CONTENTS Introduction How does a Septic Tank System (STS) work Control what goes into your STS Inspect, desludge and repair your STS What to do if your STS floods or overflows Disposal of sullage If your STS do not receive sullage If you do not have a STS Precautions when planning for a new STS Connecting to communal sewer Legal requirements under the Water Pollution Control Ordinance (WPCO) Further information Regional Office Boundary Map Record of Inspection, Desludging and Repair Work Some Immediate Action to take List of contractors undertaking inspection, desludging and repair work List of Registered Septic Tank Desludging Companies Best Practices for the Desludging of Septic Tanks with Vacuum Tankers Registered Disposal Company Update Form Tips on Proper Operation of a Septic Tank System