CALIFORNIA AIR RESOURCES BOARD 

APCD/AQMD RULE EVALUATION FORM -- Page 1

(Electronic Format) 

I. GENERAL INFORMATION 

District: Sacramento Metropolitan Air Quality Management District 

Rule No(s): 421 Date adopted/Amended/Rescinded: Amended on September 24, 2009 

Rule Title(s): Mandatory Episodic Curtailment of Wood and Other Solid Fuel Burning 

Date Submitted to ARB: June 14, 2012 

If an Amended Rule, Date Last Amended (or Adopted): Adopted on October 25, 2007 

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: Kevin J. Williams Phone Number: 916-874-4851 E-mail Address: kjwilliams@airquality.org 

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

The rule curtails wood and other solid fuel burning in fireplaces, wood inserts, wood stoves, and pellet stoves on 

days when air quality is forecast to be unhealthy. Limited exmeptions are provided for sole source of heat, 

financial hardship, cooking, religious activities and gaseous fueled devices. 

The rule amendments set lower thresholds for PM2.5 concentrations used to declare No Burn days. 

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: N/A 

Inventory Year Used to Calculate Changes in Emissions: 2005 Area Affected: Sacramento County 

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: 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: 276,000 wood burning appliances

Percent in Nonattainment Area: 100% 

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: Section 301 of the rule prohibits burning of wood on 

days where the Air Pollution Control Officer has determined that ambient PM2.5 concentrations may exceed specified 

thresholds. There is also a lower threshold at which the Air Pollution Control Oficer may declare a voluntary curtailment 

of wood burning. 

V. OTHER REQUIREMENTS 

The Rule Contains: 

Emission Limits in Section(s): 301 Work Practice Standards in Section(s): N/A 

Recordkeeping Requirements in Section(s): N/A Reporting Requirements in Section(s): 401-403 
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: Impacts attainment by reducing the emissions of particulate matter on days that have a high probability of 

exceeding ambient air quality standards.