Bay Area Air Quality Management District July 30, 2008 9-7-1 

### REGULATION 9 INORGANIC GASEOUS POLLUTANTS RULE 7 NITROGEN OXIDES AND CARBON MONO XIDE FROM INDUSTRIAL, INSTITUTIONAL, AND COMMERCIAL BOILERS, STEAM GENERATORS, AND PROCESS HEATERS

INDEX

9-7-100 GENERAL

9-7-101 Description 9-7-110 Exemptions 9-7-111 Limited Exemption, Low Fuel Usage – Section 9-7-301 9-7-112 Limited Exemption, Low Fuel Usage 9-7-113 Limited Exemption, Natu ral Gas Curtailment and Testing 9-7-114 Limited Exemption, Tune-up 9-7-115 Limited Exempti on, Startup and Shutdown 9-7-116 Limited Exemption, Compliance Extension for Facilities Subject to Regulation 9, Rule 9 9-7-117 Limited Exemption, Devices Rated 75 MM BTU/hr and Higher Limited to 9 PPMV NOx

9-7-200 DEFINITIONS

9-7-201 Annual Heat Input 9-7-202 Annual Maximum Heat Capacity 9-7-203 Boiler or Steam Generator 9-7-204 British Thermal Unit (BTU) 9-7-205 Digester Gas 9-7-206 Digester Gas-Fired Device 9-7-207 Gaseous Fuel 9-7-208 Heat Input 9-7-209 Heat-Input Weighted Average 9-7-210 Higher Heating Value (HHV) 9-7-211 Landfill Gas 9-7-212 Landfill Gas-Fired Device 9-7-213 Load-Following Unit 9-7-214 Natural Gas 9-7-215 Natural Gas Curtailment 9-7-216 Nitrogen Oxide (NOx) Emissions 9-7-217 Process Heater 9-7-218 Rated Heat Input 9-7-219 Shutdown Period 9-7-220 Startup Period 9-7-221 Therm

9-7-300 STANDARDS

9-7-301 Interim Emission Limits 9-7-302 Deleted 9-7-303 Deleted 9-7-304 Interim Low Fuel Usage Requirements 9-7-305 Deleted 9-7-306 Deleted 9-7-307 Final Emission LimitsBay Area Air Quality Management District July 30, 2008 9-7-2 9-7-308 Compliance Schedule 9-7-309 Final Low Fuel Usage Requirements 9-7-310 Prohibition of Commerce in Uncertified Devices 9-7-311 Insulation Requirements 9-7-312 Stack Gas Temperature Limits 9-7-313 Tune-Up Requirements

9-7-400 ADMINISTRATIVE REQUIREMENTS

9-7-401 Deleted 9-7-402 Deleted 9-7-403 Initial Demonstration of Compliance 9-7-404 Registration 9-7-405 Compliance with Emissions Standards – Devices Rated Less Than 10 Million BTU/hr Input 9-7-406 Application for Certification 9-7-407 Identification 9-7-408 Designation of Load-Following Units

9-7-500 MONITORING AND RECORDS

9-7-501 Combinations of Different Fuels 9-7-502 Deleted 9-7-503 Records 9-7-504 Low Fuel Usage - Monitoring and Records 9-7-505 Original Manufacture Date 9-7-506 Periodic Testing

9-7-600 MANUAL OF PROCEDURES

9-7-601 Determination of Nitrogen Oxides 9-7-602 Determination of Car bon Monoxide and Stack-Gas Oxygen 9-7-603 Compliance Determination 9-7-604 Tune-Up Procedures 9-7-605 Determination of Higher Heating Value

ATTACHMENT 1 – PORTABLE ANALYZER PROTOCOLBay Area Air Quality Management District July 30, 2008 9-7-3 

### REGULATION 9 INORGANIC GASEOUS POLLUTANTS RULE 7 NITROGEN OXIDES AND CARBON MONO XIDE FROM INDUSTRIAL, INSTITUTIONAL, AND COMMERCIAL BOILERS, STEAM GENERATORS, AND PROCESS HEATERS

(Adopted September 16, 1992)

9-7-100 GENERAL

9-7-101 Description: This rule limits the emissions of nitrogen oxides (NOx) and carbon monoxide (CO) from industrial, inst itutional, and commercial boilers, steam generators, and process heaters. 9-7-110 Exemptions: The requirements of this rule shall not apply to the following: 110.1 Boilers, steam generators, and process heaters with a rated heat input of 2 million BTU/hour or less, if fired ex clusively with natural gas, liquefied petroleum gas, or any combination thereof; 110.2 Boilers, steam generators and process heaters with a rated heat input less than 1 million BTU/hour fired with any fuel; 110.3 Boilers, steam generators, and proce ss heaters that are used in petroleum refineries; 110.4 Boilers used by public electric ut ilities or qualifying small power production facilities, as defined in Section 228.5 of the Public Utilities Code, to generate electricity; 110.5 Waste heat recovery boilers that are used to recover sensible heat from the exhaust of combustion turbines or reci procating internal combustion engines; 110.6 Kilns, ovens, and furnaces used for dr ying, baking, heat treating, cooking, calcining, or vitrifying. (Amended July 30, 2008) 9-7-111 Limited Exemption, Low Fuel Usage - Section 9-7-301: The requirements of Section 9-7-301 shall not apply to the use of any boiler, steam generator, or process heater with an annual heat input less than 90,000 therms during each consecutive 12-month period after July 1, 1993, or t hat accepts a limiting condition in their operating permit to limit the annual heat i nput to less than 90,000 therms, provided the requirements of Sections 9-7-304 and 504 are satisfied. (Amended July 30, 2008) 9-7-112 Limited Exemption, Low Fuel Usage: The requirements of Sections 9-7-307 (except as specified below), 311 and 312 sha ll not apply to the use of any boiler, steam generator, or process heater provided that all of the following conditions are met: 112.1 For devices with a rated heat input less than 10 million BTU/hr, the device uses less than 10% of its annual maximum heat capacity in each consecutive 12-month period beginning January 1, 2011 and the requirements of Section 9-7-309 are satisfied; 112.2 For devices with a rated heat input of 10 million BTU/hr or more, the device uses less than 10% of its annual maximum heat capacity in each consecutive 12-month period beginning January 1, 2012 and the requirements of Section 9-7-307.10 are satisfied. An operator of a boiler, steam generator, or process heater that loses eligibility for this exemption by using more than the spec ified amount of fuel in any consecutive 12-month period shall comply with the app licable standards of Section 9-7-307 within 24 months. (Adopted July 30, 2008) 9-7-113 Limited Exemption, Natura l Gas Curtailment and Testing: The requirements of Section 9-7-307 shall not apply to any bo iler, steam generator or process heater while it burns LPG or other non-gaseous f uel during a natural gas curtailment orBay Area Air Quality Management District July 30, 2008 9-7-4 during testing to verify readiness for such a curtailment, provided that all of the following conditions are met: 113.1 The device does not burn LPG or ot her non-gaseous fuel for more than 168 total hours in each consecutive 12-m onth period, plus 48 hours in each consecutive 12-month period for oil-burn readiness testing or state, federal, or local agency-required performance testing, 113.2 The device does not exceed a NOx exhaust concentration of 150 ppmv, and 113.3 The records specified in Section 9-7-503.3 are maintained. (Adopted July 30, 2008) 9-7-114 Limited Exemption, Tune-Up: The emission limits of Section 9-7-307 shall not apply during the tune-up of a boiler, steam generator or process heater required by Section 9-7-313. Emissions shall be mini mized to the extent possible during the exemption period and the tune-up shall be comple ted in as little time as necessary. (Adopted July 30, 2008) 9-7-115 Limited Exemption, Startup and Shutdown: The emission limits of Section 9-7- 307 shall not apply during startup and shutdow n periods provided that all of the following conditions are met: 115.1 Each startup and shutdown period shall not exceed two hours, unless otherwise allowed in a District Permit to Operate. In no case shall the startup period exceed 12 hours, or the shutdown period exceed 9 hours. 115.2 All emission control systems sha ll be in operation and emissions shall be minimized, to the extent possible, during startup and shutdown periods. (Adopted July 30, 2008) 9-7-116 Limited Exemption, Compliance Extens ion for Facilities Subject to Regulation 9, Rule 9: Boilers, steam generators or process heaters located at the same facility as a turbine that is subject to Regulation 9, Rule 9 and that is modified or replaced to comply with Section 9-9-301.2 of that regul ation, shall comply with the requirements of Section 9-7-307 no later than 24 months after the date otherwise specified for compliance in Section 9-7-308. (Adopted July 30, 2008) 9-7-117 Limited Exemption, Devices Rated 75 MM BTU/hr or Higher Limited to 9 PPMV NOx: The emission limits of Section 9-7-307. 6 shall not apply to any boiler, steam generator or process heater that is limited to 9 ppmv NOx or less by a District Permit to Operate in effect on or before July 30, 2008 as long as that permit limit remains in effect. (Adopted July 30, 2008)

9-7-200 DEFINITIONS

9-7-201 Annual Heat Input: The total heat input of fuels burned by a combustion source during any consecutive 12-month period, as determined from the higher heating value and cumulative annual usage of each fuel. 9-7-202 Annual Maximum Heat Capacity: The amount of heat i nput that a device would have if it operated at its rated heat input continuously for 365 consecutive days. (Adopted July 30, 2008) 9-7-203 Boiler or Steam Generator: Any combustion equipment used to produce steam or to heat water. (Renumbered July 30, 2008) 9-7-204 British Thermal Unit (BTU): The amount of heat required to raise the temperature of one pound of water from 59 o to 60 o F at one atmosphere. (Renumbered July 30, 2008) 9-7-205 Digester Gas: Gas derived from the decomposition of organic matter in a digester. (Adopted July 30, 2008) 9-7-206 Digester Gas-Fired Device: A boiler, steam generator or process heater that fires or co-fires digester gas at least 90% of its operating time, on a calendar year basis. (Adopted July 30, 2008) 9-7-207 Gaseous Fuel: Any fuel that is a gas at 68 o F and one atmosphere. (Adopted July 30, 2008) 9-7-208 Heat Input: The heat of combustion released due to burning a fuel in a source, using the higher heating value of the fuel. This does not include the sensible heat of incoming combustion air.Bay Area Air Quality Management District July 30, 2008 9-7-5 (Renumbered July 30, 2008) 9-7-209 Heat-Input Weighted Average: The heat input of the gaseous fuel per unit time divided by the total heat input per unit time and the heat input per unit time of the non-gaseous fuel divided by the total heat input per unit time. The calculated fractions are used to calculate the app licable weighted average ppmv emission limit of Section 9-7-301.3. (Amended, Renumbered July 30, 2008) 9-7-210 Higher Heating Value (HHV): The total heat liberated per mass of fuel burned (BTU per pound), when fuel and dry air at standard conditions undergo complete combustion and all resultant products are br ought to their standard states at standard conditions. The HHV is determined as specified in Section 9-7-605. (Renumbered July 30, 2008) 9-7-211 Landfill Gas: Gas derived from the decompos ition of waste in a landfill. (Adopted July 30, 2008) 9-7-212 Landfill Gas-Fired Device: A boiler, steam generator or process heater that fires or co-fires landfill gas at least 90% of it s operating time, on a calendar year basis. (Adopted July 30, 2008) 9-7-213 Load-Following Unit: A unit that cannot be operated in a base-loaded mode, and that has normal operational load fluct uations and requirements, imposed by fluctuations in the process(es) served by the unit, that exceed the operational response range of a Ultra-Low NOx burner system operating at 9 ppmv NOx, as determined by the District and indicat ed on the device’s permit to operate. (Adopted July 30, 2008) 9-7-214 Natural Gas: Any mixture of gaseous hydrocarbons containing at least 80 percent methane by volume, as determined according to Standard Method ASTM D1945-64. (Renumbered July 30, 2008) 9-7-215 Natural Gas Curtailment: A shortage in the supply of pipeline natural gas, due solely to supply limitations or restricti ons in distribution pipelines by the utility supplying the gas, and not due to the cost of natural gas. (Adopted July 30, 2008) 9-7-216 Nitrogen Oxide (NOx) Emissions: The sum of nitric oxide (NO) and nitrogen dioxide (NO 2 ) in the flue gas, collectively expressed as nitrogen dioxide. (Renumbered July 30, 2008) 9-7-217 Process Heater: Any combustion equipment that transfers heat from combustion gases to water or process streams. A process heater does not include any kiln, furnace or oven that is used for drying, baki ng, heat treating, cooking, calcining, or vitrifying. A process heater also does not include a space heating device that is primarily intended to only heat ambient air. (Amended, Renumbered July 30, 2008) 9-7-218 Rated Heat Input: The heat input capacity specifi ed on the nameplate of the boiler, steam generator or process heater, or the sum of the capacities on the nameplates of the burners in the boiler, steam generator or process heater, whichever is greater. (Amended, Renumbered July 30, 2008) 9-7-219 Shutdown Period: The period of time during which a unit is taken from an operational to a non-operational status. (Adopted July 30, 2008) 9-7-220 Startup Period: The period of time during which a unit is brought from a nonoperational status to operating temperature, including the time required for the unit’s emission control system to reach full operation. (Adopted July 30, 2008) 9-7-221 Therm: One hundred thousand (100,000) BTU's. (Renumbered July 30, 2008)

9-7-300 STANDARDS

9-7-301 Interim Emission Limits: No person shall operate a boiler, steam generator or process heater with a rated heat input gr eater than or equal to 10 million BTU per hour unless the following emission limits are met: 301.1 Nitrogen oxide (NOx) emissions shall not exceed 30 ppmv, dry at 3 percent oxygen when gaseous fuel is used;Bay Area Air Quality Management District July 30, 2008 9-7-6 301.2 Nitrogen oxide (NOx) emissions shall not exceed 40 ppmv, dry at 3 percent oxygen when non-gaseous fuel is used; 301.3 Nitrogen oxide (NOx) emissions s hall not exceed the heat-input weighted average of the limits in Sections 9- 7-301.1 and 301.2 when a combination of gaseous and non-gaseous fuel is used; 301.4 Carbon monoxide (CO) emissions shall not exceed 400 ppmv, dry at 3 percent oxygen. This section shall not apply to any boiler, steam generator, or process heater subject to a NOx or CO emission limit in Section 9-7-307. (Amended July 30, 2008) 9-7-302 Deleted July 30, 2008 9-7-303 Deleted July 30, 2008 9-7-304 Interim Low Fuel Usage Requirements: No person shall operate any boiler, steam generator or process heater under the limited exemption in Section 9-7-111, or with rated heat input less than 10 million BTU per hour with the capability of firing any non-gaseous fuel, without doing at least one of the following: 304.1 Operate in a manner that maintains stack-gas oxygen concentrations at less than or equal to 3 percent by volume on a dry basis; or 304.2 Perform an inspection and tune-up at least once every 12 months by a technician in accordance with the proc edure specified in Section 9-7-604; or 304.3 Meet the emission limits s pecified in Sections 9-7-301. (Amended July 30, 2008) 9-7-305 Deleted July 30, 2008 9-7-306 Deleted July 30, 2008 9-7-307 Final Emission Limits: No person shall operate a boiler, steam generator or process heater with a rated heat input list ed in the table below that exceeds the corresponding NOx and CO emission limits on or after the corresponding effective date specified in Section 9-7-308. Where more than one NOx limit applies to a device, the device will be subject only to the higher (less restrictive) NOx limit.

Emission Limit Rated Heat Input (million BTU/hr) NOx Limit (ppmv) CO Limit (ppmv)

307.1 >2 to 5 30 400

307.2 >5 to <10 15 400

307.3 10 to <20 15 400

307.4 20 or more, load-following unit 15 400

307.5 20 to <75 9 400

307.6 75 or more 5 400

307.7 10 or more, landfill gas-fired or digester gas-fired device 30 400

307.8 1 or more while firing only nongaseous fuel 40 400

307.9 1 or more while firing acombination of gaseous and nongaseous fuel heat-input weighted average of gaseous & non-gaseous limit 400

307.10 10 or more, while operated under exemption 9-7-112.2 30 400

(Adopted July 30, 2008) 9-7-308 Compliance Schedule: Boilers, steam generators and process heaters subject to the requirements of Section 9-7-307 sha ll comply with those requirements in accordance with the schedule in the table below.Bay Area Air Quality Management District July 30, 2008 9-7-7 Section At least 33% of devices at a single facility At least 66% of devices at a single facility 100% of devices at a single facility

9-7-307.1 Effective Date: Later of January 1, 2011 OR 10 years after original manufacture date if manufactured prior to January 1, 2011 One year after Effective Date Two years after Effective Date

9-7-307.2 9-7-307.3 Effective Date: Later of January 1, 2012 OR 10 years after original manufacture date if manufactured prior to January 1, 2012 One year after Effective Date Two years after Effective Date

9-7-307.4 9-7-307.5 9-7-307.6 Effective Date: Later of January 1, 2012 OR 5 years after original manufacture date if manufactured prior to January 1, 2012 One year after Effective Date Two years after Effective Date

9-7-307.7 9-7-307.10 July 30, 2008 July 30, 2008 July 30, 2008

9-7-307.8 9-7-307.9 Effective Date: January 1, 2011 for devices with rated input <10 MM BTU/hr; July 30, 2008 for devices with rated input ≥ 10 MM BTU/hr One year after Effective Date Two years after Effective Date

(Adopted July 30, 2008)

9-7-309 Final Low Fuel Usage Requirements: No person shall operate any boiler, steam generator or process heater under the limited exemption in Section 9-7-112.1 without doing at least one of the following: 309.1 Operate in a manner that maintains stack-gas oxygen concentrations at less than or equal to 3 percent by volume on a dry basis; or 309.2 Perform an inspection and tune-up at least once per calendar year by a technician in accordance with the proc edure specified in Section 9-7-604; or 309.3 Meet the applicable emissi on limits in Section 9-7-307. (Adopted July 30, 2008) 9-7-310 Prohibition of Commerce in Uncertified Devices: No person shall sell, offer for sale, or install any boiler, steam generator or process heater subject to Section 9-7- 307.1 or 307.2 unless the device is certifi ed in accordance with Sections 9-7-405 and 406. (Adopted July 30, 2008) 9-7-311 Insulation Requirements: Effective January 1, 2010, no person shall operate a boiler or steam generator unless the expos ed, external surface of the device, including all pipes and ducts heated by the dev ice, does not exceed a temperature of 120oF. This requirement shall not apply to any of the following: 311.1 Any device that meets the definition of a high-temperature water boiler in California Code of Regulations, Title 8. 311.2 Any surface or appurtenance that must remain un-insulated for safety or operational reasons. 311.3 Any surface that has at least one inch of insulation, or that does not exceed a temperature of 140oF with no insulation. 311.4 Any surface heated by a source ot her than the boiler or steam generator, including sunlight. 311.5 Any exhaust stack surface. (Adopted July 30, 2008) 9-7-312 Stack Gas Temperature Limits: Effective January 1, 2011, no person shall operate a boiler or steam generator with a sta ck gas temperature (downstream of any economizer) that exceeds the i ndicated maximum temperature:Bay Area Air Quality Management District July 30, 2008 9-7-8 Heater Design Maximum Temperature (oF) Gaseous Fuel Non-Gaseous Fuel firetube 100oF over saturated steam temperature for steam boiler, 100oF over hot water temperature for hot water boiler OR 250 oF greater than ambient temperature, whichever is higher 100oF over saturated steam temperature for steam boiler, 100oF over hot water temperature for hot water boiler OR 300 oF greater than ambient temperature, whichever is higher watertub

e 150oF over saturated steam temperature for steam boiler, 150oF over hot water temperature for hot water boiler OR 250 oF greater than ambient temperature, whichever is higher 150oF over saturated steam temperature for steam boiler, 150oF over hot water temperature for hot water boiler OR 300 oF greater than ambient temperature, whichever is higher (Adopted July 30, 2008) 9-7-313 Tune-Up Requirements: Effective January 1, 2009, no person shall operate a boiler, steam generator or process heater unl ess they do at least one of the following each calendar year: 313.1 Operate at less than 10% of its annual maximum heat capacity during the calendar year; or 313.2 Perform an inspection and tune-up at least once per calendar year by a technician in accordance with the pr ocedure specified in Section 9-7-604. (Adopted July 30, 2008)

9-7-400 ADMINISTRATIVE REQUIREMENTS

9-7-401 Deleted July 30, 2008 9-7-402 Deleted July 30, 2008 9-7-403 Initial Demonstration of Compliance: No person shall operate a boiler, steam generator or process heater that is subject to the requirements of Sections 9-7-307.3, 307.4, 307.5, 307.6 or 309.1 unless an initial s ource test to verify compliance with these requirements is conducted in accordanc e with Sections 9-7-601 or 602 within 1 year of the date these require ments are effective. Alter natively, devices subject to Sections 9-7-307.3, 307.4 or 309.1 may be tested using a portable analyzer that meets the specification standards and using t he testing protocol in Attachment 1. This section does not apply to any device r equired to perform verification testing to establish compliance with applicable requi rements of Sections 9-7-307.3, 307.4, 307.5, 307.6 or 309.1 in accordance with a Di strict Authority to Construct issued on or after January 1, 2011. (Amended July 30, 2008) 9-7-404 Registration: Effective January 1, 2011, no pers on shall operate any boiler, steam generator or process heater subject to Se ction 9-7-307.1 or 307.2 unless the device is registered in accordance with Regulation 1, Section 410. Any person registering a device shall pay the fees specified in Regul ation 3. This registration requirement shall not apply to any device for which t he operator holds a District Permit to Operate. (Adopted July 30, 2008) 9-7-405 Compliance with Emissions Standards – Devices Rated Less Than 10 Million BTU/hr Input: The manufacturer shall obtain confirmation from an independent testing laboratory that each boiler, steam generator or process heater model it sells or distributes for sale into t he District that is subject to the requirements of Section 9- 7-307.1 or 307.2 has been tested in accordance with the procedures in Sections 9-7- 601 and 602. This requirement shall not apply to burner assemblies sold as retrofit packages. (Adopted July 30, 2008) 9-7-406 Application for Certification: 406.1 Each manufacturer shall submit an app lication to the APCO for certification of their compliant boiler, steam gener ator or process heater model. The application must:Bay Area Air Quality Management District July 30, 2008 9-7-9 1.1 Provide the following general information: name and address of manufacturer, brand name, trade nam e, model number and heat input rating as it appears on the water heater rating plate. 1.2 Provide a description of the model being certified 1.3 Include a complete certification s ource test report demonstrating that the boiler or water heater model was tested in accordance with procedures in Sections 9-7-601 and 602 and a written statement that the model complies with Section 9-7-307.1 or 307.2 and is tested in accordance with procedures in Sections 9-7-601 and 602. 1.4 Be submitted to the District no more than 90 days after the date of the emissions compliance test conducted in accordance with Section 9-7- 405. 1.5 Be submitted to the District no le ss than 90 days before the first sale or distribution within the Di strict that occurs on or after January 1, 2011, of a boiler, steam generator or process heater model. 406.2 After completing review of the applic ation for certification and source test report, the APCO will approve, or w ill deny approval of the device. 406.3 Certification status shall be valid for three years from the date of approval by the APCO. After the third year, recert ification shall be required according to the requirements in 9-7-406. (Adopted July 30, 2008) 9-7-407 Identification: The boiler, steam generator or process heater manufacturer shall display the model number and the certificati on status of the boiler, steam generator or process heater on the shipping cart on and on the rating plate of each unit. (Adopted July 30, 2008) 9-7-408 Designation of Load-Following Units: To be eligible for the load-following emission standard in section 9-7-307, a uni t must be designated a load-following unit by the APCO on the unit Permit to Operate. In order to support this designation, the unit operator shall include the following information with an application for an Authority to Construct or an application for a modification to a Permit to Operate, as specified in Regulation 2: 408.1 A description of the processes t he unit serves and the normal operational load fluctuations and load requirement s imposed on the unit, verifying that the unit cannot be operated in a base-loaded mode. 408.2 A detailed report on the design and c ondition of the unit, burner(s), burner controls, and any other subsystem that may affect the ability of the unit to comply with a 9 ppmv NOx limit, including a verification that the unit is free of air leaks, and is operated within norma l design parameters, and is otherwise free of significant design defects and physical defects and is operated within reasonable parameters. This report shall ve rify that the inability of the unit to comply with a 9 ppmv NOx limit is s ubstantially caused by the system load fluctuations and the limitations of st ate-of-the-art, commercially-available, 9 ppmv burners and burner controls, ra ther than any other factor. 408.3 Technical data such as steam demand c harts or other information to support the description and report described above. (Adopted July 30, 2008)

9-7-500 MONITORING AND RECORDS

9-7-501 Combinations of Different Fuels: No person shall simultaneously fire combinations of different fuels in a device subject to the requirements of Sections 9- 7-301.3 or 307.9 without first installing a non -resettable totalizing fuel meter in each fuel line for each source. (Amended July 30, 2008) 9-7-502 Deleted July 30, 2008 9-7-503 Records: Any person subject to the requirements of this rule shall keep records of the following: 503.1 Documentation verifying tune-ups per formed in accordance with Sections 9- 7-304.2, 309.2 or 313.2.Bay Area Air Quality Management District July 30, 2008 9-7-10 503.2 In the event that t he limited exemption in Section 9-7-113 is invoked, documentation from the natural gas supp lier verifying that natural gas was unavailable due to a natural gas curtailment. 503.3 Documentation verifying the hours of equipment testing using non-gaseous fuel, and of total operating hours using non-gaseous fuel during each calendar month. 503.4 The results of any testing r equired by Sections 9-7-403 or 506. 503.5 Digester gas-fired and landfill gas-fir ed devices operating under Section 9-7- 307.7 shall maintain records of total operating hours and operating hours firing or co-firing digester or landfill gas. Such records shall be retained for a mini mum of 24 months from date of entry and be made available to District staff upon request. (Amended July 30, 2008) 9-7-504 Low Fuel Usage - Monitoring and Records: Any person who operates a boilers

, steam generator or process heater under t he limited exemption of Section 9-7-111 or 112 shall comply with the following requirements: 504.1 Operate a non-resettable totalizing me ter for each fuel that demonstrates that the source operated at or below the applicable heat input level, or receive APCO approval for using utility se rvice meters, purchase or tank fill records, or any other acceptable me thods for measuring the cumulative annual usage of each fuel; and 504.2 Have available for inspection by the APCO annual fuel use data and the Higher Heating Value of each fuel used, for the prior consecutive 12-month period. Records shall be maintained and made accessible to the APCO for a period of 24 months from the date the record is made. An operator of a boiler, steam generator or process heater who claims eligibility for the limited exemption in Section 9-7-111 or 112, but who fails to maintain records to allow verification of fuel usage shall have t he burden of proof to establish eligibility for the limited exemption. (Amended July 30, 2008) 9-7-505 Original Manufacture Date: Any person who operates a boiler, steam generator or process heater that is subject to a st andard in Sections 9-7-307.1 through 307.6 and that elects to use an effective date for this standard that is based on the original manufacture date of the device shall make av ailable the original manufacture date of the device on the original manufacturer’s identification or rating plate permanently fixed to the device, or else on a c opy of the manufacturer’s invoice. (Adopted July 30, 2008) 9-7-506 Periodic Testing: No person shall operate a boiler, steam generator or process heater subject to an emission limit specifi ed in the table below unless they verify compliance with the limit at the specified intervals. Testing shall be performed in accordance with Sections 9-7-601 and 602. Alternatively, devices may be tested using a portable analyzer that meets t he specification standards and using the testing protocol in Attachment 1. No person shall operate a device that use nongaseous fuel unless they perform testing us ing non-gaseous fuel to verify compliance with Section 9-7-307.8 or 307.9, in addition to testing to verify compliance with any other applicable standard in Section 9-7-307. This section does not apply to any device required to perform periodic testing in accordance with a District Permit to Operate or to any device that verifies compliance with an emission limit with a District-approved conti nuous emission monitor.

Emission Limit Testing Interval

9-7-307.3 Every two years (no less than 18 months and no more than 24 months), beginning with the effe ctive date in Section 9-7-308.

9-7-307.4, 9-7-307.5, 9-7-307.6, or 9-7-309.1 Every year (no less than 10 months and no more than 12 months), beginning with the effe ctive date in Section 9-7-308.Bay Area Air Quality Management District July 30, 2008 9-7-11 9-7-307.8 or 9-7-307.9 Within 60 days of the first us e of non-gaseous fuel in anycalendar year in which non-gaseous fuel is used. Use of nongaseous fuel for oil-burn readiness testing or state, federal, or local agency-required performanc e testing, not exceeding a total of 48 hours in a calendar year, will not trigger periodic testing.

(Adopted July 30, 2008)

9-7-600 MANUAL OF PROCEDURES

9-7-601 Determination of Nitrogen Oxides: The methods by which samples of exhaust gases are collected and analyzed to determine concentrations of nitrogen oxides are set forth in the District Manual of Procedures, Volume IV , ST-13 A or B. 9-7-602 Determination of Carbon Monoxide and Stack-Gas Oxygen: Compliance with the carbon monoxide emission requirements ofSections 9-7-301 and 307 and the stackgas oxygen concentration requirement of Sections 9-7-304.1 and 309.1 shall be determined as set forth in the District Manual of Procedures, Volume IV, ST-6 (carbon monoxide) and ST-14 (oxygen). (Amended July 30, 2008) 9-7-603 Compliance Determination: All emission determinations shall be made in the asfound operating condition, except that no compliance determination shall be established during startup or shutdown. (Amended July 30, 2008) 9-7-604 Tune-Up Procedures: The tune-up procedure required by Section 9-7-304.2, 309.2 and 313.2 shall be performed in accordance with the procedure set forth in the District Manual of Procedures, Volume I, Chapter 5. (Adopted 9/15/93; Amended 7/30/08) 9-7-605 Determination of Higher Heating Value: If certification of the Higher Heating Value is not provided by the third-party fuel s upplier, it shall be determined by one of the following test methods: (1) ASTM D2015-85 for solid fuels; (2) ASTM D240-87 or ASTM D2382-88 for liquid hydrocarbon fuels; or (3) ASTM D1826-88, or ASTM D1945-81 in conjunction with AST M D3588-89, for gaseous fuels.Bay Area Air Quality Management District July 30, 2008 9-7-12 Attachment 1

Portable Analyzer Protocol

Emission readings using a portable analyzer s hall be averaged over a 15 consecutive-minute period by either taking a cumulative 15-consecut ive-minute sample reading or by taking at least five (5) readings evenly spaced over the 15-cons ecutive-minute period. If the results of the portable analyzer show that the NOx or CO emi ssions from the unit exceed the applicable limits, then the unit shall be source tested no later t han 60 days from the date of discovering such exceedance.

Portable Analyzer Specifications

A. General: A portable analyzer consists of a sample interface, a gas detector, and a data recorder, and is used to quantitatively analyze stack gas for one or more components. A portable analyzer for CO, O2, or NOx shall be considered approved by t he District if it adheres to the standards that are set forth in th is section, is used in accordance with the standards of this section, and is used in acco rdance with the manufacturer's specifications. Other portable analyzers and techniques ar e approvable on a case by case basis.

B. Definitions:

Sample interface: That portion of the portable analyz er used for one or more of the following: sample acquisition, sample transpor t, sample conditioning, or protection of the portable analyzer from the effects of the stack effluent. Gas detector: That portion of the portable analyzer t hat senses the gas to be measured and generates an output proportional to the gas concentration. Data recorder: A strip chart recorder, digital recorder , or any other device used for recording or displaying measurement data from the gas detector output. Resolution: The smallest increment of output that t he gas detector will provide. This value should be reported by the equipment manufacturer. Error: The maximum standard measurement error ov er the measurement range. This value should be reported by the equipment manufacturer. Detection Limit: The lowest concentration of gas that can be detected by the gas detector. This value should be reported by the equipment manufacturer. Response Time: The amount of time required for the portable analyzer to display 95% of a step change in gas concentration on the data recorder.

C. Equipment: The portable analyzer shall adhere to t he standards tabulated below for each of the pollutants that it is intended to measure. A ll values in the table refer to maximum values. In addition to the parameters contained in t he table, the minimum upper limit of the measurement range shall be equal to 1.5 time s the emission limit for the species being measured.

Detector Resolution Error Detection Limit Response Time CO 20 ppm ± 50 ppm 50 ppm 1 min O2 0.5% ± 1.0% 0% 1 min NOx 1 ppm ± 1 ppm 5 ppm 1 min

D. Calibration: Each gas detector shall be calibrated a minimum of once every six months and all instrument calibration data shall be kept on file with the monthly analyses. If the manufacturer recommends calibration more than once every six months, then the instrument calibration shall follow the manufacturer’s recommended interval. Two calibration gases are required, the upper limit calibration gas sha ll have a concentration of 60-100% of the upper limit of the measurement range and the lower lim it calibration gas shall have a concentration from 0-10% of the upper limit of the measur ement range. Ambient air may be used as the upper limit calibration gas for O2 and may be used as the lower limit calibration gas for bothBay Area Air Quality Management District July 30, 2008 9-7-13 NOx and CO. The system response time shall be determined during the gas detector calibration. The portable analyzer shall first be purged with ambient air. Calibration gas is then provided to the portable analyzer through a tubing length typically used during analysis. The time necessary for the data recorder to di splay a concentration equal to 95% of the final steady state concentration shall be recorded as the response time.

E. Measurement:

1. Concentration measurements shall not be ta ken until the sample acquisition probe has been exposed to the stack gas for at least 150% of the response time. Measurements shall be taken in triplicate. 2. If water vapor is not removed prior to meas urement, the absolute humidity in the gas stream must be determined so that the gas concentrati ons may be reported on a dry basis. If water vapor creates an interference with the measur ement of any component, then the water vapor must be removed from the gas stream prior to concentration measurements. 3. The concentration of NOx is calculated as t he sum of the volumetric concentrations of both NO and NO2. The portable analyzer used to det ect NOx must either convert NO2 to NO and measure NO, convert NO to NO2 and measure NO2, or measure both NO and NO2. An NO2 to NO converter is not necessary if data are presented to demonstrate that the NO2 portion of the exhaust gas is less than 5 per cent of the total NOx concentration.