[Code of Federal Regulations]
[Title 40, Volume 14]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR75.36]

[Page 273-274]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 75--CONTINUOUS EMISSION MONITORING--Table of Contents
 
             Subpart D--Missing Data Substitution Procedures
 
Sec. 75.36  Missing data procedures for heat input rate determinations.

    (a) When hourly heat input rate is determined using a flow 
monitoring system and a diluent gas (O2 or CO2) 
monitor, substitute data must be provided to calculate the heat input 
whenever quality-assured data are unavailable from the flow monitor, the 
diluent gas monitor, or both. When flow rate data are unavailable, 
substitute flow rate data for the heat input rate calculation shall be 
provided according to Sec. 75.31 or Sec. 75.33, as applicable. When 
diluent gas

[[Page 274]]

data are unavailable, the owner or operator shall provide substitute 
O2 or CO2 data for the heat input rate 
calculations in accordance with paragraphs (b) and (d) of this section.
    (b) 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 CEMS at that location), or (when implementing these 
procedures for a previously certified CO2 or O2 
monitor) during the 720 quality-assured monitor operating hours 
preceding implementation of the standard missing data procedures in 
paragraph (d) of this section, the owner or operator shall provide 
substitute CO2 or O2 data, as applicable, for the 
calculation of heat input (under section 5.2 of appendix F to this part) 
according to Sec. 75.31(b).
    (c) [Reserved]
    (d) Upon completion of 720 quality-assured monitor operating hours 
using the initial missing data procedures of Sec. 75.31(b), the owner or 
operator shall provide substitute data for CO2 or 
O2 concentration to calculate heat input rate, as follows. 
Substitute CO2 data for heat input rate determinations shall 
be provided according to Sec. 75.35(d). Substitute O2 data 
for the heat input rate determinations shall be provided in accordance 
with the procedures in Sec. 75.33(b), except that the term 
``O2 concentration'' shall apply rather than the term 
``SO2 concentration'' and the term ``O2 diluent 
monitor'' shall apply rather than the term ``SO2 pollutant 
concentration monitor.'' In addition, the term ``substitute the lesser 
of'' shall apply rather than ``substitute the greater of;'' the terms 
``minimum hourly O2 concentration'' and ``minimum potential 
O2 concentration, as determined under section 2.1.3.2 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).

[60 FR 26530, May 17, 1995, as amended at 64 FR 28604, May 26, 1999; 67 
FR 40439, June 12, 2002]