Science & Technology
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Chemical Research to Inform Decision Making
Learn about the chemicals and materials we are researching to inform decision making, such as PFAS and other contaminants of emerging concern.
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Federal Agency Hazardous Waste Compliance Docket
List of the Federal Agency Hazardous Waste Compliance Docket Facilities comprised of four lists: National Priorities List (NPL), Non-National Priorities List, Base Realignment and Closure Act (BRAC), and Resource Conservation and Recovery Act (RCRA).
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DWSRF Resources for Water Utilities
This page contains links and summaries of DWSRF resources.
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National Study of Nutrient Removal - Fact Sheets
Fact sheets describing examples of low-cost adjustments to sewage treatment plants to reduce nutrient pollutant discharges
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AQS "Ask the Experts" August 2019
AQS "Ask the Experts" August 2019
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Decommissioning of Former Exide Battery Recycling Facility, Vernon, California
This webpage is no longer being actively updated. It details previous work done at the former Exide facility. For information about EPA’s work under Superfund, please visit: https://www.epa.gov/superfund/exide.
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EPA Pacific Southwest (Region 9) Regional Laboratory
Located in Corvallis and Newport, Oregon, and in Hayward, California, the Region 9 Laboratory is an integrated science center whose mission is to protect human health and the environment in EPA’s Pacific Southwest region (Region 9).
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EPA Pacific Southwest (Region 9) Laboratory Contacts
Laboratory contacts for EPA Region 9's Laboratory. The Region 9 Laboratory is a full service, state-of-the-art facility specializing in chemical analysis, biological analysis and field sampling services.
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How does the Fuel Wizard Determine which Fuel Formulations to Modify?
See More Frequent Questions about MOVES and Related Models. The Fuel Wizard only works on fuel formulations that are in your county database (CDB) and it "edits" them to comply with the alterations you provide. If you wish to create a set of alternate fuels, you will need to import…
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Is There a Way to Model Emissions of a Single Vehicle on a Given Route in MOVES?
See More Frequent Questions about MOVES and Related Models. MOVES is designed to model fleet emissions, but the project scale in MOVES allows you to model a single average vehicle on a link (road segment). The project scale requires the user to import detailed data, including vehicle population. By importing…
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What Pollutants are Included in “oxides of nitrogen” in MOVES?
See More Frequent Questions about MOVES and Related Models. The definition of NOx in MOVES (NO + NO2 + HONO) is different than the standard NOx definition of NOx (NO + NO2). This change has been made to correct the exhaust NOx emission in MOVES for potential interference with HONO…
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Does MOVES Incorporate Anticipated Improvements in VOC Emission Factors Resulting from Improved Fuel Economy?
See More Frequent Questions about MOVES and Related Models. Changes in fuel consumption affect VOC emissions by reducing refueling vapor losses and spillage. Other emissions (such as sulfates) are also affected by fuel consumption. MOVES incorporates changes due to fuel economy requirements that were finalized as of the date of…
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Can MOVES Report Output in Terms of Fuel Consumption?
See More Frequent Questions about MOVES and Related Models. Although gallons of fuel consumed are not reported by MOVES, the factors used to convert total energy consumption (a MOVES reporting option) to gallons of fuel are contained in the FuelSubtype table (energy content, reported in kilojoules per gram of fuel)…
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Why Doesn't my Output Vehicle Miles Traveled (VMT) Match my Input VMT?
See More Frequent Questions about MOVES and Related Models. This problem usually occurs when the run specification does not include all possible vehicle and fuel types. MOVES internally allocates the input VMT to each of the source types and fuel types and only reports the VMT for the fuel types…
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Why in my Nonroad Results do I Have a fuelTypeID not Listed in the FuelType Table?
See More Frequent Questions about MOVES and Related Models. The fuel types used by the nonroad part of MOVES is not located in the FuelType table. If you look in the NRFuelType table you will see that 23 is for nonroad diesel fuel and 24 is for marine diesel fuel.
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What is the Meaning of the MOVESScenarioID Field? What Conditions Must User-Defined MOVESScenarioIDs Meet?
See More Frequent Questions about MOVES and Related Models. The MOVESScenarioID is merely text that is used to label the output rows resulting from a MOVES rates run and is defined in the Scale Panel of the MOVES GUI. You can enter any text you like, as long as you…
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What Should I Do About this Warning: "Warning: A Work File Failed. Calculations will be Retried. No data has been lost."?
See More Frequent Questions about MOVES and Related Models. This is just a warning message not an error message so there is nothing to fix. This is a internal timing issue when the MOVES worker tries to access a file and there is a lock on it. This lock could…
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How Can I Reduce the Time Needed to Run the Nonroad Emission Factor Post-Processing Scripts?
See More Frequent Questions about MOVES and Related Models. Very long run times are not unusual for Nonroad emission factor post-processing scripts, particularly with a large output database. To reduce script run time, we recommend doing the following: Reduce the size of your output database by choosing just the amount…
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Where Can I Find Default HPMSBaseYearVMT Values for a Specific County?
See More Frequent Questions about MOVES and Related Models. MOVES does calculate default values for VMT for each calendar year for each county. Since these values are calculated, they are not found in any table in the default database. If you wish to obtain the default estimates, you will need…
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What is Vehicle Specific Power (VSP)?
See More Frequent Questions about MOVES and Related Models. It is an estimate of the power demand on the engine during driving. It is calculated using the second-by-second speed values in a driving schedule, along with information about the type of vehicle being operated. The VSP is used by MOVES…