Eurofins Mechem Pte. Ltd. Certificate No. : LA-2017-0643-F 127 Woodlands Industrial Park E5 Woodlands e-Terrace Issue No. : 3 Singapore 757500

Date : 20 August 2018 Page : 1 of 14

FIELD OF TESTING : Environmental Testing

MATERIALS / PRODUCTS TESTED

TESTS / PROPERTIES STANDARD METHODS /

TECHNIQUES / EQUIPMENT

APHA Methods 23rd Edition 2017 A Potable / Drinking 1. Appearance APHA 2110 Tap/ Mineral Water 2. Odour MW 01 3. Color APHA 2120 B 4. pH Value APHA 4500 H-B 5. Turbidity APHA 2130 B 6. Conductivity APHA 2510 B 7. Total Alkalinity APHA 2320 B 8. Total Hardness APHA 2340 C 9. Total Solids APHA 2540 B 10. Total Dissolved Solids APHA 2540 C 11. Total Residual Chlorine APHA 4500-Cl-G, DPD tablet 4, DPD 1&3 12. Free Residual Chlorine APHA 4500-Cl-G, DPD tablet 1 13. Chloride, Fluoride } 14. Nitrate, Nitrite } APHA 4110 B 15. Sulphate, Phosphate, Bromide } 16. Bromate (BrO3) APHA 4110 D 17. Nitrite (NO2) HACH 8507

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MATERIALS / PRODUCTS TESTED

TESTS / PROPERTIES STANDARD METHODS /

TECHNIQUES / EQUIPMENT

18. Oil & Grease – Hydrocarbons (Partition APHA 5520 B/F – Gravimetric Method) 19. Cyanide APHA 4500-CN‾-B/C/E 20. Phenols APHA 5530-B/C 21. Sulphide APHA 4500-S2‾-C/F 22. Total Kjeldahl Nitrogen (TKN) TECATOR 23. Elemental analysis by AAS: Iron & Copper APHA 3111 B 24. Mercury – (as Hg) FIMS – CVAAS 25. Elemental analysis by ICP : ) APHA 3120 B Aluminum, Antimony, Arsenic, Barium, Beryllium, Boron, Cadmium, Cobalt Chromium, Copper, Calcium, Iron, Lead, Lithium, Manganese, Magnesium, Molybdenum, Nickel, Potassium, Silicon, Silica, Sodium, Strontium, Silver, Selenium, Tin, Thallium, Zinc, Vanadium 26. Sampling of water From storage tanks SAM/M-PS001 From tap points SAM/M-PT001 27. Total Colony Count APHA 9215 B / APHA 9215 B with NEA specifications, APHA 9215C, APHA 9215D 28. Total Coliform by Membrane Filtration APHA 9222 B Method 29. Faecal Coliform by Membrane Filtration APHA 9222 D Method 30. Escherichia coli APHA 9222 B & APHA 9222 H 31. Total Coliforms and Escherichia coli US EPA 10029, Revision 2, by Membrane Filtration Method 8/17/99 32. Legionella & Legionella pneumophilia ISO 11731:1998 Analysis ISO 11731-2 : 2004 AS/NZS 3896 :2008

Certificate No. : LA-2017-0643-F Issue No. : 3 Date : 20 August 2018 Page : 3 of 14

MATERIALS / PRODUCTS TESTED

TESTS / PROPERTIES STANDARD METHODS /

TECHNIQUES / EQUIPMENT

33. Pseudomonas aeruginosa by filtration APHA 9213E method 34. Total Nitrogen HACH Method 10071 35. Oil & Grease (Non-Hydrocarbon) by APHA 5520B & APHA 5520F deduction 36. Total Suspended Solids APHA 2540D 37. Heavy Metals in Water by GFAAS: APHA 3113B As, Cd, Pb, Sb, Se

38. Flocculated & Filtered Chemical Oxygen Demand (ffCOD)

HACH 8000

39. Chlorate & Chlorite APHA 4110D 40. Chemical Oxygen Demand HACH 8000 B Swimming / Jacuzzi / 1. Appearance APHA 2110 Spa / Recreational / Other Pool Water 2. Odour MW 01 3. Color APHA 2120 B 4. pH Value APHA 4500 H-B 5. Turbidity APHA 2130 B 6. Conductivity APHA 2510 B 7. Total Alkalinity APHA 2320 B 8. Total Hardness APHA 2340 C 9. Total Solids APHA 2540 B 10. Total Dissolved Solids APHA 2540 C 11. Total Residual Chlorine APHA 4500-Cl-G, DPD tablet 4, DPD 1&3 12. Free Residual Chlorine APHA 4500-Cl-G, DPD tablet 1

Certificate No. : LA-2017-0643-F Issue No. : 3 Date : 20 August 2018 Page : 4 of 14

MATERIALS / PRODUCTS TESTED

TESTS / PROPERTIES STANDARD METHODS /

TECHNIQUES / EQUIPMENT

13. Chloride, Fluoride } 14. Nitrate, Nitrite } APHA 4110 B 15. Sulphate, Phosphate, Bromide } 16. Nitrite (NO2) HACH 8507 17. Oil & Grease – Hydrocarbons APHA 5520-B/F (Partition – Gravimetric Method) 18. Cyanide APHA 4500-CN‾-B/C/E 19. Cyanuric Acid MERCK Photometric Method 20. Phenols APHA 5530-B/C 21. Sulphide APHA 4500-S2‾-C/ F 22. Total Kjeldahl Nitrogen (TKN) TECATOR 23. Mercury – (as Hg) FIMS – CVAAS 24. Elemental analysis by AAS: Iron & Copper APHA 3111 B 25. Elemental analysis by ICP : ) APHA 3120 B Aluminum, Antimony, Arsenic, Barium, Beryllium, Boron, Cadmium, Chromium, Copper, Cobalt, Calcium, Iron, Lead, Lithium, Manganese, Magnesium, Molybdenum, Nickel, Potassium, Silicon, Silica, Sodium, Silver, Selenium, Strontium, Thallium, Tin, Vanadium, Zinc 26. Sampling of water-swimming pool SAM/M-S001 27. Total Colony Count APHA 9215 B / APHA 9215 B with NEA specifications, APHA 9215C, APHA 9215D 28. Total Coliform by Membrane Filtration APHA 9222 B Method 29. Faecal Coliform by Membrane Filtration APHA 9222 D Method 30. Escherichia coli APHA 9222 B & APHA 9222 H

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MATERIALS / PRODUCTS TESTED

TESTS / PROPERTIES STANDARD METHODS /

TECHNIQUES / EQUIPMENT

31. Total Coliforms and Escherichia coli US EPA 10029, Revision 2, by Membrane Filtration Method 8/17/99 32. Legionella & Legionella pneumophilia ISO 11731: 1998 Analysis ISO 11731-2 : 2004 AS/NZS 3896 : 2008 33. Pseudomonas aeruginosa by filtration APHA 9213 E method 34. Total Nitrogen HACH Method 10071 35. Oil & Grease (Non-Hydrocarbon) by APHA 5520B & APHA 5520F deduction 36. Total Suspended Solids APHA 2540D 37. Heavy Metals in Water by GFAAS: APHA 3113B As, Cd, Pb, Sb, Se 38. Flocculated & Filtered Chemical Oxygen HACH 8000 Demand (ffCOD) 39. Chlorate & Chlorite APHA 4110D 40. Chemical Oxygen Demand HACH 8000 C Waste & Industrial 1. Appearance APHA 2110 Water / Sewage & Trade Effluent 2. pH Value APHA 4500 H-B 3. Color APHA 2120 B 4. Turbidity APHA 2130 B 5. Conductivity APHA 2510 B 6. Total Alkalinity APHA 2320 B 7. Total Hardness APHA 2340 C 8. Total Solids APHA 2540 B 9. Total Dissolved Solids APHA 2540 C

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MATERIALS / PRODUCTS TESTED

TESTS / PROPERTIES STANDARD METHODS /

TECHNIQUES / EQUIPMENT

10. Total Suspended Solids APHA 2540 D 11. Biochemical Oxygen Demand APHA 5210 B 12. Chemical Oxygen Demand APHA 5220 C HACH 8000 13. Chloride, Fluoride ) 14. Nitrate, Nitrite ) APHA 4110 B 15. Sulphate, Phosphate, Bromide ) 16. Detergent APHA 5540 C 17. Oil & Grease APHA 5520 B 18. Oil & Grease – Hydrocarbons APHA 5520 B / F (Partition – Gravimetric Method) 19. Cyanide APHA 4500-CN‾-B / C / E 20. Phenols APHA 5530 B, C 21. Sulphide APHA 4500-S2‾C, F 22. Total Kjeldahl Nitrogen (TKN) TECATOR 23. Total Phosphorus MW-02 24. Elemental analysis by AAS: Iron & Copper APHA 3111 B 25. Mercury – (as Hg) FIMS - CVAAS 26. Elemental analysis by ICP : APHA 3120 B Aluminium, Antimony, Arsenic, Barium, Beryllium, Boron, Cadmium, Cobalt Chromium, Copper, Calcium, Iron, Lead, Lithium, Manganese, Magnesium, Molybdenum, Nickel, Potassium, Silicon, Silica, Sodium, Strontium, Silver, Selenium, Tin, Thallium, Vanadium, Zinc 27. Total Colony Count APHA 9215B / APHA 9215 B with NEA specifications 28. Total Coliform by Membrane Filtration APHA 9222 B Method

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MATERIALS / PRODUCTS TESTED

TESTS / PROPERTIES STANDARD METHODS /

TECHNIQUES / EQUIPMENT

29. Faecal Coliform by Membrane Filtration APHA 9222 D Method 30. Escherichia coli APHA 9222 B & APHA 9222 H 31. Legionella & Legionella pneumophilia ISO 11731:1998 Analysis ISO 11731-2 : 2004 AS/NZS 3896 : 2008 32. Pseudomonas aeruginosa by filtration APHA 9213 E method 33. Total Nitrogen HACH Method 10071 34. Oil & Grease (Non-Hydrocarbon) by APHA 5520B & APHA 5520F deduction 35. Heavy Metals in Water by GFAAS: APHA 3113B As, Cd, Pb, Sb, Se 36. Flocculated & Filtered Chemical Oxygen HACH 8000 Demand (ffCOD) 37. Chlorate & Chlorite APHA 4110D D Water Feature Water 1. Legionella & Legionella pneumophilia ISO 11731:1998 Analysis ISO 11731-2:2004 AS/NZS 3896 : 2008 2. Total Colony Count APHA 9215 B / APHA 9215 B with NEA Specifications 3. Total Residual Chlorine APHA 4500-Cl-G, DPD tablet 4, DPD 1&3 4. Free Residual Chlorine APHA 4500-Cl-G, DPD tablet 1 5. Total Kjeldahl Nitrogen (TKN) TECATOR 6. Total Phosphorus MW-02 7. pH APHA 4500-H-B 8. Color APHA 2120B

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MATERIALS / PRODUCTS TESTED

TESTS / PROPERTIES STANDARD METHODS /

TECHNIQUES / EQUIPMENT

9. Conductivity APHA 2510B 10. Turbidity APHA 2130 B 11. Pseudomonas aeruginosa by filtration APHA 9213 E method 12. Total Coliform by Membrane filtration APHA 9222 B method 13. Escherichia coli APHA 9222 B & APHA 9222 H 14. Appearance APHA 2110 15. Temperature APHA 2550 B 16. Cyanuric acid Merck photometric method 17. Copper APHA 3111B 18. Total Nitrogen HACH Method 10071 19. Total Suspended Solids APHA 2540D 20. Heavy Metals in Water by GFAAS: APHA 3113B As, Cd, Pb, Sb, Se 21. Flocculated & Filtered Chemical Oxygen HACH 8000 Demand (ffCOD) 22. Chlorate & Chlorite APHA 4110D 23. Chemical Oxygen Demand HACH 8000 E Cooling / Aircon 1. Legionella & Legionella pneumophilia ISO 11731:1998 Tower Water Analysis ISO 11731-2:2004 AS/NZS 3896 : 2008 2. Total Colony Count APHA 9215 B / APHA 9215 B with NEA Specifications 3. Total Residual Chlorine APHA 4500-Cl-G, DPD tablet 4, DPD 1&3 4. Free Residual Chlorine APHA 4500-Cl-G, DPD tablet 1

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MATERIALS / PRODUCTS TESTED

TESTS / PROPERTIES STANDARD METHODS / TECHNIQUES / EQUIPMENT

5. Total Kjeldahl Nitrogen (TKN) TECATOR 6. Total Phosphorus MW-02 7. pH APHA 4500-H-B 8. Color APHA 2120B 9. Conductivity APHA 2510B 10. Turbidity APHA 2130 B 11. M-Alkalinity APHA 2320 B 12. P-Alkalnity APHA 2320 B 13. Total Hardness APHA 2340 C 14. Pseudomonas aeruginosa by filtration APHA 9213 E method 15. Total Nitrogen HACH Method 10071 16. Total Suspended Solids APHA 2540D 17. Heavy Metals in Water by GFAAS: APHA 3113B As, Cd, Pb, Sb, Se 18. Flocculated & Filtered Chemical Oxygen HACH 8000 Demand (ffCOD) 19. Chlorate & Chlorite APHA 4110D 20. Chemical Oxygen Demand HACH 8000 F Boiler Water & 1. Total Kjeldahl Nitrogen (TKN) TECATOR Chiller Water 2. Hydrazine ASTM D 1385-07 3. Total Phosphorus MW-02 4. Pseudomonas aeruginosa by filtration APHA 9213 E method 5. Total Nitrogen HACH Method 10071

Certificate No. : LA-2017-0643-F Issue No. : 3 Date : 20 August 2018 Page : 10 of 14

MATERIALS / PRODUCTS TESTED

TESTS / PROPERTIES STANDARD METHODS /

TECHNIQUES / EQUIPMENT

6. Total Suspended Solids APHA 2540D Heavy Metals in Water by GFAAS: APHA 3113B As, Cd, Pb, Sb, Se 7. Flocculated & Filtered Chemical Oxygen HACH 8000 Demand (ffCOD) 8. Chlorate & Chlorite APHA 4110D 9. Chemical Oxygen Demand HACH 8000 G Sea / Ballast Water 1. pH APHA 4500-H-B 2. Salinity APHA 2520 B 3. Conductivity APHA 2510 B 4. Color, hazen unit APHA 2120 B 5. Turbidity, NTU APHA 2130 B 6. Total Dissolved Solid, mg/l APHA 2540 C 7. Total Suspended Solid, mg/l APHA 2540 D 8. Chemical Oxygen Demand (COD), mg/l Manual on chemical analysis of coastal seawater and sediment HACH 8000 9. Chlorides (Cl). mg/l ) APHA 4110 B 10. Sulfate (SO4), mg/l ) 11. Cyanide, mg/l APHA 4500-CN-B/C/E 12. Phenolic Compounds (as phenols), mg/l APHA 5530 B/C 13. Ionic surfactant, mg/l (LAS as MBAS) APHA 5540 C 14. Total Kjeldahl Nitrogen (TKN) TECATOR 15. Total Phosphorus MW-02 16. Total Nitrogen HACH Method 10071

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MATERIALS / PRODUCTS TESTED

TESTS / PROPERTIES STANDARD METHODS /

TECHNIQUES / EQUIPMENT

17. Elemental analysis APHA 3120 B Aluminium, Antimony, Arsenic, Barium, Beryllium, Boron, Cadmium, Cobalt, Chromium, Copper, Calcium, Iron, Lead, Lithium, Manganese, Magnesium, Molybdenum, Nickel, Potassium, Silicon, Silica, Sodium, Strontium, Silver, Selenium, Tin, Thallium, Vanadium, Zinc 18. Total Plate Count APHA 9215B 19. Total Coliform APHA 9222B 20. Fecal Coliform APHA 9222D 21. Escherichia Coli APHA 9222B & 9222H 22. Enterococci / Intestinal Enterococci USEPA 1600 23. Clostridium perfringens HPA NSM W5i3.1 24. Vibrio Cholerae/ Toxicogenic Vibrio APHA 9260H Cholerae (01,0139) 25. Pseudomonas aeruginosa by filtration APHA 9213 E method 26. Heavy Metals in Water by GFAAS: APHA 3113B As, Cd, Pb, Sb, Se 27. Flocculated & Filtered Chemical Oxygen HACH 8000 Demand (ffCOD) 28. Chlorate & Chlorite APHA 4110D H Catchment / River 1. pH APHA 4500-H-B Well / Ground / Pond Spring Water 2. Salinity, g/l APHA 2520 B 3. Color, hazen unit APHA 2120 B 4. Conductivity, µS/cm APHA 2510 B 5. Turbidity, NTU APHA 2130 B

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MATERIALS / PRODUCTS TESTED

TESTS / PROPERTIES STANDARD METHODS /

TECHNIQUES / EQUIPMENT

6. BOD @ 20°C, 5 Days APHA 5210 B 7. Chemical Oxygen Demand, mg/l APHA 5220 B HACH 8000 8. Dissolved Oxygen, mg/l APHA 5210 B 9. Total Dissolved Solid, mg/l APHA 2540 C 10. Total Suspended Solid, mg/l APHA 2540 D 11. Ionic surfactant, mg/L (LAS as MBAS) APHA 5540 C 12. Ammoniacal Nitrogen (as N) mg/l APHA 4500-NH3-B/C/F 13. Total Kjeldahl Nitrogen (TKN) TECATOR 14. Phenolic compounds (as phenol) APHA 5530 B,C 15. Chlorides (Cl). mg/l APHA 4110 B 16. Sulfate (SO4), mg/l APHA 4110 B 17. Cyanide (CN), mg/l APHA 4500-CN-B/C/E 18. Elemental analysis APHA 3120 B Aluminium, Antimony, Arsenic, Barium, Beryllium, Boron, Cadmium, Cobalt, Chromium, Copper, Calcium, Iron, Lead, Lithium, Manganese, Magnesium, Molybdenum, Nickel, Potassium, Silicon, Silica, Sodium, Strontium, Silver, Selenium, Thallium, Vanadium , Zinc 19. Total Phosphorus MW-02 20. Mercury (as Hg) FIMS – CVAAS 21. Total plate count APHA 9215 B 22. Total Coliform APHA 9222B 23. Fecal Coliform APHA 9222D 24. Escherichia Coli APHA 9222B & 9222H

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MATERIALS / PRODUCTS TESTED

TESTS / PROPERTIES STANDARD METHODS /

TECHNIQUES / EQUIPMENT

25. Enterococci USEPA 1600 26. Clostridium perfringens HPA NSM W5i3.1 27. Vibrio Cholerae APHA 9260 H 28. Pseudomonas aeruginosa by filtration APHA 9213 E Method 29. Total Nitrogen HACH Method 10071 30. Heavy Metals in Water by GFAAS: APHA 3113B As, Cd, Pb, Sb, Se 31. Legionella & Legionella pneumophilia ISO 11731:1998 Analysis ISO 11731-2:2004 AS/NZS 3896 : 2008 32. Flocculated & Filtered Chemical Oxygen HACH 8000 Demand (ffCOD) 33. Chlorate & Chlorite APHA 4110D I Processed Water 1. Total Plate Count APHA 9215D DI / RO / Ultrapure Processed Water 2. Bromate (BrO3) APHA 4110 D 3. Nitrite (NO2) HACH 8507 4. pH APHA 4500-H-B 5. Color APHA 2120 B 6. Conductivity APHA 2510 B 7. Turbidity APHA 2130 B 8. Pseudomonas aeruginosa by filtration APHA 9213 E method 9. Total Suspended Solids APHA 2540D

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MATERIALS / PRODUCTS TESTED

TESTS / PROPERTIES STANDARD METHODS /

TECHNIQUES / EQUIPMENT

10. Legionella & Legionella pneumophilia ISO 11731:1998

Analysis ISO 11731-2:2004 AS/NZS 3896 : 2008 11. Flocculated & Filtered Chemical Oxygen HACH 8000 Demand (ffCOD) 12. Chlorate & Chlorite APHA 4110D 13. Chemical Oxygen Demand HACH 8000

Approved Signatory 1. Mrs Yang Chor Sang – For All Accredited tests 2. Ms See Hoon Hoon ) For All Microbiological tests 3. Ms Moe Moe Min ) 4. Mr Teh Hooi Kuan ) 5. Ms N Chitra Devi 6. Ms Lynn Yap Sow Ling ) For All Chemistry tests 7. Mr Licerio Oligo III ) 8. Mr Lee Pei Lei ) 9. Ms Lea Bautista Gutierrez ) 10. Ms Sheila J Sale ) Note: This laboratory is accredited in accordance with the recognised International Standard ISO/IEC 17025. A laboratory's fulfilment of the requirements of ISO/IEC 17025 means the laboratory meets both the technical competence requirements and management system requirements that are necessary for it to consistently deliver technically valid test results. The management system requirements in ISO/IEC 17025 are written in language relevant to laboratory operations and operate generally in accordance with the principles of ISO 9001.