Learn the Issues
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Procedure 7 - Quality Assurance Requirements for Gaseous Ethylene Oxide (ETO) Continuous Emission Monitoring Systems Used for Compliance Determination
Promulgated quality assurance procedure 6 - Quality Assurance Requirements for Gaseous Hydrogen Chloride (HCl) Continuous Emission Monitoring Systems Used for Compliance Determination at Stationary Sources
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Performance Specification 19 - Performance Specifications and Test Procedures for Ethylene Oxide (ETO) Continuous Emission Monitoring Systems
Performance Specification 3 - Specifications and Test Procedures For O2 And CO2 Continuous Emission Monitoring Systems In Stationary Sources
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Method 327 Fugitive and Area Source Measurement of Selected Volatile Organic Hazardous Air Pollutants Using Specially Prepared Canisters
Determination of Isocyanates in Stationary Source Emissions
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Corrective Action at Johnston Atoll
In response to the updated permit application EPA made a proposed draft permit decision to issue a RCRA permit to the United States Air Force for Corrective Action of Solid Waste Management Units and Areas of Concern at Johnston Atoll on October 29, 2018.
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Annual Compliance Reports for Drinking Water Systems in EPA Region 8
Annual compliance reports for violations of the National Primary Drinking Water Regulations (NPDWR) in Wyoming and EPA Region 8 Tribal Lands.
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National Rivers & Streams Assessment 2013/14 Field Operations Manual Wadeable
The Field Operations Manual for the NRSA 2013/14 Wadeable
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National Rivers & Streams Assessment 2013/14 Field Operations Manual Non-Wadeable
The Field Operations Manual for the NRSA 2013/14 Non-Wadeable
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National Coastal Condition Assessment 2010 Great Lakes Technical Memorandum
PDF of the NCCA 2010 Great Lakes Technical Memorandum
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National Lakes Assessment Design Documents
Design documents for the National Lakes Assessment
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Regional Highlight - Mercury in Fish Tissue in the Pacific Northwest
NLA 2012 Highlight - Mercury in fish tissue in three Pacific Northwestern states
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The Standardized Monitoring Framework: A Quick Reference Guide
A quick reference guide to understanding the Standardized Monitoring Framework.
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EPA Updates Maps to Protect Endangered Species and Provide Flexibility to Farmers
OPP update: EPA Updates Maps to Protect Endangered Species and Provide Flexibility to Farmers
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EPA Announces Proposed Registration of Pesticide Trifludimoxazin
Announcing Proposed Registration of Pesticide Trifludimoxazin
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EPA Announces Proposed Registration of Pesticide Diflufenican
Announcing release for public comment of EPA's proposed registration decision for two products containing the new active ingredient diflufenican.
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EPA Proposes to Register New Pesticide for Varroa Mite Control
EPA is announcing it has proposed to register one technical and two end use products containing Vadescana for control against Varroa mites to provide beekeepers with tools to combat this pest.
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Role of Plants in Water Filtration
Exercise for children grade level 4-7 to help them understand the role of plants in filtering the water moving through a watershed.
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Region 4 FOIA Repository
Frequently requested FOIA related documentation from region 4.
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RadTown Radiation Exposure Activity 4: Exposure Pathways
Radioactive material, or radionuclides, travel in different ways. This activity asks students to create webs or chains that describe the ways in which we may interact with radiation through the world around us.
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RadTown Radiation Exposure: Vocabulary Activities
Learn more about radon with your students! This page provides background information for teachers and parents. Each RadTown activity for the classroom is Common Core State Standard (CCSS) and Next Generation Science Standard (NGSS) aligned.
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RadTown Classroom Materials: The Radioactive Atom
The RadTown Radioactive Atom activities are designed to help students identify the structure of an atom and describe the structural changes that occur in unstable (radioactive) atoms as they decay.