CALIFORNIA AIR RESOURCES BOARD 

APCD/AQMD RULE EVALUATION FORM -- Page 1

(Electronic Format) 

I. GENERAL INFORMATION

District: Placer County Air Pollution Control District

Rule No(s): Rule 231 Date adopted/Amended/Rescinded: October 9, 1997

Rule Title(s): Rule 231 Industrial, Institutional, Commercial Boilers, Steam Generators, and Process Heaters

Date Submitted to ARB: December 24, 2008

If an Amended Rule, Date Last Amended (or Adopted): October 9, 1997

Is the Rule Intended to be Sent to the U.S. EPA as a SIP Revision? Yes No (If No, do not complete remainder of form)

District Contact: John Finnell Phone Number: (530) 745-2324 E-mail Address: jfinnell@placer.ca.gov

Narrative Summary of New Rule or Rule Changes: New Rule Amended Rule 

This rule implements Federal and State NOx RACT/BARCT requirements for boilers, steam generators and process 

heaters.

This rule amendment removed the language referring to the three previous calendar years in the Section 300, Standards 

as follows:

Revised Standard 301, Annual Heat Input > 90,000 Therms, to be determined based on annual heat input for the year 

instead of any of the three previous years. This changes the standard to be based on the prior year not on the previous 

three years.

Revised Standard 302, Annual Heat Input <90,000 Therms, to be determined based on annual heat input for the 

one prior year instead of each of the three previous years. 

There were no new emission reductions associated with this amendment. 

Pollutant(s) Regulated by the Rule (Check): ROG (NOx) SO2 

 (CO) PM TAC (name): 

II. EFFECT ON EMISSIONS

Complete this section ONLY for rules that, when implemented, will result in quantifiable changes in emissions. Attach reference(s) for emission factor(s) 

and other information. Attach calculation sheet showing how the emission information provided below was determined. 

Net Effect on Emissions: Increase Decrease N/A 

Emission Reduction Commitment in SIP for this Source Category: 0

Inventory Year Used to Calculate Changes in Emissions: 1990 Area Affected: N/A

Future Year Control Profile Estimate (Provide information on as many years as possible): 

N/A
CALIFORNIA AIR RESOURCES BOARD 

APCD/AQMD RULE EVALUATION FORM -- Page 2

(Electronic Format) 

Baseline Inventory in the SIP for the Control Measure: N/A

Emissions Reduction Commitment in the SIP for the Control Measure: N/A

Revised Baseline Inventory (if any): N/A

Revised Emission Reduction Estimate (if developed): N/A

Note that the district’s input to the Rule Evaluation Form will not be used as input to the ARB’s emission forecasting and 

planning. 

III. SOURCES/ATTAINMENT STATUS

District is: Attainment Nonattainment Split 

Approximate Total Number of Small (<100 TPY) Sources Affected by this Amendment: 1

Percent in Nonattainment Area: 100% 

Number of Large (> 100 TPY) Sources Controlled: 0 Percent in Nonattainment Area: N/A% 

Name(s) and Location(s) (city and county) of Large (> 100 TPY) Sources Controlled by Rule (Attach additional sheets as 

necessary): N/A

IV. EMISSION REDUCTION TECHNOLOGY

Does the Rule Include Emission Limits that are Continuous? Yes No 

If Yes, Those Limits are in Section(s) 301 of the Rule. 

Other Methods in the Rule for Achieving Emission Reductions are: Annual tuning is required for units which burn less 

than 90,000 therms.

V. OTHER REQUIREMENTS

The Rule Contains: 

Emission Limits in Section(s): 301 Work Practice Standards in Section(s): 303 and 600

Recordkeeping Requirements in Section(s): 500 Reporting Requirements in Section(s): 503
CALIFORNIA AIR RESOURCES BOARD 

APCD/AQMD RULE EVALUATION FORM -- Page 3

(Electronic Format) 

5/1/2002 

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VI. IMPACT ON AIR QUALITY PLAN

 No Impact Impacts RFP Impacts attainment 

Discussion: This amendment changed the time period from a three year to an annual period used to determine if heat 

input was greater than or less than 90,000 therms. If less than 90,000 therm heat input were burned in the prior year, the 

unit shall be tuned annually.