Minnesota Administrative Rules
Agency 167 - Pollution Control Agency
Chapter 7011 - STANDARDS FOR STATIONARY SOURCES
INDIRECT HEATING FOSSIL-FUEL-BURNING EQUIPMENT
Part 7011.0540 - DERATE

Universal Citation: MN Rules 7011.0540

Current through Register Vol. 49, No. 13, September 23, 2024

The owner or operator of indirect heating equipment who elects to achieve compliance with an applicable standard of performance by derating must:

A. advise the commissioner in writing of the intent to achieve compliance by derating and the capacity level at which the owner or operator intends to operate this equipment;

B. agree to a permit condition in the required operating permit that prohibits operating the equipment over the derate level;

C. install a boiler steam flow meter to continuously record, indicate, and integrate boiler steam flow, and must:

(1) submit a written report to the commissioner within ten days of any excess steam flow occurrence above the specified derate load;

(2) use a one-hour averaging period in determining an excess above derate with corrections for deviations in steam pressure or temperature if required;

(3) submit written yearly reports to the commissioner confirming that no excesses have occurred during normal operations; and

(4) retain and make available for inspection by the commissioner or the commissioner's authorized employees or agents steam flow charts for a minimum of two years after the date of measurement; and

D. submit an effective method of physical limitation of boiler load for approval by the commissioner before authorization of a boiler derate. The limitation may include a tieback signal from the steam flow meter to the combustion control system cutting back fuel input at the derate load, a maximum limit stop on the fuel input control drive or valve, or other equivalent physical means.

Statutory Authority: MS s 116.07

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