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EI Data and Calculations

Melinda Ronca-Battista,

ITEP/TAMS Center

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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 Travelled (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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Homework due in 5 days:Make a list of nonpoint sources on the

reservation that you plan to include in your EIReview Section 8.0 of the ITEP Tribal EI

QAPP template. Use TEISS calculators to write out estimation methods and data you need to collect for the nonpoint sources, similar to Table 6 in QAPP template

Write up the Nonpoint section of your QAPP and email it to instructors

(Image taken from PetsForPatriots.org)