CALIFORNIA AIR RESOURCES BOARD

APCD/AQMD RULE EVALUATION FORM – Page 1

(Electronic Format)

I. GENERAL INFORMATION

District: South Coast Air Quality Management District

Rule No(s): 1146.1 Date adopted/Amended/Rescinded: November 1, 2013

Rule Title(s): 1146.1 - Emissions of Oxides of Nitrogen from Small Industrial, Institutional, and Commercial 

Boilers, Steam Generators, and Process Heaters

Date Submitted to ARB: December 26, 2013

If an Amended Rule, Date Last Amended (or Adopted): September 5, 2008

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: Joe Cassmassi Phone Number: 909-396-3155 E-mail Address: jcassmassi@aqmd.gov

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

Amended Rule 1146.1 addressed a SIP approvability issue related to rule enforceability raised by U.S. EPA. As 

requested by U.S. EPA, the amended rule clarifies that source test results showing emissions in excess of rule 

limits are considered a rule violation. The amended rule allows diagnostic emission checks for boiler maintenance 

purposes. None of the changes affect rule emission limits or will result in any adverse environmental, 

socioeconomic, or cost impacts. Also included in the amendment were various rule clarifications

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:

The emissions reduction commitment by MCS-01 Facility Modernization was partially implemented by the 

September 5, 2008 Rule 1146 amendment. There were no emission reductions associated with this 

amendment.

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

Area Affected: SCAQMD
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: 1,072

Percent in Nonattainment Area: NA

Number of Large (> 100 TPY) Sources Controlled: N/A 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?1

 Yes No

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

N/A.

V. OTHER REQUIREMENTS

The Rule Contains:

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

Recordkeeping Requirements in Section(s)2: (d) Reporting Requirements in Section(s): (c), (d), and (e) 

1 There were no new emission limits submitted as part of this rule amendment. 2 The previously mentioned SIP approvability issue was addressed in Section (d).

 
CALIFORNIA AIR RESOURCES BOARD

APCD/AQMD RULE EVALUATION FORM - Page 3

(Electronic Format)

VI. IMPACT ON AIR QUALITY PLAN

No Impact Impacts RFP Impacts attainment

Discussion: This amendment of Rule 1146.1 will reduce emissions of NOx to help achieve compliance 

with ambient air quality standards for ozone and particulate matter.

5/1/2002