Final Revisions to AP-42 Chapter 11, Section 6 - Portland Cement Manufacturing

Background 

EPA created an emissions factor development team to create new and updated emissions factors for WebFIRE and AP-42 based on test data submitted to the Agency in response to federal electronic reporting requirements.  There was a 60 day public comment period that ended on January 11, 2022.  No comments were received.

Emission Factor Summary Table

Source Classification Code (SCC)	Control	Pollutant	Draft Factor (lb/tons clinker produced)	Existing Factor (lb/tons clinker produced)	Difference (%)	Factor Quality Rating**	Number of Individual Test Data Included (Excluded)	Draft Date	Finalized Date
305006231	Fabric Filter	Nitrogen Oxides (NOx)	4.10	N/A	N/A	Moderately	9 (15)	11/12/2021	3/22/2022

¹30500623 - Industrial Processes; Mineral Products; Cement Manufacturing (Dry Process); Preheater/Precalciner Kiln

**Value represents new quality ratings given to factors based on Emissions Factors Procedures Document. Factors are given quality ratings based on representativeness of factor (i.e. Moderately = Moderately representative of the population)

AP-42 Chapter 11, Section 6 - Portland Cement Manufacturing

Final AP-42 Chapter 11, Section 6 - Portland Cement Manufacturing (pdf) (493.42 KB)

Draft AP-42 Chapter 11, Section 6 - Portland Cement Manufacturing (pdf) (493.18 KB)

Red Line Strike Out AP-42 Chapter 11, Section 6 - Portland Cement Manufacturing (pdf) (936.66 KB)

Emission Factor Background Data 

Underlying Data for NOx/Fabric Filter/30500623 Factor (xlsx) (16.22 KB)

Underlying data for each test point can be viewed by clicking the link for the project data set (PDS). For project data sets created using the Electronic Reporting Tool (ERT; access database), we recommend using the ERT tool to view the submitted test data. Please see the ERT user's guide for more information. Each report used to create these factors can also be retrieved from WebFIRE through the 'Search for Reports' function.