SAN DIEGO COUNTY AIR POLLUTION CONTROL DISTRICT

RULE 260.45b - COMPLIANCE AND PERFORMANCE TEST METHODS AND PROCEDURES FOR SULFUR DIOXIDE
(Rev. Effective 9-21-93)

(a) The sulfur dioxide emission standards under Rule 260.42b apply at all times.

(b) In conducting the performance tests required under Rule 260.8, the owner or operator shall use the methods and procedures in Appendix A of this Regulation or the method and procedures as specified in this rule, except as provided in Rule 260.8(b). Rule 260.8(f) does not apply to this subpart. The 30-day notice required in Rule 260.8(d) applies only to the initial performance test unless otherwise specified by the Control Officer.

(c) The owner or operator of an affected facility shall conduct performance tests to determine compliance with the percent of potential sulfur dioxide emission rate (% Ps) and the sulfur dioxide emission rate (Es) pursuant to Rule 260.42b following the procedures listed below, except as provided under Section (d) of this rule.

  1. The initial performance test shall be conducted over the first 30 consecutive operating days of the steam generating unit. Compliance with the sulfur dioxide standards shall be determined using one-hour averages where an exceedance averaged over any hour is a violation. The first operating day included in the initial performance test shall be scheduled within 30 days after achieving the maximum production rate at which the affected facility will be operated, but not later than 180 days after initial startup of the facility.
  2. If only coal or only oil is combusted, the following procedures are used:

    (i) The procedures in Method 19 are used to determine the hourly sulfur dioxide emission rate (Eho) and the 30-day average emission rate (Eao). The hourly averages used to compute the 30-day averages are obtained from the continuous emission monitoring system of Rule 260.47b(a) or (b).

    (ii) The percent of potential sulfur dioxide emission rate (% Ps) emitted to the atmosphere is computed using the following formula:
     

        % Ps = 100 (1 - % Rg/100) (1 - % Rf/100)

        where:

        % Rgis the sulfur dioxide removal efficiency of the control device as determined by Method 19, in percent.

        % Rfis the sulfur dioxide removal efficiency of fuel pretreatment as determined by Method 19, in percent.

  3. If coal or oil is combusted with other fuels, the same procedures required in subsection (c)(2) of this rule are used, except as provided in the following:

    (i) Ehoo, the adjusted hourly sulfur dioxide emission rate, is computed using the following formula:

        Ehoo = [Eho - Ew (1 - Xk)]/Xk

        where:

        Ehoois the adjusted hourly sulfur dioxide emission rate, ng/J (lbs/million BTU).

        Ehois the hourly sulfur dioxide emission rate ng/J (lbs/million BTU).

        Ewis the sulfur dioxide concentration in fuels other than coal and oil combusted in the affected facility, as determined by the fuel sampling and analysis procedures in Method 19, ng/J (lbs/million BTU). The value Ew for each fuel lot is used for each hourly average during the time that the lot is being combusted.

        Xkis the fraction of total heat input from fuel combustion derived from coal, oil, or coal and oil, as determined by applicable procedures in Method 19.

    (ii) To compute the percent of potential sulfur dioxide emission rate (% Ps), an adjusted % Rg (% Rgo) is computed from the adjusted Ehoo from Subsection (b)(3)(i) of this rule and an adjusted average sulfur dioxide inlet rate (Eaio) using the following formula:
        % Rgo = 100 (1.0 - Ehoo/Ehio)
    The adjusted hourly sulfur dioxide inlet rate (Ehio) is computed using the following formula:
        Ehio = [Ehi - Ew(1 - Xk)]/Xk

        where:

        Ehiois the adjusted hourly sulfur dioxide inlet rate, ng/J (lbs/million BTU).

        Ehiis the hourly sulfur dioxide inlet rate, ng/J (lbs/million BTU).

  4. The owner or operator of an affected facility subject to Subsection (b)(3) of this rule does not have to measure parameters Ew or Xk if the owner or operator elects to assume that Xk = 1.0. Owners or operators of affected facilities who assume Xk = 1.0 shall:

    (i) Determine % Ps following the procedures in Subsection (c)(2) of this rule, and

    (ii) Sulfur dioxide emissions (Es) are considered to be in compliance with sulfur dioxide emission limits under Rule 260.42b.

  5. The owner or operator of an affected facility that qualifies under the provisions of Rule 260.42b(d) does not have to measure parameters Ew or Xk under Sub-section (b)(3) of this rule if the owner or operator of the affected facility elects to measure sulfur dioxide emission rates of the coal or oil following the fuel sampling and analysis procedures under Method 19.

(d) Except as provided in Section (j) of this rule, the owner or operator of an affected facility that combusts only low sulfur oil, has an annual capacity factor for oil of 10 percent (0.10) or less, and is subject to a federally enforceable requirement limiting operation of the affected facility to an annual capacity factor for oil of 10 percent (0.10) or less shall: (Rev. Effective 9-21-93)

  1. Conduct the initial performance test over 24 consecutive steam generating unit operating hours at full load;
  2. Determine compliance with the standards after the initial performance test based on the arithmetic average of the hourly emissions data during each steam generating unit operating day if a continuous emission measurement system (CEMS) is used, or based on a daily average if Method 6B or fuel sampling and analysis procedures under Method 19 are used.

(e) The owner or operator of an affected facility subject to Rule 260.42b(d)(1) shall demonstrate the maximum design capacity of the steam generating unit by operating the facility at maximum capacity for 24-hours. This demonstration will be made during the initial performance test and a subsequent demonstration may be requested at any other time. If the 24-hour average firing rate for the affected facility is less than the maximum design capacity provided by the manufacturer of the affected facility, the 24-hour average firing rate shall be used to determine the capacity utilization rate for the affected facility, otherwise the maximum design capacity provided by the manufacturer is used.

(f) For the initial performance test required under Rule 260.8, compliance with the sulfur dioxide emission limits and percent reduction requirements under Rule 260.42b is based on the average emission rates and the average percent reduction for sulfur dioxide for the first 30 consecutive steam generating unit operating days, except as provided under Section (d) of this rule. The initial performance test is the only test for which at least 30 days prior notice is required unless otherwise specified by the Control Officer. The initial performance test is to be scheduled so that the first steam generating unit operating day is completed within 30 days after achieving the maximum production rate at which the affected facility will be operated, but not later than 180 days after initial startup of the facility. The boiler load during the 30-day period does not have to be the maximum design load, but must be representative of future operating conditions and include at least one 24-hour period at full load.

(g) After the initial performance test required under Rule 260.8, compliance with the sulfur dioxide emission limits and percent reduction requirements under Rule 260.42b is based on the average emission rates and the average percent reduction for sulfur dioxide for 30 successive steam generating unit operating days, except as provided under Section (d). A separate performance test is completed at the end of each steam generating unit operating day after the initial performance test, and an hourly average emission rate and percent reduction for sulfur dioxide are calculated to show compliance with the standard. An exceedance of the standard averaged over any given hour is a violation.

(h) Except as provided under Section (i) of this rule, the owner or operator of an affected facility shall use all valid sulfur dioxide emissions data in calculating % Ps and Eho under Section (c) of this rule whether or not the minimum emissions data requirements under Rule 260.46b are achieved. All valid emission data, including valid sulfur dioxides emission data collected during periods of startup, shutdown and malfunction, shall be used in calculating % Psand Eho pursuant to Section (c) of this rule.

(i) During periods of malfunction or maintenance of the sulfur dioxide control systems when oil is combusted as provided under Rule 260.42b(i), emission data are not used to calculate % Ps or Es under Rule 260.42b(a), (b), or (c), however the emissions data are used to determine compliance with the emission limit under Rule 260.42b(i).

(j) The owner or operator of an affected facility that combusts low sulfur oil is not subject to the compliance and performance testing requirements of this rule if the owner or operator obtains fuel receipts as described in Rule 260.49b(r). (Effective 9-21-93)