SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT

PROTOCOL



### NITROGEN OXIDES EMISSIONS COMPLIANCE TESTING FOR NATURAL GAS-FIRED WATER HEATERS

AND SMALL BOILERS

MARCH 1995

(AMENDED JANUARY 1998)

SOURCE TESTING AND ENGINEERING BRANCH
APPLIED SCIENCE AND TECHNOLOGYSOUTH COAST AIR QUALITY MANAGEMENT DISTRICT

PROTOCOL



### NITROGEN OXIDES EMISSIONS COMPLIANCE TESTING FOR NATURAL GAS-FIRED WATER HEATERS

AND SMALL BOILERS

MARCH 1995

(AMENDED JANUARY 1998)

SOURCE TESTING AND ENGINEERING BRANCH
APPLIED SCIENCE AND TECHNOLOGYTABLE OF CONTENTS
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-iTABLE OF CONTENTS.................................. ............... i 1.0 OVERVIEW AND APPLICABILITY.................... ............... 1 2.0 ENVIRONMENTAL CRITERIA........................ ............... 3 3.0 DEFINITIONS................................... ............... 4 3.1 INDEPENDENT TESTING LABORATORY................ ........... 4 3.2 NATURAL GAS-FIRED WATER HEATER................ ........... 4 3.3 NATURAL GAS-FIRED BOILER...................... ........... 4 3.3.1 HOT WATER HEATING BOILER.................... ....... 4 3.3.2 HOT WATER SUPPLY BOILER..................... ....... 5 3.3.3 STEAM HEATING BOILER........................ ....... 5 3.4 NATURAL GAS-FIRED POOL HEATER................. ........... 5 4.0 TEST CONDITIONS............................... ............... 6 4.1 AMBIENT AIR TEMPERATURE....................... ........... 6 4.2 SUPPLY WATER TEMPERATURE...................... ........... 6 4.2.1 STORAGE, INSTANTANEOUS, AND CIRCULATING WAT ER

HEATERS........................................... 6 4.2.2 POOL HEATERS................................ ....... 6 4.2.3 STEAM AND HOT WATER BOILERS................. ....... 6 4.3 SUPPLY WATER PRESSURE......................... ........... 7 4.3.1 WATER HEATERS............................... ....... 7 4.3.2 POOL HEATERS................................ ....... 7 4.3.3 STEAM AND HOT WATER BOILERS................. ....... 7 4.4 NATURAL GAS PRESSURE.......................... ........... 7 4.5 INSTALLATION REQUIREMENTS..................... ........... 7 5.0 INSTRUMENTATION............................... ............... 8 5.1 PRESSURE MEASUREMENT.......................... ........... 8 5.2 TEMPERATURE MEASUREMENTS...................... ........... 8 5.3 BAROMETRIC PRESSURE........................... ........... 9 5.4 LIQUID FLOW MEASUREMENTS...................... ........... 9 5.5 NATURAL GAS FLOW.............................. ........... 9 5.6 MASS MEASUREMENT.............................. ........... 9 5.7 TIME.......................................... ........... 9 5.8 FLUE GAS ANALYSIS............................. .......... 10 5.8.1 NOx CONCENTRATION........................... ...... 10 5.8.2 CO CONCENTRATION............................ ...... 10TABLE OF CONTENTS
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-ii5.8.3 CARBON DIOXIDE OR OXYGEN ANALYSIS........... ...... 10 5.8.3.1 CO2 CONCENTRATION......................... .. 10 5.8.3.2 O2 CONCENTRATION.......................... .. 10 5.8.4 SAMPLE CONDITIONING SYSTEM.................. ...... 10 5.8.4.1 Sample Probe.............................. .. 11 5.8.4.1.1 Integrating Sample Probes............. 11 5.8.4.1.2 Open Ended Sample Probes.............. 11 5.8.4.2 Sample Lines.............................. .. 11 5.8.4.3 Moisture Removal System................... .. 12 5.8.4.3.1 Permeation-Type Dryers................ 12 5.8.4.3.2 Refrigerated Condenser/Separator...... 12 5.8.4.4 Sample Pump............................... .. 12 5.8.4.5 Flow Indicators........................... .. 12 5.8.4.6 Pressure Indicators....................... .. 12 5.8.4.7 Sample Vent............................... .. 13 5.9 NATURAL GAS COMPOSITION....................... .......... 13 6.0 ANALYTICAL METHODS............................ .............. 14 6.1 START UP...................................... .......... 14 6.1.1 ANALYZERS................................... ...... 14 6.1.2 SAMPLE CONDITIONING SYSTEM.................. ...... 14 6.2 CALIBRATION AND PERFORMANCE TESTING........... .......... 14 6.2.1 ANALYZER CALIBRATION........................ ...... 14 6.2.2 SAMPLING SYSTEM BIAS TEST................... ...... 14 6.2.3 RESPONSE TIME............................... ...... 15 6.2.4 NO2 TO NO CONVERSION EFFICIENCY............. ...... 15 6.3 ANALYSIS...................................... .......... 16 6.3.1 SAMPLE POINT................................ ...... 16 6.3.1.1 Appliances with Vents Less Than 12 Inch

Diameter..................................... 16 6.3.1.2 Appliances With Vents 12 Inch Diameter or

Greater...................................... 16 6.3.1.3 Appliances Which Do Not Have Vents......... .. 17 6.3.2 SAMPLING PERIOD............................. ...... 18 6.3.2.1 Integrating Sample Probes................. .. 18 6.3.2.2 Sample Traverses.......................... .. 18TABLE OF CONTENTS
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-iii6.3.3 DATA RECORDING.............................. ...... 18 7.0 INSTALLATION.................................. .............. 19 7.1 STORAGE TANK WATER HEATERS WITH INPUT RATINGS BELOW

75,000 BTU/HR...................................... .. 19 7.1.1 WATER HEATER MOUNTING....................... ...... 19 7.1.2 WATER SUPPLY................................ ...... 19 7.1.3 WATER INLET AND OUTLET CONFIGURATION........ ...... 19 7.1.4 FUEL CONSUMPTION............................ ...... 20 7.1.5 INTERNAL STORAGE TANK TEMPERATURE MEASUREMEN TS.... 20 7.1.6 AMBIENT TEMPERATURE......................... ...... 21 7.1.7 INLET AND OUTLET WATER TEMPERATURE MEASUREME NTS... 21 7.1.8 FLOW CONTROL................................ ...... 21 7.1.9 VENT REQUIREMENTS........................... ...... 22 7.1.10 NATURAL GAS SAMPLE......................... ...... 22 7.2 STORAGE TANK WATER HEATERS WITH INPUT RATINGS ABOVE 75,000 BTU PER HOUR................................ ..... 23 7.2.1 WATER HEATER MOUNTING....................... ...... 23 7.2.2 WATER SUPPLY................................ ...... 23 7.2.3 WATER INLET AND OUTLET CONNECTIONS.......... ...... 23 7.2.3.1 Storage Tank Water Heaters................. .. 23 7.2.3.2 Instantaneous & Circulating Water Heaters.. .. 24 7.2.4 FUEL CONSUMPTION............................ ...... 24 7.2.5 INTERNAL STORAGE TANK TEMPERATURE MEASUREMEN TS.... 24 7.2.6 AMBIENT TEMPERATURE......................... ...... 25 7.2.7 INLET AND OUTLET WATER TEMPERATURE MEASUREME NTS... 25 7.2.7.1 Storage Tank Water Heater.................. .. 25 7.2.7.2 Instantaneous and Circulating Water Heaters .. 25 7.2.8 FLOW CONTROL................................ ...... 25 7.2.9 VENT REQUIREMENTS........................... ...... 25 7.2.9.1 Appliances Equipped With Draft Hoods...... .. 25 7.2.9.2 Direct Vent Appliances.................... .. 26 7.2.10 NATURAL GAS SAMPLE......................... ...... 26 7.3 POOL HEATERS.................................. .......... 26 7.3.1 Pool Heater Mounting........................ ...... 26 7.3.2 Water Supply................................ ...... 26TABLE OF CONTENTS
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-iv7.3.3 Water Inlet and Outlet Connections.......... ...... 26 7.3.4 Fuel Consumption............................ ...... 27 7.3.5 Internal Storage Tank Temperature Measuremen ts.... 27 7.3.6 Ambient Temperature......................... ...... 27 7.3.7 Inlet and Outlet Water Temperature Measureme nts... 27 7.3.8 Flow Control................................ ...... 28 7.3.9 Vent Requirements........................... ...... 28 7.3.10 Natural Gas Sample......................... ...... 28 7.4 STEAM AND HOT WATER BOILERS................... .......... 29

7.4.1 STEAM BOILERS............................... .. 29 7.4.1.1 Boiler Installation....................... .. 29 7.4.1.2 Water Supply.............................. .. 29 7.4.1.3 Water Inlet and Outlet Connection......... .. 29 7.4.1.4 Water Consumption......................... .. 29 7.4.1.5 Fuel Consumption.......................... .. 30 7.4.1.6 Ambient Temperature....................... .. 30 7.4.1.7 Inlet and Outlet Temperature Measurements. .. 30 7.4.1.8 Vent Requirements......................... .. 30 7.4.1.9 Natural Gas Sample........................ .. 31 7.4.2 HOT WATER BOILERS........................... ...... 31 7.4.2.1 Boiler.................................... .. 31 7.4.2.2 Water Supply.............................. .. 31 7.4.2.3 Water Inlet and Outlet Connections........ .. 31 7.4.2.4 Water Consumption......................... .. 32 7.4.2.5 Fuel Consumption.......................... .. 32 7.4.2.6 Ambient Temperature....................... .. 32 7.4.2.7 Inlet and Outlet Water Temperature

Measurement................................. 32 7.4.2.8 Flow Control.............................. .. 32 7.4.2.9 Vent Requirements......................... .. 33 7.4.2.10 Natural Gas Sample........................ .. 33 8.0 TEST PROCEDURE................................ .............. 34 8.1 STORAGE TANK WATER HEATERS WITH INPUT RATINGS OF 75,000 BTU PER HOUR OR LESS............................... ..... 34 8.1.1 POWER INPUT................................. ...... 34TABLE OF CONTENTS
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-v8.1.2 DETERMINATION OF STORAGE TANK VOLUME........ ...... 34 8.1.3 SETTING THE THERMOSTAT...................... ...... 34 8.1.4 EMISSION TESTING............................ ...... 34 8.2 STORAGE TANK WATER HEATERS WITH INPUT RATINGS ABOVE 75,000 BTU PER HOUR................................ ..... 36 8.2.1 POWER INPUT................................. ...... 36 8.2.2 SETTING THE THERMOSTAT...................... ...... 36 8.2.3 EMISSION TESTING............................ ...... 36 8.2.3.1 Instantaneous Water Heaters with Input

Ratings of 200,000 BTU per Hour or Less...... 36 8.2.3.2 Storage with Input Ratings Above 75,000 BTU

per Hour, Instantaneous with Input Ratings Above 200,000 BTU per Hour, and Circulating Water Heaters................................ 37 8.3 POOL HEATERS.................................. .......... 38 8.3.1 Power Input................................. ...... 38 8.3.2 Outlet Water Temperature.................... ...... 38 8.3.3 Emission Testing............................ ...... 39 8.4 STEAM AND HOT WATER BOILERS................... .......... 40 8.4.1 STEAM BOILERS............................... ...... 40 8.4.1.1 Power Input............................... .. 40 8.4.1.2 Outlet Steam Pressure..................... .. 40 8.4.1.3 Emission Testing.......................... .. 40 8.4.2 HOT WATER BOILER............................ ...... 41 8.4.2.1 Power Input............................... .. 41 8.4.2.2 Outlet Water Temperature.................. .. 41 8.4.2.3 Emission Testing.......................... .. 41 9.0 CALCULATIONS.................................. .............. 43 9.1 CARBON NUMBER................................. .......... 43 9.2 HEATING VALUE................................. .......... 44 9.3 HEAT OUTPUT................................... .......... 45 9.3.1 STORAGE TANK WATER HEATERS WITH INPUT RATIN GS OF

75,000 BTU/HR OR LESS............................ 45 9.3.1.1 Storage Tank Capacity..................... .. 45 9.3.1.2 Computation............................... .. 45TABLE OF CONTENTS
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-vi9.3.2 STORAGE TANK WATER HEATERS WITH INPUT RATIN GS

ABOVE 75,000 BTU PER HOUR, CIRCULATING, AND INSTANTANEOUS WATER HEATERS, AND POOL HEATERS.... 46 9.3.3 STEAM BOILERS............................... ...... 47 9.3.4 HOT WATER BOILERS........................... ...... 47 9.4 EMISSION OF NOX............................... .......... 48 9.4.1 NOx EMISSION (ng/J Heat Output)............. ...... 48 9.4.2 NOx EMISSION (Concentration at 3% O2)....... ...... 48 9.4.3 NOx EMISSION (lb/MMBtu)..................... ...... 49 10.0 REPORT....................................... .............. 50 10.1 TEST RESULTS................................. .......... 50 10.1.1 ENVIRONMENT AND HOT WATER PRODUCTION....... ...... 50 10.1.2 EMISSION MEASUREMENTS...................... ...... 50 10.1.3 GAS COMPOSITION ANALYSIS................... ...... 51 10.1.4 ANALYZER CALIBRATION AND SAMPLING SYSTEM BI AS

TEST............................................. 51 10.1.5 NO2 CONVERTER EFFICIENCY TEST.............. ...... 51 10.2 FORMS USED FOR PERFORMING THE CALCULATIONS... .......... 51 10.2.1 CALCULATION OF HEAT OUTPUT................. ...... 51 10.2.2 CORRECTION OF GAS METER READING AND

DETERMINATION OF FIRING RATE..................... 52 10.2.3 CALCULATION OF NOx EMISSIONS............... ...... 52 DRAWINGS AND FIGURES............................... .............. 53 DATA AND CALCULATION FORMS......................... .............. 60-1- NITROGEN OXIDES EMISSIONS COMPLIANCE TESTING FOR NATURAL GAS-FIRED WATER HEATERS & BOILERS
PROTOCOL

1.0 OVERVIEW AND APPLICABILITY

The South Coast Air Quality Management District ado pted Rule 1121, Control of Nitrogen Oxides from Residential T ype, Natural Gas-Fired Water Heaters, on December 1, 1978. This rule imposes an emission limit of 40 nanograms of NO x (calculated as NO 2 ) per joule of heat output for residential type, natural gas-fired water heaters. Natural gas-fired water heaters req uire testing to certify compliance with the 40 nanograms of NO x per joule emission limit before they can be supplied, offered for sale or sold within the jurisdiction of the South Coast Air Quality Management District.
Proposed Rule 1146.2, which applies to equipment la rger than those regulated by Rule 1121, seeks to limit NOx em issions from commercial water heaters, small industrial boilers, and process heaters. These combustion equipment must also be t ested and certified before they can be supplied, offered for sale or sold within the jurisdiction of the South Coast Air Qual ity Management District. Compliance will be based either on a nan ogram per joule of heat output basis, or a concentration basi s (parts per million, or pounds per million Btu heat input).
This protocol has been developed to support Rules 1 121 and 1146.2 to ensure standardization of compliance certificati on test-2-

procedures including the use of: specified test co nditions, required test methods, specifications for test equi pment, data collection/reporting and quality assurance requirem ents.
An independent testing laboratory, approved by the South Coast Air Quality Management District, shall conduct the testing and prepare a report of findings, including all raw dat a sheets/charts and laboratory analytical data. This report and a request for product certification must be submitted to the Executive Officer. The testing must demonstrate to the satisfaction of the Executive Officer that emission s from the operation of a natural gas-fired water heater or bo iler meets the requirements of Rules 1121 and 1146.2 before produc t compliance certification is granted.
When a natural gas-fired water heater or boiler doe s not fall within the testing guidelines of this protocol, the protocol may be modified following an equivalency determination and written approval of the Executive Officer.-3- 2.0 ENVIRONMENTAL CRITERIA
Testing shall be conducted indoors with the ambient air temperature of the test room maintained between 65 o F and 85 o F at all times during the test. The ambient air tempera ture during these tests shall not vary more than + 7 o F from the average ambient air temperature determined as the arithmeti c average of the air temperatures measured periodically at inter vals no greater than 15 minutes throughout the duration of the test.
The ambient temperature shall be monitored and reco rded before, during, and after the tests in accordance with Sect ion 7.1.6 of this protocol.
The relative humidity shall be between 20% and 65% during the test. It shall be recorded before and after the te st.
The barometric pressure shall be monitored and reco rded before and after each test.-4- 3.0 DEFINITIONS
For the purposes of this test protocol, the followi ng definitions shall apply:

3.1 INDEPENDENT TESTING LABORATORY A testing laboratory that meets the requirements o f

South Coast Air Quality Management District's Rule 304, Paragraph (K) , and is approved by the SCAQMD to conduct testing under this protocol.

3.2 NATURAL GAS-FIRED WATER HEATER A closed vessel, in which water is heated by the

combustion of natural gas and is withdrawn for use external to the vessel at pressures not exceeding 1 60 psig, including the apparatus by which heat is gene rated and all controls and devices necessary to prevent w ater temperatures from exceeding 210 o F.

3.3 NATURAL GAS-FIRED BOILER A self-contained gas burning appliance for supplyi ng

steam or hot water. A boiler can be of the followi ng types:

3.3.1 HOT WATER HEATING BOILER A boiler in which no steam is

generated, from which hot water is circulated for heating purposes and then returned to the boiler.-5-

3.3.2 HOT WATER SUPPLY BOILER A boiler, completely filled

with water, which furnishes hot water to be used externally to itself, and which operates at water pressures not exceeding 160 psig (1.10 MPa) and at water temperatures not exceeding 250 o F (121 o C) at or near the boiler outlet.

3.3.3 STEAM HEATING BOILER A boiler in which steam is

generated and/or produced.

3.4 NATURAL GAS-FIRED POOL HEATER An appliance designed for heating non-potable wate r

stored at atmospheric pressure, such as water in swimming pools, spas, hot tubs and similar applicat ions.-6- 4.0 TEST CONDITIONS

4.1 AMBIENT AIR TEMPERATURE The ambient air temperature shall be controlled to a

value between 65 o F and 85 o F on a continuous basis.

4.2 SUPPLY WATER TEMPERATURE 4.2.1 STORAGE, INSTANTANEOUS, AND CIRCULATING WATER HEATERS

The temperature of water being supplied to the wate r heater shall be maintained at 72 + 4 o F throughout the test. Instantaneous and circulating water heaters may use a recirculating line with pump to control inlet water temperature as specified by the manufacturer. The specified inlet water temperature for circulating w ater heaters shall not be more than 120 o F.
4.2.2 POOL HEATERS The supply water temperature sh all not be

less than 65 o F and the outlet water temperature not more than 115 o F with a rise of 40 o F. When specified by the manufacturer the water temperature rise may be adju sted to a lower value, but not less than 10 o F with the average temperature of the inlet and outlet being 9 0 o + 5 o F.
4.2.3 STEAM AND HOT WATER BOILERS The temperature of make-up

water shall be 70 o + 2 o F. If required, a recirculating pump may be used to provide feedwater at the manufacturer's specified temperature.-7-

4.3 SUPPLY WATER PRESSURE 4.3.1 WATER HEATERS During tests when water is not being

withdrawn, the supply pressure shall be maintained between 40 psig and the maximum allowable pressure specified by the appliance manufacturer. When wate r is being withdrawn, the supply pressure shall be adequ ate to maintain the specified test flows.
4.3.2 POOL HEATERS The supply pressure shall be ad equate to

maintain the specified test flows.
4.3.3 STEAM AND HOT WATER BOILERS The supply press ure shall

be in accordance with the manufacturer's instructio ns.

4.4 NATURAL GAS PRESSURE Maintain the supply pressure in accordance with th e

manufacturer's specifications. If the supply press ure is not specified, maintain a supply pressure of 7-1 0 inches of water column. Use natural gas with a dry or higher heating value of 1040 + 25 BTU per standard cubic foot (14.73 psia and 60 o F).

4.5 INSTALLATION REQUIREMENTS Tests shall be performed with the water heater and

instrumentation in accordance with Section 7.-8- 5.0 INSTRUMENTATION
All instrumentation within this section and pertain ing to this protocol shall be calibrated as a minimum within th e requirements set forth in SCAQMD Source Test Methods Chapter III , Calibrations.

5.1 PRESSURE MEASUREMENT

Pressure measurement instruments shall have an err or no

greater than the following values:
Measurement Accuracy Precision
Gas Pressure + 0.1" of + 0.05" of water column water column Atmospheric + 0.1" of + 0.05" of Pressure Hg column Hg column Water and Steam + 1.0 psi + 0.50 psi Pressure

5.2 TEMPERATURE MEASUREMENTS Temperature measuring instruments shall have an er ror no

greater than the following values:

Accuracy Precision
Inlet/outlet water temperatures + 0.2 o F + 0.1 o F
Storage Tank Temperature + 0.5 o F + 0.25 o F Ambient Temperature + 0.2 o F + 0.1 o F
The time constant of instruments measuring inlet a nd

outlet water temperatures shall be 5 seconds or les s.-9-

5.3 BAROMETRIC PRESSURE
Use a mercury, aneroid, or other barometer capable of

measuring atmospheric pressure to within 0.1 in. Hg

.

5.4 LIQUID FLOW MEASUREMENTS
The accuracy of liquid flow measurements, using

calibration curves if furnished, shall be equal to or less than + 2% of the measured value.

5.5 NATURAL GAS FLOW
The quantity of fuel used by the water heater shal l be

measured in cubic feet with dry gas meter and assoc iated readout device that is accurate within + 1% of the reading. The dry gas meter reading shall be correc ted for gas pressure and temperature.

5.6 MASS MEASUREMENT

Mass shall be measured with instruments that are

accurate within + 1%.

5.7 TIME
The elapsed time measurement shall be measured wit h an

instrument that is accurate within + 0.5 seconds per hour.-10-

5.8 FLUE GAS ANALYSIS

5.8.1 NO x CONCENTRATION A chemiluminescence NO x Analyzer

shall be employed to measure NO x in flue gas. Performance specifications of the analyzer shall be in accordance with SCAQMD Method 100.1 (Appendix A).

5.8.2 CO CONCENTRATION A non-dispersive infrared analyzer

shall be employed to measure CO in flue gas. Performance specifications of the analyzer shall be in accordance with SCAQMD Method 100.1 (Appendix A).

5.8.3 CARBON DIOXIDE OR OXYGEN ANALYSIS
5.8.3.1 CO 2 CONCENTRATION A non-dispersive infrared analyzer

shall be employed to measure CO 2 in flue gas. Performance specifications of the analyzer shall be in accordance with SCAQMD Method 100.1 (Appendix A).

5.8.3.2 O 2 CONCENTRATION As an alternative to measuring CO 2 for

emission limits which require an oxygen correction, an electrochemical type analyzer shall be employed to measure O 2 in flue gas. Performance specifications of the analyzer shall be in accordance with SCAQMD Met hod 100.1 (Appendix A).

5.8.4 SAMPLE CONDITIONING SYSTEM The NO x , CO, and CO 2 (or O 2 )

analyzers shall sample flue gas delivered by a sing le-11- sample conditioning system. The gases shall be mea sured simultaneously after undergoing identical sample conditioning. Figures 1 and 2 show acceptable samp le conditioning systems. Additional components may be added at the user's discretion. However, deviation s from the basic design must be approved by the Execu tive Officer.

5.8.4.1 Sample Probe
5.8.4.1.1 Integrating Sample Probes Integrating sample probes

may be used with vents less than 12 inches in diame ter. Figure 3 shows an acceptable hole layout for an integrating sample probe. The probe shall be of 31 6 stainless steel construction.

5.8.4.1.2 Open Ended Sample Probes Open ended sample probes

shall be used to sample vents 12 inches in diameter and larger. They shall also be used to measure emissio ns from heaters and boilers designed for outdoor use w hich do not have vents.

5.8.4.2 Sample Lines The sample line shall be of Teflon

construction. It shall be electrically heated. Th e allowable temperature range is 175 o F - 300 o F. The use of self-limiting heated sample line is permitted.-12-

5.8.4.3 Moisture Removal System
5.8.4.3.1 Permeation-Type Dryers A Permapure permeation-type

dryer may be employed to dry the sample gas. The a ir to the dryer shall be dried with a heat-less dryer, which includes a colored moisture indicator.

5.8.4.3.2 Refrigerated Condenser/Separator A refrigerated

condenser/separator designed to minimize contact between the condensate and the sample gas may be us ed to dry the sample gas. The dew point of the dry ga s shall be less than 35 o F.

5.8.4.4 Sample Pump The sample pump shall be a diaphragm type.

The diaphragm shall be Viton A; other wetted parts of the pump shall be 316 stainless steel.

5.8.4.5 Flow Indicators Because the flow indicators in the

sample conditioning system are for the operators convenience, they do not have to be calibrated. Wa ter shall not be allowed to collect in the indicator tu bes.

5.8.4.6 Pressure Indicators Because the pressure indicators in

the sample conditioning system are for the operator s convenience, they do not have to be calibrated.-13-

5.8.4.7 Sample Vent The analyzers shall have an unrestricted

atmospheric sample vent.

5.9 NATURAL GAS COMPOSITION
Heating value or gas composition of the fuel must be

measured. If the heating value is measured, the reproducibility of the measurement device shall be + 1% of full scale. The precision of the device shall b e

+ 2 Btu/dscf. Calibration shall be conducted weekly using the device manufacturer's directions.

If the composition of the fuel is measured, it sha ll be

measured with a gas chromatograph having a TC detec tor. Ethane, Propane, C4+, CO 2 , and permanent gases will be measured directly. Methane may be determined by difference. The reproducibility of the gas chromatograph shall be + 1% of full scale for each measured component.-14- 6.0 ANALYTICAL METHODS

6.1 START UP 6.1.1 ANALYZERS Allow analyzers to warm up according to

manufacturer's instructions. It is recommended tha t the analyzers be allowed to run overnight before testin g.

6.1.2 SAMPLE CONDITIONING SYSTEM Energize sample pump and

sample line. Allow temperatures and flows to come to equilibrium.

6.2 CALIBRATION AND PERFORMANCE TESTING 6.2.1 ANALYZER CALIBRATION Use calibration gases which are

certified according to EPA Traceability Protocol Nu mber 1. CO calibration gases may be certified to an acc uracy of + 2%. Select analytic ranges so that measured gas concentrations are between 20% and 95% of full scal e during the last 10 minutes of each test. Calibrate the analyzers according to the manufacturer's instructi ons and SCAQMD Method 100.1. It is recommended that th e calibration of each analyzer be checked after each test. A 2% drift invalidates the analysis. SCAQMD Method 100.1 is included as Appendix A.

6.2.2 SAMPLING SYSTEM BIAS TEST A sampling system bias test

must be performed in accordance with SCAQMD Method 100.1-15- before and after each day of testing. The sample b ypass flowrate shall not be altered during this test.

6.2.3 RESPONSE TIME The system response time test must be

performed before each day of testing if NO x concentrations are to be determined by multi-point traverse. The response time test may be performed in conjunction with the sampling system bias test.
To determine response time, first introduce zero g as

into the sample probe until all readings are stable ; then switch to high-level calibration gas until a s table reading is obtained. Record the upscale response t ime, which is defined as the amount of time for the syst em to display 95% of the step change. Next re-introduce zero gas until all readings are stable. Record the down scale response time. The greater time is the "response t ime" for the system.

6.2.4 NO 2 TO NO CONVERSION EFFICIENCY The converter

efficiency shall be measured in accordance with EPA Method 20 at least once a month. If the efficiency does not meet the requirements listed in Form I, the converter must be replaced, and all data acquired s ince the last converter efficiency test shall be conside red suspect. The conversion efficiency test is include d as Appendix B.-16-

6.3 ANALYSIS

6.3.1 SAMPLE POINT 6.3.1.1 Appliances with Vents Less Than 12 Inch Dia meter An

integrating sample probe of the proper length is installed six inches from the upper end of the vent pipe. The probe must pass through the center of th e vent and contact the opposite side. A system bias check and leak check shall be performed after changing integrating sample probes.

6.3.1.2 Appliances With Vents 12 Inch Diameter or G reater An

open ended sample probe will be used to traverse th e vent pipe at 1/2 vent diameter below its upper end. The traverse will be conducted along two diameters perpendicular to the axis of the vent and to each o ther. Eight points will be sampled on each diameter. The distance of the sample points from the inside surfa ce of the vent pipe are given in inches in the following table:-17-

VENT ----------------SAMPLE POINT-------------- -------- DIAMETER 1 2 3 4 5 6 7 8

——————————————————————————————————————————————————— ———————— 12 0.5 1.3 2.3 3.9 8.1 9.7 10.7 11.5 13 0.5 1.4 2.5 4.2 8.8 10.5 11.6 12.5 14 0.5 1.5 2.7 4.5 9.5 11.3 12.5 13.5 15 0.5 1.6 2.9 4.8 10.2 12.1 13.4 14.5 16 0.5 1.7 3.1 5.2 10.8 12.9 14.3 15.5 17 0.5 1.8 3.2 5.5 11.5 13.8 15.2 16.5 18 0.6 1.9 3.5 5.8 12.2 14.5 16.1 17.4 19 0.6 2.0 3.7 6.1 12.9 15.3 17.0 18.4 20 0.6 2.1 3.9 6.5 13.5 16.1 17.9 19.4

The sample probe will be progressively inserted in to the

vent pipe along one diameter and then the other unt il all 16 points have been sequentially sampled.

6.3.1.3 Appliances Which Do Not Have Vents Appliances designed

for outdoor use which do not have vents shall be sa mpled by traverse with an open ended probe. The vent gua rd will be divided into 16 rectangles of equal area on a 4x4 matrix. The sample probe shall be sequentially inserted through the vent guard at the center of ea ch rectangle and the emissions analyzed.-18-

6.3.2 SAMPLING PERIOD
6.3.2.1 Integrating Sample Probes When sampling with an

integrating sample probe, the analytical system sha ll operate continuously during the complete test cycle of the appliance. Sampling during appliance warm-up i s not required for storage-type water heaters.

6.3.2.2 Sample Traverses When sample traverses are required,

sampling shall begin after the appliance has reache d steady state as defined in Section 8 for each water heater or boiler. Each traverse point shall be sam pled for at least one minute plus the system response ti me.

6.3.3 DATA RECORDING The output of each analyzer shall be

recorded on a strip chart recorder having a minimum width of six inches. Alternately, the outputs may be recorded with a data logger. The sampling rate of the logger must allow each point to be read at least on ce every 5 seconds.-19- 7.0 INSTALLATION

7.1 STORAGE TANK WATER HEATERS WITH INPUT RATINGS BELOW

75,000 BTU/HR

7.1.1 WATER HEATER MOUNTING Mounting shall be in accordance

with the manufacturer's instructions.

7.1.2 WATER SUPPLY The water supply shall be capable of

delivering water at conditions as specified in Sect ions 4.2 and 4.3 of this protocol.

7.1.3 WATER INLET AND OUTLET CONFIGURATION Inlet and outlet

piping connections shall be configured as illustrat ed in Figures 4, 5, or 6, except a water heater 36 inches high or less intended for installation either beneath, adjacent to, or in conjunction with a counter shall have the inlet and outlet connections configured as illustrated in Figures 7a and 7b. Type "L" hard co pper tubing, the same size as the connections on the wat er heater, shall be connected to the tank and extend 2 4 inches in length. If a water heater 36 inches high or less is not equipped with pipe to extend the field connection point of the water heater lines to outsi de the jacket or cabinet, type "L" hard copper tubing shall be used to extend the water line horizontally to th e exterior of the jacket or cabinet. Unions may be u sed to facilitate installation and removal. A pressure-20- gauge shall be installed in the supply at a locatio n upstream of the 24 inch cold water inlet pipe. An appropriately rated pressure and temperature relief valve shall be installed on all water heaters at th e port specified by the manufacturer. Discharge pipi ng for the relief valve shall be non-metallic. All en ergy conservation accessories which are supplied with th e water heater shall be installed for testing.

7.1.4 FUEL CONSUMPTION Install one or more instruments to

measure the quantity of natural gas consumption in accordance with section 5.5 of this protocol.

7.1.5 INTERNAL STORAGE TANK TEMPERATURE MEASUREMENT S Install

six temperature measurement sensors inside the wate r heater tank with a vertical distance of at least fo ur inches between successive sensors. A temperature s ensor shall be positioned at the vertical midpoint of eac h of the six equal volume nodes within the tank. Nodes designate the equal volumes used to evenly partitio n the total volume of the tank. As much as possible, the temperature sensors should be positioned away from any anodic protective devices, tank walls, and flue pip e walls. If the tank cannot accommodate six temperat ure sensors and meet the installation requirements, ins tall the maximum number of sensors which comply with the installation requirements. The temperature sensors-21- shall be installed either through: (1) the anodic device opening; (2) the relief valve opening; or (3 ) the hot water outlet. If installed through the relief valve opening or the hot water outlet, a tee fitting and elbow shall be installed such that the outlet piping is a s close as possible to its original location. If the hot water heater includes a heat trap, the tee fitting shall be between the heat trap and the storage tank. Fit tings added to accommodate the temperature sensors shall be covered with thermal insulation having a thermal resistance (R) value not less than 4 hr-ft 2

- o F/BTU.

7.1.6 AMBIENT TEMPERATURE The ambient temperature shall be

measured at the approximate vertical mid-point of t he heater and approximately 2 feet from the surface of the water heater. The sensor shall be shielded against radiation.

7.1.7 INLET AND OUTLET WATER TEMPERATURE MEASUREMEN TS Install

temperature sensors in the cold-water inlet pipe an d hot-water outlet pipe as shown in Figures 4, 5, 6, or 7, as applicable and in accordance with ASHRAE STD 41. 1- 1986.

7.1.8 FLOW CONTROL A flow control valve shall be installed to

provide flow as specified within Section 8 of this protocol.-22-

7.1.9 VENT REQUIREMENTS Establish a natural draft in the

following manner. For water heaters having a verti cally discharging draft hood outlet, a five foot vertical vent pipe extension having a diameter equal to the large st flue collar size of the draft hood outlet shall be installed. For water heaters having a horizontally discharging draft hood outlet, a 90 o elbow having a diameter equal to the largest flue collar size of t he draft hood shall be connected to the draft hood out let. A five foot length of standard double walled vent p ipe (Type B vent) shall be connected to the elbow and oriented to discharge vertically upward. Optionall y, a five foot length of single walled vent pipe may be installed if it is insulated up to the sampling por t with glass fiber having a thermal resistance (R) va lue of not less than 4 hr-ft 2

- o F/Btu.

Direct vent water heaters shall be installed with

venting equipment specified in the manufacturers instructions using the minimum vertical and horizon tal lengths of vent pipe recommended by the manufacture r.

7.1.10 NATURAL GAS SAMPLE Valving and a tap shall be provided

in the natural gas supply to allow collecting a sam ple of fuel for composition analysis.-23-

7.2 STORAGE TANK WATER HEATERS WITH INPUT RATINGS ABOVE

75,000 BTU PER HOUR; CIRCULATING AND INSTANTANEOUS WATER
HEATERS.

. 7.2.1 WATER HEATER MOUNTING Mounting shall be in accordance

with the manufacturer's instructions.

7.2.2 WATER SUPPLY The water supply shall be capable of

delivering water at conditions as specified in 4.2 and 4.3 of this protocol.

7.2.3 WATER INLET AND OUTLET CONNECTIONS
7.2.3.1 Storage Tank Water Heaters Storage tank water heaters

which are not equipped with integral heat traps sha ll have inlet and outlet piping connections configured as illustrated in Figures 4, 5, or 6. Storage tank wa ter heaters which incorporate integral heat traps may h ave the inlet and outlet piping installed in any conven ient fashion. Unions may be utilized to facilitate installation and removal.
If the manufacturer has not provided a temperature and

pressure relief valve, one shall be installed on th e water heater at the port specified by the manufactu rer.Discharge piping for the relief valve shall be nonmetallic.-24-

The relief valve and the inlet and outlet piping

including heat traps shall be insulated with a mate rial having a thermal resistance (R) value not less than 4 hr-ft 2

- o F/Btu. The insulation on the inlet and outlet piping shall extend four feet from the connection w ith the appliance.

7.2.3.2 Instantaneous and Circulating Water Heaters Inlet and

outlet piping shall be installed as shown in Figure 8. If the manufacturer has not provided a temperature and pressure relief valve, one shall be installed for t est
purposes.
The inlet and outlet piping including recirculatin g

loop, if used, shall be insulated with material hav ing a thermal resistance (R) value not less than 4 hr-ft 2

- o F/Btu.

7.2.4 FUEL CONSUMPTION Install one or more instruments to

measure the quantity of natural gas consumption in accordance with Section 5.5 of this protocol.

7.2.5 INTERNAL STORAGE TANK TEMPERATURE MEASUREMENT S Internal

tank temperature measurements are not required.-25-

7.2.6 AMBIENT TEMPERATURE The ambient temperature shall be

measured in accordance with Section 7.1.6 of this protocol.

7.2.7 INLET AND OUTLET WATER TEMPERATURE MEASUREME NTS
7.2.7.1 Storage Tank Water Heater The inlet and outlet

temperature sensors shall be installed as shown in Figures 4,5, and 6 as applicable and in accordance with ASHRAE STD 41.1-1986.

7.2.7.2 Instantaneous and Circulating Water Heaters Install

temperature sensors as shown in Figure 8 and in accordance with ASHRAE STD 41.1-1986. Supply and o utlet water sensors shall be located as close to the appl iance as is practical.

7.2.8 FLOW CONTROL A flow control valve shall be installed to

provide flow as specified within Section 8 of this protocol.

7.2.9 VENT REQUIREMENTS
7.2.9.1 Appliances Equipped With Draft Hoods A water heater

having a vertically discharging draft hood shall ha ve attached to and vertically above the outlet, five f eet of vent pipe the same size as the draft hood outlet . A water heater having a horizontally discharging draf t-26- hood shall have attached a 90 o elbow and five feet of vent pipe the same size as the draft hood outlet. If necessary to prevent condensation, the vent pipe mu st be insulated with an (R) value not less than 4 hr-ft 2

- o F/Btu.

7.2.9.2 Direct Vent Appliances The appliance shall be installed

with the venting arrangement specified in the manufacturer's instructions. The venting must be insulated if the inlet flow of combustion air is no t restricted.

7.2.10 NATURAL GAS SAMPLE Valving and a tap shall be provided

in the natural gas supply to allow collecting a sam ple of fuel for composition analysis.

7.3 POOL HEATERS
7.3.1 Pool Heater Mounting Mounting of the pool heater shall

be in accordance with the manufacturer's instructio ns.

7.3.2 Water Supply The water supply shall be capable of

delivering water at conditions as specified in 4.2 and 4.3 of this protocol.

7.3.3 Water Inlet and Outlet Connections Piping connections

shall be as shown in figure 8. Heat traps, insulat ion,-27- and other conservation equipment supplied with the heater shall be installed for testing. When requir ed to achieve temperature rise and minimum flow as specif ied by the manufacturer, a recirculating loop of minimu m length and a pump shall be provided by the manufact urer. The recirculating loop shall be insulated with mate rial having a thermal resistance (R) value of at least 4 hrft 2

- o F/Btu.
Any device provided to maintain water flow rate sh all be

removed or adjusted to prevent bypassing of water a round the heat exchanger.

7.3.4 Fuel Consumption Install one or more instruments to

measure the quantity of natural gas consumed in accordance with Section 5.5 of this protocol.

7.3.5 Internal Storage Tank Temperature Measurement s Internal

tank temperature measurements are not required.

7.3.6 Ambient Temperature The ambient air temperature shall

be measured in accordance with Section 7.1.6 of thi s protocol.

7.3.7 Inlet and Outlet Water Temperature Measuremen ts Install

temperature sensors as shown in Figure 8. Supply a nd outlet water sensors shall be located as close to t he-28- appliance as is practical and in accordance with AS HRAE STD 41.1-1986.

7.3.8 Flow Control A flow control valve shall be installed to

provide flow as specified within Section 8 of this protocol.

7.3.9 Vent Requirements For pool heaters having a vertically

discharging draft hood outlet, a 5 foot vertical ve nt pipe extension having a diameter equal to the large st flue collar size of the draft hood shall be connect ed to the draft hood outlet. For heaters having a horizontally discharging draft hood outlet, a 90 o elbow having diameter equal to the largest collar size of the draft hood shall be connected to the draft hood out let and a vertical 5 feet of length of vent pipe shall be connected to the elbow. If necessary to prevent condensation, the vent pipe must be insulated with an (R) value not less than 4 hr-ft 2

- o F/Btu.
An appliance for outdoor installation with the ven ting

system provided as part of the appliance shall be t ested with the venting system in place.

7.3.10 Natural Gas Sample Valving and a tap shall be provided

in the natural gas supply to allow collecting a sam ple of fuel for composition analysis.-29-

7.4 STEAM AND HOT WATER BOILERS

7.4.1 STEAM BOILERS

7.4.1.1 Boiler Installation The boiler shall be installed in

accordance with the manufacturer's instructions and all applicable safety codes.
Feed water to the boiler shall be automatically

controlled to maintain a constant water level in th e boiler.

7.4.1.2 Water Supply The water supply shall be capable of

delivering water at conditions as specified in 4.2 and 4.3 of this protocol.

7.4.1.3 Water Inlet and Outlet Connection Piping connections

shall be in accordance with the manufacturers instructions and have the general arrangement shown in Figure 9. All conservation equipment supplied with the boiler shall be installed for testing.

7.4.1.4 Water Consumption Install one or more instruments to

measure the quantity of water delivered to the boil er in accordance with Section 5.4 of this protocol.-30-

7.4.1.5 Fuel Consumption Install one or more instruments to

measure the quantity of natural gas consumed in accordance with Section 5.5 of this protocol.

7.4.1.6 Ambient Temperature The ambient air temperature shall

be measured in accordance with Section 7.1.6 of thi s protocol.

7.4.1.7 Inlet and Outlet Temperature Measurements Install a

temperature sensor in the water inlet pipe approxim ately 24 inches from the boiler inlet. Install a tempera ture sensor in the steam outlet pipe within 24 inches of the boiler outlet in accordance with ASHRAE STD 41.1-19 86.

7.4.1.8 Vent Requirements The boiler shall be connected to a

sheet-metal vent pipe the same size as the draft ho od outlet. When the flue gases are vented horizontall y, a 90-degree, four-piece, sheet metal elbow and five f eet of vertical stack shall be attached to and above th e outlet. When the flue gases are vented vertically, five feet of vertical stock shall be attached to and vertically above the outlet. The vent pipe shall b e insulated with a thermal resistance (R) value not l ess than 4 hr-ft 2

- o F/Btu.-31-

A boiler with a power burner or direct vent system shall have vent pipe installed in accordance with the manufacturer's instructions.
An appliance for outdoor installation with the ven ting

system provided as part of the appliance shall be t ested with the venting system in place.

7.4.1.9 Natural Gas Sample Valving and a tap shall be provided

in the natural gas supply to allow collecting a sam ple of fuel for composition analysis.

7.4.2 HOT WATER BOILERS

7.4.2.1 Boiler The boiler shall be installed in accordance with

the manufacturer's instructions and all applicable safety codes.

7.4.2.2 Water Supply The water supply shall be capable of

delivering water at conditions specified in Section s 4.2 and 4.3 of this protocol.

7.4.2.3 Water Inlet and Outlet Connections Piping connections

shall be in accordance with the manufacturer's instructions and have the general arrangement shown in Figure 8. Any conservation equipment supplied with the heater shall be installed for testing. When requir ed, a recirculating loop of minimum length and a pump sha ll be-32- provided by the manufacturer. The recirculating lo op shall be insulated with material having a thermal resistance (R) value of at least 4 hr-ft 2

- o F/Btu.

7.4.2.4 Water Consumption Install one or more instruments to

measure the quantity of water delivered to the boil er in accordance with Section 5.4 of this protocol.

7.4.2.5 Fuel Consumption Install one or more instruments to

measure the quantity of natural gas consumed in accordance with Section 5.5 of this protocol.

7.4.2.6 Ambient Temperature The ambient air temperature shall

be measured in accordance with Section 7.1.6 of thi s protocol.

7.4.2.7 Inlet and Outlet Water Temperature Measurem ent Install

temperature sensors in the water inlet and outlet p iping approximately 24 inches from the boiler and in accordance with ASHRAE STD 41.1-1986. The outlet p iping between the boiler and the temperature sensor shall be insulated with material having a thermal resistance (R) value of not less than 4 hr-ft 2

- o F/Btu.

7.4.2.8 Flow Control A flow control valve shall be installed in

the outlet piping downstream of the temperature sen sor-33- to provide flow as specified in Section 8 of this protocol.

7.4.2.9 Vent Requirements The boiler shall be connected to a

sheet-metal vent pipe the same size as the draft ho od outlet. When the flue gases are vented horizontall y, a 90-degree, four-piece, sheet-metal elbow and five f eet of vertical stack shall be attached to and above th e outlet. When the flue gases are vented vertically, five feet of vertical stack shall be attached to and vertically above the outlet. The vent pipe shall b e insulated with a thermal resistance (R) value not l ess than 4 hr-ft 2

- o F/Btu.
A boiler using a power burner with positive vent

pressures, or with a direct vent system shall have vent pipe installed in accordance with the manufacturer' s instructions.
An appliance for outdoor installation with the ven ting

system provided as part of the appliance shall be t ested with the venting system in place.

7.4.2.10 Natural Gas Sample Valving and a tap shall be provided

in the natural gas supply to allow collecting a sam ple of fuel for composition or heating value analysis.-34- 8.0 TEST PROCEDURE

8.1 STORAGE TANK WATER HEATERS WITH INPUT RATINGS OF 75 ,000

BTU PER HOUR OR LESS

8.1.1 POWER INPUT Burners shall be adjusted to their BTU

input rates at + 10% of the stated manifold pressure. The heater shall be tested within + 2% of the manufacturer's specified normal hourly BTU input ra te.

8.1.2 DETERMINATION OF STORAGE TANK VOLUME Determine the

storage tank capacity, VST, of the water heater, in gallons, by subtracting the tare weight - measured while the tank is empty - from the gross weight of the st orage tank completely filled with water with all air eliminated and dividing the resulting net weight by the density of water at the temperature.

8.1.3 SETTING THE THERMOSTAT The thermostat dial shall be

adjusted so that the maximum mean temperature after cutout is 135 o F + 5 o F.

8.1.4 EMISSION TESTING With the water heater turned off, fill

the water heater with supply water and apply pressu re as described in Section 4.3.1. Turn on the water heat er and allow heater to come to operational temperature

. The water heater may be allowed to come to temperat ure overnight.-35-

Initiate burner cut-in by withdrawing 10 gallons o f

water; wait until cut-out occurs. Measure the mean tank temperature using the temperature sensors described in section 7.1.5 every minute until the maximum mean storage tank temperature is achieved. This is the start of the test. Record the time, the mean tank temper ature (To), and the gas meter reading. Note the test sta rt on the analyzer recorders.

Draw water from the tank at the rate of 3.0 + 0.25

gallons per minute until 10.7 + 0.5 gallons are withdrawn. If burner cut-in has not occurred when 10.7 gallons have been withdrawn, continue withdrawal un til cut-in occurs.
Measure the inlet and outlet water temperature beg inning

15 seconds after the draw is initiated and at subse quent 5 second intervals through the duration of the draw

. Record the time of cut-in and cut-out. The arithme tic mean of the hot water discharge temperature and the cold water inlet temperature shall be determined for the draw. Record the weight or volume of water withdra wn. At the end of the recovery period, record the maxim um tank temperature observed after cut-out, Tmax and t he volume of fuel consumed. Collect a sample of fuel for composition analysis. Determine the arithmetic mea n of the CO 2 and NO x concentrations measured during each of the last three one-minute periods prior to cut-out;-36- record the maximum CO concentration measured during the
test.

8.2 STORAGE TANK WATER HEATERS WITH INPUT RATINGS ABOVE

75,000 BTU PER HOUR; CIRCULATING AND INSTANTANEOUS WATER
HEATERS

. 8.2.1 POWER INPUT Burners shall be adjusted to their BTU

input rates at + 10% of the stated manifold pressure. The heater shall be tested within + 2% of the manufacturer's specified normal hourly BTU input ra te.

8.2.2 SETTING THE THERMOSTAT The thermostat shall be placed

in the maximum position, or bypassed if the device cycles.

8.2.3 EMISSION TESTING
8.2.3.1 Instantaneous Water Heaters with Input Rati ngs of

200,000 BTU per Hour or Less The water flow shall be adjusted to provide a discharge temperature of 135 + 5 o F. After the outlet temperature has become constan t, as indicated by no variation in excess of 1 o F over a three minute period, record the time, water meter a nd gas meter reading. Do not interrupt fuel to the wa ter heater. Record the inlet and outlet temperatures a t every 15 seconds interval throughout the test. Temperature rise cannot change by more than 2 o F during-37- the test. Continuously record the NO x , CO and CO 2 (or
O 2 ) emissions. After 15 minutes or twice the water residence time, whichever is longer, record the wat er meter and gas meter readings. Determine the arithm etic mean of the hot water discharge temperature and the cold water inlet temperature during the draw. Collect a sample of fuel for composition analysis. Determine the arithmetic mean of CO 2 (or O 2 ) and NO x concentrations measured during the last three minutes of the test. Record the maximum CO concentration measured.

8.2.3.2 Storage with Input Ratings Above 75,000 BTU per Hour,

Instantaneous with Input Ratings Above 200,000 BTU per Hour, and Circulating Water Heaters The water flow shall be adjusted to provide a discharge temperatur e of 140 o + 2 o F. After the outlet temperature has become constant, as indicated by no variation in excess of 1 o F over a three minute period, record the time, gas me ter and water meter readings. Do not interrupt the flo w of fuel to the water heater. Record the inlet and out let temperatures at every 15 second interval throughout the test. Temperature rise cannot change by more than 2 o F during the test. Continuously record the NO x , CO and
CO 2 (or O 2 ) emissions. After 15 minutes or twice the water residence time, whichever is longer, record t he water meter and gas meter readings.-38-

If a sample traverse is required, identify the tra verse

point being sampled on the strip chart recorder and record the concentration of NO x and CO 2 (or O 2 ) at each point. When the traverse is complete or after 15 minutes, whichever is longer, record the gas and water meter readings.

Determine the arithmetic mean of the hot water dis charge

temperature and the cold water inlet temperature du ring the test. Collect a sample of fuel for composition analysis. If an integrating sample probe was emplo yed, determine the arithmetic mean of CO 2 (or O 2 ) and NO x concentrations measured during each of the last thr ee one-minute periods of the test. Record the highest CO concentration during the test.

8.3 POOL HEATERS
8.3.1 Power Input Burners shall be adjusted to their BTU

input rates at + 10% of the stated manifold pressure. The heater shall be tested within + 2% of the manufacturer's specified normal hourly BTU input ra te.

8.3.2 Outlet Water Temperature The outlet water temperature

shall not be more than 115 o F, with a temperature rise of
40 o F. When specified by the manufacturer, the water temperature rise may be adjusted to a lower value, but-39- not less than 10 o F, with the average of the inlet and outlet water temperature being 90 o + 5 o F.

8.3.3 Emission Testing Allow the heater to operate until

equilibrium conditions are attained. Equilibrium i s defined as no variation in excess of 2 o F over a three minute period.
Record the time, gas meter and water meter reading s. Do

not interrupt the flow to the heater. Record the i nlet and outlet temperatures at every 15 second interval throughout the duration of the test. Temperature r ise cannot change by more than 2 o F during the test. Continuously record the NO x , CO, and CO 2 (or O 2 ) emissions. If a sample traverse is required, ident ify the traverse point being sampled on the strip chart recorder and record the concentration of NO x and CO 2 (or
O 2 ) at each point. When the traverse is complete or after 15 minutes, whichever is longer, record the w ater and gas meter readings. Determine the arithmetic m ean of the hot water discharge temperature and the cold water inlet temperature during the test. Collect a sample of fuel for composition analysis. Determine the arithmetic mean of CO 2 (or O 2 ) and NO x concentration measured during each of the last three one-minute periods of the test. Record the maximum CO concentration during the test.-40-

8.4 STEAM AND HOT WATER BOILERS

8.4.1 STEAM BOILERS
8.4.1.1 Power Input Burners shall be adjusted to their BTU

input rates at + 10% of the stated manifold pressure. The boiler shall be tested within + 2% of the manufacturer's specified normal hourly BTU input ra te.

8.4.1.2 Outlet Steam Pressure The boiler shall be tested at

atmospheric pressure.

8.4.1.3 Emission Testing Allow the boiler to operate until

equilibrium conditions are attained but not less th an one hour.
When equilibrium conditions are attained, begin

monitoring CO 2 (or O 2 ) and NO x emissions. Record the time, water and fuel meter readings. Record the in let water and outlet steam temperatures at 15 second intervals throughout the test. If a sample travers e is required, identify the traverse point being sampled on the strip chart recorder and record the concentrati on of NO x and CO 2 (or O 2 ) at each point. When the traverse is complete or after 30 minutes, whichever is longer, record the water and gas meter readings. Determine the arithmetic mean of the steam discharge temperature and the cold water inlet temperature during the test.-41- Collect a sample of fuel for composition analysis. If an integrating sample probe is employed, determine the arithmetic mean of CO 2 (or O 2 ) and NO x concentration measured during each of the last three one-minute periods of the test.

8.4.2 HOT WATER BOILER
8.4.2.1 Power Input Burners shall be adjusted to their BTU

input rates at + 10% of the stated manifold pressure. The boiler shall be tested within + 2% of the manufacturer's specified normal hourly BTU input ra te.

8.4.2.2 Outlet Water Temperature The outlet water temperature

shall be 180 o + 2 o F. The water temperature limiting device shall be set to its maximum temperature.

8.4.2.3 Emission Testing Allow the boiler to operate until the

equilibrium conditions are attained, but not less t han one hour. Equilibrium conditions are indicated by no change in outlet water temperature in excess of 5 o F over a 5 minute period.
After equilibrium conditions are attained, begin

monitoring CO, CO 2 (or O 2 ) and NO x emissions. Record water and fuel meter readings and time. Record the inlet and outlet water temperatures at 15 second intervals throughout the duration of the test.-42- Temperature rise cannot change by more than 5 o F during the test. If a sample traverse is required, identi fy the traverse point being sampled on the strip chart recorder and record the concentration of NO x and CO 2 (or
O 2 ) at each point. When the traverse is complete or after 15 minutes, whichever is longer, record the w ater and gas meter readings. After 30 minutes record th e gas and water meter readings. Determine the arithmetic mean of the inlet and outlet water temperatures during t he test. Measure the heating value of the fuel or col lect a sample of fuel for composition analysis. If an integrating sample probe is employed, determine the arithmetic mean of CO 2 (or O 2 ) and NO x concentrations measured during each of the last three one-minute periods of the test.-43- 9.0 CALCULATIONS

9.1 CARBON NUMBER

The carbon number of the fuel can be determined fr om

the measured heating value or determined from gas composition analysis.
Carbon number based on measured heating value is

determined from the equation below:
2 x Heating Value (Btu/scf) Cf = ————————————————————————————— - 0.130 (1) 1771

Carbon number based upon gas composition analysis of

the fuel is determined as follows:

C 1 + 2C 2 + 3C 3 + 4C 4 + C o Cf = —————————————————————————— (2) 100

Where C f is a dimensionless number;
C 1 is concentration of methane in fuel, percent;
C 2 is concentration of ethane in fuel, percent;
C 3 is concentration of propane in fuel, percent;
C 4 is concentration of butane in fuel, percent;
C o is concentration of CO 2 in fuel, percent.-44-

9.2 HEATING VALUE
If heating value is measured, H equals that value in

Btu/dscf. If gas composition analysis is performed , determine heating value as follows:
First compute the compressibility (Z) of the fuel: Z = 1.0 - .001473(C 1 x .0116 + C 2 x .0239 + C 3 x .0344 + C 4 x .0480 + C o x .0197 + I x .0044) 2 (3)
Where "I" is the concentration of Nitrogen in fuel ,

percent;

Then calculate the heating value (H) of the fuel a s

follows:

H = (C 1 x 10.120 + C 2 x 17.737 + C 3 x 25.221

+ C 4 x 32.70) / Z (4)

Where H is the heating value of the fuel in BTU pe r

cubic foot at base conditions of 14.73 pounds per s quare inch absolute and 60 degrees Fahrenheit.-45-

9.3 HEAT OUTPUT

9.3.1 STORAGE TANK WATER HEATERS WITH INPUT RATINGS OF 75,000

BTU/HR OR LESS
9.3.1.1 Storage Tank Capacity Storage tank capacity is computed

with the following:

Vst = (Wf - Wt)/Ds (5)
Where Vst is the storage capacity of the water hea ters,

gallons;
Wf is the weight of the water heater completely fi lled with water, pounds;
Wt is the weight of the empty water heater, pounds ;
Ds is the density of water at the appropriate temperature, lbs/gallon.
9.3.1.2 Computation Heat output is computed using the

following: H o = MC pi (T del - T in ) + V st D n C p2 (T max - T o ) (6) Where H o is heat output, BTU; M is the mass of the water withdrawn, pounds; C pi is the specific heat of water at the average temperature (T del + T in )/2, BTU/pound o F;

T del is average delivery temperature, o F;
T in is average inlet temperature, o F;-46-

V st is storage tank capacity, gallons (Section 9.3.1.1 );
D n is the density of water at the average temperature (T max + T o )/2, pounds/gallon;

C p2 is the specific heat of water at the average temperature (T max + T o )/2, Btu/pound o F;

T max is the maximum mean tank temperature recorded afte r cutout following the test draw, o F;

T o is the maximum mean tank temperature recorded prio r to the test draw, o F.

9.3.2 STORAGE TANK WATER HEATERS WITH INPUT RATINGS ABOVE

75,000 BTU PER HOUR, CIRCULATING, AND INSTANTANEOUS WATER HEATERS, AND POOL HEATERS
Heat output is computed using the following:

H o = Cp avg x (T del - T in ) x V x D i (7)

Where H o is heat output, BTU;

T del is the average delivery temperature, o F; Cp avg is the specific heat of water at (T del + T in )/2, BTU/pound o F;

T in is the average inlet temperature, o F; temperature, BTU/pound o F;
V is the volume of water withdrawn, gallons;-47-

D i is the density of water at the average inlet
temperature, pounds/gallon.

9.3.3 STEAM BOILERS Heat output is computed using the

following:

H o = VD x (H s - H w ) (8)

Where H o is heat output, BTU; V is volume of feed water during test, gallons; D is density of water at average delivery temperat ure, pounds/gallon;

H s is the enthalpy of saturated steam at the average delivery temperature, Tdel; Btu/lb;

H w is the enthalpy of water at the average inlet temperature, Tin; Btu/lb.

9.3.4 HOT WATER BOILERS
Heat output is computed using the following:

H o = Cp avg x (T del - T in ) x V x D i (9)

Where H o is heat output, BTU;

T del is the average delivery temperature, o F; Cp avg is the specific heat of water at (T del + T in )/2. BTU/pound o F;-48-

T in is the average inlet temperature, o F; V is the volume of water withdrawn, gallons; D i is the density of water at the average inlet
temperature, pounds/gallon.

9.4 EMISSION OF NO X
9.4.1 NOx EMISSION (ng/J Heat Output) Compute using the following:

5211 x Cf x P x F N = ——————————————————— (10) Ho x C
Where N is emissions of NO x as NO 2 , nanograms/joule
(output);
P is NO x concentration in flue gas, ppm (vol);
C f is carbon number of fuel, from Section 9.1; F is volume of fuel burned, cubic feet (30 in.Hg, 60 o F); C is concentration of CO 2 measured in flue gas, percent
H o , as determined in Section 9.3.

9.4.2 NOx EMISSION (Concentration at 3% O 2 ) Compute using the following:

20.9 - 3 N = P ———————————— (11) 20.9 - %O2-49-

Where N is emissions of NO x as NO 2 , concentration
corrected to 3% oxygen;
P is NO x concentration in flue gas, ppm (vol);

%O2 is the concentration of oxygen measured in flu e gas, percent. Note that the CO 2 concentration (C) in the flue may be related to %O2 using the followi ng relation: %O2 = 20.9 - 1.75 (C)

9.4.3 NOx EMISSION (lb/MMBtu) Compute using the following:

100 N = 1.194x10 -7 (P)(1040) ————— (12) C
Where N is emissions of NO x as NO 2 , lb/MMBtu (input);
P is NO x concentration in flue gas, ppm (vol);

C is concentration of CO 2 measured in flue gas, percent. The O 2 concentration (%O2) in the flue may be related to (C) using the following relation: C = 0.5713 (20.9 - %O2)-50- 10.0 REPORT

10.1 TEST RESULTS The following forms may be used in reporting test

results:

10.1.1 ENVIRONMENT AND HOT WATER PRODUCTION
Form A. Storage tank water heaters with input rati ng of 75,000 Btu/Hr or less
Form B. Storage tank water heaters with input rati ng above 75,000 Btu/Hr, instantaneous and circulating water heaters, pool heaters, and hot water boilers.

Form C. Steam boilers.

10.1.2 EMISSION MEASUREMENTS
Form D. Appliances with vents less than 12 inches in diameter.
Form E. Appliances with vents 12 inches in diamete r and larger.
Form F. Appliances without vents.-51-

10.1.3 GAS COMPOSITION ANALYSIS
Form G. Gas composition analysis and average carbo n number

10.1.4 ANALYZER CALIBRATION AND SAMPLING SYSTEM BIA S TEST
Form H. Daily sampling system analyzer calibration and bias test

10.1.5 NO 2 CONVERTER EFFICIENCY TEST
Form I. Monthly NO 2 converter efficiency test

10.2 FORMS USED FOR PERFORMING THE CALCULATIONS

10.2.1 CALCULATION OF HEAT OUTPUT
Form J. Storage tank water heaters with input rati ng of

75,000 Btu/hr or less.

Form K. Storage tank water heaters with input rati ng

above 75,000 Btu/Hr, Instantaneous and circulating water heaters, pool heaters, and hot water boilers.

Form L. Steam boilers.-52-

10.2.2 CORRECTION OF GAS METER READING AND DETERMIN ATION OF

FIRING RATE
Form M. Correction of gas meter reading and

determination of firing rate.

10.2.3 CALCULATION OF NO x EMISSIONS

Form N. Calculation of NOx Emissions (ng/J Heat Ou tput)

Form O. Calculation of NOx Emissions (at 3% Oxygen )

Form P. Calculation of NOx Emissions (lb/MMBtu)- 60

-

Run No.: _______________ Date: ____________

Form A. STORAGE TANK WATER HEATERS WITH INPUT RATIN G OF 75,000

BTU/HR OR LESS.

WATER HEATER
Manufacturer __________________; Model No._________ ___; Serial No.____________ Input Rating: ________BTU/HR Water Heater Weight: Full (Wf) _______ ; Empty (Wt ) _______ pounds. Collection Tank: After Draw _______ ; Em pty _______ pounds

S T A R T F I N I S H Ambient Temperature ________ o F ________ o F Relative Humidity ________ % ________ % Barometric Pressure ________ in Hg ________ in Hg Gas Meter Reading ________ cu ft ________ cu ft Gas Pressure ________ in H 2 0 ________ in H 2 0
Gas Temperature ________ o F ________ o F Heating Value of Gas (optional) ________ BTU/Cu.Ft

.

Mean Tank Temperature at Start of Draw (To) ______

__ o F Maximum Mean Temperature Following Draw (Tmax) ___

_____ o F Start Time ________ Burner Cut-In ________ Burner Cut-Out ________

Water Inlet (Tin); Hot Water Delivery (Tdel); Temp erature ( o F).
Min:Sec Tin Tdel Min:Sec Tin Tdel Min:Sec Tin Tdel 0:15 ____ ____ 1:25 ____ ____ 2:35 ____

____ 0:20 ____ ____ 1:30 ____ ____ 2:40 ____

____ 0:25 ____ ____ 1:35 ____ ____ 2:45 ____

____ 0:30 ____ ____ 1:40 ____ ____ 2:50 ____

____ 0:35 ____ ____ 1:45 ____ ____ 2:55 ____

____ 0:40 ____ ____ 1:50 ____ ____ 3:00 ____

____ 0:45 ____ ____ 1:55 ____ ____ 3:05 ____

____ 0:50 ____ ____ 2:00 ____ ____ 3:10 ____

____ 0:55 ____ ____ 2:05 ____ ____ 3:15 ____

____ 1:00 ____ ____ 2:10 ____ ____ 3:20 ____

____ 1:05 ____ ____ 2:15 ____ ____ 3:25 ____

____ 1:10 ____ ____ 2:20 ____ ____ 3:30 ____

____ 1:15 ____ ____ 2:25 ____ ____ 3:35 ____

____ 1:20 ____ ____ 2:30 ____ ____ 3:40 ____

____-61-

Run No.: _______________ Date: ____________

Form B. STORAGE TANK WATER HEATERS WITH INPUT RATIN GS ABOVE

75,000 BTU/HR, INSTANTANEOUS AND CIRCULATING WATER HEATERS, POOL HEATERS AND HOT WATER BOILERS.

Manufacturer __________________; Model No._________ ___; Serial No.____________ Type ____________; Input Rating: ________BTU/HR

S T A R T F I N I S H Ambient Temperature ________ o F ________ o F Relative Humidity ________ % ________ % Barometric Pressure ________ in Hg ________ in Hg Gas Meter Reading ________ cu ft ________ cu ft Gas Pressure ________ in H 2 0 ________ in H 2 0
Gas Temperature ________ o F ________ o F Water Meter Reading ________ gal ________ gal Heating Value of Gas (optional) ________ BTU/Cu.Ft.

Start Time ________

Water Inlet (T in ); Hot Water Delivery (T del ); Temperature ( o F).

Min:Sec T in T del Min:Sec T in T del Min:Sec T in T del 0:15 ____ ____ 5:15 ____ ____ 10:15 ____ ____ 0:30 ____ ____ 5:30 ____ ____ 10:30 ____ ____ 0:45 ____ ____ 5:45 ____ ____ 10:45 ____ ____ 1:00 ____ ____ 6:00 ____ ____ 11:00 ____ ____ 1:15 ____ ____ 6:15 ____ ____ 11:15 ____ ____ 1:30 ____ ____ 6:30 ____ ____ 11:30 ____ ____ 1:45 ____ ____ 6:45 ____ ____ 11:45 ____ ____ 2:00 ____ ____ 7:00 ____ ____ 12:00 ____ ____ 2:15 ____ ____ 7:15 ____ ____ 12:15 ____ ____ 2:30 ____ ____ 7:30 ____ ____ 12:30 ____ ____ 2:45 ____ ____ 7:45 ____ ____ 12:45 ____ ____ 3:00 ____ ____ 8:00 ____ ____ 13:00 ____ ____ 3:15 ____ ____ 8:15 ____ ____ 13:15 ____ ____ 3:30 ____ ____ 8:30 ____ ____ 13:30 ____ ____ 3:45 ____ ____ 8:45 ____ ____ 13:45 ____ ____ 4:00 ____ ____ 9:00 ____ ____ 14:00 ____ ____ 4:15 ____ ____ 9:15 ____ ____ 14:15 ____ ____ 4:30 ____ ____ 9:30 ____ ____ 14:30 ____ ____ 4:45 ____ ____ 9:45 ____ ____ 14:45 ____ ____ 5:00 ____ ____ 10:00 ____ ____ 15:00 ____ ____-62-

Run No.: _______________ Date: ____________

Form C. STEAM BOILERS (Page 1 of 2)

STEAM BOILER Manufacturer __________________; Model No._________ ___; Serial No.____________ Input Rating: ________BTU/HR

S T A R T F I N I S H Ambient Temperature ________ o F ________ o F Relative Humidity ________ % ________ % Barometric Pressure ________ in Hg ________ in Hg Gas Meter Reading ________ cu ft ________ cu ft Gas Pressure ________ in H 2 0 ________ in H 2 0
Gas Temperature ________ o F ________ o F Water Meter Reading ________ gal ________ gal Steam Drum Pressure ________ psig ________ psig Manifold Pressure ________ in H 2 0 ________ in H 2 0

Heating Value of Gas (optional) ________ BTU/Cu.Ft. Start Time ________

Record inlet and outlet temperatures on Page 2.-63-

Run No.: _______________ Date: ____________
Form C. STEAM BOILERS (Page 2 of 2)

Water Inlet (T in ); Steam Delivery (T del ); Temperature ( o F).

Min:Sec T in T del Min:Sec T in T del Min:Sec T in T del 0:15 ____ ____ 10:15 ____ ____ 20:15 ____ ____ 0:30 ____ ____ 10:30 ____ ____ 20:30 ____ ____ 0:45 ____ ____ 10:45 ____ ____ 20:45 ____ ____ 1:00 ____ ____ 11:00 ____ ____ 21:00 ____ ____ 1:15 ____ ____ 11:15 ____ ____ 21:15 ____ ____ 1:30 ____ ____ 11:30 ____ ____ 21:30 ____ ____ 1:45 ____ ____ 11:45 ____ ____ 21:45 ____ ____ 2:00 ____ ____ 12:00 ____ ____ 22:00 ____ ____ 2:15 ____ ____ 12:15 ____ ____ 22:15 ____ ____ 2:30 ____ ____ 12:30 ____ ____ 22:30 ____ ____ 2:45 ____ ____ 12:45 ____ ____ 22:45 ____ ____ 3:00 ____ ____ 13:00 ____ ____ 23:00 ____ ____ 3:15 ____ ____ 13:15 ____ ____ 23:15 ____ ____ 3:30 ____ ____ 13:30 ____ ____ 23:30 ____ ____ 3:45 ____ ____ 13:45 ____ ____ 23:45 ____ ____ 4:00 ____ ____ 14:00 ____ ____ 24:00 ____ ____ 4:15 ____ ____ 14:15 ____ ____ 24:15 ____ ____ 4:30 ____ ____ 14:30 ____ ____ 24:30 ____ ____ 4:45 ____ ____ 14:45 ____ ____ 24:45 ____ ____ 5:00 ____ ____ 15:00 ____ ____ 25:00 ____ ____ 5:15 ____ ____ 15:15 ____ ____ 25:15 ____ ____ 5:30 ____ ____ 15:30 ____ ____ 25:30 ____ ____ 5:45 ____ ____ 15:45 ____ ____ 25:45 ____ ____ 6:00 ____ ____ 16:00 ____ ____ 26:00 ____ ____ 6:15 ____ ____ 16:15 ____ ____ 26:15 ____ ____ 6:30 ____ ____ 16:30 ____ ____ 26:30 ____ ____ 6:45 ____ ____ 16:45 ____ ____ 26:45 ____ ____ 7:00 ____ ____ 17:00 ____ ____ 27:00 ____ ____ 7:15 ____ ____ 17:15 ____ ____ 27:15 ____ ____ 7:30 ____ ____ 17:30 ____ ____ 27:30 ____ ____ 7:45 ____ ____ 17:45 ____ ____ 27:45 ____ ____ 8:00 ____ ____ 18:00 ____ ____ 28:00 ____ ____ 8:15 ____ ____ 18:15 ____ ____ 28:15 ____ ____ 8:30 ____ ____ 18:30 ____ ____ 28:30 ____ ____ 8:45 ____ ____ 18:45 ____ ____ 28:45 ____ ____ 9:00 ____ ____ 19:00 ____ ____ 29:00 ____ ____ 9:15 ____ ____ 19:15 ____ ____ 29:15 ____ ____ 9:30 ____ ____ 19:30 ____ ____ 29:30 ____ ____ 9:45 ____ ____ 19:45 ____ ____ 29:45 ____ ____ 10:00 ____ ____ 20:00 ____ ____ 30:00 ____ ____-64-

Run No.: _______________ Date: ____________

Form D. EMISSION MEASUREMENTS - Appliances with ven ts less than 12

inches in diameter.

Type ___________________; Manufacturer __________ ___________; Model No.________________; Serial No. ____________ ___________.

Z E R O G A S S P A N G A S ANALYZERS Manufacturer Model Serial No. Val ue Reading Value Reading CO 2 (O 2 ) ___________ _____ _________ _____ __

_____ _____ _______ NOx ___________ _____ _________ ___

__ _______ _____ _______ CO ___________ _____ _________ ___

__ _______ _____ _______

CONCENTRATION MEASUREMENTS CO 2 (or O 2 ) - %; NOx - ppm; CO - ppm

CO 2 /O 2 NO X CO Last minute before cut-out or end of test _____ _____ ____

Next to last minute _____ _____ ____

Preceding minute _____ _____ ____-65-

Run No.: _______________ Date: ____________

Form E. EMISSION MEASUREMENTS - Appliances with vents 12 inches in

diameter and larger.

Type_________; Manufacturer____________; Model No._ _______; Serial No.________

Z E R O G A S S P A N G A S ANALYZERS Manufacturer Model Serial No. Val ue Reading Value Reading CO 2 (or O 2 ) ___________ _____ _________ _____ _____

__ _____ _______ NO X ___________ _____ _________ _____ _______ _____ _______ CO ___________ _____ _________ ___

__ _______ _____ _______

CONCENTRATION MEASUREMENTS CO 2 (or O 2 ) - %; NO X - ppm; CO - ppm

Point CO 2 /O 2 NO X CO Point CO 2 NO X CO 1 ____ ____ ____ 9 __

___ _____ ____ 2 ____ ____ ____ 10 __

___ _____ ____ 3 ____ ____ ____ 11 __

___ _____ ____ 4 ____ ____ ____ 12 __

___ _____ ____ 5 ____ ____ ____ 13 __

___ _____ ____ 6 ____ ____ ____ 14 __

___ _____ ____ 7 ____ ____ ____ 15 __

___ _____ ____ 8 ____ ____ ____ 16 __

___ _____ ____

Circle the eight highest CO 2 concentrations.

Traverse Points Ref: 6.3.1.2-66-

Run No.: _______________ Date: ____________

Form F. APPLIANCES WITHOUT VENTS

Type_________; Manufacturer____________; Model No._ _______; Serial No.________

Z E R O G A S S P A N G A S ANALYZERS Manufacturer Model Serial No. Val ue Reading Value Reading CO 2 (or O 2 ) ___________ _____ _________ _____ _____

__ _____ _______ NO X ___________ _____ _________ _____ _______ _____ _______ CO ___________ _____ _________ ___

__ _______ _____ _______

CONCENTRATION MEASUREMENTS CO 2 (or O2) - %; NO X - ppm; CO - ppm

Point CO 2 /O 2 NO X CO Point CO 2 NO X CO 1 ____ ____ ____ 9 __

___ _____ ____ 2 ____ ____ ____ 10 __

___ _____ ____ 3 ____ ____ ____ 11 __

___ _____ ____ 4 ____ ____ ____ 12 __

___ _____ ____ 5 ____ ____ ____ 13 __

___ _____ ____ 6 ____ ____ ____ 14 __

___ _____ ____ 7 ____ ____ ____ 15 __

___ _____ ____ 8 ____ ____ ____ 16 __

___ _____ ____

Circle the eight highest CO 2 concentrations.

Traverse Points Ref: 6.3.1.2-67- Run No.: _______________ Date of Run: _____________

____ Date of Analysis: ____________

Form G. GAS COMPOSITION ANALYSIS

ANALYZER: Manufacturer______________; Model No.____ _____; Serial No.__________ Heating Value Measurement if Performed: Measured Heating Value: _____________ Cf based on Heating Value (from Section 9.1): _____

_________ Gas Chromatograph Analysis if Performed:

S p a n G a s S a m p l e R e a d i n g COMPONENT Value Reading #1 #2 #3 Average
Ethane (C2) _____% _______% _____% _____% _____% __ _____% Propane (C3) _____% _______% _____% _____% _____% _ ______%
Butane+ (C4) _____% _______% _____% _____% _____% _ ______% Nitrogen (I) _____% _______% _____% _____% _____% _ ______%
Carbon Dioxide (Co) _____% _______% _____% _____% _____% _ ______%
TOTAL _____% _____% _____% _______%
Methane (C1) (100%-Total) _____% _____% _____% ____ ___%

Cf CALCULATION
1. Methane Contribution C1/100.0 __________ 2. Ethane Contribution C2/50.0 __________ 3. Propane Contribution C3/33.33 __________ 4. Butane Contribution C4/25.0 __________ 5. CO 2 Contribution C0/100.0 __________ 6. Total is Cf __________-68- Date: _________________

Form H. CALIBRATION CHECK AND SAMPLING SYSTEM BIAS TEST. Must be

conducted before and after each day of testing. (Page 1 of 2)

START OF DAY Time: ______________
Analyzer Response System Respons e BIAS Value CO 2 * NOx CO CO 2 * NOx CO % of Range
Zero Gas _____ ___ ___ ___ ___ ___ __

_ __________ CO 2 * Span _____ ___ X X ___ X X

__________ NOx Span _____ X ___ X X ___ X

__________ CO Span _____ X X ___ X X __

_ __________

END OF DAY Time: ______________

Analyzer Response System Respons e BIAS Value CO 2 * NOx CO CO 2 * NOx CO % of Range
Zero Gas _____ ___ ___ ___ ___ ___ __

_ __________ CO 2 * Span _____ ___ X X ___ X X

__________ NOx Span _____ X ___ X X ___ X

__________ CO Span _____ X X ___ X X __

_ __________ DRIFT (% of range) Zero ________ CO 2 *

________ * CO 2 or O 2 Analyzer NOx ________ CO ________
If system bias and/or drift for the CO 2 , O 2 , or NOx analysis exceeds the ranges specified in this protocol, all tests fo r the day are void.-69- Date: _________________

Form H. CALIBRATION CHECK AND SAMPLING SYSTEM BIAS TEST.

Must be conducted before and after each day of test ing (Page 2 of 2)

Analyzer:
Range:

Cylinder Value (Indicate Units) Analyzer

Calibration Response (Indicate Units) Absolute

Difference (Indicate Units) Difference

(Percent of Range)

Zero Gas

Mid-Range Gas

High-Range Gas

Linearity Error percent range-70- Date: _________________

Form I. NO 2 CONVERTER EFFICIENCY TEST. Must be performed

monthly.

ANALYZER CALIBRATION Analyzer Value Reading
Zero Gas _______ ________ Span Gas _______ ________

CONVERTER TEST Time Analyzer Reading
Start _______ ________ Max Reading _______ ________ Finish _______ ________

If final analyzer reading is more than 2.0% less th an the maximum analyzer reading, the converter must be rep aired or replaced.-71-

Run No.: _______________ Date: ____________

Form J. CALCULATION OF HEAT OUTPUT - STORAGE TANK W ATER HEATERS WITH INPUT RATING OF 75,000 BTU/HR OR LESS (Page 1 of 2) .

A. STORAGE TANK CAPACITY 1. Wf, weight of water heater filled with water (Form A) _______ pounds 2. Wt, weight of empty water heater (Form A) _____ __ pounds 3. Ds, density of water at the temperature weighted * _______ pounds/gal
4. Vst, storage tank capacity is: Vst = (Wf - Wt) / Ds Substituting the corresponding line numbers gives: (1 - 2)/3 _______ gallons

B. HEAT OUTPUT 5. Weight of collection tank and water at end of test (Form A) _______ pounds 6. Tare weight of collection tank (Form A) _______ pounds 7. M, mass of water withdrawn (lines 5-6) _______ pounds 8. Tdel, average delivery temperature, sum of all outlet temperatures on Form A divided by number of measurements _______ o F 9. Tin, average inlet temperature, sum of all inlet temperatures on Form A divided by number of measurements _______ o F 10. Average of inlet and outlet temperature is (Tdel + Tin)/2.0 substituting the corresponding line numbers gives (8 + 9)/2.0 _______ o F

* The values of these parameters may be found in ha ndbooks such as Perry's Chemical Engineers Handbook. Use correct u nits.-72-

11. Cpi, specific heat of water at temperature in line 10* _______ BTU/lb o F 12. Tmax, maximum mean tank temperature after cut-out (Form A) _______ o F 13. To, initial mean tank temperature (Form A)

_______ o F
14. Average tank temperature is (Tmax + To)/2 ____

___ o F 15. Dn, density of water at the temperature in line 14. * _______ lb/gal 16. Cp2, specific heat of water at the temperature in line 14. * _______ BTU/lb o F 17. Ho, heat output is Ho = M x Cpi x (Tdel-Tin) + Vst x Dn x Cp2 x (Tma x-To), substituting the corresponding line numbers gives : Ho = 7 x 11 x (8-9) + 4 x 15 x 16 x (12-13) ____ ___ BTU

* The values of these parameters may be found in ha ndbooks such as Perry's Chemical Engineers Handbook. Use correct u nits.-73- Run No.: _______________ Date: ____________

Form K. CALCULATION OF HEAT OUTPUT - Storage Tank W ater Heaters With Input

Rating Above 75,000 BTU/HR, Instantaneous and Circu lating Water Heaters, Pool Heaters and Hot Water Boilers.

A. HEAT OUTPUT 1. Tdel, average delivery temperature, sum of all delivery temperatures in Form B divided by number of measurements (60 if 15 min. test) ___

____ o F
2. Tin, average inlet temperature, sum of all inlet temperatures in Form B divided by number of measurements (60 if 15 min. test) ___

____ o F

3. Tavg, (Tdel + Tin) / 2 _______ o F
4. Cp avg , specific heat of water at the temperature in line 3.* _______ BTU/lb o F
5. V, volume of water withdrawn, final water meter reading - initial water meter reading (Form B) _______ gallons
6. Di, density of water at the average inlet temperature (line 2)* _______ lbs/gal
7. Ho, heat output is: Ho= Cp avg x (Tdel - Tin) x V x Di substituting the corresponding line number gives: 4 x (1 - 2) x 5 x 6 _______ BTU

* The values of these parameters may be found in ha ndbooks such as Perry's Chemical Engineers Handbook. Use correct u nits.-74- Run No.: _______________ Date: ____________

Form L. CALCULATION OF HEAT OUTPUT - STEAM BOILERS.

A. HEAT OUTPUT - STEAM BOILERS 1. V, volume of feed water during test, final water meter reading - initial water meter reading (Form B) _______ gallons 2. Tdel, average delivery temperature, sum of all delivery temperatures in Form C divided by number of measurements (120 if 30 minute test) _______ o F 3. Tin, average inlet temperature, sum of all inlet temperatures in Form C divided by number of measurements(120 if 30 min.test) ______

_ o F 4. Hs, enthalpy of saturated steam at the average delivery temperature, line 2*. ______ _ BTU/lb 5. Hw, the enthalpy of water at the average inlet temperature, line 3*. _______ BTU/ lb 6. D, density of water at the average inlet temperature (line 3)* _______ lbs/gal
7. Ho, heat output is: Ho= V x D x (Hs - Hw) substituting the corresponding line number gives: 1 x 6 x (4 - 5) _______ BTU

* The values of these parameters may be found in ha ndbooks such as Perry's Chemical Engineers Handbook. Use correct u nits.-75- Run No.: _______________ Date: ____________

Form M. CORRECTION OF GAS METER READING AND DETERMI NATION OF FIRING

RATE

A. CORRECTION OF GAS METER READING 1. Final Gas Meter Reading (Form A, B, or C) _____ __ cu.ft. 2. Initial Gas Meter Reading (Form A, B, or C) ___ ____ cu.ft. 3. Uncorrected Volume of Gas Burned (Line 1 - Line 2) _______ cu.ft. 4. Gas Pressure (Form A, B, or C)* _______ in H 2 0 5. Barometric Pressure (Form A, B, or C) _______ in Hg 6. Pressure Correction to 30 in Hg is ((Line 5 + (Line 4 / 13.57)) / 30.0 _______ N o Units
7. Gas Temperature (Form A, B, or C)* _______ o F 8. Temperature Correction to 60 o F is: 519.7 / (Line 7 + 459.7) _______ No Units 9. Meter Correction Factor (from Meter Calibration Curves) _______ No Units 10. Corrected Volume of Gas Burned (Line 3 x Line 6 x Line 8 x Line 9) _______ cu.f t.

B. FIRING RATE 11. Time of Burner Operation From Form A,B, or C _ ______ minutes 12. Heating Value of Fuel from Form A, B, or C, or compute using equations in Section 9.2 _______ B TU 13. Firing Rate Line 12 x Line 10 x (60/Line 11) _______ BTU/HR

* If initial and final values are different, record the average.-76- Run No.: _______________ Date: ____________

Form N. CALCULATION OF NOx EMISSIONS (ng/J Heat Out put Basis)

1. Cf, average carbon number of fuel (Form G) ____ ___ No Units
2. C, percent of CO 2 measured. If an integrating sample probe was used, the percent CO 2 is the average of the three measurements from Form D. If a traverse was required, the percent CO 2 is the average of the eight highest readings recorded in Form E or F. _______ % 3. P, is part per million NOx measured. Use the average of the NOx readings from the sample points which were used to determine the average CO 2 reading in Line 2. _______ ppm

4. F is the corrected fuel burned (Form M) ______ _ cu.ft.

5. Ho is the heat output (Form J, K, or L) ______ _ BTU

6. N is the NOx emissions 5211 x Cf x P x F N = ————————————————— Ho x C Substituting the corresponding line numbers gives 5211.0 x 1 x 3 x 4/(5 x 2) _______ nanograms per joule-77- Run No.: _______________ Date: ____________
Form O. CALCULATION OF NOx EMISSIONS (Corrected to 3% Oxygen)
1. C, percent of CO 2 measured. If an integrating sample probe was used, the percent CO 2 is the average of the three measurements from Form D. If a traverse was required, the percent CO 2 is the average of the eight highest readings recorded in Form E or F. _______ % 2. %O2, percent of O 2 measured. If an integrating sample probe was used, the percent O 2 is the average of the three measurements from Form D. If a traverse was required, the percent O 2 is the average of the eight lowest readings recorded in Form E or F. If %O2 is calculated from CO 2 measurements, use the following equation: %O2 = 20.9 - 1.75 (C) where C is the reading from Line 1 _______ % 3. P, is part per million NOx measured. Use the average of the NOx readings from the sample points which were used to determine the average CO 2 reading in Line 2. _______ ppm

4. N is the NOx emissions Corrected to 3% Oxygen 20.9 - 3 N = P x ———————————— 20.9 - %O2 Substituting the corresponding line numbers gives (Line 3) x (17.9)/(20.9 - Line 2) _______ ppm @ 3% oxygen-78- Run No.: _______________ Date: ____________

Form P. CALCULATION OF NOx EMISSIONS (lb/MMBtu)

1. C, percent of CO 2 measured. If an integrating sample probe was used, the percent CO 2 is the average of the three measurements from Form D. If a traverse was required, the percent CO 2 is the average of the eight highest readings recorded in Form E or F. If C is calculated from O 2 measurements, use the following equation: %CO2 = 0.5713 (20.9 - %O2) where %O2 is the averaged reading from Form O, Line 2. _______ % 2. P, is part per million NOx measured. Use the average of the NOx readings from the sample points which were used to determine the average CO 2 (or O 2 ) reading in Line 2. _______ ppm

3. N is the NOx emissions 100 N = 1.194x10 -7 (P)(1040) ————— C Substituting the corresponding line numbers gives 0.01242 (Line 2/ Line 1) _______ lb/MMBtuAPPENDIX A SCAQMD METHOD 100.1

Method 100.1 can be found at this location: http://www.aqmd.gov/tao/methods/stm/stm-100-1.pdf

### APPENDIX B

NO 2 to NO Conversion EfficiencyNO 2 to NO Conversion Efficiency

Add gas from the mid-level NO in N 2 calibration gas cylinder to a clean, evacuated, leak-tight Tedlar bag. Dilute this gas approximately 1:1 with 20.9 percent O 2 purified air. Immediately attach the bag outlet to the calibratio n valve assemble and begin operation of the sampling system . Operate the sampling system, recording the NO x response, for at least 30 minutes. If the NO 2 to NO conversion is 100 percent, the instrument response will be stable at the highest p eak value observed. If the response at the end of 30 minutes decreases more than 2.0 percent of the highest peak value, th e system is not acceptable and corrections must be made before repeating the check.