Influent Sewage Pumping Station (5 pumps) C of A (page 2 and page 5)

Transcription

1 ( to 5) term: Influent Sewage Pumping St (5 pumps) C of A (page and page 5) Process Process Process 3 Process 4 Process 5 Pump - GE motor, Worthington pump Pump - Toshiba motor, Ebara pump Pump 3T - Toshiba motor, Ebara pump Pump 4 - GE motor, Worthington pump Pump 5 - GE motor, Ebara pump 976; motor changed in rated capacity:,900 l/s@8. TDH, motor 375 kw; 500 HP rated capacity:,535 l/s@9 TDH, motor 597 kw; 800 HP 005 same as pump 976; motor changed in 003 same as pump same as pump Process 6 Pipes and valves 977 Electrical 7 Mostly upgraded in varied Pumps are centrifugal units with positive suction through wedge gates. Pump and 4 should be replaced in the immediate and short term at $300,000 each. Pumps, 3 and 5 are running very smoothly -no noise, no vibr. One () spare 500 HP motor is available (old, emergency spare unit). Pump -3-5 run on high flow only, therefore little running time so far. When pumps and 4 are replaced, all 5 units should require no serious repair or replacement for the dur of the study period. Allow for spare parts in the medium term ($50,000) and the purchase of one () 500 HP motor in the medium term ($00,000) In the wet well: four (4) gates, four (4) actuators. The gates appear in good shape despite age. The gates' actuators should be replaced in the short term: $5,000 each. All panels and VFDs are located in the Control Room. VFDs were between 00 and 005. Allow for the replacement of each VFD once in the study period: $50,000 each, in the short term, in the medium term, 3 in the long term. Replacement of MCCs for the sewage influent pumping st, screen and grit building and clarifiers is planned for in the immediate ($0,000). Allow $0,000 for annual maintenance and repair of all electricals including surge suppressors and voltage filters. OCWA - Engineering Services Page /5

2 ( to 5) term: HVAC 8 Buildings and 9 For the wet well and for the building, stairs and control room. and SCADA Flow meters (5) 005 range from 0-00,000 m3/day; 3 range from 0-50 m3/day. Located downstream of the 5 raw sewage pumps Wet well 977 A new HVAC system was in the wet well in 005, after deficiencies were found in the concrete due to a lack of proper ventil. The major equipment comprise of air conditioning units and make-up air units. Allow for major upgrade of the wet wells and the building and rooms: $50,000 in the medium term. Minor repairs etc. are to be handled under the opers budget. A Milltronics system and high alarm float switches are in place in the Wet Wells. Pumps are controlled by the level in the wet well. Pump operates in sequence in PLC program. Allow for replacement of the PLC and the upgrade of the SCADA system in the study period. The pumps are connected and controlled by the central plant SCADA system. New flow meters were in 005. Allow for replacement of 5 meters in the study period medium term ($00,000). Annual meter calibr is carried out under the opers budget. The appearance of the condition of the wet well is good. The gates appear in good condition despite age. The gate actuator have never been replaced (see section "pipe and valves" above for details on replacement of actuators). It has been reported that there are deteriors in the concrete that are not readily visible. The concrete is becoming weak in spots due to the sewage off-gas and lack of proper ventil. The hold down bolts and clamps where attached to the concrete are becoming loose. Each section of the wet well should be inspected and all hold down bolts and clamps that are mounted to the concrete walls should be tested and reinforced as required (allow for $50,000 in the short term). OCWA - Engineering Services Page /5

3 ( to 5) term: Primary Treatment: Screen and Grit Building C of A (page and page 5) Process Twinned influent channel (pump discharge channel) / Allow for aesthetic improvements of channel in the short term $50,000 Process 3 Primary treatment: bar screens (4) wide influent sewage bar screens,.7 mm bar spacing, and screening capacity of 87,500 m3/day. Screw conveyor; covered rolloff container Process 4 Bar Screen Process 5 Bar Screen Process 6 Bar Screen Mechanically cleaned bar screens (Rexnord), rake/rake wiper (comb): Upgrades were performed in 99, however, no upgrades were done on the bar screens, exhaust fans and gates, which are all dated from 977. The bar screen should be replaced.. Allow for rehabilit of screens and screen drive mechanisms -all four in the study period: two () medium term, two () long term, $40,000 each.. Allow for replacement of chains, sprockets, cogs once in study period- $40, Replace the grit screw conveyor motors once in 0 years- $30,000. Process 7 Bar Screen Process 8 Primary treatment: aerated grit tanks () 977 Process 9 Grit Tank 977 Tanks: 4.3 m * 8.5 m, SWD (Side Water Depth) 4.8 m 3 Deterior was observed in the concrete externally. Cracks have been filled by injection. The concrete should be inspected regularly (every 3-5 years). Replace air diffusers twice in 0 years: allow $0,000 in the short term and $0,000 in the long term. Inspection is covered under the operating budget. Process 0 Grit Tank 977 OCWA - Engineering Services Page 3/5

4 ( to 5) term: Process Pipes and valves / of the 4 screen isol gates were replaced recently. The others are in good condition. No work on these are budgeted in the 0 year period. The actuators on all these gates are new. However, due to the life of these actuators and the environment, allow for replacement of these in the medium term ($,000 each). Allow for change of piping, valves, and other fittings $50,000 once in the study period-long term. Process Screen & Grit Polymer System Process 3 Air blowers () Process 4 Process 5 Process 6 Process 7 Grit pumps () - Gorman - Rupp Grit dewatering Units () -or grit washer, or classifier Odour control units () - Circulaire units Odour control units () - Circulaire units l/s@8. TDH (,38 m3/day) each with 6.7 l/s cyclone and a classifier, solid handling capacity 4 m3/day, common screw conveyor m3/day.78 diameter and 600 mm bed depth activated carbon absorption units (page 6).7 diameter and 900 mm bed depth activated carbon absorption units (page 6) Hopper, mixing tank, stirrer, polymer pumps () (PULSA). Pumps, pipes etc. of the feed system are satisfactory but getting old. Allow for complete replacement of pumps, and mixer etc. in long term. Allow for replacement of each blower: x$50,000 3 Good: One of the pumps has been replaced but the motor was not. Allow for upgrade/replacement of the motors, in the medium and in the long term ($5,000 each). Also replace the older pump in the long term at $0,000. Some problems are being experienced currently due to accumul of grit on the conveyors. There are plans to reorganize the system to reduce/avoid the problems. Allow for $50,000 in the short term. One unit per grit tank. Media has to be replaced: allow for $50,000 in the short term, medium term, and long term. The replacement of each fan motor twice in the study period will be covered under the operating budget. One for grit conveyor and bin area. Allow for replacement of media and for other associated equipment at $30,000/5 year. OCWA - Engineering Services Page 4/5

5 ( to 5) term: Electrical and 99 HVAC 9 HVAC 30 and SCADA - Parshall flume - Flow measurement systems 975 Two () ultrasonic sensors flowmeasurement systems 0-70,000 m3/day and 0-667,000 m3/day at the parshall flume 3/4 The cost for replacement of MCCs for screen and grit building is included in the sewage pumping st section ($0,000 in the immediate). Budget annual replacement and repair: $0,000 beginning in the long term. Replace HVAC related equipment to achieve a proper air exchange rate (one time replacement) in the short term: allow for $00,000. Dosage of Alum, Polymer and Chlorine (chlorine for disinfection until UV is ) is flow-paced from the Parshall flume measurements. Allow for repair and replacement of milltronics in the medium term ($0,000). (calibr is included in the operating budget) OCWA - Engineering Services Page 5/5

6 ( to 5) term: Primary Treatment: Clarifiers (page and page 5) Process 3 Primary clarifiers (4) 977 Process 3 PC m* m SWD 3.5 m Process 33 PC m* m SWD 3.5 m Process 34 PC m* m SWD 3.5 m Process 35 PC m* m SWD 3.5 m Process 36 Pipes and valves Process 37 Process 38 Process 39 longitudinal chain flight sludge collectors () all discharging in a common screw conveyor Scum transfer pumps () (to new DAF thickeners) Automated scum collector actuators (8) (= per clarifier) l/s@6 TDH The sections of the tanks visible above the water are generally in good condition. Reports indicate that the tanks are taken down each summer and cleaned out. Repairs are performed if required. There are some minor cracks in the concrete that have been filled in. These cracks are monitored. The cracks are identified dating from the BAF construction period. See photos. There was an inspection of the concrete in 008 which concluded that there is no need to coat the tanks. Allow for $00,000 in the short term for any repair that may be required as settlement may continue. A new study regarding the cause/effect of the settlement would need to be done in the long term. It would be covered under professional services. 4 inlet gates and 4 actuators ( per clarifier). There are also gates and actuators to by-pass the clarifiers. No works anticipated on the gates for the 0 year period. New actuators were in 005. Allow for replacement of each actuator (6) in the 0 year period at $9,000 each. Flight/rails/chains are reported to be in good condition. Rails were changed from steel to another material that is less susceptible to corrosion and wear. Chains and drive mechanisms are dated from 977. Some parts have been replaced. Allow for replacement/rehabilit of all chains, flights, cogs, drives in long term ($50,000 per clarifier). Scum transfer pumps are almost new. They should require no major repair or upgrade in 0 years. Allow for replacement of each in the long term at $8,000/unit. A new scum collector system was 3 years ago. This new automated system still not working, still under review with Earth Tech. Trough: corrosion coating needed regularly (under operating budget). Need to revamp the system or introduce heating device to prevent the drive mechanism from freezing up: allow for $5,000 in the short term. OCWA - Engineering Services Page 6/5

7 ( to 5) term: Process 40 Rotary drum screen () 99 Maintained on an on-going basis on the operating budget. Allow for replacement in the long term: $5,000. Process 4 Primary sludge pumps (4) l/s 8.9 m TDH motor:. kw; 5 HP; one common VFD 3 The City is waiting on the commissioning of the blending tank in order to define which size of pump will be adequate. Allow for a budget: $5,000 each. Allow also for the replacement of units again in the long term. Process 4 Primary scum tank and four (4) pumps m3; equipped with four (4) cavity pumps 6 l/s@3 m TDH 3 The 4 pumps should be replaced in the short term at $5,000 each. Also allow for change of pipe and fittings with each replacement at an additional $5,000 each. Electrical and SCADA The cost for replacement of MCCs for the clarifiers is included in the sewage pumping st section ($0,000 in the immediate). Allow $5,000/yr for replacement of associated equipment. General instrument, sludge blanket monitoring, etc. Allow for $,000/year. OCWA - Engineering Services Page 7/5

8 ( to 5) term: Alum Dosing Building (page and page 5) Process 45 Alum solution storage tanks (4) - Enviroglas tank m3 The 4 tanks and associated equipment are in a separate building. Two () tanks service the grit tanks, one () tank services the DAF, one () is empty. There are regular improvements to the alum system. In there were improvements to the electrical. Some fiber glass patching has been done. Some minor repairs/upgrades are budgetted for, allow $5,000/year. Process 46 Duplex positive pump for alum dosing () PULSA units and one () small OLMI pump for the DAF system l/min@53 m TDH PULSA pumps are older, OLMI pump is new. Allow for replacement of the PULSA pumps once in study period ($5,000/unit). OLMI pump replacement is covered under operating budget. Electrical 47 HVAC 48 HVAC 3 49 and SCADA 50 Pump controls: Allow for $50,000 in the medium term 4 building heaters: Allow for $0,000 in the short term for replacements. Milltronics (tank levels): Allow for replacement in the medium term ($0,000) and for upgrade of the SCADA system in the long term ($5,000). Overall, the building is in very good condition. Building roof need minor repair. Allow for $0,000 in the short term. OCWA - Engineering Services Page 8/5

9 ( to 5) term: Secondary Treatment: Biological Aerated Filtr (BAF) System Process 5 Secondary Influent Pumps / BAF influent pumps (4) Process 5 Pump 005 Three (3): rated Process 53 Pump 005 capacity 590 to,39 l/s@3.9 to 4. m TDH with 00 kw motors; Process 54 Pump Process 55 Pump Process 56 Secondary treatment: BAF fine screens One (): 3 to 590 l/s@4. m TDH with 45 kw motor.5 m wide fine influent rotary screens and one ().5 m3/h capacity converging screw type screenings compactor Process 57 Fine Screen 005 Process 58 Fine Screen 005 Process 59 Fine Screen Pumps located in the fine screen room. All four (4) pumps are new (005) and should not require any major repair or replacement during the study period. However we have allowed for one () pump replacement in the long term ($60,000). Allow $0,000 per year for repair and replacement of these units. Rotating screen - drive system (3) ; cleaning arm -drive motor (3) ; compactor () ; screw conveyor - drive system (). Replace all five (5) drive motors every 0 years = twice in the study period (short term and long term) $0,000 each = $00,000 in the the study period. Replace screening compactor once in the study period (long term) $30,000 Allow for screen replacement in the short term and again in the long term, $0,000 each time/unit. OCWA - Engineering Services Page 9/5

10 ( to 5) term: Process 60 Process 6 Process 6 BAF tanks: "C" Side (8) BAF tanks: "N" Side (6) unequipped BAF tank () Eight (8) parallel BAF (carbonaceous or 'C') tanks, each 7.85 m x 3.64 m, media depth 3.9 m, media volume 47.6 m3 Six (6) parallel BAF(nitrific or 'N') tanks, each 7.85 mx3.64 m, media depth 3.9 m, media volume 47.6 m3 One () unequipped BAF tank 7.85 m*3.64 m. Change of the air piping support brackets, and oxazur inspection, repair and replacement: allow for $5,000/tank in the short term as well as long term.. Filter media replacement: total of $300,000 in the medium term. Allow $00,000 to equip the tank in long term. Process 63 backwash holding supply tank () 005 One (),670 m3 capacity BAF backwash holding supply tank equipped with 3 pumps ( recircul pump, backwash supply pumps) Replace all 3 pumps once in study period: pump at $0,000, pumps at $50,000 total $70,000 in the long term. Replacement of mechanical seals, packing, other pump repairs and repairs to associated pipe fittings and pipe works etc. are handled under opers budget. Process 64 media recovery screen () 005 Screen ():.5 mm openings, and one () media recovery pump 6 l/s@60 m TDH Allow for pump replacement after 0 years: medium term $,000. Replace system in the long term: $00,000. Annual pump maintenance and repair to screens etc. are carried in the opers budget. Process 65 BAF inter-stage submersible pumps (3) 005 duty, standby, each rated capacity of 567 to 978 l/s@3.8 m TDH (to transfer from "C" side to "N" side) FLYGT pumps. Allow for replacement of each unit once in the study period: $50,000/unit, in medium term, in long term. Process 66 carbonaceous BAF process air blowers (9) duty standby rated with a capacity of 750 nm3/h@80 kpa back-pressure Allow for repair and replacement as required, including air piping and air valves etc.: $,000/year for each blower. OCWA - Engineering Services Page 0/5

11 ( to 5) term: Process 67 nitrifying BAF process air blowers (7) duty standby rated with a capacity of 750 nm3/h@80 kpa back-pressure Allow for repair and replacement as required, including air piping and air valves etc.: $,000/year for each blower. Process 68 BAF backwash scour air blowers (3) 005 each with a rated capacity of 5,000nm3/h@90 kpa back-pressure Allow for repair and replacement as required, including air piping and air valves etc.: $5,000/year for each blower. Process 69 BAF backwash waste tank () 005,960 m3, equipped with two ().5 kw submersible propeller mixers Replace mixers twice in the study period: $5,000 each, medium and long term Process 70 horizontal nonclog BAF waste secondary sludge pump () 005 each with a rated capacity of 37 l/s@8.6 m TDH (~8,000 m3/day) Replace each unit once in study period: $5,000 per unit (medium term). Electrical HVAC and SCADA 005 Two () Magmeters per filter, one () for waste water to DAF, and one () for the backwash cycle Allow for repair and replacement of electrical switches, breakers and other electrical parts $0,000/year The HVAC system at the BAF building comprises numerous pieces of equipment such as unit heaters, fans, make-up air units, exhaust units, hoods, cooling units, control panels etc. A lump sum allowance of $0,000 per year is suggested to repair/replace pieces of equipment as required. Replace magmeters (30) once in the study period $7,000 per unit which is $30,000 in total, split equally into the medium and long term. Allow $6,000 per year for capital work on instrument and SCADA on the BAF system OCWA - Engineering Services Page /5

12 ( to 5) term: Secondary Sludge Dissolved Air Flot Thickening (DAF) System Process 74 Process 75 Process 76 Process 77 Process 78 Process 79 DAF (dissolved air flot): 4 tanks Dissolved Air Flot Tank Dissolved Air Flot Tank Dissolved Air Flot Tank 3 Dissolved Air Flot Tank 4 DAF thickened sludge pumps () Process 80 satur vessels (4) Process 8 Process 8 DAF bottom sludge pump () Polymer mixing system () m*4.5 m and m SWD equipped with one () DAF 005 skimmer and one () bottom sludge 005 collector rated l/s@0 m TDH (transferring sludge to sludge digesters) equipped with four (4) recycle pumps each rated at 34 l/s@43 m TDH and two () reciprocating air compressors rated at 57 nm3/h@,00 kpa rated capacity of 6 l/s@0m TDH (transferring sludge to grit tanks) followed by one (),00 l capacity storage tank and four (4) polymer dosing pumps each rated at 3 l/min These are new and in excellent condition. These tanks would require no work on the exterior, except regular inspection to find leaks or cracks etc. Allow for $,000 per year for all four tanks in the next 0 years (external). Allow for coating the interior of each tank with a liner in the medium term $50,000 per tank Pumps are new. Allow for replacement of the pumps in the 0 year period: long term, $8,000 / unit Pumps are new. Allow for replacement of each unit in the 0 year period: medium, long term, $5,000 / unit. Compressors are new. Allow for total overhaul of air compressors (running constantly, it was reported that there had been problems) every 5 years -change bearings and gaskets etc $0,000 each A spare unit should be provided in the immediate: $8-0,000 per unit. Replace once in 0 year period (long term) Each pump should be changed once in the study period $4,000 per unit long term. The tank and pumps are new and should require little or no maintenance annually. The pipes and associated valves may require some repairs and replacements during the study period. Allow $,000 annually for the repair and replacement. The tanks are likely to last the full study period. OCWA - Engineering Services Page /5

13 ( to 5) term: Process 83 Polymer injection 005 Process 84 Pipes and valves Polymer tanks: tanks,,000 gallons each. Tanks each have stirrers. Allow for replacement of stirrers once in study period (long term) $6,000 each. Polymer tanks at upper level, feeds polymer by gravity to lower level polymer supply tank. Three (3) polymer feed pumps (4 years old). Allow for replacement of each pump once in study period ($3,000 each medium term). Allow for annual repair of each pump (total $,000/year). Allow for replacement of all valves and entire piping in the polymer feed system in the beginning of the medium term ($0,000). Pipes are in excellent shape, requiring little or no maintenance. Mostly stainless steel. Allow for change of valves, actuators, manual gate valves $,000/year Electrical Allow for annual maintenance of panels, switches and MCC for the entire DAF system: $5,000/year HVAC 86 one AC unit in the DAF building 87 and SCADA Comprising of boilers, hot water circulating system, air conditioning units, exhaust fans etc. Includes the hire of external service personnel on a periodic basis. Allow for annual maintenance, repair, replacement $0,000 / year Flow meters, flow and pressure transmitters, PLCs etc: Allow for repair and replacements: $0,000 in medium term and long term. OCWA - Engineering Services Page 3/5

14 ( to 5) term: Digester Feed Blending and Pumping St Process 88 Process 89 Process 90 Sludge blending tank () Sludge mixing pump () Digester feed pump () m3 working volume; to blend primary sludge and secondary sludge prior to digestion rated capacity of 85 m TDH rated capacity of 30 m TDH Not yet. Allow for recoat of the tank twice in the study period (short term and long term), $0,000 each time Not yet. Allow for replacement of the entire equipment in the long term ($40,000). Not yet. Replace once in 0 years: $0,000 /unit, long term. Electrical 9 00 Not yet. HVAC 9 HVAC and SCADA Not yet. Allow for replacement of odour control unit in the long term $0, Allow for replacement/upgrade in the long term: $0,000 OCWA - Engineering Services Page 4/5

15 ( to 5) term: Sludge Digestion Facility Process 94 Anaerobic Primary Digesters (4) Two ().4 m diameter and two () 8.3 diameter; side liquid depth of approximately 7 m, combined storage capacity of 9,770 m3 External condition of all tanks appear to be good. The external surfaces were cleaned and coated in Process 95 Digester 964 /3 Process 96 Digester 964 /3 Process 97 Digester /3 Process 98 Digester /3 Process 99 pipes and valves 3 Process 00 Process 0 Sludge recircul pumps (4) Digested sludge transfer pumps (5) Process 0 Biogas compressors (4) Process 03 Biogas booster () 99 () 998 () Two () rated at 0 l/s@m TDH and two () rated at 3 l/s@9. TDH rated capaciies ranging from 7.8 l/s@6. m TDH to 5. l/s@8 m TDH Rated at 0 l/s@83 kpa, 8.7 kw motors one () rated at 95 l/s@0 kpa, and one () at 7 l/s@ 8.5 kpa There is a maintenance program in place. The tanks are drained in sequence in a 5 year cycle for inspection and maintenance. This includes coating of tanks and inspection of the gas proofing system. Allow $30,000/tank/5 years. Also, allow for replacement of the gas distribution system (distribution+gas mixing guns) for all tanks in the medium term $60,000 per digester. Over the 0 year period allow for change of all valves. Allow $0,000/year for repair/replacement of pipes, fittings, valves, actuators etc. Replace each unit once in the 0 year period $0,000/unit. in medium term & in long term. Replace each unit once in the 0 year period: $0,000/unit in medium term. Replace 4 units in the 0 year period: $30,000/unit in medium term. Replace both units in the 0 year period: $5,000/unit - medium term & long term. OCWA - Engineering Services Page 5/5

16 ( to 5) term: Process 04 Digester sludge heating system 977 Four (4) boilers of 88 kw and 375 kw capacity, four (4) heat exchangers, and four (4) hot water pumps each with a rated capacity of 7.6,., 4., 9.5 l/s 3 Digesters,, 3 & 4 all have the same equipment, except in Digesters 3 & 4 the heat exchangers are older (964), these should be changed in the 0 year period. Allow for the replacement of all 4 hot water pumps in study period $6,000/unit (medium term) and for replacement of the older heat exchangers ($60,000 each) in the long term. Process 05 Waste gas burner () ,400 SCFM /3 The waste gas burner is in a separate building. The insul in this building has started to come off. This burner may not be needed if a cogener system is introduced. However, we have budgeted assuming that the burner would continue to be used. Allow for the following: repair insul ($0,000)-immediate, replacement of building heater and air extraction fan ($5,000)- medium term, replacement of valve actuator on gas regulator ($6,000)- medium term. Electrical HVAC 07 HVAC and SCADA 977 The MCCs and PLCs date back to 977 & 99 respectively. Allow for replacement of all MCCs and PLCs once in the study period. Building heaters in the digester gas rooms: replace in the medium and long term- $8,000. Annual allowance for repair/replacement of heating and ventil equipment of $5,000 inclusive of outside servicing contracts. Gas meters, sludge flow meters, pressure sensors and regulators: allow for annual replacement, repair and upgrade, including upgrades to SCADA system and annual maintenance:$0,000/year OCWA - Engineering Services Page 6/5

17 ( to 5) term: Sludge Dewatering Facility Process 09 Polymer addition system 005 Two () 7,000 l mixing tanks, one () 8,000 l mixed polymer storage tank, three (3) polymer dosing pumps rated 43 l/min 3 Allow for replacement of pumps once in the study period (medium term) at $5,000/each. The feed system comprises of numerous small diameter ball valves and piping (plastic), together with chemical dosing pumps and pressure gauges etc. all fairly new and likely require little maintenance in the short term. However, allow for replacement of pipework and change of fittings in the medium and long term, $5,000 each time. Process 0 Sludge feed pumps (3) 99 each rated at 4 l/s@0 m TDH and. kw motor and VFDs Sludge feed pump: replace once in study period $5,000/unit medium term Process Centrifuge mm diameter and 3,050 mm high rated at 4 l/s (,50 kg/h) Process Centrifuge 99 3 kw motor equipped with a polymer addition Process 3 Centrifuge 3 99 system Centrifuges (manufacturer- Alfa Laval): Allow for replacement of the motors on the centrifuges once on each, in the study period at $50,000/unit medium term and long term. The distribution end on each centrifuge needs replacement shortly. Allow budget $45,000 for each in the short term. Process 4 Dewatered sludge screw conveyors (4) 99 rated capacity of 7.3 m3/h. Two () 30 m3 capacity dewatered sludge cake bin equipped with slide gates to control discharge of cake into roll-off containers. /3 Comprises of long screw conveyors, short screw conveyors, hopper and bins etc. Electrical system was replaced by pneumatic system. Bins are replaced every 5 years at $5,000 each. Also, allow for replacement of motors and gear reducers at $0,000 once in short term and again in long term. Process 5 Diverters shute /3 Process 6 Odor control units () 99.7 diameter and 900 mm bed depth activated carbon absorption units /3 Rebuilt them once in last 5 years. Allow for one rebuild in the medium term at $0,000. Media has to be replaced: allow for $30,000 in the short term, medium term, and long term. (Replacement of each fan motor as required will be covered under operating budget) OCWA - Engineering Services Page 7/5

18 ( to 5) term: Process 7 Heat exchanger 005 /3 Hot water feed to the polymer unit. Allow for one replacement in the short term at $7,000 Electrical 8 99 /3 The electrical equipment needs replacement/upgrade and provision is made for this in the study period. Allow for replacement of VFD on each sludge feed pump (3) once in study period $,000 each. Allow $00,000 in long term for replacement of all panels and MCCs in the dewatering building. Allow $5,000/year for general repair and parts. Main 500 kva transformer (White Westinghouse) to be replaced in study period (medium tem)- allow $60,000. HVAC 9 HVAC 99 /3 0 and SCADA Digested sludge storage tanks () 99 /3 99 capacity of 44 m3, equipped with submersible horizontal propeller mixer Building ventil and heating (6 heaters): Allow for replacement of all heaters during the study period at $8,000/unit. Allow for replacement of exhaust fans on the roof once in the study period ($0,000). Allow for replacement of instruments, sensors etc each year $0,000. Each of the sludge feed lines(3) and the polymer feed lines(3) have a magmeter. Allow for replacement of each magmeter once in the study period: $3,000 for the magmeter on polymer feed line, $6,000 for the magmeters on sludge feed lines. (medium term) Allow for replacement of propeller mixers twice in study period $8,000/unit short term and long term. OCWA - Engineering Services Page 8/5

19 ( to 5) term: UV Effluent Disinfection System Process,500 mm diameter final effluent sewer directing final effluent to a UV disinfection system () 009 tied into the existing final effluent channel No work envisaged on this piping in the 0 year study period. Process 3 UV disinfection system () 009 Trojan Model UV3000 plus; max flow: 69ML/day; consists of two ().5 m*.35 m channels, each channel containing two () banks, each bank containing twenty-four (4) modules, each module containing eight (8) UV lamps = total of 768 lamps. continue on the "Conditon and suggested work" section... Hydraulic system operates the quartz sleeve cleaning system, module lifting system, stilling plates for flow distribution to each channel, four (4) step-down transformers to convert 575 V to 480 V electric supply, water level sensors, one,500 diameter final effluent sewer discharging to the,700 mm final effluent outfall. The UV system is new. However, provision is made for likely replacement of parts/components and upgrades that can be foreseen in the study period. (estimates based on inform provided by EDA Environmental Ltd - installer of the new UV system): allow for $00,000 / year for replacement of lamps, lamps sleeves, electrical upgrades etc.starting in the short term. Process 4 Finger weir () NA No cost estimate at this time. located in the Overflow by-pass Process 5 NA primary/baf effluent weir () channel, designed to Process 6 Electrical 7 Weir located in BAF effluent channel () NA 009 designed top prevent backflow of effluent during BAF backwashing including controls, electrical, and associated appurtenances Should be OK for the 0 year period with regular maintenance (under operal budget) Should be OK for the 0 year period with regular maintenance (under operal budget) Allow for annual amount $5,000/year starting in medium term. OCWA - Engineering Services Page 9/5

20 ( to 5) term: HVAC 8 HVAC 009 AC and make-up air unit: allow for replacement of the AC unit in the medium ($5,000) and make-up air unit in the long term ($0,000). 9 and SCADA UV building () 009 Allow for upgrade and replacement of the system in the medium and again in the long term at $30,000/term. Minor maintenance anticipated on building in the study period: painting, roof inspection, concrete repair etc:,000/year (under operal budget) Existing Chlorine Disinfection System No provision has been made for the existing chlorine system in this report. OCWA - Engineering Services Page 0/5

21 ( to 5) term: Effluent Outfall Sewer Process Process 3 main effluent outfall sewer 3 emergency outfall sewer,750 mm diameter 350 m long,050 mm diameter, running parallel to the,750 outfall sewer Allow for inspection: $5,000 every 5 year. Allow for inspection: $5,000 every 5 year. Stand-by Power Electrical 33 Stand-by power: 900 kw diesel generator () - KATO generators for existing influent sewage pumps The 009 master plan report lays out recommends in terms of capital works on the generator system. Allowance has been made for the recommended budget from this report of $30,000 in the short term and $.6 million in the medium term. Part of the existing system comprises of eight (8) 00 gallon diesel tanks. These are in good condition. All diesel lines appear to be in good condition. No leaks observed. The containment system is adequate and in good shape. Maintenance of these are carried under the opers budget. Electrical 34 Electrical 35 Stand-by power:,000 kw generator ()- G4 600 kw diesel generator () 005 for the new influent sewage pumps for treatment plant utilities Note: G4 is outside of the Influent Sewage Pumping St. G4 and associated diesel tank (double-walled 9. m3). Annual maintenance is covered by operating budget. The study on the loading assignment is complete. No provision made in this report. Maintenance carried in opers budget. Electrical 36 subst with main transformers 004 including all controls, instrument, electrical and associated appurtenances relatively new. Allow for annual replacement and repair of $0,000. Miscellaneous Facilities and 37 laboratory facilities and equipment Allow a lumpsum per year for purchase of new equipment approximately $5,000/year OCWA - Engineering Services Page /5

22 ( to 5) term: Administrative facilities Allow for new boardroom: $0,000 in the immediate. 39 Boilers and 977 /3 40 Boilers 3 and /3 4 Boilers 5 and Associated yard piping, site improvement, heating, ventil, electrical and control system. Old plant (964): room below the administr building Old grit tanks: used for confined space training Old screen room: used for a repair/shop/wieldi ng room. Boilers and : replace them once in 0 year. These service the admin building. Allow $00,000/unit These are in the Boiler room in the basement of the screen and grit building. These service the screen and grit building. Allow for replacement including the gas train, once in the study period: $500,000 in the medium term. Allow for the replacement of hot water pumps in the long term: $60,000. Replacement of burners and electrics, gas valves etc.is covered under the operating budget. Boilers 5 and 6 (Cleaver Brooks units): These are relatively new. Allow for replacement parts and repair during study period of $0,000/year. These service the BAF building. Allow for annual cost of $5,000/year. The old plant was decommissioned in 964. Deterior of the walls is visible. Might impact the building safety. Structural assessment of the building is required but budget will be covered under Professional Services. No budget is included for remedial work at this time. No allowance made No allowance made OCWA - Engineering Services Page /5

23 ( to 5) term: Piping in the tunnels: water, sludge lines. Additions/changes in the pipework, etc, located in the tunnels are usually required due to new construction for new projects, plant expansions etc. Usually when these works are being done some repair and upgrades are undertaken in affected areas in the tunnels. The majority of the pipework is stainless steel and is in good condition. Over the study period allow $50,000/yr for valve and other fitting replacements. There is a project to upgrade electrical equipment to explosion proof equipment in the areas where there are gas lines. No budget has been determined for this and no amount has been included in this report for that activity. 47 Security and Lighting Lump sum to be defined for the whole plant and the three (3) pumping sts (to be covered under opers budget) 48 Concrete remedi on all channels, tunnels and tanks in the plant Based on past experience, Allow for $30,000 / year (consider that as the plant gets older more work may be required) OCWA - Engineering Services Page 3/5

24 ( to 5) term: Pumping Sts (3) Current 989 Process 49 pumps () Process 50 pipes and valves FLYGT pumps: Allow for replacement once in study period $5,000 each in the medium term Replace all pipes and valves once in the study period $0,000 medium term. Electrical 5 All the electrical, switches, PLC, wireless communic, milltronics, float switches etc to be replaced in the long term : $5,000 5 and SCADA 53 Allow for the upgrade of the SCADA system for all 3 sts: $30,000 in the long term Allow for the inspection of the wet well and clean out, including inspection of all ladders and other underground facilities twice in the study period $,000 short term and long term. Rebuild the st building in the long term $30,000 Adeliade 989 Process 54 pumps () Process 55 pipes and valves FLYGT pumps. Replace them once in study period $5,000 each - medium term. Replace all pipes and valves once in the study period $0,000 medium term. Electrical 56 All the electrical, switches, PLC, wireless communic, milltronics, float, etc to be replaced in the long term : $5, and SCADA 58 Allowance for upgrade is included in the section for Current Pumping St Allow for the inspection of the wet well and clean out, including inspection of all ladders and other underground facilities twice in the study period $,000 short term and long term. OCWA - Engineering Services Page 4/5

25 ( to 5) term: Montreal 989 Process 59 pumps () Process 60 pipes and valves Electrical 6 6 and SCADA 63 FLYGT pumps. Replace them once in study period $5,000 each - medium term. Replace all pipes and valves once in the study period $0,000 medium term. All the electrical, switches, PLC, wireless communic, milltronics, float, etc to be replaced in the long term : $5,000 Allowance for upgrade is included in the section for Current Pumping St Allow for the inspection of the wet well and clean out, including inspection of all ladders and other underground facilities twice in the study period $,000 short term and long term. $0 $0 $0 $0 $0 Contingency: 30% $0 $0 $0 $0 $0 Professional Services (@$50,000/yr) Grand Please note that these costs do not include: - Capital works related to increasing capacity at the existing facilities or the provision of new facilities to meet new future services requirements; - Normal opers costs (manpower, power, natural gas, chemicals, communic, vehicles, regular O&M, etc.); 3- Administr costs (billing, reporting,...). OCWA - Engineering Services Page 5/5