Search Results for the EPA National Library Catalog

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Nitrogen and irrigation management to reduce return-flow pollution in the Columbia Basin / 1976
Nitrogen and phosphorus in wastewater effluents, working paper no. 22, a prelim. analysis of Nat. Eutrophication Survey data collected during the 1972-73 sampling period. 1974
Nitrogen and phosphorus losses from agronomy plots in North Alabama / 1974
Nitrogen dioxide, time-concentration model to predict acute foliar injury / 1979
Nitrogen in Industry. 1971
Nitrogen Removal and Identification for Water Quality Control. 1971
Nitrogen removal from wastewaters 1970
Nitrogen Removal from Wastewaters. 1970
Nitrogen Turnover in Impoundments. 1973
Nitrogen-ammonia/nitrate/nitrite : water quality standards criteria summaries a compilation of state/federal criteria / 1988
Nitrogenous compounds in the environment. 0
Nonpoint Source Control Guidance, Construction Activities. 1976
North Carolina barrier islands wastewater management : final environmental impact statement / 1984
North Waubay Lake, Day County, South Dakota. 1976
Northboro, Hudson, Maynard, and Billerica Impoundments, Worcester and Middlesex Counties, Massachusetts. 1975
NTA and mercury in artificial stream systems / 1974
Nutrient Enrichment of Runoff Waters by Soils. Phase I: Phosphorus Enrichment Potential of Urban Soils in the City of Madison. 1972
Nutrient Limitation and Adaption of Microbial Populations to Chemical Transformations. 1986
Nutrient Management. Supplement to the Journal of Soil and Water Conservation Volume 49, Number 2. 1994
Nutrient Regeneration by Zooplankton in Southern Lake Huron. 1983
Nutrient Removal from Wastewater by Physical-Chemical Processes. 1971
Nutrient transport by sediment-water interaction. 1973
Nutrient, bacterial, and virus control as related to ground-water contamination / 1977
Nutrients from Tile Drainage Systems. 1971
Nutritional Requirements of the Submerged Angio-Sperm 'Ruppia maritima' in Algae-Free Culture. 1984
O'Shaughnessy Reservoir, Delaware County, Ohio. 1975
O. C. Fisher (San Angelo) Reservoir, Tom Green County, Texas. 1977
Occidental Chemical Company Swift Creek Chemical Complex, Hamilton County, Florida. 1978
Occupational exposure to inorganic arsenic. 1974
Occupational exposure to inorganic arsenic; criteria for recommended standard. 1975
Occupational exposures to mists and vapours from strong inorganic acids, and other industrial chemicals. 1992
Occurrence assessment for disinfectants and disinfection byproducts : phase 6A / 1992
Ocean Disposal of Barge-Delivered Liquid and Solid Wastes from U.S. Coastal Cities. 1971
Oceanographic Observations in the Georgia Bight: Data Report for R. V. EASTWARD Cruises E-13-73 (4-11 September) and E-19-73 (8-9 December 1973). 1975
Oconomowoc Lake, Waukesha County, Wisconsin. 1975
Okauchee Lake, Waukesha County, Wisconsin. 1975
Old Ben Mine Reservoir, Franklin County, Illinois. 1975
Olin Lake, LaGrange County, Indiana. 1976
Oliver Lake, LaGrange County, Indiana. 1976
On the Influence of Low-Concentration Nitrogen Dioxide on Living Organisms. 1970
On-Line Colorimetric Analyzers for Monitoring Nitrate-Nitrite, Ammonia, Orthophosphorus and Total Hydrolyzable Phosphorus in Wastewater-Treatment Process Streams. 1974
One Mgd Ion Exchange Plant for Removal of Nitrate from Well Water. 1984
Optimization and evaluation of a microelectrolytic conductivity detector for the gas chromatographic determination of pesticide residues / 1976
Oradell Reservoir, Bergen County, New Jersey. 1976
Ordination of Aquatic Nematode Communities as Affected by Stream Water Quality. 1979
Organic trace analysis / 1984
Organotin Toxicity Studies Conducted with Selected Marine Organisms at EPA's Environmental Research Laboratory, Gulf Breeze, Florida. 1986
Origin and Chemical Composition of Androscoggin River Foam. 1981
Otter Lake, Cayuga County, New York. 1974
Overland recycling system for animal waste treatment / 1979
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