(a) The owner or operator of a unit with a continuous moisture monitoring system shall substitute for missing moisture data using the procedures of this section.
(b) Where no prior quality-assured moisture data exist, substitute the minimum potential moisture percentage, from section 2.1.5 of appendix A to this part, except when Equation 19-3, 19-4 or 19-8 in Method 19 in appendix A to part 60 of this chapter is used to determine NOX emission rate. If Equation 19-3, 19-4 or 19-8 in Method 19 in appendix A to part 60 of this chapter is used to determine NOX emission rate, substitute the maximum potential moisture percentage, as specified in section 2.1.6 of appendix A to this part.
(c) During the first 720 quality-assured monitor operating hours following initial certification at a particular unit or stack location (i.e., the date and time at which quality-assured data begins to be recorded by a moisture monitoring system at that location), the owner or operator shall provide substitute data for moisture according to Sec. 75.31(b).
(d) Upon completion of the first 720 quality-assured monitor operating hours following initial certification, the owner or operator shall provide substitute data for moisture as follows:
(1) Unless Equation 19-3, 19-4 or 19-8 in Method 19 in appendix A to part 60 of this chapter is used to determine NOX emission rate, follow the missing data procedures in Sec. 75.33(b), except that the term ``moisture percentage'' shall apply rather than ``SO2 concentration;'' the term ``moisture monitoring system'' shall apply rather than the term ``SO2 pollutant concentration monitor;'' the term ``substitute the lesser of'' shall apply rather than ``substitute the greater of;'' the terms ``minimum hourly moisture percentage'' and ``minimum potential moisture percentage, as determined under section 2.1.5 of appendix A to this part'' shall apply rather than, respectively, the terms ``maximum hourly SO2 concentration'' and ``maximum potential SO2 concentration, as determined under section 2.1.1.1 of appendix A to this part;'' and the terms ``10th percentile'' and ``5th percentile'' shall apply rather than, respectively, the terms ``90th percentile'' and ``95th percentile'' (see Table 1 of Sec. 75.33).
(2) When Equation 19-3, 19-4 or 19-8 in Method 19 in appendix A to part 60 of this chapter is used to determine NOX emission rate:
(i) Provided that none of the following equations is used to determine SO2 emissions, CO2 emissions or heat input: Equation F-2, F-14b, F-16, F-17, or F-18 in appendix F to this part, or Equation 19-5 or 19-9 in Method 19 in appendix A to part 60 of this chapter, use the missing data procedures in Sec. 75.33(b), except that the term ``moisture percentage'' shall apply rather than ``SO2 concentration,'' the term ``moisture monitoring system'' shall apply rather than ``SO2 pollutant concentration monitor,'' and the term ``maximum potential moisture percentage, as defined in section 2.1.6 of appendix A to this part'' shall apply, rather than ``maximum potential SO2 concentration;'' or
(ii) If any of the following equations is used to determine SO2 emissions, CO2 emissions or heat input: Equation F-2, F-14b, F-16, F-17, or F-18 in appendix F to this part, or Equation 19-5 or 19-9 in Method 19 in appendix A to part 60 of this chapter, the owner or operator shall petition the Administrator under Sec. 75.66(l) for permission to use an alternative moisture missing data procedure. [64 FR 28604, May 26, 1999, as amended at 67 FR 40439, June 12, 2002] Sec. Sec. 75.38-75.39 [Reserved]