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United States Environmental Protection Agency
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Search Results for the EPA National Library Catalog
Items Found: 147
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Your Search: (SUBJECT=Periodic variations)
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A climatology of temperature and precipitation variability in the United States /
Acid precipitation patterns and trends in eastern North America, 1980-1984 /
Air Pollution: Appendix E - Air Pollution Case Study of the South Holland Region (First Phase) - 1973, No. 6.
Air quality data : 1974 first quarter statistics /
Ammonia investigations in the Colorado River, Grand Junction and Fruita, Colorado /
Analysis of hot/cold cycle requirements for heavy-duty vehicles /
Analysis of Polychlorinated Biphenyl (PCB) Loading Trends in Lake Michigan.
Annual and seasonal precipitation probabilities /
Annual Nutrient Cycles in a Marine Microcosm.
Atmospheric inputs of phosphorus to southern Lake Huron, April-October 1975 /
Category selection for transient heavy-duty chassis and engine cycles /
Characteristics of Particulate Patterns, 1957-1966.
Characterization of Spatial and Temporal Trends in Water Quality in Puget Sound.
Characterizing and controlling urban runoff through street and sewerage cleaning /
Climatic Effects of 1950-2050 Changes in US Anthropogenic Aerosols.
Comparison of Mid-Bay and lateral station water quality data in the Chesapeake Bay Mainstem : Chespaeake Bay Program.
Computer Simulation of Eutrophication.
Conceptual Designs and Cost Estimates for E-SOx Retrofits to Coal-Fired Utility Power Plants.
Cost effectiveness analysis of effluent guidelines and standards for the aluminum forming industry.
Dependencies and Sensitivity of Tropospheric Oxidants to Precursor Concentrations over the Northeast United States: A Model Study.
Determining Wastewater Treatment Costs for Your Community.
Digital Topographic Approach to Modeling: The Distribution of Precipitation in Mountainous Terrain.
Distribution and abundance of submerged aquatic vegetation in the lower Chesapeake Bay, Virginia /
Distribution and abundance of waterfowl and submerged aquatic vegetation in Chesapeake Bay
Distribution of Submersed Vascular Plants, Chesapeake Bay, Maryland.
Dynamic Simulation of Vertical Infiltration into Unsaturated Soils.
Economic evaluation of the promulgated interim primary drinking water regulations
Economic evaluation of the proposed interim primary drinking water regulations.
Effects of Gridded Precipitation Bias on Wet Deposition Predictions.
Effects of Simulated Acidic Rain Applied Alone and in Combination with Ambient Rain on Growth and Yield of Field-Grown Snap Bean.
Efficacy of Ozone Exposure Indices in the Standard Setting Process.
Environmental Improvements in Lake Erie during the Past Decade.
Environmental investments : the cost of a clean environment : report of the Administrator of the Environmental Protection Agency to the Congress of the United States /
Environmental Measurements: Valid Data and Logical Interpretation; Symposium.
Environmental monitoring and assessment program : ecological indicators /
Environmental Survey of the Lower Clearwater River.
Estimating Cloud Parameters for NEROS I.
Estimation of seasonal and annual acidic deposition through aggregation of three-day episodic periods /
Evaluating indirect sources /
Evaluation of a System for the Imposition of Plant Water Stress.
Evaluation of Alternative Service Improvements.
Evaluation of Shavers Fork Mine Seals.
Evaluation of the Multiple Source Gaussian Plume Diffusion Model - Phase II.
Fish kills caused by pollution : fifteen year summary, 1961-1975 /
Fish kills caused by pollution in 1975 Sixteenth annual report (Report for 1 Jan 75 to 31 Dec 75) [MICROFICHE].
Great Lakes Hydrology by Months, 1946-1965.
Health Advisory for Hexahydro-1,3,5-Trinitro-1,3,5-Triazine (RDX).
Health Advisory for Octahydro-1,3,5,7-Tetranitro 1,3,5,7-Tetrazocine (HMX).
HF radar measurements of circulation in the eastern Strait of Juan de Fuca near Protection Island (July, 1979) /
Hourly Values of Equatorial Dst, 1957 - 1970.
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