STACK EMISSIONS MONITORING REPORT

Transcription

1 STACK EMISSIONS MONITORING REPORT 24 Langlands Place Kelvin South Business Park East Kilbride G75 0YF Tel: Fax: Your contact at David Hay Business Manager North Tel: Job Number: Report Date: Operator & Address: Bay 150 Shannon Industrial Estate Shannon Co Clare Ireland Permit: Release Point: Sampling Date(s): LEK th July 2017 Version: 2 Report By: David Drylie MCERTS Number: MM MCERTS Level: MCERTS Level 2 Team Leader Technical Endorsements: 1, 2, 3 & 4 Report Approved By: David Hay MCERTS Number: MM Business Title: MCERTS Level 2 Business Manager Technical Endorsements: 1, 2, 3 & 4 Signature: Report Template Version 26 Nov 16 Page 1 of 26

2 CONTENTS EXECUTIVE SUMMARY Stack Emissions Monitoring Objectives Plant Operator Stack Emissions Monitoring Test House APPENDICES Emissions Summary Monitoring Times Process Details Monitoring Methods Analytical Methods Sampling Location Sampling Methods with Subsequent Analysis OnSite Testing Sampling Plane Validation Criteria Duct Characteristics Sampling Lines & Sample Points Sampling Platform Sampling Location / Platform Improvement Recommendations Sampling and Analytical Method Deviations 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 Report Amendments Page 2 of 26

3 EXECUTIVE SUMMARY MONITORING OBJECTIVES operates a caqualine 300 or 400 (mixing liquids) process at which is subject to IPPC Licence P007203, under the EU (Industrial Emissions) Regulations were commissioned by Moloney & Associates 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 IPPC Licence, P Plant Operator Bay 150 Shannon Industrial Estate Shannon Co Clare Ireland Stack Emissions Monitoring Test House East Kilbride Laboratory 24 Langlands Place Kelvin South Business Park East Kilbride G75 0YF 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. This test report replaces and supersedes version dated. Please see APPENDIX 4 for the changes made. Page 3 of 26

4 EXECUTIVE SUMMARY EMISSIONS SUMMARY Parameter Units Result Calculated Uncertainty +/ TA Luft Class I mg/m³ TA Luft Class I Emission Rate kg/hr TA Luft Class II mg/m³ TA Luft Class II Emission Rate kg/hr TA Luft Class III mg/m³ TA Luft Class III Emission Rate kg/hr Stack Gas Temperature o C 18 Stack Gas Velocity m/s Gas Volumetric Flow Rate (Actual) m³/hr Gas Volumetric Flow Rate (STP, Wet) m³/hr 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 O O O P Page 4 of 26

5 EXECUTIVE SUMMARY Parameter MONITORING TIMES Sampling Date(s) Sampling Times Sampling Duration 2Methylpropan1ol Run 1 Alphabutyrolactone Run 1 VOC Screening Run 1 14 June June June :50 09:26 08:50 09:26 08:50 09:26 36 minutes 36 minutes 36 minutes Preliminary Stack Traverse 14 June :20 Page 5 of 26

6 EXECUTIVE SUMMARY PROCESS DETAILS Parameter Description of process Continuous or batch Normal load, throughput or continuous rating Fuel used during monitoring Abatement Plume Appearance Process Details CAqualine 300 or 400 (Mixing Liquids) Batch Normal N/A Bag Filter None visible Page 6 of 26

7 EXECUTIVE SUMMARY Monitoring Methods The selection of standard reference / alternative methods employed by is determined, wherever possible by the hierarchy of method selection outlined in Environment Protection Agency Technical Guidance Note (Monitoring) AG2. i.e. CEN, ISO, US EPA etc. Volumetric Flow Rate MONITORING METHODS Species Method UKAS Lab MCERTS Limit of Calculated Standard Reference Method / Technical Number Accredited Detection MU Alternative Method Procedure Method (LOD) +/ % 2Methylpropan1ol SRM EN AE Yes mg/m³ 232.3% Alphabutyrolactone SRM EN AE Yes mg/m³ 232.3% VOC Screening SRM EN AE Yes mg/m³ 232.3% Velocity SRM EN ISO AE Yes 5 Pa 2.3% SRM EN ISO AE Yes 5.1% Page 7 of 26

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 Analysis Lab Sample Archive Procedure Number UKAS Accredited Lab Analysis Archive Period Location 2Methylpropan1ol GCMS ASC (SOP 209) 1015 No Bretby Bretby 8 Weeks Alphabutyrolactone GCMS ASC (SOP 209) 1015 No Bretby Bretby 8 Weeks VOC Screening GCMS ASC (SOP 209) 1015 No Bretby Bretby 8 Weeks ONSITE TESTING Species Analytical Technique Analytical UKAS Lab MCERTS Laboratory Data Archive Procedure Number Accredited Archive Period Analysis Location Page 8 of 26

9 EXECUTIVE SUMMARY SAMPLING LOCATION Sampling Plane Validation Criteria Value Units Requirement Compliant Method Lowest Differential Pressure 177 Pa >= 5 Pa Yes EN Lowest Gas Velocity 15.3 m/s Highest Gas Velocity 19.1 m/s Ratio of Gas Velocities 1.2 : 1 < 3 : 1 Yes EN Mean Velocity 17.2 m/s Maximum angle of flow with regard to duct axis <15 o < 15 o Yes EN No local negative flow Yes Yes EN Shape Circular Value Units Isokinetic Depth 0.67 m Sample port size 4" BSP Width m Number of lines used 1 Area 0.35 m 2 Number of points / line 1 Port Depth 90 mm Duct orientation Vertical General Platform Information Permanent / Temporary Platform / Ground level / Floor Level / Roof Inside / Outside DUCT CHARACTERISTICS AG1 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 SAMPLING PLATFORM Depth of Platform = >Stack depth / diameter + wall and port thickness + 1.5m SAMPLING LINES & POINTS NonIso & Gases Temporary Outside Yes Yes Yes No Yes No Sampling Platform Improvement Recommendations (if applicable) Where possible the sample location should be designed to meet all the requirements as specified in EA Guidance Note AG1. Page 9 of 26

10 EXECUTIVE SUMMARY Sampling & Analytical Method Deviations Accreditation Status ISO 17025/MCERTS accreditation as a whole over the entire test cannot be claimed as lab analysis is not ISO 17025/UKAS accredited for VOC screening. VOC screening using tube analysis is semiquantative analysis i.e. The lab instrument wouldnt be specifically calibrated for each compound so its not a fully quantatative result. The analysis involves the analytes being tentatively identified by mass spectral data and semi quantified against the response of the internal standard (tetradecane). Such analysis can only be semi quantatative since it is not possible to calibrate the lab instrument specifically for the compounds since these are effectively unknowns prior to analysis. On site sampling is however fully ISO / MCERTS accredited. Analyisis for Specific Analytes The analysis for specific analytes (Methylpropan1ol and Alphabutyrolactone were targeted in this case due to their prescence in raw materials) is actually a fully quantatative analysis. The analysis involves solvent extraction (based on recommendations from NIOSH & OSHA methods) and analysis by GCFID against a 5 point calibration of the analytes requested. QCs and blanks run every 10 samples. Analysis is not ISO / UKAS due to the financial restraints as not enough samples are received to make it viable for a commercial lab at this stage. Page 10 of 26

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 26

12 APPENDIX 1 Monitoring Schedule, Calibration Checklist & Monitoring Team Species Method UKAS Lab MCERTS Standard Reference Method / Alternative Method MONITORING SCHEDULE Technical Number Accredited Procedure Method Number of Samples 2Methylpropan1ol SRM EN AE Yes 1 Alphabutyrolactone SRM EN AE Yes 1 VOC Screening SRM EN AE Yes 1 Velocity SRM EN ISO AE Yes 1 Page 12 of 26

13 APPENDIX 1 Monitoring Schedule, Calibration Checklist & Monitoring Team Extractive Sampling CALIBRATEABLE EQUIPMENT CHECKLIST Instrumental Analyser/s Miscellaneous Equipment Equipment I.D. Equipment Equipment I.D. Equipment Equipment I.D. Control Box DGM Box Thermocouples Meter In Thermocouple Meter Out Thermocouple Control Box Timer Oven Box Probe Probe Thermocouple Probe Probe Thermocouple SPitot LPitot Site Balance Last Impinger Arm Dioxins Cond. Thermocouple Callipers Small DGM Heater Controller Inclinometer (Swirl Device) Horiba PG250 Analyser Laboratory Balance FTIR Gasmet Tape Measure LEK 20.7 FTIR Oven Box Stopwatch LEK 17.1 Bernath 3006 FID Protractor Signal 3030 FID Barometer LEK 16.6 Servomex Digital Micromanometer LEK 1.1 JCT Heated Head Filter Digital Temperature Meter LEK 2.12 Thermo FID Stack Thermocouple LEK Stackmaster Mass Flow Controller LEK 29.9 FTIR Heater Box for Heated Line MFC Display module LEK 29.9A / 29.9B LEK 6.21 Anemometer 1m Heated Line (1) Ecophysics NOx Analyser 1m Heated Line (2) Chiller (JCT/MAK 10) 1m Heated Line (3) Heated Line Controller (1) 5m Heated Line (1) Heated Line Controller (2) 10m Heated Line (1) Site temperature Logger 10m Heated Line (2) 15m Heated Line (1) 20m Heated Line (1) LEK m 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. Personnel Hugh Mcmahon MM Shane Thompstone MCERTS Number MM Level Expiry TE1 TE2 TE3 TE4 H&S MCERTS Level 2 Sep20 Feb22 Apr22 Jul22 Feb22 Sep20 MCERTS Level 1 Oct21 Oct21 STACK EMISSIONS MONITORING TEAM MCERTS MONITORING TEAM TE / H&S Qualifications and Expiry Date Page 13 of 26

14 APPENDIX 2 Summaries, Calculations, Raw Data and Charts Test Run 1 Sampling Times 08:50 09:26 14 June METHYLPROPAN1OL SUMMARY Concentration mg/m³ LOD Limit Emission mg/m³ mg/m³ Rate g/hr Field Blank Reference conditions are 273K, 101.3kPa without correction for water vapour 2METHYLPROPAN1OL QUALITY ASSURANCE CHECKLIST Leak Test Results Mean Sampling Rate Pre sampling leak rate Post sampling leak rate Acceptable leak rate l/min l/min l/min l/min Leak Tests Acceptable? Run Yes Run 1 Tube sampling temperature should be < 40 o C Type of tube Charcoal (226 01) Parameter Total Back Adsorption ug ug Efficiency % Run 1 Max. Tube Temperature ND 0 ND Max. Storage / Transit Temp. C C METHYLPROPAN1OL ADSORPTION EFFICIENCY Acceptable Adsorption Efficiency % N/A As the result is less than 30% of the ELV an adsorption efficiency greater than 95% is not required. 95 Adsorption Efficiency Acceptable? ND Page 14 of 26

15 APPENDIX 2 Summaries, Calculations, Raw Data and Charts Test Run 1 ALPHABUTYROLACTONE SUMMARY Sampling Times 08:50 09:26 14 June 2017 Concentration mg/m³ LOD Limit Emission mg/m³ mg/m³ Rate g/hr Field Blank Reference conditions are 273K, 101.3kPa without correction for water vapour ALPHABUTYROLACTONE QUALITY ASSURANCE CHECKLIST Leak Test Results Mean Sampling Rate Pre sampling leak rate Post sampling leak rate Acceptable leak rate l/min l/min l/min l/min Leak Tests Acceptable? Run Yes Run 1 Tube sampling temperature should be < 40 o C Type of tube Charcoal (226 01) Parameter Total Back Adsorption ug ug Efficiency % Run 1 Max. Tube Temperature ND ND ND Max. Storage / Transit Temp. C C ALPHABUTYROLACTONE ADSORPTION EFFICIENCY Acceptable Adsorption Efficiency % 95 Adsorption Efficiency Acceptable? ND Page 15 of 26

16 APPENDIX 2 Summaries, Calculations, Raw Data and Charts Test Run 1 Sampling Times 08:50 09:26 14 June 2017 VOC SCREENING SUMMARY Concentration mg/m³ LOD Limit Emission mg/m³ mg/m³ Rate g/hr Field Blank Reference conditions are 273K, 101.3kPa without correction for water vapour VOC SCREENING RESULTS Substance Other VOCs Total LOD (ug) Run 1 (ug) Run 1 (mg/m 3 ) Mass Emission (g/hr) Front Back Front Back Total Substance Other VOCs Total VOC SCREENING RESULTS BLANK LOD Blank (ug) (ug) (ug) mg/m Page 16 of 26

17 APPENDIX 2 Summaries, Calculations, Raw Data and Charts VOC SCREENING QUALITY ASSURANCE Leak Test Results Mean Sampling Rate Pre sampling leak rate Post sampling leak rate Acceptable leak rate l/min l/min l/min l/min Leak Tests Acceptable? Run Yes Type of tube Max. Tube Max. Storage / Temperature Transit Temp. C C Run 1 Charcoal (226 01) Page 17 of 26

18 PRELIMINARY STACK SURVEY Stack Characteristics Stack Diameter / Depth, D 0.67 m Stack Width, W m Stack Area, A 0.35 m 2 Average stack gas temperature 18 Stack static pressure 0.14 kpa Barometric Pressure kpa o C 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 M p % Vol r pi % Vol r pi CO O N H 2 O Where: p = M / pi = r x p 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 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 / )) Result Units kg/m 3 kg/m 3 kg/m 3 kg/m 3 P Actual = P STD x (Ts / Ps) x (Pa / Ta) P ActualW = P STW x (Ts / Ps) x (Pa / Ta) Page 18 of 26

19 APPENDIX 2 Summaries, Calculations, Raw Data and Charts PRELIMINARY STACK SURVEY TRAVERSE 1 Date of Survey Time of Survey Velocity Measurement Device: 14 June :20 SType Pitot Traverse Distance DP pt DP pt Temp Velocity Volumetric O 2 Angle Point into mmh 2 O Pa o C m/s Flow Rate (actual) % of Swirl duct (m) (average of 3 readings) (average of 3 readings) < < < < < < < < < <15 Mean Traverse Distance DP pt DP pt Temp Velocity Volumetric O 2 Angle Point into mmh 2 O Pa o C m/s Flow Rate (actual) % of Swirl duct (m) (average of 3 readings) (average of 3 readings) Sampling Line A Sampling Line B < < < < < < < < < <15 Mean m³/s m³/s Vol Vol o o PRELIMINARY STACK SURVEY QUALITY ASSURANCE CHECKLIST PITOT LEAK CHECK Pre Traverse Leak Rate Post Traverse Leak Rate Run Start Value End Value Difference Outcome Start Value End Value Difference Outcome Pa Pa % Pa Pa % Run Pass Pass To complete a compliant pitot leak check a pressure of over 80 mmh₂o (or 800 Pa) is applied and the pressure drop monitored over 5 mins. A drop of less than 5% must be observed. Run SType Pitot Stagnation Check Stagnation (Pa) Reference (Pa) Difference (Pa) Outcome (Permitted +/ 10 Pa) Run Pass Page 19 of 26

20 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 176 Pa >= 5 Pa Yes Lowest Gas Velocity 15.3 m/s Highest Gas Velocity 19.1 m/s Ratio of Gas Velocities 1.2 < 3 : 1 Yes Maximum angle of flow with regard to duct axis <15 o < 15 o Yes No local negative flow Yes Yes Calculation of Stack Gas Velocity, V Velocity at Traverse Point, V = K pt x (1e) * Ö(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 17.2 m/s Calculation of Stack Gas Volumetric Flowrate, Q Duct gas flow conditions Actual Reference Units Temperature 18 0 o C Total Pressure kpa Oxygen % Moisture % Pitot tube calibration coefficient, K pt 0.89 Gas Volumetric Flowrate Result Average Stack Gas Velocity (Va) m/s Stack Area (A) 0.35 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 Units 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 20 of 26

21 Value Units Stack Depth 0.67 m Sampling Distance Distance into Units Stack Width m Point (% of Depth) Stack Area 0.35 m 2 A Sampling Line APPENDIX 2 Summaries, Calculations, Raw Data and Charts STACK DIAGRAM Isokinetic Sampling 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 NonIsokinetic/Gases Sampling Page 21 of 26

22 APPENDIX 3 Measurement Uncertainty Budget Calculations MEASUREMENT UNCERTAINTY BUDGET 2METHYLPROPAN1OL 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 as a % N/A compliant? Yes Yes Yes Yes N/A Yes Yes Yes Run Volume (STP) Mass of 2 O2 Correction Leak Uncollected Lab Methylpropan Mass Uncertainty Combined uncertainty m³ mg mg/m³ mg mg Run MU as mg/m MU as % R1 Uncertainty expressed at a 95% confidence level (where k = 2) Developed for the STA by R Robinson, NPL mg/m³ % Page 22 of 26

23 APPENDIX 3 Measurement Uncertainty Budget Calculations MEASUREMENT UNCERTAINTY BUDGET ALPHABUTYROLACTONE 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 as a % N/A compliant? Yes Yes Yes Yes N/A Yes Yes Yes Run Volume (STP) Mass of Alphabutyrolactone O2 Correction Leak Uncollected Lab Mass Uncertainty Combined uncertainty m³ mg mg/m³ mg mg Run MU as mg/m MU as % R1 Uncertainty expressed at a 95% confidence level (where k = 2) Developed for the STA by R Robinson, NPL mg/m³ % Page 23 of 26

24 APPENDIX 3 Measurement Uncertainty Budget Calculations MEASUREMENT UNCERTAINTY BUDGET VOC SCREENING Standard Uncertainty 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 as a % N/A compliant? Yes Yes Yes Yes N/A Yes Yes Yes Run Volume (STP) Mass of Total O2 Correction Leak Uncollected Lab VOC Mass Uncertainty Combined uncertainty m³ mg mg/m³ mg mg Run MU as mg/m MU as % R1 Uncertainty expressed at a 95% confidence level (where k = 2) Developed for the STA by R Robinson, NPL mg/m³ % Page 24 of 26

25 APPENDIX 3 Measurement Uncertainty Budget Calculations MEASUREMENT UNCERTAINTY BUDGET VELOCITY & VOLUMETRIC FLOW RATE Measured Velocity at Actual Conditions Measured Volumetric Flow rate at Actual Conditions 17.2 m/s m³/hr Performance Characteristics & Source of Value Units Values Requirement Compliant Uncertainty of Local Gas Velocity Determination Uncertainty of pitot tube coefficient Uncertainty of mean local dynamic pressures 0.41 Factor loading, function of the number of measurements. 3 readings minimum 3 Yes Range of measurment device pa 1000 Resolution pa 1.00 Calibration uncertainty pa 5.23 Drift % range 0.10 <1% of Value or 20 Pa whichever is greater Linearity % range 0.06 <2% of value Yes Uncertainty of gas density determination Uncertainty of molar mass determination kg/mol Uncertainty of temperature measurement K 1.48 <1% of value Yes Uncertainty of absolute pressure in the duct pa 511 Uncertainty associated with the estimate of density Uncertainty associated with the measurement of local velocity Uncertainty associated with the measurement of mean velocity Measurement Uncertainty Velocity Combined uncertainty Expanded uncertainty at a 95% Confidence Interval Note The expanded uncertainty uses a coverage factor of k = 2. Expanded Measurement Uncertainty of Velocity at a 95% Confidence Interval Expressed as a % of the Measured Concentration Expanded uncertainty at a 95% Confidence Interval m/s % Yes Measurement Uncertainty Volumetric Flow Rate Combined uncertainty Expanded uncertainty at a 95% Confidence Interval Note The expanded uncertainty uses a coverage factor of k = 2. Expanded Measurement Uncertainty of Volumetric Flow Rate at a 95% Confidence Interval Expressed as a % of the Measured Concentration Expanded uncertainty at a 95% Confidence Interval m³/hr % Page 25 of 26

26 Version Issue Date APPENDIX 4 Record of Report Amendments Amendments Change to the Analysis for Specific Analytes on p10 2 1st August 2017 END OF REPORT Thank you for choosing Environmental Scientifics Group for your environmental monitoring needs. We hope our services have met your requirements and that you are fully satisfied with your experience of working with us, we really do value your custom and would welcome your feedback. We would appreciate it if you could take a moment to complete a short online questionnaire so that we can improve our operations and address any areas that have not met with your expectations, by clicking on the following Page 26 of 26