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Projects

Waiwai Water Treatment Plant (WTP) Electrical Works

CUSTOMER - Water Authority of Fiji (WAF)
LOCATION - Waiwai, Ba, Fiji
SCOPE - The work included the design, supply and installation of all the electrical power and lighting works for the WTP. The specific tasks include:

  • Supply, install and commission the MV mains cables from Electricity Fiji Limited (EFL) pole to main switchboard.
  • Supply, install, test and commission power to all the key electrical field devices.
  • Install, test and commission the main switchboard.
  • Design, supply and installation of lighting (energy saving LED lights) for the complete plant.
  • Supply and install solar powered yard and street lightingAll the yard and street light poles used renewable materials only.

The installation was such that a standby generator power supply could be retrofitted. Our customer was pleased with our efforts and had this to say “Thanks for the good Job done in Waiewai”. This job was completed months ahead of schedule so the people of Ba could enjoy the benefits of WAF’s new investment in the WTP.

The WTP was inaugurated by the Prime Minister of Fiji.

Savusavu Water Treatment Plant (WTP) Building and Electrical Works

CUSTOMER - Water Authority of Fiji (WAF)
LOCATION - Savusavu, Fiji
SCOPE - The work included the design, supply and installation of all the electrical power and lighting works for the WTP. The specific tasks include:

  • Supply, install and commission the MV mains cables from Electricity Fiji Limited (EFL) pole to main switchboard.
  • Supply, install, test and commission power to all the key electrical field devices.
  • Design, factory acceptance testing (FAT), supply, install, test and commission the main switchboard.
  • Design, supply and installation of lighting (energy saving LED lights) for the complete plant.
  • Design and construct the main switchboard building.
  • Supply and install solar powered yard and street lighting - all the yard and street light poles used renewable materials only.

The installation was such that a standby generator power supply could be retrofitted. Our customer was pleased with our efforts and had this to say “Thanks for the good Job done in Savusavu”. This job was completed months ahead of schedule so the people of Savusavu could enjoy the benefits of WAF’s new investment in the WTP.

The WTP was inaugurated by the Prime Minister of Fiji.

4500m3 Bulk Petroleum Storage Tank for ExxonMobil

CUSTOMER - Mobil Oil Mariana Islands, Inc
LOCATION - Saipan, Commonwealth of Northern Mariana Islands (CNMI)
SCOPE - This project was a design and construction of a bulk fuel storage tank (swing tank which would be able to store all products available at the terminal). PEP designed the tank to API650 and ExxonMobil standards including independent certification by a US Professional Engineer (PEng) and CNMI registered structural engineer.

PEP supplied the pre fabricated tank kit set, onsite fabrication, installation and testing of the tank. The scope also included the blasting and painting works, hydrotesting and installation of nozzles and associated piping. Tank capacity 4500m3.

Malakal Wastewater Treatment Plant

CUSTOMER - Palau Public Utilities Corporation (PPUC)
LOCATION - Malakal, Koror, Palau
SCOPE - This was complete design, build and operations management project. PEP contributed significant value engineering for the customer on this project right from the tender stage. We offered an alternative to the process requested by the client. Our alternative sequence batch reactor (SBR) process was accepted. Later our use of a belt press instead of sludge drying beds was also accepted. The specific scope included several tasks including:

  • Conducting the HAZOP, all process design and P and ID’s.
  • Complete engineering of all civil, building, structural, mechanical, process piping, electrical and controls using PLC and SCADA (with remote access capability).
  • Supply, install, test and commission 13.8/0.48kV power transformer.
  • Design, supply, install, test and commission 13.8kV overhead mains to the transformer.
  • Supply, install, test and commission a standby generator.
  • Design, construct, test and commission the inlet works with step screen for receiving wastewater and septage.
  • Design, construct, test and commission the reactors for the SBR processing unit.
  • Design, supply, install, test and commission a constant pressure decant water system.
  • Supply, install, test and commission and belt press for dewatering the sludge.
  • Design and construct a control building with laboratory, meeting room, office spaces, male/female ablutions, changing rooms and storage space.
  • Design and construct building for electrical room, belt press room and blower room.

The plant is designed for unattended operations. We are also responsible for management of operations and maintenance over a five-year period.

Kinoya Wastewater Treatment Plant (WWTP)

CUSTOMER - Water Authority of Fiji (WAF)
LOCATION - Kinoya, Suva Fiji
SCOPE - The scope was the refurbishment and conversion of the existing defunct SBR into an unattended IDEA plant. This included the demolition of existing infrastructure, concrete repairs to the SBR basins, installation of 6 x 90kW blowers, all stainless steel air piping, ultra fine bubble membrane diffusers, upgrade of electrical switch room building, design supply and installation of new main switchboard, PLC and SCADA controls and buildings to house the new blowers.

The hydraulic system was upgrade with large diameter underground concrete pipes, construction of new concrete water retaining structures (to act as distribution chambers), supply and installation of weirs and the design supply and installation of isolation penstocks.

The digester was refurbished with external coating and new relief valves. Handrails were replaced with aluminium handrails throughout the plant. All deteriorated concrete surfaces were refurbished with specialised coatings throughout the plant.

New inlet step screens were designed, supplied, installed and commissioned. The three trickling filters had all the filter media replaced with new media and the mechanical distribution systems replaced with stainless steel mechanisms. The primary sedimentation tanks (PST’s) also had all the mechanical rotating and fixed bridge assemblies replaced with stainless steel assemblies. All this work was carried out while the existing plant was still operational at full capacity.

Lalomauga Hydro Power Station

CUSTOMER - Electric Power Corporation (EPC)
LOCATION - Lalomauga, Samoa
SCOPE - The project comprised design of all works and the rehabilitation of two 1.75MW hydro power units at Lalomauga Hydro Plant. The main components were dismantled and brought to New Zealand for inspection, testing, refurbishment and return to Samoa. The key works included:

  • Two Francis turbines and all associated mechanical and hydraulic equipment inside the power station which included the main inlet valves (MIV), turbine mechanical controls and cooling system.
  • Two alternators (generators).
  • Design and replacement of existing electro-mechanical governor control systems of the two generators with new programmable logic control (PLC) system and integration with the existing EPC SCADA system.
  • Design and replacement of the power plant’s local supply pole mounted transformer with a pad-mount 50kva transformer connected off the main 22kv bus.
  • Design and replacement of existing AVR with a new AVR system.
  • Design and supply of a new rainwater collection system with 1000L capacity tank and connection with the power station plumbing.
  • Civil works which included the driveway and building refurbishment.

We successfully completed this contract, which was delivered without any lost time accident or environmental breach. In doing so we worked in a collaborative and pragmatic manner with EPC and its other stakeholders which included a first in that due to the Covid 19 pandemic we commissioned the 2 hydro generators remotely from New Zealand. This was a first for Samoa.

Aeration System for Kinoya Wastewater Treatment Plant (WWTP)

CUSTOMER - Water Authority of Fiji (WAF)
LOCATION - Kinoya Suva, Fiji
SCOPE - This was a design and supply contract for the supply of aeration system for the Kinoya WWTP upgrade works. The key equipment supplied included 6 x 90kW blowers and fine bubble diffused membrane aeration systems. The blowers were set up for remote access. These blowers were eventually commissioned during the Covid 19 lockdown. Our engineers at site worked remotely with the Italian supplier to commission these machines.

Fire Water Tanks Foam and Fire Pumps for Sogi Fuel Terminal

CUSTOMER - Energy Division, Ministry of Finance, Government of Samoa
LOCATION - Sogi Fuel Terminal, Apia, Samoa
SCOPE - The work involved the design and supply of two fire water tanks each with a capacity of 125,000 litres, two diesel driven fire water pumps and a foam pump with foam proportioner. We also provided supervision of onsite installation and testing of the firewater tanks.

Diesel Fuel Tank and Fire Water Tank for Salelologa Fuel Terminal

CUSTOMER - Energy Division, Ministry of Finance, Government of Samoa
LOCATION - Salelologa Fuel Terminal, Savaii, Samoa
SCOPE - The work involved the design and supply of one fire water tank each with a capacity of 700,000 litres and one 600T galvanized diesel tank. We also provided supervision of onsite installation and testing of the firewater and diesel tanks.

Fuluasou Hydro Power Station

CUSTOMER - Electric Power Corporation (EPC)
LOCATION - Fuluasou, Apia, Samoa
SCOPE - This project was part of EPC’s renewable energy development and power sector rehabilitation project. This was a complete design and build project where we were involved right from the groundbreaking ceremony. Our work included the following major works:

  • Demolition of the two existing power stations and the steel penstock.
  • Design, supply and build the new power station building with flood protection system.
  • Design, supply, install and test a new penstock which crossed the golf course, a main arteial route and long an existing river.
  • Design, supply and install a flood protection wall to protect the penstock.
  • Design supply and install new intake works which included a new intake screen and all associated works.
  • Geotechnical investigations down to 30m, hydrology studies, establishing design parameters for seismic design and design for the strengthening of the existing dam to New Zealand Society on Large Dams (NZSOLD) standards.
  • Design and supply of an inflatable gate system to raise dam level by up to 2m.
  • Design, supply, installation and testing of all electrical and controls, transformer for stepping up generated power to 22kV, new underground mains and 22kV interconnecting switchgear.
  • Design, supply and installation of SCADA systems with remote operating capability and connection to the existing EPC systems.
  • Design, supply, install and commission a Francis Turbine generating at 415V with step up transformer to 22kV connected to national grid.
  • Design, supply and construct dam strengthening works including new buttresses, shear key and foundations. This included the supply and placement of 520 m3 of concrete.

The power generated was lot more than the guaranteed power output.

4000T Gasoil Tank

CUSTOMER - Total Fiji Limited
LOCATION - Walu Bay, Suva, Fiji
SCOPE - The work was a mix of construction only for the civil works and tank concrete foundation and full design and build for the tank and protection systems.

We designed, supplied, and installed a leak detection system which included a HDPE liner below the tank.

For the tank, PEP designed the tank to API650 and TOTAL standards including independent verification by a New Zealand design verifier and independent certification by a Fiji registered structural engineer. PEP supplied the pre-fabricated tank kit set, onsite fabrication, installation, and testing of the tank. The scope also included the blasting and painting works, hydrotesting and installation of nozzles and associated piping. We also designed, installed, tested, and commissioned a cathodic protection system.

Sewer Pump Station and Gravity and Pressure Sewer Mains

CUSTOMER - Palau Public Utilities Corporation (PPUC)
LOCATION - Koror Palau
SCOPE - We designed and built a submersible wastewater pump station. The scope for the pump station included motor control centre, automatic controls, 13.8/0.48kV step down transformer, 13.8kV HV mains cabling and termination to the national grid. The pump station included a valve chamber and a screen system to ensure large debris were collected and removed so the pumps did not get damaged.

In addition to this we supplied and installed:

  • 500 diameter gravity mains under asphalted road through the busy main street of Koror together with 62 manholes.
  • 160 to 300 diameter pressure sewer mains under asphalted road through the busy roads.
  • Upgrade of the electrical controls for existing pump stations.
  • Various other works improving the existing wastewater pump stations.
  • Completing tie ins to the existing wastewater network.

Vuda 10MW HFO Power Station

CUSTOMER - Energy Fiji Limited (EFL)
LOCATION - Vuda, Lautoka, Fiji
SCOPE - Our work included the design verification and construction of the power station and the electrical switch room buildings. The work also included all the civil works to prepare the area for construction. This included a large amount of excavation and some engineered fill to get the required RL for building works to start. In addition, we installed mechanical and electrical equipment.

Namau Water Treatment Plant (WTP) Building and Electrical Works

CUSTOMER - Water Authority of Fiji (WAF)
LOCATION - Namau, Tailevu,Fiji
SCOPE - The work included the design, supply and installation of the MV mains cables from Electricity Fiji Limited (EFL) pole to main switchboard and power to all the key electrical field devices. We also designed, supplied and installed the main switchboard. The scope also included the design, supply and installation of lighting for the complete plant. All lighting was energy saving LED lights. All the yard and street light poles used renewable materials only. PEP also designed and constructed the main switchboard building. As part of the project PEP supplied and installed solar powered yard and street lighting.

500,000 Litre Fire Water Storage Tank

CUSTOMER - Fiji Electricity Authority (FEA)
LOCATION - Kinoya, Suva, Fiji
SCOPE - The work involved topographical survey, geotechnical investigation, design, supply and construction of the tank foundation. The scope also included the design, supply, installation and testing of a fire water tanks with a capacity of 500,000 litres.

4000T Cold Store and Environmentally Controlled Loadout Area (ELA)

CUSTOMER - Pacific Fishing Company (PAFCO)
LOCATION - Levuka, Ovalau, Fiji
SCOPE - The project involved the following works to construct and commission an efficient cold store for PAFCO at their Levuka facility.

  • Demolition and disposal of existing buildings and foundations from subject area.
  • Geotechnical investigations.
  • Supply from Viti Levu using barges some 22,000 tonnes of GAP 65 engineered fill materials, place, compact and test at site.
  • Design and build a 4000 Tonne cold store to store tuna using FM approved fire rated PIR panels.
  • Design and build an environmentally controlled load out area (ELA).
  • Design, supply and construct a plant room.
  • Associated works including refrigeration plant, electrical power supply, standby generator, controls and SCADA systems.
  • Site yard works including driveways and drainage systems.

3,000,000 Litre Diesel Storage Tanks

CUSTOMER - Energy Division, Ministry of Finance, Government of Samoa
LOCATION - Apia Samoa
SCOPE - Our scope of work was to:

  • Demolish one fire damaged fuel tank and move offsite.
  • Upgrade the hold down bolts system for 2 existing tanks (core drill and epoxy 1000mm hold down bolts complete with new hold down bolt chairs).
  • Remove the damaged half of the roof and part of the shell top strake of one tank, supply and reconstruct the roof and shell.
  • Supply tank kit set and construct, test and paint one new 3,000,000 litre diesel tank.
  • Repaint the damaged and upgrade tanks as required.

All the work was carried inside an operational fuel terminal and wharf.

New Power Transformer for Talelefaga Hydro Power Station

CUSTOMER - Electric Power Corporation (EPC)
LOCATION - Taelefaga, Apia, Samoa
SCOPE - Our work was to design, supply, install and commission a new 0.415/6.6kV generator grid connected transformer. This new transformer was installed in place of an existing transformer. We also refurbished the existing transformer that was taken out.

Touliki Fuel Terminal Fire Upgrade

CUSTOMER - Total Fiji Ltd
LOCATION - Touliki, Nuku’alofa, Tonga
SCOPE - The scope of work was to install and commission a fire water system at the Touliki Terminal in Nuku’alofa. This included

  • Supply, fabricate, galvanise, install and test a fully bolted above ground fire pipework system.
  • Supply, fabricate, install and test PVC and DICL under ground seawater intake pipework system.
  • Design and construct a concrete ring beam foundation for tank.
  • Design, supply, install and test a fire water tank.
  • Supply, fabricate, galvanise and erect pump shed.
  • Mechanical installation including diesel fire pump.
  • All electrical controls.

Fishmeal Plant Upgrade

CUSTOMER - Starkist Samoa Company
LOCATION - Pago Pago, American Samoa
SCOPE - The scope included the following main components:

  • 3D scanning of the onsite plant and equipment to establish piping routes for the new plant.
  • Design and drawing of piping general arrangement and isometrics.
  • Supply, fabricate, install and erect process piping complete with pipe supports.
  • Insulation of steam and condensate piping.
  • Survey of onsite as built situation, design, fabricate, galvanise, supply and erect cooling tower support structure.
  • Removal of redundant equipment.
  • Installation of all new equipment including a 100T fishmeal drier, multiple effect evaporators, process tanks, cooling towers and pumps.

The work was carried out on a 24 x 7 basis and the shutdown was complete weeks ahead of the schedule.

Momi Bay Resort Ltd Wastewater Treatment Plant (WWTP)

CUSTOMER - Momi Bay Resort Limited
LOCATION - Momi Bay, Nadi Fiji
SCOPE - The scope was a turnkey design, build and commission a wastewater treatment plant using SBR technology.

The scope included all process design and P and ID’s and complete engineering of all civil, building, structural, mechanical, electrical and controls using PLC. The key components included:

  • Two streams of SBR reactors complete with aeration equipment, mixers and decanters.
  • Fully automated control system designed for unattended operations.
  • Design, supply, install and commission a 0.415/11kV transformer.
  • Design, supply, install and commission a standby power generator.
  • Supply and installation of a sludge management system.
  • Design and construction of all buildings including electrical room and offices.
  • Fencing of the entire property.

1,000,000 Litre Potable Water Reservoir

CUSTOMER - Water Authority of Fiji
LOCATION - Rara, Labasa, Fiji
SCOPE - The project was the supply of all materials and the construction of 1,000,000 litre potable water reinforced concrete reservoir with roof. The work also included the construction of chip sealed access roads.

In addition we carried out all the bulk excavation, supply and construction of concrete chambers.

3,000,000 Litre (3 no.) Bulk Fuel Storage Tanks

CUSTOMER - Ministry of Finance, Energy Division, Government of Samoa
LOCATION - Apia Samoa
SCOPE - The scope was to supply, fabricate, install, test and calibrate 3 off 3,000,000 litre diesel fuel tanks at the Apia wharf terminal. The tanks were constructed using the jacking method – a first for Samoa.

We also supplied, fabricated and installed all the fuel piping within the terminal.

Satala 38/15kV HV Substation

CUSTOMER - American Samoa Power Authority (ASPA)
LOCATION - Satala, Pago Pago, American Samoa
SCOPE - Our scope was to design, build and commission the 38/15kV Satala Substation and supply the transformers for the Tafuna 38/15kV substation. The work included:

  • Design of the substation electrical works (LV, MV, HV and controls).
  • Design of the substation building and building services.
  • Supply, install, test and commission the 15kV and 38kV switchgear.
  • Supply, install, test and commission 2 off 5/7MVA power transformers.
  • Supply, install, test and commission all metering, protection systems and controls.
  • Undertake the interconnection to the “tie line” between Satala and Tafuna.

Tovata Water Pump Station

CUSTOMER - Water Authority of Fiji (WAF)
LOCATION - Tovata, Suva, Fiji
SCOPE - Our scope of work was to design, supply, install and commission a booster pump at the Tovata pump station. The key elements included:

  • All mechanical, piping and electrical design.
  • Supply, install, test and commission new pump.
  • Supply, install, test and commission new switchboard.
  • Supply, install and test new interconnecting DICL piping.

Matavo Intake Pump Station and Waiwai Gravity Mains

CUSTOMER - Water Authority of Fiji (WAF)
LOCATION - Matavo, Sigatoka and Waiwai, Ba in Fiji
SCOPE - Construction of a wet well water pump station and supply and laying of 4kM gravity mains.

For Matavo intake pump station in Sigatoka the work included:

  • Construction of a 12m deep intake pump station concrete wet well (bottom of well was below river level).
  • Construct coffer dams and build a new intake screen (in river) and interconnecting pipe to wet well.
  • Supply, install, test and commission submersible pumps, motor control centre, 0.415/11kV transformer and all associated controls and wiring.
  • Supply, install and test pressure mains delivery piping to water treatment plant.
  • Design, supply and install gabion retaining walls on the banks of the Sigatoka river.

For Waiwai gravity mains in Ba, the work included:

  • Supply, install and test 4000m gravity mains from the river to the Waiwai water treatment plant.
  • Construction all wash out stations, air relief valve stations and drains.
  • Construction of aerial pipe bridges for gully, river and creek crossings.
  • Construction of all thrust blocks.
  • Supply, install, test and commission flowmeter.

33kV HV Underground Cable

CUSTOMER - Solomon Islands Electricity Authority
LOCATION - Honiara, Solomon Island
SCOPE - The scope of work included:

  • Obtaining soil and backfill materials and testing for its properties to be used in cable design modelling.
  • Design high voltage 33kV cable between Lungga power station and Ranadi substation.
  • Identify and dispose of UXO (unexploded WW2 bombs!).
  • Supply, install and test 33kV underground cable.
  • Supply, install and test a 72 core fibre optic cable between Lungga power station and Ranadi substation.
  • Undertake road, creek, commercial and private property crossings.
  • Protection analysis for the new system.
  • Road restoration works.

All this work was undertaken along the main Kukum highway.

Disinfection Systems for Water Treatment Plants

CUSTOMER - Samoa Water Authority
LOCATION - Alaoa, Malololelei and Fuluasou, Samoa
SCOPE - The work included the construction of three new water treatment plant disinfection systems at Alaoa, Malololelei and Fuluasou Urban water treatment plants and the refurbishment and upgrade of the Fuluasou EU rural plant. The main elements of the works included:

  • Civil works and construction of new buildings to house the plant and equipment.
  • All disinfection plant and equipment such as mixers, mixing tanks, dosing systems, flow meters and agitators.
  • All electrical and controls work including switchboard and automation of chlorination system.
  • Supply and installation of standby generators.

6000T Tuna Cold Store

CUSTOMER - Trimarine, Inc & Samoa Tuna Processors, Inc. (STP)
LOCATION - Pago Pago, American Samoa
SCOPE - This was a design and build project for Trimarine, Inc. subsidiary Samoa Tuna Processors, Inc.

The project involved the following works to construct and commission an efficient cold store for STP at their Pago Pago facility.

  • Earthworks to prepare the ground to the required levels.
  • Geotechnical investigations.
  • Design and build a 6000 Tonne cold store to store tuna using FM approved fire rated PIR panels.
  • Design and build an environmentally controlled load out area (ELA).
  • Design and build an office complex complete with meeting room, ablutions and offices.
  • Design and build a forklift charging room.
  • Design and build a processing area.
  • Design and build a electrical switch room to house the motor control centres, variable speed drives, DC power supply and SCADA/PLC systems.
  • Design and build a standby generator room.
  • Installation of 2 power transformers 15kV/0.48kV and associated HV cabling and ring main unit.
  • Associated works including plant room, refrigeration plant, electrical power supply, standby generator, diesel fuel storage tanks, controls and SCADA systems.

Toa Petroleum Rarotonga Fuel Terminal

CUSTOMER - Toa Petroleum
LOCATION - Rarotonga, Cook Islands
SCOPE - Our scope was to provide the design associated with the relocation of the fuel terminal in Rarotonga. The work also included the design of the fuel pipeline from the wharf to the terminal (shared with Pacific Energy)

In addition to this we provided project budgeting services, project management and contract administration.

Labasa Hospital Water Supply

CUSTOMER - New Zealand Ministry of Foreign Affairs (MFAT)
LOCATION - Labasa Fiji
SCOPE - Design, supply and installation of potable water tank, booster pump and controls for automated filling of header tank. Supply and installation of a new ring mains for potable water supply to the hospital.