W912LR20B0016 Questions and Answers.pdf

W912LR20B0016 Fort Allen Elevated Water Tank Maintenance and Repairs

Questions and Answers

August 17, 2020

1-The scope of work (SoW) only includes the interior surface area of the tank?

Yes, the scope only includes the interior surface of the tank.

2-The tank contains lead-based paint?

No lab results are available at this time for the exterior paint. All work will be perform in the interior of the tank and this same task was performed in the past in 2016.

3-Water and electricity to carry out the entire project will be supplied by the facilities of Fort

Allen Training Center (FATC)?

Yes, water and electrical connections may be provided; however, contractor is responsible for all connections to existing utilities.

4-The disposal of the water generated in the project could be done in the Fort Allen Training

Center (FATC) facilities? It will not be removed outside the Fort Allen facilities?

Any contaminated water generated by the pressure wash or wall blasting must be disposed in a proper landfill or treatment plant. No residue of this process will remain on the facility. Is the responsibility of the contractor to obtain any permit related to this process. The contractor will be responsible of removing (Filtering) the solids in the residual water before disposing into our sewer system at Fort Allen. Solids will be dispose by the contractor.

5- The disposal of the water generated in the project by the disinfection and chlorination process could be done in the Fort Allen Training Center (FATC) facilities? It will not be removed.

The chlorinated water must be disposed thru the sanitary sewer system. The contractor must consider the equipment necessary for this process. The contractor will be responsible of removing (Filtering) the solids in the residual water before disposing into our sewer system at Fort Allen. Solids will be dispose by the contractor. The residual water could be dispose into our Sewer system as long as it does not contains any hazardous material.

6- The disinfection process and / or method will be selected by the contractor in compliance with the standards?

Disinfection process and method shall be selected by the contractor as long as it complies with AWWA and the contractor presents evidence of such compliance. A certified independent laboratory must conduct the test.

7- The disinfection method could be (HPWC) high pressure water cleaning with surface chlorination according to AWWA standards?

See answer to question 6

8- A hydrostatic test will be required? If the answer is Yes, how much volume (gallons) and / or capacity % will it be?

The hydrostatic test must be done at maximum operation capacity.

9- What is the total interior surface area for the anticorrosive coating-lining?

Use attached drawing.

10- What are the dimensions of the tank?

Use attached drawing.

11-What is the diameter of the tank?

Use attached drawing.

12-What is the height of the shell-wall?

Use attached drawing.

13-What is the surface area of the roof?

Use attached drawing.

14-What is the surface area of the shell-wall?

Use attached drawing.

15-What is the surface area of the Bottom-floor?

Use attached drawing.

16-What is the capacity and / or volume of water storage in the tank?

The tank capacity is 150,000 gallons.

17- Will drawings, as-built or manufacturer specifications be available? Can you provide them for the development of our proposal?

At this moment we don’t have an as-built for the tank. The contractor must provide a certified as-built drawing in paper and in AutoCAD.

18- What is the elevation of the tank with respect to the ground?

Use attached drawing.

19-What is the elevation of the tank sidewalk-walk around from the ground?

Not Available.

20-What is the elevation of the tank roof from the ground?

Not Available.

21-What is the elevation of the tank floor-bottom from the ground?

Not Available.

22-Has any previous repair been done?

See attached report.

23- The Statement of Work (SoW) indicates in subsections [2.1.8 Quality Assurance, 2.1.9

Quality Assurance Surveillance Plan (QASP) and the 2.1.10 Quality Control] that the contractor must perform everything in accordance with the acceptable standards. This means that we must have a (National Association of Corrosion Engineers) NACE certified coating inspector

Level 3 during all stages of the project?

24-Due to the requirements and the magnitude of the project a NACE Certified Coating

Inspector Level 3 will be required?

Yes

25-The development and implementation of the quality control plan will be in charge of the

NACE Certified Coating Inspector Level 3?

Yes

26- Paint manufacturers and standards require that the quality control technician and the technician who will perform all tank coating-lining integrity tests be an NACE Certified Coating

Inspector Level 3. This requirement will be considered?

Yes

27-Tank Coating and Corrosion Condition Assessment must be carried out in accordance with

NACE and SSPC standards?

Yes

28- For the guarantee, a certified, signed and / or sealed final report must be presented by the

NACE Level 3 Inspector?

Yes

29- The NACE Certified Coating Inspector Level 3 credentials must be submitted as part of the auction documents?

Yes

30-With our experience we understand that zinc-rich primer coating should not be applied inside the tank for immersion and use for potable water. Could you clarify this approach? Will the zinc-rich primer coating be used?

The specified product is water safe. If any contractor has a new adverse information related to the application of the product the information must be submitted in writing.

This information must be supported with technical data.

31- As part of the quality control plan, the following tests will be required?

(Adhesion Test per ASTM D4541, Holiday Test per NACE SP-0188, WFT, DFT SSPC-PA2 with UT digital, Ambient-climatic Conditions, SSPC surface preparation visual reference (SSPC-VIS 1), surface profile per ASTM D 4417-B & ASTM D 4417-C, surface non visible contamination test (salts) per

SSPC Guide 15 Method:A2.)

The test required for this contract are the required test by the product manufacturer and the Puerto Rico Department of Health. Any additional test is encourage but not required.

32- With the purpose of removing the water and all the material generated during the project, Can be opened and removed the manhole cover located at the bottom of the main water discharge outlet pipe-vertical pipe raiser?

Any contaminated water generated by the pressure wash or wall blasting must be disposed in a proper landfill or treatment plant. No residue of this process will remain on the facility. Is the responsibility of the contractor to obtain any permit related to this process. Yes as long as all solids are removed before discharge and no presence of hazardous material or waste.

33- The Tank has been tested for integrity in accordance with the standards of (AWWA, API or

NACE)?

No. Please include a complete assessment with a written report.

34- The Statement of Work (SoW) indicates in subsections 5.1.2.1 Repairs, There is an established area and/or length of seam welds to be repaired? Ex: (square feet or linear feet).

An allowance has been included for this purpose.

35- The seam welds areas to be repaired must be identified, inspected and evaluated by the

NACE Level 3 Certified Inspector?

Yes

36- The seam welds areas to be repaired must be inspected and evaluated using the visual surface comparator prior to coating application according to NACE SP0178 Standard?

NACE SP0178 Standard Practice: (Design, Fabrication and Surface Finish Practices for Tanks and

Vessels to be Lined for Immersion Service).

37- The Statement of Work (SoW) indicates in subsections 5.1.4.9 Anniversary Inspections, for these inspections in compliance with the coating manufacturer and standards, the NACE Level 3

Certified Inspector will be required?

38- The Statement of Work (SoW) indicates in subsections 5.1.3.8.2 Primer Coat, There is an established surface area (square feet) for the Sherwin Williams Steel Seam FT-910 product?

A surface area is not specified in this statement, the (SoW) specified that the payment shall be based on unit pricing provided by the Contractor in the bid. Can clarify this (SoW) condition?

Use the available information to estimate.

39- The tank has various antennas/receivers around the tank sidewalk. Will this be removed or turn off prior to begging the work?

The existing antennas can only be removed by their owner. If any antennas need to be removed it will be coordinated with the company and they will be responsible for the process.

40- If the antennas/receiver will be removed, who will remove them FATC personnel or the contractor? If the contractor personnel have to remove the antennas/receiver, will they need any specific certification?

The antennas will not be remove. Yes, It will be turned off. The existing antennas can only be removed by their owner. The Owner of the antennas will emit a certification or evidence that the antennas are currently OFF and will not be an emission risk.

41- If the contractor is responsible for removing the antennas/receivers, how will the contractor know they are working properly, who will secure the electrical system, who will take possession of them once removed and will the contractor have to install them back once the work is completed?

Refer to Question 40.

42- If the antennas/receivers will be left on the tank who will turn off and secure them?

Refer to Question 40.

43- How will the contractor rest assure that the antennas/receivers will stay off and secured during all the period of performance?

The contractor must conduct his operation with prudence and taking care of the existing antennas. Refer to Question 40.

44- If for some reason the antennas/receivers had to be turned on during the period of performance, will the contractor receive an extension of contract covering those days of work missed because of the antennas/receivers were working?

Antennas will be off for the duration of the project. If for some reason, the antennas need to be turned ON the contractor will be notice and those lost time will be negotiated for possible time extension only. The contractor must consider two months for any delay due to the antennas.

45- How will the contractor rest assure the antennas/receivers are not receiving any signal?

The antennas are receiving signal. The contractor must consider that and must conduct the operation accordingly. Refer to Question 45.

46- What style elevated tank is the tank?

Contractor will receive a sketch with the dimensions of the tank, height, diameter, and other information used for last inspection. At this moment we don’t have an as-built for the tank. The contractor must provide a certified as-built drawing in paper and in

AutoCAD.

47- What is its size or capacity?

Refer to Question 16

48- What is the height?

Ground level to base of tank is approximately 100 feet. From Base of Tank to top of hatch approximately 28 feet. Diameter is 32 feet. Refer to Question 46

49- Is the last inspection report available?

Yes and will be provided.

50- Are drawings available for the tank?

No. Refer to Question 17 and 46

51- We need the measurements, dimensions or elevation of this tank.

Refer to Question 17 and 46

52- Please advise if the scope of work is only going to be in the interior of the tank or if the exterior is going to be included. Interior Only

a) The SOW says: 5.1.1.2 All interior steel surfaces shall be prepared in the shop in accordance with SSPCSP10 "Near White Blast Cleaning". Steel shall be thoroughly cleaned of rust, mill scale, dirt and all other foreign substances. Also, please specify any test requirement for procedure compliances.

The contractor shall use tests required to certify the water tank to assure compliance with

The contractor shall conduct tests in accordance with UFC 3-230-02 O&M Water Supply

Systems, Paragraph 10-8, Tanks and Reservoirs for standards of maintenance and inspections: https://www.wbdg.org/FFC/DOD/UFC/ufc_3_230_02_2019.pdf. Best practices for inspection, painting and maintenance can be found in AWWA M51.

Further information can also be found in UFC 3-230-01 Water Storage and Distribution:

https://www.wbdg.org/FFC/DOD/UFC/ufc_3_230_01_2018_c2.pdf. The intent of these repairs is to have certified for potable water storage and distribution.

53- There is no amount of feet identify for welding repairs, can you provide an estimated amount to be included in the price or we can provide a price per linear feet.

No, the contractor shall use the attached drawing for estimation.

54- During the pre-bid someone mentioned that scope was going to include the external paint but I have not received any addendum at all.

That was a miscommunication. The scope of the project is for INTERIOR ONLY.

55- In Item 5.1.4.9.1 mention the inspection of internal external but this Scope only include internal, can you clarify?

Contractor shall inspect the exterior to assure conditions of the exterior do not affect interior repairs.

https://www.wbdg.org/FFC/DOD/UFC/ufc_3_230_02_2019.pdf https://www.wbdg.org/FFC/DOD/UFC/ufc_3_230_01_2018_c2.pdf