Search Frequent Questions
Filter By:
- Air Emissions Inventories Total results: 34
- Asbestos Total results: 141
- Butte Area/Silver Bow Creek Total results: 17
- Coronavirus (COVID-19) Total results: 33
- East Palestine, Ohio Train Derailment Total results: 148
- Emergency Planning and Community Right-to-Know Total results: 301
-
Fuel Program
Total results: 693
- Fuels and Fuel Additives (FFARs) Total results: 2
- Diesel Sulfur Program Total results: 7
- E15 comments Total results: 1
- Gasoline Sulfur Program Total results: 17
- Other Total results: 6
- Reformulated Gasoline and Anti-Dumping Total results: 431
- Registration Total results: 9
- Registration and Reporting under 40 CFR 79 Total results: 19
- Renewable Fuel Standard (RFS1) Total results: 67
- Renewable Fuel Standard (RFS2) Total results: 111
- Reporting Total results: 22
- Great Lakes Funding Total results: 92
- Lead Total results: 401
- MOVES Total results: 57
- Norwood Landfill Site Total results: 30
- Oil Regulations Total results: 96
- Permitting Under the Clean Air Act Total results: 19
- Radiation Total results: 1
- Risk Management Program (RMP) Total results: 285
- Southeast Minnesota Groundwater Total results: 11
Displaying 1 - 6 of 6 results
-
What sources make up the Tier 1 categories used in the emissions trends?
Tier 1 categories are assigned by source classification codes (SCCs) that are the most specific processes available in the NEI. The latest SCC list with the Tier 1 assignments can be downloaded from the EPA SCC website in Comma Separate Values (CSV) format.
- Last published:
-
What is the cause of the large decrease in electric utility emissions, particularly sulfur dioxide, starting in 1995?
SO2 emissions reductions from utilities during this time are primarily attributed to the impacts of the acid rain program. As described on EPA’s Acid Rain Program web page, Phase 1 of this program began in 1995 and affected 263 units at 110 most coal-burning electric utility plants in 21 eastern…
- Last published:
-
If I certify a nonroad flexible-fuel engine under 40 CFR Part 1054, are owners and operators prohibited from using gasoline-ethanol blended fuels containing greater than 10 volume percent ethanol under 40 CFR 80.1504(a)(1) in my nonroad flexible-fuel engi
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . No, owners and operators of nonroad engines, vehicles, and equipment where the nonroad engine is certified under 40 CFR Part 1054 as a flexible-fuel engine are not prohibited from using gasoline-ethanol blended fuels containing greater than 10 volume…
- Last published:
-
Why do mobile source NOx emissions jump higher between 2001 and 2002 on the emissions trends?
The emissions model used for mobile sources changed from MOBILE6.2 to MOVES 2010 in December 2009. This change included a notable increase in NOx emissions. The EPA adjusted data back to 2002 to reflect the change in models. The higher emissions in 2002 are because of this method change and…
- Last published:
-
Can product codes satisfy the product transfer documentation requirements set forth at 40 C.F.R. 80.1503(a)?
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help . EPA believes that parties normally are able to meet the product transfer requirements by including the required information in the documents that the parties currently use to memorialize the transfer of title or custody of the gasoline. Product…
- Last published:
-
Why do the PM2.5 emissions for the electric utilities source category jump up between 1998 and 1999?
The estimation method for PM emissions from fuel combustion sources was enhanced beginning with the 1999 National Emissions Inventory. Prior to 1999, the emissions measurement data methodology only included the filterable portion (which means the solid particle matter at elevated stack temperatures). Beginning with the 1999 NEI, both the filterable…
- Last published: