Search Results for the EPA National Library Catalog

Items Found: 2350
Showing: Items 1901 - 1950
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Select Item Title Year Published
Robust Estimates of the ED50. 1979
Rock Lake, Jefferson County, Wisconsin. 1974
Rocky Fork Reservoir, Highland County, Ohio. 1975
Role of Pharmacokinetic Modeling in Risk Assessment: Perchloroethylene (PCE) as an Example. 1986
Role of Short-Term Tests in Evaluating Health Effects Associated with Drinking Water. 1990
Role of Time as a Factor in the Toxicity of Chemical Compounds in Intermittent and Continuous Exposures. Part I. Effects of Continuous Exposure. 1977
Rome Pond, Jefferson County, Wisconsin. 1974
Ross Barnett Reservoir, Jackson, Madison, and Rankin Counties, Mississippi. 1975
Rotifer sensitivity to combinations of inorganic water pollutants 1977
Round Lake, Saratoga County, New York. 1974
Round Lake, Waupaca County, Wisconsin. 1975
Route of Absorption of DDVP after Oral Administration to Rats. 1965
Roy Lake, Marshall County, South Dakota. 1977
Rye Patch Reservoir, Pershing County, Nevada. 1977
S9-Dependent Activation of 1-Nitropyrene and 3-Nitrofluoranthene in Bacterial Mutagenicity Assays. 1985
Sacandaga Reservoir, Fulton and Saratoga Counties, New York. 1974
Salmonella Assay Software (Version 2.2) and User's Manual. Standardized Procedure for Analysis and Interpretation of Mutagenicity Data. 1987
Salmonella Data Management Software (for Microcomputers). 1987
Sample Collection and Preparation Methods Affecting Mutagenicity and Cytotoxicity of Coal Fly Ash. 1983
Sampling and analysis design for development of Elliott Bay toxics action plan / 1985
Sampling and analysis design for development of Everett Harbor action program / 1986
Sampling and analysis of coke-oven door emissions / 1977
Sampling and analysis of selected toxic substances : task II: analysis for semivolatile brominated organics in fish and turtles. 1980
Sampling Guidance Manual for the National Dioxin Study. 1984
Sand Lake, Brown County, South Dakota. 1976
Sangchris Lake, Christian County, Illinois. 1975
Santa Margarita Lake, San Luis Obispo County, California. 1978
Santeetlah Lake, Graham County, North Carolina. 1975
Saratoga Lake, Saratoga County, New York. 1974
Sardis Lake, Lafayette and Panola Counties, Mississippi. 1975
Saturation of Lindane Metabolism in Chronically Treated (YS x VY) F1 Hybrid Mice. 1987
Saturator System for Generating Toxic Water Solutions for Aquatic Bioassays. 1982
Schroon Lake, Essex and Warren Counties, New York. 1974
Scientific basis for the development of the international toxicity equivalency factor (I-TEF) method of risk assessment for complex mixtures of dioxins and related compounds / 1988
Scientific rationale for the selection of toxicity testing methods : human health assessment / 1980
Screening Complex Hazardous Wastes for Mutagenic Activity Using a Modified Version of the TLC/Salmonella Assay. 1986
Screening Protocol for Assessing Toxicity of Organic Chemicals to Anaerobic Processes. 1989
Seasonal Chronic Toxicity of Chlorination to the American Oyster, 'Crassostrea virginica' (G). 1978
Seasonal Variation of Potential Nutrient Limitation to Chlorophyll Production in Southern Lake Huron. 1981
Sebasticook Lake, Penobscot County, Maine. 1974
Section 74 seafood processing study : executive summary. Appendix, volume II : a report to the congress of the United States / 1980
Sediment quality values refinement evaluation of PSDDA sediment quality values / 1988
Sediment Quality Values Refinement. Volume 1. 1988 Update and Evaluation of Puget Sound AET (Apparent Effects Threshold). 1988
Sediment quality values refinement: volume I - data appendices : 1988 update and evaluation of Puget Sound AET 1988
Sediment Toxicity, Contamination, and Macrobenthic Communities Near a Large Sewage Outfall. 1985
Selected tools and techniques for physical and biological monitoring of aquatic dredged material disposal sites 1990
Selected toxicological studies of dimilin in weanling male rats / 1980
Self-monitoring procedures : basic parameters for municipal effluents : [student reference manual]. 1974
Semi-annual report, January-June, 1974 / 1974
Semi-annual report, July-December 1974 / 1974
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