One(1) Pre-Owned Aerial Fire Apparatus as met by specifications.

Replacement of City Hall Roof

ULTRAVIOLET DISINFECTION EQUIPMENT 1.0 GENERAL 1.1 DESCRIPTION A. Scope: Furnish all labor, materials, equipment and appurtenances required to provide an open channel, gravity flow, low pressure high intensity ultraviolet lamp (UV) disinfection system complete with an automatic mechanical/chemical cleaning system and variable output electronic ballasts. Systems without mechanical/chemical cleaning will NOT be accepted. The UV system to be complete and operational with all control equipment and accessories as shown and specified herein. This system will be capable of disinfecting effluent to meet the water quality standards listed in this section. This system must be a direct replacement/upgrade to the existing Trojan Technologies system installed at the Derider Wastewater Plant. The system to be installed by the Contractor and tested and commissioned by Trojan Technologies, as specified in this section. The Owner will consider alternates if all requirements of this specification are met without exception including Pre-qualification Requirements in section 1.2 Quality Assurance. B. Related Work Specified Elsewhere: 1. Section : Anchor Bolts, Expansion Anchors and Concrete Inserts 2. Section : Electrical 3. Section : Sluice Gates 1.2 QUALITY ASSURANCE A. Pre-qualification Requirements: Any alternate UV manufacturer that is not named or listed as approved equal must submit, thru a bidding contractor, 15 days prior to bid to be considered for approval: 1. To be considered, the manufacturer will be regularly engaged in the manufacture of UV systems with a proven track record of at least two hundred (200) operating installations of the proposed UV system and have a Louisiana based certified technician with manufacturer’s certificate of accreditation. 2. The manufacturer will provide documentation of previous experience with municipal UV disinfection systems in wastewater applications in Louisiana with variable output electronic ballasts. 3. Pre-qualification submittals from manufacturers will include a complete and detailed proposal of equipment offered, including the number of lamps proposed and a detailed description of any exceptions taken to the specification. 4. To be considered, the manufacturer will submit a bioassay evaluation for the proposed reactor, without exception. The bioassay will have been completed by an independent third party and have followed protocols described in the NWRI Ultraviolet Disinfection Guidelines for Drinking Water and Water Reuse (May 2003) using MS2 bacteriophage as the surrogate test organism. The bioassay must demonstrate that the proposed UV system design and number of lamps will deliver the specified dose. 5. Independent certification of fouling factor and lamp aging factor must be submitted if values other than the specified default values are being proposed. 6. Documentation of UV manufacturer's service capabilities including location and experience. 7. Sample disinfection performance guarantee including scope and duration of guarantee. 8. All UV manufacturers will be required to pre-qualify, unless the manufacturer is the base bid manufacturer. B. Design Criteria: 1. Provide equipment that will disinfect effluent with the following characteristics: a) Current Peak Flow: 5.3 MGD b) Future Peak Flow: 5.3 MGD c) Total Suspended Solids: 30 mg/L, 30 Day Average of grab samples d) Effluent Temperature Range: 33 to 85 F (1 to 30 °C) e) Ultraviolet Transmittance @ 253.7 nm: 65 %, minimum f) Maximum Mean Particle Size: 30 microns g) Effluent standards to be achieved: 200 fecal coliform/100 ml based on a 30 day Geometric Mean of daily samples for the effluent standard as specified in a) through f). Effluent standards will be guaranteed regardless of influent count to UV system. 2. The UV system is to be installed in 1 open channel having the following dimensions: a) Length: 30 ft b) Width: 16 in c) Depth: 54 in 3. The effluent depth in the channel will be 24 in. 4. System configuration: a) The UV system must fit within the UV channel as stated without modification. b) The UV system configuration will be as follows: • Number of Channels: 1 • Number of Banks per Channel: 2 • Number of UV Modules per Bank: 4 • Number of Lamps per UV Module: 6 • Total Number of Lamps in the UV System: 48 • Number of System Controllers: 1 • Number of UV Detection Systems: 2 • Number of Power Distribution Centers: 2 • Number of Level Controllers: 1 C. Performance Requirements: 1. The ultraviolet disinfection system will produce an effluent conforming to the following discharge permit: 200 fecal coliform/100 ml, based on a 30 day Geometric Mean. Grab samples will be taken in accordance with the Microbiology Sampling Techniques found in Standard Methods for the Examination of Water and Wastewater, 19th Ed. 2. Provide a UV disinfection system complete with UV Banks, System Control Center, Power Distribution Centers, Support Racks and Level Controller as shown on the contract drawings and as herein specified. 3. The UV system will be designed to deliver a minimum UV dose of 30,000 Ws/cm2 at peak flow, in effluent with a UV Transmission of 65% at end of lamp life (EOLL) after reductions for quartz sleeve fouling. The basis for evaluating the UV dose delivered by the UV system will be the independent third party bioassay, without exception. Bioassay validation methodology to follow protocols described in NWRI Ultraviolet Disinfection Guidelines for Drinking Water and Water Reuse (May 2003) using MS2 bacteriophage as the surrogate test organism. 4. The UV Dose will be adjusted using an end of lamp life factor of 0.5 to compensate for lamp output reduction over the time period corresponding to the manufacturer’s lamp warranty. The use of a higher lamp aging factor will be considered only upon review and approval of independent third party verified data that has been collected and analysed in accordance with protocols described in NWRI Ultraviolet Disinfection Guidelines for Drinking Water and Water Reuse (May 2003). 5. The UV Dose will be adjusted using a quartz sleeve fouling factor of 0.8 when sizing the UV system in order to compensate for attenuation of the minimum dose due to sleeve fouling during operation. The use of a higher quartz sleeve fouling factor will be considered only upon review and approval of independently verified data that has been collected and analysed in accordance with protocols described in NWRI Ultraviolet Disinfection Guidelines for Drinking Water and Water Reuse (May 2003). 6. Independent Validation for use of higher factors (lamp aging and sleeve fouling) must be submitted to the Engineer a minimum of fifteen (15) days prior to bid. 7. The system will be able to continue providing disinfection while replacing UV lamps, quartz sleeves, ballasts and while cleaning the UV lamp sleeves. 8. The system will be designed for complete outdoor installation. 1.3 SUBMITTALS A. Submit for review, shop drawings showing the following: 1. Complete description in sufficient detail to permit an item comparison with the specification. 2. Dimensions and installation requirements. 3. Descriptive information including catalogue cuts and manufacturers' specifications for major components. 4. Electrical schematics and layouts. 5. Hydraulic calculations demonstrating compliance with the required hydraulic characteristics. 6. Independent bioassay validation and dosage calculations demonstrating compliance with the specified dose requirements. 7. Disinfection performance guarantee. 1.4 GUARANTEE A. Equipment: The equipment furnished under this section will be free of defects in material and workmanship, including damages that may be incurred during shipping for a period of 12 months from date of start-up or 18 months after shipment, whichever comes first. B. UV Lamps: The UV lamps to be warranted for a minimum of 12,000 hours when operated in automatic mode, prorated after 9,000 hours. On/off cycles are limited to four (4) per day. C. Ballasts to be warranted for 5 years, prorated after 1 year. 2.0 PRODUCTS 2.1 MANUFACTURER A. The physical layout of the system shown on the contract drawings and the equipment specified herein are based upon the UV3000PlusTM System, as manufactured by Trojan Technologies, London, Ontario, Canada. B. If other equipment is proposed, the Contractor will demonstrate to the Engineer and the Owner that all requirements of materials, performance, and workmanship have been met or exceeded by the equipment proposed. Contractors proposing alternate manufacturers will be responsible for all costs associated with system evaluation and redesign including all electrical, mechanical and civil aspects of the installation. C. Only manufacturers with factory-trained, certified technicians located within 200 miles of the UV system will be accepted. 2.2 DESIGN, CONSTRUCTION AND MATERIALS A. General: 1. All module welded metal components in contact with effluent will be Type 316 stainless steel. 2. All metal components above the effluent will be Type 304 stainless steel with the exception of the ballast enclosure, which is constructed of anodised aluminium. 3. All wiring exposed to UV light will be TeflonTM coated. 4. All wires connecting the lamps to the ballasts will be enclosed inside the frame of the UV Module and not exposed to the effluent. To be considered as an alternate, wires that are exposed to the effluent will be warranted for 15 years and will be TeflonTM coated to prevent degradation under constant exposure to UV light. B. Lamp Array Configuration: 1. The lamp array configuration will be the uniform array with all lamps parallel to each other and to the flow. 2. The system will be designed for complete immersion of the UV lamps including both electrodes and the full length of the lamp tube in the effluent. C. UV Module: 1. Each UV module will consist of UV lamps with an electronic ballast enclosure mounted on a Type 316 stainless steel frame. To be considered as an alternate, ballasts housed in a separate enclosure located external to the channel will be equipped with a suitable air conditioning system, supplied by the UV manufacturer, to maintain internal enclosure temperatures below 80F (26°C). No forced air ventilation will be allowed. 2. Each lamp will be enclosed in its individual quartz sleeve, one end of which will be closed and the other end sealed by a lamp end seal. To be considered as an alternate, lamp quartz sleeves that are open at both ends will be supplied with twice the amount of specified spare seals and lamps. 3. The closed end of the quartz sleeve will be held in place by means of a retaining O-ring. The quartz sleeve will not come in contact with any steel in the frame. 4. The ends of the lamp sleeve will not protrude beyond the stainless steel frame of the UV Module. 5. Lamp wires will terminate in the electronic ballast enclosure located at the top of the UV Module. 6. All lamp to ballast connections will be made by and tested by the UV Manufacturer. 7. The electronic ballast enclosure will contain the electronic ballasts and addressable lamp status monitoring systems. 8. Each UV Module will be connected to a receptacle on the Power Distribution Center. 9. At the point of exit from the UV Module frame the multi conductor cable will pass through a waterproof strain relief. 10. Each UV module will have a rating of Type 6P. D. UV Lamps: 1. Lamps will be high intensity low pressure amalgam design. The lamp will be preheated to promote longevity. Lamps that are not amalgam or that are based on driving a low pressure lamp at amperages greater than 500 milliamps will not be allowed. 2. The filament will be of the clamped design, significantly rugged to withstand shock and vibration. 3. Electrical connections will be at one end of the lamp and have four pins, dielectrically tested for 2,000 Vrms. Lamps that do not have 4 pins will be considered instant start. To be considered as an alternate, instant start lamp systems will supply replacement spare lamps equal to 50% of the total number of lamps in the system. 4. Lamps will be operated by electronic ballasts with variable output settings. E. Lamp End Seal and Lamp Holder: 1. The open end of the lamp sleeve will be sealed by means of a sleeve nut which threads onto a sleeve cup and compresses the sleeve O-ring. 2. The sleeve nut will have a knurled surface to allow a handgrip for tightening. The sleeve nut will not require any tools for removal. 3. The lamp will be held in place by means of a moulded lamp holder that will incorporate two seals. The lamp holder will incorporate a double seal against the inside of the quartz sleeve to act in series with the external O-ring seal. 4. The second seal on the lamp holder will isolate and seal the lamp from the module frame and all other lamps in the module. 5. In the event of a quartz sleeve fracture the two seals of the lamp holder will prevent moisture from entering the lamp module frame and the electrical connections to the other lamps in the module. 6. The lamp holder will also incorporate a UV resistant PVC moulded stop that will prevent the lamp sleeve from touching the steel sleeve cup. F. UV Lamp Quartz Sleeves: 1. Type 214 clear fused quartz circular tubing as manufactured by General Electric or equal. 2. Lamp sleeves will be domed at one end. 3. The nominal wall thickness will be 1.5 mm. G. UV Module Support Rack: 1. The UV module support rack will be minimum Type 304 stainless steel and be mounted above the effluent in the channel allowing adjustment to the precise height of the channel. H. Effluent Level Controller: 1. Automatic Level Controller a) Located at the discharge end of the UV channel. b) Designed to maintain a minimum effluent level, within minimal variations as required to keep lamps submerged. c) Constructed of Type 304 stainless steel, and other non-corroding materials. Counterweights to be constructed of galvanized mild steel. I. Low Water Level Sensor: 1. One low water level sensor will be provided by the UV Manufacturer for each UV channel. 2. During manual, automatic and remote modes of system operation, the water level sensor will ensure that lamps extinguish automatically if the water level in the channel drops below an acceptable level. 3. The low water level sensor will be powered by the Power Distribution Center. J. Electrical: 1. Each UV module within a bank will be powered from the bank’s dedicated Power Distribution Center. 2. UV manufacturer to supply all cabling and conduit between lamps and ballasts. 3. UV manufacturer to perform all terminations between lamps and ballasts. 4. Each electronic ballast within a UV module will operate two lamps. 5. Power factor will not be less than 98% leading or lagging. 6. Electrical supply to each Power Distribution Center will be 208 Volts, 3 phase, 4 wire (plus ground), 8.6 kVA. 7. Electrical supply to the Hydraulic System Center will be powered by one of the Power Distribution Center. 8. Electrical supply for the water level sensor will be provided by the PDC and be 12 Volt DC. 9. Electrical supply to the System Control Center will be 120 Volts, 1 phase, 2 wire (plus ground), 1800 VA. K. Power Distribution Center: 1. Power distribution will be through environmentally sealed receptacles on the PDCs to allow for local connection of UV modules. 2. Data concentration will be through integrated circuit boards located inside the Power Distribution Center. 3. PDC enclosure material will be Type 304 stainless steel. 4. All internal components will be sealed from the environment. 5. All Power Distribution Centers to be UL approved or equivalent with a rating of Type 4X. 6. One separate sealed Power Distribution Center will be provided per bank of lamps. To be considered as an alternative, systems that have ballasts mounted in cabinets, the UV manufacturer will provide one complete cabinet for each bank of lamps, to ensure that each bank is electrically isolated for safety during maintenance and to provide redundancy under average flow conditions. L. Control and Instrumentation: 1. System Control Center (SCC): a) The operation of the UV3000PlusTM is managed at the SCC by a PLC based controller which continuously monitors and controls the system functions. PLC will be “Compact Logix” as manufactured by Allen Bradley. b) The operator interface display screen will be menu driven with automatic fault message windows appearing upon alarm conditions. PLC Operator Interface will be “Panelview 700” as manufactured by Allen Bradley. c) Alarms will be provided to indicate to plant operators that maintenance attention is required or to indicate an extreme alarm condition in which the disinfection performance may be jeopardized. The alarms will include but not be limited to: i) Lamp Failure ii) Multiple Lamp Failure iii) Low UV Intensity iv) Module Communication Alarm d) The 100 most recent alarms will be recorded in an alarm history register and displayed when prompted. e) Bank status will be capable of being placed either in Manual, Off or Auto mode. f) Elapsed time of each bank will be recorded and displayed on the display screen when prompted. g) Optional: Digital I/O modules will be provided to remotely indicate status and alarms such as: i) Alarm conditions (major, critical) ii) Bank Status (one for each UV bank supplied) M. UV Detection System: 1. A submersible UV sensor will continuously monitor the UV intensity produced in each bank of UV lamps. 2. The sensor will measure only the germicidal portion of the light emitted by the UV lamps. The detection system will be factory calibrated. Detection systems that can be field calibrated will not be permitted. N. Dose-Pacing: 1. A dose-pacing system will be supplied to modulate the lamp UV output in relationship to a 4-20 mA DC signal from an effluent flow meter (by Others). 2. The system to be dose-paced such that as the flow and effluent quality change, the design UV dose is delivered while conserving power. 3. The dose-pacing system will allow the operator to vary the design dose setting. Logic and time delays will be provided to regulate UV bank ON/OFF cycling. O. Hydraulic System Center (HSC): 1. One (1) HSC will be supplied to house all components required to operate the automatic cleaning system. 2. Enclosure material of construction will be Type 304 stainless steel. 3. The HSC will contain a hydraulic pump complete with integral 4-way valve and fluid. P. Cleaning System: 1. An automatic cleaning system will be provided to clean the quartz sleeves using both mechanical and chemical methods. Wiping sequence will be automatically initiated with capability for manual override. 2. The cleaning system will be fully operational while UV lamps and modules are submerged in the effluent channel and energized. 3. Cleaning cycle intervals to be field adjustable. 4. Remote Manual and Remote Auto cleaning control options will be provided. 5. The cleaning system will be provided with the required solutions necessary for initial equipment testing and for equipment start-up. To be considered as alternate, systems that use only mechanical wiping or no cleaning system must have the ability to periodically be cleaned out of channel using a chemical bath. Out of channel cleaning will include lifting slings, removable banks, cleaning tanks, and agitation system and air compressors, as required. The UV manufacturer will be responsible for supplying all equipment including any equipment not specifically listed required to perform out of channel chemical cleaning. Contactor will be responsible for installation. Systems in which effluent flows through PTFE tubes must include a fully redundant channel at Peak Design Flow to ensure that one channel can be taken offline and drained to facilitate manual cleaning of the tubes while the other channel is in service. Q. Module Lifting Device: 1. One Davit crane, base and lifting sling will be supplied to assist in removing individual modules from the effluent channel. 2. Lifting device will be a crane with hand winch and will include an adjustable boom to ensure adequate reach and height. 3. Lifting device to include a swivel handle for rotation and positioning. 4. Crane and base will be supplied by the Manufacturer and will be installed by the Contractor. R. Spare Parts: The following spare parts and safety equipment to be supplied. 1. 8 UV Lamps 2. 8 Quartz Sleeves 3. 8 Lamp Holder Seals 4. 1 Operators kit including face shield, gloves and cleaning solution. To be considered as an alternate, systems that require more lamps than specified, the UV manufacturer will provide spares in the amount equal to the quantities listed plus an additional quantity equal to the percentage of lamps required over and above the number of lamps specified. 3.0 EXECUTION 3.1 INSTALLATION In accordance with contract drawings, manufacturers' shop drawings and instructions. 3.2 MANUFACTURER'S SERVICES A. Installation assistance and certification: As required for proper installation prior to start up. B. Start-up and field testing: 3 full days on site, including all travel expenses. C. Operator Training: 1 full day on site. D. Warranty Service: As required during the warranty period.

West Park Swimming Pool Renovation

DeRidder 2011/2012 Overlay and 8th Street Improvements