internationally recognized evaporator manufacturers, all of whom were prequalified. With the exception of one who subsequently withdrew, all were issued with preliminary contract documents.
10.66 The resumption of land and gazetting of areas of reclamation were in progress whilst the preparation of tender documents for the supply aqueduct and for site formation and marine works contracts was well advanced.
WATER QUALITY CONTROL UNIT
Senior Waterworks Chemist: D. L. MAKER, A.R.I.C., P.A.I.W.E.
General
10.67 The Unit, headed by a team of professional Waterworks Chemists, is primarily responsible for controlling water treatment at filter stations and maintaining the quality of supply distributed to consumers.
10.68 Water examination laboratories for chemical, bacteriological and biological testing of samples taken throughout the entire supply networks and of miscellaneous chemicals and materials connected with the water supply industry are located on the Mainland and Hong Kong Island. The total number of samples examined in all laboratories increased by 10% compared with the previous year to 33,947, of which 22,103 were for chemical and 7,345 for bacteriological testing.
10.69 Other waterworks divisions continued to utilize the Unit's water testing and advisory services in connection with the planning and commissioning of new treatment works, extensions to existing works and for the experimental desalting plant. In addition, 1,106 water samples were examined for other government departments, principally the Urban Services Department in connection with the quality of water in public swimming pools, for commercial and industrial firms, and for the general public.
Plover Cove Reservoir
10.70 Regular chemical, limnological and biological surveys were continued. For the third year in succession thermal and chemical stratification developed from April but in contrast to previous years
147
internationally recognized evaporator manufacturers, all of whom were prequalified. With the exception of one who subsequently withdrew, all were issued with preliminary contract documents.
10.66 The resumption of land and gazetting of areas of reclamation were in progress whilst the preparation of tender documents for the supply aqueduct and for site formation and marine works contracts was well advanced.
WATER QUALITY CONTROL UNIT
Senior Waterworks Chemist: D. L. MAKER, A.R.I.C., P.A.I.W.E.
General
10.67 The Unit, headed by a team of professional Waterworks Chemists, is primarily responsible for controlling water treatment at filter stations and maintaining the quality of supply distributed to
consumers.
10.68
Water examination laboratories for chemical, bacteriological and biological testing of samples taken throughout the entire supply networks and of miscellaneous chemicals and materials connected with the water supply industry are located on the Mainland and Hong Kong Island. The total number of samples examined in all laboratories in- creased by 10% compared with the previous year to 33,947, of which 22,103 were for chemical and 7,345 for bacteriological testing.
10.69 Other waterworks divisions continued to utilize the Unit's water testing and advisory services in connection with the planning and commissioning of new treatment works, extensions to existing works and for the experimental desalting plant. In addition, 1,106 water samples were examined for other government departments, principally the Urban Services Department in connection with the quality of water in public swimming pools, for commercial and indus- trial firms, and for the general public.
Plover Cove Reservoir
10.70 Regular chemical, limnological and biological surveys were continued. For the third year in succession thermal and chemical stratification developed from April but in contrast to previous years
147
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