| INSPECT,
DESLUDGE AND REPAIR YOUR STS |
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| 10. |
| Do
inspect your STS and measure the depth of sludge
at least once every 6 months. More frequent inspection
and desludging might be necessary for heavily used
STS's. |
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|
| |
|
| |
| It
is recommended that you hire experienced personnel
to regularly inspect your STS under your observation,
and to desludge your STS whenever necessary. |
|
| |
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| 11. |
Do inspect your STS immediately whenever
- there
is any flooding / overflow from your STS,
- foul
smell becomes more noticeable,
- your
toilet doesn't flush well or your sink doesn't drain
well.
|
| |
|
| 12. |
Do desludge your STS whenever
- thickness
of sludge exceeds 30 cm (1 ft.) or 1/4 of overall
water depth.
- clogging
of the septic tank outlet pipe or the soakaway pit
or soil is suspected.
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| 13. |
Do dispose of your STS sludge properly. Sludge removed
should be transported by specialist contractors
to sewage treatment works for disposal. The Food
and Environmental Hygiene Department may, subject
to the availability of resources, also provide desludging
services to private STS on a chargeable basis. For
enquiries, please refer to the table
on page 12.
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| 14. |
Do inspect if there is any defect in your drainage system
or STS after each desludging. If so, repair the defect
before resuming discharge into your STS.
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| 15. |
Do keep a record of all inspection, desludging and repair
work carried out at your STS. Use the
table at the back of this book. A photograph can
save a lot of words.
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