STS402 Hunter Water Corporation A.B.N. 46 228 513 446 Standard Technical Specification for: CONSTRUCTION OF SUBMERSIBLE SEWAGE PUMPING STATIONS This Standard Technical Specification was developed by Hunter Water to be used for the construction and/or maintenance of water and/or sewerage works that are, or are to become, the property of Hunter Water. It is intended that this Standard Technical Specification be used in conjunction with various other standard and project specific drawings and design requirements as defined by Hunter Water for each particular project. Hunter Water does not consider this Standard Technical Specification suitable for use for any other purpose or in any other manner. Use of this Standard Technical Specification for any other purpose or in any other manner is wholly at the user's risk. Hunter Water makes no representations or warranty that this Standard Technical Specification has been prepared with reasonable care and does not assume a duty of care to any person using this document for any purpose other than stated. In the case of this document having been downloaded from Hunter Water's website; - Hunter Water has no responsibility to inform you of any matter relating to the accuracy of this Standard Technical Specification which is known to Hunter Water at the time of downloading or subsequently comes to the attention of Hunter Water. - This document is current at the date of downloading. Hunter Water may update this document at any time. Copyright in this document belongs to Hunter Water Corporation. Hunter Water Corporation A.B.N. 46 228 513 446 CONTENTS 1. GENERAL ...........................................................................................................1 1.1 Scope .............................................................................................................................. 1 1.2 Interpretation ................................................................................................................... 1 2. REFERENCED DOCUMENTS.............................................................................1 3. ORDER OF CONSTRUCTION.............................................................................3 4. MATERIALS ........................................................................................................3 4.1 General............................................................................................................................ 3 4.2 On-site Stockpiles ........................................................................................................... 3 4.3 Bedding Sand.................................................................................................................. 3 4.4 High Grade Compaction Sand ........................................................................................ 3 4.5 Select Fill......................................................................................................................... 3 4.6 Trench Fill ....................................................................................................................... 4 4.7 Cement Stabilised Trench Fill ......................................................................................... 4 4.8 Pipes and Fittings............................................................................................................ 4 4.9 Polyethylene Sleeving ..................................................................................................... 4 4.10 Geotextile Filter Fabric .................................................................................................... 4 4.11 Timber Piles .................................................................................................................... 4 4.12 Fasteners ........................................................................................................................ 4 4.13 Cement............................................................................................................................ 4 4.14 Concrete.......................................................................................................................... 5 4.15 Reinforcement................................................................................................................. 5 4.16 Appurtenances ................................................................................................................ 5 4.17 Knife Gate Valves............................................................................................................ 5 4.18 Equipment Number Labels.............................................................................................. 5 4.19 Metering Equipment ........................................................................................................ 6 4.20 Lock Barrels .................................................................................................................... 6 5. EXISTING SERVICES .........................................................................................6 5.1 Location of Services........................................................................................................ 6 5.2 Protection and Maintenance of Services......................................................................... 6 5.3 Repair of Services........................................................................................................... 6 6. CLEARING ..........................................................................................................6 7. EXCAVATION......................................................................................................6 7.1 Limits of Excavation ........................................................................................................ 6 7.2 Improved Surfaces.......................................................................................................... 7 7.3 Drainage and Dewatering................................................................................................ 7 7.4 Foundations and Foundation Stabilisation ...................................................................... 7 7.5 Extra Depth Excavation................................................................................................... 7 7.6 Surplus Excavated Material............................................................................................. 8 8. PIPE BEDDING, LAYING, JOINTING AND BACKFILLING ................................8 8.1 General............................................................................................................................ 8 8.2 Pipework Surface Coating............................................................................................... 8 9. BACKFILLING OF STRUCTURES......................................................................8 9.1 General............................................................................................................................ 8 9.2 Compaction and Density Testing .................................................................................... 9 10. CONCRETE.........................................................................................................9 10.1 General............................................................................................................................ 9 10.2 Identification Certificate................................................................................................. 10 10.3 Expansion and Contraction Joints................................................................................. 10 10.4 Blockouts and Cored Holes........................................................................................... 10 10.5 Cast In Items ................................................................................................................. 11 10.6 Specific Requirements .................................................................................................. 11 10.7 Unformed Surfaces Finish ............................................................................................ 12 10.8 Topping and Benching .................................................................................................. 12 10.9 Concrete Repairs .......................................................................................................... 12 10.10 Testing .......................................................................................................................... 12 STS402 September 2011 Construction of Submersible Sewage Pumping Stations 11. PUMPING STATION WET WELL......................................................................13 11.1 Flotation......................................................................................................................... 13 11.2 Corrosion Protection ........................................................................................................ 13 11.3 Precast Concrete Units ................................................................................................. 13 11.4 Tolerances..................................................................................................................... 13 11.5 Blockouts....................................................................................................................... 13 11.6 Cast Insitu Plug ............................................................................................................