69. Flushing by means of water of nullahs and streams. More use might be made of it preferably for the drains.
70. Flushing by sea-water of high-level street sewers unnecessary and of house sewers impracticable.
70. Salt-water flushing of gutters, storm-water drains and low-level sewers, in some cases at least desirable.
71. Traps for gulleys connected with the street
sewers wanted.
A suitable type of trap- ped gulley to be evolved.
72. More trapped sewer-gulleys required near the foot of down-pipes where side channels are nearly level.
74. Scavenging of street sewers, drains and nul- lahs to be under direction of Medical Offi- cer of Health.
Extensions, alterations and new works to be executed as now by Public Works De- partment.
75. Sewer-vents, not ventilation desirable in
many places.
Ventilation of Sewers. Ventilation by grating in man-hole covers or by untrapped gulley's, objectionable.
77. Application of combined ventilation of house
and street sewer to Hongkong.
78. Sewer-ventilation. Tentative procedure recommended. Suggests nature of ex- periment that might be tried in one district.
82. Sewer Pipes for house sewers.
Advisable
to inspect and test them before use.
691
Six large tanks (including the one in Garden. Road) are proposed to be constructed for flushing low-level sewers from nullahs. The work will be commenced in 1906.
Noted.
With the adoption of the new type of gulley, it is hoped that flushing will not be so much re- quired and that the water in the nullahs will suffice for the purpose.
A large number of the new type of gulley have already been constructed in the low-levels of the City and they will be extended to the high levels.
Adoption of new gulleys will probably render this unnecessary.
This has not been carried out owing to the great increase in cost involved. (See C.S.O. 2856/1902).
This remains as heretofore.
No arrangements yet made.
New type gulleys are all trapped. Gratings in man-hole covers have generally been filled in.
No arrangements yet made.
A block on the New Praya was suggested last year, but no definite arrangements have been made with the Architects, &c.
83. Tests required explained.
84. Tests to be made at a depôt.
85. Standard of quality to be established.
This is done and all defective pipes are re- jected.
86. Fee for inspection of house-sewers. Recom- mends $10 for every inspection necessary beyond the first.
87. Cast-iron house sewers recommended.— They should be coated with Dr. ANGUS SMITH'S composition.
88. Cast-iron down-pipes and ventilating pipes
to be made compulsory.
89. Ventilation of house-sewers.
Provision made under Building Ordinance 1 of 1903.
Drainage Bye-law No. 25 requires ventilating pipes to be of iron, proviso to Bye-law 28 re- quires down-pipes abutting on streets to be of iron but allows down-pipes in private yards to be of glazed stoneware. This is considered to meet the requirements of the case.
Dealt with in No. 77.
No comments yet.
Private notes are available after approval.