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) 541-3269dombrowski.sally@epa.gov

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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Contact for AERR

Marc Houyoux

919-541-3649

houyoux.marc@epa.gov

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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: 919-541-5497mckelvey.laura@epa.gov

Raj RaoPhone: 919-541-5344

rao.raj@epa.gov

Jessica MontañezPhone: 919-541-3407

montanez.jessica@epa.gov

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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