the rock pressure sewerage system reticulation network ... · lockhart shire council pressure...

THE ROCK

PRESSURE SEWERAGE SYSTEM

Reticulation Network

Standard Technical Specification

FEBRUARY 2017

Lockhart Shire Council Pressure Sewerage System Reticulation Network Standard Specification – Issue E

Pressure Sewerage System Reticulation Network Standard Technical Specification

Lockhart Shire Council Document No: …….………………………………

Document Prepared For: Lockhart Shire Council

Revision History

REVISION REPORT STATUS PREPARED BY

REVIEWED BY

APPROVED BY

DATE

A Draft CK SW SW 3-2-17

B Construction CK SW SW 13-4-17

C Construction CK SW SW 23-5-17

D Construction CK SW SW 26-6-17

E Construction CK SW SW 30-6-17

Document ID:

J:\700-Projects\702-Current projects\161205 The Rock\720-Design\782-Specifications\The Rock Swge Scheme - PSS Standard Network Mains Specification Issue E 2017.doc

Pressure System Solutions Pty Ltd A B N 57 097 164 899

Unit 1/47-51 Lorraine Street Peakhurst NSW 2210

Sydney Australia T: +61 2 9584 1177 F: +61 2 9584 1477

PO Box 630 Jannali NSW 2226

E: [email protected]

Intellectual Property

All rights reserved. No part of this document may be reproduced or transmitted in any form, or by any means, electronic, manual, photocopying or by any information storage and retrieval system without the written consent of Pressure System Solutions Pty Ltd.

Lockhart Shire Council Pressure Sewerage System Reticulation Network Standard Specification - i -

TABLE OF CONTENTS INTRODUCTION ..................................................................................................................... 1

B1.1 Standards ................................................................................................................. 1 B1.2 Planning Matters, Authorities Compliance, Permits & Fees ..................................... 2 B1.3 Site Security ............................................................................................................. 3 B1.4 Contractor’s Depot ................................................................................................... 3 B1.5 ‘As Constructed’ Information .................................................................................... 3 B1.6 Other Services Locations ......................................................................................... 3 B1.7 Works Program ........................................................................................................ 4 B1.8 WITNESS AND HOLD POINTS ............................................................................... 4

B2 GENERAL TECHNICAL SPECIFICATION ................................................................. 5 B2.1 General..................................................................................................................... 5 B2.2 Construction Activities .............................................................................................. 5 B2.3 Construction Drawings ............................................................................................. 6 B2.4 Pipework and Fittings ............................................................................................... 6 B2.5 Joining The Pipes ..................................................................................................... 7 B2.6 Capping Off .............................................................................................................. 7 B2.7 Excavation ................................................................................................................ 7 B2.8 Compaction and Testing .......................................................................................... 9 B2.9 Depth and Location of Pipework ............................................................................ 10 B2.10 Horizontal Directional Boring .................................................................................. 11 B2.11 Restoration ............................................................................................................. 14 B2.12 Quality System ....................................................................................................... 16 B2.13 Quality Manual ....................................................................................................... 16 B2.14 Inspection and Test Plans ...................................................................................... 17 B2.15 Quality Tests .......................................................................................................... 17 B2.16 Quality Audits ......................................................................................................... 17 B2.17 Traceability ............................................................................................................. 17 B2.18 Quality Records ...................................................................................................... 17 B2.19 Inspection ............................................................................................................... 18 B2.20 Materials and Workmanship ................................................................................... 18 B2.21 Identification of Staff ............................................................................................... 18 B2.22 Customer Queries and Complaints ........................................................................ 18 B2.23 Ownership .............................................................................................................. 18 B2.24 CLEARANCE ......................................................................................................... 18 B2.25 Identification and Tagging Of New Plant And Equipment ...................................... 18

B3 SPECIFIC TECHNICAL SPECIFICATION ................................................................ 20 B3.1 General................................................................................................................... 20 B3.2 Preliminaries, Planning, Survey Investigation and Design ..................................... 20 B3.3 Electricity and Street Light Poles............................................................................ 20 B3.4 Roadways, Concrete Footways and Areas of Vegetation ...................................... 20 B3.5 Concrete Driveways ............................................................................................... 21 B3.6 Pipework on Public Property .................................................................................. 21 B3.7 Material / Pipes etc ................................................................................................. 21 B3.8 Materials to be Supplied by the Principal ............................................................... 21 B3.9 Materials to be Supplied by the Contractor ............................................................ 22 B3.10 Marking the Pipes................................................................................................... 22 B3.11 Repairs to Mains .................................................................................................... 22 B3.12 Flanges .................................................................................................................. 22 B3.13 Valves..................................................................................................................... 23 B3.14 Isolation Valves ...................................................................................................... 23 B3.15 Air Release Valve ................................................................................................... 23

Lockhart Shire Council Pressure Sewerage System Reticulation Network Standard Specification - ii -

B3.16 FLOWMETER ........................................................................................................ 23 B3.17 Pressure Sewer Collection System Installation ...................................................... 23 B3.18 Road Crossings ...................................................................................................... 27 B3.19 Flushing Points ....................................................................................................... 27 B3.20 Residential Access/ Driveways .............................................................................. 27 B3.21 Locating the Pipeline .............................................................................................. 28 B3.22 Other Services ........................................................................................................ 28 B3.23 Construction Practices ........................................................................................... 29 B3.24 Location Set Outs ................................................................................................... 29 B3.25 Testing of the Mains ............................................................................................... 29 B3.26 Initial Flushing of System ....................................................................................... 32 B3.27 WORK AS EXECUTED .......................................................................................... 32 B3.28 Restoration ............................................................................................................. 33 B3.29 Handover of Collection Mains ................................................................................ 33

B4 GLOSSARY OF TERMS ............................................................................................ 35

Lockhart Shire Council Pressure Sewerage System Reticulation Network Standard Specification – Issue D - 1 -

INTRODUCTION

B1.1 STANDARDS

B1.1.1 General

All equipment, materials and construction carried out in respect to this project shall be based on Australian Standards, WSAA Codes of Practice, Work Health and Safety Acts and Regulations, and the standards of The Principal. The following list of Acts, Codes, Regulations, etc., applies to the project as a whole. The list is not exhaustive and relevant documentation is not necessarily limited to the following.

• Australian Standards and relevant codes of practice (Clause B1.1.3) • AS 2124 -1992 General Conditions of Contract.

B1.1.2 Construction Standards

The Water Services Association of Australia Codes that applies to the design and construction of The Rock pressure sewerage system are:

o Pressure Sewerage Code Of Australia (Sydney Water Edition WSA 07-2007)

o Sewerage Code of Australia (Sydney Water Edition WSA 02-2002 Version 2.3)

o Sewage Pumping Station Code of Australia (WSA 04-2005 Version 2.1)

o RMS and ARTC Requirements

o E-One Installation instructions

B1.1.3 Australian Standards

AS 1012.1 Sampling of Fresh Concrete

AS 1012.3 Methods for the Determination of Properties Related to the Consistency of Concrete

AS 1111 ISO metric hexagon bolts and screws - Product Grade C - Bolts

AS 1112 ISO metric hexagon nuts - Style 1 - Product grades A and B

AS 1214 Hot Dipped Galvanised Coatings on Threaded Fasteners

AS 1237 Plain washers for metric bolts, screws and nuts for general purposes

AS 1275 Metric Screw Threads for Fasteners

AS 1281 Cement mortar lining of steel pipes and fittings

AS 1289 Methods of testing soils for engineering purposes

AS 1379 Specification and supply of concrete

AS 1554 Structural steel welding

AS 1579 Arc welded steel pipes and fittings for water and wastewater

AS 1646 Elastomeric seals for water works purposes


AS 1906 Retro-reflective materials and devices for road traffic control purposes

AS 2280 Ductile iron pressure pipes and fittings

AS 2033 Installation of polyethylene pipe systems

AS 2239 Galvanic (sacrificial) anodes for cathodic protection

AS 2566.1 Structural Design of Buried Flexible Pipe

AS 2566.2 Installation of Buried Flexible Pipe

AS 2638 Sluice valves for water works purposes – Metal Seated

AS 2685 Safe Working in Confined Space

AS 2832 Cathodic protection of metals - Pipes and cables

AS 3500 National Plumbing and Drainage

AS 3680 Polyethylene sleeving for ductile iron pipelines

AS 3681 Guidelines for the application of polyethylene sleeving to ductile iron pipeline and fittings

AS 3952 Water supply - Spring hydrant valve for waterworks purposes

AS 3996 Metal access covers, road grates and frames

AS 4020 Products for use in contact with water intended for human consumption with regard to their effect on the quality of water

AS 4058 Precast concrete pipes (pressure and non-pressure)

AS 4087 Metallic flanges for waterworks purposes

AS 4129 Fittings for polyethylene (PE) pipes for pressure applications

AS 4130 Polyethylene (PE) pipes for pressure applications

AS 4158 Thermal bonded polymeric coatings on valves and fittings for water industry purposes.

AS 4321 Fusion-bonded medium-density polyethylene coating and lining for pipes and fittings

B1.1.4 Safety Standards

As per contract.

B1.2 PLANNING MATTERS, AUTHORITIES COMPLIANCE, PERMITS & FEES

As per contract.

B1.2.1 Regulation of Other Authorities Where the Contractor is required under any Act or under any ordinance, regulation, by-law, order or proclamation under an Act or is required by a person acting in the exercise of statutory powers,


to obtain a written approval to carry out any work under the Contract including issuing a Notice of Intent to conduct excavations to Workcover NSW, then a copy of that approval shall be given to the Principal’s Authorised Person within 5 days of the receipt by the Contractor of such approval.

NOTE: Works approval for the Rail corridor and RMS road reserve will be obtained by the Contractor prior to commencing any construction. This approval must be sought within 7 days of contract award.

B1.3 SITE SECURITY

B1.3.1 Impact on Public Space

The Contractor must liaise with the Principal’s Authorised Person if council reserves or public space is to be used for the placement of site amenities (sheds, site hut, machinery compound) or storage of materials (compound or stack sites). The Contractor is to work with the Principal’s Authorised Person and Council representative to arrange most suitable location of placement of facilities.

B1.3.2 Pre-Construction Meeting

Contractor is to organise a pre-construction meeting on site to discuss construction activities / methods and construction program. Meeting is to include nominated representatives from the Principal.

B1.3.3 Site Security

The site is to be treated as open public space, and precautionary measures shall be taken for public safety, including storage of equipment and access to open excavations etc. The Contractor shall erect temporary security fencing/hoarding at a minimum height of 2 metres around both the storage/amenities sites (may be combined) and excavation to restrict general access during the period of construction works. The type and location of this fencing will require the Principal’s Authorised Person’s approval before erection and no excavation work shall occur until the site is secure.

B1.4 CONTRACTOR’S DEPOT

The Contractor shall obtain approval from the Principal’s Authorised Person for use of an area as a site depot and material storage if required. The depot area shall be fenced with lockable gates and shall be maintained at all times in good condition to the approval of the Principal’s Authorised Person. The gates shall be locked outside working hours.

B1.5 ‘AS CONSTRUCTED’ INFORMATION

As-Constructed drawings and field notes are to be produced by the contractor, including co-ordinates for all inground pipes at 20 meter centres, Flushing Points, Air Valves and Isolation Valves. As constructed photographs are to be taken with a GPS locator camera.

The contractor shall verify all underground services exposed during the works and document this information on the Work As Executed drawings.

B1.6 OTHER SERVICES LOCATIONS The contractor is responsible to obtain and verify the location of all service authority assets including, water, sewer, communications, Railways and RMS services and structures, gas, optical


fibre and stormwater before the start of any works at site. Where required, organise meetings on site with service authorities’ representatives prior to construction that may affect their services. The contractor is required to verify locations and the Invert level of all underground services and electrical cables and controls within the impact zones of the Works. The cost of repair, relocation or verification on any operating underground service is to be borne by the contractor.

B1.7 WORKS PROGRAM

The works program will need to be agreed with the Principal’s Authorised Person.

B1.8 WITNESS AND HOLD POINTS

A witness point shall mean a point in the construction or verification process at which an activity is to be observed by the Principal’s Authorised Person. 48 hours’ notice is required to be given by the Contractor for a witness point. A hold point shall mean a point in the construction of verification process beyond which the work may not proceed without the authorisation of the Principal. 48 hours’ notice is required to be given by the Contractor for a hold point, except for hold points to be carried out at the manufacturers’ premises which requires 7 days’ notice, or where specified as longer elsewhere in the Specification. Witness and hold points are to be scheduled for normal working hours of the Principal’s personnel. If personnel are required at other times, then the Principal may require the Contractor to pay for the overtime costs of the personnel. The Principal’s Authorised Person may, without penalty, convert hold points to witness points on a temporary or permanent basis. The Contractor’s inspection and Test Plans for the Works shall include, but not be limited to, the following witness and hold points inspections by the Principal’s Authorised Person. Include additional hold and witness points which are considered necessary for the Contractors verification such as mandatory inspections by Statutory Authorities.

ITEM CONTROLPreparation and submission of Construction planning documentation - Management Plans, Works Program and insurance documents

Hold

Dilapidation Reports including survey Hold Submission of O & M manuals Hold Submission of WAE drawings Hold Accreditation of operators for pipe welding and PSU installation Hold Joint testing as per specifications Section 2.5 Hold Pressure testing of pipework Witness All pipework rising or grading from an air valve RETICULATION NETWORK Calibration of welding equipment - monthly Witness Pipes and ancillary equipment prior to construction Hold Pipe trench / bore set-out prior to excavation Hold Pipes and ancillary equipment prior to backfilling Hold Testing of pipework Witness Air valve installation Hold Valve and flushing point installation prior to backfilling Hold All interfaces with the community and private property works Hold Compaction of all road excavations Witness


B2 GENERAL TECHNICAL SPECIFICATION

B2.1 GENERAL

The arrangements and general details as shown on the design drawings may not show specific details of all elements associated with the project. The Contractor needs to assure themselves that they have all of the documents and that they are the latest copy of any such documents/ drawings. Any information involving accurate measurements and set out of the pressure sewer main shall be taken at the site.

It shall be understood that the drawings accompanying this specification are intended to show the general arrangement and the intent of the work to be undertaken. However, it is the Contractor’s responsibility to provide a complete and fully functioning system complying in all respects to codes (as amended) and The Principal’s requirements. All materials and items shall be installed in accordance with manufacturer’s recommendations.

B2.2 CONSTRUCTION ACTIVITIES

During the construction phases the Contractor shall be responsible for the following: -

• Conformance with the design and documentation of the completed pressure sewer system; • Obtaining all authorities’ approvals for the works; • Provision of on-site supervision of the Works; • Pre construction Dilapidation Survey • Arranging and conducting progress meetings, keeping minutes thereof, and submitting a copy

to the Principal’s Authorised Person; • Performance monitoring of construction activities, with an emphasis on Work Health and Safety

and Customer Focus, is to be completed on a fortnightly basis and the Principal’s Authorised Person shall be advised of the results;

• Acting as the contact point for customer queries and complaints with respect to the Works, and ensuring resolution in a prompt and sensitive manner in consultation with and to the approval of the Principal’s Authorised Person;

• Monitoring the progress of the Works and maintaining adequate field records, which must include written records of instructions and observations, and photographs as appropriate as well as a complaints register. Work As Executed documentation is to be progressively marked-up by the Contractor and reviewed with the Principal’s Authorised Person at their request. The field records and the complaints register must be made available for inspection by the Principal’s Authorised Person upon request at:

o The end of each construction stage; o Each coordination meeting

• The submission of all applicable construction certification checklists; and • The submission of all applicable Completion Period checklists and information. • All construction activities will need to ensure that they are in accordance with the standards laid

out in this construction specification and associated documents.


B2.3 CONSTRUCTION DRAWINGS

With respect to the construction drawings the following points need to be observed by the Contactor who will be responsible for ensuring that the following occurs:

• Any changes to the collection system design proposed by the Contractor must be approved by the System Designer – Pressure System Solutions Pty Ltd prior to commencement of that part of the Works. The System Designer’s approval may be indicated in writing or by the signing of amended design drawings.

• The installation of collection mains, property laterals and BK’s are constructed in accordance with the final design drawings and the Contractor will need to ensure they have the final design drawings.

• The final design drawings are to be marked as ‘Approved For Construction’ (AFC) and be dated and signed by the System Designer. Any subsequent amendments will be marked with an “Amended Drawings Description” including the amendment number and date, along with the Designer’s signature indicating they support this change. If the drawings are not clearly labelled as such the Contractor should bring this to the attention of the Principal’s Authorised Person.

• Any plan produced as a Work As Executed drawing, without the Designer’s signature on any significant amendment, will be rejected as will be the handover of the works. Details in respect of costs associated with this process will be deemed to be included in the Tender price.

• The Contractor needs to satisfy them self, particularly if they discover they have different plan issues, that the quantities for materials such as pipe lengths are accurate and that they have ordered sufficient pipe lengths.

B2.4 PIPEWORK AND FITTINGS

Polyethylene pipes are to be PE100, PN16 and fittings shall be PN16 and used for the property network pressure lines. All PE pipe shall be manufactured in accordance with current AS/NZS 4130 – Polyethylene Pipes for Pressure Applications. All PE fittings for polyethylene pipes shall be manufactured in accordance with current AS/NZS 4129 (Int) - Fittings for Polyethylene Pipes for Pressure Applications. Installation shall be in accordance with current AS/NZS 2033 - Installation of Polyethylene Pipe Systems and in accordance with current AS/NZS2566.2 – Buried Flexible Pipelines – Installation. Reference shall also be made to technical installation manuals produced by Vinidex and Georg Fischer.

Polyethylene pipes and fittings shall be used for all boring locations and shall be a minimum specification of PE100, PN16 and shall also be of sufficient strength to use in the boring process without any short or long term effect on the material and maintain the manufacturer’s full product warranty. No joints are to be installed in a bore unless prior written approval is gained from the Principal’s Authorised Person. If this is unavoidable the section of pipe shall be tested, above ground in accordance with this specification prior to inserting into the bore hole.

Polyethylene fittings and jointing shall be by either electro fusion or butt welded fittings. It is critical that all manufacturers recommended jointing procedures be adhered to.

Only black polyethylene pipe with a cream stripe as detailed in WSA-02-2007 is to be used for pressure sewerage system applications. Any black pipes with other coloured stripe are NOT to be used under any circumstances. Should the Principal’s Authorised Person discover any of these mains inadvertently laid with other coloured stripe on them it will not accept handover until the pipes have been replaced with pipes that comply with this colour coding of sewerage pipes.


All changes of direction shall be undertaken using 45 degree and/or sweep bends.

B2.5 JOINING THE PIPES

All pipes are to be joined by electro fusion techniques in accordance with the manufacturer’s recommended jointing procedures. Those carrying out pipe jointing are to be appropriately qualified with applicable certification, capable of demonstrating their experience with these techniques, have the right equipment to affect the welds and conduct all such welds in accordance with the pipe manufactures recommended jointing procedures. Prior to the installation of thermal fusion joints in the ground, the joints have to cool to ambient temperature.

The Principal’s Authorised Person will inspect the quality of the welds and will witness the welding processes from time to time. Defective welds, if discovered, may lead to uncovering of pipes and a reinspection of all welds at the Contractor’s cost.

The Principal’s Authorised Person reserves the right to instruct the Contractor to cut out sample welds for inspection.

All equipment such as electrofusion jointing machines shall be correctly calibrated with appropriate current certification. These calibration certificates shall be provided to the Principal’s Authorised Person each month.

B2.6 CAPPING OFF

During pipe laying construction, all open ends of pipes are to be strictly capped off to prevent the entry of foreign matter into the pipework. This must occur at the end of each day and / or during inclement weather conditions and /or where there is a likelihood of water charged soils entering the pipe during periods of non-work (e.g. rest breaks etc.).

B2.7 EXCAVATION

B2.7.1 Trenches Left Open

In relation to the excavation of the pipe trenches, the following guidelines should be adhered to:

• No trench should be left open overnight, unless approved by the Principal’s Authorised Person. • The minimum possible length of trench should be left open at any time with the trench

backfilled once the pipeline is laid and any lateral spurs cut in. • Where it is desirable to leave open a key point for subsequent installation of other material etc.,

these should be provided with covers that reasonably prevent entry from members of the public and/or animals.

Barricading (and night lights if required) is to be used, where any trench needs to be left exposed

B2.7.2 Timbering and Dewatering

Where trenches and pits are to be excavated in granular soils or as required by the local authorities, shoring, timbering and planking etc. is to be erected and be of sufficient strength and quality to prevent earth and other material entering the excavations. All excavations are to be maintained free of water.


B2.7.3 Anchorage Of The Pressure Main

Anchorage of the pressure mains at bends and changes of direction shall be in accordance with WSAA standard drawings WAT – 1205 and WAT-1207-V where necessary.

B2.7.4 Excavation Generally

Trenches are to be excavated to lines and grades as shown on the drawings. Unless noted otherwise make the trenches straight between surveyed changes of direction with uniform grades, trench bottom and vertical sides.

B2.7.5 Pipe Protection

The pipe can in most instances be backfilled with the excavated material from the trench, where the trench has been dug by a trenching machine such as a ditch witch. This assumes that the trench is excavated in suitable soil conditions (no rock) and that the soil is relatively clean and free of foreign matter and abrasives. Use of this material needs to be agreed with the Principal’s Authorised Person.

Where rock, gravel or similar is encountered in the trench or in any circumstances where any pieces of foreign matter that might puncture the pipe are present, then the pipe is to have a minimum of 100mm of sand backfilling on all sides. Where sandfill is required the trench is to be excavated an additional 100mm in depth with the pipe to be laid on top of a sand bed. The trench excavation will need to be wide enough to allow for this 100mm of sand filling around the pipe.

Where it is difficult to gain the minimum depth due to excavation difficulties, the pipe may be encased in a minimum 100mm of concrete subject to the case by case specific approval of the Principal’s Authorised Person. The trench will need to be widened to accommodate this encasement. Where there are loads that may lead to a shear failure of the pipe such as when it may traverse under a retaining wall a minimum 100mm thick reinforced concrete slab will be laid over the pipe to protect it from such shearing actions. The specific requirements here may alter from case to case and will need to be determined by the Principal’s Authorised Person.

B2.7.6 Bedding of Pipes

Bed all pipes with not less than 100mm compacted thickness of approved compacted granular material having high permeability and high stability when saturated, free of organic matter and shall conform to the grading in accordance with Australian Standards and as detailed in this document.

Samples of the types of materials intended to be used shall be submitted and approved by the Principal’s Authorised Person prior to their use. No bedding material shall be placed until the excavation has been inspected and passed by the Principal’s Authorised Person.

After the trench has been approved the bedding material shall be placed and compacted to depths shown on the drawings. The bedding material shall be placed and compacted to 95% AS standard compaction in layers not exceeding 150mm.

B2.7.7 Backfilling

Pipe trenches and pit excavations shall be backfilled and compacted to the satisfaction of the Principal’s Authorised Person with granular material in layers not exceeding 150mm in depth and in accordance with The Principal’s specifications.


Road crossings shall be tested and certified for compaction at the bottom of the road sub-base level for a minimum 100% AS standard compaction, with a minimum frequency as detailed in section 4.13.2. In other areas trenches shall be tested and certified for a minimum of 95% AS standard backfill.

All trenches are to be backfilled as soon as possible after the pipeline has been laid, tested and accepted.

Where the base of the trench is in gravel and or a rocky material, which might denigrate the performance of the pipeline, bed all pipes in accordance with clause B5.27.11 “Bedding Of Pipes”.

Where excavation is to occur in rocky material that is not readily dislodged by the trenching machines (or a larger model of these machines), the minimum depth requirements may be waived in favour of the pipelines being laid in 100mm of concrete encasement on all slides. Each of these will be determined on a case by case basis and a formal approach must be made to the Principal’s Authorised Person.

Requirements for Backfilling

Backfill to pits and pipeline trenches, hardstand area and roads shall comply with the following requirements:

The fill to be used shall be clay bound, free of organic and compressible material and be able to be placed into a dense mass free of open voids and cavities. The soil shall also be free of brickbats, soil clumps or rock greater than 75mm across the largest dimension. The fill shall be easy to compact and have liquid limit not exceeding 70.

B2.8 COMPACTION AND TESTING

B2.8.1 Compaction requirements

Compaction moisture content shall generally be 1% dry to 2% wet of the optimum.

Compact the soils to the following minimum standard dry density ratios (AS1289.5.4.1) for cohesive materials and density indexes (AS1289.E6.1) for cohesionless soil:

Description of Work Minimum Compaction

AS 1289.5.4.1 AS 1289.E6.1 (1) General filling around site 95% standard 60%

(2) Fill supporting structural loads (i) greater than 0.5 m below

foundations (ii) top 0.5 m

98% standard 100% standard

70%

80%

(3) Excavated sub grade supporting structural loads

100% standard 80%

(4) Pipework embedment and backfill (i) in and under embankments (ii) under roads (a) <500 mm below surface of

98% standard 100% standard

70%

80%


pavement (b) >500 mm below surface of

pavement

98% standard

70%

(5) Road pavement 95% modified 65% (6) Backfill and structures 95% standard 65%

Determine in-situ dry density by sand replacement method (AS 1289.5.3.1).

Record all tests performed, including defined location details for each in-situ test.

B2.8.2 Testing

Have the following inspected and certified as complying with the specification and submit to the Principal’s Authorised Person:

• Suitability of sub-grade. • Foundation preparation. • Suitability of material for compacted fill. • Suitability of material for clay lining. • Earthworks compaction. • Road works.

B2.9 DEPTH AND LOCATION OF PIPEWORK

All pipework is to be laid in accordance with the Principal’s standards. The pipe will be laid to a depth where there is a minimum cover over the pipeline of:

• Private Property o 450mm cover where NOT exposed to any vehicle traffic. o 600mm cover where exposed to light vehicle traffic. o 600mm cover otherwise.

• Public Domain o 750mm cover where exposed to light vehicle traffic in the footpath or road verge. o 750mm cover in roadway sealed/unsealed. o 1200mm cover where under RMS road. o 1500mm cover where under table drain (stormwater dish drain) in RMS road reserve. o Pipe cover in open drains and where erosion is occurring will need to be backfilled with

400mm of concrete. This factor is to be discussed with the Principal’s Authorised Person and agreement reached if this concrete backfill is required.

Excavation is to be via rubber tyred or tracked trenching equipment.

It is intended that the excavated material will be used to backfill the pipe trenches and pit excavations and this will require the Principal’s Authorised Person’s approval prior to the use of this material. Where rocky ground is encountered these depths will need to be varied to accommodate bedding materials.

Where other services have been installed in the pressure sewerage allocation in the road reserve, these will be dealt with on a case by case basis. As a general principle however, it is proposed to cross these services as close to perpendicular as possible. The depth of the pressure sewerage


pipeline in these instances will be varied to suit the particular circumstances. Separation shall be as detailed in WSA 02-2004 or as detailed on the design drawings.

B2.10 HORIZONTAL DIRECTIONAL BORING

B2.10.1 General

The drawings require some areas of the pipe network to be constructed by horizontal boring. Items detailed in this section are also to comply with the entire specification.

Work items associated with this form of construction method include, but are not limited to, the following:

• Establishment of worksites each side of the bores. • Design of bore and detail alignment. • Co-ordination with all existing services and site conditions. • Design of boring mud/grout for tunnel construction and support as required. • Design of polyethylene pipe profile to suit pulling methods. • Boring of bore/micro-tunnel by horizontal directional boring methods. • Containment and disposal of boring mud/grout and boring waste in compliance with statutory

requirements. • Compliance with requirements of Government Departments and with legitimate affected

stakeholders. • Temporary works needed to carry out the Works shall also be provided by the Contractor. • Attachment of stainless steel tracer wire to bored pipework. • Pressure testing of pipework prior to installation in accordance with this specification. • Commissioning of system. • Provision of Bore logs (chainage and pipe depths) and Work As Executed documentation.

B2.10.2 Environmental Regulations

The Environment Protection Authority in NSW has strict controls in relation to emissions into the environment and the Contractor is responsible for identifying the control limits and complying with all relevant requirements.

In particular, all necessary care and precaution shall be taken to ensure that bentonite boring mud and cuttings do not discharge at the surface or into any water body or water course. If discharge occurs, boring shall cease. Recommencement of the work shall only be undertaken after suitable remedial actions have been implemented.

At the completion of boring (or during boring if necessary), all boring mud and excess water together with borehole cuttings shall be disposed of in a manner approved by EPA, Council and the Principal’s Authorised Person.

B2.10.3 Contract Information

The information contained within this specification and associated design drawings is not warranted or guaranteed to show completely the existing above ground or subsurface conditions


over the whole of the bore route. The Contractor shall make its own interpretations, deductions and conclusions from the information made available and site inspections and shall accept full responsibility for such interpretations, deductions and conclusions.

This proposed pipe route is provided for tender purposes only and serves to indicate the Contractor’s minimum requirements. The Contractor is responsible for determining the geotechnical nature of the pipe route and for designing the route in plan and profile. Under no circumstances shall the profiles be designed / installed with reverse curvatures. The Contractor’s determinations and pipe route design shall be deemed to be represented and included in its Tender Price.

The Contractor shall also be responsible for determining the presence and location of all assets owned and managed by property owners, statutory authorities and service providers and for implementing the care and reinstatement of these assets to the full satisfaction of the relevant owners, authorities and managers.

B2.10.4 Requirement

Construction by Trenchless Technology is to be in accordance with the relevant sections of WSA 02 – 2002, as well as this Specification. All construction shall be carried out in accordance with the Construction Environmental Management Plan, the approved Work Method Statements and the approved Safety Plan.

B2.10.5 Location

Where applicable, the Contractor shall use trenchless construction techniques in the locations deemed appropriate. The Contractor shall choose the alignment to minimise potential for damage or disruption to public or assets as far as is practicable. Changes in alignment from the plans will be in consultation with Principal Authorised Person.

B2.10.6 Alignment Restrictions

The Contractor shall construct the pipeline as shown on the Drawings. If the Contractors proposed method of pipeline installation requires the pipeline to deviate from the alignment shown, or require any structure to be constructed in alternative locations, or for any of the Works to extend beyond the limits of the Site, the Contractor shall provide full and accurate details of additional working areas, and/or alternative and/or additional shaft or pit locations for the Principal’s review prior to proceeding.

B2.10.7 Equipment

All machinery shall be selected to minimise noise, vibration and nuisance to the public and shall comply with EPA noise requirements.

B2.10.8 Launching and Receiving Pits

B2.10.8.1 General The Contractor shall design and excavate the launch/receiving pits/shafts in accordance with WorkCover NSW requirements and the Contractor’s OH&S requirements.

B2.10.8.2 Sheeting, Shoring and Bracing The launch and reception pits shall be constructed to allow the safe operation of plant, equipment and handling of materials. They shall be designed by the Contractor to withstand the loadings imposed by ground pressure and superimposed loads from surface mounted equipment.


B2.10.8.3 Dewatering When installed below the water table, interlocking sheet piles and/or a dewatering system shall be employed to keep the shaft dry at all times. Measures shall be taken to prevent surface runoff from entering the shaft. When shaft excavation is carried out regular checks shall be made, in conjunction with the Principal’s Authorised Person, to compare the volume of material removed with the calculated volume, as a safeguard against excessive loss of material beyond the planned excavation limits.

B2.10.8.4 Foundation Launch pits shall be dry and firm to provide a suitable base for support and alignment of the boring equipment.

B2.10.8.5 Boring Fluids and Cuttings

The Contractor shall use an appropriate boring fluid to suit the ground conditions as may be encountered on site during the boring, reaming and product pipe installation operations. Details of any boring fluids proposed for use and the estimated volumes to be used are to be submitted to the Principal’s Authorised Person prior to the commencement of boring. Boring fluids to be used shall be environmentally sound and biodegradable. Boring fluid pressures shall be limited to those necessary and shall be controlled to avoid or minimise hydraulic fracturing or over excavation. If hydraulic fracturing or excessive loss of fluid is discovered, the process shall be halted until actions are taken to control the losses. Boring fluids and cuttings shall be recovered and separated and the boring fluid reused. The Contractor shall be responsible for the disposal of excavated material as well as excess boring fluid, water, trash, and waste. Containment barriers shall be used to prevent boring fluid runoff from the construction site and frequent inspections along the bore path for upwelling boring fluid shall be conducted. Clean-up of any inadvertent returns shall be performed in a timely manner. The Contractor shall take extreme care in minimising the loss of boring fluids into the ground or the environment. Returned fluids shall be properly contained, reclaimed and recirculated. The Contractor shall detail the precautionary measures to be undertaken to minimise the impact of any inadvertent spillage of fluids on return or at exit of the bore. Cuttings and spent boring fluids shall be disposed of properly and shall comply with all Commonwealth and State Acts. The Contractor shall detail the methods to meet these aforementioned requirements in the Safe Work Method Statements.

B2.10.8.6 Slurry Disposal

Used slurry shall be disposed of in accordance with local environmental regulations. B2.10.8.7 Spoil Removal

The excavation and disposal arrangements shall be capable of dealing with the full range of materials expected. Generally, the disposal system shall accommodate material produced by the cutting equipment. A trap may be provided for the retention of pieces of material which would otherwise cause damage to or stop up the disposal system. Systems incorporated into slurry machines shall be provided with means of accurately controlling and adjusting the density and viscosity of the medium supplied to the pressure chamber and introducing additives where required. Pipework, pumps and separation plant shall be designed to accommodate the maximum rate of advance at which the machine will be progressed. The separation plant shall be such that an assessment of the nature and volume of excavated material


can be made. The Contractor shall be responsible for the removal and disposal of any excess spoil from the site to a Principal approved disposal site.

B2.10.9 Pipe Jointing

Polyethylene pressure pipe shall be fusion jointed in accordance with Section B2.5

The Contractor shall submit to the Principal’s Authorised Person, the proposed jointing procedures where directional boring is being used, not less than 7 days prior to the intended start of production jointing. No jointing shall commence until the jointing procedure has been approved by the Principal’s Authorised Person.

During adverse weather conditions, such as high winds or rain, the Contractor shall protect the joints from sudden variations in temperature. The protection of the joints shall remain until the completion of the joint cooling period.

B2.10.10 Butt Weld Joint Testing

NOT USED.

B2.10.11 Pipe Installation

B2.10.11.1 Pipe Placement by Horizontal Directional Boring

The Contractor shall ensure that during the pulling operation the conduit shall not be damaged by pulling forces or tunnel cave-in. The conduit string shall be suitably supported during placement to ensure that bending moments during placement are minimised. Where the conduit enters the drill hole, cranes and roller supports shall be provided as necessary to limit bending stresses in the pipeline string.

B2.10.11.2 Acceptance of Placement

An additional three-metre-long pipe length shall be butt-connected at the leading end of the pipe. After the pipe has been pulled through the bore exposing the three metre extra length of pipe, this length shall be examined by the Principal’s Authorised Person and the Contractor together. If the pipe length is significantly damaged to the extent that the function of the pipe length would be unacceptably impaired during the design life of the pipe, complete replacement of the pipe will be required at the cost of the Contractor.

B2.10.11.3 In-Situ Conduit Protection and Location Markers

In consultation with the Principal’s Authorised Person and any other stakeholder authority, suitable warning notices and markers shall be supplied and installed by the Contractor to identify the location and depth of the conduit at the inlet edges.

B2.11 RESTORATION

B2.11.1 General

The Principal is committed to enhancing its relationship with the community by providing excellent service particularly in the area of site restoration. Consequently, The Principal expects the Contractor will assist in achieving an increased level of service and satisfaction.


The Principal requires that the site is kept in a safe, clean and tidy state and those unsightly items such as spoil stockpiles and barricades are kept to a minimum.

The Contractor shall:

1. Maintain the site in a clean and uncluttered state and remove excess spoil from the Site each day.

2. At the end of each work day level trenches and leave a safe work site. 3. Where possible, load excess material directly into trucks during the construction of

the Works and remove the material offsite or to a suitable stockpile location that has been agreed with the Principal’s Authorised Person.

4. Limit the need for barricades by backfilling openings or installing secured covers, where possible, before leaving the Site each day.

5. Maintain stockpiles in a neat and tidy manner and provide adequate drainage and silt traps as required by the EPA and Council.

6. Manage the ordering and delivery of quarry products to the Site thus minimising the need for stockpiling materials on-site.

7. Maximum duration before site restoration is 7 days in compliance with approved development standards. The Contractor is further encouraged to limit the impacts of the Works on the community by keeping the length of disruption to a minimum. Consequently, the Contractor shall restore the Site progressively and as soon as possible and shall not defer restoration work until the end of the Contract.

8. The Contractor shall be responsible for cleaning up the Site and removing and properly disposing of all debris and excess materials resulting from its activities. The Contractor shall leave the Site in a tidy and presentable condition, which shall include reinstatement of roads, footpaths, structures, vegetation or other facilities that have been disturbed during, and as a consequence of the Works.

9. Where the Contractor fails to carry out the required works within the specified time, the Principal’s Authorised Person shall carry out the work at the Contractor’s cost.

B2.11.2 Guidelines for Reinstatement

The Contractor shall minimise the level of disturbance to the Site by the use of non-destructive construction techniques such as boring under paved areas and under trees as appropriate.

The guidelines described in this Sub-clause shall be read in conjunction with any other requirements imposed by Council and/or authorities as part of their Road Opening Permit.

The Contractor shall reinstate the Site according to the requirements of the Principal’s Authorised Person. The cost for reinstatement shall be deemed to be included in the lump sum tendered.

The Principal’s Authorised Person may direct alternative methods of reinstatement for any of the packages of the Works. Alternative reinstatement directed by the Principal’s Authorised Person will be negotiated as a cost variation and shall be agreed between the Contractor and the Principal’s Authorised Person prior to reinstatement work being undertaken.


B2.11.3 Grassed Areas

The Contractor shall minimise damage to existing grassed areas by careful and effective management of excess excavated material.

The Contractor shall restore areas damaged as a result of the Works to an equivalent or better condition than existed prior to the commencement of the Works. The Contractor shall use quality materials and shall match the particular grasses in the area.

The Contractor shall ensure that re-seeded areas are appropriately watered during the initial germination period.

The Contractor shall return after 4 weeks to check on progress of the restoration. If the grass seeds have not germinated, the Contractor shall apply additional top soil or grass seeds until the area is revegetated.

B2.11.4 Restoration in Trafficable Areas

The following should be observed in relation to restoration in trafficable areas. Where the pipeline is constructed in road reserves, the width of the trench shall not exceed 0.6m.

The Contractor shall carry out all work within road reserves in accordance with the Specification and relevant requirements of The Principal. Details of the requirements for work in road reserves and charges as set by the Council are available from Council and refer to their Plan 4400-A.

• Council requires 7 days’ notice prior to road openings occurring and the restoration must be completed to Council’s standards.

• A free corridor shall be provided along all footpaths and person access ways of minimum width one metre.

• The gravel base of bitumen-paved surfaces shall be restored using gravel material to a minimum compacted thickness of 200mm.

• For gravel surfaces, including road shoulders, restoration shall be carried out using gravel material to a minimum compacted thickness of 100mm.

• In the case where a compacted depth of gravel greater than that specified above is required to achieve a pavement strength equivalent to that pre-existing, then the Contractor shall provide a greater compacted depth of gravel as is necessary to achieve such equivalent strength and the cost thereof shall be borne by the Contractor.

For concrete and modified concrete pavements all joints at the extremities of restored areas shall be saw cut and have bitumen-impregnated fibreboard installed prior to construction.

B2.12 QUALITY SYSTEM

As per contract.

B2.13 QUALITY MANUAL

As per contract.


B2.14 INSPECTION AND TEST PLANS

As per contract.

B2.15 QUALITY TESTS

As per contract.

B2.16 QUALITY AUDITS

As per contract.

B2.17 TRACEABILITY

The Contractor shall maintain records clearly identifying the source of materials and equipment, the test results, design drawings used for the construction of the Works, and the place and time of delivery to store or to site. Each piece of equipment or material shall be assigned a distinct identification that will be consistently used or referred to in the quality records.

B2.18 QUALITY RECORDS

• Quality records shall be stored and maintained such that they are readily retrievable in facilities that provide a suitable environment to minimise deterioration or damage, and to prevent loss. Quality records shall be available for evaluation by the Principal’s Authorised Person during the period of the Contract and shall include all pertinent Contractor or secondary consultant records.

• Quality records shall be retained by the Contractor for seven (7) years from the Date of Completion.

• The Contractor shall maintain records in two categories:

a) Test Records - comprising all working sheets associated with testing, in accordance with the Inspection and Test Plans.

b) Project Quality Records - which shall include, but not be limited to, site meeting minutes, technical reviews, minutes of meetings between Principal and Contractor, and where necessary with Sub Contractors, and other relevant documentation.

• The Contractor shall submit to the Principal’s Authorised Person quality records as evidence

that the work has complied with the specified quality requirements. These records shall include summaries of inspection and test results, and shall be submitted within twenty-four (24) hours if unsatisfactory, and seven (7) days if satisfactory.

• Prior to Completion the Contractor shall make available a register of all quality records held. The Contractor shall supply copies of all quality records or parts thereof as required by the Principal’s Authorised Person.


B2.19 INSPECTION

The Principal’s Authorised Person shall be given access in conjunction with or through the Contractor to all laboratories and other facilities used for quality control tests to verify that specified requirements are being met.

B2.20 MATERIALS AND WORKMANSHIP

All equipment, materials and accessories used in this contract shall be new, shall conform to the appropriate current Australian Standard Specification and shall comply with Local Authority requirements. Materials or operations not covered by referenced Standard Codes and Specifications shall conform to the appropriate Australian Standard, or if no such Standard exists they shall conform to the standards laid down by the local authority. If conflicting information arises, the highest Standard shall be adopted.

B2.21 IDENTIFICATION OF STAFF

In order to promote public safety, all personnel working on site must carry appropriate identification.

B2.22 CUSTOMER QUERIES AND COMPLAINTS

The Contractor shall be the contact point for all customer queries and complaints relating to the Works being executed under this Contract. Queries and complaints must be resolved promptly, and in a sensitive manner. Any contentious issues raised during the works are to be the sole responsibility of the Contractor and the Principal’s Authorised Person shall be notified and kept fully briefed on such issues.

B2.23 OWNERSHIP

Ownership of all plans, drawings, documents, specifications and survey information shall vest in The Principal at the completion of the Contract and remain the property of The Principal.

B2.24 CLEARANCE

The Contractor shall obtain a letter of satisfaction (‘Clearance Certificate’) from landowners before completion of any on-property works can be achieved (e.g. Boundary Kit installation etc.). This does not relieve the contractor from responsibility of further restoration if warranted.

B2.25 IDENTIFICATION AND TAGGING OF NEW PLANT AND EQUIPMENT

The Contractor shall label / tag, all new plant and/or equipment installed on site under the Contract with a unique asset code. The code details will be provided by the Principal’s Authorised Person.

Assets to be labelled / tagged under this contract include but are not limited to:

1. Valves (Normally open and Normally closed valves to be tagged as such) 2. Air Valves 3. Flushing Points


4. Scour Points 5. Pits.

All tags / labels shall be stamped 316 stainless steel and permanently attached to the asset.

The Contractor shall record each asset code provided on the 'As Constructed' drawings against respective assets. The Contractor shall include asset information in the Operations and Maintenance Manual.


B3 SPECIFIC TECHNICAL SPECIFICATION

B3.1 GENERAL

This section covers the specific requirements for the construction of the reticulation network including set out of the works, supply of materials (including pipes and excluding items listed in B3.8 Materials to be Supplied by the Principal), excavation, installation of the collection pipes, Boundary Kits, fittings, valves, detection tape (or trace wire), bedding, backfill, compaction, spoil disposal, shoring (as necessary), dewatering (as necessary) etc. and any works required to maintain a safe work environment.

B3.2 PRELIMINARIES, PLANNING, SURVEY INVESTIGATION AND DESIGN

As part of the pre-construction activities the Contractor will need to:

• Walk the proposed pipeline routes and familiarise themselves with the design plans and proposed layout of the pipelines.

• Identify other existing services in the ground that may interfere with the construction actions. This may involve potholing existing services to determine exact location and depths.

• Determine what areas might need to be directionally drilled. • Identify any unique site conditions, which might require specific solutions.

B3.3 ELECTRICITY AND STREET LIGHT POLES

All pressure sewerage system piping within 2000mm of such poles and braces shall be installed using boring technology unless otherwise agreed with the Principal’s Authorised Persons representative. The location of all pressure sewerage system mains shall be reviewed and approved by the Energy authority’s site representative prior to construction. If this review is not undertaken the pressure sewerage system pipe shall be laid within a conduit extending 2000mm each side of such poles.

B3.4 ROADWAYS, CONCRETE FOOTWAYS AND AREAS OF VEGETATION

In respect to the roads and pavements it will be expected that the Contractor would in their construction activities:

• Limit the extent of damage to road pavements and concrete footways as much as practicable and shall construct the sewer main by horizontal directional boring where possible.

• Reinstate the trenches in accordance with the relevant authority’s requirements where open trench or openings are made in pavements. Temporary bituminous seal shall be applied to all paved surfaces and concrete footways. The Contractor shall also apply temporary seal to backfilled work no later than the end of the following day and ensure all areas are sealed before the weekend.

• Maintain roads and pavements in a safe, clean and tidy condition during construction. Materials from the Works, crushed rock, spoil, mud etc., must be kept from being inadvertently spread to adjacent paved areas. The Contractor shall inspect the Site each day prior to leaving the Site and shall ensure that paved areas are kept in a safe, clean and tidy state.

• Implement Erosion Control Measures - To the approval of the Principal’s Authorised Person.


B3.5 CONCRETE DRIVEWAYS

The construction of the pressure sewerage mains under these driveways shall be by horizontal directional boring as much as practical. If open trenching is adopted, the reinstatement shall generally be extended to the nearest construction joint but must comply with the relevant authority’s requirements. Temporary seal shall be in bitumen. The Contractor shall apply temporary seal to backfilled work no later than the end of the following day and ensure all areas are sealed before the weekend.

B3.6 PIPEWORK ON PUBLIC PROPERTY

Most of the collection system will be installed on public property. For example:

• Flushing and scour points shall be located and spaced as shown on design documentation. Flushing points shall be offset to the side to minimise any threat of damage to the pipe. They shall be equipped with a 316 Stainless steel isolation valve and shall be housed in a suitable concrete valve pit for protection and easy access.

• Air valves are to be located at high points in the network or rising main as indicated on the design drawings. These valves are to be housed in a chamber (kiosk) as indicated on the design drawings.

• Isolation valves shall be located as shown on the design drawings. In any event isolation valves shall be located on branch lines where they join to main lines. Isolation valves shall be housed in a valve box with a cast iron cover. An isolation valve shall also be located at the discharge point of the pressure sewer line.

• Tapping saddles or tees are to be provided where property service lines join collection mains shall have a bore the same internal diameter as the property service line.

B3.7 MATERIAL / PIPES ETC

The Contractor will be responsible to ensure that the materials are ordered in a timely manner so as not to compromise the suggested works program. If there are problems with material suppliers, then the Contractor should notify the Principal’s Authorised Person of any potential delays that are beyond their control at the earliest possible date.

The words ‘pipe’ and ‘piping’ used in this document shall mean all pipes, fittings, valves and accessories connected thereto. All pipe dimensions are external diameters unless otherwise specified. Pipework is to be installed so as to avoid conflict with other works. All bends, offsets and fittings required to achieve this, are not shown on the design drawings however are deemed to be included in the contract.

All pipework, fittings and other general items are to be installed in accordance with the manufacturer’s recommendations.

B3.8 MATERIALS TO BE SUPPLIED BY THE PRINCIPAL

The following materials will be supplied by The Principal 1. E-One simplex pressure sewer unit including pump, tank, control panel and connecting

cable between the control panel and pump. Cable length to be confirmed by the contractor to the Principal for procurement 10 weeks before being required.

2. E-One Quad pressure sewer unit ditto above.


3. Boundary kits (except for 50mm boundary kit) 4. Type 1 flushing points. NOTE: Type 2 FP to be supplied and installed by the

contractor.

B3.9 MATERIALS TO BE SUPPLIED BY THE CONTRACTOR

The Contractor will be responsible for the supply of all materials required for the construction of the works, excluding items listed in B3.8 Materials to be Supplied by the Principal. These will include the network mains for the pressure sewerage collection system, all other materials and equipment required to deliver a properly constructed pressure sewerage system that will be:

• Tested for performance • Commissioned to code and manufacturer’s standards • Approved and Handed Over to The Principal to their requirements as detailed later in this document • Completed in its restored surrounding • Had any defects rectified (Post Completion Period). All materials supplied by the Contractor for incorporation in the Works shall be approved materials obtained from an approved source of supply. All materials supplied for incorporation in the Works shall also be in accordance with this Specification, the Drawings, and/or the relevant Water Industry Technical Standard Specifications and/or Drawings.

B3.10 MARKING THE PIPES

The location of pressure sewerage pipes is to be marked in the following areas: -

• Supply and lay Sentry line detectable tape 300mm above the soffit of the pressure sewer pipe in the trench. Where pipe is to be inserted into a bore hole, attach a continuous 2.0mm 316L stainless steel MIG wire to the pipe to assist in detecting the service pipe after installation.

• Test the integrity of all tracer wire sections to the satisfaction of the Principal’s Authorised Person.

• Pipes are to be laid at the standard depth. Where the main is laid at depths greater than the standard depth, this will be marked clearly on the collection mains plan.

B3.11 REPAIRS TO MAINS

Where such repairs are required these will be achieved through either crimping of the pipe or the isolation of a section of pipe using various isolation valves (property and collection system).

All repairs will be in accordance with the methods of repair for PE pipes as defined by the pipe manufacturer and the defined Australian Standard for that pipe.

B3.12 FLANGES

Flanges are to be utilised to connect pipework (50mm diameter and larger) to items of valves, plant and equipment, so all plant and valves can be easily removed and maintained.


All bolts utilised to fasten flanged joints are to be manufactured from minimum 316 grade stainless steel with “never seize” applied to all threads and be suitable for 1600kPa pressure.

B3.13 VALVES

All valves of any particular type will be obtained from the same manufacturer and be resilient seated.

Valves are to be suitable for a system pressure of 1,600kPa. Valves located in ground are to be installed with a cast iron path box with a UPVC pipe riser to surface level.

Valves that are operated via valve keys are to have a key supplied by the Contractor with each set of valves, i.e., 1 valve = 1 valve key to be supplied by the Contractor.

B3.14 ISOLATION VALVES

All isolation valves (other than for individual property connections) shall be AVK, Tyco (or equal), resilient seated sluice type, rated 1,600kPa, suitable for sewage application and be CLOCKWISE CLOSING. Isolation valves are to be either flanged or factory fitted with PE stub pipe ends.

Isolation valves are to be installed generally at a maximum depth of 800mm measured from the finished surface level to the pressure sewerage valve pipe centre line.

B3.15 AIR RELEASE VALVE

Air valves are to be installed as shown on the design drawings. These shall be above ground type with pipe work and support fixtures mounted inside a fibreglass kiosk – refer design drawings for specific details.

NOTE: pressure sewerage mains to provide continual rise to the air valve location in areas noted on the drawings.

B3.16 FLOW METER

Provide a 1,200 x 900 precast concrete pit with Class C cover for installation of IP68 rated ABB Watermaster flow meter with remote readout and data logger.

B3.17 PRESSURE SEWER COLLECTION SYSTEM INSTALLATION

The collection system is those mains that extend from the Limit Of Contract (LOC) up to and including the Boundary Kit on properties nominated on the design drawings.

B3.17.1 Basic Layout

Collection pipework generally involves:

• The laying of the main, which should be in a fixed allocation for sewerage mains in the road reserve i.e. in accordance with these documents and specified Standards.

• Laying the main down one side of the street, with properties on the opposite side of the road connected via designated road crossings.


• Formal connection of a pipe from the collection main to the property Boundary Kit, including the installation of the Boundary Kit.

• The collection mains are to incorporate flushing points, air valves and isolation valves in accordance with the design drawings.

• The line is to be appropriately marked as a pressure sewerage main, when constructed. • Restoration and production of Work as Executed drawings for The Principal’s records. In some locations the pressure sewerage main will be required to be laid on grade to provide a path for air to travel to air valves. These locations are shown on the design drawings.

In most locations the main is not required to be laid on grade and it will be laid at a similar depth to other services, including water. It is to be appropriately colour coded and have a marker tape laid above it to ensure it is not confused with any other mains. If there are other non-sewage pipelines installed also in black (only) polyethylene in a particular location, the Principal’s Authorised Person may re-evaluate the minimum depths and allocations for the mains with the Contractor/ Pipe-layer.

B3.17.2 Collection Design Interface

Given that the pump’s life will ultimately be governed by its duty head as well as mechanical aspects, there must be no alterations to collection pipe sizes (as shown on the design drawings) without a full certification of the changes by the System Designer. Pipe designs are to be based upon commercially available pipe sizes and delays in delivery will not be an acceptable reason for altering any pipe sizes.

B3.17.3 Permits and Pre-Requisite Plans

Before commencing any activities, the Contractor is to:

• Obtain permits such as for road crossing that may be required. These include Railways, RMS and Council. Note: These permits must be sought immediately following award of contract.

• Obtain any other permits required, for example, if the pipeline route is near a major telecom cable etc.

• Prepare a Traffic Management Plans in acoordance with current Authorities requirements. • Prepare an Environmental Management Plan. • Prepare an Safe Work Method Plan. • Confirm the availability of the pipelines in the sizes and lengths specified. These permits will need to be sighted by the Principal’s Authorised Person before construction work can commence.

B3.17.4 Supervision and Inspections

Work shall be undertaken under the direct supervision of appropriately qualified personnel. Inspections by the Principal’s Authorised Person will be required, but not limited to the following stages: -

• Construction Planning Review Prior to Construction. • Pipes and ancillary equipment prior to construction. • Pipe Trench / bore set-out prior to excavation • Valve, flushing point installation prior to backfill. • Pipes and ancillary equipment in trenches prior to backfilling


• All Pressure Test Witnessing and Sign-Off • At each stage of Air Valve System construction • At all interfaces with community and private property works. • Compaction of all Road Excavations. B3.17.5 Site Conditions

The following represent the typical site considerations that need to be taken into account when carrying out these works

• The Site will vary along the route of the pipeline. The construction activities will therefore need to be as harmonious with the surrounding environment as possible.

• Where the Works are in close proximity to private property, the Contractor shall bear the responsibility of liaising with the occupants of each property affected.

• The Contractor shall obtain permission for access to properties prior to entering private properties. Access shall be maintained to all properties at all times unless otherwise agreed with the owner/occupier. Temporary structures may be required; such as ramps over a temporary hose system or covers over holes. All such requirements and costs shall be met by the Contractor to the satisfaction of the Principal’s Authorised Person.

• All work is subject to standard reinstatement procedures required by The Principal and/or private property owners and others. Prior to commencing any work in road reserves or public areas, The Principal is to be notified and the necessary permits obtained.

• Barricades and lights are to be placed around all open excavations and shafts. All open excavations and shafts are to be covered and secured using appropriate materials and methods when the Contractor is not on site. If the street access is blocked, then the Council and emergency authorities (i.e. fire, police, ambulance, etc.) must be notified.

• All work in road reserves is to have appropriate road signage in accordance with the relevant Roads Authority Code of Practice and the Contractors approved traffic management plans

• Prior to the commencement of the Works the Contractor shall undertake pre-inspections and photo documentation of the area of the Works. These photos are to be electronically recorded in the following file structure: -

o Street name o Street Number o Date of Photo

• These photos are to be submitted to the Principal’s Authorised Person prior to commencing any work in that area.

• These photos are to be maintained by the Contractor until 12 months after the completion of the Post Completion Period.

B3.17.6 Collection System Installation Procedures

The following steps are seen as a minimum approach that must be carried out by the Contractor, in constructing the collection system. The steps provide a logical sequence to enable an efficient construction program to commence with minimal disruption to the surrounding environment. If the Contractor wishes to amend this installation methodology, they will need to convince the Principal’s Authorised Person of the benefits of the new installation procedure.


1. Complete, obtain and submit all QA information/ documentation for approval (Traffic Management Plans, Environmental Management Plans, OH&S Plans etc. for approval by the Principal’s Authorised Person).

2. Submission of a Works Program, indicating a detailed timetable of activities as well as the resources and plant to be used.

3. Ensure all community issues are addressed and resolved with the Principal’s Authorised Person.

4. Ensure all pipes are approved by the Principal’s Authorised Person and then ordered in sufficient time so that all sizes are available before construction commences. Similarly order the fittings, valves, etc. so these are also available.

5. Ensure all road and railway crossing approvals required for the project are secured before construction commences and copies are forwarded to the Principal’s Authorised Person.

6. Confirm all drawings are the Approved For Construction (AFC) drawings.

7. Confirm the location and layout of the pressure sewer collection mains.

8. Confirm the length and position of any directional boring that is to occur on the project.

9. Confirm the location of any spur lines that might be required.

10. Confirm the location of any flushing points and valves as required.

11. Gain approval for any proposed pipeline markers to be used on the project.

12. Undertake dilapidation survey of the proposed work area prior to commencing work as follows:- Take photographic/ video evidence of pre-existing conditions on all areas of proposed construction and areas surrounding the proposed construction area, prior to any works commencing.

13. Erect traffic signage where applicable.

14. Locate all other services and expose these where necessary.

15. All work to be carried out in accordance with the OH&S and Environmental Management Plans submitted to the Principal’s Authorised Person, where required.

16. Excavate trench to depth, to provide required cover for pipework with excavation to be carried out by rubber tyre or tracked trenching machinery. Alternatively, the lines may be directionally bored.

17. Install the pipe as per this specification and the relevant Australian Standards. A tracer wire to be installed with pipework for subsequent location purposes.

18. Install the marker tape during backfill.

19. Where test points are to be left exposed, barricading is to be erected around all open trenching, all other trenching it to be closed at the end of each day.

20. Flush pipeline prior to testing.


21. Pressure test installed pipe work, as per relevant Australian Standards.

22. Leave tested pipeline full of water.

23. Complete backfill and compaction of trenches.

24. Install pipe location markers.

25. Site is to be restored to a condition similar to that which existed before the works commenced, as can be practically achieved.

26. Check the performance of the system.

27. Carry out any rectification works if required.

28. Formally hand the main over to the Principal’s Authorised Person, along with all Work As Executed package.

B3.18 ROAD CROSSINGS

B3.18.1 Design and Construction Standards

Road works shall comply with, (but not necessarily be limited to), the requirements of the following, Austroads (Roads and Traffic Authority’s) and NAASRA Standard Specifications.

Where the pipeline crosses a road, a watercourse or the construction of the line involves requirements that are under the control of any Authority, the work shall be carried out in accordance with the requirements of that Authority for such work.

B3.18.2 Road Access

Maintain all existing access roads and all new roads for the duration of the Contract.

Restore all existing access roads to their original conditions at the end of the Contract.

B3.19 FLUSHING POINTS

The collection system will contain a number of flushing points where water can be added or sewage extracted from the system in sufficient volumes to allow the cleaning of the collection network.

These are to be installed as per the design drawings.

B3.20 RESIDENTIAL ACCESS/ DRIVEWAYS

Where the access driveways are traversed by the pipeline and these driveways are made of the following materials, the pipeline will be under bored for the crossing.

• Sealed surfaces (irrespective of nature). • Paved Surfaces • Decorative Surfaces


Where there is no defined driveway and the pipeline is installed by open excavation then the driveway is to be compacted as soon as possible to minimise the loss of access to the property. No resident should be denied overnight access to their properties.

The Contractor needs to provide a minimum of five working days’ notice to any existing residents, prior to constructing the works in the street and inform residents how it might impact their access.

The Contractor may provide this notice by letterbox drop, but the information should include:

• Date the works to be constructed. • Estimated time pipe trenches are to be open. • Contact numbers for further resident enquiries. • Method of excavation for the driveway. • Estimated time the driveway will be unavailable.

B3.21 LOCATING THE PIPELINE

The location of the collection pipes is to be marked in the following ways:

• A tracer wire that is capable of being energised is to be laid with the pipeline during boring and trenching at a similar level to the pipe.

• A marker tape indicating that a pressure sewerage pipe is laid 300mm below the tape is to be included in the pipe trench. The tape is to be brightly coloured and have the words “pressure sewerage pipe” printed on it or at least the letters “PS”.

• All pipes and their location are to be marked on the Work As Executed (WAE) drawings.

B3.22 OTHER SERVICES

Although every effort has been made to locate existing services it can be assumed that not all details of the existing services have been established. The cost of re-connection and/or repair of all existing services shall be deemed to be included in the tendered amount and no additional payment will be allowed.

The Contractor is required to walk the proposed pipeline route and determine the proximity of other services to the pressure sewerage lines. Where other services are parallel to the pressure sewerage mains and these intrude into the pressure sewer allocation, the Contractor will need to work with both the Principal’s Authorised Person and the other service providers to stay inside the allocated area for the pressure sewerage systems for the project.

Where these other services are also in black polyethylene pipe, then the marker tape needs to clearly indicate the pressure sewerage pipe to minimise any potential confusion. The matter must be discussed with the Principal’s Authorised Person before a final decision is made.

Where the pressure sewerage main is to cross other services the depth and nature of these services is to be determined prior to construction and the pressure sewerage main may be either raised over or taken below these services. This decision will be made with the Principal’s Authorised Person and the Contractor with reference to the collection system designer, if required. Existing services need to be crossed as close to right angles as possible.

Underground Services


• It is the Contractor’s responsibility to prove the location of all underground services shown on the design drawings as well as to locate any additional services not shown on the design drawings.

• Damages to any service shall be made good at the Contractor’s expense.

B3.23 CONSTRUCTION PRACTICES

If the pipe must be stacked for storage, such stacking should be in accordance with the pipe manufacturer’s recommendations. The pipe should be handled in such a manner that it is not damaged.

Segments of pipe having cuts or gouges in excess of 10% of the wall thickness of the pipe shall be cut out and removed. The undamaged portions of the pipe shall be re-joined using the electrofusion joining method. Sections of polyethylene pipe should be joined into continuous lengths on the job site above ground.

The joining method shall be electrofusion and shall be performed in strict accordance with the pipe manufacturer's recommendations. The electro fusion equipment used in the joining procedure shall be capable of meeting all conditions recommended by the pipe manufacturer, including, but not limited to, fusion temperature, alignment and fusion pressure. Fused segments of pipe shall be handled so as to avoid damage to the pipe.

When lifting fused sections of pipe, chains or cable-type chokers should be avoided. Nylon slings are preferred. Spreader bars should be used when lifting long, fused sections. Care should be exercised to avoid cutting or gouging the pipe.

B3.24 LOCATION SET OUTS

The lateral spur connection to the collection main shall be at 90 degrees to the property boundary.

The property boundary kits shall be 1000mm inside the property line that runs parallel to the collection mains and 1000mm inside the nearest side property boundary or as detailed on the design drawings. The Contractor must ensure that the Boundary Kit is installed within the property boundary with the dimensions as shown in the Plan of Sanitary Drainage. Any conflicts must be reported to Principal’s authorised person

B3.25 TESTING OF THE MAINS

The testing of the collection mains is effectively about making sure that the collection mains are in working order and able to be handed over to the Principal. All pressure testing of the pressure sewerage mains shall conform to WSA 07-2007 Pressure Sewerage Code – Clause 21.4, 21.5, 21.6, 21.7 and 21.8 and as follows: -

• Hydrostatic tests are to be performed progressively. The pressure sewerage main and branch pipes are to be hydrostatically tested at a pressure of not less than 1,600kPa.

• It is not necessary for welded joints to be left exposed on a buried installation. However, flanged and mechanical joints should be left exposed to enable visual inspection during hydrostatic testing. If, at any stage during the hydrostatic testing, an unacceptable leak is detected, all flanged/mechanical joints should be inspected. If these are found to be satisfactory then inspection of the welded joints is required. Hydrostatic testing each section of pipework is a required inspection hold point. the Principal’s Authorised Person is required to


witness and sign-off on each tested section of pipework and it is the Contractor’s responsibility to coordinate required inspections.

• To allow the release of air while filling the pipe with testing water the installation of a testing manual air release valve will be required at local high points. The Contract will be required to determine the location of the above based upon construction staging, test sections and local high point locations. Other appurtenances may also be use such as boundary kit test tees and network air valves.

• Prior to testing, the entire polyethylene pipeline should be checked to ensure all debris and construction materials are removed from contact with the pipes and fittings. Where thermal fusion jointing has been used, no testing should take place until the joints have completely cooled to ambient temperature. Local authority regulations may differ between each other in the pressure testing routines, and their individual requirements must be followed at all times. The Contractor therefore needs to adhere to any particular requirement from the Principal’s Authorised Person before commencing on works.

• When pressure testing, introduce the test water slowly into the polyethylene pipeline, until all air is purged out of the line and water flows freely at the other end of the line.

• The pressure testing shall be considered satisfactory if: -

a) There is no failure of any pipe, fitting, valve, joint or any other pipeline component during the pressure test.

b) There is no visual leakage during the test.

c) Maximum allowable losses are within the limits stated in the Code

d) The Principal’s Authorised Person witnesses and approves the tested section of system.

• All test results are to be recorded in tabular form indicating the pipework section number and

the water pressure at the start and the end of the test period. All defects shall be rectified at the Contractors’ expense and to the satisfaction of the Principal’s Authorised Person.


B3.25.1 Pipeline Pressure Testing Results Sheet: Rising Mains Project: The Rock – Pressure Sewerage Scheme

Street/Section/Zone:

Contractor:

Contractor’s Testing Responsible Officer:

Important Notes:

1. All pipelines shall be hydrostatically tested using WATER only. Testing of pipelines using air is not permitted due to the risk of catastrophic failure.

2. System Test Pressure (STP) = 160 metres head (1600kPa), Design Pressure (DP) = 60 metres head (600 kPa). 3. Two full working days’ notice prior to the test is to be given to the Principal’s Authorised Person. 4. All pipes are to be cleaned before testing. 5. The test rig is to have two calibrated pressure gauges, both of which have been calibrated within the last three

months and the calibration results forwarded to the Principal’s Authorised Person. Both gauges must read inside 5% of the test head and of each other.

6. Testing procedure to be read in conjunction with WSA 07-2007and current WorkCover guidelines. Pipeline Pre - Testing (Pressurise pipeline to 75% of system test pressure for at least 12 hours prior to the system pressure test). Date: Time: Max. rated pressure of pipeline

kPa 75% of System Test Pressure

kPa

Pre-testing reading (Initial) kPa Pre-testing reading (Final) kPa Does the pipeline sustain the pre-testing pressure: YES / NO Initial: System Test Pressure Testing Maintain system test pressure for 5 hours (minimum) measuring at hourly intervals. Record readings below.

Date: Time: Max. rated pressure of pipeline kPa System Test Pressure kPa Time 1 hour 2 Hour 3 hours 4 hours 5 hours Pressure (kPa) Water Added (L)

• Confirm each valve sustains full test pressure • Confirm visual inspection of the line for leaks.

(Use aural or electronic assistance if a leak is suspected but not observed.)

Initial: Initial:

Maximum Allowable Loss Rate Vall = (0.14* d*L*H) / 1000 Litres / Hour where d = internal pipe dia (mm); L = Length of test pipeline (km); H = average test pressure (m) - (Clause 21.4.3 of WSA 07-2007)

L/Hour

Test Passes if ΔV(5h-4h) ≤ 0.55 ΔV (3h-2h) + Vall Is the loss rate less than the allowable rate stated above: YES / NO Initial: Does the pipeline PASS the Pressure Test: YES / NO Signature: …………………………………………. Date:…………………… Completed test result sheets to be submitted to the Principal’s Authorised Person with the as-constructed information / construction certification list.


B3.26 INITIAL FLUSHING OF SYSTEM

All collection mains are to be flushed with water so that all foreign matter is removed from inside the pipe prior to being put into operation. After the system has been tested and prior to the system being put into operation each section of pipe work shall be flushed with clean water at a minimum velocity of 1.0 m/s for a period of time sufficient to change the water in the pipe 3 times.

Record the volume of water flushed, the flushing technique adopted and submits to the Principal’s Authorised Person for approval.

B3.27 WORK AS EXECUTED

At completion of the testing process and upon receiving acceptance from the Principal’s Authorised Person, the Contractor shall provide the Principal’s Authorised Person with computer generated plots of the pipe together with coordinates of each pipe to the requirements and approval of the Principal’s Authorised Person and as follows:

Two standards of ‘Work As Executed’ will be required

1. A1 hard copies of plans and long sections

• Show pipe alignments to boundaries and ties to bends from boundaries

• Show all valves and air valves etc

• Show property boundary boxes

• Show cadastre boundaries and house numbers

• Long sections to show pipe size type and class

• Show surfaces levels and inverts

• Show chainages along main

2. Spatial Digital drawing

• Plan and long sections to be in DXF format

• Co-ordinated to MGA Zone 56

• All levels in AHD

• Show all information as per hard copies

All drawings are to be submitted in electronic format in accordance with council’s ‘work as executed Digital Format’ . All work as executed plans shall be certified by contractor’s authorised person.


B3.28 RESTORATION

B3.28.1 General

The Principal is committed to enhancing its relationship with the community by providing excellent service particularly in the area of site restoration. Consequently, the Principal expects the Contractor will assist in achieving an increased level of service and satisfaction.

The Principal requires that the Site is kept in a safe, clean and tidy state and those unsightly items such as spoil stockpiles and barricades are kept to a minimum.

The Contractor shall:

1. Maintain the site in a clean and uncluttered state and remove excess spoil from the Site each day.

2. At the end of each work day level trenches and leave a safe work site. 3. Where possible, load excess material directly into trucks during the construction of

the Works and remove the material offsite or to a suitable stockpile location that has been agreed with the Principal’s Authorised Person.

4. Limit the need for barricades by backfilling openings or installing secured covers, where possible, before leaving the Site each day.

B3.29 HANDOVER OF COLLECTION MAINS

The Principal’s Authorised Person shall accept handover for the collection mains for a particular collection zone, subject to the following

• Verification that the mains have been cleaned of debris. • Completion of independently verified pressure tests on the collection mains that indicate

compliance with both the relevant standards and the design of the system. • Verification that the mains as installed are of the type and classes indicated in the design

drawings. • Acceptance of the Contractors maintenance manual and Work As Executed documentation

by the Principal’s Authorised Person. • QA documentation is complete and provided to the Principal’s Authorised Person. • Visual inspection of the pipeline to ensure that they appear to be:

o Laid in the correct alignment o Appropriately marked o Appropriately compacted.

A formal inspection of the pipelines will be part of the handover and this is to confirm:

• All fittings (valves, air valves, flushing points, etc.) are in working order. • A flushing program has been attached to the handover application and all flushing points are

working as per the specification. • All connections to the property boundary kits are made. • All trenches are compacted and not subsiding. • All restoration is satisfactory. • All completion / certification certificates have been issued by relevant authorities


• All Work as Executed information is correct. The Principal’s Authorised Person may request that parts of the main be uncovered to assist inspections and this will be at the Contractors costs. the Principal’s Authorised Person will however endeavour to carry out random audits during the works to ensure that the mains that might be uncovered will be minimal.


B4 GLOSSARY OF TERMS

Set out below is a series of commonly used terms throughout this technical specification and other associated technical specifications to ensure a consistency in the interpretation of the document. If there are any other terms that require further interpretation, then this will be provided by the Principal’s Authorised Person.

• Alarm/Control Panel – Small box that houses either or both the electrical controls for the pressure sewer unit and the alarm control system for the pumping unit.

• Boundary Kit – This is a valve box at the property boundary incorporating an isolating valve, flow directional valve and an inspection tee piece.

• Contractor – This is the company/ individuals responsible for constructing the works, such as the collection mains, lateral spurs, on property works.

• Designer – This is the company responsible for the design of the pressure sewerage collection system and the on-property design – Pressure System Solutions Pty Ltd

• Drainage Line – This refers to the on-property gravity sewer pipework. • Flushing Point – This is a formal point in the collection system to which a large supply of

water can be connected under pressure to flush the collection pipelines, or alternatively to remove sewerage from the collection system. Typically, this connection will be to a water (or recycled water) tanker.

• Lateral Spur – This is the continuation of the property discharge pressure line from the boundary kit to the collection system pipeline and includes any road crossings (where applicable).

• Multiple Pumping Units – These are pumping units that have more than one pump located in their storage vessel.

• On-property Works – These are the total works to be carried out on the residential/ commercial/ industrial property and include any excavation, installation, compaction and restoration associated with the following.

- The Pressure Sewer Unit and control panel

- The property discharge pressure line

- Wiring of the pumping unit to the control panel

• Overflow Relief Gully – This is a control overflow device to prevent overflows occurring inside the dwellings on the property, by ensuring that such overflows occur outside of the dwelling. Its arrangements and dimensions are contained in the National Plumbing Code

• PE Pipe – Polyethylene Pipe in accordance with specification – generally PE100 PN16 • Plan of Sanitary Drainage – That plan that shows the works that need to be done on each

property to connect it to the pressure sewerage system. • Pressure Sewer Units (PSU) – this includes the pumps, storage vessel, alarm system, level

switches, etc. and is installed on the property. • Pressure Sewerage Collection (or reticulation) System – the series of pipelines laid in the

streets connecting the properties within the pressure sewerage scheme. • Pressure Sewerage Scheme – This is a different name also often used to describe pressure

sewerage schemes. • Pressure Sewerage Systems – This is a specialist system wherein all of the property sewage

is connected to an on-property pumping unit (or series of pumping units). This dedicated pumping unit incorporates a grinder to reduce solids in the sewage to watery slurry. The pumping unit then discharges through small diameter pipelines laid at minimum depth.


Pressure main collection systems rely on the pressure generated by all the “on property” pumps in the system to move sewage from the pumping unit to the discharge point.

• Property Discharge Pressure Line – The pipeline that connects the on-property pumping unit to the boundary kit.

• Storage Vessel – This is the water tight container in which the on-property pump is located and is typically made from polyethylene or fibreglass.

• Technology Supplier –This may be the manufacturer of the technology or an appointed agent of the manufacturer.

• WAE Drawings – These are the Work as Executed or as Constructed Drawings. • Water Authority – Lockhart Shire Council

the rock pressure sewerage system reticulation network ... · lockhart shire council pressure...

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