tailieunhanh - environmental engineering dictionary and directory phần 6

Tham khảo tài liệu 'environmental engineering dictionary and directory phần 6', ngoại ngữ, ngữ pháp tiếng anh phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | nappe 1 A sheet of water flowing over a weir or dam. 2 An arch-shaped sheet of rock forced over underlying rocks by internal stresses. napthalene A synthetic organic chemical used as a moth repellent and fungicide. Chemical formula is C10H8. Nara Paddle dryer processor by Komline-Sanderson Engineering Corp. NAS National Academy of Sciences. Nasty Gas Regenerative blowers to move noxious or other exotic gases by AMETEK Rotron Biofiltration. natality Birthrate. natality rate The number of births per thousand in a specific population. national ambient air quality standards NAAQS . standards established under the Clean Air Act to set limits on criteria pollutant levels in ambient outdoor air. National Contingency Plan NCP . federal regulations promulgated to implement CERCLA and CWA. National Emission Standards for Hazardous Air Pollutants NESHAP . standards established under CAA to set limits on pollutants which may pose an immediate hazard to human health. National Environmental Policy Act NEPA A 1969 . public law declaring a national policy that encourages productive and enjoyable harmony between people and their environment to enrich their understanding of ecological systems and natural resources. National Hydro Former equipment manufacturer acquired by Amwell Inc. National Oil and Hazardous Substances Contingency Plan NOHSCP The federal regulation that guides determination of the sites to be corrected under both the Superfund program and the program to prevent or control spills into surface waters or elsewhere. National Pollutant Discharge Elimination System NPDES A . program to issue monitor and enforce pretreatment requirements and discharge permits under the Clean Water Act. National Priorities List NPL A . federal list of hazardous waste sites addressed by CERCLA. National Water Quality Standards NWQS These set minimum requirements for water quality and require states to set standards to achieve CWA s water quality goals. natural attenuation