Source: https://www.law.cornell.edu/cfr/text/40/appendix-C_to_part_75
Timestamp: 2018-01-22 22:35:08
Document Index: 696269528

Matched Legal Cases: ['art 75', 'art 75', 'art_75', 'art 75', 'art 75', '§ 75', '§ 75', '§ 75', '§ 75', 'art.\n3', '§ 75', '§ 75']

40 CFR Appendix C to Part 75, Missing Data Estimation Procedures | US Law | LII / Legal Information Institute
CFR › Title 40 › Chapter I › Subchapter C › Part 75 › Subpart H › Appendix C_to_part_75
40 CFR Appendix C to Part 75, Missing Data Estimation Procedures
Appendix C to Part 75 - Missing Data Estimation Procedures
1.2 Petition Requirements
1.2.1 Parameters for Wet Flue Gas Desulfurization System
1.2.1.1 Number of scrubber modules in operation.
1.2.1.2 Total slurry rate to each scrubber module (gal per min).
1.2.1.3 In-line absorber pH of each scrubber module.
1.2.1.4 Pressure differential across each scrubber module (inches of water column).
1.2.1.5 Unit load (MWe).
1.2.1.6 Inlet and outlet SO2 concentration as determined by the monitor or missing data substitution procedures.
1.2.1.7 Percent solids in slurry for each scrubber module.
1.2.1.8 Any other parameters necessary to verify scrubber removal efficiency, if the Administrator determines the parameters above are not sufficient.
1.2.2 Parameters for Dry Flue Gas Desulfurization System
1.2.2.1 Number of scrubber modules in operation.
1.2.2.2 Atomizer slurry flow rate to each scrubber module (gal per min).
1.2.2.3 Inlet and outlet temperature for each scrubber module (°F).
1.2.2.4 Pressure differential across each scrubber module (inches of water column).
1.2.2.5 Unit load (MWe).
1.2.2.6 Inlet and outlet SO2 concentration as determined by the monitor or missing data substitution procedures.
1.2.2.7 Any other parameters necessary to verify scrubber removal efficiency, if the Administrator determines the parameters above are not sufficient.
1.2.3 Parameters for Other Flue Gas Desulfurization Systems
1.2.4 Parameters for Post-Combustion NOX Emission Controls
1.2.4.1 Inlet air flow rate to the unit (boiler) (mcf/hr).
1.2.4.2 Excess oxygen concentration of flue gas at stack outlet (percent).
1.2.4.3 Carbon monoxide concentration of flue gas at stack outlet (ppm).
1.2.4.4 Temperature of flue gas at outlet of the unit (°F).
1.2.4.5 Inlet and outlet NOX emission rate as determined by the NOX continuous emission monitoring system or missing data substitution procedures.
1.2.4.6 Any other parameters specific to the emission reduction process necessary to verify the NOX control removal efficiency, (e.g., reagent feedrate in gal/mi).
1.3 Correlation of Emissions With Parameters
1.4.1 Use the following equation to calculate substitute data for filling in missing (outlet) SO2 pollutant concentration monitor data.
1.4.2 Use the following equation to calculate substitute data for filling in missing (outlet) NOX emission rate data.
1.5.1 If both the inlet and the outlet SO2 pollutant concentration monitors are unavailable simultaneously, use the maximum inlet SO2 concentration recorded by the inlet SO2 pollutant concentration monitor during the previous 720 quality-assured monitor operating hours to substitute for the inlet SO2 concentration in equation C-1 of this appendix.
1.5.2 If both the inlet and outlet NOX continuous emission monitoring systems are unavailable simultaneously, use the maximum inlet NOX emission rate for the corresponding unit load recorded by the NOX continuous emission monitoring system at the inlet during the previous 2160 quality-assured monitor operating hours to substitute for the inlet NOX emission rate in equation C-2 of this appendix.
2.2.1 For a single unit, establish ten operating load ranges defined in terms of percent of the maximum hourly average gross load of the unit, in gross megawatts (MWge), as shown in Table C-1. (Do not use integrated hourly gross load in MW-hr.) For units sharing a common stack monitored with a single flow monitor, the load ranges for flow (but not for NOX) may be broken down into 20 operating load ranges in increments of 5.0 percent of the combined maximum hourly average gross load of all units utilizing the common stack. If this option is selected, the twentieth (uppermost) operating load range shall include all values greater than 95.0 percent of the maximum hourly average gross load. For a cogenerating unit or other unit at which some portion of the heat input is not used to produce electricity or for a unit for which hourly average gross load in MWge is not recorded separately, use the hourly gross steam load of the unit, in pounds of steam per hour at the measured temperature (°F) and pressure (psia) instead of MWge. Indicate a change in the number of load ranges or the units of loads to be used in the precertification section of the monitoring plan.
Table C-1 - Definition of Operating Load Ranges for Load-based Substitution Data Procedures
2 >10-20
3 >20-30
4 >30-40
5 >40-50
6 >50-60
7 >60-70
8 >70-80
9 >80-90
10 >90
2.2.2 Beginning with the first hour of unit operation after installation and certification of the flow monitor or the NOX-diluent continuous emission monitoring system (or a NOX concentration monitoring system used to determine NOX mass emissions, as defined in § 75.71(a)(2)), for each hour of unit operation record a number, 1 through 10, (or 1 through 20 for flow at common stacks) that identifies the operating load range corresponding to the integrated hourly gross load of the unit(s) recorded for each unit operating hour.
2.2.3 Beginning with the first hour of unit operation after installation and certification of the flow monitor or the NOX-diluent continuous emission monitoring system (or a NOX concentration monitoring system used to determine NOX mass emissions, as defined in § 75.71(a)(2)) and continuing thereafter, the data acquisition and handling system must be capable of calculating and recording the following information for each unit operating hour of missing flow or NOX data within each identified load range during the shorter of: (a) the previous 2,160 quality-assured monitor operating hours (on a rolling basis), or (b) all previous quality-assured monitor operating hours.
2.2.3.1 Average of the hourly flow rates reported by a flow monitor, in scfh.
2.2.3.2 The 90th percentile value of hourly flow rates, in scfh.
2.2.3.3 The 95th percentile value of hourly flow rates, in scfh.
2.2.3.4 The maximum value of hourly flow rates, in scfh.
2.2.3.5 Average of the hourly NOX emission rate, in lb/mmBtu, reported by a NOX continuous emission monitoring system.
2.2.3.6 The 90th percentile value of hourly NOX emission rates, in lb/mmBtu.
2.2.3.7 The 95th percentile value of hourly NOX emission rates, in lb/mmBtu.
2.2.3.8 The maximum value of hourly NOX emission rates, in lb/mmBtu.
2.2.3.9 Average of the hourly NOX pollutant concentrations, in ppm, reported by a NOX concentration monitoring system used to determine NOX mass emissions, as defined in § 75.71(a)(2).
2.2.3.10 The 90th percentile value of hourly NOX pollutant concentration, in ppm.
2.2.3.11 The 95th percentile value of hourly NOX pollutant concentration, in ppm.
2.2.3.12 The maximum value of hourly NOX pollutant concentration, in ppm.
2.2.4 Calculate all monitor or continuous emission monitoring system data averages, maximum values, and percentile values determined by this procedure using bias adjusted values in the load ranges.
2.2.5 When a bias adjustment is necessary for the flow monitor and/or the NOX-diluent continuous emission monitoring system (and/or the NOX concentration monitoring system used to determine NOX mass emissions, as defined in § 75.71(a)(2)), apply the adjustment factor to all monitor or continuous emission monitoring system data values placed in the load ranges.
2.2.6 Use the calculated monitor or monitoring system data averages, maximum values, and percentile values to substitute for missing flow rate and NOX emission rate data (and where applicable, NOX concentration data) according to the procedures in subpart D of this part.
3.2.2 In the electronic quarterly report required under § 75.64, indicate for each hour of unit operation the operational bin associated with the NOX or flow rate data, by recording the number assigned to the bin under section 3.2.1 of this appendix.
3.2.3 The data acquisition and handling system must be capable of properly identifying and recording the operational bin number for each unit operating hour. The DAHS must also be capable of calculating and recording the following information (as applicable) for each unit operating hour of missing flow or NOX data within each identified operational bin during the shorter of:
3.2.3.1 Average of the hourly flow rates reported by a flow monitor (scfh).
3.2.3.2 The 90th percentile value of hourly flow rates (scfh).
3.2.3.3 The 95th percentile value of hourly flow rates (scfh).
3.2.3.4 The maximum value of hourly flow rates (scfh).
3.2.3.5 Average of the hourly NOX emission rates, in lb/mmBtu, reported by a NOX-diluent continuous emission monitoring system.
3.2.3.6 The 90th percentile value of hourly NOX emission rates (lb/mmBtu).
3.2.3.7 The 95th percentile value of hourly NOX emission rates (lb/mmBtu).
3.2.3.8 The maximum value of hourly NOX emission rates, in (lb/mmBtu).
3.2.3.9 Average of the hourly NOX pollutant concentrations (ppm), reported by a NOX concentration monitoring system used to determine NOX mass emissions, as defined in § 75.71(a)(2).
3.2.3.10 The 90th percentile value of hourly NOX pollutant concentration (ppm).
3.2.3.11 The 95th percentile value of hourly NOX pollutant concentration (ppm).
3.2.3.12 The maximum value of hourly NOX pollutant concentration (ppm).
3.2.4 When a bias adjustment is necessary for the flow monitor and/or the NOX-diluent continuous emission monitoring system (and/or the NOX concentration monitoring system), apply the bias adjustment factor to all data values placed in the operational bins.
3.2.5 Calculate all CEMS data averages, maximum values, and percentile values determined by this procedure using bias-adjusted values.
3.2.6 Use the calculated monitor or monitoring system data averages, maximum values, and percentile values to substitute for missing flow rate and NOX emission rate data (and where applicable, NOX concentration data) according to the procedures in subpart D of this part.
[ 58 FR 3701, Jan. 11, 1993, as amended at 60 FR 26547, 26548, May 17, 1995; 63 FR 57313, Oct. 27, 1998; 64 FR 28652, May 26, 1999; 67 FR 40459, June 12, 2002]