 covers the analysis of 81 bases, neutrals, and acids Method 613 describes the analysis of dioxins and furans. 

National Pollutant Discharge Elimination System (NPDES)... 

The National Pollutant Discharge Elimination System (NPDES) is a cornerstone of the federal efforts to control water pollution (21). It determines what can be discharged to a pubHcly owned treatment plant. Indirect discharges may not be required to obtain an NPDES permit but must meet pretreatment effluent limitations and conditions of the NPDES permit of the treatment plant caimot be exceeded. 

BOD Biochemical oxygen demand NPDES National pollutant discharge elimination system... 

Enter the numbers of any permits your facility holds under the National Pollutant Discharge Elimination System (NPDES) even if the permit(s) do not pertain to the toxic chemical being reported. This 9-digit permit number is assigned to yourfacility by EPA orthe State under the authority of the Clean Water Act. If yourfacility does not have a permit, enter not applicable, NA, in box a. 

NPDES Permit National Pollutant Discharge Elimination System permit is the regulatory agency document issued by either a federal or state agency which is... 

There are two primary sources for aqueous pollution in this process—the condensate streams R] (1,000 kg/hr) and R2 (69,300 kg/hr). Both streams have the same supply composition, which corresponds to the solubility of benzene in water which is 1770 ppm (1.77 X10 kg bcnzcne/kg water). Consequently, they may be combined as a single stream. The target composition is 57 ppb as dictated by the VOC environmental regulations called NPDES (National Pollutant Discharge Elimination System). 

Mass Balance Estimates. Based on National Pollutant Discharge Elimination System monitoring reports, the total daily discharge of trace elements into the main stem Willamette River is of the order of 100 pounds per day. Seventy-five percent of the total is zinc with the bulk of the remainder due to chromium and copper. Table 6 identifies industrial and natural sources of trace elements into the Willamette basin. The table indicates that an average of 97 percent of all trace element loading to the basin is natural in origin. The natural component is due to weathering of soil and rocks in the basin and this... 

Effluent containing methyl parathion may not be discharged into lakes, streams, ponds, estuaries, oceans, or public waters unless the compound is specifically identified in a National Pollutant Discharge Elimination System (NPDES) permit. Moreover, discharge of effluent that contains methyl parathion is forbidden without prior notice to the sewage treatment plant authority (NPIRS 1986). 

Pollution prevention practices have become part of the U.S. National Pollutant Discharge Elimination System (NPDES) program, working in conjunction with best management practices (BMPs) to reduce potential pollutant releases. Pollution prevention methods have been shown to reduce costs as well as pollution risks through source reduction and recycling/reuse techniques.5... 

Direct discharges are discharges from point sources into surface water pursuant to a National Pollutant Discharge Elimination System (NPDES) permit. NPDES permits are granted on a case-by-case basis and limit the permissible concentration of toxic constituents or conventional pollutants in effluents discharged to a waterway. These limits are generally established on the basis of the best available treatment technology and, where necessary, to protect surface water quality standards. 

The water may be discharged to a natural water course where dilution and exposure to oxygen will reduce the hazards of its dissolved gasoline constituents. In such a case, a National Pollutant Discharge Elimination System permit and a State Pollutant Discharge Elimination System permit must be obtained. 

There are two industry-specific components of the CWA requirements the NPDES (National Pollutant Discharge Elimination System) permitting and pretreatment programs. Other general CWA requirements, such as those for wetlands and stormwater, may also apply to pulp and paper mills. 

U.S. EPA, National Pollutant Discharge Elimination System Secondary Treatment Standards. U.S. Environmental Protection Agency, Washington, DC, 2002. Available at http //efpub.epa.gov/npdes/ techbasedpermiting/sectreat.ofm. 

National Pollutant Discharger Elimination System (NPDES), 9 794 25 917 permit program, 21 582 standards, 6 828... 

NPDES = National Pollutant Discharge Elimination System NTP = National Toxicology Program OSHA = Occupational Safety and Health Administration OW = Office of Water PCB = Polychlorinated Biphenyl RfD = Reference Dose STEL = Short-term Exposure Limit TLV = Threshold Limit Value TSCA = Toxic Substances Control Act TWA = Time Weighted Average WHO = World Health Organization... 

EPA. 1979b. Criteria and standards for the national pollutant discharge elimination system. U.S. Environmental Protection Agency. Code of Federal Regulations. 40 CFR 125. 

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