Science & Technology

Exceptional Events Documents PM2.5 - Rose Park and West Valley, UT

How the W126 index value is calculated

This is a simple step-by-step guide to show how to calculate a W126 value.

Draft Analyses of PM Data for the PM NAAQS Review - Cover Memo

This is the three-page cover memo summarizing the analyses.

Analyses of 1999 PM Data for the PM NAAQS Review

These files document all analyses conducted in association with the EPA memorandum from Terence Fitz-Simons, Scott Mathias, and Mike Rizzo titled "Analyses of 1999 PM Data for the PM NAAQS Review," November 17, 2000.

Draft Analyses of PM Data for the PM NAAQS Review

These files document all analyses conducted in association with the EPA memorandum from Mark Schmidt, David Mintz, Tesh Rao, and Lance McCluney titled "Draft Analyses of PM Data for the PM NAAQS Review," January 31, 2005.

Air Sensor Standard Operating Procedures (SOPs)

Standard operating procedures developed by EPA of air sensors is available that includes instructions and guidance on how to use the technology.

Steps to Lead Safe Renovation, Repair and Painting

Guide for contractors/homeowners on how to plan for & complete a home renovation, repair or painting project in pre-1978 housing & child-occupied facilities using lead-safe work practices.

Characterizing Sources of Persistent and Emerging Air Pollution in North America

SmartWay Technology for Trucks and School Buses

This page provides links to the SmartWay verification process for manufacturers and the verified lists and information for fleet owners and operators.

Mi-Jack Products, Inc.— Tier 4F EcoCrane Hybrid System

EPA confirms verification request from Mi-Jack Products, Inc. regarding the EcoCrane Hybrid System (EcoCrane) replacing generators (Tier 0, 1, 2, 3) for non-road diesel engines on rubber tired gantry cranes (RTG), reducing emissions of criteria pollutants.

Caterpillar Technology—Marine Engine Emissions Upgrade Group Kit #7 (Tier 2 to Tier 3), Kit #8 (Tier 1 to Tier 3), Kit #9 (EUI to Tier 3) and Kit #10 (MUI to Tier 3)

This page includes Letter from EPA to Clean Diesel Group LLC approves request for verification of CDG’s Low Nitrogen Dioxide Filter (LNF) System for highway application reducing emissions of certain criteria pollutants.

EPA and CARB Approve Emissions Modification for Generation 1.1 SUV of the 3.0 Liter Subject Vehicles

EPA and CARB Approve Second Phase of Emissions Modifications for Generation 1.1 SUV of the 3.0 Liter Subject Vehicles (May 18, 2018)

Light-duty Vehicle and Motorcycle Manufacturers’ United States Representatives

This page provides a list of contact information of vehicle manufacturers' United States representatives.

Independent Commercial Importers (ICIs)

This page has a list of Independent Commercial Importers (ICIs), information on how to become and ICI, how to use an ICI to import a vehicle.

Exhaust Emission Impacts of Replacing Heavy Aromatic Hydrocarbons in Gasoline with Alternate Octane Sources

EPA, in collaboration with Environment and Climate Change Canada and seven global automakers, conducted a gasoline vehicle test program to quantify the emissions impacts of replacing a portion of high-boiling aromatics with alternative blending components.