STACK EMISSIONS MONITORING REPORT

Transcription

1 STACK EMISSIONS MONITORING REPORT Unit 5 Crown Industrial Estate Kenwood Road Stockport SK5 6PH Tel: Fax: Your contact at ESG Andrew Palliser Business Manager Tel: andrew.palliser@esg.co.uk Operator & Address: Dowding Road Lincoln Lincolnshire LN3 4PQ Permit: Release Point: Sampling Date(s): ESG Job Number: Report Date: LNO th September 2013 Version: 1 Report By: Johnathon Orley MCERTS Number: MM MCERTS Level: MCERTS Level 2 Team Leader Technical Endorsements: 1, 2, 3 & 4 Report Approved By: Mark Woodruff MCERTS Number: MM Business Title: MCERTS Level 2 Team Leader Technical Endorsements: 1, 2, 3 & 4 Signature: Report Template Issue 15 (Aug 13) Page 1 of 25

2 CONTENTS EXECUTIVE SUMMARY Stack Emissions Monitoring Objectives Plant Operator Stack Emissions Monitoring Test House Emissions Summary Monitoring Times Process Details Monitoring Methods Analytical Methods Sampling Methods with Subsequent Analysis OnSite Testing Sampling Location Sampling Plane Validation Criteria Duct Characteristics Sampling Lines & Sample Points Sampling Platform Sampling Location / Platform Improvement Recommendations Sampling and Analytical Method Deviations APPENDICES APPENDIX 1 Monitoring Schedule, Calibration Checklist & Monitoring Team APPENDIX 2 Summaries, Calculations, Raw Data and Charts APPENDIX 3 Measurement Uncertainty Budget Calculations APPENDIX 4 Record of Amendments (if applicable) Page 2 of 25

3 EXECUTIVE SUMMARY Stack Emissions Monitoring Objectives operates a roadstone coating process at which is subject to Defra Process Guidance Note PG 3/15 (12), under the Environmental Permitting Regulations Environmental Scientifics Group Limited were commissioned by to carry out stack emissions monitoring to determine the release of prescribed pollutants from the following Plant under normal operating conditions. The results of these tests shall be used to demonstrate compliance with a set of emission limit values for prescribed pollutants as specified in the Plant's Defra Process Guidance Note, PG 3/15 (12). Plant Operator Dowding Road Lincoln Lincolnshire LN3 4PQ Stack Emissions Monitoring Test House Environmental Scientifics Group Limited Stockport Laboratory Unit 5 Crown Industrial Estate Kenwood Road Stockport SK5 6PH UKAS and MCERTS Accreditation Number: 1015 Opinions and interpretations expressed herein are outside the scope of UKAS accreditation. MCERTS accredited results will only be claimed where both the sampling and analytical stages are UKAS accredited. This test report shall not be reproduced, except in full, without written approval of Environmental Scientifics Group Limited. Page 3 of 25

4 EXECUTIVE SUMMARY Emissions Summary Parameter Units Result Calculated Uncertainty +/ Total Particulate Matter mg/m³ Particulate Emission Rate g/hr Moisture % P Stack Gas Temperature o C 74 Stack Gas Velocity m/s 20.6 Gas Volumetric Flow Rate (Actual) m³/hr Gas Volumetric Flow Rate (STP, Wet) m³/hr P Gas Volumetric Flow Rate (STP, Dry) m³/hr Gas Volumetric Flow Rate at Reference Conditions m³/hr ND = None Detected, Results at or below the limit of detection are highlighted by bold italic text. The above volumetric flow rate is calculated using data from the preliminary survey. Mass emissions for non isokinetic tests are calculated using these values. For all isokinetic testing the mass emission is calculated using test specific flow data and not the above values. Reference conditions are 273K, 101.3kPa without correction for water vapour Limit MCERTS accredited result P Page 4 of 25

5 EXECUTIVE SUMMARY Monitoring Times Parameter Sampling Date(s) Sampling Times Sampling Duration Total Particulate Matter Run 1 Total Particulate Matter Run 2 Stack Gas Flow Rate & Temperature Run 1 19 September :00 08:32 32 minutes 19 September :56 09:28 32 minutes 19 September :30 Page 5 of 25

6 EXECUTIVE SUMMARY Process Details Parameter Description of process Continuous or batch Product Details Part of batch to be monitored (if applicable) Normal load, throughput or continuous rating Fuel used during monitoring Abatement Plume Appearance Process Details Roadstone coating Batch N/A N/A 55 Tonnes / Hour Kerosine Bag Filter Moderate steam plume visible Page 6 of 25

7 EXECUTIVE SUMMARY Monitoring Methods The selection of standard reference / alternative methods employed by Environmental Scientifics Group Limited is determined, wherever possible by the hierarchy of method selection outlined in Environment Agency Technical Guidance Note (Monitoring) M2. i.e. CEN, ISO, BS, US EPA etc. MONITORING METHODS Species Method ESG UKAS Lab MCERTS Limit of Calculated Standard Reference Method / Technical Number Accredited Detection MU Alternative Method Procedure Method (LOD) +/ % TPM SRM BS EN AE Yes 0.41 mg/m³ 8.2 % H 2 O SRM BS EN AE Yes 0.02% 3.2% Flow Rate / Temp. SRM BS EN AE Yes 5 Pa Page 7 of 25

8 EXECUTIVE SUMMARY Analytical Methods The following tables list the analytical methods employed together with the custody and archiving details: SAMPLING METHODS WITH SUBSEQUENT ANALYSIS Species Analytical Technique Analytical UKAS Lab UKAS Analysis Lab Sample Archive Procedure Number Accredited Lab (ESG or Archive Period Analysis Subcontract) Location TPM Gravimetric AE Yes ESG Stockport ESG Stockport 3 months ONSITE TESTING Species Analytical Technique Analytical UKAS Lab MCERTS Laboratory Data Archive Procedure Number Accredited Archive Period Analysis Location H 2 O Gravimetric AE Yes ESG Stockport Page 8 of 25

9 EXECUTIVE SUMMARY Sampling Location Sampling Plane Validation Criteria Value Units Requirement Compliant Method Lowest Differential Pressure 284 Pa >= 5 Pa Yes BS EN Lowest Gas Velocity 20.3 m/s Highest Gas Velocity 20.9 m/s Ratio of Gas Velocities 1.03 : 1 < 3 : 1 Yes BS EN Mean Velocity 20.6 m/s Maximum angle of flow with regard to duct axis 5 o < 15 o Yes BS EN No local negative flow Yes Yes BS EN Duct Characteristics Sampling Lines & Sample Points Value Units Isokinetic Isokinetic NonIso & Shape Circular (CEN Methods) (ISO Methods) Gases Depth 0.60 m Sample port size 4 Inch BSP Width m Number of lines used 1 Area 0.28 m 2 Number of points / line 4 Port Depth 90 mm Duct orientation Vertical Filtration for TPM In Stack Sampling Platform General Platform Information Permanent / Temporary Platform / Ground level / Floor Level / Roof Inside / Outside Permanent Outside M1 Platform requirements Is there a sufficient working area so work can be performed in a compliant manner Platform has 2 levels of handrails (approximately 0.5 m & 1.0 m high) Platform has vertical base boards (approximately 0.25 m high) Platform has removable chains / self closing gates at the top of ladders Handrail / obstructions do not hamper insertion of sampling equipment Depth of Platform = Minimum of 2m or Probe Length + 1m Yes Yes Yes Yes Yes Yes Sampling Platform Improvement Recommendations (if applicable) The sampling location meets all the requirements as specified in EA Guidance Note M1. Page 9 of 25

10 EXECUTIVE SUMMARY Sampling & Analytical Method Deviations Sampling Lines Only one sampling line was available due to siezed port cap. The number of points were doubled along the remaining line Nozzle Size Due to the relatively high velocity in the stack a nozzle less than the required 6mm was used. Page 10 of 25

11 APPENDICES CONTENTS APPENDIX 1 Monitoring Schedule, Calibration Checklist & Monitoring Team APPENDIX 2 Summaries, Calculations, Raw Data and Charts APPENDIX 3 Measurement Uncertainty Budget Calculations Page 11 of 25

12 APPENDIX 1 Monitoring Schedule, Calibration Checklist & Monitoring Team MONITORING SCHEDULE Species Method ESG UKAS Lab MCERTS Number of Standard Reference Method / Technical Number Accredited Samples Alternative Method Procedure Method TPM SRM BS EN AE Yes 2 H 2 O SRM BS EN AE Yes 2 Flow Rate / Temp. SRM BS EN AE Yes 1 Page 12 of 25

13 Extractive Sampling APPENDIX 1 Monitoring Schedule, Calibration Checklist & Monitoring Team CALIBRATEABLE EQUIPMENT CHECKLIST Instrumental Analyser/s Miscellaneous Equipment Equipment I.D. Equipment Equipment I.D. Equipment Equipment I.D. Control Box DGM LNO 1308 Horiba PG250 Analyser Laboratory Balance LNO 2701/2702 Box Thermocouples LNO 0308 FTIR Tape Measure LNO 24JO Meter In Thermocouple LNO 0308 FTIR Oven Box Stopwatch LNO 17JO Meter Out Thermocouple LNO 0308 Bernath 3006 FID Protractor LNO 23JO Control Box Timer LNO 1708 Signal 3030 FID Barometer LNO 08JO Oven Box Servomex Digital Micromanometer LNO 01JO Probe LNO 1122 JCT Heated Head Filter Digital Temperature Meter LNO 03JO Probe Thermocouple LNO 1022 Thermo FID Stack Thermocouple LNO 10JO Probe Stackmaster Mass Flow Controller Probe Thermocouple FTIR Heater Box for Heated Line MFC Display module SPitot LNO 06JO Anemometer 1m Heated Line (1) LPitot Ecophysics NOx Analyser 1m Heated Line (2) Site Balance LNO 1412 Chiller (JCT/MAK 10) 1m Heated Line (3) Last Impinger Arm 5m Heated Line (1) Dioxins Cond. Thermocouple 10m Heated Line (1) Callipers LNO 31JO 10m Heated Line (2) Small DGM 15m Heated Line (1) Heater Controller 20m Heated Line (1) Inclinometer (Swirl Device) LNO 23JO 20m Heated Line (2) NOTE: If the equipment I.D is represented by a dash (), then this piece of equipment has not been used for this test. Page 13 of 25

14 APPENDIX 1 Monitoring Schedule, Calibration Checklist & Monitoring Team STACK EMISSIONS MONITORING TEAM Team Leader Johnathon Orley MCERTS Level 2, Technical Endorsements 1, 2, 3 & 4 MM MCERTS Expiry Date Mar 2015 H&S Expiry Date Nov 2013 Technician Vic Johnson MCERTS Level 1, Technical Endorsement 1 MM MCERTS Expiry Date Dec 2016 H&S Expiry Date Sep 2015 Page 14 of 25

15 APPENDIX 2 Summaries, Calculations, Raw Data and Charts TOTAL PARTICULATE MATTER SUMMARY Parameter Run 1 Sampling Times 08:00 08:32 19 September 2013 Concentration mg/m³ Uncertainty Limit Emission mg/m³ mg/m³ Rate g/hr Run 2 08:56 09:28 19 September Blank 1.7 Reference conditions are 273K, 101.3kPa without correction for water vapour 11 Acetone Blank Value Acceptable Value mg/l mg/l Samples FILTER INFORMATION Test Filter & Probe Rinse Number Filter Start Weight Filter End Weight Mass Gained on Filter Probe Rinse Start Weight Probe Rinse End Weight Mass Gained on Probe Combined Total Mass Gained g g g g g g g Run 1 G Run 2 G If total mass gained is less than the LOD then the LOD is reported Blanks Test Filter & Probe Number Filter Start Weight Filter End Weight Mass Gained Filter Probe Start Weight Probe End Weight Mass Gained Probe Combined Total Mass Gained g g g g g g g Run 1 G If total mass gained is less than the LOD then the LOD is reported Page 15 of 25

16 APPENDIX 2 Summaries, Calculations, Raw Data and Charts ISOKINETIC SAMPLING EQUATIONS RUN 1 TPM Absolute pressure of stack gas, P s Molecular weight of dry gas, M d Barometric pressure, P b mm Hg CO 2 % 0.03 Stack static pressure, P static mm H 2 O O 2 % P s = P b + (P static ) mm Hg Total % N 2 (100 Total) % Vol. of water vapour collected, V wstd M d = 0.44(%CO 2 )+0.32(%O 2 )+0.28(%N 2 ) Moisture trap weight increase,vlc g 16.4 Molecular weight of wet gas, M s V wstd = ( )(V lc ) m M s = M d (1 B wo ) + 18(B wo ) g/gmol Volume of gas metered dry, V mstd Actual flow of stack gas, Q a Volume of gas sample through gas meter, V m m 3 Area of stack, A s m Gas meter correction factor, Y d Q a = (60)(A s )(V s ) m³/min Mean dry gas meter temperature, T m Mean pressure drop across orifice, DH mmh 2 O o C Total flow of stack gas, Q Conversion factor (K/mm.Hg) V mstd = (0.3592)(V m )(P b +(DH/13.6))(Y d ) m 3 Q std = (Q a )P s (0.3592)(1B wo ) Dry T m (T s ) +273 Volume of gas metered wet, V mstw Q stdo2 = (Q a )P s (0.3592)(1B wo )(O 2 2 ref No O2 Ref V mstw = V mstd + V wstd m (T s ) +273 Vol. of gas metered at O 2 Ref. Cond., V mstd@x%o2 Is the process burning hazardous waste? (If yes, no favourable oxygen correction) Q stw = (Q a )P s (0.3592) Wet No Percent isokinetic, %I (T s ) +273 Nozzle diameter, D n mm 4.90 % oxygen measured in gas stream, act%o Nozzle area, A n mm % oxygen reference condition 21 Total sampling time, q min 32 O 2 Reference O 2 Ref = 21.0 act%o 2 No O2 Ref %I = (4.6398E6)(T s +273)(V mstd ) % 99.5 Factor 21.0 ref%o 2 (P s )(V s )(A n )(q)(1b wo ) V mstd@x%oxygen = (V mstd ) (O 2 Ref ) m 3 No O2 Ref Acceptable isokinetic range 95% to 115% Yes Moisture content, B wo Particulate Concentration, C B wo = V wstd Mass collected on filter, M f g V mstd + V wstd % 3.53 Mass collected in probe, M p g Moisture by FTIR % Total mass collected, M n g Velocity of stack gas, V s C wet = M n mg/m³ Pitot tube velocity constant, K p V mstw Velocity pressure coefficient, C p.84 C dry = M n mg/m³ Mean of velocity heads, DP avg mm H 2 O V mstd Mean square root of velocity heads, DP 5.57 C dry@x%o2 = M n mg/m³ No O2 Ref Mean stack gas temperature, T o s C 80 V mstd@x%oxygen V s = (K p )(C p )( DP)( T s + 273)) m/s Particulate Emission Rates, E (M s )(P s ) E = [(C wet )(Q stw )(60)] / Page 16 of 25

17 APPENDIX 2 Summaries, Calculations, Raw Data and Charts ISOKINETIC SAMPLING EQUATIONS RUN 2 TPM Absolute pressure of stack gas, P s Molecular weight of dry gas, M d Barometric pressure, P b mm Hg CO 2 % 0.03 Stack static pressure, P static mm H 2 O O 2 % P s = P b + (P static ) mm Hg Total % N 2 (100 Total) % Vol. of water vapour collected, V wstd M d = 0.44(%CO 2 )+0.32(%O 2 )+0.28(%N 2 ) Moisture trap weight increase,vlc g 32.2 Molecular weight of wet gas, M s V wstd = ( )(V lc ) m M s = M d (1 B wo ) + 18(B wo ) g/gmol Volume of gas metered dry, V mstd Actual flow of stack gas, Q a Volume of gas sample through gas meter, V m m 3 Area of stack, A s m Gas meter correction factor, Y d Q a = (60)(A s )(V s ) m³/min Mean dry gas meter temperature, T m Mean pressure drop across orifice, DH mmh 2 O o C Total flow of stack gas, Q Conversion factor (K/mm.Hg) V mstd = (0.3592)(V m )(P b +(DH/13.6))(Y d ) m 3 Q std = (Q a )P s (0.3592)(1B wo ) Dry T m (T s ) +273 Volume of gas metered wet, V mstw Q stdo2 = (Q a )P s (0.3592)(1B wo )(O 2 2 ref No O2 Ref V mstw = V mstd + V wstd m (T s ) +273 Vol. of gas metered at O 2 Ref. Cond., V mstd@x%o2 Is the process burning hazardous waste? (If yes, no favourable oxygen correction) Q stw = (Q a )P s (0.3592) Wet (T s ) +273 No Percent isokinetic, %I Nozzle diameter, D n mm 4.90 % oxygen measured in gas stream, act%o 2 21 Nozzle area, A n mm % oxygen reference condition 21 Total sampling time, q min 32 O 2 Reference O 2 Ref = 21.0 act%o 2 No O2 Ref %I = (4.6398E6)(T s +273)(V mstd ) % 97.8 Factor 21.0 ref%o 2 (P s )(V s )(A n )(q)(1b wo ) V mstd@x%oxygen = (V mstd ) (O 2 Ref ) m 3 No O2 Ref Acceptable isokinetic range 95% to 115% Yes Moisture content, B wo Particulate Concentration, C B wo = V wstd Mass collected on filter, M f g V mstd + V wstd % 6.70 Mass collected in probe, M p g Moisture by FTIR % Total mass collected, M n g Velocity of stack gas, V s C wet = M n mg/m³ Pitot tube velocity constant, K p V mstw Velocity pressure coefficient, C p.84 C dry = M n mg/m³ Mean of velocity heads, DP avg mm H 2 O V mstd Mean square root of velocity heads, DP 5.79 C dry@x%o2 = M n mg/m³ No O2 Ref Mean stack gas temperature, T o s C 77 V mstd@x%oxygen V s = (K p )(C p )( DP)( T s + 273)) m/s Particulate Emission Rates, E (M s )(P s ) E = [(C wet )(Q stw )(60)] / Page 17 of 25

18 APPENDIX 2 Summaries, Calculations, Raw Data and Charts TOTAL PARTICULATE MATTER QUALITY ASSURANCE CHECKLIST Leak Rate Run Mean Sampling Rate Presampling Leak Rate Postsampling Leak Rate Maximum Vacuum Acceptable Leak Rate Leak Tests Acceptable? litre/min litre/min litre/min mm Hg litre/min Run Yes Run Yes Isokineticity Run Isokinetic Variation Acceptable Isokineticity Balance Uncertainty % mg/m³ mg/m³ Run Yes Run Yes Run Yes Run Yes Acceptable isokinetic range 95% to 115% The above is based on both the Filter and rinse uncertainty Run Result 5% ELV LOD < 5% ELV Blank Value Run Overall Blank Value Daily Emission Limit Value Acceptable Blank Value Overall Blank Acceptable mg/m 3 mg/m 3 mg/m 3 mg/m 3 Blank Yes Filters Run mm C Run 1 GF Run 2 GF GF = Glass Fibre QF = Quartz Fibre Filter Material Filter Size Max Filtration Temperature Preuse Filter Conditioning Temperature Postuse Filter Conditioning Temperature C C Page 18 of 25

19 APPENDIX 2 Summaries, Calculations, Raw Data and Charts MOISTURE CALCULATIONS Moisture Determination Isokinetic Test Number Sampling Time and Date Start Weight End Weight Total gain Concentration LOD Uncertainty kg kg kg % % % Run 1 08:00 08:32 19 September Run 2 08:56 09:28 19 September Moisture Quality Assurance Test Number Sampling Duration Total Volume Sampled Sampling Rate Start Leak Rate End Leak Rate Acceptable Leak Rate mins l l/min l/min l/min l/min Leak Tests Acceptable? Run Yes Run Yes Stack Characteristics Stack Diameter / Depth, D 0.60 m Stack Width, W m Stack Area, A 0.28 m 2 Average stack gas temperature 74 Stack static pressure 0.16 kpa Barometric Pressure 100 kpa Pitot tube calibration coefficient, K pt 0.85 Stack Gas Composition & Molecular Weights Component Molar Density Conc Dry Volume Dry Conc Conc Wet Volume Wet Conc Mass kg/m 3 Dry Fraction kg/m 3 Wet Fraction kg/m 3 o C M p % Vol r pi % Vol r pi CO O N H 2 O Where: p = M / pi = r x p PRELIMINARY STACK SURVEY Calculation of Stack Gas Densities Determinand Dry Density (STP), P STD Wet Density (STP), P STW Dry Density (Actual), P Actual Average Wet Density (Actual), P ActualW Result Units kg/m 3 kg/m 3 kg/m 3 kg/m 3 Where: P STD = sum of component concentrations, kg/m 3 (not including water vapour) P STW = (P STD + pi of H 2 O) / (1 + (pi of H 2 O / )) P Actual = P STD x (Ts / Ps) x (Pa / Ta) P ActualW = P STW x (Ts / Ps) x (Pa / Ta) Page 19 of 25

20 APPENDIX 2 Summaries, Calculations, Raw Data and Charts PRELIMINARY STACK SURVEY TRAVERSE 1 Date of Survey Time of Survey Velocity Measurement Device: 19 September :30 SType Sampling Line A Traverse Distance DP pt DP pt Temp Velocity O 2 Angle Point into mmh 2 O Pa o C m/s % of Swirl duct (m) Vol o Mean Sampling Line B Traverse Distance DP pt DP pt Temp Velocity O 2 Angle Point into mmh 2 O Pa o C m/s % of Swirl duct (m) Vol o Mean Page 20 of 25

21 APPENDIX 2 Summaries, Calculations, Raw Data and Charts PRELIMINARY STACK SURVEY (CONTINUED) Sampling Plane Validation Criteria EA Technical Guidance Note (Monitoring) M1 Result Units Requirement Compliant Lowest Differential Pressure Pa >= 5 Pa Yes Lowest Gas Velocity 20.3 m/s Highest Gas Velocity 20.9 m/s Ratio of Gas Velocities 1.03 < 3 : 1 Yes Maximum angle of flow with regard to duct axis 5 o < 15 o Yes No local negative flow Yes Yes Other Sampling Method Criteria Result Units Requirement Compliant Mean Velocity 20.6 m/s Standard Deviation of Velocity from Mean 0.95 % < 10% Yes Mean Oxygen % Standard Deviation of Oxygen from Mean % < 15% Homogeneous flow stream / gas velocity Yes Calculation of Stack Gas Velocity, V Velocity at Traverse Point, V = K pt x (1e) * 2 * DP pt / P ActualW ) Where: K pt = Pitot tube calibration coefficient (1e) = Compressibility correction factor, assumed at a constant Average Stack Gas Velocity, Va 20.6 m/s Calculation of Stack Gas Volumetric Flowrate, Q Duct gas flow conditions Actual Reference Units Temperature 74 0 Total Pressure kpa Oxygen % Moisture % o C Gas Volumetric Flowrate Result Units Average Stack Gas Velocity (Va) 20.6 m/s Stack Area (A) 0.28 m 2 Gas Volumetric Flowrate (Actual), Q Actual m 3 /hr Gas Volumetric Flowrate (STP, Wet), Q STP m 3 /hr Gas Volumetric Flowrate (STP, Dry), Q STP,Dry m 3 /hr Gas Volumetric Flowrate (REF), Q Ref m 3 /hr Where: Q Actual = Va x A x 3600 Q STP = Q (Actual) x (Ts / Ta) x (Pa / Ps) x 3600 Q STP,Dry = Q (STP) / (100 (100 / Ma)) x 3600 Q Ref = Q (STP) x ((100 Ma) / (100 Ms)) x ((20.9 O 2 a) / (20.9 O 2 s)) Nomenclature: Ts = Absolute Temperature, Standard Conditions, 273 K Ps = Absolute Pressure, Standard Conditions, kpa Ta = Absolute Temperature, Actual Conditions, K Pa = Absolute Pressure, Actual Conditions, kpa Ma = Water vapour, Actual Conditions, % Vol Ms = Water vapour, Reference Conditions, % Vol O 2 a = Oxygen, Actual Conditions, % Vol O 2 s = Oxygen, Reference Conditions, % Vol Page 21 of 25

22 APPENDIX 2 Summaries, Calculations, Raw Data and Charts STACK DIAGRAM Value Units NonIsokinetic Sampling Stack Depth 0.60 m Sampling Distance Distance into Units Stack Width m Point (% of Depth) Stack Area 0.28 m Sampling Line Isokinetic Sampling CEN Methods Sampling Distance Distance into Swirl Point (% of Depth) Stack (m) o Isokinetic sampling point Isokinetic sampling points not used Non Isokinetic/Gases sampling point SAMPLING LOCATION Page 22 of 25

23 APPENDIX 3 Measurement Uncertainty Budget Calculations MEASUREMENT UNCERTAINTY BUDGET TOTAL PARTICULATE MATTER Run Sampled Volume Sampled Gas Temp Sampled Gas Pressure Sampled Gas Humidity Oxygen Content Limit of Detection Leak Uncollected Mass m³ K kpa % by volume % by volume % by mass % mg MU required < 2% < 2% < 1% < 1% < 10% < 5% of ELV < 2% < 10% of ELV Run N/A 0.24 as a % N/A compliant? Yes Yes Yes Yes N/A Yes Yes Yes Run N/A 0.24 as a % N/A compliant? Yes Yes Yes Yes N/A Yes Yes Yes Run Volume (STP) Mass of particulate O 2 Correction Uncollected Mass m³ mg mg/m³ mg Combined uncertainty Run MU as mg/m MU as % Run MU as mg/m MU as % Leak R1 Uncertainty expressed at a 95% confidence level (where k = 2) R2 Uncertainty expressed at a 95% confidence level (where k = 2) (k is a coverage factor which gives a 95% confidence in the quoted figures) Developed for the STA by R Robinson, NPL 0.89 mg/m³ 7.94 % 0.86 mg/m³ 8.43 % Page 23 of 25

24 Run Sampled Volume Sampled Gas Temp Sampled Gas Pressure Sampled Gas Humidity Oxygen Content m³ K kpa % by volume % by volume % MU required < 2% < 2% < 1% < 1% < 10% < 2% Run N/A as a % N/A 1.06 compliant? Yes Yes Yes Yes N/A Yes Run N/A as a % N/A 1.16 compliant? Yes Yes Yes Yes N/A Yes Run Volume (STP) Mass Gained APPENDIX 3 Measurement Uncertainty Budget Calculations MEASUREMENT UNCERTAINTY BUDGET MOISTURE O 2 Correction Uncollected Mass m³ mg mg/m³ mg Run MU as % v/v MU as % Run MU as % v/v MU as % Leak Leak Combined uncertainty R1 Uncertainty expressed at a 95% confidence level (where k = 2) 0.12 % v/v 3.24 % R2 Uncertainty expressed at a 95% confidence level (where k = 2) 0.21 % v/v 3.05 % Page 24 of 25

25 END OF REPORT Page 25 of 25