Department ofthe Environment



### Statement of Purpose 

# TECHNICAL SUPPORT DOCUMENT COMAR 26.11.31 Quality Assurance Requirements for Continuous Opacity Monitors (COMs) December 3, 2010

The purpose of thi s action is to : ( 1) Repeal the current regulations under CO MAR 26.11.31 to reflect the repeal ofthe Small Business Pollution Compliance Loan Fund eff e ct ive October 1, 2009 (House Bill 1416); and (2) Codify the quality assurance (QA) and quality control (QC) procedures for continuous opacity monitors (COMs). The procedures are currently contained in the Department's Technical Memorandum 90-01 (TM). This action will be s ubmitted to the U.S. Environme ntal Protection Agency (EPA) for approval as part of Maryland's State Implementation Plan. Background The TM was adopted in 1991 when continuous emissions monitoring requirements were first promul gated by the State. Those reg ulations were approved as part o f the Department's continuous emission monitoring program by the EPA on February 28, 1996. It is now necessary to promul gate a reg ulation codifyin g the QA and QC procedures found in the TM because the Department proposes to terminate its use. Specifically, the QA and QC procedures for COM s which are currently applied through use of the TM will be incorporated in this new chapter, COMAR 26.11.31. These proposed reg ulations incorporate by ref erence the current federal performance and desi gn specification requirements for the operation ofopacity monitoring systems. To the extent that the EPA adopts revised requirements in the future, the Departme nt will review those federal procedures and consider amendment of its reg ulation to adopt and incorporate any federal QA andQCs. 

### Sources Affected This action aff e cts any source required to install and operate COMs, including fuel burnin g equipment with a heat input capacity of 100 million Btu per hour, cement plants and municipal waste combusto rs . These sources currently utilize the p r oposed QA and QC procedures, as found in Part II of the TM.
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### Expected Emissions Reductions There are no emission reductions as a result of this action. 

### Economic Impact The proposed action has no economic impact because the proposed procedures in this chapter are identical to the procedures currently applied through use ofthe TM
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### Comparison to Federal Standards This chapter is not more stringent that the federal requirements for Quality Assurance Requirements for Continuous Opacity Monitors (COMs). ( 1) Performance Specification 1 (PS 1) under 40 CFR Part 60, Appendix B (2) " Performance Audit Procedures for Opacity Monitors" EPA 450/4-92-010 March , 1992
. Atmospheric Research and Exposure Assessment Laboratory, Research Triangle Park, North Carolina, 27711. (3) 40 CFR Part 60 Standards of Performance for New Stationary Sources, Subpart Da Standards ofPerformance for Electric Utility Steam Generating Units for which Construction is Commenced after September 18, 1978
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### EPA 450/4-92-01 0



## TECHNICAL ASSISTANCE DOCUMENT PERFORMANCE AUDIT PROCEDURES FOR · OPACITY MONITORS

MARCH 1992



### available on EPA website at: http://www.epa.gov/nepis/Pubs/45049201 O.pdf