1-Q&As_Spreadsheet.pdf

No. Date of Question

Question Response Response Issued

1 4/17/2019 Key Note #1 on sheet A1 indicates that the existing topping slab and the existing structural slab are to be removed. Is there an existing structural slab, or is it just sand bedding below? Please provide the thickness of both existing slabs.

How are these slabs currently attached to the existing structure?

Our understanding is that there is just 1 slab, but it is thicker than a modern topping slab in some areas (2-4 inches overall thickness). Reference photos from previous, sample demolition activities are attached. The existing slab does not appear to be reinforced or attached to the existing structure.

5/10/2019

2 4/17/2019 Please provide span and loading requirements for the “(N) Concrete Structural Slab.” Is this slab intended to span between the existing casemate arches (19ft oc) and support all roof gravity and lateral loads?

Normal foot traffic loading. Slab needs to support normal pedestrian traffic but does not need to support any other loads – this is basically a slab on grade, but the grade is existing dirt fill on top of the Fort. It can rest directly on the existing Fort structure. There is no minimum or maximum span – contractor to design and pour in reasonable sections based on access and proposed schedule.

5/10/2019

3 4/17/2019 Plans indicate to assume the “(N) Concrete Structural Slab” is 4” thick and conventionally reinforced. Please note that ACI 318-14 7.3.1.1 specifies that the minimum thickness of a conventionally reinforced one-way slab w/ both ends continuous is L/28. Please confirm that the span conditions of the “(N) 4” Concrete Structural Slab” shown in the contract documents will meet the minimum thickness criteria of ACI 318-14.

Note that this is structurally similar to a slab on grade, not a one-way slab. Contractor to provide engineer to design reinforcement, proposed spans and control joints, and stamped final design. All work shall meet ACI standards.

5/10/2019

4 4/17/2019 If the “(N) Concrete Structural Slab” is significantly thicker than the (E) Concrete Structural Slab OR sand bedding that it is replacing, then the additional mass of the new slab could exceed both the 5% (gravity) and 10% (lateral) limits of Sections 807.4 and 807.5 of the 2016 CEBC. This could trigger both gravity and lateral upgrades of (E) structural elements throughout the building OR could require a light weight mix design with light weight aggregate (if so, this could significantly increase the price of concrete). Please confirm that any such mandatory gravity and lateral upgrades per the 2016 CEBC would not be required, or are outside of the scope of this contract. Also, please confirm that we should be bidding a normal weight mix design or if we need to account for a light weight mix design.

For the purpose of bidding, assume no mandatory gravity or lateral upgrades will be required. Assume normal weight aggregate. Note that the applicable code for this project is the 2009 IBC.

5/10/2019

5 4/17/2019 During the walk through the architect of record mentioned no mortar is to be removed before and or during the repointing. It was also mentioned that there could be discrepancies between iterations of the spec documents.

Section 04 11 00, Section 3.5 of the project specs dictates requirements for mortar removal. There is also mention of mortar removal in CLIN definitions. Is the contractor required to remove mortar per specs or will there be no mortar removal as discussed on the pre bid?

The design intent is that intact mortar is to remain in place.

No repointing is to occur where existing mortar is flush with the brick face. This is not a 100% repointing project. There will, however, be areas where there are remnants of deteriorated mortar, which will need to be cleared to a depth appropriate for repointing. See attached reference photograph.

6 4/17/2019 Will the contractor be permitted to stage any equipment, scaffolding, materials, etc. within the interior of the structure (in 2nd-3rd floor casemates or on 1st floor parade area) on non-working days - assuming appropriate barricades are placed to protect the public?

The second and third level casemates are within the contractor's work area during the project and may be closed to the public at the contractor's discretion. The Parade and first level casemates are open to the public when the Fort is open. The contractor can occupy the parade for scaffolding to do their work on the parade facing casemate walls. It is not the intent of this contract for the contractor to stage or store material on the parade when the Fort is open. Temporary staging of equipment and material on the Parade is subject to the contracting officer's approval

5/10/2019

7 4/17/2019 Can the NPS provide copies of any/all hazardous materials test reports?

See attached Hazmat Repport from 2011 of the soil conditions from a previous project.

5/10/2019

8 4/17/2019 What are the NPS preliminary expectations of duration of period between award and precon for preparation of DIV 01 submittals?

Division 01 submittls are required prior to notice-to-proceed.

5/10/2019

9 4/17/2019 Where is the current water service located? Section 01 50 00 says contractor is permitted to utilize existing water utility without metering and without charge. Section 01 31 00, part 1.9 B mentions a new potential water meter permit. Please advise.

There is a fire hydrant located across from the sallyport at the base of the bluff. The contractor shall coordinate for the use of water with the Water Utility, the Presidio Trust.

The contractor shall be responsible for all costs incurred.

5/10/2019

10 4/17/2019 Where is current electric service located? For reference only, the electrical service is located in the room just to the west of the sallyport. The following statement should be in the Summary of the Work. There is inadequate power at the fort to support construction operations. The contractor is responsible for providing all power for construction.

5/10/2019

11 5/2/2019 Please confirm that all of the work shown on Drawing Sheets A6 is to be included in the CLIN #1 portion of the bid?

Yes, all work on A6 is included in CLIN 1. 5/10/2019

12 5/2/2019 The Cleaning Scope as Described in Specification Sections 012700 & 040120 includes both "biological growth cleaning” & “general masonry cleaning”. However, the “Contract Price Schedule” and Spec Section 012700 seem to only include the quantity of cleaning for the “biological growth cleaning”. For example, the west elevation portion of the project is approximately 3,600 sf of wall (which would require “General Masonry Cleaning” but only 675 sf of cleaning is called out for the entire Contract Line Item No. 1.

Please clarify where we are to include the price for the “General Masonry Cleaning” on the Contract Price Schedule?

Bid to include general masonry cleaning only in quantities listed in 01 27 00, at locations identified as containing biological growth on drawings. No overall cleaning of building is in project beyond post-repointing general clean-up specified in 04 11 00 3.9

5/10/2019

13 5/2/2019 Please identify the various “biological contaminants” we will be cleaning from the facade? Namely, what algae are present and are they toxic in any way?

Identified species are green algae Protococcus (Chlorococcum) , orange algae Trentopholia aurea , and yellow lichen Xanthoria parietina . See attached report for detailed descriptions of each.

5/10/2019

14 5/2/2019 It appears as though there is a duplication of the Third Tier Interior walls (Casemates), piers & ceilings in Contract Line Item 1 and Contract Line Item 5. Please confirm this is intentional or which CLIN the Third Tier Interior Walls (Casemates) should be included in?

Third Tier Interior Casemates are to be included in CLIN 5. 5/10/2019

15 5/2/2019 Please confirm the “high tide line” in relation to the bottom of brick portion of the exterior wall? How far above or below is the “high tide line”?

Finish Floor Elevation: +17.1 feet; Base Flood Elevation:

+16 feet; Mean High High Tide Elevation: +5.92'; Mean Sea Level: +3.2'; Mean Lowest Low Elevation: 0.00. Taken from Gauge House at .71 Mile from Fort Point.

16 5/2/2019 Solicitation Page 17 Section 52.211-18 Variation in Estimated Quantity (APR 1984) states the following: Please confirm that in the event that the quantity of a work item increases/decreases by a percentage in excess of +/- 15%, for example 25%, then the cost/time change shall only be reflective of the add’l 10% over the 15% allowable variation?

Confirmed. 5/10/2019

18 5/2/2019 Please confirm that Detail 1/A9 applies to both the East & West bastion, not just the East Bastion as the title of the drawing states.

Confirmed. 5/10/2019

19 5/2/2019 Please confirm that detail 2/A10 does not apply to the “weepers” as shown in detail 4/A10 as the drawing title suggests?

Confirmed. Detail 2/A10 should be labelled " Detail at Parade Wall".

5/10/2019

20 5/2/2019 Detail 1/A10 shows a backer-rod at the edge interface of the structural slab and topping slab but the close-up detail (5/A10) does not. Please confirm which detail is correct?

The same issue exists between details 3/A10 and 6/A10.

Which of these details applies?

Sealant and backer rod are labelled in both larger and close-up details at edge interface. Include backer-rod as shown.

5/10/2019

21 5/2/2019 Is it acceptable to walk on the exposed sand below the existing concrete deck once the concrete is removed?

Yes. 5/10/2019

22 5/2/2019 Are the concrete areas noted in the attachments to be included in the concrete slab scope (See attached marked-up photo & drawing)?

No. All raised concrete gun emplacement bases are to remain undisturbed.

5/10/2019

23 5/6/2019 In the solicitation page 150 of 167, paragraph d, Sub-Factor D for Past Performance states that "Forms shall be submitted with the prime contractor's proposal". Please confirm this means that all Past Performance Questionnaires do not return directly to NPS contracting officer? It is stated on the PPQ form that completed PPQ's are to be returned to the NPS contracting officer. Please clarify this discrepancy

Due to the conflict, the Government will accept submissions either way. Offerors must assure Points of Contact information is accurate. See Amendment #4.

24 5/6/2019 Volume 1 Technical RFP contains blank PPQ forms to submit to past clients for them to complete the evaluation and return the fully completed form to be submitted to NPS with the RFP. If we have prior PPQ forms identical to this form, from prior NPS projects for which we submitted a proposal, is it permitted to submit the form completed by our client from the previous project on this RFP for Fort Point rather than request them to complete the same PPQ again? To clarify if permitted, this would mean the PPQ forms would dated prior to this project.

Due to the conflict, the Government will accept submissions either way. Offerors must assure Points of Contact information is accurate. See Amendment #4.

5/10/2019

25 5/6/2019 Section 013513.22 states requirements for working in archeological sensitive areas. Please designate all archeologically sensitive areas on the site and/or structure?

Barbette tier is archeologically-sensitive and Contractor is to notify CO prior to ground-breaking work in that area per 01 35 13.22

5/10/2019

26 5/6/2019 Who is responsible for paying for services, expenses of the archeological monitor?

Any monitoring will be NPS employees. 5/10/2019

27 5/6/2019 Scaffold is required to access all areas of the structure for execution of the work. A draft concept scaffold plan is requested for the RFP response. No reference is found in the solicitation documents for scaffold to be enclosed with scrim. However, it must be assumed scrim will be needed to protect new tuckpointing from wind and sun exposure for proper cure. Until scaffold engineered plans and calculations are performed for stamped engineered plans, wind forces acting on the scaffold structure are not known. It cannot be assumed that a free-standing scaffold wrapped in full scrim can withstand wind forces acting on it.

Understanding this requirement, please state any limitations or special instructions in attaching to or bracing against the brick structure for support of scaffold if and as needed realizing that scrim covered scaffold increases required strength to resist wind forces.

As at any historic brick structure, install any connections to the masonry at mortar joints or other locations of repair using non-expansive fasteners. Do not cause damage to existing, intact brick masonry.

5/10/2019

28 5/6/2019 Scaffold will require attachment of anchorage and bracing into masonry regardless of scrim.

Scrim will increase the quantity and strength requirements for each anchor location. Please clarify any limitations or special instructions on anchorage into the masonry regardless of the use of scrim or not.

See previous response. 5/10/2019

5/6/2019 No provisions are included in solicitation documents on design requirements of scaffold erected to access the structure. For determining wind forces on the temporary scaffold structure, please clarify design requirements per ASCE standards; and if any reductions per ASCE 37 in wind forces are permitted on the basis of the scaffold being a temporary structure.

No special provisions. Follow requirements of authorities having jurisdiction on federal government property.

5/10/2019

5/6/2019 Are there any provisions required to make scaffold around the site anti-climb by installation of plywood or similar 12-16' tall on the face of the scaffold?

No specific provisions. The contractor is responsible to keep their work site secure. At low tide, the Fort can be approached from the beach to the southwest.

5/10/2019

5/6/2019 Are there any specific security requirements for maintaining the site not identified in the solicitation documents?

See Revised summary of work 5/10/2019

5/6/2019 . There are security cameras in position to monitor perimeter around the fort structure. When scaffold is erected, the scaffold may obstruct view of the existing cameras. In such instances does the contractor have any responsibility for temporary movement of cameras, placement to temporary cameras to provide view for monitoring of the area?

The Golden Gate Bridge District is responsible for relocating their cameras. The contractor will cooperate with the Bridge District should they wish to temporarily mount the camera on the scaffolding. All mounting costs are the responsibility of the Bridge District. Provide a minimum of 5 working days or 7 calendar days not counting holidays notice of when camera will need to be relocated.

5/10/2019

5/6/2019 Please confirm thickness of existing concrete slab to be removed for replacement with structural slab and topping slab?

See line 1 above. 5/10/2019

5/6/2019 Are there any limitations or restrictions on wet cutting of the concrete slab to be removed?

No. 5/10/2019

5/6/2019 Section 011100 states that work hours are M-F 7:00 a.m. to 5:00 p.m.. At the site visit it was discussed that the fort is open to the public on Friday, Saturday and Sunday and that the contractor may not want to work Friday. Please designate all firm and formal restrictions on the contractor work week that will impact ability of the contractor to complete the work. Is it possible that weekend will be regularly approved for work if necessary to maintain schedule for the project?

See Revised summary of work 5/10/2019

5/6/2019 The main gate at the entrance is capable of being closed and locked to prevent vehicular traffic to the site. What agency has control of that gate?

What time frames or days is the gate regularly closed? Will the contractor ever be limited to vehicular access to site by this gate being closed? Who must the contractor coordinate with if the gate is closed and the contractor requires access to site?

See Revised summary of work 5/10/2019

5/6/2019 Staging plan does not designate a loading/unloading zone for semi-tractor trailer or other deliveries to site. Please designate/clarify a loading/unloading zone for all deliveries and pickups considering there will be substantial space needed to receive and offload and loading of semi-tractor trailers for scaffold and other equipment/materials.

Staging areas are designated on the drawings. Temporary blocking of parking and drives must be cleared 5 working days in advance with the Contracting Officer. The contractor is responsible for all traffic control, signage and safety barriers. The exterior of the Fort is to remain open to the public.

5/6/2019 Please designate if there are any load limits to existing access road or parking areas for delivery of equipment via semi-tractor trailer or operation of heavy equipment in the parking lot, staging area or around the project site?

The park has no load limits on its roads at the Fort. The contractor must confirm with the surrounding jurisdictions (Presidio Trust, City and County of San Francisco, Golden Gate Bridge District, Caltrans) if they have any load or size limits on the routes selected to get equipment and materials to and from the site. The contractor is also responsible for confirming the suitability of the size of the equipment being delivered to the site against the size, layout and grade of the surrounding roads.

5/10/2019

5/6/2019 Please designate acceptable staging locations for concrete truck and pump truck during concrete placement operations.

The contractor's staging areas have been designated on the drawings. How the contractor organizes and utilizes those spaces are "means and methods". Temporary blocking of parking and drives must be cleared 5 working days in advance with the Contracting Officer. The contractor is responsible for all traffic control, signage and safety barriers. The exterior of the Fort is to remain open to the public.

5/10/2019

5/6/2019 Please designate acceptable locations for concrete truck clean out.

This not allowed in the Park 5/10/2019

5/6/2019 If NPS has specific criteria for a concrete truck clean out station, please provide description and detail as needed to properly express requirement to contractor

This is not allowed in the Park 5/10/2019

5/6/2019 Please designate acceptable locations for dumpsters to be located on the project realizing there will be a need for regular pickup requiring turn around space for the truck making the dumpster exchanges?

This must occur in the contractor's staging areas. 5/10/2019

5/6/2019 Please designate available electrical access by location and size for contractor to tie into to provide temporary electric to the site?

The contractor must provide their own power to the site.

See Revised Summary of Work

5/6/2019 . What size temporary electric service is available to the contractor to tie into for temporary electric for the project?

The contractor must provide their own power to the site.

See Revised Summary of Work

5/10/2019

5/6/2019 Please designate available sources of water for the project? See the Revised Summary of Work 5/10/2019

5/6/2019 Section 013523 describes requirements of safety for the project. Can the Site Safety Supervisor perform other duties on the project?

Offeror should follow instructions in Section L of the solicitation.

5/10/2019

5/6/2019 For Sub-Factor D Past Performance for Volume I technical proposal please state how many contracts should be submitted and if any year restriction applies to selected projects?

Offeror should follow instructions in Section L of the solicitation.

5/10/2019

5/6/2019 Masonry cleaning spec states to use CSP Bio-Cleaner (MasonRe B+), as manufactured by Cathedral Stone Products. Have trial sample cleanings been conducted with this cleaning agent to determine effectiveness? If so please provide report with such information.

Cleaning tests have been conducted. Bid the processes and requirements described in 04 01 20.

5/10/2019

5/6/2019 If trial cleaning samples with CSP Bio-Cleaner (MasonRe B+), as manufactured by Cathedral Stone Products have been conducted, has any lab testing of the runoff been conducted to determine suitability of disposing the runoff into storm sewers, or to know if the runoff will require treatment prior to disposal. If so, please provide report with such information.

Follow manufacturer's recommendations (which in this case include reclaiming of all waste and residue for treatment prior to disposal). Actual composition of runoff will dictate disposal requirements and Contractor's means and methods (such as water volume) provide some control over that composition.

5/10/2019

5/6/2019 Is cleaning of masonry surfaces limited to exclusive use of CSP Bio-Cleaner (MasonRe B+), as manufactured by Cathedral Stone Products, or will NPS consider use of alternate cleaning agents?

Alternate cleaning agents will be considered during the mock-up process. Bid the specified products and processes.

5/6/2019 It was stated at the site visit that designated unit quantities for tuckpointing and cleaning in the bid documents and solicitation documents will be applied by the design team in an inspection process following NTP and erection of scaffold to provide full access to structure elevations. Please describe this process more completely and how areas will be surveyed, selected for treatment and documented by the design team in coordination with the contractor such that all wall areas are clearly marked and documented in a manner that is trackable so that there are no discrepancies later in the process and NPS has assurance that all SF quantities of tuckpointing and cleaning work are properly applied and executed over the given wall areas. Without a detailed plan in advance of how to survey entire façade areas for application of the tuckpointing and cleaning quantities and designation of roles and responsibilities of the contractor and design team and how both will collaborate on this process, the work required for this effort may become a type of "log jam" in the process and negatively impact the project schedule at no blame to the contractor because no plan was laid out in advance of the project. Please provide clear direction and roles and responsibilities of all parties for detailed survey of the structure for application of unit quantities of work.

After Contractor has provided access to full wall areas, a pre-installation conference will be held to confirm that all parties are in agreement with locations of work. Agreed upon locations will be physically marked with chalk and/or tape. If a "log jam" caused by the process creates project delays, then the project schedule will be extended accordingly.

5/10/2019

5/6/2019 It is not directly stated in the documents that full scaffold erection is required for access to all elevations of the structure. Please confirm if full scaffold erection at all elevations is required by the contractor?

Access to the work is the Contractor's means and methods. 5/10/2019

5/6/2019 The west elevation facing the ocean seawall has considerable sand against the building. Sand does not provide a sound bearing surface for erection of scaffold.

What measures are acceptable to NPS for the contractor to provide adequate bearing surfaces for erection of scaffold?

Does NPS account for the cost of this complicating factor in the cost of the project?

Contractor's bid price to include their proposed means and methods for accessing the areas of work. If that includes a scaffold, provide a safe scaffold for the site conditions.

5/10/2019

5/6/2019 Are other forms of access to wall elevations besides rigid scaffold (tube & lock, frame or universal type) permitted for use on this project? Or is rigid scaffold required?

Access to the work is the Contractor's means and methods. 5/10/2019

5/6/2019 Has there been a hazardous material survey conducted for the building to know if any hazardous materials are present that the contractor may encounter?

See attached report of soil testing at Barbette tier. 5/10/2019

5/6/2019 In reference to the unit prices contained in the price schedule, the unit prices are described to be multiplied by the quantity for each unit price item to equal the extended price. It was described in the site visit that unit prices for additional work are not intended to be the same unit prices as those noted in the price schedule. Please clarify intent and function of the unit prices and how they apply to the price schedule and will be used to modify applied quantities of work on the project.?

The unit prices to be filled out on the Contract Price Schedule must include all costs to complete the work per each CLIN, including mobilization, demobilization, general conditions, protection, access, etc. The additional unit prices requested per section 01 22 00 would be additive to the contracted project work, so mobilization, general conditions, access, etc would already be provided. The additional unit prices therefore only need to include labor and materials to perform additional repointing, cleaning, or repair beyond the quantities identified in the documents.

5/10/2019

5/6/2019 Is there a separate bid form for unit prices described in section 012200?

No form. Please provide with price proposal submission package.

5/6/2019 Question on configuration of Base Bid quantities & Bid Option quantities - Contract Price Schedule contains specific unit quantities of work for tuckpointing, masonry cleaning and brick replacement for both Base Price and Options A, B & C. Those unit quantities are not reflected in the Unit Price spec section 012200. Is that intentional? Scope of work shown on the plan sheets is in percentages of area, such as shown on Sheet A6 where repointing is designated in percentage of wall area. This condition of inconsistent representation of quantities of work between the Contract Price Schedule, spec and plans is typical throughout the documents. Please clarify which quantities of work rule and clarify any discrepancies.

See description 2 lines above discussing unit prices. The Contract Price Schedule is to be filled out per 01 27 00.

Section 01 22 00 is only for pricing of unit price work on top of the base contract quantities.

5/10/2019

5/6/2019 Please confirm if CLIN's 1B, 1C, & 1D are for areas of the West Bastion shown sheet A6?

All work on A6 is in CLIN 1. CLIN 1 also includes work shown on A1, A1.1, A2, and A7.

5/10/2019

5/6/2019 Please confirm if Sheet A7 applies to CLIN's 2A? Individual notes on A7 clarify which CLIN applies (there is work in CLIN 1 and CLIN 2 on sheet A7).

5/10/2019

5/6/2019 Please confirm total unit quantities for work on CLIN 1B, 1C, 1D apply to notes for repointing at parapet walls on sheet A1.1 and all wall areas on the west bastion as shown on sheet A6? Meaning 9,644 SF of repointing will be divided between all parapet wall areas and all west bastion walls – Please confirm?

All quantities have been totalled; so yes, the 9644 will be divided between the locations shown on A6 and A7.

5/10/2019

5/6/2019 Contract line items designated in spec section 012700 states that brick repointing on Sheet A7 is included in CLIN 1B.

CLIN 2B is also defined to include repointing work on Sheet A7. Please clarify.

See individual notes on sheet A7. 5/10/2019

5/6/2019 Key Note 1 on Sheet A1 describes removal of the concrete topping slab and structural concrete slab. At the site visit it was stated that there is no structural slab and that there is only a 2" topping slab over existing fill. It was further discussed at the meeting that existing slab is above the elevation of the granite wall cap at the parade wall side, and that existing fill will have to be removed to facilitate installation of the new 4" structural slab and 2" topping slab that must be flush with the granite wall cap on the parade wall side. There is no section view of existing conditions in the drawings or section view directly showing the conditions described above. Please provide accurate section view drawings depicting the following:

a. Current thickness and placement of existing concrete

b. Current elevation of existing fill

c. Composition of existing fill

d. Amount of fill to be removed to accommodate and prepare for new 4" slab & 2" topping slab to be flush with the granite wall cap stone at the parade wall

See response to first line. Fill will have to be removed to accommodate a new 6 inches of concrete where there is currently only around 2 inches of existing concrete. See attached report describing existing fill and hazardous materials.

5/6/2019 Detail 1/A8 contains a note that states "Sand fill - minimally disturb only as required to install new slab. Please designate amount of fill required to be removed to prepare for installation of new concrete. Further, with removal of fill and disturbance of fill to accomplish this, please clarify if leveling of the fill and compaction is required prior to installation of new concrete structural slab.

a. If compaction is required, please designate desired soil or fill density or rate of compaction required.

b. If compaction is required, please state limitations on compaction methods given the supporting masonry brick arched structure beneath.

Approximately 4" of fill will require removal, after 2" inches of concrete is removed. No compaction; leveling only as necessary to achieve level new slab above.

5/10/2019

5/6/2019 In reference to Plan Key Note #1 on Sheet A1.1, will the concrete slab need to be designed to any special design load, or just California Building Code load requirements?

See responses at top of sheet. Standard foot traffic per IBC. 5/10/2019

5/6/2019 In reference to delegated design of concrete slab, are stamped plans and stamped calculations required? CA-SE or CA-PE stamped?

CA-PE per section 03 30 00. 5/10/2019

5/6/2019 Proposed details show structural slab supported by sand fill, does this condition apply at all locations shown on A1.1? Or are there areas the slab will be sitting directly on brick below and not sand fill? If there are areas where the 4" structural slab will bear directly on brick below please provide all such locations and section details for each.

We believe there is always at least a couple inches of sand fill and/or brick loose-laid in sand, as shown in 1/A8.

5/10/2019

5/6/2019 Who is responsible for design of all waterproofing, drainage, and topping slab?

Waterproofing and drainage per contract documents.

Topping slab per contract documents (03 30 00), to be coordinated with structural slab.

5/6/2019 Will the adequacy of the existing masonry substructure and sand fill to support the proposed 4" structural concrete roof slab system be verified by others? Or is the contractor responsible to verify adequacy of the masonry substructure?

Contractor is not responsible for verification of existing substructure.

5/10/2019

5/6/2019 At the site visit it was discussed that selection of repointing areas or application of the unit quantities of repointing will primarily be focused on mortar joints that are clearly missing or void of sound mortar, implying that extensive mortar removal is not planned or intended for this project.

That concept is not designated in the current plans. The difference between what is stated above and extensive removal of bad mortar to prepare mortar joints for new mortar is a substantial cost difference in labor. Please accurately describe the planned and intended amount of mortar removal that should be assumed for this project by the contractor and accounted for in the bid amount.

See response to line 6 above. 5/10/2019

5/6/2019 Masonry cleaning for the project requires removal of significant amount of biological growth on brick and granite masonry around the structure. Please provide all specie names for the various organic growths to be removed along with information to verify if removal of the growths presents a biological hazard to project workers and if any special protection is required. Please state if an industrial hygienist should be retained for the project to verify safe working conditions for removal of the growth and to monitor work for safe working conditions.

See response to line 14 above. 5/10/2019

5/6/2019 Detail 1/A10 shows that water runoff from the concrete roof slab will runoff the edge of the granite wall cap and cascade down the front of the parade wall at every rain event. Please confirm this detail is correct and no measures are designed, planned or intended for installation of a roof level water drainage system.

Correct. 5/10/2019

5/6/2019 Given the design/build nature of this contract with the delegated design of the 4" structural concrete slab, please consider adding 120-180 calendar days to the project duration to account for site review and engineering requirements that must precede site work for the concrete slab.

Scope requirements were considered in establishing the period of performance.

5/10/2019

5/6/2019 Plan Key Notes on sheet A1.1 refer to details 1/A11 & 2/A11 for install of sealants at various joints. There is no detail for sealant install on sheet A11. The referenced details show photos of typical locations to install sealant. Please provide referenced detail of sealant install.

A11 shows typical existing conditions requiring sealant.

New sealant and backing per section 07 92 00.

5/10/2019

5/6/2019 Please confirm if Plan Key Note 2 on sheet A1.1 for 50% repointing at parapet is above and beyond repointing required in CLIN 1B for 9,644 SF, or is this quantity included in the 9,644 SF.

This quantity is included. Contract Price Schedule unit prices require no take offs by Contractor.

5/10/2019

5/6/2019 If the 50% repointing referenced on Plan Key Note 2 on sheet A1.1 is not included in 1B, please designate if it is included in CLIN 1A.

It is included in 1B. 5/10/2019

5/6/2019 Is all sealant scope referenced on sheet A1.1 in Key Plan notes 3 & 4 included in CLIN 1A?

Yes. 5/10/2019

5/6/2019 2” pipe referenced in details on sheet A10 does not specify type or thickness of pipe. Please provide type of pipe and provide required wall thickness.

Normal drainage grade piping. Nonmetallic pipe preferred. 5/10/2019

5/6/2019 Please refer to detail 1/A8 and note that designates to repoint 10% of mortar joints. Please confirm extent of repointing required for brick on skyward facing areas of the superior slope?

a. Please also clarify to which CLIN’s those quantities of repointing should be allocated.

CLIN 1B includes all quantities. 5/10/2019

5/6/2019 Detail 3/A10 contains a note that states “(E) Brick wall, re-point deteriorated mortar joints”. Please confirm if contractor is responsible for all repointing necessary at entire length of this brick curb at the roof level and to which CLIN this work applies.

CLIN 1B includes all quantities. No additional pointing unless contracted via unit prices for additional pointing.

5/10/2019

5/6/2019 Specification contain reference to a project CMR. Please clarify if NPS will have a full or part time CMR assigned to the project.

Full Time. 5/10/2019

5/6/2019 If there is a CMR assigned to this project, please clarify duties, responsibilities, authorities and limitations on authorities for the project CMR.

The CMR will be the NPS' on-sight field representative. 5/10/2019

5/6/2019 Are there any tunnels or sub-grade structures that would problematic for staging of a crane or concrete pump truck in proximity to the building related to ground bearing pressures? If so, please provide information on locations of those structures.

There are some buried drain lines in the staging area. None of these should be of concern.

5/10/2019

5/6/2019 What are load capacities of the roof structure for placement or usage of equipment for concrete removal or placement of new concrete?

Contractor's PE to assume normal load capacity for unreinforced masonry structure of this age.

5/10/2019

5/6/2019 Are there any requirements to maintain the roof structure in a watertight condition during stages of concrete demolition, forming, rebar placement, pouring of new structural slab and install of new waterproofing membrane?

Or are work areas permitted to be exposed to rain and weather during the above processes?a.If areas of work in progress are to be protected, please designate what level of protection or watertight coverage is required.

No requirements beyond those recommended by Contractor's PE for installation of new structural slab.

5/6/2019 Are there any structures beneath parade ground bearing surfaces that would limit bearing pressures of scaffold or equipment on those ground level surfaces to access wall elevations of the parade ground? Or would bearing pressures be limited for any reason?

There are some existing historical utility trenches and conduit runs. The park used to have a rodman cannon with an iron carriage in the center of the parade before it was moved to the 1st Tier Casemates. No specific limits for bearing pressures are proposed.

5/10/2019

5/6/2019 There are many locations of faulty or deleterious conditions on the gun emplacement brick curbs that will not be watertight without considerable repairs. Please see below photo for example. No repairs are noted in the plans in this location. Please confirm extent of repairs required at all gun emplacement curbs and related structures.

No repairs at gun emplacement curbs. 5/10/2019

5/6/2019 Solicitation technical proposal requirements in Section L state for contractor to provide a detailed plan for removal algal growth and efflorescence from the granite. Spec section 040120 for masonry cleaning provides no information on requirements for removal of efflorescence from brick and granite masonry. Please clarify if efflorescence removal is a requirement of this project and if so please designate acceptable cleaning methods to accomplish such.

No efflorescence removal. 5/10/2019

5/6/2019 Please confirm if the onsite quality control supervisor can also serve as project superintendent?

No 5/10/2019

5/6/2019 Please state if the contractor may be permitted access to sanitary sewer connection on NPS property at Fort Point for disposal of masonry cleaning waste water run-off from the project assuming contractor obtains permit for such rinse water disposal by local waste water authorities?

See Revised summary of work 5/10/2019

5/6/2019 Is the contractor permitted to temporarily barricade an area in the parking lot for crane/concrete pump staging? For maximum efficiency and in order to reach the furthest northwest corner for demo/concrete pour, the truck will need to stage in this location. See attached map of proposed location.

Temporary barricades, with advance notice to the CO, would be permitted.

5/10/2019

5/6/2019 Can the original Bid Bond be sent separately via FedEx – if we include a copy of the bid bond in both the original and electronic copy of the proposal?

Submit with offer. 5/10/2019

5/6/2019 Has the existing waterproofing been tested for hazardous materials?

There is no existing waterproofing. See attached soil test report.

5/10/2019

5/6/2019 5. Has the existing mortar been tested for hazardous materials?

No. 5/10/2019

5/6/2019 6. Has the existing sealant, at sky facing surfaces, been tested for hazardous materials?

No. 5/10/2019

5/6/2019 7. Brick repointing: for billing purposes, how will the NPS calculate the billing quantity?

See Definition of Bid Items included in Specifictions. 5/10/2019

5/7/2019 Some potential subcontractors have applications filed wit the federal gov’t for Minority-Owned Business (MBE) Status, Woman-Owned Business (WBE) Status & Small Business (SBE) Status but their applications have not been reviewed at this time. Do these potential subs qualify to meet the goal for our MBE, WBE and/or SBE subcontracting goal for this project?

Contingent upon the type of certifiction that the subcontractor or supplier has applied for will determine their qualification to count toward the goal. This will be reviewed during consideration of award.

5/10/2019

5/7/2019 Is the Minority Business Enterprise also considered a “Disadvantaged Small Business”?

Yes 5/10/2019

ARG Note: I am attaching the one report I have (of barbette tier soil).

Sheet1