40 CFR Appendix Table 3 to Subpart Ec of Part 60 - Table 3 to Subpart Ec of Part 60—Operating Parameters To Be Monitored and Minimum Measurement and Recording Frequencies

Operating parameters to be monitored	Minimum frequency		Control system
	Data measurement	Data recording	Dry scrubber followed by fabric filter	Wet scrubber	Dry scrubber followed by fabric filter and wet scrubber
Maximum operating parameters:
Maximum charge rate	Continuous	1 × hour	✔	✔	✔
Maximum fabric filter inlet temperature	Continuous	1 × minute	✔		✔
Maximum flue gas temperature	Continuous	1 × minute	✔	✔
Minimum operating parameters:
Minimum secondary chamber temperature	Continuous	1 × minute	✔	✔	✔
Minimum dioxin/furan sorbent flow rate	Hourly	1 × hour	✔		✔
Minimum HCI sorbent flow rate	Hourly	1 × hour	✔		✔
Minimum mercury (Hg) sorbent flow rate	Hourly	1 × hour	✔		✔
Minimum pressure drop across the wet scrubber or minimum horsepower or amperage to wet scrubber	Continuous	1 × minute		✔	✔
Minimum scrubber liquor flow rate	Continuous	1 × minute		✔	✔
Minimum scrubber liquor pH	Continuous	1 × minute		✔	✔