Emissions Inventory Overview-Part 2
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Transcript of Emissions Inventory Overview-Part 2
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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)