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: Laboratory locations: Calibration performed by the Organisations at the locations specified below 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 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 Gate 3, Street 42 Salwa Industrial Area PO Box Doha State of Qatar Local contact Biju Davis Tel: Fax: 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 13

2 Uttoxetrer DETAIL OF ACCREDITATION PRIMARY REFERENCE GAS MIXTURES (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 MIXTURES 0.02 to to % relative % relative Preparation of primary reference gas mixtures (PRGM) according to ISO :2015 by 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: JG2 Page 2 of 13

3 PRIMARY REFERENCE GAS MIXTURES (PRGM) SYNTHETIC FUEL GAS MIXTURES 0.1 to to % relative % relative Preparation of primary reference gas mixtures (PRGM) according to ISO :2015 by 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 MIXTURES matrix gas : methane or hydrogen sulphide carbonyl sulphide 0.2 to to % relative % relative Preparation of primary reference gas mixtures (PRGM) according to ISO :2015 by 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: JG2 Page 3 of 13

4 PRIMARY REFERENCE GAS MIXTURES (PRGM) SULPHUR GAS MIXTURES 2-methyl-1-propanethiol (iso-butyl mercaptan) 1-methyl-1-propanethiol (sec-butyl mercaptan) matrix gas : methane or diethyl sulphide n-hexyl mercaptan tetrahydrothiophene (THT) BINARY GAS MIXTURES (mol/mol) (mol/mol) carbon monoxide/ 10 ppm to 200 ppm 200 ppm to 1000 ppm 1.3 % to 0.45 % relative 0.35 % to 0.30 % relative / 0.1 % to 15 % 0.45 % to 0.15 % relative Preparation of primary reference gas mixtures (PRGM) according to ISO :2015 by 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 MIXTURES ethane 0.1 to to % relative % relative Preparation of primary reference gas mixtures (PRGM) according to ISO :2015 by high precision gravimetry propane 92 to % relative iso-butane 0.03 to % relative Assessment Manager: JG2 Page 4 of 13

5 PRIMARY REFERENCE GAS MIXTURES (PRGM) PROPANE BALANCE GAS MIXTURES n-butane 0.03 to % relative iso-pentane 0.02 to % relative n-pentane 0.02 to % relative SECONDARY REFERENCE GAS MIXTURES (SRGM) Calibration of synthetic gas mixtures by analysis SYNTHETIC NATURAL GAS MIXTURES In-house method TM001/UT 0.1 to to % relative % relative Calibration of gas mixtures in accordance with ISO 6143:2001 using gas methane 34 to % relative chromatography with thermal conductivitydetection (GC-TCD) 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: JG2 Page 5 of 13

6 Tarapur SECONDARY REFERENCE GAS MIXTURES (SRGM) SYNTHETIC NATURAL GAS MIXTURES In-house method TM001/UT 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 oxygen helium to to % relative 1.7 % relative Calibration of gas mixtures using gas chromatography with thermal conductivity detection (GC-TCD) hydrogen to % relative In-house method TM005/TA 0.1 to to % relative % relative Calibration of gas mixtures in accordance with ISO 6143:2001 using gas methane 64 to % relative chromatography with thermal conductivity detection (GC-TCD) ethane 0.1 to % relative propane 0.05 to % relative iso-butane 0.01 to to % relative n-butane 0.01 to to % relative neo-pentane to % relative iso-pentane to % relative n-pentane to % relative n-hexane 2-methylpentane to to % relative % relative Calibration of gas mixtures using gas chromatography with flame ionisation detection (GC-FID) 3-methylpentane to % relative ,2-dimethylbutane to % relative Assessment Manager: JG2 Page 6 of 13

7 Tarapur Qatar SECONDARY REFERENCE GAS MIXTURES (SRGM) SYNTHETIC NATURAL GAS MIXTURES In-house method TM005/TA 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) In-house method TM022/QA 0.1 to to % relative % relative Calibration of gas mixtures in accordance with ISO 6143:2001 using gas methane 64 to chromatography with thermal conductivity detection (GC-TCD) ethane 0.1 to % relative propane 0.05 to % relative iso-butane 0.01 to to % relative n-butane 0.01 to to % relative neo-pentane to % relative iso-pentane to to 0.35 n-pentane to to % relative % relative n-hexane 0.1 to % relative Assessment Manager: JG2 Page 7 of 13

8 Qatar All Sites SECONDARY REFERENCE GAS MIXTURES (SRGM) SYNTHETIC NATURAL GAS MIXTURES In-house method TM022/QA 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 Calculated values for: calorific value (superior) calorific value (inferior) relative density density Wobbe index mean molecular mass compression factor Calculations valid for gas mixtures with amount fractions < 30 % < 15 % ethane < 15 % other components < 5 % methane no restriction Calculated values according to ISO 6976:1995 including amendment No 1, May 1998 gross heating value net heating value relative density compressibility factor no compositional restrictions 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 no compositional restrictions specified Calculated values according to methods given in ASTM D (2011) using data tables from GPA Assessment Manager: JG2 Page 8 of 13

9 SECONDARY REFERENCE GAS MIXTURES (SRGM) SULPHUR GAS MIXTURES 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) 0.2 to 10 4 % relative to 10 2 % relative to 10 2 % relative to 10 4 % relative methyl-2-propanethiol (tert-butyl mercaptan) 2-methyl-1-propanethiol (iso-butyl mercaptan) 1-methyl-1-propanethiol (sec-butyl mercaptan) 0.2 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 MIXTURES In-house method TM004/UT 40 to to 30 1 % relative 1 % relative Calibration of gas mixtures in accordance with ISO 6143:2001 using gas chromatography with hydrogen 1 to 8 1 % relative thermal conductivity detection (GC-TCD) carbon monoxide 20 to 30 1 % relative Assessment Manager: JG2 Page 9 of 13

10 SECONDARY REFERENCE GAS MIXTURES (SRGM) REFINERY GAS MIXTURES In-house method TM012/UT 0.1 to to % relative % relative Calibration of gas mixtures in accordance with ISO 6143:2001 using gas chromatography with thermal conductivity (GC-TCD) and flame ionisation detection (GC-FID) hydrogen 10 to to % relative carbon monoxide 0.1 to % relative methane 10 to ethane 0.5 to % relative ethene 0.5 to % relative propane 0.1 to to % relative propene 0.1 to % relative PROPANE BALANCE GAS MIXTURES 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 MIXTURES In-house method TM025/UT propane in propane in synthetic air 1 to 50 1 to % relative 0.6 % relative Calibration of gas mixtures in accordance with ISO/DIS using gas chromatography with flame ionisation detection (GC-FID) Assessment Manager: JG2 Page 10 of 13

11 All Sites SECONDARY REFERENCE GAS MIXTURES (SRGM) BINARY EMISSION GAS MIXTURES (mol/mol) (mol/mol) In-house method TM014 carbon monoxide in or synthetic air 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 in accordance with ISO/DIS using dynamically generated reference gases in accordance with ISO 6145 Part 7: Thermal Mass Flow Controllers nitric oxide in 10 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 5 ppm to 100 ppm 100 ppm to 1000 ppm 0.1 % to 1 % 1 % to 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 methane in synthetic air 0.1 % to 1 % 1 % to 2.5 % 0.7 % to 0.4 % relative 0.4 % to 0.3 % relative MULTI-COMPONENT EMISSION GAS MIXTURES (mol/mol) (mol/mol) In-house method TM014 matrix gas : or synthetic air (where compatible) carbon monoxide 10 ppm to 200 ppm 1.5 % to 0.9 % relative Calibration of gas mixtures 0.1 % to 1 % 1 % to 15 % 0.9 % to 0.6 % relative 0.6 % to 0.3 % relative oxygen 3 % to 25 % 0.7 % to 0.4 % relative in accordance with ISO/DIS using dynamically generated reference gases in accordance with ISO 6145 Part 7: Thermal Mass Flow Controllers nitric oxide sulphur dioxide 10 ppm to 60 ppm 60 ppm to 600 ppm 10 ppm to 100 ppm 100 ppm to 1000 ppm 1.1 % to 0.9 % relative 0.6 % to 0.5% relative 2.7 % to 1.2 % relative 1.2 % to 1.0 % relative The following components cannot be provided in the same mixture: sulphur dioxide and sulphur dioxide and methane nitric oxide and oxygen methane 0.1 % to 1 % 1 % to 5 % 0.7 % to 0.4 % relative 0.4 % to 0.3 % Assessment Manager: JG2 Page 11 of 13

12 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 0.05 to % relative accordance with ISO 10723:2012 methane 34 to % mol/mol 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: JG2 Page 12 of 13

13 Customers sites GAS ANALYSERS OTHER FUEL GAS ANALYSERS In-house method TM006 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 % 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: JG2 Page 13 of 13