WESTSIDE WASTEWATER TREATMENT PLANT - DIFFUSER REPLACEMENT JOLIET CONTRACT NUMBER:

ADDENDUM NO. 3 FEBRUARY 24, 2017 WESTSIDE WASTEWATER TREATMENT PLANT - DIFFUSER REPLACEMENT JOLIET CONTRACT NUMBER: 2231-0417 FOR THE: CITY OF JOLIET, IL DATED: FEBRUARY 2017 PREPARED BY: CLARK DIETZ, INC. Note: This Addendum is hereby declared a part of the Contract Documents for the project designated above and in case of conflict, the following Addendum shall govern. Bidders shall state in their Bid Form that this Addendum has been received and is reflected in the Bid submitted. Bidder shall acknowledge receipt of this Addendum by replying to the email with the Addendum from the City. Bidder shall acknowledge this Addendum on the Bid Form and on the outside of the sealed opaque envelope containing the Bid. Bids received without acknowledgment of Addenda on the outside of the sealed envelope shall be returned to the Bidder unopened. GENERAL Item No 1. Item No 2. Flow conditions are required for the flow meters in the blower building per Addendum 2. During shop drawing review, alternate flanges, such as 150# standard slip on flanges, will be considered as a substitute for the flanges specified in Section 40 91 13 Part 2.2.D.2 if they meet material and pressure requirements. PROJECT MANUAL Item No 3. Item No 4. Section 40 91 13. Replace this Section with the new Section 40 91 13 included in Attachment 1. Section 40 05 13 Process Piping. Part 2.4 Add the following: E. Limit Rods 1. New limit rods shall be provided and installed at each axial expansion joint specified. a. 14 stainless steel piping 2 limit rods per joint b. 30 steel pipe 4 limit rods per joint 2. Stiffened brackets, threaded rods, and hardware shall match the pipe material. Paint steel materials to match pipe. 3. Rod shall be ½ diameter. Set limit rods such that allowable movement of expansion joints does not exceed ½. 4. Provide 3 minimum clearance between limit rod brackets and expansion joints. Page 1 of 11

5. Weld limit rod brackets to pipe. Item No 5. Section 40 05 13 Process Piping. Remove Part 2.5. Lateral Expansion Joints are not required. Page 2 of 11

SECTION 40 91 13 PROCESS MEASUREMENT DEVICES PART 1 GENERAL 1.1 SUMMARY A. The Contractor shall furnish process measurement devices, multi-parameter terminal /controllers, associated modules, and process control input/output modules as shown on the Drawings and specified herein. B. The Contractor shall install, calibrate, test, adjust, and place into satisfactory operation of the process measurement devices, multi-parameter terminal /controllers, and process control input/output modules as specified in this Section and as shown on the Drawings. C. The Drawings and Specifications are intended to illustrate and specify functional and general construction requirements of process measurement devices as specified herein and do not necessarily show or specify all components, wiring, piping, and accessories required to make a completely integrated system. 1. The Contractor shall provide all components, piping, wiring, accessories, and labor required for a complete operating and integrated system. D. The Contractor shall provide all items specified herein and required to ensure the complete and proper interfacing of all process monitoring and control network components and systems. E. Contractor shall connect the control signals to the Owner s existing DO control system and provide programming using the controls sub-contractor noted on the Bid Form to update the existing control system for the new equipment specified herein. 1.2 QUALITY ASSURANCE A. Equipment furnished under this section shall be from the manufacturer regularly engaged in the design and manufacture of such equipment with a minimum of five (5) years of experience with similar projects. 1. The manufacturers shall establish the standard of quality and performance of the equipment to be supplied. 2. The equipment manufacturer shall be ISO 9001 certified. B. Install, calibrate and test process measurement devices specified herein through qualified, skilled, certified technicians, regularly engaged in such activities involving systems of similar complexity. 1.3 SUBMITTALS A. Submit shop drawings, product data, and operation and maintenance data in accordance with Section 01 33 00. 1. Product literature, showing specifications, model number features, and options supplied clearly marked. 2. Manufacturer s installation details/drawings, electrical connection diagrams, calibration procedures, mounting bracket / sensor holder installation instructions. Page 3 of 11 40 91 13-1

3. List of cables, spare parts, and other appurtenances. 4. Mounting bracket installation instructions. B. Provide factory test reports for approval prior to shipment. C. Manufacturer s Certifications 1. Submit manufacturer s certification that equipment comply with specified requirements and are suitable for intended application. D. Operating and Maintenance Manuals shall include the following: 1. Manufacturer s operation and maintenance manuals for sensors, terminal/controller, process control input/output module, and associated modules. 2. Final reviewed submittals, including revised as-built submittal drawings. 3. Calibration forms completed with name of company responsible for calibration, location of calibration, range or set points, and date 4. Manufacturer s standard warranties. 1.4 PRODUCT DELIVERY, STORAGE, AND HANDLING A. Delivery and Acceptance Requirements: Deliver materials to site in manufacturer s original, unopened containers and packaging, with labels clearly identifying product name and manufacturer. B. Equipment shall not be delivered to the site until all product information and system shop drawings have been reviewed by the Engineer. C. Storage and Handling Requirements: 1. Store and handle materials in accordance with manufacturer s instructions. 2. Keep materials in manufacturer s original, unopened containers and packaging until installation. 3. Store materials in clean, dry area indoors. 4. Protect materials during storage, handling, and installation to prevent damage. 5. Temperature range for storage: 32 F to 149 F. PART 2 PRODUCTS 2.1 GENERAL A. Process measurement devices specified herein shall be designed for continuous monitoring. B. Connect sensors for the process measurement devices to field-mounted junction box or Input/Output modules and sensor connecting cable specified this section. C. The components for the process measurement devices shall be designed to be part of a process control system that is protected from overvoltage due to lightning and power supply fluctuations and covered by manufacturer s warranty when installed using manufacturer s recommended components per manufacturer s instructions. D. Provide the same manufacturer and model number series for all devices specified in this section. Page 4 of 11 40 91 13-2

E. Provide device with wetted materials recommended by the product manufacturer for best chemical compatibility with process fluid. 2.2 MANUFACTURER A. YSI Incorporated. Equipment Supplier is Gasvoda & Associates (E.J. Bukowski, 708-455-4624) B. No Substitutes. 2.3 DISSOLVED OXYGEN SENSOR A. General 1. Function: In situ continuous measurement of dissolved oxygen (DO) concentration in wastewater treatment systems. 2. Type: Optical sensors to measure lifetime of luminescence caused by the presence of oxygen. B. Performance Requirements 1. Operating range a. Temperature: 32 F to 140 F b. Pressure: less than or equal to 10 bar c. ph: 4 S.U. to 12 S.U. 2. Measuring range: 0.00 to 20.00 mg O 2/l; 0 to 200% of DO saturation 3. Accuracy a. ± 0.05 mg O 2/L in the range less than 1 mg O 2/L b. ± 0.10 mg O 2/L in the range greater than 1 mg O 2/L 4. Repeatability: ± 0.05 mg O 2/L 5. Resolution: 0.01 mg O 2 / L (0.1%) 6. Response time: 90% of the final (true) reading (t90) in less than 150 seconds and 95% of the final (true) reading in less than 200 seconds. 7. Signal averaging: User selectable, to provide a t90 from 150 seconds to 300 seconds. 8. Temperature measurement (compensation) range: 23 F to 140 F. C. Manufactured Unit: The Dissolved Oxygen measurement system consists of the following: 1. Model FDO 700 IQ Optical Dissolved Oxygen Sensor consisting of a probe and a replaceable sensor cap. a. The sensor shall have integrated NTC thermistor. b. The sensor shall use green LED light with fluorescing optics and equal path reference system. c. The sensor shall not require calibration. Replacement sensor caps shall contain a built in microchip, not requiring field calibration upon installation. d. The sensor shall include self-diagnostics for monitoring of membrane sensing element function. e. The sensor output signal shall be digital. f. The sensor shall detach from sensor cable allowing for easy replacement or repair. 2. SACIQ -15.0 sensor connection cable. a. 3-conductor shielded cable: communications, power, shield b. Conductors: Minimum 18 AWG c. Power supply: low voltage (24 V) d. Connections 1) Controller-side: Quick fastener (threaded) Page 5 of 11 40 91 13-3

2) Sensor-side: tinned conductors D. Materials 1. Sensor a. Shaft: V4A Stainless Steel 1.4571 (equivalent to 316Ti) b. Plug head connector housing: POM c. Sensor head: POM and PVC d. Plug: ETFE e. Fixing Ring: POM f. Protective hood: POM g. EMI/RFI conformance 1) EN 61326 Class B 2) FCC Class A h. Safety 1) Certification: CE, cetlus i. Protection rating: IP68 j. Warranty: 2 yrs. 2. Sensor Cap a. Sensor cap: PMMA, PVC, silicone b. Warranty: 2 yrs. 3. Sensor connection cable a. Conductors: Tinned copper b. Coupling ring: Stainless Steel 1.4571 (equivalent to 316Ti) c. Ring: POM 1) Screw: Stainless Steel V4A d. O-ring: NBR e. Enclosure: POM 1) Nut: Stainless Steel 1.4571 (equivalent to 316Ti) f. Protection ring: POM g. Cable sheath: PUR h. Protective cap: PVC i. Protection rating: IP68 (waterproof) j. Warranty: 12 months 2.4 MULTI-CHANNEL CONTROLLER A. Multi-parameter terminal/controllers and associated modules shall control, indicate, record, and transmit signals from multiple online sensors in wastewater treatment processes. B. Design Requirements 1. Design terminal/controller system for continuous operation outdoors. 2. Terminal/controllers shall stack-mount to any input/output module in the network specified in this section by means of a simultaneous mechanical/electrical connection. 3. Terminal/controller system components shall be designed to be part of a network that has the following capabilities and features: a. Protected from overvoltage due to lightning and power supply fluctuations and covered by manufacturer s warranty when installed using manufacturer s recommended components per manufacturer s instructions. b. Powered from a centralized power supply. c. 24VDC loop powered communication. Page 6 of 11 40 91 13-4

d. Modular: Additional sensors, up to a total of 20 sensors per controller, and process control input/output modules shall have full functionality from any location in the network. e. Line, tree, star, and multiple star topology. C. Performance Requirements 1. Operating range a. Temperature: -4 F to 131 F b. Relative humidity: less than or equal to 90% (yearly average) c. Altitude: less than or equal to 6,562 ft above mean sea level 2. Automatic air pressure compensation. D. Manufactured Unit: The multi-parameter controller consists of the following: 1. Model MIQ/TC 2020 XT 20-channel terminal/controller and Model MIQ/TC2020 XT as a back-up terminal/controller. a. Display 1) Black/white, backlit 2) Resolution: 320 x 420 pixels 3) Viewable area: 4.49 in. x 3.39 in. 4) Display of measured values: lists or daily, weekly or monthly xy chart b. Function/operation 1) 3 function keys 2) 2 confirmation/switching keys 3) 4-directional navigation key c. Datalogger 1) Total storage: Up to 525,600 measurements in csv format. 2) User programmable logging interval: 1 minute to 60 minutes. d. Multi-function USB-A port 1) Electronic key 2) Firmware upgrade 3) Data transfer e. Status light: blue LED f. Terminal controller shall use a menu-driven operating system. g. Each terminal/controller shall control 1 to 20 sensors. h. Terminal/controllers shall be portable within the network by connecting to any input/output module in the network by means of a simultaneous mechanical/electrical connection. 2. Model MIQ/MC2 Ethernet RJ45 module a. Inputs 1) 2 sensor connections b. Outputs 1) Ethernet RJ45 Connection c. Cable glands: M 16 x 1.5, 4 total, with screw plug d. Status lights: yellow LED, red LED 3. Model MIQ/PS power supply module a. Inputs 1) 3 x sensor connections 2) 1 x 100 to 240 VAC power b. Cable glands: M 16 x 1.5, 4 total, with screw plug c. Status lights: yellow LED, red LED 4. SNCIQ-500 network cable. Page 7 of 11 40 91 13-5

a. 3-conductor shielded cable: communications, power, shield b. Conductors: Minimum 18 AWG c. Power supply: low voltage (24 V) E. Materials 1. Terminal/controller. a. Housing material: ASA b. Function keys: silicon c. EMI/RFI conformance 1) EN 61326 Class B 2) FCC Class A d. Safety 1) Certification: CE, cetlus e. Protection rating: IP66 f. Interface 1) Silicon operating keys 2) LED status light g. 3-year warranty 2. Ethernet and Junction Box modules a. Housing material: polycarbonate, 20% glass filled b. EMI/RFI conformance 1) EN 61326 Class B 2) FCC Class A c. Safety 1) Certification: CE, cetlus d. Protection rating: IP66 e. 3-year warranty 3. SNCIQ network cable. a. Conductors: copper b. Cable sheath: PUR c. Protection rating: IP68 (waterproof) d. Warranty: 12 months 2.5 INPUT/ OUTPUT MODULES A. Input/output modules for process monitoring and control networks installed in wastewater treatment facilities. B. Design Requirements 1. Design process control input/output modules for continuous operation outdoors. 2. Design process control input/output modules to stack-mount directly to process control input/output modules and terminal/controllers specified in this section. 3. Process control input/output modules shall be designed to be part of a network that has the following capabilities and features: a. Protected from overvoltage due to lightning and power supply fluctuations and covered by manufacturer s warranty when installed using manufacturer s recommended components per manufacturer s instructions. b. Powered from a centralized power supply. c. Modular: Process control input/output modules shall have full functionality from any location in the network. d. Line, tree, star, and multiple star topology. Page 8 of 11 40 91 13-6

e. 24VDC loop powered communication. C. Performance Requirements 1. Operating range a. Temperature: -4 F to 131 F b. Relative humidity: less than or equal to 90% (yearly average) c. Altitude: less than or equal to 6,562 ft above mean sea level D. Manufactured Unit 1. Process control input/output modules consist of the following: a. Inputs 1) SensorNet connections a) Model MIQ/JB: 4 SensorNet connections. b) Model MIQ/PS: 3 SensorNet connections. c) Model MIQ/MC2: 2 SensorNet connections. 2) Power Supply a) Model MIQ/PS: 100.240VAC. 3) Current inputs a) Model MIQ/IC2: 2 current inputs b. Outputs 1) Network communications a) Model MIQ/MC2: Ethernet RJ45 interface. c. S/N terminator switch. d. Status lights: yellow LED, red LED. e. Cable glands: M 16 x 1.5, 4 total, with screw plug. E. Materials 1. Housing material: polycarbonate, 20% glass filled 2. EMI/RFI conformance a. EN 61326 Class B. b. FCC Class A. 3. Safety a. Certification: CE, cetlus 4. Protection rating a. Modules: IP66. b. USB, Ethernet interfaces: IP67 5. 3-year warranty 2.6 MOUNTING ASSEMBLY A. Each sensor shall be mounted as shown on the Drawings using a sensor-manufacturer supplied swing mounting assembly, which should include, at minimum: 1. Floor Mounting Stand for mounting to concrete base. a. YSI model 109 280Y 2. Swing Mounting Assembly. a. Stainless Steel boom: 1.5 m length. b. Stainless Steel chain:13-ft length. c. YSI model 109 272Y. 3. Single Sensor Holder. a. YSI model 109 320Y. 4. Sun shield for measuring transmitter. Page 9 of 11 40 91 13-7

a. YSI model 109 295Y. PART 3 EXECUTION 3.1 INSTALLATION A. General 1. Install the process measurement devices, terminal/controllers, and input/output modules, and process control input/output modules in strict accordance with the manufacturer s written instructions and recommendations. 2. Adjust settings on the process measurement devices in accordance with the manufacturer s written instructions to meet the application requirements. 3. Protect the probe against the oncoming flow of large objects. B. Sensor connection cable 1. Bend radius a. Permanent bend: not less than 3.2 inches. b. One-time bend: not less than 2 inches. 3.2 DISSOLVED OXYGEN SENSOR A. Immersion sensors 1. Immerse sensor a minimum of 18 inches below the surface. 2. Install where the optical window does not face into direct light. 3. Install instrument to prevent air bubbles from gathering on the membrane sensing element. 3.3 MANUFACTUER S FIELD SERVICES A. Gasvoda & Associates, Inc. shall provide services of factory trained, experienced representative for the following on-site tasks. 1. Installation assistance one-half day (1/2) day. 2. Equipment check out and startup one (1) day. 3. Training of Owner s personnel one-half (1/2) day. B. Each day shall consist of eight (8) hours at the project site excluding travel time and breaks and shall be provided in multiple trips. C. Training shall include installation, configuration, operation, trouble shooting, wiring, calibration, testing, and safety for each device. D. Furnish Installation Certificate from Gasvoda & Associates, Inc. attesting equipment has been properly installed and is ready for startup and testing. E. Copies of all information from functional tests, including data, worksheets, and other materials shall be turned over to the Owner at the completion of the testing program. 3.4 START-UP A. The purpose of the start-up is to demonstrate performance of all instruments to the Owner and Engineer. Page 10 of 11 40 91 13-8

B. Gasvoda & Associates, Inc. shall provide services of a factory-trained technician during start-up as specified in this section. 1. Gasvoda & Associates, Inc. must offer factory authorized field service for the equipment supplied as a standard function of their company. 2. Gasvoda & Associates, Inc. s in-house factory trained technician responsible for having started the system shall return for two (2) complete system inspection/calibration visits at the job site in six-month intervals beginning after successful start-up acceptance of system as part of the contract with no additional cost to the owner. C. Gasvoda & Associates, Inc. shall offer a continuing annual service inspection and calibration program for the Owner on completion of the final contract, if desired by the Owner. The cost shall be negotiated between the Owner and equipment supplier. D. The Contractor shall coordinate with the Owner, Engineer, and the Gasvoda & Associates, Inc. to schedule start-up. 1. The Contractor shall require representatives of the following be present during the start-up. a. General contractor b. Electrical contractor c. Manufacturer s factory-trained representative d. Owner s personnel e. Engineer E. Submit report to the Owner within ten (10) days of successful completion of the startup and commissioning. END OF SECTION Page 11 of 11 40 91 13-9