from taps connected directly to mains and 94.9% of the 825 samples taken from taps fed via private storage tanks were free from coliform organisms. The higher percentage of substandard samples usually being due to the dirty condition of the private storage tanks from which the samples were taken. All results showed an improvement over the previous year.
8.70. The section's services were utilized by other Divisions mainly in connection with the planning of new treatment works and supply schemes, while requests by other government departments, commercial firms and the general public for analyses and advice on water quality and treatment matters resulted in the examination of 1,132 samples, an increase of 77% over the previous year.
CONSULTANTS LIAISON SECTION
Senior Engineer:
NG Lin-hing, B.S. (Calif.), D.I.C., C.Eng., M.I.C.E., A.M.I.Struct.E., A.M.I.W.E.
General
8.71. This section is responsible for liaison with the consulting engineers working on water supply schemes for the Hong Kong Government. Expenditure on works during the year totalled over $35 million.
Plover Cove Scheme
8.72. The construction of the Plover Cove main and subsidiary dams, the spillway and associated access roads and the Tai Mei Tuk pumping station with control house were completed and the scheme inaugurated by His Excellency the Governor on 20th January, 1969. Reliability trials were completed on all pumpsets and official trials held on two of the units. Wiring of the supervisory control and measuring equipment was completed and the Stage II telemetry system installed.
8.73. The construction of irrigation dams at Hok Tau and Lau Shui Heung was completed and the impounding reservoirs filled during the wet season.
8.74. Installation of valves and pipework to integrate the draw-off of water from the Jubilee Reservoir with the releases from the Plover Cove scheme was started.
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