Reinstatement of HOKLAS accredited environmental test Items

[Tap Water / Water and wastewater]

Microbiological tests:

Total Coliform

DoE (1983) The Bacteriological Examination of

Drinking Water Supplies, 1982

(Membrane Filtration Procedure: Section 7.8 and 7.9.4.1; Bacterial Confirmation: Section 7.9.4.3)

Faecal Coliform

DoE (1983) The Bacteriological Examination of Drinking Water Supplies, 1982

(Membrane Filtration Procedure: Section 7.8 and 7.9.4.2; Bacterial Confirmation: Section 7.7.6.3)

E. coli

DoE (1983) The Bacteriological Examination of Drinking Water Supplies, 1982

(Membrane Filtration Procedure: Section 7.8 and 7.9.4.2; Bacterial Confirmation: Section 7.9.4.4 andin-situ urease test)

Heterotrophic Plate count (Colony count at 35℃)

APHA 22e 9215 A & B

Chemical tests:

Total suspended solid dried at 103 to 105℃

APHA 22e 2540D

Chemical Oxygen Demand

APHA 22e 5220C

pH value

APHA 22e 4500-H+B

Color

APHA 22e 2120 B

Conductivity

APHA 22e 2510 B

Turbidity

APHA 22e 2130 B

Chlorine

APHA 22e 4500-Cl G

Metals (Aluminum, Antimony, Arsenic, Boron, Cadmium, Chromium, Copper, Iron, Lead, Manganese, Nickel, Selenium, Mercury)

In-house method CHM-WTR-METALS-ICPMS