Imperial County Air Pollution Control District Rule 400.2

400.2

- 1 RULE 400.2 BOILERS, PROCESS HEATERS AND STEAM GENERATORS

(Adopted 02/23/2010 )

A. A pplicability

A.1 This rule limits emissions of oxides of nitrogen (NOx) from Boilers, Process Heaters, or Steam Generators.

A.2 This rule shall apply to any new or existing Process Heaters, Boilers or Steam Generators with a heat input rating of 5 million British Thermal Units (Btu) per hour or more, unless exempted pursuant to Section D of

this rule.

A.3 Boilers, Process Heaters and Steam Generators that are subject to the provisions of this rule shall not be subject to Rule 400.

B. D efinitions

Terms applicable to thi s rule are defined in Rule 101

- Definitions and incorpo rated

them to ICAPCD Rule 101

– Definitions.

C. R equirements

C.1 All Boilers, Process Heaters and Steam Generators unless exempted pursuant to Sections C.3 or C4, shall not emit NOx in excess of the following:

C.1.a 30 parts per million by volume (ppmv) or 0.036 pounds per million BTU of heat input when operated on gaseous fuels.

C.1.b 40 ppmv or 0.052 pounds per million BTU of heat input when operated on liquid fuels.

C.1.c The heat

- input weighted average of the limits specified in C.1.a and C.1.b, when operated on combinations of gas and liquid fuels.

Where: G = annual heat input from gaseous fuel

L = annual heat input from liquid fuel

C.2 All ppmv emission limits are referenced at dry stack

- gas conditions and 3.0% by volume stack

- gas oxygen as an hourly average. Weighted Average Limit = (NOx limit for gaseous fuel x G) + (NOx limit for liquid fuel x L)

G + LImperial County Air Pollution Control District Rule 400.2

400.2

- 2 C.3 All Boilers, Process Heaters, and Steam Generators, with an Annual Capacity Factor (ACF) less than or equal to 30 %, shall not emit NOx in excess of the following:

C.4 Biomass boilers or process heaters shall not emit NOx in excess of the following:

C.4.a An exhaust concentration of 120 ppmv corrected to 12 percent by volume stack gas carbon dioxide (CO 2 ) on a three

- hour average dry
basis, or

C.4.b NOx emissions shall be reduced minimum 80 percent of the uncontrolled NOx emission concentration in the exhaust gas stream. A corresponding controlled limit shall be established in the Authority to Construct/Permit to Operate condition(s) for the purpose of demonstrating continuous compliance with the 80 percent emission reduction.

D. E xemptions

D.1 The provisions of this rule shall not apply to the followi ng:

D.1.a Waste Heat Recovery Boilers that are used to recover heat from the exhaust of Stationary Gas Turbines or Internal Combustion Engines.

D.1.b Furnaces, Kilns, and any combustion equipment where the material being heated is in direct contact with the products of combustion.

D.1.c Thermal Oxidizers and associated waste heat recovery equipment.

D.1.d Boilers, Process Heaters and Steam Generators used exclusively in connection with a structure that is designed for and used exclusively as a dwelling for not more than four f amilies.

D.1.e Coal fired units, installed or erected prior to December 31, 2009.

D.2 Boilers, Process Heaters, or Steam Generators, during Startup, Shutdown or a change in load, when bringing the combustion process up to operating levels, may not exceed twelve hours (12) for Boilers and

ACFcu ≤ 30% ppmv

Gaseous Fuel 70

Liquid Fuel 70Imperial County Air Pollution Control District Rule 400.2

400.2

- 3 Process Heaters of more than 40 MM Btu per hour or six (6) hours per Boilers and Process Heaters of equal to or less than 40 MM Btu per hour, or as specified on the permit to operate.

D.3 Section C.1.b shall not apply to Boilers while forced to burn nongaseous fuel during times of natural gas curtailment. This exemption shall not exceed 168 cumulative hours of operation per calendar year excluding equipment testing time not exceeding 24 hours per calendar year.

E. Monitoring and Rec ordkeeping Requirements

E.1 The owner or operator of Boilers, Process Heaters or Steam Generators with a continuous emission monitoring sys tem (CEMS) which has been installed to measure NOx emissions pursuant to any federal regulation shall certify, calibrat e and maintain the CEMS in accordance with applicable federal regulations including the reporting requirements of Sections 60.7(c), 60.7(d), and 60.13 of Title 40, Code of Federal Regulations Part 60 (40 CFR 60), performance specifications of Appendix B, q uality assurance procedures of Appendix F, and a protocol approved in writing by the Air Pollution Control Officer (APCO).

E.2 The owner or operator of Boilers, Process Heaters or Steam Generators subject to this rule shall maintain an operating log and recor d actual times and duration of all Startups, Shutdowns and Fuel Changes, and the type and quantity of each fuel used.

E.3 For the purposes of a compliance determination based on CEMS data, the averaging period to calculate NOx emissions concentration shall be one
clock hour.

E.4 For the purpose of determine compliance with Section C.4.b to evaluate percentage NOx emission reductions, the owner or operator has the option to run a one

- time uncontrolled NOx emission source testing and

use these results as reference for future annual compliance testing

determination.

F. Test Methods

F.1 Compliance with the NOx emission limits in Section C shall be determined using United States Environmental Protection Agency (U.S. EPA) Method 7, 7A, 7C, 7E, California Air Resources Board (CARB) Method 100, or any other applicable U.S. EPA approved test method.Imperial County Air Pollution Control District Rule 400.2

400.2

- 4 G. Source Test Requirements

G.1 Any required source testing shall be performed at no less than 80% of the power rating. If an owner or operator of a Boilers, Process Heaters or

Steam Generators demonstrates to the satisfaction of the APCO that the equipment cannot operat e at these conditions, then emissions sources testing shall be performed at the highest achievable continuous power rating.

G.2 Boilers, Process Heaters or Steam Generators subject to the requirements of Section C shall demonstrate compliance through emissio n compliance testing not less than once every 12 months. All emission rates shall be based on an hourly average. Frequency of compliance testing may be extended under the following:

G.2.a The frequency of compliance testing may be extended to not less

than ev ery 36 months for Boilers, Process Heaters, or Steam Generators which operate less than 100 hours per a 12 month period (as demonstrated by operational logs) and which emit less than 5 tons of NOx per a 12 month period.

G.2.b The frequency of compliance testing may be extended to not less than every five (5) years for secondary fuel testing for Boilers, Process Heaters, or Steam Generators which operate less than 100 hours per a 12 month period operating secondary fuel (as demonstrated by operational logs) and w hich emit less than 5 tons of NOx per a 12 month period operating secondary fuel. This period may be extended if a source can prove no secondary fuel has been

fired.

G.3 Test reports shall include the operational characteristics recommended by

the manufacture r to ensure compliance with the applicable emission limits of this rule for Boilers, Process Heaters and Steam Generators and all

add

- on NOx control systems.

G.4 For the purposes of a compliance determination based on source testing,

the NOx emissions concentration shall be calculated as an average of

three test runs.

G.5 At least 30 days prior to the scheduled source test date, the owner or operator of a unit subject to this rule shall submit a source test plan to the APCO. At least seven (7) d ays prior to the source test, the owner or operator shall notify the APCO of the exact date and time of the source

test. A final source test result shall be submitted to the APCO within 60 days following the actual source test date.Imperial County Air Pollution Control District Rule 400.2

400.2

- 5 H. Records Retention

H.1 The owner or operator of Boilers, Process Heaters and Steam Generators subject to this rule shall maintain all records required by this rule for a minimum of two (2) calendar years. Title V facilities shall maintain these records for five (5) calendar years. These records shall be maintained on the premises and made available to the District upon request.

I. Compliance Schedule

I.1 The owner or operator of Boilers, Process Heaters and Steam Generators subject to the requirements of this rule which are not in comp liance with the thresholds pursuant to Section C, may be granted an extension for compliance provided the following criteria is met:

I.1.a On or before June 30, 2010, an owner or operator shall submit for approval by the APCO, an Authority to Construct (ATC)/Pe rmit to Operate (PTO) application amendment. The application shall include the following supplemental information:

I.1.a.1 Permit to Operate number.

I.1.a.2 Fuel Type.

I.1.a.3 Annual fuel consumption (BTU/yr).

I.1.a.4 Current emission level, including method used to

determine emission level, and

I.1.a.5 Plan of actions, including a schedule of increments of

progress, which will be taken to satisfy the requirements of Section C and the compliance schedule in Section I.1.b, and

I.1.a.6 Any other information the ICAPCD deems necessary

for the c ompletion of the application.

I.1.b Any Boilers, Process Heaters, and Steam Generators not in compliance with the thresholds in Section C shall demonstrate full compliance with all applicable standards and requirements of this
rule no later than June 30, 20 11.

I.2 Any person installing a new unit shall comply with all applicable provisions of this rule upon initial installation and Startup.