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IDEM > Reporting > Emissions Reporting > Guidance Materials for the Emissions Statement > Emissions Estimation Method Codes Emissions Estimation Method Codes

Codes Description
1 Source Test
2 i-STEPS Equation or Material Balance
3 Manually Calculated Using AP-42/FIRE
4 Best Guess
5 Manually Calculated Using Local Emission Factor
6 New Construction
7 Source Closed
8 i-STEPS Calculated using AP-42/FIRE
9 i-STEPS Calculated Using Local Emission Factor

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