1 emissions inventory overviewpart 2 melinda ronca-battista, itep
DESCRIPTION
3 Quantifying (cont.) Basic estimating equation E = EF x A Control efficiency equation E = A x EF X (1-ER/100) Where ◦ E = Emissions rate (TEISS calculates) ◦ EF = Emission factor (TEISS provides) ◦ A = Activity (You collect and enter into TEISS) ◦ ER = overall emission reduction efficiency (%) Emission reduction (ER) efficiency not as important in simpler calculationsTRANSCRIPT
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Emissions Inventory Emissions Inventory Overview–Part 2Overview–Part 2
Melinda Ronca-Battista, ITEP
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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 burnedActivity
◦ Collected by YOU◦ Process data (tons of coal burned, hours of
operation)◦ Control measures (efficiency/presence of
control equipment or procedures) Estimates 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
Control efficiency equation E = A x EF X (1-ER/100)
Where◦ E = Emissions rate (TEISS calculates)◦ EF = Emission factor (TEISS provides)◦ A = Activity (You collect and enter into TEISS)◦ ER = overall emission reduction efficiency
(%) Emission reduction (ER) efficiency not as important
in simpler calculations
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Where do I get activity data?Process activity
◦Directly from source◦From permits◦Monitoring/CEMs◦Questionnaires/Surveys
Control efficiency◦Engineering estimates◦From permits
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Point Sources–Data ElementsLocation (address, lat/long)Stack parameters
◦Height◦Diameter◦Flowrate◦Exit gas temperature
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Point Sources–Data Elements (cont.)
Process-level information◦Flow diagram◦Materials being consumed (type and
amount)◦Sub-processes involved◦Boiler throughput◦Operating schedules◦Control devices/efficiencies
See the AERR for details
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Point Source Data for TEISSLocation (address, lat/long)Facility/Site Name Release Points Emission Unit
◦Processes Control Equipment? Period (Time Frame) Emissions
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Nonpoint Source DataLocation (your reservation)Process information Control equipment/measures
◦Period (time frame) Emissions
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Nonpoint Source Data ElementsProcess information
◦Types of operations Gasoline storage tank refilling Unpaved roads
◦Emissions (e.g. VOCs, PM)◦“Activity data” needed to calculate
emissions Type of refilling process (splash or submerged) VMT, vehicle weight, speed, silt content, etc.
◦Pollution-management practices or control measures Dust abatement with water or petro-based
chemical
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Mobile Source Data ElementsVehicle Miles Traveled (VMT)Road surface typesVehicle types & useOff-road sources & use
◦ Engine types, hours of use, season, etc.Mobile source data or emissions
factors will typically come from other sources (DOT, air district, etc.)
Adjust data according to your reservation (“top-down approach”)
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Mobile Source DataOn-Road and Non-Road
◦Location (your reservation) Processes
Period Emissions
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Fire DataSpecial Case: covers large area,
like nonpoint sources, but in defined location like point sources
New EPA format and TEISS 2.0 treat fires as EVENTS
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In Summary, a Final EI is…A list of air pollution sources
◦For a defined area (reservation)◦For a defined time period (e.g., a year)
Information about each source (address, activities/processes occurring at a facility)
Estimate of emission rate for each source
Information on how you determined sources and emissions estimates
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An EI can also contain…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, etc.