Learn the Issues
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EPA's Federal Employee Relocation Center
The EPA Federal Employee Relocation Center is a highly cost-competitive, efficient, customer service driven Relocation Resource Center capable of managing “one-stop-shop” domestic and international relocations for civilian government agencies.
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Superfund: Contaminated Sediments
Learn about contaminated sediments at Superfund sites, which may include clay, silt, sand, gravel, decaying organic matter, or shells that have been contaminated by spills, runoff, and other pollution sources.
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History of RadNet
RadNet and its predecessors have been collecting environmental data for more than fifty years.
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Brownfields in EPA Region 7
EPA Region 7 manages Brownfields and Land Revitalization programs in Iowa, Kansas, Missouri and Nebraska.
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Deletion of 2-Butoxyethyl Benzoate (2-BEB) from the Glycol Ethers Category of the Clean Air Act List of Hazardous Air Pollutants
Deletion of 2-Butoxyethyl Benzoate (2-BEB) from the Glycol Ethers Category of the Clean Air Act List of Hazardous Air Pollutants
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Basic Information about Air Quality SIPs
This page provides basic information on a State Implementation Plan.
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EPA Proposes Updated Groundwater Cleanup Plan for Radiation Technology Inc. Superfund Site
U.S. Environmental Protection Agency (EPA) is proposing an updated cleanup plan for groundwater contamination at the Radiation Technology Inc. Superfund site in Rockaway Township, New Jersey.
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Moss Landing Air: What were the results of EPA's air monitoring from January 17 to 20?
Return to: Frequently Asked Questions Particulate matter (PM2.5 and PM10) EPA’s monitoring showed concentrations of particulate matter to be consistent with the air quality index throughout the Monterey Bay and San Francisco Bay regions, with no measurements exceeding the moderate air quality level. Hydrogen fluoride gas Hydrogen fluoride gas was…
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Moss Landing Air: What did you test for during the fire?
Return to: Frequently Asked Questions We looked for contaminants likely found in a battery fire. The two main contaminants were: hydrogen fluoride and particulate matter.
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Moss Landing Air: What air monitoring technology did you use?
Return to: Frequently Asked Questions To monitor particulate matter, we used TSI DustTrak Monitors. We used the Honeywell SPM Flex (with the mineral acid chemistry cassette) to monitor for hydrogen fluoride.
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Moss Landing Air: What particulate sizes did EPA monitor during the initial response in January?
Return to: Frequently Asked Questions EPA monitored for all of the particulate sizes listed below. If we say we are monitoring for PM2.5, this includes monitoring for particles 2.5 micrometers (μm) and smaller, down to the detection limit of the instrument (in this case 0.1 micrometers). The equipment EPA used…
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Moss Landing Air: Can you detect nanoparticles in the air with the instrumentation you used during the initial response?
Return to: Frequently Asked Questions The term “nanoparticle” is often used to describe small particulate matter. The TSI DustTrak instruments used for air monitoring detect particles sized 0.1 microns (0.1 microns is the same as 100 nanometers) and larger. For reference, human hair is approximately 50-70 microns in thickness. (See…
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Moss Landing Air: What happened with the spike in particulate matter at air monitoring station 9 the morning of January 18, which resulted in a 1.275 mg/m3 reading for PM10?
Return to: Frequently Asked Questions EPA contractors were servicing the equipment at station 9, which resulted in a false reading of a temporary spike in PM10 at that location. Some temporary spikes or gaps in the data are expected, due to various factors such as lapses in telemetry (data transmission)…
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Coral Reefs
Coral reefs are among the most biologically diverse and valuable ecosystems on Earth. This web site describes the importance of coral reefs, threats to them, and ongoing efforts to protect them.
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Other Testing or Sampling at Moss Landing: Is EPA testing for dioxins?
Return to: Frequently Asked Questions Dioxins are produced in many ways, such as through power plant operations, agricultural operations, etc. Without a long-term study and risk assessment, it is difficult to determine if dioxins in the surrounding environment are a result of the January 2025 battery fire at Moss Landing…
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Other Testing or Sampling at Moss Landing: Did EPA sample for black carbon?
Return to: Frequently Asked Questions Black carbon (soot) is part of PM 2.5 (particulate matter smaller than 2.5 microns), which is measured in air monitoring. Since the fire, we have not seen levels of PM2.5 that would be of concern to the community’s health.
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Other Testing or Sampling at Moss Landing: Has the ash been sampled in the damaged building?
Return to: Frequently Asked Questions The damaged portion of Moss Landing 300 is unsafe to enter due to structural instability. We expect material in the building’s ash to include soot, debris, and burned battery material, as well as building materials. Ash, debris, and any other remaining material will be sampled…
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Other Testing or Sampling at Moss Landing: Did EPA take wipe samples on-site?
Return to: Frequently Asked Questions In emergency response situations, EPA focuses on understanding how a person could contact contamination (also called exposure). Inhalation was the main way someone could be exposed to contamination from Moss Landing. To understand the risk of inhalation, monitoring and measuring the air was done. It…
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EPA's Role at Moss Landing: What is battery delinking and what does it do?
Return to: Frequently Asked Questions Battery “delinking” is when cables connecting different batteries are disconnected. At Moss Landing, batteries were disconnected from one another. They were also disconnected from the rack holding the batteries in the energy storage system. Disconnecting the batteries from one another lowers the risk of fire.
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EPA's Role at Moss Landing: Why are you only overseeing battery removal on-site?
Return to: Frequently Asked Questions The State of California requested EPA support for oversight of the battery removal under our CERCLA legal authority. We are also bound by our legal authority . We have been asked by the state to: oversee the battery removal; oversee the assessment, preparation, and packaging…