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The National Emissions Inventory (NEI)Sally Dombrowski
EPA-OAQPS
What is the NEI?
• EPA’s compilation of estimates of air pollutants
discharged on an annual basis and their sources.
• Compilation includes emission estimates submitted by
tribal, state, and local air pollution control agencies
• Estimates calculated by EPA, and emissions obtained
from other sources
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EIS and the NEI• Emissions Inventory System (EIS)
• Data repository for air emissions data used to create NEI
• Contains state, local, tribal and EPA-submitted data• Can be multiple emissions values for the same
unit/process• Annual, monthly, daily data• Data available via password-protected web site
• EIS Gateway https://eis.epa.gov/eis-system-web/welcome.html
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EIS and the NEI (cont.)
• National Emissions Inventory (NEI)• Snapshot in time from EIS• Inventory version shared with the public• One emissions value per process selected• Annual emissions values
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How is the NEI created? • Your data has priority in our selection
• Only one file format is permitted: xml
• Data must pass QA prior to being submitted to EPA• Only incorrect data is rejected; all remaining
records accepted
• Availability to have multiple values and do several types of NEI selections
• Version done in 6 months or less
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Who Has Access to the NEI?• Tribal, state and local agency users of EIS Gateway
have access to their data and any National public releases
• States may authorize tribes READ-access-only to their data• This allows you to download data for direct import into
TEISS
• General public has no access to data until data released to public website
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Uses of the NEI
• NEI is one of key inputs for • Modeling of national rules – NAAQS
reviews, CSAPR, etc• Non-attainment designations• NATA Review – toxics risk modeling• Trends reports and analyses
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National Emissions Inventory (NEI)
• Created from S/L/T submitted data to Emissions Inventory System (EIS)
• General Public Release (GPR)• Separate Public Website
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ContactSally Dombrowski(919) [email protected]
Air Emissions Reporting Requirements (AERR) Rule
Reporting Requirement
• Air Emissions Reporting Rule (AERR) http://www.epa.gov/ttn/chief/aerr/ • Complete criteria pollutant inventory every 3 years
• All point sources (100 tpy potential to emit threshold)• Nonpoint sources• Onroad and Nonroad sources• Events (wildfires and prescribed fires)• 2011 emissions due 12/31/2012; EIS window opens 6/1/2012
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Reporting Requirement (cont.)
• Annual reporting for type A point source facilities
• SO2, NOx, CO with potential to emit > 2,500 tpy• VOC, PM, NH3 with potential to emit > 250 tpy• Pb with potential to emit > 5 tpy (to be amended to agree
with Lead NAAQS level of > 0.5 tpy)
• HAPs submitted voluntarily by many S/L/Ts, encouraged as part of an integrated report
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Annual Three-Year
Pollutant Major Type A Type B Nonattainment Areas
SOx >2500 >100 >100
VOC >250 O3 Moderate >100
VOC O3 Serious >50
VOC O3 Severe >25
VOC O3 Extreme >10
NOx >2500 >100 >100
CO >2500 >1000 O3 (All areas) >100
CO CO (All areas) >100
7439921 (Lead) >5 >5
PM10 >250 >100 PM10 Moderate >100
PM10 PM10 Serious >100
PM2.5 >250 >100 >100
NH3 >250 >100 >100
What is a Major Source?
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Reporting Changes in AERR
• 40 CFR 70 definition of major source now used for point source reporting• Potential to emit, not actual
• AERR requires emission reports within 12 months from end of inventory
• No biogenic emissions requirement
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Reporting Changes in AERR (cont.)
• Model inputs in lieu of emissions are preferred
• Summer day emissions of VOC and NOx for ozone nonattainment areas only
• Winter work weekday emissions of CO required for nonattainment areas and areas with maintenance plans
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Reporting Changes in AERR (cont.)
• Particulate Matter• Reporting of PM primary (sum of filterable and
condensible components) required under CERR
• Reporting of filterable and condensible components is a new requirement in AERR
• We added component-reporting requirement to help us understand what was being reported as PM primary
• New QA check• Report PM2.5; must report PM10
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What are the Reporting Cycles?
• Every-Year Cycle Reporting• Annual emissions from Type A (large) point
sources. If one pollutant qualifies source as Type A,
all pollutants must be reported
• Ozone season and summer day emissions of NOx
from sources controlled to meet TIP Call
requirements
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What are the Reporting Cycles?
• Three-Year Cycle Reporting• Annual emissions of criteria pollutants from all
sources
• Ozone season and summer day emissions of NOx from all sources
• Summer day emissions of NOx and VOC for ozone nonattainment areas
• Winter work week day emissions of CO for nonattainment areas and attainment areas with maintenance plans 18
Which pollutants need to be reported?
• Tribes should report emissions of the following pollutants• Volatile Organic Compounds (VOC)
• PM2.5 (Filterable, Condensable and Primary)
• PM10 (Filterable, Condensable and Primary)
• Nitrogen Oxides (NOx)
• Carbon Monoxide (CO)• Lead (7439921)
• Sulfur Dioxide (SO2)
• Ammonia (NH3)19
Will point source reporting for lead be changed?
• Lead NAAQS final rulemaking promulgated on October 15, 2008; changed Lead emission inventory point source threshold from 5 tons/year to 0.5 tons/year
• We intend to revise 5 tons/year threshold for Lead point sources in AERR to help identify potential for Lead point-source problems in attainment/unclassifiable areas under Lead NAAQS 20
What About HAPs and GHGs?
• Hazardous Air Pollutants (HAPs) reporting not required, but we encourage tribes to submit them on voluntary basis using requirements of AERR
• Greenhouse Gases (GHGs) reporting not required under AERR• GHG pollutants accepted in EIS
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Overview of the Tribal New Source Review (NSR) Rule
New Source Review• Final effective August 30, 2011• Establishes cost-effective preconstruction
permitting program for • New or modified minor sources• Minor modifications at major sources• New major sources or major modifications in
nonattainment areas
• Permitting mechanism for major sources to limit emissions to become synthetic minors*
• Allowing administration of program by tribes through delegation to EPA
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Major NSR Rule
• New major sources• Based on source’s PTE• Nonattainment areas – 100 tpy of any pollutant• Attainment areas – 100 or 250 tpy depending on
source type• Modifications to existing major sources
• Physical change in or change in method• Increase in net emissions resulting from change
must be significant
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Minor NSR Rule• Applies to
• New and modified minor sources
• Minor modifications at major sources
• Must obtain permit prior to construction
• Minor sources with potential to emit (PTE) equal to or greater than minor NSR thresholds
• Modifications at minor sources with allowable emissions increase equal to or greater than minor NSR thresholds
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Major/Minor NSR Rule
• At discretion of reviewing authority• Must install and operate control technology
• Required to submit air quality impact analyses as part of permit applications
• Assess impacts on national parks & wilderness areas
• Allow for opportunities for public involvement
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Training
• EPA training
• http://epa.gov/air/tribal/tribalnsr.html
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Contacts:Laura McKelvey
Phone: [email protected]
Raj RaoPhone: 919-541-5344
Jessica MontañezPhone: 919-541-3407
The Laypersons Guide to EPAesePresented by SJD, who works on the EIS/NEI in EIAG of OAQPS
What does it all mean?• AQS
• EMC
• EMCH
• WebFIRE
• FRS
• TRI
• EIS
• NEI
• CERR / CERs??
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AQS - Air Quality Systemhttp://www.epa.gov/ttn/airs/airsaqs/
• Monitoring Data
• Air Quality System (AQS) is EPA's repository of ambient air quality data
• AQS stores data from over 10,000 monitors; 5000 currently active
• State, local and tribal agencies collect the data and submit to AQS on periodic basis
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EMC - Emissions Measurement Center http://www.epa.gov/ttn/chief/efpac/index.html
• Test methods for measuring pollutants from smokestacks and other industrial sources
• Assistance in use and application of these methods
• Guidance on use of emission factors
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Emission Modeling Clearinghousehttp://www.epa.gov/ttn/chief/emch/index.html
• Database of platform data for modeling
• Modeling software
• Training courses
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WebFIREhttp://cfpub.epa.gov/webfire/• Depository of emission factors
• List of emission factors may be downloaded in .csv format (opens in Excel)
• SCCs not always up-to-date
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ir
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Federal Registry System http://www.epa.gov/enviro/html/fii/index.html
• Database of facilities subject to environmental regulations
• Contains S/L/T and EPA identifiers across all offices (air, water, waste)
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TRI – Toxic Release Inventoryhttp://www.epa.gov/tri/• HAP Data• Facility-reported• Provide communities with information about
toxic chemical releases and waste management activities
• Toxic Releases on Tribal Lands: EPA is hosting a TRI Webinar for tribal stakeholders to promote use and awareness of TRI in Indian Country and Alaska Native Villages http://www.chemicalright2know.org/ 43
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Training
• Air Pollution Training Institute
http://www.epa.gov/apti/course_topic.html
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Air Pollution Training Institute
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EIS-Emissions Inventory System• Secure website • Contains S/L/T submitted emission inventory• Used to develop the National Emissions
Inventory (NEI)• Data used in modeling and the development
of guidance and regulations• Contains multiple values• Annual reporting major sources• Tri-annual reporting of all sources
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