Science & Technology
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Air Toxics Screening Assessment
The Air Toxics Screening Assessment, or AirToxScreen, is EPA's review of air toxics in the United States, based on modeled air quality. We developed AirToxScreen as a tool for state, local and tribal agencies, and we use its results as well.
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What Is CHP?
Understand what CHP is, including common CHP configurations and CHP applications.
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State Monitoring Agency Annual Air Monitoring Plans and Network Assessments
This page contains links the State Annual Monitoring Plans.
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U.S. State-level Non-CO2 GHG Mitigation Report
U.S. State-level Non-CO2 GHG Mitigation Report
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Global Non-CO2 GHG Emissions: 1990-2030
EPA August 2011 report on global non-CO2 emissions projections (1990-2030) for emissions of non-CO2 greenhouse gases (methane, nitrous oxide, and fluorinated greenhouse gases) from more than twenty emissions sources.
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Chemical Speciation Network - Sample Filter Handling, Shipment, and Gravimetric Analysis Summary Reports
Interlaboratory Performance Evaluation Comparison Results for CSN network
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NO2 Monitoring - Susceptible and Vulnerable Populations
Information on the Susceptible and Vulnerable Populations NO2 Monitoring.
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2003 Community Scale Air Toxics Ambient Monitoring (CSATAM) Awarded Project Plans
Copies of the 2015 project plans awarded as part of the 2017 CSATAM grants.
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2025 Air Sensors Workshop
Landing page for the 2025 Air Sensors Workshop
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Text Version of the Gasoline Label
Text version of the new gasoline vehicle fuel economy label displays and details.
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Participate in SmartWay
This page contains information about becoming a SmartWay Partner/Affiliate and provides registered SmartWay Partners with key resources and tools.
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Compliance Reporting for Heavy-Duty Commercial Trucks and Buses and Onroad Heavy-Duty Engines
Steps for compliance reporting with EPA for onroad commercial trucks and buses.
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Semi-Active Electric Diesel Particulate Filter (SEF) System
This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
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True Cost of Car Ownership
This page is overview of costs associated with car ownership: car payment, fuel, parking, maintenance and repairs, taxes, registration, depreciation, along with time lost due to traffic or looking for parking. Includes graphic highlighting these costs.
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PCS Calculation E-mail Correspondence
Contains estimated calculation that there will be less than a 70% reduction in aggregate drainage basin reductions for PNA areas, PCS Phosphate Mine, Beaufort County, NC, May 18, 2009
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PCS Phosphate: USACE Response to EPA Elevation
Contains e-mail cover & Pamlico-Tar River Foundation response to USACE Response to EPA Elevation of PCS Phosphate Mine Expansion Permit, Beaufort County, North Carolina, May 12, 2009
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PCS Phosphate 404Q USACE Decision and Documents EPA E-mail Correspondence, May 7, 2009
Contains correspondence for meeting on USACE decision on Elevation Request for Section 404 Permit Decision, PCS Phosphate Division, Aurora Operation, Beaufort County, NC, May 7, 2009
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PCS Phosphate 404Q USACE Decision and Documents E-mail
Contains e-mail cover & USACE decision & analysis on Elevation Request for Section 404 Permit Decision, PCS Phosphate Division, Aurora Operation, Beaufort County, NC, May 7, 2009
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PCS Phosphate 404Q USACE Decision and Documents EPA E-mail Correspondence, May 6, 2009
Contains correspondence for meeting on USACE decision on Elevation Request for Section 404 Permit Decision, PCS Phosphate Division, Aurora Operation, Beaufort County, NC, May 6, 2009
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Question about Bonnerton Hardwood Flat E-mail Correspondence
Contains correspondence regarding questions on the ecological value on Bonnerton Hardwood Flat locations PCS Phosphate Division, Aurora Operation, Beaufort County, NC, April 21, 2009