SAN DIEGO COUNTY AIR POLLUTION CONTROL DISTRICT
RULE 260.47b - EMISSION MONITORING FOR SULFUR DIOXIDE
(Effective 3-14-89; Rev. Effective 9-21-93)
(a) Except as provided in Sections (b) and (f) of this rule, the owner or operator of an affected facility subject to the sulfur dioxide standards under Rule 260.42b shall install, calibrate, maintain, and operate continuous emission monitoring system (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. (Rev. Effective 9-21-93)
(b) As an alternative to operating CEMS as required under Section (a) of this rule, an owner or operator may elect to determine the average sulfur dioxide emissions and percent reduction by: (Rev. Effective 9-21-93)
(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 Section (b) of this rule.
(d) The 1-hour average sulfur dioxide emission rates measured by the CEMS required by Section (a) of this rule and required under Rule 260.13(h) is expressed in ng/J or lbs/million BTU heat input and is used to calculate the average emission rates under Rule 260.42b. 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 Rule 260.13 shall be followed for installation, evaluation, and operation of the CEMS.
(f) The owner or operator of an affected facility that combusts low sulfur oil is not subject to the emission monitoring requirements of this rule if the owner or operator obtains fuel receipts as described in Rule 260.49b(r). (Effective 9-21-93)