Science & Technology
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MODFLOW Instructional Manual
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How Translational Approaches Help Make EPA Research More Impactful
Translational research allows EPA researchers to bring their deep scientific expertise into conversations with state and local governments’ knowledge of how implementation looks in practice.
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TMDLs Where Mercury Loadings are Predominantly from Air Deposition
A presentation documenting Total Maximum Daily Load (TMDL) approaches for cases in which mercury loadings are predominantly from air deposition into waters.
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Watershed and Water Quality Modeling Technical Support Center Factsheet
The factsheet provides an overview of the Watershed and Water Quality Modeling Technical Support Center.
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Using Microbial Source Tracking to Support TMDL Development and Implementation
A guide for TMDL practitioners on microbial source tracking, detailing how it can be used to support TMDL development and implementation.
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Listing Waters Impaired by Atmospheric Mercury: Voluntary Subcategory 5m for States with Comprehensive Mercury Reduction Programs
The document presents information regarding a voluntary approach for listing waters impaired by mercury predominantly from atmospheric sources pursuant to Clean Water Act Section 303(d), also known as “subcategory 5m.”
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Options for Expressing Daily Loads in TMDLs
The draft document provides technical options for developing daily load expressions in TMDLs calculated using time frames greater than daily allocations.
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TMDL Modeling ToolBox Factsheet
The factsheet provides an overview of the TMDL Modeling Toolbox.
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Watershed Academy Webcast: Improve Water Quality by Using Cover Crops and Other Conservation Systems
This page contains a description and documentation associated with the webcast on improving water quality through the use of cover crops and other agricultural conservation systems.
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Watershed Academy Webcast: USDA's National Water Quality Initiative
This page contains a description and documentation associated with the webcast on how USDA’s NWQI is working in priority watersheds to help farmers, ranchers and forest landowners improve water quality.
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TSCA Work Plan Chemical Problem Formulation and Initial Assessment 1,4-Dioxane
1,4-Dioxane Problem Formulation and Initial Assessment
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Methylene Chloride Scope Document and Supplemental Files
scope document and supplemental files for methylene chloride
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Trichloroethylene (TCE) Scope Document and Supplemental Files
Scope document and supplemental files for Trichloroethylene (TCE)
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Asbestos Scope Document and Supplemental Files
Scope document and supplemental files for asbestos
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1-Bromopropane (1-BP) Scope Document and Supplemental Files
scope document and supplemental files for 1-BP
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N-Methylpyrrolidone (NMP) Scope Document and Supplemental Files
scope document and supplemental files for NMP
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1,4-Dioxane Scope Document and Supplemental Files
Scope Document and supplemental files for 1,4-dioxane
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Office of Research and Development Strategic Plan
Webpage outlining ORD's Strategic Plan
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ORD Strategic Goals and Objectives
Goals and Objectives of the ORD Strategic Plan
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Overview of the Endocrine System
Endocrine systems, also referred to as hormone systems, are found in all mammals, birds, fish, and many other types of living organisms.