AIR RESOURCES BOARD

VENTURA COUNTY APCD RULE EVALUATION FORM - Page 1

I. GENERAL INFORMATION

District: Ventura County APCD Rule No.: 74.15.1 Date Amended: June 23, 2015

Rule Title: Boilers, Steam Generators, and Process Heaters

Date Submitted to ARB: July 14, 2015 If an Amended Rule, Date Last Amended: Sept 11, 2012

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

District Contact: Stan Cowen Phone No.: 805/645-1408

Narrative Summary of Rule Changes: (X) Amended Rule : Amendments to Rule 74.15.1 will reduce NOx emissions from new or 

replacement boilers, steam generators, and process heaters having a rated heat input capacity between 2 and 5 Million BTU per hour. New or 

replaced boilers will be subject to source tests at least every four years, while annual screenings will continue. The applicability of the rule 

has been extended to other gaseous fuels besides natural gas, and a new exemption from the 30 ppm existing NOx limit has been adopted for 

portable oilfield dewaxing operations. 

Pollutant(s) Regulated by the Rule (Circle): ROG NOx SO2 PM10 CO TAC

II. EFFECT ON EMISSIONS

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

information. Attach calculation sheet showing how the emissions information provided below was determined. See staff report Appendix A for emission calculations.

Net Effect on Emissions: ( ) Increase(X) Decrease ( ) N/A No impact on emissions. See attached staff report for emission reduction 

calculations. The net effect of the amended rule is to reduce NOx emissions by 9.32 tons per year.

II. EFFECT ON EMISSIONS

Emission Reduction Commitment in SIP (Control Measure) for this source category: 2012 Triennial Assessment: New control measure with 

emissions reductions to be determined. 

Inventory Year Used to Calculate Changes in Emissions: 2013 Area Affected:County

Future Year Control Profile Estimate:

Year

Tons/year 

Reductions 

2012 Baseline 

Tons/year 

Subject to Rule

Control 

Level

Percent 

Control

Control 

Level

Control Factor

2025 9.32 / 16.04 = 0.58 * 100 = 58% 1.00 - 0.58 = 0.42
AIR RESOURCES BOARD

VENTURA COUNTY APCD RULE EVALUATION FORM - Page 2

III. SOURCES/ATTAINMENT STATUS

District is: ( ) Attainment(X) Nonattainment ( ) Split

Approximate Total Number of Small (<100 TPY) Sources Controlled by Rule: 66

Percent in Nonattainment Area: 100 %

Number of Large (>100 TPY) Sources Controlled: None Percent in Nonattainment Area: Not Applicable

IV. EMISSION REDUCTION TECHNOLOGY

Do the Rules Include Emission Limits that are Continuous? Yes.

V. OTHER REQUIREMENTS

RULE 74.15.1 (Boilers, Steam Generators, and Process Heaters) Requirements include:

Emission Limits: Section B

Testing Requirements: Section B

Recordkeeping: Section D

Test Methods: Section E

Exemptions: Section C

Enforcement Procedures Section F

VI. IMPACT ON AIR QUALITY PLAN

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

Discussion: Amendments to Rule 74.15.1 will reduce NOx emissions for Ventura County’s efforts toward achieving attainment of 

the ozone standard. Therefore, RFP will be furthered by amendments to Rule 74.15.1.