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Science & Technology

Assessment of PM2.5 FEMs Compared to Collocated FRMs

This memorandum describes a one-page technical report that assesses the comparability of a PM2.5 continuous monitor when collocated with an FRM sampler.
2016 Revisions to the Exceptional Events Rule: Update to Frequently Asked Questions

This September 11, 2018, document replaces the “Interim Exceptional Events Rule Frequently Asked Questions” document posted on May 14, 2013.
Exceptional Events Submissions Table (2016 Rule)

This table contains examples of air agency submitted exceptional events demonstrations and responsive EPA decision documents that have been prepared and/or acted upon under the 2016 Exceptional Events Rule
Exceptional Events Documents Ozone - Rhode Island

Exceptional Events Documents Ozone - Rhode Island
Exceptional Events Documents Ozone - Massachusetts

Exceptional Events Documents Ozone - Massachusetts
Exceptional Events NPRM webinar presentation slides

Presentation slides from the Exceptional Events NPRM webinar on November 17, 2015.
Webinar Presentation - Final Exceptional Events Rule Revisions and Final Wildfire/Ozone Implementation Guidance

Slides for 9/21/2016 webinar titled Final Exceptional Events Rule Revisions and Final Wildfire/Ozone Implementation Guidance
Ambient Air Toxics Trends Tool

This application is an expansion of the Air Trends Report displaying the annual ambient air toxics monitoring trends.
Clean Diesel Technologies, Inc. – Purifilter Plus M DPF

This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
Nett Technologies, Inc.—MD300 Diesel Oxidation Catalyst (DOC)

This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
Clean Diesel Technologies, Inc. – AZC Purimuffler or AZC Purifier Diesel Oxidation Catalyst (DOC) plus CDTi Closed Crankcase Ventilation (CCV) System

This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
DonaldsonTechnology—Series 6000 Diesel Oxidation Catalyst (DOC) & Spiracle Closed Crankcase Filtration system

This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
MJ EcoPower Hybrid Systems, Inc.—EcoCrane Hybrid System

This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
Various Technology—Cetane Enhancers

This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
Clean Diesel Technologies, Inc. – Purifilter - Diesel Particulate Filter (DPF)

This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
Donaldson Technology—Series 6100 Diesel Oxidation Catalyst (DOC)

This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
SmartWay High Performer Lists

This page contains a list of the all of the types of high performing SmartWay partners that are recognized by EPA.
Shared Mobility

This page is general overview of shared mobility, with explanations of carsharing, micromobility, ridehailing, and microtransit.
Revised Final Determination and Settlement Agreement in Genscape, Inc. v. EPA 19-3705 (6th Cir.)

9 questions about Quality Assurance Program on revoking Genscape RINs are answered.
Certification for Electric Motorcycles

Steps for certifying an electric nonroad motorcycle with EPA.

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