SAN DIEGO COUNTY AIR POLLUTION CONTROL DISTRICT

RULE 260.48b - EMISSION MONITORING FOR PARTICULATE MATTER AND NITROGEN OXIDES
(Rev. Effective 9-21-93)

(a) The owner or operator of an affected facility subject to the opacity standard under Rule 260.43b shall install, calibrate, maintain and operate a continuous monitoring system for measuring the opacity of emissions discharged to the atmosphere and record the output of the system.

(b) Except as provided in Sections (g), (h) and (i) of this rule, the owner or operator of an affected facility subject to the nitrogen oxides standard of Rule 260.44b shall install, calibrate, maintain, and operate a continuous monitoring system for measuring nitrogen oxides emissions discharged to the atmosphere and record the output of the system. (Rev. Effective 9-21-93)

(c) The continuous monitoring systems required under Section (b) of this rule shall be operated and data recorded during all periods of operation of the affected facility except for continuous monitoring system breakdowns, and repairs. Data is recorded during calibration checks, and zero and span adjustments.

(d) The 1-hour average nitrogen oxides emissions rates measured by the continuous nitrogen oxides monitor required by Section (b) of this rule and required under Rule 260.13(h) shall be expressed in ng/J or lbs/million BTU heat input and shall be used to calculate the average emission rates under Rule 260.44b. The 1-hour averages shall be calculated using the data points required under Rule 260.13(b). At least two data points must be used to calculate each 1-hour average.

(e) The procedures under Rule 260.13 shall be followed for installation, evaluation, and operation of the continuous monitoring systems.

  1. For affected facilities combusting coal, wood, or municipal-type solid waste, the span value for continuous monitoring system for measuring opacity shall be between 60 and 80 percent.
  2. For affected facilities combusting coal, oil, or natural gas, the span value for nitrogen oxides is determined as follows:

 

FUEL

SPAN VALUES FOR NITROGEN OXIDES (ppm)

Natural gas

500

Oil

500

Coal

1,000

Combination

500 (x + y) + 1,000z

 
  1. All span values computed under Subsection (e)(2) of this rule for combusting combinations of regulated fuels are rounded to the nearest 500 ppm.

(f) When nitrogen oxides emission data are not obtained because of continuous monitoring system breakdowns, repairs, calibration checks and zero and span adjustments, emission data will be obtained by using standby monitoring systems, Method 7, Method 7A, or other approved reference methods to provide emission data for a minimum of 75 percent of the operating hours in each steam generating unit operating day, in at least 22 out of 30 successive steam generating unit operating days.

(g) The owner or operator of an affected facility which has a heat input capacity of 73 MW (250 million BTU/hour) or less, and which has an annual capacity factor for residual oil having a nitrogen content of 0.30 weight percent or less, natural gas, distillate oil, or any mixture of these fuels greater than 10 percent (0.10) shall:

  1. Comply with the provisions of Sections (b), (c), (d), (e)(2), (e)(3), and (f) of this rule, or
  2. Monitor steam generating unit operating conditions and predict nitrogen oxides emission rates as specified in a plan submitted pursuant to Rule 260.49b(c).

(h) The owner or operator of an affected facility which is subject to the nitrogen oxides standards of Rule 260.44b(a)(4) is not required to install or operate a continuous monitoring system to measure nitrogen oxides emissions.

(i) The owner or operator of an affected facility described in Rules 260.44b(j) or 260.44b(k) is not required to install or operate a continuous monitoring system for measuring nitrogen oxides emissions.