Science & Technology
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EPA Response to RFC 23002 - Toxic Substances Control Act (TSCA) Risk Evaluation for 1,4-Dioxane
This page contains the Agency's response to RFC 23002 - Toxic Substances Control Act (TSCA) Risk Evaluation for 1,4-Dioxane
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EPA response to information quality alert - issued Dec. 16, 2019
RFC 19004 EPA response to information quality alert concerning atrazine
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Performance-Based Measurement System (PBMS) & Flexible Approach
Performance-Based Measurement System (PBMS) & Flexible Approach, Frequent Questions
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How do the different parts of particulate matter (PM) fit together?
The various parts of PM in the National Emissions Inventory (NEI) are related as follows. PM10-FIL > PM25-FIL because PM10-FIL includes PM25-FIL PM25-PRI = PM25-FIL + PM-CON This equation only applies at the process level. Because some sources only can report PM2.5 (due to test method differences), this equation does…
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About EPA Digitization Centers
Purpose of the EPA Digitization Centers
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Regulatory Exclusions and Alternative Standards for the Recycling of Materials, Solid Wastes and Hazardous Wastes
Determining the Level of Regulation for Hazardous Waste Recycling, Recycled Materials that are not Subject to RCRA Hazardous Waste Regulation, Materials Subject to Alternative Regulatory Controls, Materials Subject to Full Hazardous Waste Regulations.
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RFR 16001A - Letter dated 5/26/17; received 5/26/17
RFR 16001A - Letter dated 5/26/17; received 5/26/17
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Volunteer Monitor's Guide to Quality Assurance Project Plans
This document is designed to encourage and facilitate the development of volunteer Quality Assurance Project Plans by clearly presenting explanations and examples.
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RFR 21001A - Request for Reconsideration; Dated 3/3/2021; Received 3/4/2021
RFR 21001A - Request for Reconsideration, Dated 3/3/2021, Received 3/4/2021
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EPA Response to RFC 15004; issued June 2, 2016
Response to RFC 15004
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CMAQ User Community
Several different governmental, state, academic, and private institutions use CMAQ for many different applications.
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Leech Lake Band of Ojibwe Application for Treatment Similar as a State for Water Quality Standards
Announcement that the Leech Lake Band of Ojibwe of Minnesota is now authorized to establish water quality standards for surface waters on the Leech Lake Reservation.
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Procedures for Equipment Inventory and Management in the Laboratory Services and Applied Science Division
Field Branches Quality System and Technical Procedures
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Technical Guidance for Determining the Presence of Manufactured PCB Products in Buildings and Other Structures
EPA developed this document to provide a technical guidance to assist property owners or operators, their contractors, and analytical labs in determining the presence of manufactured PCB products in buildings or other structures.
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Fact Sheet: Flexible Provisions for Emergency Situations
This fact sheet describes changes to the federal polychlorinated biphenyl (PCB) regulations at 40 Code of Regulations (CFR) part 761 that went into effect on February 26, 2024, which address the cleanup and disposal of PCBs during emergency situations.
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Risk Evaluation for 1-Bromopropane (1-BP)
1-Bromopropane (1-BP)