Science & Technology
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Adequacy Review of State Implementation Plan (SIP) Submissions for Conformity
This page is for state and local air quality regulators and transportation planners that offers guidance on how to reduce air pollution from cars, diesel trucks, city and school buses, construction equipme
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Region 9: Letter from CARB to EPA for the San Joaquin Valley (Valley) 2018 Plan supersedes past submittal
California Air Resources Board letter submittal to EPA the San Joaquin Valley 2018 Plan for the 1997, 2006, and 2012 PM2.5 Standards and the 2016 Moderate Area Plan for the 2012 PM2.5 Standard as revisions to the California State Implementation Plan (SIP).
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EPA’s Travel Efficiency Assessment Method (TEAM): Development and Case Studies
This presentation describes EPA's recent case studies examining potential travel efficiency strategies, TEAM analytical processes and their potential emisssion reductions.
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Region 9: Nevada Inadequate Letter (2/17/2000)
This January 12, 2000, letter from EPA transmits the inadequacy finding for transportation conformity purposes the motor vehicle emission budgets in the "Carbon Monoxide Air Quality Implementation Plan for the Clark County Nonattainment Area.
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Region 9: California Los Angeles (Coachella) Inadequate Letter (1/4/2000)
This November 23, 1999, letter from EPA determines that the Coachella Valley Serious PM10 plan submittal is currently inadequate for conformity purposes.
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Region 9: California South Coast Adequate Letter (4/18/2003)
This is a letter from Jack Broadbent, Director, to Catherine Witherspoon regarding the motor vehicle emissions budgets in the particulate matter (PM-10) progress and attainment plan and motor vehicle emissions budgets for the South Coast.
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Region 9: Arizona Adequate Letter (11/1/2001)
This is a letter from Jack P. Broadbent, Director, Air Division to Nancy Wrona and James Bourney informing them of the adequacy of Revised MAG 1999 Serious Area Carbon Monoxide Plan and that the MAG CO Plan is adequate for Maricopa County.
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Permeate Refining Determination Letter
Determination letter in response to Permate Refining petition for an advanced biofuel pathway for production of ethanol.
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Duonix Beatrice Determination Letter
Determination letter in response to the petition from Duonix Beatrice, LP regarding their production process for biodiesel from non-food grade corn oil under the Renewable Fuels Standard (RFS) program.
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Absolute Energy, LLC Determination Letter
This determination letter responds to the fuel pathway petition from Absolute, Energy, LLC to use the purchase of renewable energy certificates (RECs) to reduce the greenhouse gas emissions factor associated with electricity used at their facility.
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White Energy Hereford, LLC Determination Letter
This determination letter responds to the fuel pathway petition from White Energy Hereford, LLC to use the purchase of renewable energy certificates (RECs) to reduce the greenhouse gas emissions factor associated with electricity used at their facility.
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EPA and CARB Approve Emissions Fixes for Audi, Porsche, and VW Diesel 3.0 Liter Sport Utility Vehicles
EPA and CARB to Volkswagen approves emissions modifications for generations 2.1 SUV and 2.2 SUV of the 3.0 liter subject vehicles. (October 20, 2017)
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Washington County Lead District National Priority List (NPL) Superfund Sites: Furnace Creek, Old Mines, Potosi and Richwoods; Washington County, Missouri – Fact Sheet, June 2022
Site Update: Lead Testing and Cleanup Opportunity
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Water Quality Standards Regulations: Wisconsin
Information related to Water Quality Standards for Wisconsin.
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Meet EPA Scientist Jordan West, Ph.D.
Jordan West, Ph.D. is an aquatic ecologist at EPA. Her areas of expertise include freshwater & marine ecology, climate change impacts and adaptation, resilience and threshold theory, environmental risk assessment, expert elicitation & stakeholder processes
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Meet EPA Geologist Stephanie Ross
Stephanie Ross is the Region 5 Superfund and Technology Liaison (STL) for EPA’s Office of Research and Development. After seven years as a consulting hydrogeologist, Stephanie joined EPA15 years ago, interning at Region 5, Region 8, and EPA Headquarters, a
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Meet Environmental Engineer Sarah Watson
Sarah Watson is the Region 9 Superfund and Technology Liaison (STL) for EPA’s Office of Research and Development. Previously, Sarah worked as a Remedial Project Manager (RPM) in Region 9 on mining sites and federal facilities, including Carson River Mercur
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Meet EPA Physical Scientist Stephen Dyment
Stephen Dyment is a physical scientist working as a Superfund and Technology Liaison stationed in EPA Region 8 which includes the states of Colorado, Utah, Wyoming, Montana, North Dakota, and South Dakota, and 28 Tribal Nations.
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Meet EPA Researcher Kim Prestbo
Kim Presto is the Region 10 Superfund and Technology Liaison (STL) for EPA’s Office of Research and Development. Kim joined EPA Region 10 in 2011 as a Remedial Project Manager (RPM) working primarily on the Bunker Hill Superfund Site and federal facilities
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Water Quality Standards Regulations: Minnesota
Information related to Water Quality Standards for Minnesota.