PART 1
General Planning Approval Requirement
The application procedures for sewage treatment plant approval shall follow the requirement given in volume 2 of these guidelines. In general, the application for approval of a treatment plant shall include:
- Sufficient land area for the sewage treatment plant plus additional area to allow for extension to the plant, where necessary.
- Buffer zones
- The location of the sewage treatment plant in relation to the reminder of the system. Sufficient topographic features shall be included to indicate its location in relation to stream and the point of discharge of treated effluent.
- Schematic flow diagrams showing utility systems serving the plant processes and the flow through various plant units.
- Piping, including any arrangements for by-passing individual units. The direction of flow through pipes shall also be shown.
- Hydraulic profiles showing the flow of sewage, supernatant liquor, and sludge
- Location, dimensions and elevations of all existing and proposed plant facilities
- Point of discharge of treated effluent (effluent outfall) and the elevations of high and low water level of the body of water to which the plant effluent is to be discharged.
- Type, size, features and operating capacity of all pumps, blowers, motors and other mechanical devices together with manufacturer catalogues.
- Minimum, average and maximum flows, velocities and top water level in profiles.
- Accessibility, landscaping and fencing
- Flow measurement facilities
- Materials, dimensions and specifications.
- Ground conditions including levels, type, groundwater level and safe bearing pressure of foundation.
- Details of foundation design.
- All other component parts of the sewage treatment plant.
- A technical report, which covers the ‘whole life’ cost evaluation of the plant.
- Presentation requirements, process and instrumentation diagram, and mass balances.
- Detailed drawings that are clear and legible and of standard format.
- Detailed information on operation and maintenance
