Attachment A - Responses to RFI.pdf

Attachments: RFIs.pdf

1. During the pre-bid site visit, it was mentioned that areas above the ceilings in Buildings 92 and 93 may have asbestos.

1. Please provide information about the existence of asbestos in areas where we have to install fiber optic lines, and any other asbestos we may encounter on the project.

VA to provide existing asbestos survey reports. VA stated during design no asbestos in our area of work.

2. If asbestos does exist above the ceilings, can we install fiber optic lines in conduit below the ceilings?

VA stated during design no asbestos in our area of work.

2. The pathway shown for the underground fiber optic lines is sometimes directly below the center of the roadway between Bldg 176 and Bldg 92. May we run the underground conduit in the grass, next to the roadway, whenever possible to reduce the amount of the cutting and patching of the asphalt roadways?

Bid and install as shown. Contractor to provide credit if routed in grass and VA to review/decide if acceptable.

1. Specification for Plumbing section 22 05 011 part 3.7A Cleaning and Painting: It states the plant facilities, equipment and systems shall be thoroughly cleaned and painted.

Please clarify that the intent of the painting is only limited to the new work.

Yes, unless existing noted in drawings and specifications.

2. Section 22 05 19 Part 2.1 Turbine Water Meter: Please provide a recommended manufacturer.

After award if available AE will provide. Contractor to provide in submittal.

3. Section 22 05 23 Valves part 1.4 Submittals: Please provide the names of recommended valve manufacturers for the following: Gate Valves, Butterfly Valves, Check Valves, and Surge/ Back pressure Valves.

After award if available AE will provide. Contractor to provide in submittal.

4. Section 22 07 11 Plumbing Insulation: Please specifically state what lines and equipment are to be insulated. Existing booster pump piping, valves and fittings are not insulated.

Specification Part 3.1B calls for equipment to be insulated. Please clarify.

Follow spec requirements.

5. Section 22 11 23 part 2.3 Domestic Water Pressure Booster System: We would like to get clarification regarding the water pressure booster system that is required on this project. In the specification it is clearly stated that a factory fabricated, pretested pumping system be supplied that includes all pumps, motors, controls, VFD’s, valving and discharge materials all installed on a common structural steel skid. The associated pumping station drawing (SA-01-23 PP-101) indicates a field built in place pumping station utilizing the existing concrete structure (Deep area and shallow area trench). It would be very difficult to supply a prefab system utilizing vertical turbine pumps as the basis of design per pump manufacturer peerless. Please provide us with a photo of the entry level room for access and potential rigging whether there is a monorail or hoisting system in the entry room including its load capacity.

Contractor to verify/review and take photo during prebid walkthru.

6. Drawing PP-101 items 4 & 6 states that all pipe fittings and valves In the building & pit shall be https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fstorage.procore.com%2Fv4%2Fd%2Fus-east-1%2Fpro-core.com%2Fcompanies%2F140824359949265%2F01J2Y4WQ1QPTZTR1PK1VWSHGHS%3Fsig%3D73829e44092d245e30f8a4256848555de61391bdd4482648aacc73deed55cf9a&data=05%7C02%7CTodd.Farr%40ramboll.com%7C6fe6dbaccca5407a872f08dca5b4413c%7Cc8823c91be814f89b0246c3dd789c106%7C0%7C0%7C638567440853254264%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=4uZWMf1o4lVCYvu6MVqi1sMIsQQNZ6YbYhiqbULtQ0o%3D&reserved=0 VHANYNChavaS Cross-Out cement lined ductile iron flanged fitting (125 PSI). Please clarify that the valves are not intended to be cement lined. In addition, provide us what class the ductile iron piping shall be.

Refer to spec section 22 05 23 and other specs.

1. Drawing PD-101 Tank Cleaning Items 7 & 8: Please provide the following information:

2. A photo of the tank inside structure and entry access or a reference drawing.

Contractor to verify/review and take photo during prebid walkthru.

3. How much water is left in the tank that needs to be drained and discharged into the grassy area? Contractor to verify/review and take photo during prebid walkthru.

4. How much loose debris is expected to be generated (Cubit Yards) ? Contractor to estimate.

5. In lieu of brushing the wall, could a pressure washer spray system be used? Yes, that would be acceptable.

1. Contract duration is 300 ccd. Per manufacturers, the drawing submittals take 8-10 weeks and the pump fabrications and controls take 40 weeks after approval. Assuming approval is given on the 1st round, the shipment will be made to the site almost 380 days later figuring one month of review time. We require minimum six months for demolition, installation, start up and testing after receiving shipment. Please revise the time duration to a reasonable time frame of 560 ccd.

VA to follow up with response.

1. Could you please add Floor elevations for each level inside the station with building dimensions?

Refer to drawings. Drawings are to scale with scale listed. Architectural drawings list floor, shallow pipe trench, and deep pipe trench elevations.

ore details: View online

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Project Title: Replace Pump Station and Controls (SA) – RFI’s

1) Spec section 01 00 00, para 1.12 states PROFESSIONAL SURVEYING SERVICES. Please confirm this must be hired and paid by contractor. Yes.

2) Spec section 01 00 00, page 17 states A joint 4 month and 9 month warranty inspection will be conducted, please confirm this is required and what is the correct warranty period.

VA to follow up with response.

3) Spec section 01 00 00, pages 30 and 31 states for construction sign and safety sign. Please confirm these are required. Yes.

4) Please confirm all the project work can ne performed during regular work hours. VA to follow up with response.

5) Drawing 6 of 26 Site Demolition plan has a black dots RBS. – please explain what are these symbols and is this a new construction? Site Symbols on drawing 5 of 26 doesn’t show these dots. Please clarify in details. What does RBS stand for? RBS - is a code for Survey, no demolition or new construction associated with item.

6) Drawing 7 of 26 shows ( 4 ) phases. What is the meaning of dotted area? It says “Closed”. –

Please clarify. Dotted hatch pattern depicts suggested roadway closure during the phase.7) Drawing 7 of 26 has the following:

Please clarify what does this S line represent? Is this a new work? This is not shown under the Site Symbols. Refer to sheet C-001 under site symbols and CU-100 PLAN NOTE #1.

8) Please confirm the new piping material is ductile iron pipe? Refer to specs and dwgs.

9) Spec section 01 45 00, para 3.4 has extensive requirements for quality control personnel and manager. Please confirm our site superintendent can simultaneously perform this duty as well. VA to follow up with response.

10) Section 01 91 00 states general commissioning requirements. Please confirm VA will hire and pay for the required commissioning agent. VA to follow up with response.

11) Section 01 45 35 Special Inspections para 1.3 states to be performed by independent third party.

Please clarify if VA will hire and pay for his services and which inspections will be done?

VA to follow up with response.

12) Please refer to Tank cleaning and Disinfection SOW on drawing 13 of 26, note nos. 6 and 11 states to drain the remaining water and also drain during and after the cleaning process. Please confirm all this water can be drained to the adjacent grassy area. Refer to general note 4B on Sheet PD-101, the water should be directed to nearest storm sewer not ground.

13) Tank cleaning and Disinfection SOW on drawing 13 of 26, note no. 7 states remove all of the accumulated debris from the tank. Please advise if there are any existing debris inside the tank, if yes then how much is the quantity.

VA to follow up with response.

14) Please confirm there is no technical spec section (in the spec book) for the work of DDC controls.

VA to follow up with response.

15) Spec section 01 35 26 para 1.9B states CSP to conduct a monthly site safety inspection. Please advise if this mandatory. VA to follow up with response.

16) As there is lot of below grade and excavation work for manholes, concrete encased conduits can agency please provide a geotechnical report. VA to follow up with response.

17) Drawing title sheet states name of the asbestos abatement consultant. Please confirm there is no work of asbestos abatement in this project. VA stated during design no asbestos in our area of work. VA to provide existing asbestos survey reports.

18) Please confirm drawings supersede specifications and documents as there is somewhat different scope in drawings versus specifications and attachment 1 IFC design analysis.

Specs take preference on SOW then the drawings.

19) There is a spec section for Maintenance of Masonry. No work shown on drawings. Please identify on drawings locations and scope of this maintenance of masonry work.

Refer to drawings for penetrations.

20) There is a spec section for Painting. No work shown on drawings. Please advise what is the scope of the painting work and identify on drawings. Is any painting work required for new piping, existing walls and ceilings of pump station? please clarify in detail.

Paint new guardrails, gates, and railings, and as required after demolition patching.

21) There is a spec section for Signage. No work shown on drawings. Please advise what is the scope of the Signage work and identify on drawings. Refer to AS-100.

22) Spec section 31 20 11 page 9, para 3.2B and drawing 5 of 26 site note # 70 states The Contractor is required to hire a New York State Professional Geotechnical Engineer to provide inspection of excavations and soil/groundwater conditions throughout construction. – Please confirm it is mandatory to hire this geotechnical engineer as contractor will have to hire an independent geotechnical engineer. VA to follow up with response.

23) There is a spec section for Dewatering. Please advise of the elevation level of ground water table and if possible, provide boring logs at the locations of electrical manholes and concrete encased conduits. VA to follow up with response.

24) Drawing 2 of 26 Legend and ground floor plan indicate Dust Control Barrier. Please provide detailed section drawing of this barrier. Is this a sheetrock wall construction? Height should be from floor to ceiling deck? Please clarify in detail. Also specify the height of ground floor of pumps station from floor to ceiling deck. Provide zip wall or other approved plastic dust control barrier system, complete with all required mounting poles, foam seals, zipper entrance doors, etc. seal entire perimeter at walls, ceiling, and floor.

25) Drawing 4 of 26 shows three ( 3 ) steel pipe self-closing security gates. Is there a basis of design?

Can agency specify manufacturer, style, etc.? No basis-of-design. Fabricate from steel pipe and self-closing hinges as specified in 05 50 00.

26) Drawing 8 of 26 detail 4 for asphalt pavement indicates 12” subbase course. --- Please clarify if this is a existing or new subbase course. New subbase course.

27) Drawing 8 of 26 detail 6 typical conduit trench detail indicates select granular backfill. – Please clarify if existing granular backfill can be used or contractor has to import new granular backfill material. New select granular backfill, refer to specifications.

28) There is no spec section for the precast electric manhole. Does contractor have to follow only the notes on drawing detail 7/CU-010? Please confirm. Refer to spec section 26 05 41 and other specs.

29) Drawing 10 of 26/CU-100 plan note # 1indicates the length of concrete encased conduit, this length is almost 600 linear feet. For restoration cost please advise how much length is in asphalt pavement, concrete pavement and grass area. Contractor to estimate from drawings and prebid.

30) Drawing CU-101, detail 6 states to restore the conduit trench area with pavement of top soil. Please clarify if the top soil will be new or existing and if new then what is the thickness.

Detail is on CU-010, Refer to specification 31 20 11. Refer to detail 6/CU-010 Note #5.

31) Please provide the interior tank dimensions of the 150,000-gallon ground water storage tank so that contractor can figure out the access and working procedures for cleaning and disinfection.

Approximately 60-ft diameter.