Science & Technology
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Valley Fill Design and Construction Alternatives to Improve Ecological Performance
This presentation discusses; current challenges, comprehensive approaches, BMPs, the Middlefork Development, the Guy Cove project, and a path forward when looking at construction alternatives to improve the ecological performance of valley fills.
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Restoration of Riparian Zones on Surface Mines
Principles for establishing riparian areas. Riparian areas are three‐dimensional ecotones of interaction that include terrestrial and aquatic ecosystems, that extend down into the groundwater, up above the canopy, outward across the floodplain.
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Case Study-Removal and Restoration of In-stream Sediment Ponds
Presentation from 2011 on goals and objectives of Case study was to restore impacted streams to a proper dimension, pattern, and profile with an emphasis on restoration of stream and riparian habitats.
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Previously Issued EPA Nutrient Reduction Policies and Supporting Documents
Previously Issued EPA Nutrient Reduction Policies and Supporting Documents
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Nutrient Data
Nutrient Data
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NWCA Condition Help Doc Auto Direct
Autodirect
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NWCA Risk Help Doc Auto Direct
Autodirect
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NWCA Matrix Help Doc Auto Direct
Autodirect
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EcoRisk Portal
The EcoRisk Portal provides access to EPA’s ecological risk assessment authorities, regulations, policy, guidance, training, and technical resources.
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Surface and Source Water Tools
Surface and Source Water Tools
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Water Quality Standards Tools for Tribes
This website provides tools to assist tribes with the adoption of new or revised water quality standards developed under the Clean Water Act.
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Inter-Agency Engagement on Nutrient Reduction
Information related to Inter-Agency Engagement on Nutrient Reduction.
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Water Quality Trading Memorandums
Information related to Water Quality Trading Memorandums.
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EPA’s Water Quality Trading Policy: Promoting Market-Based Mechanisms for Improving Water Quality
Final presentation slides from EPA’s March 5, 2019 webinar on the memo: Updating EPA’s Water Quality Trading Policy to Promote Market-Based Mechanisms for Improving Water Quality. This memo seeks to modernize the agency’s water quality trading policies
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TRI Relative Risk-Based Environmental Indicators: Interim Toxicity Weighting Summary Document, June 1997
This document provides the methodology and preliminary results for the chronic exposure human health toxicity weights used in the Indicators project
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Methodology Document for RSEI Model Version 2.1.5, October 2007
This methodology document accompanies version 2.1.5 of the Risk-Screening Environmental Indicators model.
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Risk-Screening Environmental Indicators (RSEI) Methodology
Risk-Screening Environmental Indicators (RSEI) Methodology
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Developing the Risk-Screening Environmental Indicators
Describes options considered during the development of the Risk-Screening Environmental Indicators screening model
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Methodology Document for RSEI Model Version 2.1, January 2004
This methodology document accompanies version 2.1 of the Risk-Screening Environmental Indicators model.
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Methodology Document for RSEI Model Version 2.1.2, August 2004
This methodology document accompanies version 2.1.2 of the Risk-Screening Environmental Indicators model.