Date SECTION MEASUREMENT AND CONTROL INSTRUMENTATION Project Name Page 1

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1 Project Name Page 1 PART 1 GENERAL 1.1 A. The Hach RTC-N/DN Real Time Controller is a factory tested, standardized optimization solution with over 750 installations. The system uses a proprietary pre-written control logic running on a dedicated processor to output a signal. The system can be operated in open or closed-loop configurations and uses inputs from the Hach AMTAX sc online ammonium analyzer, Hach ANISE sc ammonium nitrate and nitrate analyzer, Hach NITRATAX sc nitrate analyzer, Hach LDO2 dissolved oxygen probe, plant flow, and temperature with preprogrammed algorithms are used to calculate the optimum DO concentration to maintain the desired ammonium levels. The output signal is a 0-20 ma or 4-20 ma current loop signal. B. The system integrates Prognosys, Hach s proprietary predictive diagnostic software to show operators real-time system performance and indicate service needs. If a sensor fails the system automatically falls back to pre-configured static dose and notifies operators. C. End users are provided with a pre-written O&M manual and a dedicated project management resource to coordinate system installation. Customers are granted priority access to our dedicated technical support resources. In the event of a system alarm, the support team is notified via text and . System data is uploaded in five minute intervals and can be analyzed by system experts in Loveland, Colorado to provide customized optimization recommendations. If onsite repair is required, a local field service technician will be dispatched to the customer site Section includes: A. Hach RTC105 Nitrification/Denitrification-Module, an Industrial PC (IPC) that uses NH4-N influent concentration, nitrate, flow rate, mixed liquor suspended solids, dissolved oxygen and temperature and a preprogrammed algorithm to calculate the exact DO required for the aeration system to reach the desired discharge values. B. Hach ANISE sc Sensor, an analyzer continuous monitoring of ammonium nitrogen and nitrate nitrogen in one probe in wastewater treatment, with predictive diagnostics capability to monitor instrument status. C. Hach Filtrax Sample Filtration System, for sample filtration consisting of: 1. Filter module holder 2. Control unit 3. Sample delivery hose D. Hach NITRATAX sc Sensor, for continuously monitoring nitrate in water, with predictive diagnostics capability to monitor instrument status E. Luminescent Dissolved Oxygen (LDO, Model 2) sensor for continuous measurement of dissolved oxygen (DO) in aqueous solutions, with predictive diagnostics capability to monitor instrument status. F. Hach sc1000 Digital Controller, a multi-parameter that works with digital sensors, with optional predictive diagnostics capability to monitor instrument status. 1.4 Measurement Procedures A. RTC105 NDN-Module 1. The module operates when connected to the sc1000 controller. 2. The module can be used for both open- and closed-loop control of precipitant dosing. 3. Input from the AMTAX sc analyzer, Nitratax sc probe, NH4-N probe, LDO2 probe, and a flow meter, in conjunction with preprogrammed algorithms, are used to calculate the optimum DO concentration to maintain the desired discharge levels. 4. The module produces a signal to control the DO blowers for optimum control. B. ANISE sc Sensor

2 Project Name Page 2 1. The method of measuring ammonium nitrogen and nitrate nitrogen is by ion-selective electrodes (ISE). a. A differential ph electrode is used as the reference. b. A potassium ISE is used to correct the ammonium value for the presence of potassium ion. c. A chloride ISE is used to correct the nitrate value for the presence of chloride ion. C. AMTAX sc 1. The method of measuring ammonium will be by gas sensitive electrode (GSE) that uses liquid to gas- phase conversion. a. Sample is mixed with sodium hydroxide that converts all ammonium to ammonia which is expelled from the sample. b. Ammonia gas is re-dissolved in an indicator reagent, changing the ph value to produce a color change. c. A colorimeter measures the color change of the solution and the reading is converted to ammonia concentration. D. Filtrax sc 1. The filter module holder shall be immersed at the sampling point. 2. The module holder shall contain two filters that are each spanned by a 0.15 μm membrane. 3. An air-purge system underneath the two immersed filter modules shall provide a continuous air supply to automatically clean the filter elements by preventing adhesion of solids to the filter membranes. 4. The sample shall be drawn through the immersed membranes via two tube-metering pumps which are housed within the control unit. 5. Operating with no wetted parts, the metering pumps shall draw the sample alternately from the two filter modules into the control unit via a 5-m (15-ft.) heated suction hose. 6. The sample shall be pumped up to 30-m (90-ft.) from the control unit to the process-measuring unit. E. NITRATAX sc Sensor 1. The method of measuring nitrate will be ultraviolet (UV) light absorption at 210 nm. a. A reference beam at 350 nm will provide a reference standard to correct for interference by turbidity and organic matter. F. LDO, Model 2 sc 1. The method of measuring dissolved oxygen will be a probe using luminescent sensor technology. a. Blue LED light excites platinum based luminescent material in the probe. Red light is emitted by luminescent material with characteristics that are directly proportional to the amount of dissolved oxygen present. The red light is measured with a photo detector. b. Red LED light is used to zero the instrument between measuring cycles. G. sc1000 Digital Controller 1. Change sensors connected to the controller by unplugging and plugging sensors as necessary. 2. The controller accepts up to eight sensor inputs from digital sensors. 1.5 Alternates A. Other sensors that do not use a differential ph reference electrode are not acceptable. B. Other sensors that do not use both potassium ISE to correct the ammonium value and chloride ISE to correct the nitrate value are not acceptable. C. Other instruments that do not use a GSE are not acceptable. D. Other methods of nitrate measurement, such as colorimetric, amperometric, potentiometric, and iodometric with electrodes, or those that require reagents are not acceptable. E. Other methods of dissolved oxygen measurement such as galvanic, poloragraphic, or luminescent measurements using Ruthenium are not acceptable. F. Instruments that do not have predictive diagnostic capabilities are unacceptable

3 Project Name Page 3 G. Other controllers that do not have the option for predictive diagnostic capabilities on connected instruments are unacceptable. 1.6 System Description A. RTC105 NDN-Module Performance Requirements: 1. Analog input/output signal current: 4-20 ma for flow rate measurement and dosing pump 2. Power supply is 24 VDC 3. Measurement error is ± 0.1% 4. Analog output conversion time is ~ 1.5 ms B. ANISE sc Sensor Performance Requirements 1. Measurement range ammonium: 0.2 to 1000 mg/l NH4-N 2. Measurement range nitrate: 0.2 to 1000 mg/l NO3-N 3. Accuracy: 5% of measured value ±0.2 mg/l (with standard solution) 4. Detection limit: 0.2 mg/l 5. Response time: less than 3 minutes (T90) 6. When connected to a multi-parameter digital control the overall status of the instrument performance is displayed as a percentage value via a measurement indicator 7. When connected to a multi-parameter digital control the overall time remaining until maintenance tasks are due is displayed in days C. AMTAX sc Performance Requirements 1. When connected to a multi-parameter digital control the overall status of the instrument performance is displayed as a percentage value via a measurement indicator 2. When connected to a multi-parameter digital control the overall time remaining until maintenance tasks are due is displayed in days 3. Measurement range (depending on model): a to 20 mg/l, or b. 1 to 100 mg/l, or c. 10 to 1000 mg/l 4. Lower detection limit (depending on model): a mg/l, or b. 1 mg/l, or c. 10 mg/l 5. Accuracy (depending on model): a. 3% ±0.05 mg/l, or b. 3% ±1.0 mg/l, or c. 4.5% ±10 mg/l 6. Reproducibility (depending on model): a. 2% ±0.05 mg/l, or b. 2% ±1.0 mg/l, or c. 2% ±10 mg/l 7. Response time: Less than 5 minutes (T90), including sample preparation 8. Measurement interval: 5 to 120 minutes, adjustable D. Filtrax sc Performance Requirements 1. The sample extraction and filtration system shall consist of three components: filter module holder, control unit, and sample delivery hose. 2. The control unit must be an IP55 rated, heated enclosure, designed for outdoor installation. 3. The system shall deliver a sample at a rate of up to 900 ml/h for up to three process instruments. 4. The sample filtration system shall provide two programmable, potential free contacts (115 or 230 VAC, max. 3A) to monitor the flow rate across the filter media. E. NITRATAX sc Sensor Performance Requirements

4 Project Name Page 4 1. Performance Requirements a. Measurement range (depending on model): 0.1 to 100 mg/l for nitrate (NOX-N) b. Accuracy (depending on model): ± 5 percent of mean ± 1.0 or better c. Resolution (depending on model): 0.1 or 0.5 mg/l d. Detection limit (depending on model): 0.1 to 100 mg/l e. When connected to a multi-parameter digital control the overall status of the instrument performance is displayed as a percentage value via a measurement indicator f. When connected to a multi-parameter digital control the overall time remaining until maintenance tasks are due is displayed in days F. LDO, Model 2 sc Performance Requirements 1. Measurement range: 0.01 to mg/l 2. Resolution: 0.01 mg/l 3. Accuracy a. Less than 5 ppm: ± 0.1 ppm b. Greater than 5 ppm: ± 0.2 ppm 4. Repeatability: ± 0.1 ppm 5. Response Time: a. Less than 40 seconds to 90% at 20 C b. Less than 60 seconds to 95% at 20 C 6. Temperature sensor: PT100 integrated, external sensor 7. Temperature range: 0 to 50 C 8. Temperature accuracy: ± 0.2 C 9. When connected to a multi-parameter digital control the overall status of the instrument performance is displayed as a percentage value via a measurement indicator 10. When connected to a multi-parameter digital control the overall time remaining until maintenance tasks are due is displayed in days G. sc1000 Digital Controller Performance Requirements 1. Communication and relay options for the sc1000 controller can be configured to suit any situation. Available configurations for a single Probe Module include: a. Up to 4 relay contacts for alarm and control functions b. Up to 12 analog outputs for measured values c. Up to 12 analog or digital inputs from non-digital sensors (i.e., flow or pressure sensors) d. Up to 8 digital inputs from digital sensors 2. When paired with an enabled sensor, the overall status of the sensor performance is displayed as a percentage value via a measurement indicator 3. When paired with an enabled sensor, the overall time remaining until maintenance tasks are due for the sensor is displayed in days 1.7 Certifications A. RTC105 NDN-Module 1. Conforms to EN /EN /29 2. Conforms to EN /EN B. ANISE sc Sensor 1. CE approved C. AMTAX sc 1. CE conform. 2. Listed to UL and CSA safety standards by TUV D. Filtrax sc 1. TUV to UL and CSA C22.2 No

5 Project Name Page 5 2. TUV to EN CE per 73/23/EEC and 93/68/EEC 4. Conforms to EN 61326:1997 / A1:1998 E. NITRATAX sc Sensor 1. Not applicable F. LDO, Model 2 sc 1. General Purpose CSA/CSA NRTL and FM (UL Pending) when used with an approved controller. 2. Class 1, Div 2 Groups A thru D CSA/CSA NTRL and FM (UL Pending) when used with an approved controller. G. sc1000 Digital Controller 1. ctuvus to UL 61010A-1 and CSA C22.2 No TUV-GS to EN CE per 73/23/EEC and 89/336/EEC 1.8 Environmental Requirements A. RTC105 NDN-Module 1. Working temperature: 0 to 50 C (32 to 122 F) 2. Storage temperature: 25 to +85 C ( 13 to 185 F) 3. Operating humidity: 95% relative humidity, non-condensing B. ANISE sc Sensor 1. Operating temperature -20 to 45 C (-4 to 114 F) 2. Sample temperature: 2 to 40 C (35 to 104 F) 3. Sample ph: 5 to 9 4. Sensor immersion depth: 0.3 to 3.0 meters (1 to 10 feet) maximum 5. Sample pressure: 0.3 bar (4.4 psi) maximum C. AMTAX sc 1. Sample temperature: 4 to 40 C (39 to 104 F) 2. Sample ph: 5 to 9 ph 3. Operating temperature: -20 to 45 C (-4 to 114 F) 4. Operating humidity: 95% relative humidity, non-condensing D. Filtrax sc 1. Immersion depth: 9.8 feet (3 m), maximum 2. Sample flow rate: 900 ml/h 3. Filtrate flow rate: 5 ml/min, minimum E. NITRATAX sc Sensor 1. Operating temperature: 0 to 40 degrees C (36 to 104 degrees F) 2. Operating pressure: 0.5 bar (7.2 psi) maximum F. LDO, Model 2 sc 1. Operating temperature: 0 to 50 C 2. Relative humidity: 95%, non condensing 3. Immersion depth: 15 meters (50 ft.), maximum 4. Immersion pressure: 345 kpa, maximum 5. Sample ph range: 0.0 to Distance, analyzer to sensor: 1000 meters, maximum G. sc1000 Digital Controller 1. Operating temperature: -4 to F (-20 to 55 C) 2. Storage temperature: -20 to 70 C (-4 to 158 F)

6 Project Name Page Warranty A. The AMTAX, FILTRAX, NITRATAX, sc1000 Digital Controller and the RTC103 N-Module include a one-year warranty from date of shipment. B. LDO, Model 2 sc 1. The probe body is warranted for 3 years from date of purchase 2. The sensor cap is warranted for 2 year from date of purchase 1.10 Maintenance Service A. RTC105 NDN-Module Scheduled Maintenance 1. Replace CF card every 2 years 2. Replace battery every 5 years B. ANISE sc Sensor Scheduled Maintenance 1. Monthly: visual inspection, if necessary, clean with brush and clear water 2. Bi-annually: replace calibrated sensor cartridge C. AMTAX sc Scheduled Maintenance 1. Replace stirrer arm: yearly 2. Replace valve pumps: yearly 3. Replace cylinder and piston: yearly D. AMTAX sc Unscheduled maintenance 1. Replace chemicals as required 2. Replace filter element, fan housing, filter element, and compressor as required E. Filtrax sc Scheduled Maintenance 1. Continuous self-cleaning F. NITRATAX sc Sensor Scheduled Maintenance 1. Check condition of wiper blades: monthly 2. Change wiper blades: after approximately 20,000 cycles 3. Replace sensor seals: yearly G. NITRATAX sc Sensor Unscheduled Maintenance 1. Replace UV lamp H. LDO, Model 2 sc Scheduled Maintenance 1. Sensor cleaning: 90 days or depending on conditions 2. Sensor and sensor cap inspection: 90 days 3. Sensor cap replacement: once every 2 years 4. Calibration: per regulatory agency schedule, otherwise calibration-free I. LDO, Model 2 sc Unscheduled Maintenance 1. Replace fuse 2. Clean instrument enclosure J. sc1000 Digital Controller Scheduled Maintenance 1. Clean controller keypad

7 Project Name Page 7 PART 2 PRODUCTS 2.1 Manufacturer A. RTC105 NDN-Module 1. Hach Company, Loveland, CO B. ANISE sc Sensor 1. Hach Company, Loveland, CO C. AMTAX sc Ammonium Analyzer 1. Hach Company, Loveland, CO D. Filtrax Sample Filtration System 1. Hach Company, Loveland, CO E. NITRATAX plus sc 1. Hach Company, Loveland, CO F. sc1000 Digital Controller 1. Hach Company, Loveland, CO 2.2 Manufactured Unit A. RTC105 NDN-Module consists of 1. Rail mounted PLC 2. Input and output connections B. ANISE sc Sensor consists of 1. The AN-ISE sc Ammonium and Nitrate Combination Sensor consists of a digital sensor with integrated, replaceable sensor cartridge. 2. The integrated sensor cartridge includes ammonium ISE, nitrate ISE, differential ph electrode, potassium ISE, chloride ISE, and temperature sensor. C. AMTAX sc Ammonium Analyzer consists of 1. Housing: ASA UV-resistant, IP55-rated, lockable 2. Gas sensitive electrode 3. Colorimeter D. Filtrax sc consists of 1. Filter module holder 2. Control unit 3. Sample delivery hose E. NITRATAX sc Sensor consists of 1. The NITRAX UV Nitrate Sensor consists of an immersible stainless steel probe with 10-meter cable. F. LDO, Model 2 sc 1. The Hach LDO system consists of submersible probe with stainless steel body, CPVC ends, replaceable sensor cap, and integral cable. G. sc1000 Digital Controller consists of 1. A microprocessor housed in an enclosure, rated IP65 2. The sc1000 controller is a modular system consisting of: a. Display module b. Probe module c. Connections for Hach digital sensors 2.3 Equipment A. RTC105 NDN-Module 1. Processor: Pentium 1, MMX compatible, 500 MHz clock rate 2. Flash memory: 2 GB compact flash card

8 Project Name Page 8 3. Internal working memory: 256 MB DDR-RAM 4. Interface: RJ 45 (Ethernet), 10/100 MBit/s 5. Diagnostic LEDs: Power, LAN speed, LAN activity, TC status, flash access 6. Expansion slot: Compact flash type II slot with ejection mechanism 7. Internal clock: Battery-buffered clock for time and date (battery can be replaced) 8. Operating system: Microsoft Windows 2 CE or Microsoft Windows Embedded Standard 9. Control software: TwinCAT PLC Runtime or TwinCAT NC PTP Runtime 10. System bus: 16 Bit ISA (PC/104 standard) 11. Power supply: Via system bus (through power supply module CX ) 12. Analog input: 4 20 ma for flow rate measurement 13. Analog output: 4 20 ma for dosing pump 14. Digital outputs: 1-channel: 1 for dosing pump and 1 alarm B. ANISE sc Sensor 1. The sensor is designed to connect to a universal digital controller. 2. The sensor cartridge is factory calibrated with all electrodes individually calibrated and also calibrated to each other. 3. The sensor does not require sample conditioning. 4. The sensor can perform one- or two-point inline matrix corrections to adapt it to a wastewater matrix. 5. The sensor is corrosion resistant and fully immersible. C. AMTAX sc 1. The analyzer calibrates and cleans itself automatically. 2. The analyzer is equipped with self-diagnostic routines. 3. The required power supply is 230 Vac/50Hz or optional 115 Vac/50-60Hz connected to a Hach model sc1000 multi-parameter universal controller. 4. Data transmission is made with a data cable with the controller. 5. Outputs include relay, current outputs, and bus interface via the controller. D. Filtrax sc 1. The system provides in-situ filtration. 2. The required power supply is via the analyzer 100 VA and electrical fuse protection. 3. Filter modules are exchangeable. 4. Continuous self-cleaning with air bubbles. 5. Particles larger than 0.15 μm are separated from the sample stream. 6. Available with 5 or 10 m heated filter probe hose E. NITRATAX sc Sensor 1. The sensor is equipped with a self-cleaning wiper system to prevent erroneous values and maintenance problems caused by surface films or particles. 2. The sensor uses no reagents. 3. The sensor compensates for interference from turbidity and organic contamination of up to 150 mg/l. 4. The sensor has the following characteristics: a. Enclosed in corrosion-resistant, V4A stainless steel. b. Uses 2-beam ultraviolet absorption technology with 2-mm path length. c. The measurement beam has a wavelength of 210 nm and is absorbed by nitrate and nitrite. d. The reference beam has a wavelength of 350 nm and is used to compensate for turbidity in the measured medium. 5. The measurement interval is user-selectable from one to 30 minutes. Up to 12 signals can be averaged. F. LDO, Model 2 sc 1. The Hach LDO Probe works with the sc100, sc200, or sc1000 controllers only.

9 Project Name Page 9 2. The sensor is made of polybutyl methacrolate. 3. The probe is made of CPVC and 316 stainless steel The probe is made with Viton o-rings. 5. The probe is entirely corrosion-resistant and fully immersible. 6. The probe utilizes a 1 NPT external thread for mounting hardware connections. 7. The probe does not require sample conditioning or electrolyte solutions. 8. The probe interface to the controller is MODBUS. 9. The operation of the probe is not affected by: H2S, ph, K+, Na+, Mg2+, Ca2+, NH4 +, Al3+, Pb2+, Cd2+, Zn2+, Cr (total), Fe2+, Fe3+, Mn2+, Cu2+, Ni2+, Co2+, CN, NO3, SO4 2, S2, PO4 3, Cl, Anion Active Tensides, Crude Oils, Cl2 < 4 ppm. 10. The probe is factory calibrated and needs no calibration or polarization prior to use. G. sc1000 Digital Controller 1. The sc1000 operates using 100 to 230 Vac, 50/60 Hz power or 24VDC. 2. The sc1000 uses a menu-driven operation system. 3. The display of the sc1000 is 1/4 VGA graphical backlit TFT color touch screen with 320 x 240 pixels resolution. 4. Each probe module of the sc1000 can support up to eight probes. Probe modules can be networked to accommodate more probes. 5. The sc1000 has a data logger. 6. The sc1000 can be equipped with four electromechanical SPDT relays, user-configurable contacts rated 100 to 230 Vac, 5 30 VDC resistive maximum. a. Additional relays are available via digital network connection. 7. The sc1000 can be equipped with up to 12 analog 0/4-20 ma outputs, maximum impedance 500 Ohms per probe module. a. Additional analog outputs are available via digital network connection. b. Optional digital communication via MODBUS (RS-485) or PROFIBUS DP. c. The sc1000 can be equipped with up to 12 analog 0-20 ma inputs, maximum impedance 500 Ohms per probe module. Additional analog inputs are available via digital network connection. 8. Alarms a. Low alarm point b. Low alarm point deadband c. High alarm point d. High alarm point deadband e. Off delay f. On delay 9. Controls a. PID b. High/low phasing c. Set-point d. Dead-band e. Overfeed timer f. Off delay g. On delay 10. Communication a. RS-485 (MODBUS) (optional) b. PROFIBUS DP (optional) c. Ethernet service port (standard) d. All user settings of the sc1000 are retained indefinitely in memory (non-volatile, EEPROM).

10 Project Name Page Components A. Standard Equipment 1. ANISE sc Sensor 2. AMTAX sc 3. Filtrax 4. NITRATAX plus sc Sensor 5. LDO, Model 2 sc 6. sc1000 Digital Controller 7. RTC105 NDN-Module 8. Manual B. Dimensions 1. ANISE sc Sensor: 12.6 x 3.3 inches (320 mm x 84.5 mm) 2. AMTAX sc: 21.3 x 28.3 x 15.4 in. (540 x 720 x 390 mm) 3. Filtrax sc a. Control Unit: 17 x 21 x 9 in. (430 x 530 x 220 mm) b. Module Holder: 4 x 20 x 13 in. (92 x 500 x 340 mm) c. Suction Hose: 5 m (heated) d. Sample Delivery Hose: 2 m (heated or unheated), 10 m (heated) 4. NITRATAX plus sc Sensor a. Length: 13.1 inches (33.3 cm) b. Diameter: 2.8 inches (7.0 cm) 5. LDO, Model 2 sc a. Probe & Sensor Cap 1) Length: 10.0 in. (255 mm) 2) Diameter: 1.94 in. (49.3 mm) b. Integral cable: 30 ft. (10 m) 6. sc1000 Digital Controller: 5.6 x 12.5 x 9.8 in. (142 x 315 x 250 mm) 7. RTC105 NDN-Module: 6.5 in in in. (165 mm 120 mm 96 mm) C. Weight 1. ANISE sc Sensor: 5.3 lb. (2.4 kg) 2. AMTAX sc: 38 lb. (31 kg) 3. Filtrax sc: a. Control Unit: 49 lb. (22 kg) b. Module Holder with 5-m Suction Tube: 20 lb. (9 kg) c. Mounting pipe, 6.6-ft. (2-m): 11 lb. (5 kg) d. Sample Tube, 33-ft. (5-m): 11 lb. (5 kg) 4. NITRATAX sc: 8.2 pounds (3.7 kg) 5. sc1000 Digital Controller: 14.3 lb. (6.5 kg) 6. RTC105 NDN-Module: 1.9 lb (0.9 kg) 2.5 Optional Accessories A. ANISE sc Sensor 1. Cables and power cord 2. Mounting kit a. Rail Mount b. Chain Mount 3. Cleaning unit 4. High Output Air Blast Cleaning Compressor

11 Project Name Page 11 B. AMTAX sc 1. Mounting kits (rail or stand) C. Filtrax 1. Mounting kit for control unit 2. Wall mount kit for module holder D. NITRATAX sc Sensor 1. Bypass panel (flow-through sample cell) for use when direct immersion is sample is impractical 2. Replacement wipers 3. Fixed point installation kit 4. Calibration kit 5. Cable extensions E. LDO, Model 2 sc 1. Plug in extension cables to extend the distance between the sensor and controller up to 985 ft. (10 m). 2. Junction box for extension cables for lengths greater than 100 m. 3. Extension cables 4. Pole mount kit 5. Ball float mount kit 6. In-line union mount kit 7. Flow cell mount kit 8. Economy probe mounting hardware 9. Air blast cleaning assembly F. sc1000 Digital controller 1. Sun shield 2. Internal network connector and cables G. RTC105 NDN-Module 1. None PART 3 EXECUTION 3.1 Preparation A. RTC105 NDN-Module 1. Mount in PLC cabinet on DIN rail B. ANISE sc Sensor 1. The sensor must be installed with the head submerged at least 30 cm below the surface, at least 10 cm above the bottom of the tank, and at least 30 cm from the wall of the tank. C. AMTAX sc 1. Wall-mount indoors or outdoors 2. Rail- and stand-mounting options available D. Filtrax sc 1. The control unit can be wall-mounted or free-standing mounting kit for the control unit can be used. 2. An optional basin wall mount kit available for module holder mounting (submerged) in an aeration basin or effluent channel is also available. The control unit and sample suction hose are equipped with standard heating; also available unheated in several lengths. The filter module holder shall be immersed at the sampling point. E. NITRATAX sc Sensor 1. The optional fixed point installation kit recommended for mounting the probe. 2. The probe can be mounted to a bypass panel when direct immersion in a sample stream is impractical.

12 Project Name Page 12 F. LDO, Model 2 sc 1. Mounting: a. The sensor must be mounted to a Hach mounting assembly directly in the solution to be measured. b. Pole or ball-float mount 2. Distance, analyzer to sensor: 300 meters, maximum G. sc1000 Digital Controller 1. Mount on rail, panel, pipe, or wall 3.2 Installation A. Contractor will install the analyzer in strict accordance with the manufacturer s instructions and recommendation. B. Manufacturer s representative will include a half-day of start-up service by a factory-trained technician, if requested. 1. Contractor will schedule a date and time for start-up. 2. Contractor will require the following people to be present during the start-up procedure. a. General contractor b. Electrical contractor c. Hach Company factory trained representative d. Owner s personnel e. Engineer 3.3 Manufacturer s Service and Start-Up A. Contractor will include the manufacturer s services to perform start-up on instrument to include basic operational training and certification of performance of the instrument. B. Contractor will include a manufacturer s Service Agreement that covers all the manufacturer s recommended preventative maintenance, regularly scheduled calibration and any necessary repairs beginning from the time of equipment startup through to end user acceptance / plant turnover and the first 12 months of end-user operation post turnover. C. Items A and B are to be performed by manufacturer s factory-trained service personnel. Field service and factory repair by personnel not employed by the manufacturer is not allowed. D. Use of manufacturer s service parts and reagents is required. Third-party parts and reagents are not approved for use. END OF SECTION