Exhibit B - Domestic Potable Water System.pdf

US Embassy- London UNCLASSIFIED U.S. Department of State

EXHIBIT B

Statement of Work

Domestic (Potable) Water System

I. GENERAL INFORMATION:

The United States Embassy in 33 Nine Elms Lane, London, SW11 7US requires professional services and contractor cost proposals to perform preventive maintenance services of the Domestic/Potable Water System.

II. PROJECT REQUIREMENTS:

• Winfield House includes but not limited to:

One Domestic Water tank 11000 liter Two Softeners, 188 liter each One UV Sterilizer Four Cartage filters Two Domestic water Heating Tanks External building as described in EXHIBIT C below.

• Wychwood House includes but not limited to:

Two Domestic Water Tanks 2000 liter each One Softener One Domestic Water Heating Tank

• Albany Court includes but not limited to:

Two Domestic Water Heating Tank One Magnetic filter Two Domestic water tanks, 22500 liter each

III. DESCRIPTION OF EQUIPMENT:

The Water Treatment Contractor shall survey the site to record and note all the required information of the system.

IV. GENERAL REQUIREMENTS:

The Contractor under this SOW will be responsible for labor, tools, and materials required to carry out all preventive maintenance as outlined in this SOW. Embassy staff should have service manuals for all equipment included in this SOW. If they do not, the Contractor will assist Embassy Staff in obtaining the manuals and ensure they have been received.

V. SCOPE OF WORK - PREVENTIVE MAINTENANCE

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).

Material Safety Data Sheets (MSDS) shall be provided by the Contractor for all HAZMAT materials. Copies will be provided to the COR for approval.

The Service program shall consist of the embassy facility management staff conducting routine (daily/weekly) operator testing of the potable water treatment systems and monthly e-mailing the results to the service contractor, with copy to OBO/FAC (water_testing_group@state.gov). The Contractor will then be responsible for conducting a technical analysis of the routine potable water treatment testing results from the embassy. The Contractor will then respond to the embassy within 24 hours to direct the embassy facility management staff to make any changes to the treatment plant operations to reestablish effective and efficient potable water treatment to meet water quality standards.

Domestic/Potable Water Treatment Preventive Maintenance (PM)

At a minimum, the following work must be done:

i. Monthly:

1. Check and record the temperatures at the taps.

2. Check and record total and free chlorine in the water tanks and at the taps.

3. Check the water softener. Top up the salt as required. It could be a weekly job.

4. Check and record the PH of the water in the tanks.

5. Check TVC, Coliforms & Ecoli from drinking water outlets.

6. Check and record pressures.

ii. Quarterly (4 times per year)

1. Legionella Sampling and testing.

iii. Semi-annual (2 timer per year)

1. Inspect and service the water softener.

iv. Annul (1 time per year)

1. Carry out inspection and service of the cold-water storage tanks.

2. Clean and Chlorination of the cold-water storage tanks.

3. Clean and Chlorination of the softener tub.

v. Maintenance Procedures:

1. Review daily logs for trends.

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

3. Check system for any signs of leakage.

4. Check all tubing for tightness.

7. Replace the sensors (pH, chlorine, as applicable).

8. Calibrate the new sensors.

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

10. Test unit safety functions:

a. Ensure the alarm relay works.

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

11. Wipe down the unit.

12. Check backwash filter

13. Check softening

14. Flush softening

15. Check dosage/metering

16. Adjust dosage/metering

17. Measure water hardness and adjust system to achieve desired hardness level.

18. Measure water conductivity

19. Measure water pH number

20. Check pressure gauges for proper operation

21. Check density of brine solution in salt tank

22. Check operation of float control in brine

23. Inspect water softening piping, fittings and valves for leaks

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

25. Check operation of automatic fill valve in brine tank

26. Schedule outage with operating personnel.

27. Check cleanliness

28. Check control system

29. Check system functioning

30. Record all test results in the component maintenance log

31. Measure turbidity, free chlorine residual, iron, manganese, total dissolved solids

(TDS), alkalinity, and temperature of finished water

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

33. Check total and free chlorine and pH in all domestic water tanks.

34. Conduct water quality testing to verify maintenance of water quality treatment goals as specified by section 10 of this contract. Have treated water tested by a certified laboratory for an analysis of the following parameters: pH, alkalinity, aluminum, calcium, copper, bromide, fluoride, nitrite, nitrate, orthophosphate, silica, strontium, iron, manganese, lead, magnesium, sodium, chloride, total hardness, total dissolved solids (TDS), turbidity, free chlorine, coliform bacteria, and temperature.

35. Check taps that provide potable water for consumption and analyzed for coliform bacteria. The maintenance contract requires testing of drinking water taps, on the embassy compound for coliform bacteria. 20% of tap/drinking fountains shall be randomly chosen, sampled and analyzed

vi. Safety and Special Handling Description:

36. 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.

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

38. Assure that post water treatment specialists understand the proper operation and maintenance of the equipment and correct any deficiencies found with on-site personnel’s familiarizations with equipment.

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

40. Follow treatment as directed by manufacturer.

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

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

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

44. Maintain records and test results

1. , iron, manganese, lead, magnesium, sodium, chloride, total hardness, total dissolved solids (TDS), turbidity, free chlorine, coliform bacteria, and temperature.

vii. Water Tanks with Controls:

i. Safety & Special Instructions:

1. Perform applicable lockout/tag-out steps of site safety procedures to ensure machinery will not start.

2. Schedule outage with operating personnel.

3. Follow site and manufacturer’s safety procedures.

4. Record and report to the post any equipment damage or deficiencies found while performing this maintenance task.

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

6. Obtain and review manufacturer operation and maintenance instructions.

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

ii. Maintenance Description:

1. Test operation of sluice gate.

2. Operational test of the water tank

3. Test operation of controls.

iii. Maintenance Procedures (where applicable):

1. Examine visible interior of tank including fittings, hatches, ladders, manholes, and hand-holes for signs of corrosion, and correct as indicated.

2. Clean, test and inspect sight glasses, valves, fittings, drains and controls.

3. Clean and inspect tank level control panel.

a. Clean exterior of panel and inspect front panel components for damage.

b. Clean interior panel components of dust and foreign material.

c. Inspect electrical wiring for damage and loose connections.

d. Inspect relays for damaged contacts and signs of over-heating.

4. Operational Test panel/electronic control units and mechanical level control equipment.

a. Verify that all alarm, control, and communication circuits operate correctly.

b. Verify that mechanical level indicator and control devices are functioning properly.

5. Look for presence of contamination (bugs, frogs, snakes, paper, plastic, etc.). Notify the post if found.

6. Tanks should be drained, cleaned, and disinfected as per current U.S. Department of

State Guidelines and local regulations.

7. Return system to service.

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

Parameters Maintenance Levels For Maintenance of Potable Water Quality Treatment Goals

Chlorine Residual 0.2 – 0.5 mg/L in all parts of the distribution system

Microbiological and Chemical constituents Treated water meets U.S. Environmental Protection Agency Primary and Secondary Drinking Water Regulations (40 CFR Parts

141-143) and the applicable local codes standers and regulations.

For Maintenance of Piping and Equipment Corrosion on mild steel Less than 2.0 mpy Pitting attack on mild steel None Corrosion on copper alloys Less than 0.2 mpy Scaling and deposition None

Microbiological fouling 1. No visible deposits

2. No health hazards

3. Total Heterotrophic Plate Count (HPC) less than 500/CFU