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Emissions Inventory Overview-Part 2

Melinda Ronca-Battista,

ITEP/TAMS Center

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Group Discussion of Homework

What level did you select for your EI?

Why did you select this level?What sources are on your

reservation that you know about?

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Quantifying EmissionsExamples

1,000 tons/year NOx from a gas plant:

50 tons/day CO from on-road vehicles in Phoenix:

10 pounds/year mercury from a small power plant:

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How Are Emissions Estimated?Continuous Emissions Monitoring

Systems (CEMS) Or Source Testing

EPA Emission Estimation Models◦TANKS◦LANDGEM◦WATER9◦MOVES◦NONROAD

Material BalanceEmission Factors

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Quantifying EmissionsEmission Factor

◦ Conversion factor provided by EPA (AP-42) or other source to quantify emissions

◦ E.g., lbs mercury emitted per ton of coal burned

Activity◦ Collected by the person that estimates

the emissions ◦ Process data (tons of coal burned,

hours of operation)Emission Factor and Activity

used to estimate Emission rate for a single pollutant◦ E.g., 10 pounds/year mercury from

small power plant

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Quantifying (cont.)Basic estimating equation

E = EF x A = EF x activity (throughput)

Where◦ E = Emissions rate (TEISS calculates)◦ EF = Emission factor (TEISS provides)◦ A = Activity (aka throughput, that you collect and

enter into TEISS calculators)

E

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Where do I get the necessary data to calculate emissions?Process activity

◦Directly from source◦From permits◦Monitoring/CEMs◦Questionnaires/Surveys

LOTS of info on the internet

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For each type of source:Coming up, Data Collection slides

and TEISS Data Entry slides for each source type

Data Collection slides ◦Information you collect in real world

termsTEISS Data Entry slides

◦TEISS has a structure based on the NEI

◦Slides explain how data you collect fits into the structure

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Point Source Data CollectionPhysical Location (address, lat/long)

Stack parameters ◦Height◦Diameter◦Flowrate◦Exit gas temperature

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Point Source Data Collection (cont.)

Process-level information, leads to SCC selection◦Flow diagram◦Materials being consumed (type and

amount)◦Boiler throughput◦Operating schedules◦Control devices/efficiencies

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Point Source TEISS Data Entry• Facility Data

– Site Name – Physical Location (address, lat/long)

• Release Points • Emission Units • Processes • Control Equipment?• Period (time frame-usually annual)• Emissions (you can enter or calculate

with TEISS)

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Nonpoint Source Data CollectionProcess information

◦ Leads to SCC selection ◦ Types of operations

Gasoline storage tank refilling Unpaved roads

“Activity data” needed to calculate emissions◦ Type of refilling process (splash or

submerged)◦ VMT, vehicle weight, speed, road silt

content, etc.Pollution-management practices or

control measures◦ Dust abatement with water or petro-based

chemical

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Nonpoint Source TEISS Data EntryLocation◦If enter data for on-reservation

sources, your reservation◦If import county-level data from NEI

database, a county

Process--leads to SCC selectionControl Equipment/Measures Period (usually annual)Emissions (you can enter or

calculate with TEISS)

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Mobile Source Data CollectionOn-Road

◦Road types◦Vehicle types & use◦Vehicle Miles Traveled (VMT)

Off-Road◦Engine types◦Horsepower◦Hours of use

Model used to estimate emissions

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Mobile Source TEISS Data EntryLocation

◦If enter data for on-reservation sources, your reservation

◦If import county-level data from NEI database, a county

ProcessesPeriodEmissions (you enter from your

estimates based on road lengths/types or from EPA model calculations)

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Fire Data CollectionSpecial Case: covers large area,

like nonpoint sources, but in defined location like point sources

Data elements include◦ Dates of fire◦ Latitude/Longitude coordinates◦ Fire type (man-made or natural)◦ Acres burned

New EPA format and TEISS treat fires as EVENTS

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Fire TEISS Data EntryEvent IdentificationPeriod (dates)Location

◦If enter data for on-reservation fires, your reservation

◦If import county-level data from NEI database, a county

Geographic CoordinatesProcesses (prescribed burn or

wildfire)Emissions (from EPA or calculated

with TEISS)

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In Summary, a Final EI is…A list of air pollution sources for a

defined:◦area (reservation)◦time period (e.g., a year)

Information about each source (address, activities/processes)

Estimate of emission rate for each source

How you constructed the estimates

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An EI also contains…Charts/graphs to display and

summarize quantitative dataMapsBackground information or other

information about your area related to emissions/sources

Copies of surveys, calculations used, references, that you record in a dedicated notebook

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Homework due in 5 days:Read the Bishop Paiute Tribe EI to

get a sense of what is included in an EI.

Answer the questions in the Homework_EIOverviewPart2 document.

Email your answers to the instructors

Hint: just do it now while you remember

(Image taken from PetsForPatriots.org)