CALIFORNIA AIR RESOURCES BOARD 

APCD/AQMD RULE EVALUATION FORM -- Page 1

(Electronic Format) 

I. GENERAL INFORMATION 

District: Northern Sonoma County Air Pollution Control District 

Rule No(s): 130, 221 Date adopted/Amended/Rescinded: 12/14/10 

Rule Title(s): 130: Definitions; 221: Federal Permitting for Greenhouse Gas Emissions 

Date Submitted to ARB: February 10, 2011 

If an Amended Rule, Date Last Amended (or Adopted): Rule 130: amended 7/25/95 

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: Barbara Lee Phone Number: 707-433-5911 E-mail Address: blee1@sonoma-county.org 

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

Adopted Rule 221: Federal Permitting for Greenhouse Gas Emissions. The District was required to adopt this rule 

based upon the EPA's recently adopted Greenhouse Gas Tailoring Rule. The rule phases in permitting 

requirements for stationary sources of greenhouse gases; it applies to large sources of greenhouse gas

emissions. The only known such sources within the district are Geysers Power Company and Northern California 

Power Authority. Rule 221 will require sources to evaluate greenhouse gas emissions during the permitting 

process. District Rule 130 (Definitions) was revised in order to be consistent with the new Rule 221. Along with 

changes to Rule 130 for consistency, the District also changed Rule 130 by implementing new and revised 

significant emissions thresholds and increments (pertaining to PM 2.5 and municipal waste landfills and 

incinerators) in order to match EPA's thresholds and increments set forth since the last modification to the 

District's program. This change is not anticipated to affect operations at sources within the District. 

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: 

Inventory Year Used to Calculate Changes in Emissions: Area Affected: 

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

 
CALIFORNIA AIR RESOURCES BOARD 

APCD/AQMD RULE EVALUATION FORM -- Page 2

(Electronic Format) 

Baseline Inventory in the SIP for the Control Measure: 

Emissions Reduction Commitment in the SIP for the Control Measure: 

Revised Baseline Inventory (if any): 

Revised Emission Reduction Estimate (if developed): 

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: 

Percent in Nonattainment Area: % 

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

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

necessary): 

IV. EMISSION REDUCTION TECHNOLOGY 

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

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

Other Methods in the Rule for Achieving Emission Reductions are: 

V. OTHER REQUIREMENTS 

The Rule Contains: 

Emission Limits in Section(s): Work Practice Standards in Section(s): 

Recordkeeping Requirements in Section(s): Reporting Requirements in Section(s): 
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: