Schedule of Accreditation issued by United Kingdom Accreditation Service 2 Pine Trees, Chertsey Lane, Staines-upon-Thames, TW18 3HR, UK

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1 code Tarapur Qatar Location code Customers sites Dove House Dove Fields Staffordshire ST14 8HU Contact: Dr Gavin Squire Tel: +44 (0) Fax: +44 (0) Website: Calibration performed by the Organisations at the locations specified below Laboratory locations: Locations covered by the organisation and their relevant activities Location details Activity Address Dove House Dove Fields Staffordshire ST14 8HU Local contact Dr Gavin Squire Tel: +44 (0) Fax: +44 (0) Gas Calibration Process Gas Analysers Liquefied Natural Gas (LNG) Analysers Address N-163 MIDC Tarapur Boisar District Palghar Maharashtra India Local contact Padmakar Tillu Tel: +91 (0) Fax: +91 (0) padmakar.tillu@effectech.co.in Gas Calibration Address QP West Support Services Area Ghuwairiya Street IR # 1 Ras Laffan Qatar Local contact Biju Davis Tel: Fax: biju.davis@effectech.com.qa Gas Calibration Site activities performed away from the locations listed above: Location details Activity Customers sites or premises The customers site or premises must be suitable for the nature of the particular calibrations undertaken and will be the subject of contract review arrangements between the laboratory and the customer. Process Gas Analysers Assessment Manager: CA2 Page 1 of 14

2 Uttoxetrer DETAIL OF ACCREDITATION PRIMARY REFERENCE GAS (PRGM) Preparation of synthetic gas mixtures by high-precision gravimetry in accordance with ISO :2015 (Class I mixtures individually verified by analysis) SYNTHETIC NATURAL GAS In-house method TM016/UT carbon dioxide 0.02 to to % relative % relative Preparation of primary reference gas mixtures (PRGM) by ISO :2015 using high precision gravimetry methane 34 to % relative ethane 0.1 to % relative propane 0.05 to % relative iso-butane 0.01 to % relative n-butane 0.01 to % relative neo-pentane to % relative iso-pentane to % relative n-pentane to % relative n-hexane to % relative methylpentane to % relative methylpentane to % relative ,2-dimethylbutane to % relative benzene to % relative cyclohexane to % relative n-heptane to % relative toluene to % relative methylcyclohexane to % relative n-octane to % relative n-nonane to % relative n-decane to % relative helium to % relative hydrogen to % relative Assessment Manager: CA2 Page 2 of 14

3 PRIMARY REFERENCE GAS (PRGM) (continued) SYNTHETIC FUEL GAS In-house method TM016/UT carbon dioxide 0.1 to to % relative % relative Preparation of primary reference gas mixtures (PRGM) by ISO :2015 using high precision gravimetry hydrogen 1 to to % relative carbon monoxide 0.1 to % relative methane 1 to ethane 0.5 to % relative ethene 0.5 to % relative propane 0.1 to 1 1 to % relative propene 0.1 to % relative SULPHUR GAS In-house method TM016/UT matrix gas : methane or hydrogen sulphide carbonyl sulphide 0.2 to to % relative % relative Preparation of primary reference gas mixtures (PRGM) by ISO :2015 using high precision gravimetry carbon disulphide methanethiol (methyl mercaptan) ethanethiol (ethyl mercaptan) dimethyl sulphide 1-propanethiol (n-propyl mercaptan) 2-propanethiol (iso-propyl mercaptan) ethyl methyl sulphide (methyl ethyl sulphide) 1-butanethiol (n-butyl mercaptan) 2-methyl-2-propanethiol (tert-butyl mercaptan) Assessment Manager: CA2 Page 3 of 14

4 PRIMARY REFERENCE GAS (PRGM) (continued) SULPHUR GAS (continued) 2-methyl-1-propanethiol (iso-butyl mercaptan) 1-methyl-1-propanethiol (sec-butyl mercaptan) In-house method TM016/UT matrix gas : methane or (continued) diethyl sulphide n-hexyl mercaptan tetrahydrothiophene (THT) BINARY GAS In-house method TM016/UT carbon monoxide/ 10 ppm to 200 ppm 200 ppm to 1000 ppm 1.3 % to 0.45 % relative 0.35 % to 0.30 % relative carbon dioxide/ 0.1 % to 15 % 0.45 % to 0.15 % relative Preparation of primary reference gas mixtures (PRGM) by ISO :2015 using high precision gravimetry oxygen/ 0.5 % to 25 % 1.0 % to 0.2 % relative nitric oxide/ 5 ppm to 5000 ppm 0.6 % to 0.25 % relative dioxide/synthetic air 5 ppm to 500 ppm 2.0 % relative sulphur dioxide/ 5 ppm to 2000 ppm 1.5 % to 0.5 % relative methane/ 0.1 % to 5 % 0.4 % to 0.15 % relative methane/synthetic air 0.1% to 2.5 % 0.4 % to 0.15 % relative propane/ 1 ppm to 1000 ppm 0.1 % to 2 % 2 % to 0.4 % relative 0.4 % to 0.15 % relative propane/synthetic air 1 ppm to 1000 ppm 0.1 % to 1.1 % 2 % to 0.4 % relative 0.4 % to 0.15 % relative PROPANE BALANCE GAS In-house method TM016/UT ethane 0.1 to to % relative % relative Preparation of primary reference gas mixtures (PRGM) by ISO :2015 using high precision gravimetry propane 92 to % relative iso-butane 0.03 to % relative Assessment Manager: CA2 Page 4 of 14

5 PRIMARY REFERENCE GAS (PRGM) (continued) PROPANE BALANCE GAS (continued) In-house method TM016/UT (continued) n-butane 0.03 to % relative iso-pentane 0.02 to % relative n-pentane 0.02 to % relative SECONDARY REFERENCE GAS (SRGM) Calibration of synthetic gas mixtures by analysis SYNTHETIC NATURAL GAS In-house method TM001/UT carbon dioxide 0.1 to to % relative % relative Calibration of gas mixtures by ISO 6143:2001 using gas chromatography with thermal conductivity detection (GC-TCD) methane 34 to % relative ethane 0.1 to % relative propane 0.05 to % relative iso-butane 0.01 to to 2 n-butane 0.01 to to % relative % relative neo-pentane to % relative iso-pentane to % relative n-pentane to % relative n-hexane to % relative Calibration of gas mixtures using gas chromatography with flame 2-methylpentane to % relative ionisation detection (GC-FID) 3-methylpentane to % relative ,2-dimethylbutane to % relative benzene to % relative cyclohexane to % relative n-heptane to % relative toluene to % relative Assessment Manager: CA2 Page 5 of 14

6 SECONDARY REFERENCE GAS (SRGM) (continued) SYNTHETIC NATURAL GAS (continued) In-house method TM001/UT (continued) methylcyclohexane to % relative n-octane to % relative n-nonane to % relative n-decane to % relative C to % relative C 6+ is the sum of all hydrocarbons containing six carbon atoms or greater helium hydrogen to to % relative % relative Calibration of gas mixtures using gas chromatography with thermal conductivity detection (GC-TCD) In-house method TM026/UT oxygen 5 ppm to 100 ppm 1.6 % relative ppm Calibration of oxygen in gas 100 ppm to 1000 ppm 0.9 % relative ppm mixtures by ISO 12963:2017 using 0.1 % to 1.0 % 0.7 % relative ppm galvanic fuel cell sensors 1.0 % to 22.5 % [1] 0.18 % relative + 30 ppm Note [1] - The upper limit for oxygen may be limited due to restrictions in place required for the safe manufacture of such mixtures. Assessment Manager: CA2 Page 6 of 14

7 Tarapur SECONDARY REFERENCE GAS (SRGM) (continued) SYNTHETIC NATURAL GAS (continued) In-house method TM005/TA carbon dioxide 0.1 to to % relative % relative Calibration of gas mixtures by ISO 6143:2001 using gas chromatography with thermal conductivity detection (GC-TCD) methane 64 to % relative ethane 0.1 to % relative propane 0.05 to % relative iso-butane 0.01 to to 1.2 n-butane 0.01 to to % relative % relative neo-pentane to % relative iso-pentane to % relative n-pentane to % relative n-hexane to % relative Calibration of gas mixtures using gas chromatography with flame 2-methylpentane to % relative ionisation detection (GC-FID) 3-methylpentane to % relative ,2-dimethylbutane to % relative benzene to % relative cyclohexane to % relative n-heptane to % relative toluene to % relative methylcyclohexane to % relative n-octane to % relative n-nonane to % relative n-decane to % relative oxygen to 1 5 % relative Calibration of gas mixtures using gas chromatography with thermal conductivity detection (GC-TCD) Assessment Manager: CA2 Page 7 of 14

8 Qatar SECONDARY REFERENCE GAS (SRGM) (continued) SYNTHETIC NATURAL GAS (continued) In-house method TM022/QA carbon dioxide 0.1 to to % relative % relative Calibration of gas mixtures by ISO 6143:2001 using gas chromatography with thermal conductivity detection (GC-TCD) methane 64 to % relative ethane 0.1 to % relative propane 0.05 to % relative iso-butane 0.01 to to 1.2 n-butane 0.01 to to % relative % relative neo-pentane to % relative iso-pentane to to 0.35 n-pentane to to % relative % relative n-hexane to % relative Calibration of gas mixtures using gas chromatography with flame 2-methylpentane to % relative ionisation detection (GC-FID) 3-methylpentane to % relative ,2-dimethylbutane to % relative benzene to % relative cyclohexane to % relative n-heptane to % relative toluene to % relative methylcyclohexane to % relative n-octane to % relative n-nonane to % relative n-decane to % relative oxygen to 1 5 % relative Calibration of gas mixtures using gas chromatography with thermal conductivity detection (GC-TCD) Assessment Manager: CA2 Page 8 of 14

9 All Sites GAS MIXTURE PROPERTIES Calculated values from composition superior calorific value molar basis (kj.mol -1 ) mass basis (MJ.kg -1 ) volume basis (MJ.m -3 ) inferior calorific value molar basis (kj.mol -1 ) mass basis (MJ.kg -1 ) volume basis (MJ.m -3 ) relative density density (kg.m -3 ) Calculations are restricted to gas mixtures with < 30 carbon dioxide < 15 ethane < 15 other components < 5 methane no restriction Values calculated according to ISO 6976:1995 (including amendment No 1, May 1998) on a real or ideal gas basis assuming mixture is dry (free from water) Combustion properties can be expressed in units of the Joule (J) or in kilowatt hours (kwh) superior Wobbe index (MJ.m -3 ) inferior Wobbe index (MJ.m -3 ) molar mass (kg.kmol -1 ) compression factor gross calorific value molar basis (kj.mol -1 ) mass basis (MJ.kg -1 ) volume basis (MJ.m -3 ) net calorific value molar basis (kj.mol -1 ) mass basis (MJ.kg -1 ) volume basis (MJ.m -3 ) relative density density (kg.m -3 ) Calculations are applicable to any gaseous natural gas, natural gas substitute, or other combustible fuel, except that for properties on a volume basis, where the method is restricted only to gas mixtures for which the compression factor is greater than kj.mol MJ.kg MJ.m kj.mol MJ.kg MJ.m kg.m -3 Values calculated according to ISO 6976:2016 on a real or ideal gas basis assuming mixture is dry (free from water) Combustion properties can be expressed in units of the Joule (J) or in kilowatt hours (kwh) gross Wobbe index (MJ.m -3 ) net Wobbe index (MJ.m -3 ) MJ.m MJ.m -3 molar mass (kg.kmol -1 ) compression factor kg.kmol gross heating value net heating value relative density compressibility factor There are no composition or property-related restrictions on the method specified Calculated values according to methods given in GPA (2009) using data tables from GPA gross heating value net heating value relative density density compressibility factor There are no composition or property-related restrictions on the method specified Calculated values according to methods given in ASTM D (2011) using data tables from GPA Assessment Manager: CA2 Page 9 of 14

10 SECONDARY REFERENCE GAS (SRGM) (continued) SULPHUR GAS In-house method TM002/UT matrix gas : methane or hydrogen sulphide carbonyl sulphide 0.2 to to 10 2 % relative % relative Calibration of gas mixtures using gas chromatography with sulphur chemiluminescence detection (GC-SCD) methanethiol (methyl mercaptan) 0.2 to 10 2 % relative ethanethiol (ethyl mercaptan) 0.2 to 10 2 % relative dimethyl sulphide 0.2 to 10 2 % relative propanethiol (n-propyl mercaptan) 2-propanethiol (iso-propyl mercaptan) ethyl methyl sulphide (methyl ethyl sulphide) 1-butanethiol (n-butyl mercaptan) 2-methyl-2-propanethiol (tert-butyl mercaptan) 2-methyl-1-propanethiol (iso-butyl mercaptan) 1-methyl-1-propanethiol (sec-butyl mercaptan) 0.2 to 10 4 % relative to 10 2 % relative to 10 2 % relative to 10 4 % relative to 10 2 % relative to 10 4 % relative to 10 4 % relative diethyl sulphide 0.2 to 10 2 % relative n-hexyl mercaptan 0.2 to 10 4 % relative tetrahydrothiophene (THT) 0.2 to 10 2 % relative BLAST FURNACE GAS In-house method TM004/UT carbon dioxide 40 to to 30 1 % relative 1 % relative Calibration of gas mixtures by ISO 6143:2001 using gas chromatography with thermal conductivity detection (GC-TCD) hydrogen 1 to 8 1 % relative carbon monoxide 20 to 30 1 % relative Assessment Manager: CA2 Page 10 of 14

11 SECONDARY REFERENCE GAS (SRGM) (continued) PROPANE BALANCE GAS In-house method TM020/UT 0.1 to % relative Calibration of gas mixtures using gas chromatography with thermal ethane 0.25 to % relative conductivity detection (GC-TCD) propane 92 to % relative iso-butane 0.03 to % relative n-butane 0.03 to % relative iso-pentane 0.02 to % relative n-pentane 0.02 to % relative BINARY EMISSION GAS In-house method TM025/UT propane in propane in synthetic air 1 ppm to 50 ppm 1 ppm to 50 ppm 0.6 % relative ppm 0.6 % relative ppm Calibration of gas mixtures by ISO 12963:2017 using gas chromatography with flame ionisation detection (GC-FID) BINARY GAS In-house method TM026/UT oxygen in 5 ppm to 100 ppm 1.6 % relative ppm Calibration of gas mixtures by 100 ppm to 1000 ppm 0.9 % relative ppm ISO 12963:2017 using 0.1 % to 1.0 % 0.7 % relative ppm galvanic fuel cell sensors 1.0 % to 22.5 % 0.18 % relative + 30 ppm TERTIARY EMISSION GAS In-house method TM014 nitric oxide 5 ppm to 600 ppm 1.1 % to 0.5 % relative Calibration of gas mixtures dioxide 5 ppm to 500 ppm 4 % relative by ISO 12963:2017 using in dynamically generated reference gases in accordance with ISO 6145 Part 7 Thermal Mass Flow Controllers Assessment Manager: CA2 Page 11 of 14

12 All Sites SECONDARY REFERENCE GAS (SRGM) (continued) BINARY EMISSION GAS In-house method TM014 carbon monoxide in or synthetic air carbon dioxide in or synthetic air oxygen in 10 ppm to 200 ppm 200 ppm to 1000 ppm 0.1 % to 1 % 1 % to 15 % 0.5 % to 3 % 3 % to 25 % 1.5 % to 0.9 % relative 0.7 % to 0.6 % relative 0.9 % to 0.6 % relative 0.6 % to 0.3 % relative 2.1 % to 0.7 % relative 0.7 % to 0.4 % relative Calibration of gas mixtures by ISO 12963:2017 using dynamically generated reference gases in accordance with ISO 6145 Part 7 Thermal Mass Flow Controllers nitric oxide in 5 ppm to 60 ppm 60 ppm to 600 ppm 1.1 % to 0.9 % relative 0.6 % to 0.5 % relative dioxide in synthetic air 5 ppm to 500 ppm 4 % relative sulphur dioxide in or synthetic air methane in methane in synthetic air 5 ppm to 100 ppm 100 ppm to 1000 ppm 0.1 % to 1 % 1 % to 5 % 0.1 % to 1 % 1 % to 2.5 % 3.0 % to 1.2 % relative 1.2 % to 1.0 % relative 0.7 % to 0.4 % relative 0.4 % to 0.3 % relative 0.7 % to 0.4 % relative 0.4 % to 0.3 % relative LIQUEFIED NATURAL GAS (LNG) ANALYSERS Calibration of LNG analysers using reference liquid mixtures LNG ANALYSERS In-house method TM024/UT methane 0.1 to to % relative Calibration of analysers used for direct measurement of liquefied natural gas (LNG) using cryogenically prepared reference liquid mixures ethane 0.1 to 4 4 to % relative % relative propane 0.1 to % relative iso-butane 0.02 to % relative n-butane 0.02 to % relative iso-pentane 0.01 to % relative n-pentane 0.01 to % relative Assessment Manager: CA2 Page 12 of 14

13 Customers sites GAS ANALYSERS Calibration of gas analysers using reference gas mixtures NATURAL GAS ANALYSERS In-house method TM to % relative Calibration of gas analysers used for natural gas analysis in carbon dioxide 0.05 to % relative accordance with ISO 10723:2012 methane 34 to ethane 0.1 to % relative propane 0.05 to % relative iso-butane 0.01 to % relative n-butane 0.01 to % relative neo-pentane to % relative iso-pentane to % relative n-pentane to % relative n-hexane to % relative n-heptane to % relative n-octane to % relative n-nonane to % relative n-decane to % relative OTHER FUEL GAS ANALYSERS In-house method TM006 C 1 - C to 100 s from 1 % to 100 % C to 50 ± 0.5 % relative Calibration of gas analysers based on ISO 10723:2012 C to 9 s from 0.1 % to 1 % C to 1.5 ± 1 % relative C to 0.5 s from % to 0.1 % C to 0.2 ± 2 % relative C to 0.2 C to 0.05 benzene to 1 Assessment Manager: CA2 Page 13 of 14

14 Customers sites GAS ANALYSERS (continued) OTHER FUEL GAS ANALYSERS (continued) In-house method TM006 (continued) toluene to 0.4 s from 1 % to 100 % xylenes (m, p and o) to 0.1 ± 0.5 % relative argon 0.1 to 100 s from 0.1 % to 1 % carbon dioxide 0.03 to 100 ± 1 % relative carbon monoxide to 100 s from % to 0.1 % helium 0.1 to 100 ± 2 % relative hydrogen 0.08 to to 100 oxygen 0.05 to 100 OTHER GAS ANALYSERS hydrogen sulphide 1 to 10 2 % relative END Assessment Manager: CA2 Page 14 of 14