CALIFORNIA AIR RESOURCES BOARD

APCD/AQMD RULE EVALUATION FORM – Page 1

(Electronic Format)

I. GENERAL INFORMATION

District: Yolo-Solano Air Quality Management District 

Rule No(s): 2.3, 2,11, 2,12 Date Adopted/Amended/Rescinded: January 13, 2010 

Title(s): Ringelmann Chart, Particulate Matter Concentration, Specific Contaminants 

Date Submitted to ARB: January 21, 2010 

If Amended Rule(s), Date Last Amended or Adopted: Rule 2,3 adopted January 21, 1972, Rule 2.11 adopted June 19,

1974, Rule 2.12 adopted January 21, 1972 

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

form)

District Contact: Susan K. McLaughlin Phone Number: 530-757-3667 e-mail Address: SMcLaughlin@ysaqmd.org 

Narrative Summary of New Rule or Rule Changes: New Rule ( ) Amended Rule (X) 

The Yolo-Solano AQMD committed to making the changes to these rules during a July 2005 public hearing required by

Senate Bill (SB) 656 as measures for the reduction of particulate matter emissions. Rule 2.3, Ringelmann Chart is

amended to reduce the acceptable level of visible emissions from that which is equal to No. 2 on the Ringelmann Chart

(40% opacity), to that which is equal to No. 1 (20% opacity) on the Ringelmann Chart. The exemptions previously

contained in Rules 2.4, Exemptions and Rule 2.7, W et Plumes have been added to Rule 2.3 and these two rules have

been rescinded. Rule 2.11, Particulate Matter Concentration and Rule 2.12, Specific Contaminants contain limits on the

concentration of particulate matter emissions, specifically from combustion sources in the case of the latter. These limits

have been lowered from 0.3 grains per cubic foot of gas to 0.1 grains per cubic foot. 

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

CO ( ) PM (X) 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 (X) Split ( )

Approximate Total Number of Small (<100 TPY) Sources Affected by this Amendment: 1645 

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): 

IV. EMISSION REDUCTION TECHNOLOGY

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

If Yes, Those Limits are in Section 301 of the Rules.

Other Methods in the Rule for Achieving Emission Reductions are: The rules are applicable to a wide variety of sources

and methods of compliance may vary greatly between different source types so no specific methods of achieving

emissions reductions are listed in the rules. 

V. OTHER REQUIREMENTS

The Rule Contains:

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

Recordkeeping Requirements in Section(s): N/A Reporting Requirements in Section(s): N/A 
CALIFORNIA AIR RESOURCES BOARD

APCD/AQMD RULE EVALUATION FORM - Page 3

(Electronic Format)

VI. IMPACT ON AIR QUALITY PLAN

No Impact (X) Impacts RFP ( ) Impacts attainment ( )

Discussion: