M 168
(22). The adulterated teas were all old used leaves, some of which had undoubtedly been collected from spittoons etc., dried, and sold again. The vinegars were all locally made and, as a result of investigation carried out in conjunction with the I. & E. Department, the standard for these is to be lowered, as 4 grms. acetic acid per 100 ccs. is too high.
Water samples & Sewage samples.
(23). During the year, the regular routine examinations of local Government water supplies were carried out, and again it is to be reported that the supplies were above reproach.
(24). An investigation of the water supply at the Pokfulam Dairy Farm was carried out in conjunction with other investigations dealing with the dysentery epidemic in November, and it would appear that the water supply was not the cause of the trouble.
(25). Routine examinations of the water at the new site at Kam Tin were carried out, and many supplies to police stations in out districts were examined.
(26). A prolonged investigation of the working of the septic tank at Repulse Bay, necessitating the installation of an inspection and sampling chamber with flow gauge in the outlet pipe, was carried out. Samples and readings of the volume of the effluent at intervals from dawn to dusk were taken, and, as a result of the investigation, it can be stated that the presence of the tank is not the cause of faecal pollution of the bay.
(27). At the end of the year, an investigation was started on the state of pollution of the harbour of Refuge-Yaumati, in order to ascertain if a sewage outfall could be safely run into this area. The work is still in progress.
Dangerous Goods.
(28). These were samples of oils from lighters etc. for flash point, and explosives for identification in connection with the enforcement of the Ordinance.
(29).
Bio-chemical Examinations.
Blood for blood urea nitrogen 19 samples 73 sugar 71 calcium 11 61 ?? 6 21 carbon monoxide 1 91 Calculii Stool 27 " 13 S.M 168
(22). The adulterated teas were all old used leaves some of which had undoubtedly been collected from spittoons etc., dried, and sold again. The vinegars were all locally made and as a result of investigation carried out in conjunction with the I. & E. Department the standard for these is to be lowered as 4 grms. acetic acid per 100 ees. is too high.
Water samples & Sewage samples.
(23). During the year the regular routine examinations of local Government water supplies were carried out and again it is to be reported that the supplies were above reproach.
(24). An investigation of the water supply at the Pokfulam Dairy Farm was carried out in conjunction with other investiga- tions dealing with the dysentry epidemic in November, and it would appear that the water supply was not the cause of the trouble.
(25). Routine examinations of the water at the new site at Kam Tin were carried out and many supplies to police stations in out districts were examined.
(26). A prolonged investigation of the working of the septic tank at Repulse Bay, necessitating the installation of an inspection and sampling chamber with flow gauge in the outlet pipe, was carried out. Samples and readings of the volume of the effluent at intervals from dawn to dusk were taken and as a result of the investigation it can be stated that the presence of the tank is not the cause of faecal pollution of the bay.
(27). At the end of the year an investigation was started on the state of pollution of the harbour of Refuge-Yaumati, in order to ascertain if a sewage outfall could be safely run into this area. The work is still in progress.
Dangerous Goods.
(28). These were samples of oils from lighters etc. for flash point, and explosives for identification in connection with the enforcement of the Ordinance.
(29).
Bio-chemical Examinations.
Blood for blood urea nitrogen
19 samples
73
71
11
sugar
calcium
61
??
6
21
carbon monoxide
1
91
Calculii
Stool
27
"
13
S.
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