Tab 10 Amendment 004 Attachment RFI Log 2020 05 15.pdf

RFI # Relevant Document Company Question Govt Party Responsible Response

1 Wu & Associates, Inc. Most drawings aside from the civil sheets are not signed and sealed by the designers of record. Are these the final contract drawing sheets for bidding or will there be bid addenda with bubbled changes?

M+Sa, GSA The AE will produce a conformance set at award that incorporates all amendments and RFI responses into a single signed/sealed drawing and specification set. Any pre-bid design changes will be issued via addenda with bubbles and a list of updates.

2 15950 1.3.B Wu & Associates, Inc. Can the role of SSHO be performed by the Quality Control Manager or the Project Superintendent or is this a separate position?

GSA Per part B in cited section (015950 - 1.3 - B) "The SSHO may be an individual with other responsibilities, already identified to be on site and who has the authority and appropriate knowledge to oversee and act on the provisions of this section." Further definition is provided in section 013100 - 1.4 - C: "Safety and Health Officer: Provide a safety and health officer whose duties shall consist of developing and implementing safety and health programs specified in Division 1 Section "Safety and Health."

This designated officer should be on duty full time when work is in progress on site."

3 N/A Wu & Associates, Inc. COVID-19 Impacts. Staffing at supplier and subcontractor offices required for bidding this work is limited at this time due to COVID-19. Can the bid deadline be extended by two weeks to help with this?

GSA GSA extending proposal deadline to 6/5/20, see amendment posted to betasam, RFI deadline extended to 5/22.

4 01 14 00 22 Wu & Associates, Inc. Contract states "Refer to FAR 52.236-7" and E002 general note 2 states to "... obtain permits...". Are any City of Philadelphia or other permits required for this Federal project?

M+SA, GSA Generally no city, state, or local permits are required on interior federal projects. Where impacts to public sidewalk or disturbance of ground are planned please consult with local jurisdiction and state environmental authorities for proper procedure. Contractor shall responsible for all permit application and fees where required.

5 011400 1.1.b.13 Wu & Associates, Inc. Contract states: "Contractors shall remove their trash and construction debris from the building daily; space constraints limit the size of dumpsters allowed. The delivery of dumpsters must be coordinated with Building Management and scheduled 72 hours in advance so as not to interfere with other ongoing construction projects." The project includes a minimum recycling requirement of 50%, which will require multiple dumpsters to achieve. What is the maximum number and size of dumpsters that can be staged on site?

GSA Space usage (storage, trash, staging) within project footprint is perrogotive of contractor. Permanent or long term external dumpsters are not permitted without permission of building management and must be coordinated in advance. A 20 yard dumpster is preferrable, as it will fit in a parking spot. If a 30 yard is necessary, it will need to be coordinated with building management.

6 018000 1.5.B Wu & Associates, Inc. Request that Commissioning Authority (GPI, 52 Glenmaura National Blvd, Suite 302, Scranton, PA 18505) provide a draft project CX Plan. This will permit the General Contractor, Mechanical Contractor, Electrical Contractor, TAB Contractor, Controls Contractor and Plumbing Contractor to understand actual CX scope, interaction with LEED reporting requirements, budget for CX kickoff and subsequent coordination meetings. Also, will CX meetings be via teleconference or require travel to the project site?

AFG The Project (Commissioning Plan) Cx Plan will be uploaded into BetaSAM for all bidders to review. CX meetings can be conducted via teleconference.

NIX USPO Request for Information Log

SOLICITATION 47PD0120R0027

Proposal Due Date 6/5/2020

7 01 73 10 1.4.1., MD107 & M106

Notes 3

Wu & Associates, Inc. Contract states that "All roofing work shall be performed by a contractor certified by the existing roof manufacturer to maintain the existing warranty on the roof. Coordinate with government for roof warranty information." MD106 Notes 14 and 15 reference architectural drawings for roof patching information;

however, there is no architectural roof patching information on the drawings. Please provide the existing roofing warranty and all architectural roof patching details required for pricing and construction.

GSA Drawings and specs for the 2nd Floor Roof project can be provided. A warranty has not been issused yet because the project has not been completed yet.

8 MD107 & M106 Wu & Associates, Inc. Mezzanine Roof-level work. Is there service elevator access to both ends of the mezzanine roof level for mechanical work or will a crane rental and street outage(s) be required to hoist the five condenser units, curbs, piping, etc.?

GSA Please coordinate crane lift with the field office. Most likely will need to be done on a weekend or holiday. The driveway cannot be co blocked off at any time.

9 05 12 00 Wu & Associates, Inc. AISC Certification. Can AISC Certification requirement be waived since it greatly reduces the available fabricator/erector pool?

M+SA, GSA KH (Structural Engineer/Consultant) finds it acceptable to waive the AISC requirement for this project, but the special inspector shall be required to visit the fabrication shop.

10 23 09 23 2.6.E. Wu & Associates, Inc. HVAC Instruments & Controls 23 09 23 2.6.E. states that controls wiring of 30 volts or less is not required to be run within conduit. Please confirm that plenum rated wiring only without conduits is sufficient for low voltage controls wiring.

M+SA Installation of control wiring 30 volts or less does not have to be installed in conduit as long as all of the requirements of 2.6.E & G are maintained.

11 28 31 11 1.4.A Wu & Associates, Inc. Fire alarm system. Description states: "At the time of survey, the existing system was a Siemens FireFinder XLS fire alarm system. A sperate project (by others was underway to replace the head end. The component of this project shall be compatible with the new system." What is the new FAS "head end" model/version and what is the contact information for its service contractor?

GSA Fire panelFCM2041-U2 DESIGO OPERATOR INTERFACE

12 23 20 00 3.2.A Wu & Associates, Inc. Condensate, supply and return piping joint types. 2” dia. and smaller copper piping joints are called to be soldered. This will require extensive hot work. Would compression-type fittings, such as ProPress with 50-year warranties, be acceptable for this application?

M+Sa Yes, Press-seal fittings (test to 130 psig) are acceptable for 2" dia and smaller copper piping joints for condensate, supply and return piping in addition to soldering.

13 N/A Wu & Associates, Inc. Domestic plumbing piping and insulation. Please provide specifications for sanitary, hot and cold water supply piping, fittings and insulation for the domestic plumbing system. Would compression-type fittings, such as ProPress with 50-year warranties, be acceptable for the small dia. (presumably copper) water lines ?

M+Sa Domestic plumbing piping is specified in Section 232000 - Building Services Piping. Domestic piping insulation is Specified in Section 230700

- Mechanical Insulation. Domestic water copper piping shall have lead free soldered fittings per GSA PBS-100 Facilities Standards for the Public Buildings Service. Compression-type fittings are not acceptable.

14 06 40 23 multiple paragraphs but particularly 1.10

Wu & Associates, Inc. AWI certified manufacturers and installers required for casework and trim. The impacts of this are the same as the AISC in that there are some manufacturers and very few installers, and that many won't bid on this sort of project. Can AWI requirement be waived?

M+SA, GSA M+Sa is willing to waive the AWI requirement. GSA concurs with the A/E - M+Sa.

15 015000 1.3.D Wu & Associates, Inc. The specifications require a minimum temperature of 40°F at the working surface. Based on the mechanical engineer's energy modeling, how many supplemental electric heating BTUs would be required to maintain 40°F if all three air handlers, CUHs and FCUs were out of service simultaneously during typical winter months?

Also, is there a maximum temperature limit?

M+Sa This is a performance based requirement for the contractor's means and methods to determine.

16 015950 1.4.A & 3.1.A Wu & Associates, Inc. The specifications list Lead, Asbestos, and PCBs as potential safety hazards and the possibility of required contractor hazmat testing. Have existing to be demolished materials been tested for asbestos (flooring), lead (paint) or PCBs (light fixture ballasts)? If so, please provide the reports. If these materials are suspected and identified during construction will the GSA manage testing and abatement as applicable or require the GC to test and abate? If the GC would be responsible for testing and abatement, what requirements would apply (local/state permits, independent air monitoring, abatement plan submittal, etc.) and how would this be paid for?

M+Sa A hazmat report will be posted to BetaSam.

17 Mechanical drawings Wu & Associates, Inc. Mechanical scope questions:

a) Where is MD-105 key note #2 indicated on sheet?

b) Where is MD-106 key note #13 indicated on sheet?

c) Where is M-103 key note #1 shown for ACU-3 (is this unit located in Room 177?)?

d) M-103 key note #2 - what item is to be connected to the 1.25” dia. drain line in Room 142A since ACU-2 condensate drains elsewhere?

e) Where is M-105 key note #12 indicated on sheet?

f) M-201 - Are condensate drain lines or leak detection cables required for the M-105 key note #14 FCU emergency drip pans? If drain lines are required, must they be insulated?

M+Sa a) Note 2 references the air device near column C-8 that currently referenced by Note 1. The device is actually located in the existing toilet room located just to the south of the existing shown location. The drawing will be revised to show this in the next submission. b) Note 13 is a repeat of Note 12 and will be changed to Not Used in the next submission. c) ACU-3 is located over the door of Room 177. Uint will be tagged and reference note will be added in the next submission. d) Drain is from the fan coil units on the mezzanine. See drawing M-201 for continuation. e) To the right of colums C-17. f) Provide liquid sensor to de-energize unit upon detection of liquid, see Detail on sheet M-502.

18 CS101 Wu & Associates, Inc. Sheet CS101 has notes 'Proposed concrete wall with M+Sa The stone veneer is indicated on the dwg A-704.

19 102219 § 2.2H, 2.2P Wu & Associates, Inc. In the demountable specification section 102219 Part 2 section 2.2 H. calls for 1/2” clear tempered laminated glass. However, section 2.2 P. calls for standard fully tempered clear float glass and double glazing fully tempered clear float glass. Which one is correct, clear tempered or clear laminated?

M+Sa There are four diferent mfrs listed who are capable of providing the glazing system assemblies. Each may have a slightly different way of detailing their systems. Generally 1/2" laminated is the preferred material, but some mfrs may use 1/2" tempered glazing for doors.

20 050170.51 3.7.C.1 , E-802 Note 8

Wu & Associates, Inc. 050170.51 § 3.7.C.1 requires that historic light fixtures be cleaned in the field while Sheet E-802

SPECIFICATIONS FOR RESTORATION OF

HISTORIC LIGHTING FIXTURES note #8 requires these fixtures to be restored by one of four out-of-state companies. Can fixtures be shipped off site for restoration work or must one of the approved restoration companies set up shop on site to clean and re-lamp the fixtures?

M+Sa All historic lighting should be shipped off site for restoration/repair as is common for this type of work. However, if the restorer feels that some work can be performed in the field, the restorer should review proposed procedures with the Architect and GSA prior to starting work.

21 230500 §3.20, E-805 Wu & Associates, Inc. Will any after-hours outages be required for Sheet E- 805 circuit breakers and feeders’ termination work?

Can substations be worked on while energized if electricians utilize proper PPE?

M+Sa An after-hours outage (coordinated and approved by the GSA) of the substation is anticipated when working within the substations. Electrical Contractor is responsible for conducting work in accordance with OSHA regulations and NFPA 70E requirements which do not permit live electrical work for this application. Substations shall be deenergized while performing work on them.

22 260923 §2.3, E402/6 Wu & Associates, Inc. Please confirm that digital lighting control head end controller is by contractor and that nLight model NECY is compatible for integration with existing DDC system.

M+Sa Digital lighting control system headend equipment is by the Contractor as indicated on 2/E701, 1/E701 drawing note 1, and Specification Section 260923. Provide necessary lighting control system components and/or gateways to integrate with existing building automation system. Contractor shall confirm with lighting control manufacturer/vendor/distributor to determine exact component model numbers to provide specified functionality. As described on E701, contractor shall prepare detailed shop drawings indicating all components necessary.

23 E-402 Note 6 Wu & Associates, Inc. Diplomatic security drawings are needed to quantify scope of additional electrical work referenced on E-402 note 6.

M+Sa, DoS Per Dept of State: All Diplomatic Security electrical requirements are listed in pages TY-600 and TY-610

24 E-401 Wu & Associates, Inc. Please confirm which telecom equipment (e.g., patch panels) and wiring and termination work is by tenant versus contractor and what contractors’ installation and testing scope of work is. A matrix of all major telecom equipment items, who supplies, who installs and who tests should reduce commissioning and turnover conflicts.

M+Sa All items/work indicated on E-401 (and all other drawings and related specifications) are work to be provided and performed by the contractor unless specifically otherwise indicated. Refer to Division 27 Specification Sections for more information. Refer to notes on drawings E-003 for additional clarification.

25 ET-102 - special note 5, E003 Paging Requirements

Wu & Associates, Inc. Dashed lines associated with ET-102 special note 5 don't make sense. General note #5 calls for cabling for paging system and references “tenant supplemental drawings”. Sheet E003 PAGING REQUIREMENTS references cables and supports. Please provide supplemental documents and clarify paging system scope of work.

M+Sa "The dashed lines are below-slab conduits in accordance with wiring convention defined on drawing E001. Special Note #5 is pointing to these conduits to define the conduit size.

General note #5 - GSA/DoS needs to provide the paging drawing as part of the bid package to the contractors as DoS did not want Henry Adams putting this information on our drawings."

26 ET-101 Wu & Associates, Inc. Only one conduit route on sheet ET-101 calls for pull strings. Is the contractor to provide telecom and data wiring for all the other conduit banks on this and other data drawings? Terminate in field only, or at data racks ends as well? If all cabling is provided by contractor, can plenum rated cabling without conduits be used above ceilings?

M+Sa For the conduit runs noted to provide pullstrings only, cabling will be provided by the Owner. All other conduits provide pathways for cabling that is to be provided by the Contractor. Read the Special Notes pointing to pull boxes and conduits. Refer to the details indicated in the Special Notes.

Terminate all cabling at both ends.

27 EP-106 Wu & Associates, Inc. Does the six-seat countertop island in Breakroom M102 (between columns H14 and K15) get through-floor stub ups for two outlets for microwave niche in casework or are these fed some other way?

M+Sa Yes, these outlets will need through-floor stub ups.

28 EL-101 note 4, EL- 102 note 5

Wu & Associates, Inc. Surface-mounted exit sign and light fixtures shown mounted to de-mountable partition system mullions @ 9 locations. Can feeder conduits for these fixtures be surface-mounted or must these be snaked through the mullions?

M+Sa Per Electrical Luminaire Schedule, Luminaire Type HE2 is photoluminscent and does not require a power connection. This is the only luminiare type shown mounted to the partitions.

29 ED-104 special note

Wu & Associates, Inc. Sheet calls for removal of column-mounted receptacle at 3 locations. The columns are clad in stone and no new outlets shown at these locations. Is patching with cladding stone required? Is there attic stock cladding stone available on site?

M+Sa Patching is not required. Provide a blank cover plate in accordance with "General Electrical Demolition/Renovation Notes" Note #14 on drawing E002.

30 EP-104, ET-103 Wu & Associates, Inc. Four stone-clad lobby columns at column line B and column lines 13, 14, 15, 16 call for power and data jacks. Are these fed up through the historic terrazzo flooing via poke-throughs and routed via surface mounted conduits to the face of the stone cladding?

Dropped through the plaster ceiling? Cladding removed so that conduits can be concealed? Please provide outlet mounting details.

M+Sa "Power and data wiring for these outlets can be run above the drop ceiling (refer to Drawing A-103B) that aligns with the columns, and then routed through the built-out columns. See plan details on A-515.

This will require the removal of the marble panel on the column behind each monitor in order to channel/core the existing concrete to accommodate conduit and boxes after which the marble panel can be reinstalled."

31 Electrical Wu & Associates, Inc. At existing to remain walls and column faces, can power and data outlets and feeder conduits generally be surface mounted?

M+Sa In general, no they cannot. Devices and raceways can only be surface mounted where recessed mounting and concealed routing is not physically possible due to existing building finishes (such as historic stone). Where

32 All Wu & Associates, Inc. During the NIX USPO Re-Design Pre-Bid Meeting it was stated that certain noisy or odorous work actives would require to be performed off-hours. What are the noise limits for work (e.g., 90dB for five minutes or less)? What smelly work will require off hours work (e.g., soldering copper water lines, painting lobby ceiling, gluing down flooring). Off shift work impacts GC and subcontractor labor costs.

M+Sa, GSA All noise related work willl cease by 8am and may resume after 5pm.

Noise that cannot be heard outside of the space is acceptable.

33 Spec N/A Glidden manufacturer name change M+Sa Paint section 099100 2.1 Change Glidden to PPG Industries.

33 Bid Form item 19 Wu & Associates, Inc. What is the quantity unit for the "ductwork" line item?

SF, LF or other? And, if unit pricing is needed here, is this ductwork: New or existing to be removed? Lined or unlined? Exposed or concealed?

M+Sa Cost per pound of new ductwork, concealed.

34 A103B Wu & Associates, Inc. Where the new beams are being installed along column line B, what is the finish method and attachment method for the finish to the bottom of the beam?

M+Sa See Dtl 3/A-516

35 S1.1.B, 4&5/S2.2 Wu & Associates, Inc. W12x40 installations are shown on column line B in the adjudication area, spanning from column to column. An existing terracotta wall rests on the existing beam to be removed, and so as a result during beam replacement the existing masonry wall will be unsupported over a 24 foot span. Is it the intention in this project to completely dismantle and reconstruct the masonry walls to the second floor deck or to remove the facings and needle supports above the new beam location so as to support the wall during beam replacement?

M+Sa Per 5/S-2.2, the design intent is for the contractor to design & provide temporary support of the existing wall assembly prior to removal of the existing concrete encased beam. Potential shoring options may include: - Needle supports through the wall; -Temporary shoring for the existing window and reconstruction of the terra cotta wall between the window and new steel beam. However, all existing conditions should be field surveyed prior to the completion of any temporary shoring designs.

36 Solicitation § IV.K Wu & Associates, Inc. Please confirm that the Small Business set-aside for this project is met by a Joint Venture only if the JV is approved by an existing SBA approved 8(a) Mentor- Protégé Program.

GSA See updated language in most recent amendment for clarification on joint venture requirements

37 A-704, 015000 §1.5.D & 3.4.E

Wu & Associates, Inc. Turnstile entrances conversion work will be multi trade over multiple days. For temporary security, will a 3/4" plywood and 2x4s barrier set adjacent to the location of future storefront suffice for overnight and weekend protection or are additional security measures required?

M+Sa, GSA It must be secured to prevent entry to the building. 3/4" plywood would suffice, but it must be affixed and prevent entry. We are open to suggestions from the contractor.

38 102219 § 1.7.a.1 Wu & Associates, Inc. Section 102219 § 1.7.a.1 Extra Materials calls to supply a full size unit of each type of demountable partition. Given that the partitions shown on sheets A501 and A502 are of varying sizes, this could mean supplying a duplicate for all installed systems. What is specifically required to be supplied as extra materials for this project?

M+Sa, DoS It is not necessary to provide extra materials.

40 Specs section

05.12.00 Structural

Steel

MJ Settelen Construction, LLCSpecs call for the steel fabricator and erector to be AISC certified. Is this going to be mandatory?

M+Sa See RFI #9 response, pasted below for reference: It acceptable to waive the AISC requirement for this project, but the special inspector shall be required to visit the fabrication shop.

41 Specs section 10.26.00

MJ Settelen Construction, LLCCorner guards: (1) Sheet A-812 Finish Schedule calls for corner guards to be by MOZ. Does this just apply to the square columns in open area 150 as shown on A- 814B?

M+Sa Sheet 814A & B and 815 show all corner guard locations throughout plans. See legend for stainless or plastic.

42 Specs section 10.26.00

MJ Settelen Construction, LLCWhat is required at the 90 degree corners? Some are shown to be plastic & some to be by MOZ. Spec section 102600 & the finish schedule are in conflict.

Which is to be used?

M+Sa, DoS Both are used see sheet 814A, B and 815 and legend.

43 Specs Divisions 26 &

MJ Settelen Construction, LLCWhat is the desired battery runtime for the UPS unit? M+Sa, DoS DoS specified and confirmed (8) hours and manufacturer has to be APC.

44 Specs Divisions 26 &

MJ Settelen Construction, LLCThe specifications for the UPS systems call for racks to house the UPS and battery cabinets. Are these racks supposed to be 4 post open racks or enclosed?

M+Sa, DoS Open Rack is acceptable. DoS prefers in racks like this - see the photo ----https://www.apc.com/shop/us/en/products/APC-Symmetra-LX-12kVA- Scalable-to-16kVA-N-1-Rack-mount-208-240V/P-SYA12K16RMP

The rack would be similar to the one shown.

APC Symmetra LX 12kVA Scalable to 16kVA N+1 Rack-mount, 208/240V

- APC USA

APC Symmetra LX 12kVA Scalable to 16kVA N+1 Rack-mount, 208/240V Highly available single phase UPS features redundant and scalable double-conversion on-line power protection Includes: CD with software, Documentation CD, Installation Guide, Rack Mounting support rails, Temperature Probe, User Manual, Web/SNMP Management Card www.apc.com

45 Specs Division 8 MJ Settelen Construction, LLCOpenings 172A and 174 are aluminum Doors with a HM frames?

M+Sa Door 172A and 174 are sliding glass doors as part of the glazing system assemblies. They do not have HM frames.

46 Specs Division 8 MJ Settelen Construction, LLCWhat are the hardware requirements for openings ST2- 1A, G-1?

M+Sa, DoS These are existing doors with existing hardware. Any changes required to these doors will be handled between the tenant and GSA. For ST2-1A assume 'passage set' (per Dept of State).

47 Specs Division 8 MJ Settelen Construction, LLCOpening 190A Stainless Steel door in aluminum frame , what are the specs for this door?

M+Sa The intent is to salvage one of the existing stainless steel or aluminum clad doors in the Lobby or Credit Union for reuse at this location.

48 Specs Division 8 MJ Settelen Construction, LLCWhat are Type E Doors? M+Sa Type E should be listed as Type NE: existing original entry doors that are to remain.

49 Specs Division 8 MJ Settelen Construction, LLCPlease confirm any ballistic doors/frames? M+Sa The ballistic doors and frames are the ones located in the ballistic glazing system. See BR notation in Misc column.

50 Specs Division 8 MJ Settelen Construction, LLCPlease confirm that M102-1,M102-2 and 145 are sidelight frames.

M+Sa These doors all have sidelites.

51 Specs Division 8 MJ Settelen Construction, LLCHardware Sets Section 080671, that is referenced in the hardware Spec’s on Page 16. Please let me know where I can find them.

M+Sa Delete this reference.

52 Specs Division 8 MJ Settelen Construction, LLCExit Devices, Locksets, Electric Hinges, core are provided by DOS, is that correct?

M+Sa, DoS As noted in the door notes, all locking hardware to be provided and installed by tenant. See also Door Hardware key for additional information on components to be supllied by contractor. Exit Devices, Locksets, Electric Hinges, core are provided by Dept of State as well. Dos has confirmed that this is correct.

53 NA MJ Settelen Construction, LLCCan experience be outside the described list in the RFP, in regards to year or project size?

GSA See updated language in most recent amendment for clarification on prior experience

54 GSA Solicitation No

47PD0120R0027,

Section II.D Technical Proposals and SF1442

Magnum Inc. As this project is a 100% Small Business Set-aside:

Please provide clarifying language ensuring that only the relevant "Prior Experience" and "Past Performance" of the managing partner (i.e. the SBE) of any/all Joint Ventures, Teaming Agreements, Mentor- Protege or other entity type(s) submitting a proposal for this project will be considerd when evaluating Technical Proposals. The use of a Large Business' prior experience/past performance would put a true stand alone Small Business Enterprise at a disadvatage by comparison. As this is a Small Business Set-aside there should be a level playing field for all prospective bidders, not allowing an advantage by use of Large Business' prior/past experience to tip the scales. Since the intent of the Solicitation is to be a 100% Small Business Set aside it is imperative that clarifing language be added to the Solicitation.

GSA For Joint Ventures; projects may be submitted for the Joint Venture as an entity or for individual members of the joint venture. All firms in a Joint Venture arrangement must display prior experience under this factor either as an individual firm or Joint Venture.

55 N.A GSA Please confirm that there is no general or architectural demolition work at the basement level.

M+Sa The new lift and the exterior ramp construction will require basement access during demolition to complete the modifications, as well as to protect the basement materials and equipment.

56 224000 § 2.1.E Wu & Associates, Inc. P-304 and P-305 Lavatories feature electronic faucets that require AC power. What panels and circuits are these faucets fed from? (It might be logical to switch to a battery powered model.)

M+Sa Battery powered plumbing fixtures are not acceptable. 120-Volt circuits for these fixtures will be provided in forthcoming addendum. These circuits will originate from the applicable "L1_" panel in the corresponding electrical closet/room for the area as identified on the circuit zoning keyplan on E004.

57 P101/102, M101 Wu & Associates, Inc. Please provide basement level P101/102 and P401/1 plumbing work area photos. Are there any obstructions to work from a ladder such as casework or FF&E?

GSA We will now be providing site tours that should address this, additional photos to be provided if still necessary

58 P102 Wu & Associates, Inc. Are the water lines shown without diameters indicated near column C15 existing to remain?

M+Sa The water line shown in the basement near column C15 are existing to remain.

59 220800 § 3.2.B Wu & Associates, Inc. Plumbing Systems Commissioning spec section 220800 references items not indicated on the plumbing drawings including Automatic Temperature Controls, Domestic Hot Water Pumps, Mixing Valves, Thermometers, and Water Heater but not electronic faucets, water coolers or bottle fillers that are in scope.

Is this CX spec applicable to this project?

AFG/GPI As per specification section PLUMBING SYSTEMS COMMISSIONING 220800 paragraph 1.3 the domestic hot water system and the water fountains shall be commissioned.

The domestic hot water system shall include:

* Hot water recirculation balancing valves

* Lavatory and sink faucets

* Mop service basin faucet

* Shower The water fountains shall include:

* Water coolers

* Drinking fountain60 A402 detail 7 Wu & Associates, Inc. Sheet A402 detail 7 shows a 3" terrazzo tile to be used for base, while the finish schedule for base on sheet A813 calls for the use of a poured terrazzo base. Is 3" height terrazzo tile to be used for base or is an integral base poured to the floor to be used?

M+Sa The new base should be terrazzo tile to match the new floor.

61 A810 Wu & Associates, Inc. Sheet A810 calls for the existing terrazzo to remain to patched in rooms 120, 121, 122, 123, 124, and 125. It is not clear from drawing AD-101B that existing terrazzo flooring extends to the full limits of those rooms. Does the existing terrazzo extend to the full extent of those rooms, and if not, what is required in those areas of those rooms where there is no terrazzo?

M+Sa There is existing terrazzo in the former public mailbox alcove and in the service area behind on three sides. It is unknown if the terrazzo continues under the existing mailboxes and writing table(s).