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Unit Conversions and EI Codes

Angelique LuedekerITEP/TAMS Center

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Unit Conversions and TEISS

TEISS does some of the math for you

Emission Factor (EF) x Activity Data = Emissions

TEISS provides EFYou provide activity data

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Activity Data ExampleThe Total Area Tilled value you enter needs to be in units of acres

If you have collected data in other units, for example, square miles, you need to convert square miles to acres

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Emission FactorsEF is basically a factor for how much pollutant is emitted for a particular throughput

ExamplesLbs of PM10 emitted/acre of area tilledLbs of PM2.5 emitted/vehicle mile traveledLbs of mercury emitted/ton of coal burned

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Unit Converter in TEISSTEISS has unit conversion tool

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TEISS Unit Conversion Tool

Area is selected, shows list of area units

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TEISS Unit Conversion Tool

Mass is selected, shows list of mass units

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Energy Unit Conversion

Converting energy units often requires knowing energy density of a given material

Energy density can vary within the same material

TEISS Unit Converter tool cannot convert energy to other unit categories, such as volume

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Energy Density

ExamplesNatural gas from different sources provides differing amounts of energy

High-heating value gas has 1027 BTUs/ft3

Low-heating value gas has 930 BTUs/ft3

Most gas is somewhere in-betweenDifferent kinds of wood provide different amounts of heat when burned

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Energy Density DefaultsWhat if you don’t know energy density of your reservation’s natural gas or wood?

Use defaultsFor natural gas, EPA’s AP-42 gives 1020 BTUs/ft3

For wood, TEISS provides a converter within the wood-burning calculators

Allows you to enter volume of wood (cords) and specify wood typeThen it calculates tons of wood per cord required to do calculation

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CODES!!!CODES!!!Why do we need them?

Computers organize information by codesStandardize descriptions and categories

ExamplesStates – CO, Co, Colo., ColoradoA computer sees 08, the FIPS code for Colorado

Takes guesswork outOne long code signifies a paragraph-long process description

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Tribal EIS CodesTribal EIS Codes

FIPS - Federal Information Processing Standard codes are used for states and counties

Tribal EIS codes: Kickapoo = 861 (3 digit)

States and counties use FIPs codesExample

Kansas FIPS code = 20 (2 digit)Brown County FIPS code = 013 (3 digit)

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SCC - Source Classification SCC - Source Classification CodesCodes

Approximately 9,000 valid codesMaintained / categorized by U.S. EPA

Source ClassificationPoint = 8 charactersNonpoint, Non-Road, On-Road, Event and Biogenic = 10 characters

EVERY PROCESS in TEISS must have an SCC!

Used as primary identifying data element in EPA's National Emission Inventory (NEI)

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SCC for Point SourcesSCC for Point Sources

Example: 30200501

3-02-005-01 = 8-characters

For each SCC, there are four levels of descriptions

SCC 1 Description (3): Industrial ProcessesSCC 3 Description (02): Food and AgricultureSCC 6 Description (005): Feed and Grain Terminal ElevatorsSCC 8 Description (01): Shipping and Receiving

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SCC for Nonpoint and SCC for Nonpoint and Other SourcesOther Sources

Example: 2610030000

26-10-030-000 = 10 characters

For each SCC, four levels of descriptionsSCC 2 Description (26): Waste Disposal, Treatment, and RecoverySCC 4 Description (26-10): Open BurningSCC 7 Description (26-10-030): ResidentialSCC 10 Description (26-10-030-000): Household Waste

Only 1 of each SCC in a location (reservation) because nonpoint SCC emissions are combined (unless emission type is diff: evap, exhaust, refueling are diff types of emissions from same SCC)

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SIC and NAICS CodesSIC and NAICS Codes

SIC - Standard Industrial Classification

NAICS – North American Industry Classification System

Economic sector codes

Beginning in 1997, SIC replaced by NAICS

NAICS reorganizes categories on production/process-oriented basis 

EVERY POINT SOURCE in TEISS must have a NAICS Code!

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TEISS View –NAICS Codes – TEISS View –NAICS Codes – How to Find ThemHow to Find Them

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Homework due in 5 days (2 files):

Answer the questions in the UnitConversionExercise document. There are two pages of questions

Use TEISS to determine SCCs of sources in the Homework_EICodes document

Email your answers to both assignments to the instructors