[Title 40 CFR 60.47b]
[Code of Federal Regulations (annual edition) - July 1, 2002 Edition]
[Title 40 - PROTECTION OF ENVIRONMENT]
[Chapter I - ENVIRONMENTAL PROTECTION AGENCY]
[Subchapter C - AIR PROGRAMS (CONTINUED)]
[Part 60 - STANDARDS OF PERFORMANCE FOR NEW STATIONARY SOURCES]
[Subpart Db - Standards of Performance for Industrial-Commercial-]
[Sec. 60.47b - Emission monitoring for sulfur dioxide.]
[From the U.S. Government Printing Office]


40PROTECTION OF ENVIRONMENT62002-07-012002-07-01false60.47bSec. 60.47bPROTECTION OF ENVIRONMENTENVIRONMENTAL PROTECTION AGENCYAIR PROGRAMS (CONTINUED)STANDARDS OF PERFORMANCE FOR NEW STATIONARY SOURCESStandards of Performance for Industrial-Commercial-
Sec. 60.47b  Emission monitoring for sulfur dioxide.

    (a) Except as provided in paragraphs (b) and (f) of this section, 
the owner or operator of an affected facility subject to the sulfur 
dioxide standards under Sec. 60.42b shall install, calibrate, maintain, 
and operate continuous emission monitoring systems (CEMS) for measuring 
sulfur dioxide concentrations and either oxygen (O2) or 
carbon dioxide (CO2) concentrations and shall record the 
output of the systems. The sulfur dioxide and either oxygen or carbon 
dioxide concentrations shall both be monitored at the inlet and outlet 
of the sulfur dioxide control device.
    (b) As an alternative to operating CEMS as required under paragraph 
(a) of this section, an owner or operator may elect to determine the 
average sulfur dioxide emissions and percent reduction by:
    (1) Collecting coal or oil samples in an as-fired condition at the 
inlet to the steam generating unit and analyzing them for sulfur and 
heat content according to Method 19. Method 19 provides procedures for 
converting these measurements into the format to be used in calculating 
the average sulfur dioxide input rate, or
    (2) Measuring sulfur dioxide according to Method 6B at the inlet or 
outlet to the sulfur dioxide control system. An initial stratification 
test is required to verify the adequacy of the Method 6B sampling 
location. The stratification test shall consist of three paired runs of 
a suitable sulfur dioxide and carbon dioxide measurement train operated 
at the candidate location and a second similar train operated according 
to the procedures in section 3.2 and the applicable procedures in 
section 7 of Performance Specification 2. Method 6B, Method 6A, or a 
combination of Methods 6 and 3 or 3B or Methods 6C and 3A are suitable 
measurement techniques. If Method 6B is used for the second train, 
sampling time and timer operation may be adjusted for the stratification 
test as long as an adequate sample volume is collected; however, both 
sampling trains are to be operated similarly. For the location to be 
adequate for Method 6B 24-hour tests, the mean of the absolute 
difference between the three paired runs must be less than 10 percent.
    (3) A daily sulfur dioxide emission rate, ED, shall be 
determined using the procedure described in Method 6A, section 7.6.2 
(Equation 6A-8) and stated in ng/J (lb/million Btu) heat input.
    (4) The mean 30-day emission rate is calculated using the daily 
measured

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values in ng/J (lb/million Btu) for 30 successive steam generating unit 
operating days using equation 19-20 of Method 19.
    (c) The owner or operator of an affected facility shall obtain 
emission data for at least 75 percent of the operating hours in at least 
22 out of 30 successive boiler operating days. If this minimum data 
requirement is not met with a single monitoring system, the owner or 
operator of the affected facility shall supplement the emission data 
with data collected with other monitoring systems as approved by the 
Administrator or the reference methods and procedures as described in 
paragraph (b) of this section.
    (d) The 1-hour average sulfur dioxide emission rates measured by the 
CEMS required by paragraph (a) of this section and required under 
Sec. 60.13(h) is expressed in ng/J or lb/million Btu heat input and is 
used to calculate the average emission rates under Sec. 60.42b. Each 1-
hour average sulfur dioxide emission rate must be based on more than 30 
minutes of steam generating unit operation and include at least 2 data 
points with each representing a 15-minute period. Hourly sulfur dioxide 
emission rates are not calculated if the affected facility is operated 
less than 30 minutes in a 1-hour period and are not counted toward 
determination of a steam generating unit operating day.
    (e) The procedures under Sec. 60.13 shall be followed for 
installation, evaluation, and operation of the CEMS.
    (1) All CEMS shall be operated in accordance with the applicable 
procedures under Performance Specifications 1, 2, and 3 (appendix B).
    (2) Quarterly accuracy determinations and daily calibration drift 
tests shall be performed in accordance with Procedure 1 (appendix F).
    (3) For affected facilities combusting coal or oil, alone or in 
combination with other fuels, the span value of the sulfur dioxide CEMS 
at the inlet to the sulfur dioxide control device is 125 percent of the 
maximum estimated hourly potential sulfur dioxide emissions of the fuel 
combusted, and the span value of the CEMS at the outlet to the sulfur 
dioxide control device is 50 percent of the maximum estimated hourly 
potential sulfur dioxide emissions of the fuel combusted.
    (f) The owner or operator of an affected facility that combusts very 
low sulfur oil is not subject to the emission monitoring requirements of 
this section if the owner or operator obtains fuel receipts as described 
in Sec. 60.49b(r).

[52 FR 47842, Dec. 16, 1987, as amended at 54 FR 51820, Dec. 18, 1989; 
55 FR 5212, Feb. 14, 1990; 55 FR 18876, May 7, 1990]