# PROPOSED November 14, 2013

4308 - 1 Proposed Amendments to Rule 4308 RULE 4308 BOILERS, STEAM GENERATORS, AND PROCESS HE ATERS – 0.075

MMBtu/hr to less than 2.0 MMBtu/hr (Adopted October 20, 2005, Amended December 17, 2009, Amended [ rule adoption date ])

1.0 Purpose

The purpose of this rule is to limit emissions of oxides of nitrogen (NOx) and carbon monoxide (CO) from boilers, steam generators, proce ss heaters and water heaters.

2.0 Applicability

This rule applies to any person who supplies, sell s, offers for sale, installs, or solicits the installation of any boiler, steam generator, proces s heater or water heater with a rated heat input capacity greater than or equal to 75,000 Brit ish thermal units per hour and less than 2,000,000 British thermal units per hour.

3.0 Definitions

3.1 APCO: the Air Pollution Control Officer of the San Joaquin Valley Unified Air Pollution Control District, or any person authorize d to act on behalf of the APCO.

3.2 Boiler, Steam Generator or Water Heater: any external combustion equipment

fired with any liquid or gaseous fuel to produce ho t water or steam.

3.3 British Thermal Unit (Btu): the amount of heat req uired to raise the temperature of one pound of water from 59 o F to 60 o F at one atmosphere.

3.4 California Public Utility Commission (PUC) Qua lity Natural Gas: any gaseous fuel, gas-containing fuel where the sulfur content is no more than one-fourth (0.25) grain of hydrogen sulfide per one hundred (100) sta ndard cubic feet and no more than five (5) grains of total sulfur per one hundre d (100) standard cubic feet. PUC quality natural gas also means high methane gas of at least 80% methane by

volume.

3.4 3.5 Certified Retrofit Kit: any burner, ancill ary controls or blowers that have been demonstrated to comply with the provisions of this rule in Section 6.1, on a retrofit basis, on a particular model of unit.

3.5 3.6 District: as defined in Rule 1020 (Defini tions).

3.6 EPA: United States Environmental Protection A gency.

3.7 Heat Output: the enthalpy of the working flui d output of the unit.

# PROPOSED November 14, 2013

4308 - 2 Proposed Amendments to Rule 4308 3.7 3.8 Higher Heating Value (hhv): the total heat liberated per mass of fuel burned (Btu per pound), when fuel and dry air at standard condi tions undergo complete combustion and all resulting products are brought t o their standard states at

standard conditions.

3.8 Hot Water Pressure Washer: for purposes of thi s rule, high-pressure cleaning machine in which the hot water discharge line (spra y nozzle) is hand supported and intended for commercial and industrial applications

.

3.9 Humidifier: a device or system that uses an ai r stream heated by a direct contact combustion process in combination with a water spra y to produce warm air of high humidity in order to maintain or increase the moist ure content of the material being processed or conveyed by the air stream. For the pu rpose of this rule, such a device is not considered a boiler, steam generator or process heater.

3.10 Instantaneous Water Heater: a water heater wi th a rated heat input capacity per hour that heats water only when it flows through a heat exchanger.

3.11 Manufactured Home: as defined in 42 United States Code Section 5402 an d California Health and Safety Code Section 18007.

3.12 NOx Emissions: the sum of oxides of nitrogen (NOx) in the flue gas, collectively expressed as nitrogen dioxide.

3.13 Process Heater: any combustion equipment fire d on gaseous or liquid fuel, which transfers heat from combustion gases to water or pr ocess streams. Process heaters exclude kilns or ovens used for drying, baking, coo king, calcining, heat treating, or vitrifying.

3.14 PUC Quality Natural Gas: California Public Ut ility Commission Quality Natural Gas is any gaseous fuel, gas-containing fuel where the sulfur content is no more than one-fourth (0.25) grain of hydrogen sulfide pe r one hundred (100) standard cubic feet and no more than five (5) grains of tota l sulfur per one hundred (100) standard cubic feet. PUC quality natural gas also means high methane gas of at least 80% methane by volume.

3.15 3.14 Rated Heat Input: the heat input capacit y, usually expressed as million Btu per hour (MMBtu/hr), usually specified on the nameplate of the unit. If the unit has been physically modified such that its maximum heat input differs from what is specified on the nameplate, the modified maximum he at input shall be considered as the rated heat input and made enforceable by Per mit to Operate or Registration

Certificate.

# PROPOSED November 14, 2013

4308 - 3 Proposed Amendments to Rule 4308 3.16 3.15 Recreational Vehicle: any vehicle used f or recreational purposes and designed to include a water heater and is required to be lic ensed to be driven or moved on the highways of California.

3.17 SCAQMD: South Coast Air Quality Management Di strict.

3.18 3.16 Unit: any boiler, process heater, or wat er heater as defined in this rule.

4.0 Exemptions

The provisions of this rule shall not apply to:

4.1 Units installed in manufactured homes, and;

4.2 Units installed in recreational vehicles.; and

4.3 Hot water pressure washers.

5.0 Requirements

5.1 Until December 31, 20142010, a person shall not sup ply, sell, offer for sale, install or solicit the installation of any boiler, process heater or water heater unless it has been certified pursuant to Section 6. 1 and complies with Table 1, Tier 1 NOx limits and CO limits specified in Sectio n 5.3.

5.2 On, and after January 1, 2015,2011 a person sha ll not supply, sell, offer for sale, install or solicit the installation of any bo iler, process heater or water heater unless it has been certified pursuant to Sec tion 6.1 and complies with Table 21, Tier 2 NOx limits and CO limits specified in Section 5.3.

5.3 Units with a rated heat input capacity of 400,0 00 Btu per hour 0.4 MMBtu/hr to less than 2,000,000 Btu per hour 2.0 MMBtu/hr shall not exceed the CO limit of 400 ppm at 3% stack gas oxygen by volume on a dr y basis.

# PROPOSED November 14, 2013

4308 - 4 Proposed Amendments to Rule 4308 Table 1 Emissions Limits (Effective until December 31, 2014 ) Type and Size of Unit,

in MMBtu/hr NOx Limit

( at 3% stack gas oxygen by volume on a dry basis )

All Fuels PUC Gas Non PUC Gas or Liquid

Tier 1

lb/MMBtu of heat input (ppmv) Tier 2

lb/MMBtu of heat input (ppmv) Tier 2

lb/MMBtu of heat input (ppmv) Units greater than or equal to 0.075 but less than or equal to 0.4, except as specified below 0.093 (77) 0.024 (20) 0.093 (77)

Units greater than 0.4 but less than 2.0, except as specified below 0.036 (30) 0.024 (20) 0.036 (30)

Instantaneous water heaters and pool heaters greater than or equal to 0.075 but less than or equal to 0.4 0.093 (77) 0.068 (55) 0.093 (77)

Instantaneous water heaters and pool heaters greater than 0.4 but less than

2.0 0.036 (30) 0.024 (20) 0.036 (30)

Table 2 Emission Limits (Effective on and after January 1, 2015)
Type and Size of Unit,

in MMBtu/hr NOx Limit

( at 3% stack gas oxygen by volume on a dry basis )

PUC Gas Non PUC Gas or Liquid

lb/MMBtu of heat input (ppmv) lb/MMBtu of heat input (ppmv)

Units greater than or equal to 0.075 but less than or equal to 0.4, except as specified below 0.024 (20) 0.093 (77)

Units greater than 0.4 but less than 2.0, except as specified below 0.024 (20) 0.036 (30)

Instantaneous water heaters greater than or equal to 0.075 but less than or equal to 0.4 0.024 (20) 0.093 (77)

Instantaneous water heaters greater than

0.4 but less than 2.0 0.024 (20) 0.036 (30)

Pool heaters greater than or equal to 0.075 but less than or equal to 0.4 0.068 (55) 0.093 (77)

Pool heaters greater than 0.4 but less than 2.0 0.024 (20) 0.036 (30)

# PROPOSED November 14, 2013

4308 - 5 Proposed Amendments to Rule 4308 6.0 Administrative Requirements

6.1 Methods of Emission Certification

6.1.1 Certified emissions levels shall be demonst rated by an emission certification

approved under either of the following:

6.1.1 6.1.1.1 The District’s certification program as described in Section 6.2 and

6.3 of this rule.

6.1.2 6.1.1.2 The South Coast Air Quality Managemen t District (SCAQMD)

Certification List for Rule 1146.2. Units certified pursuant to Rule 1146.2 must comply with applicable emission limits pursuan t to District Rule 4308 Table 1 and the compliance schedule in Section 7.0.

6.1.3 6.1.1.3 Other emission certification programs approved by the EPA and

APCO.

6.2 District Certification Program Specifications – Uni t Manufacturer

6.2.1 For each new unit or retrofit kit to be certi fied, the manufacturer shall obtain from an independent testing laboratory, a ce rtification source test verifying compliance with the emission limits in Se ction 5.0. The results should shall be submitted with the compliance repor t information in

Section 6.3.

6.2.2 Source tests shall be conducted on a randomly selected unit no more than 90 days prior to the date of proposed certification of the model by the

District.

6.2.3 Tests shall be conducted and reports shall be prepared according to District Rule 1081 (Source Sampling) and, for natur al gas-fired units, the “Nitrogen Oxides Emissions Compliance Testing for N atural Gas-Fired Water Heaters and Small Boilers,” Protocol, South C oast Air Quality Management District SCAQMD, Source Testing and Engi neering Branch, Applied Science and Technology.

6.2.4 District certification for a manufacturer shall be valid for three years

from the date of certification.

6.2.5 The District shall publish and maintain a lis t of certified emissions for

the tested unit.

# PROPOSED November 14, 2013

4308 - 6 Proposed Amendments to Rule 4308 6.3 Compliance Report

The compliance report shall be submitted to the Dis trict and shall contain the following information:

6.3.1. Name and address of manufacturer,

6.3.2 Brand name,

6.3.3 Model number, as it appears on the permanent nameplate, and

6.3.4 Description of the model unit or retrofit kit being certified, including burner type and rated heat input capacity

.

6.3.5 A report on the certification test specified in Section 6.2.3.

6.3.6 A signed and dated statement attesting, under penalty of perjury, to the accuracy of all statements and information i n the compliance report.

6.4 Identification of Compliant Units

The manufacturer subject to Section 6.2 shall disp lay the model number and the certification status, as determined in Section 6.2 of this rule, of an applicable unit or retrofit kit on the permanent nameplate of the unit or kit. If packaging obscures the permanent nameplate, the model number and certification status shall also appear on the packaging.

7.0 Compliance Schedule

7.1 Until December 31, 2010, a person shall comply with the requirements of Section

5.1 and Section 5.3

7.2 On and after January 1, 2011, a person shall co mply with the requirements of

Section 5.2 and Section 5.3.