Revised Exhibit B - Comprehensive Maint Plan.docx

EXHIBIT B

COMPREHENSIVE MAINTENANCE PLAN

INTRODUCTION

The U.S. Tri-Mission Rome has a requirement to obtain water treatment preventive maintenance services to the various systems within the Tri-Mission compound and official residences, and the Consulates building in Florence and Naples. The intent of this service contract is to preserve the current piping, HVAC equipment systems, domestic hot water heaters, and fire suppression systems, and to establish a cost-effective water treatment program to control water related problems such as corrosion, scaling, general deposits, and microbiological fouling and meet water treatment goals. The water treatment service shall be performed as a combination of physical methods, chemical methods, equipment servicing and testing.

All work shall be executed in accordance with this plan, approved water treatment chemicals, and be compliant with all applicable safety, equipment and building codes and standards.

The Contractor shall provide preventive maintenance services on the following systems:

· Domestic Hot Water Treatment Systems.

· Fire suppression tank water treatment system

· Heating and cooling closed loop water treatment systems

· Cooling tower water treatment systems

· UV water sterilizer systems.

· Chlorination System

· Water Softeners

The Contractor shall perform lab analysis on potable water, domestic hot water, cooling towers’ water, and closed loops’ water.

At a minimum, the Contractor shall perform the work in compliance with the following requirements:

· NSF Standards (National Sanitation Foundation)

· AWWA Standards (American Water Works Association) ANSI Standards

· MSDS Regulations

· ASTM D

· NFPA Codes

· UL Standards

· IEEE Standards

· NEMA Standards

· OSHA Standards

· And all applicable manufacturer O&M and installation instructions/requirements.

OBJECTIVES

The Contractor shall receive and review the US Government CMP and inform in writing the CO of any discrepancies, errors, conflicts, etc., that there are discovered.

The Contractor shall institute and have in place during the entire life of the contract, a quality control process agreed with the COR.

SAFETY HEALTH AND ENVIROMENTAL MANAGEMENT (SHEM)

The Contractor shall take all reasonable and proper safety precautions to prevent death or injury to any person or damage to any property. In particular, all equipment used by the Contractor shall be used in such a manner and maintained so as to minimize the danger of accident, death, injury, loss or damage arising from the use of such equipment. In addition to relevant statutory requirements, standards, and other provisions of this contract, the Contractor shall adhere to the following requirements:

· CLIN prices shall include proper disposal of toxic substances where applicable.

· The Contractor’s personnel shall be knowledgeable with and adhere to all relevant occupational health and safety legislation and MSDS sheets.

· All electrical equipment and associated materials shall comply with UL and or EU requirements.

· All NFPA guidelines against fire, production of smoke or the venting of any noxious substances shall be followed.

· Ensure that the Contractor’s personnel comply with all safety procedures and requirements.

· Ensure that Contractor’s personnel are adequately trained and instructed in the safe and correct usage, handling and operation of materials and equipment relevant to the services and provide reasonable proof of such to the US Embassy Rome on request.

· Ensure the Contractor’s personnel have completed and certified in the occupational health and safety trainings and have been issued all the necessary Personal Protection Equipment (PPE) required for a safe implementation of this contract.

SPECIFICATIONS

All equipment, chemicals, reagents, testing procedures and kits shall be approved by the COR prior to their use.

The Contractor will be responsible for submitting the manufacturer specifications, MSDS sheets and equipment cut sheets for all equipment, chemicals (including chemical composition), and testing procedures in both English and Italian languages.

HVAC Water Treatment Systems closed loop:

· For what concerns heating and cooling systems, the Contractor shall use complex organic components-based corrosion and scale inhibitor designed for closed hot and chilled recirculating water systems. The product concentration shall be maintained between 4-6 kg /m3. The product shall be in a liquid form with a pH level ranging from 7.2 to 8.2. The density of the product shall be between 1.10 to 1.14 kg/L and shall not contain any sodium nitrites. The chemicals shall be compatible with propylene glycol.

· For what concerns cooling towers, the Contractor shall use quaternary ammonium polymers based anti-algae/biocide designed for cooling towers. The product shall be injected directly into the cooling tower water basin and shall be controlled by a temporized dosing pump. The product dose shall be between 15 and 40 ppm. The product shall be added after every water blow-off.

The Contractor shall use corrosion inhibitors designed for cooling towers water systems which shall be added to the make-up water flow with a concentration between 20-30 g/m3.

· The hot water/chilled water filter media shall be rated at 98 percent efficiency for 20 micrometer particulates. The filters shall fit in the Embassy’s current filtration unit.

DESCRIPTION OF SERVICES

The Contractor shall provide the required chemical products and necessary services to apply the chemicals, monitor their performance, and report the results. The Contractor shall:

1) Preserve the interior waterside of current piping, HVAC equipment, water heater heat exchanger, and sprinkler piping/equipment.

2) Reduce operating costs and establish a cost-effective water treatment program to control water related problems such as corrosion, scaling, general deposits, and microbiological fouling.

3) Ensure the proper operation of water treatment equipment including UV water sterilizer.

The Contractor shall furnish and install at his own expense the following equipment:

· Dosing equipment and all associated components needed. The dosing equipment shall be Contractor’s proprietary equipment and his responsibility to operate and maintain it.

· UV bulbs (To be replaced every 9000 hours or if damaged)

· Filter medias

· Supply of salt near (to be delivered near the water softener) for all softeners is included in this contract.

· The Contractor shall visit the Embassy on a monthly basis according with the heating and cooling seasons.

· The Contractor shall provide quality chemicals products and have a storage life expectancy of at least 1 year.

· The Contractor shall establish minimum and maximum control ranges for each chemical treatment and avoid unnecessary high levels of chemicals to mitigate cost and adverse chemical reactions from improper high level chemical dosage.

· The Contractor shall provide an 8-hour in-house training on the water treatment startup, and every year an 8-hour training to the U.S. Embassy personnel on water treatment tests, control ranges for each treatment chemical, safe handling of equipment and chemicals, and new water treatment procedures/technologies.

· The Contractor shall review the facility water treatment logs and the operating logs to verify that chemicals are within design parameters.

· The Contractor shall discuss the water treatment conditions with the COR and operating engineers on a semi-annual basis and follow up with a written service report within 10 business days after each visit. The report shall be in English and contain the results of Contractor’s on-site water treatment and laboratory tests, comment on the status of each system, and specific recommendations for action if necessary.

PREVENTIVE MAINTENANCE PROCEDURE

The Contractor shall provide all materials, supervision, labor, tools and equipment to perform preventive maintenance. All personnel working in the vicinity shall wear and /or use safety protection while all work is performed. Any questions or injuries shall be brought to the attention of the Post Occupation Safety and Health Officer (POSHO). Safety Data Sheets (SDS) shall be provided by the Contractor for all HAZMAT materials. Copies will be provided to the COR for approval. The Contractor shall translate in Italian the following checklist and submit them for COR approval.

DOMESTIC HOT WATER TREATMENT SYSTEMS (A)

The domestic hot water systems shall be treated with polyphosphate-based products that are certified for human consumption, in order to maintain in suspension, the calcium in the water, thus avoiding the formation of deposits inside the piping, the exchangers and accumulations.

At a minimum, the following work shall be accomplished:

Monthly:

i. Tools

1. Mechanical tools

2. Electrical tools

3. Analysis kit

4. PPE

ii. Safety and Special Handling Description:

1. The worker must wear all the PPE required by the safety plan.

2. Chemicals must comply with the Environmental Protection Agency (EPA) regulations, ANSI/NSF Standard 60 Certification and be handled in accordance with occupational safety requirements. Employ personal protection against corrosive or hazardous treatment chemicals as appropriate.

3. Be familiar with the Safety Data Sheets of any chemicals used in the water treatment program

4. Assure that the worker understands the proper operation and maintenance of the equipment and correct any deficiencies found with on-site personnel’s familiarizations with equipment.

5. Water treatment must be based on proven standard engineering practices and Post specific water treatment goals.

6. Follow treatment as directed by manufacturer.

7. Maintenance includes chemicals, chemical feeding, maintaining proper water conditions, controlling bleed off, protecting idle equipment, and record-keeping.

8. Ensure chemicals are properly stored, test equipment clean, and that chemicals have not passed expiration date.

9. All tests shall conform to the manufacturer test procedures and standard values.

10. Maintain records and test results

iii. Maintenance Procedures:

1. Check chemical levels in the chemical addition tank. Adjust chemical level and clean tank if necessary.

2. Check system for any signs of leakage

3. Check all tubing for tightness

4. Inspect and clean metering pumps:

a. Check the pump for damage, clean.

b. Clean all the equipment

c. Check for correct feed.

d. Check electrical connections for wear.

e. Clean (replace if needed) filters, flow cell, and fittings.

5. Check chemical addition tanks to ensure no damage or leakage.

6. Test unit safety functions:

a. Ensure the alarm relay works.

b. Check the function of the flow sensor and ensure the controller stops.

7. Verify maintenance records for all components of the water treatment system.

8. Read and note the water meter reading and calculate consumption since last visit. Reading must be handed to the COR in writing every month.

9. Perform water analysis on each system for the following chemical parameters:

a. pH

b. Total dissolved solids

c. Conductivity

d. Chloride

Biannually

i. Tools

1. Mechanical tools

2. Electrical tools

3. PPE

ii. Safety and Special Handling Description:

1. The worker must wear all the PPE required by the safety plan.

2. Chemicals must comply with the Environmental Protection Agency (EPA) regulations, ANSI/NSF Standard 60 Certification and be handled in accordance with occupational safety requirements. Employ personal protection against corrosive or hazardous treatment chemicals as appropriate.

3. Be familiar with the Safety Data Sheets of any chemicals used to clean the water tanks and tube bundles.

4. Assure that the worker understands the proper operation and maintenance of the equipment and correct any deficiencies found with on-site personnel’s familiarizations with equipment.

5. Tanks and tube bundles cleaning must be based on proven standard engineering practices and Post specific goals.

6. Follow cleaning operations as directed by manufacturer.

7. Ensure chemicals are properly stored, test equipment clean, and that chemicals have not passed expiration date.

iii. Maintenance Procedures:

1. Shut off both the polyphosphate dosing pump and the DHW recirculation pumps

2. Close all valves to isolate the DHW tank from both heating system and users.

3. Check valves for any signs of leakage

4. Connect the drain pipe to the nearest drain.

5. Ensure that the drain is not clogged

6. Open the drain valve and drain all the water from the DHW tank

7. Flush the DHW tank with fresh water and drain it to remove all suspended calcium residues

8. Uninstall the tube bundle

9. Clean the tube bundle with compliant chemical products. Use metal brush if needed

10. Replace the anode

11. Reinstall the tube bundle

12. Perform the sanitization of the DHW tank with compliant chemical products

13. Flush the DHW tank with fresh water and drain it to remove any chemical residue that could harm human health. Water and chemicals must be disposed as per local regulation. The contractor will hand over to the COR the proof of the correct disposal of such materials (formulario rifiuti). At no time, chemicals must be disposed by discharging through the drains.

14. Recharge the DHW tank

15. Open cold-water valve and ensure that all the water is purged from the tank

16. Once the DHW is full open all the valves and put it back to normal operation

CLOSED LOOPS SYSTEMS WATER TREATMENT (B)

At a minimum, the following work shall be accomplished:

Monthly:

Water Treatment System, Closed Loop

i. Safety & Special Instructions:

1. Chemicals must comply with the Environmental Protection Agency (EPA) regulations and handled in accordance with occupational safety requirements. Employ personal protection against corrosive or hazardous treatment chemicals as appropriate.

2. Be familiar with the Material Safety Data Sheets of any chemicals used in the water treatment program.

3. Water treatment specialists must be properly trained and certified.

4. Water treatment must be based on proven standard engineering practices.

5. Follow treatment as directed by manufacturer and in accordance with requirements specified under Section 10.

6. Maintenance includes chemicals, chemical feeding, maintaining proper water conditions, controlling bleed off, protecting idle equipment, and record keeping.

7. Ensure chemicals are properly stored; test equipment clean, and that chemicals have not passed expiration date.

8. Maintain records and test results.

9. All tests shall conform to the manufacturer test procedures and standard values.

ii. Maintenance Description:

1. Inspect system and complete water analysis.

iii. Maintenance Procedures:

1. Sample water from the closed loop system per manufacturer’s recommendations.

2. Test for the proper levels of chemicals in the closed loop system and adjust chemical feeds as necessary to maintain optimal conditions in the system.

3. Record test results in a logbook.

4. Use the conductivity meter to test for total solids and plot in a logbook. Record and analyze abnormal changes.

5. Check the total conductivity of the system with a conductivity meter. Record results in a logbook.

6. Check pH with the pH test strips and/or pH meter.

7. Clean sample bottles and wipe down all chemical treatment equipment.

iv. Process Instrumentation Engineer Checks and Adjustments

1. Visual inspection for the controller, sensor, pumps, tubing and other accessories

2. Testing of the chemical parameters

a. pH

b. Total dissolved solids

c. Conductivity

d. Chloride

e. CaCO3 Hardness

f. Total Hardness

3. Calibration of the sensor with known standard

4. Process calibration of conductivity by a calibrated instrument with a known standard

5. Make sure that the controller is functioning properly.

6. Make sure that the solenoid valves, contact water meter, inhibitor pump and biocide/corrosion inhibitor pumps are physically functioning properly as per the settings in the controller.

7. Make sure that the chemical is dosed only as per the specification

8. Only for cooling towers: test the correct functioning of the conductivity sensor and of the automatic water blow off system.

9. Only for cooling tower: test the cooling tower’s water basin to ensure that there is a concentration of corrosion inhibitor of at least 150 ppm

10. Submit service report with detailed description of errors and causes (if any) and corrective action taken.

The water treatment Contractor shall determine the dosage levels of chemicals and stay within the specified operating parameters:

2. No health hazards

3. Total aerobic count less than 10,000/ml

1. No visible deposits

2. No health hazards

3. Total aerobic count less than 10,000/ml

Note:

The maintenance operation services of the Heating plant shall be suspended during the cooling season.

The maintenance operation services of the Cooling plant shall be suspended during the heating season.

UV STERILIZER (C)

Annual:

i. Safety & Special Instructions:

1. Electrician’s tool set.

2. Cleaning materials

ii. Maintenance Description:

1. Schedule outage with operating personnel.

2. Follow site safety procedures and your supervisor’s instructions.

3. Record and report any equipment damage or deficiencies found during this maintenance task.

4. Record all test results in the component maintenance log.

5. Obtain and review manufacturers operation and maintenance instructions.

iii. Maintenance Procedures:

1. Inspect for leaks.

2. Check lamp operation-lamp out alert alarm.

3. Check low UV intensity alarm

4. Check high temp alarm.

5. Inspect cooling fins.

6. Clean the exterior of the unit.

7. Check electrical conductors for burning or damage.

8. Check electrical connections for tightness.

9. Read and note the UV lights radiation from the control panel

10. Clean the interior of the unit with a vacuum.

11. Inspect lamp sockets.

12. Replace the lamps.

13. Replace the o-rings

14. Clean the quartz sleeves.

15. Read and note the UV lights radiation from the control panel

16. Test the telephone dialer alarm system (where available)

FIRE SUPPRESSION TANK WATER TREATMENT (D)

The Contractor shall treat the fire suppression system’s water with anti-algae and sodium hypochlorite. Water is stored in in a 80 m3 concrete tank which is equipped with a recirculation pump and two separates water treatment dosage system.

The Contractor will be responsible of the maintenance of the water treatment systems and of checking chemical levels in the chemical addition tanks. The contractor will adjust chemical levels and clean tanks if necessary.

The Contractor shall perfom this operation on a monthly basis providing the products necessary for the treatment. These products shall be included in the contract price.

Monthly

i. Tools

1. Mechanical tools

2. Electrical tools

3. Analysis kit

4. PPE

ii. Safety and Special Handling Description:

1. The worker must wear all the PPE required by the safety plan.

2. Chemicals must comply with the Environmental Protection Agency (EPA) regulations, ANSI/NSF Standard 60 Certification and be handled in accordance with occupational safety requirements. Employ personal protection against corrosive or hazardous treatment chemicals as appropriate.

3. Be familiar with the Safety Data Sheets of any chemicals used in the water treatment program

4. Assure that the worker understands the proper operation and maintenance of the equipment and correct any deficiencies found with on-site personnel’s familiarizations with equipment.

5. Water treatment must be based on proven standard engineering practices and Post specific water treatment goals.

6. Follow treatment as directed by manufacturer.

7. Maintenance includes chemicals, chemical feeding, maintaining proper water conditions, controlling bleed off, protecting idle equipment, and record-keeping.

8. Ensure chemicals are properly stored, test equipment clean, and that chemicals have not passed expiration date.

9. All tests shall conform to the manufacturer test procedures and standard values.

10. Maintain records and test results

iii. Maintenance Procedures:

1. Check chemical levels in the chemical addition tanks. Adjust chemical levels and clean tanks if necessary.

2. Check systems for any signs of leakage

3. Check all tubing for tightness

4. Inspect and clean metering pumps:

a. Check the pumps for damage, clean.

b. Clean all the equipment

c. Check for correct feed.

d. Check electrical connections for wear.

e. Clean (replace if needed) filters, flow cells, and fittings.

5. Check chemical addition tanks to ensure no damage or leakage.

6. Test unit safety functions:

a. Ensure the alarm relay works.

b. Test the water low level alarm

7. Verify maintenance records for all components of the water treatment system.

8. Perform tank’s water analysis for the following chemical parameters:

a. pH

POTABLE WATER LAB ANALYSIS (E)

Annual:

The Contractor shall provide certified lab analysis of the potable water for at least the following parameters:

a. pH

b. Total dissolved solids

c. Conductivity

d. Lead

e. Copper

f. Arsenic

g. Trihalomethane

h. Haloaceticacids (HAA5)

i. Escherichia Coli

j. Total Coliforms

k. Streptococchi and Enterococchi

l. Pseudomonas aeruginosa.

The required analysis shall be certified by a chemical laboratory accredited by the Order of Chemists.

The samples shall be taken directly from the faucets of the users.

The collection of samples shall be coordinated with the COR in advance.

The results of the analyses shall be sent to the COR via e-mail within 30 calendar days from the date of sample collection. A copy of the report shall be kept by the Contractor.

Note: Villa Grazioli Bldgs. A & B only.

The analysis will be perfomed alternately, every other year, as per following schedule:

Villa Grazioli Bldg. A: Base Year, Second Year Option, and Fourth Year Option;

Villa Grazioli Bldg. B: First Year Option, and Thrid Year Option.

CLOSED LOOPS WATER LAB ANALYSIS (F)

Semi-Annual:

The Contractor shall provide certified lab analysis of the water in the loops of the following:

a. pH

b. Total dissolved solids

c. Conductivity

d. Aerobic Plate Count

e. Corrosion Inhibitor dosage

f. Biocide dosage

g. Iron

h. Manganese

i. Alkalinity

j. Total hardness

k. Chloride

The required analysis shall be certified by a chemical laboratory accredited by the Order of Chemists.

The samples shall be taken directly from the closed loop.

The collection of samples shall be coordinated with the COR in advance.

The results of the analysis shall be sent to the COR via e-mail within 30 calendar days from the date of sample collection. A copy of the report shall be kept by the contractor.

DOMESTIC HOT WATER AND COOLING TOWERS LAB ANALYSIS (G)

Annual:

The Contractor shall provide certified lab analysis of the potable water for at least the following parameters:

a. Trihalomethane

b. Haloaceticacids (HAA5)

c. Escherichia Coli

d. Total Coliforms

e. Streptococchi and Enterococchi

f. Pseudomonas aeruginosa.

g. Legionella Pneumophila

The required analysis shall be certified by a chemical laboratory accredited by the Order of Chemists.

The samples shall be taken directly from the faucets of the users.

The collection of samples shall be coordinated with the COR in advance.

The results of the analysis shall be sent to the COR via e-mail within 30 calendar days from the date of sample collection. A copy of the report shall be kept by the contractor.

WATER SOFTENER (H)

Semiannual:

i. Tools

1. Mechanical tools

2. Electrical tools

3. Analysis kit

4. PPE

ii. Safety and Special Handling Description:

1. The worker must wear all the PPE required by the safety plan.

2. Chemicals must comply with the Environmental Protection Agency (EPA) regulations, ANSI/NSF Standard 60 Certification and be handled in accordance with occupational safety requirements. Employ personal protection against corrosive or hazardous treatment chemicals as appropriate.

3. Be familiar with the Safety Data Sheets of any chemicals used in the water treatment program

4. Assure that the worker understands the proper operation and maintenance of the equipment and correct any deficiencies found with on-site personnel’s familiarizations with equipment.

5. Water treatment must be based on proven standard engineering practices and Post specific water treatment goals.

6. Follow treatment as directed by manufacturer.

7. Maintenance includes chemicals, chemical feeding, maintaining proper water conditions, controlling bleed off, protecting idle equipment, and record-keeping.

8. Ensure chemicals are properly stored, test equipment clean, and that chemicals have not passed expiration date.

9. All tests shall conform to the manufacturer test procedures and standard values.

10. Maintain records and test results

iii. Maintenance Procedures:

1. Check with building personnel for report of water softener effectiveness.

2. Check pressure gauges for proper operation.

3. Check density of brine solution in salt tank.

4. Check operation of float control in brine.

5. Inspect water softener piping, fitting and valves for leaks.

6. Lubricate valves and motors.

7. Make minor adjustments to water softener controls if required.

8. Inspect softener base and brine tank for corrosion and repair as needed.

9. Check operation of automatic fill valve brine tank.

10. Check softener electrical wiring and phasing.

11. Cleaning of the softener tank, remove the salt sediment and check of the valve system

12. Clean up area around softener.

13. Check the level sodium (sodium has not to be more than 200 mg/Liter)

14. Fill out maintenance report and report deficiencies.

CHLORINATION SYSTEM (I)

Monthly:

i. Tools

1. Mechanical tools

2. Electrical tools

3. Analysis kit

4. PPE

ii. Safety and Special Handling Description:

1. The worker must wear all the PPE required by the safety plan.

2. Chemicals must comply with the Environmental Protection Agency (EPA) regulations, ANSI/NSF Standard 60 Certification and be handled in accordance with occupational safety requirements. Employ personal protection against corrosive or hazardous treatment chemicals as appropriate.

3. Be familiar with the Safety Data Sheets of any chemicals used in the water treatment program

4. Assure that the worker understands the proper operation and maintenance of the equipment and correct any deficiencies found with on-site personnel’s familiarizations with equipment.

5. Water treatment must be based on proven standard engineering practices and Post specific water treatment goals.

6. Follow treatment as directed by manufacturer.

7. Maintenance includes chemicals, chemical feeding, maintaining proper water conditions, controlling bleed off, protecting idle equipment, and record-keeping.

8. Ensure chemicals are properly stored, test equipment clean, and that chemicals have not passed expiration date.

9. All tests shall conform to the manufacturer test procedures and standard values.

10. Maintain records and test results

iii. Maintenance Procedures:

1. Check chemical levels in the chemical addition tanks. Adjust if necessary.

2. Check system for any signs of leakage.

3. Check all tubing for tightness.

4. Wipe down all equipment.

5. Service the metering pumps

a. Check the pump diaphragm for damage.

b. Check chemical seepage at vent hole.

c. Check that the discharge tubing is connected firmly to the liquid end.

d. Check that the liquid end is generally watertight (especially vent hole)

e. Check for correct feed: run the Beta run for a short period (press both arrow keys together).

f. Check electrical connections for wear.

g. Check that liquid end screws are fastened tightly to a torque of 4.5 to 5 Nm.

6. Clean and calibrate the chlorine and pH sensors.

7. Check the right functioning of dosing pump through the using of flow test

8. Perform water analysis with test kit of the parameters

9. Check probe readings and check the probe calibration

Semiannual:

i. Tools

1. Mechanical tools

2. Electrical tools

3. Analysis kit

4. PPE

ii. Safety and Special Handling Description:

1. The worker must wear all the PPE required by the safety plan.

2. Chemicals must comply with the Environmental Protection Agency (EPA) regulations, ANSI/NSF Standard 60 Certification and be handled in accordance with occupational safety requirements. Employ personal protection against corrosive or hazardous treatment chemicals as appropriate.

3. Be familiar with the Safety Data Sheets of any chemicals used in the water treatment program

4. Assure that the worker understands the proper operation and maintenance of the equipment and correct any deficiencies found with on-site personnel’s familiarizations with equipment.

5. Water treatment must be based on proven standard engineering practices and Post specific water treatment goals.

6. Follow treatment as directed by manufacturer.

7. Maintenance includes chemicals, chemical feeding, maintaining proper water conditions, controlling bleed off, protecting idle equipment, and record-keeping.

8. Ensure chemicals are properly stored, test equipment clean, and that chemicals have not passed expiration date.

9. All tests shall conform to the manufacturer test procedures and standard values.

10. Maintain records and test results

iii. Maintenance Procedures:

1. Check chemical levels in the chemical addition tanks. Adjust if necessary.

2. Check system for any signs of leakage.

3. Check all tubing for tightness.

4. Wipe down all equipment.

5. Service the metering pumps

a. Check the pump diaphragm for damage.

b. Check chemical seepage at vent hole.

c. Check that the discharge tubing is connected firmly to the liquid end.

d. Check that the liquid end is generally watertight (especially vent hole)

e. Check for correct feed: run the Beta run for a short period (press both arrow keys together).

f. Check electrical connections for wear.

g. Check that liquid end screws are fastened tightly to a torque of 4.5 to 5 Nm.

6. Clean and calibrate the chlorine and pH sensors.

7. Check the right functioning of dosing pump through the using of flow test

8. Perform water analysis with test kit of the parameters

9. Replace the chlorine and pH sensors

10. Calibrate the new sensors.

11. Clean and refill “stock” solution tanks with fresh chemicals.