October 8, 2015

Placer County APCD 250

- 1 Rules and Regulations



### RULE 250 STATIONARY GAS TURBINES

Adopted 10

- 17

- 94

(Amended 10

- 08

- 15)

CONTENTS

100 GENERAL

101 PURPOSE

102 APPLICABILITY

1 10 03 EXEMPTION

- LABORATORY, FIREFIGHTING/FLOOD CONTROL, AND PIPELINE

UNITS

1 04 11 EXEMPTION

- EMERGENCY STANDBY AND SMALL UNITS

200 DEFINITIONS

201 BARCT

202 CHEMICAL PROCESSING GAS TURBINE UNIT

203 201 COMPLIANCE LIMIT

20 4 2 CONTROL SYSTEM OPERATING PARAMETERS

20 3 5 EMERGENCY STANDBY UNIT

20 4 6 HHV

MAJOR SOURCE

20 7 5 LHV NOx EMISSIONS

20 8 6 PERFORMANCE TESTING MEASURED N Ox EMISSIONS CONCENTRATION

20 9 7 NOx EMISSIONS (NOx)

210 PIPELINE GAS TURBINES

21 1 0 POWER AUGMENTATION

2 1 2 1 08 PUBLIC SERVICE UNIT

2 09 1 3 2 RATING

21 4 3 0 SELECTIVE CATALYTIC REDUCTION (SCR)

21 5 4 STATIONARY GAS TURBINE

SELECTIVE CATALYTIC REDUCTION (SCR)

21 6 5 1 STATIONARY GAS TURBINE STARTUP THERMAL STABILIZATION PERIOD

21 6 2 SHUTDOWN SHUTDOWN

213 STARTUP

300 STANDARDS

301 LIMITATIONS

302 STARTUP/SHUTDOWN COMBINED CYCLE UNITS

303 STARTUP/SHUTDOWN COMBINED SIMPLE CYCLE UNITS

400 ADMINISTRATIVE REQUIREMENTS

401 COMPLIANCE SCHEDULE

402 EMISSION CONTROL PLAN

403 EXEMPT UNITS AND EMERGENCY STANDBY UNITS

500 MONITORING AND RECORDKEEPING

501 MONITORING

502 RECORDKEEPING

503 TEST METHODSOctober 8, 2015

Rules and Regulations 250

- 2 Placer County APCD This Page Intentionally Left BlankOctober 8, 2015

Placer County APCD 250

- 3 Rules and Regulations 100 GENERAL

101 PURPOSE: The purpose of this rule is to limit NOx emissions from stationary gas

turbines

. in conformance with BARCT determinations approved by the California Air

Resources Board to meet the requirements of the California Clean Air Act.

102 APPLICABILITY : Except as provided in Sections 110 and 111, : T t his rule shall apply to

all stationary gas turbines, 0.3 megawatt (MW) and larger.

1 10 03 EXEMPTION

- – LABORATORY

, OR FIREFIGHTING/FLOOD CONTROL , AND

PIPELINE UNITS: The provisions of this rule with the exception of Section 402.3 shall

not apply to the operation of stationary gas turbines used under the following conditions:

1 10 0 4 3 .1 Laboratory units used in research and testing for the advancement of

gas turbine technology.

`

1 0 4 3 10 .2 Units operated exclusively for firefighting and/or flood control.

110.3 Pipeline gas turbines provided that the owner/operator demonstrates to the

satisfaction of the Air Pollution Control Officer that water or steam injection,

selective catalytic reduction, or any other emission control technology is not

technologically feasible, cost effective or creates adverse environmental impacts

such as those associated with the use, transport, or disposal of supplies such as

wa ter and ammonia.

110.4 Chemical processing gas turbine units

.

1 11 04 EXEMPTION

- EMERGENCY STANDBY AND SMALL UNITS: The provisions of

this rule with the exception of Section s 402.3, 403, and 502.5 502.5 shall not apply to the

operation of stationary gas turbines used under the following conditions:

1 11 04 .1 Emergency standby units demonstrated to operate less than 200 hours per

calendar year.

1 11 04 .2 Units of less than 4 MW operating less than 877 hours per calendar year.

105 EXEMPTION

– LOW USE UNITS: The monitoring provisions of Section 501.1.3 shall

not apply to low use units operating less than 877 hours per year and installed prior to

October 8, 2015.

105 EXEMPTION

– EXISTING SIMPLE CYCLE UNITS: The provisions of Section 302,

Startup and Shutdown shall not apply to simple cycle units in operation prior to October

9, 2015 and operating less than 877 hours per year.

200 DEFINITIONS

201 BARCT: "Best Available Retrofit Control Technology" as defined in Section 40406 of the

California Health and Safety Code as an "emission limitation that is based on the

maximum degree of reduction achievable, taking into account environmental, energy, and

econo mic impacts by each class or category of source".

202 CHEMICAL PROCESSING GAS TURBINE UNIT: A stationary gas turbine that vents its

exhaust gases into the operating stream of a chemical process.October 8, 2015

Rules and Regulations 250

- 4 Placer County APCD

203 201 COMPLIANCE LIMIT: Allowable NOx emissions expressed in parts per

million by volume (ppmv).

20 4 2 CONTROL SYSTEM OPERATING PARAMETERS: Operating parameters that the Air

Pollution Control Officer deems necessary to analyze when determining compliance,

such as ammonia and exhaust flow rates and exhaust gas temperature for SCR; of

humidity, water injection rate, exhaust gas flow rate, and temperature for water injection.

20 5 3 EMERGENCY STANDBY UNIT: A stationary gas turbine that operates only as a

mechanical or electrical power source for a facility when the primary power source has

been rendered inoperable due to a failure beyond the reasonable control of the operator,

except due to power interrupt ion pursuant to a voluntary interruptible power supply

agreement. Electricity generated by such a unit cannot be sold.

20 6 4 HHV: The higher heating value of a fuel. MAJOR SOURCE: For the

purpose of this rule a m ajor source is defined as a stationary source with a potential to

emit exceeding: 25 tons per year of nitrogen oxides, 25 tons per year of volatile organic

compounds, 100 tons per year of sulfur dioxide, 100 tons per year of carbon monoxide,

100 tons per year of PM10, or 100 tons per year of a regulated air pollutant.

20 7 LHV: The lower heating value of the fuel.

20 8 5 MEASURED NOx EMISSIONS CONCENTRATION: The concentration of NOx

emissions corrected to International Standards Organization (ISO) standard conditions:

NOx = (NOx obs )(P ref

/P obs ) 0.5 (288 o

/T amb ) 1.53 [e 19(Hobs

- 0.00633) ]

Where:

Nox

= Emissions of NOx at 15 percent oxygen and ISO standard conditions on a dry basis,

ppm.

Nox obs = Measured NOx emissions corrected to 15 percent oxygen on a dry basis, ppm.

P ref = Standard reference pressure, 14.696 psia.

P obs = Measured site ambient absolute pressure, psia.

H obs = Measured humidity of ambient air, pounds water per pound dry air.

e = Transcendental constant (2.718).

T amb = Measured temperature of ambie nt air, degrees K.

or an alternate correlation that corrects to ISO standard conditions and is approved by the Air

Pollution Control Officer.

209 NOx EMISSIONS (N O o x): The sum of nitric oxides and nitrogen dioxide in the exhaust gas

stream.

210 PIPELINE GAS TURBINES: A stationary gas turbine used to transport gases or liquids

in a pipeline.

2 1 1 0 0 6 PERFORMANCE TESTING: Performance testing for stationary source air emissions is

also known as stack testing or source testing. Performance testing is the measurement of

air emissions.

207 POWER AUGMENTATION: An increase in the gas turbine shaft output and/or the

decrease in gas turbine fuel consumption by the addition of energy recovered from

exhaust heat.

2 1 2 1 0 8 PUBLIC SERVICE UNIT: A gas turbine used to generate electricity for sale or for

use in serving the public.October 8, 2015

Placer County APCD 250

- 5 Rules and Regulations 2 1 0 9 3 2 RATING: The continuous megawatt (MW) rating or mechanical equivalent by a

manufacturer for gas turbine(s) without power augmentation.

2 1 0 1 4 3 SELECTIVE CATALYTIC REDUCTION (SCR): A post combustion control technology

that utilizes ammonia injected into the exhaust gas stream where it reduces NOx to

molecular nitrogen in the presence of a catalyst.

2 1 1

21 4 5 STATIONARY GAS TURBINE: Any gas turbine system that is gas and/or liquid

fueled with or without power augmentation. This unit is either attached to a foundation at

a facility or is portable equipment operated at a specific facility for more than 90 days in

any 12

- month period. Two or more gas turbines powering one shaft shall be treated as

one unit.

21 2 5 6 SHUTDOWN : The time necessary to cease operation of a gas turbine under load

conditions. The period begins when the shutdown command is given to the gas turbine.

This time shall not exceed one (1) hour.

STARTUP THERMAL STABILIZATION PERIOD: The two hour start

- up time necessary to bring the

heat recovery steam generator a unit to the normal operating proper temperature, not to

exceed two (2) hours

. If the unit fails to synchronize online properly an additional period

of two (2) hours for simple cycle and six (6) hours for combined cycle units is allowed

.

21 3 7 STARTUP: The time necessary to bring the gas turbine to the design rating not to

exceed two (2) hours for simple cycle and six (6) hours for combined cycle gas turbine

power plants.

SHUTDOWN : The time needed to shut down the unit.

300 STANDARDS

301 LIMITATIONS: The owner or operator of any stationary gas turbine unit shall not operate

such unit under load conditions, excluding the thermal stabilization startup or shutdown

period which results in the measured NOx emissions concentration exceeding the

compliance limit listed below, averaged over 15 minutes one (1) hour based on four

consecutive 15

- minute averages :October 8, 2015

Rules and Regulations 250

- 6 Placer County APCD Unit Size Compliance limit

NO

x , ppm @ 15% O 2

Megawatt Rating (MW) Gas A Oil B

Units rated 0.3 to Less Than 2.9 MW

OR

and Units Greater Than or Equal to 4 MW That

Operate Less Than 877 Hour/Year 42 65

2.9 to Less Than 10 MW 25 x EFF /25 65

10.0 MW and Over with SCR 9 x EFF /25 25 x EFF /25

10.0 MW and Over Without SCR 15 x EFF /25 42 x EFF /25

A. GAS INCLUDES NATURAL, DIGESTER, AND LANDFILL GASES.

B. OIL INCLUDES KEROSINE, JET, AND DISTILLATE. THE SULFUR CONTENT OF THE OIL SHALL BE

LESS THAN 0.05%.

Where: EFF (efficiency) is the higher of the following:

301.1 EFF

= 3412 x 100%

AHR

[where: AHR = Actual Heat Rate at HHV of Fuel (BTU/KW

- HR)], which is the demonstrated

percent efficiency of the gas turbine only as calculated without consideration of any downstream

energy recovery from the actual heat rate, (BTU/KW

- HR) or 1.34 (BTU/HP

- HR); corre cted to the

HHV (higher heating value) of the fuel and ISO conditions, as measured at peak load for that

facility, or

301.2 EFF

= MRE x LHV

HHV

[where: MRE = Manufacturer's Rated Efficiency with Air Pollution Equipment at LHV.], which is

the manufacturer's continuous rated percent efficiency of the gas turbine with air pollution

equipment after correction from LHV to HHV of the fuel at peak load for that facility.

302 STARTUP/SHUTDOWN COMBINED CYCLE UNITS : The NOx emissions shall meet

at least o ne of the following averaged over the duration of the startup or shutdown period :

:

302.1 70 ppm @ 1 5% O 2 ?? p for turbines fired on gas or,

302.2 0.16 p ounds per MMBtu /hr input d for turbines fired on gas or oil or

,

302.3 2 26 ppm @ 15% O 2 for t urbines fired on oil liquid fuels

.

303 STARTUP/SHUTDOWN SIMPLE CYCLE UNITS: The NOx emissions shall be kept to a

minimum by use of the following:

303.1 Manufacturer’s recommendation for operation during startup and shutdown.

303.2 Injection of water as soon as reasonably possible

303.3 Maintaining proper air to fuel ratios

400 ADMINISTRATIVE REQUIREMENTSOctober 8, 2015

Placer County APCD 250

- 7 Rules and Regulations 401 COMPLIANCE SCHEDULE: Owners or operators of all gas turbines existing on the

date of adoption and subject to the provisions of this rule shall comply with the

applicable provisions of Section 301 in accordance with the following schedule:

401.1 No later than May 31, 1995, demonstrate final compliance.

402 EMISSION CONTROL PLAN: The owner or operator of any existing stationary gas

turbine shall submit to the Air Pollution Control Officer for approval an Emissions

Control Plan of all actions, including a schedule of increments of progress, which will

be taken to meet or exceed req uirements of the applicable emissions limitations in

Section 301 and compliance schedule in Section 401.

402.1 The Emission Control Plan shall contain, as a minimum, a list that provides the

following for each gas turbine subject to the provisions of th is rule:

a. Permit or identification number;

b. Name of gas turbine manufacturer;

c. Model designation;

d. Rated shaft power output (MW);

e. Type of liquid fuel and/or type of gaseous fuel;

f. Fuel consumption (cubic feet of gas or gallons of liquid) for the previous one

- year

period;

g. Hours of operation in the previous one

- year period;

h. Heat rate (BTU/KW

- HR), corrected to the HHV for each type of fuel (liquid/gas), and

I. HHV for each fuel.

402.2 A listing of all gas turbines required to be controlled, identifying the type of

emission control to be applied to each gas turbine along with documentation showing

existing emissions of oxides of nitrogen.

402.3 Support documentation for any units exempt under the provisio ns of Sections

110 and 111.

403 EXEMPT UNITS AND EMERGENCY STANDBY UNITS : Exempt units and

emergency standby units shall comply with the following:

40 1 3 .1 The owner or operator of any unit listed below shall notify the Air Pollution

Control Officer in writing within seven days if the 877 hour

- per

- year limit is

applicable and was exceeded. A public service unit operating during a state of

emergency, when such emergency is declared by proclamation of the Governor

of the State of California and when the unit is located in the specific geographical

location identified in the proclamation, shall be excluded from the hour

- per

- year

limit. If the hour

- per

- year limit is exceeded, the exemption shall be permanently

withdrawn. Within 30 days after the exceedance, the owner or operator shall

submit a an application for Authority to Construct that details a plan to meet the

applicable limits specified in Section 301 of thi s rule within two years. Included in

this application, the owner or operator shall submit an emission control plan that

includes a schedule of increments of progress for the installation of the requiredOctober 8, 2015

Rules and Regulations 250

- 8 Placer County APCD control equipment. This schedule shall be subject to the review and approval of

the Air Pollution Control Officer.

a. 401.1.1 Any unit smaller than 4 MW or emergency standby unit exempt

under Sections 110 and 111.

b. 401.1.2 Any unit equal to or greater than 4 MW.

500 MONITORING AND RECORDKEEPING

501 MONITORING: The owner or operator of any stationary gas turbine subject to the

provisions of this rule shall perform the following actions:

501.1 Install, operate and maintain in calibration equipment, as approved by the Air

Pollution Control Officer

, that continuously measures and records the following:

a. 501.1.1 Control system operating parameters;

b 501.1.2

. Elapsed time of operation; and

c. 5

- 0 1.1.3 For units of 10 MW or greater that operate d more than 4000

hours per year over the last three years prior to July 13, 1994 , the

exhaust gas NOx concentrations on a continuous basis corrected to ISO

conditions at 15 percent oxygen on a dry basis. The NOx monitoring

system shall meet U.S. Environmental Protection Agency ( EPA )

requirements as specified in 40 CFR Part 60, App. B, Spec ification

. 2 or

other systems that are acceptable to the EPA.

501.2 Performance Testing: Performance testing shall be conducted annually for

major sources of NOx and at least every three ye ars for non

- major sources of

NOx.

502 RECORDKEEPING:

502.1 All records shall be available for inspection at any time for a period of five (5)

years for major source and two (2) years for non

- major sources

. . Major sources

are those facilities that emit more than twenty

- five (25) tons of NOx.

502.2 Submit to the Air Pollution Control Officer information demonstrating that the

system has data gathering and retrieval capability.

502.3 Submit to the Air Pollution Control Officer, prior to issuance of a Permit to

Operate, information correlating the control system operating parameters to the

associated NOx output. This information may be used by the Air Pollution Control

Officer to determine compliance when there is no continuous emission

monitoring system for NOx available or when the continuous emission monitoring

system is not operating properly.

502.4 Provide performance source test information annually regarding the exhaust gas

NOx concentration at ISO conditions corrected to 15 percent oxygen on a dry

basis

. , and the demonstrated percent efficiency (EFF) of the turbine unit.

502.5 Maintain a gas turbine operating log that includes, on a daily basis , the actual

Pacific Standard Time start

- up and stop time, total hours of operation, type and

quantity of fuel used (liquid/gas). This information shall be available for inspection

at any time from the date of entry.October 8, 2015

Placer County APCD 250

- 9 Rules and Regulations

502.6 Maintain a gas turbine operat ing log for units exempt under Section 111 that

includes, on a daily basis, the actual Pacific Standard Time start

- up and stop

time, total hours of operation, and cumulative hours of operation to date for the

calendar year. This information shall be availa ble for inspection at any time for

two years from the date of entry and submitted to the Air Pollution Control Officer

at the end of each calendar year in a manner and form approved by the Air

Pollution Control Officer.

503 TEST METHODS:

503.1 Oxides of Nitrogen (NO

x ): Oxides of Nitrogen (NO

x ) emissions shall be

determined in accordance with EPA Method 20.

503.2 Oxygen (O 2 ): Oxygen (O 2 ) concentrations shall be determined in accordance

with EPA Method 3A.

503.3 HHV and LHV: HHV and LHV shal l be determined in accordance with ASTM D

240

- 87, Standard Test Method for Heat of Combustion of Liquid Hydrocarbon

Fuels by Bomb Calorimeter, or D

- 2382

- 88, Standard Test Method for Heat of

Combustion of Hydrocarbon Fuels by Bomb Calorimeter (High

- precisio n

Method), for distillate fuels, and ASTM D

- 3588

- 91, Standard Practice for

Calculating Heat Value, Compressibility Factor, and Relative Density (Specific

Gravity) of Gaseous Fuels, ASTM D

- 1826

- 88, Standard Test Method for Calorific

(Heating) Value of Gase s in Natural Gas Range by Continuous Recording

Calorimeter, or ASTM D

- 1945

- 81, Standard Method for Analysis of Natural Gas

by Gas Chromatography, for gaseous fuels.