Amendment_5.pdf

(x)

33330218RF0010034

x x copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted ; or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGEMENT TO BE RECEIVED AT

THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted , such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

x

OCON

Washington DC 20013-7012

MRC 1200

P.O. BOX 37012

OCON

OCON

Washington DC 20013-7012

MRC 1200

P.O. BOX 37012

SMITHSONIAN INSTITUTION

093310105/01/20180005

13. THIS ITEM ONLY APPLIES TO MODIFICATION OF CONTRACTS/ORDERS. IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

12. ACCOUNTING AND APPROPRIATION DATA (If required) is not extended.is extended, Items 8 and 15, and returning

Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended , by one of the following methods: (a) By completing

The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

FACILITY CODE CODE

10B. DATED (SEE ITEM 13)

10A. MODIFICATION OF CONTRACT/ORDER NO.

9B. DATED (SEE ITEM 11)

9A. AMENDMENT OF SOLICITATION NO.

CODE

8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State and ZIP Code)

7. ADMINISTERED BY (If other than Item 6)CODE 6. ISSUED BY

PAGE OF PAGES

4. REQUISITION/PURCHASE REQ. NO.3. EFFECTIVE DATE2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO. (If applicable)

1. CONTRACT ID CODE

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

05/01/2018

CHECK ONE A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE CONTRACT

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority) appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).

E. IMPORTANT: Contractor is not, is required to sign this document and return __________________ copies to the issuing office.

ORDER NO. IN ITEM 10A.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

This Amendment 5 incorporates the following documents by reference into the RFP:

1) Bid Addendum 2 - Revised Specifications and Drawings dated June 18, 2018; and

2) Questions and answers attached hereto.

The due date for bids remains July 6, 2018 at 3 pm.

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)15A. NAME AND TITLE OF SIGNER (Type or print)

15C. DATE SIGNED 16B. UNITED STATES OF AMERICA 15B. CONTRACTOR/OFFEROR 16C. DATE SIGNED

(Signature of person authorized to sign) (Signature of Contracting Officer)

Thomas Dempsey

STANDARD FORM 30 (REV. 10-83)

Prescribed by GSA

FAR (48 CFR) 53.243

NSN 7540-01-152-8070

Previous edition unusable

Except as provided herein, all terms and conditions of the document referenced in Item 9 A or 10A, as heretofore changed, remains unchanged and in full force and effect .

SI RFI # QUESTION RESPONSE

130.1

(revised response)

Is Commissioning the responsibility of the owner or contractor? Original Response: Commissioning will be performed by the

Owner.

Revised response: Owner will provide the Commissioning

Provider. Contractor is responsible for commissioning requirements per specification section 019113 General

Commissioning Requirements, Division 22, 23 and 26.

133 Please reference specification section 015000 3.2 H. Please confirm this section describing temporary power for the commissary is not applicable to this project.

Section 015000 3.2H describing temporary power for GSB commissary does not apply to this project.

134 Please reference specification section 013951. Part 1.8 A identifies the requirement for the contractor to transport the salvaged items to the COTR’s storage area. Please provide the location of the storage area.

Owner will provide a location near the construction site.

Contractor will be responsible for providing the storage enclosure. Alternatively, per 1.8.E. Contractor may provide off-site storage and protection.

135 Please reference specification section 013951. Part 1.8 B 3 mentions the protection of items during transport and storage of historic items for reinstallation. Please clarify who is responsible for the storage of these materials.

Contractor will be responsible for all work associated with salvaging, transporting and storing the historic items.

136 Please reference specification section 013951. Part 1.8 D identifies that the COTR will arrange for on-site storage. Please clarify the location of this storage.

Owner will provide a location near the construction site.

Contractor will be responsible for providing the storage enclosure. Alternatively, per 1.8.E. Contractor may provide off-site storage and protection.

Renewal of the Bird House at the National Zoological Park

RESPONSES TO BIDDER QUESTIONS

RFP Solicitation No. F18R010034, dated June 27, 2018

RESPONSES TO BIDDER QUESTIONS, RFP Solicitation No. F18R010034 Page 1 of 13

137 Please reference drawings CD101, C121, and TND010. Drawing CD101 note 7 states to “relocate underground communications line, pull fiber back to existing box and leave coiled during construction”.

Drawing TND010 note 1 states “protect all fiber ductbanks, structures until new fiber is installed, terminated and tested”. Drawing C121 shows a new alignment for an underground communications line.

a. Please confirm that the communications line from the north handhold is to be demolished and not protected in place during the bird house renovation.

b. Please confirm that a new communications ductbank shall be constructed from the existing north handhold to the bird house as shown on C121. Additionally, please provide number and size of conduit, and clarify if it is concrete encased.

a) Owner will pull back fiber from within Bird House basement to the existing north handhole below the existing deck and coil in place. Contractor responsible for protecting fiber within and between the two north handholes (handhole below existing deck and handhole labeled as "coffin") and the ductbank between them during construction per CD101, TND001, TN002. The existing fiber ducbank from the Bird House to the north handhole below the exising deck will not need to be protected in place during construction once fiber is protected in place within the handhole.

b) Contractor to provide a new communications ductbank from the existing north handhole below the deck to the Bird House as indicated on C111, C121 and TN002. Ductbank will not be concrete encased. Refer to the specifications for the number and size of conduit. Once the ductbank is in place, Owner will pull the previously protected fiber from the north handhole to the IT room.

Also see response to RFI Revised #81-Amendment 4, and RFI

#169, this Amendment.

138 Please reference drawings C121 and L111. When comparing the tree preservation drawing with the utility drawing, it appears that several portions of new utilities fall within the tree protection Critical Root

Zone. a. Please reissue drawing C121 with the tree preservation

Critical Root Zone limits shown. b. Please confirm that root pruning by a certified arborist will be required to clear the area necessary to install the utilities.

a) Contractor responsible for coordinating tree protection and utility work.

b) Root pruning, air tools and hand excavation within CRZ limits

(all under the direction of a certified arborist) are anticipated to be necessary to install the utilities.

RESPONSES TO BIDDER QUESTIONS, RFP Solicitation No. F18R010034 Page 2 of 13

139 Please reference specification section 320193 Tree & Planting

Protection. Part 1.2 Item 17 indicates the requirement for supersonic air tool and hand excavation within the Critical Root Zone. Please clarify the depth of hand excavation and confirm that it is not required for the full depth of the nearly 15-foot-deep sewer line that is within the Critical Root Zone.

Air tools and hand excavation are required to a depth of 2 feet.

Air tools and hand excavation are not required the full depth of deep excavation. Root pruning may be required in areas of deep excavation.

140 Please reference drawings G006, C142-144, and specification section

015000 TemporaryFacilities and Controls. Drawing G006 defines the location of construction fencing and specification section 015000 Item

2.1 Materials requires an 8-foot chain link fence. Drawing C142-144 shows an “SAF” symbol around the perimeter. This is a 5-foot polyethylene fabric safety fence. Please clarify when fence type is required at the site perimeter.

"SAF" on C142-C144 represents the chain link construction fence per spec 015000. A 6 foot high chain link construction fence may be used in lieu of an 8 foot high chain link construction fence at the LOD perimeter EXCEPT along occupied bird yards 32, 33, 34 and 40 on drawing G006, which must be 8 ft high. A revised spec section 015000 will be provided to the successful bidder.

141 Please reference C112. The drawing calls for rebuilding the block wall at the dumpster area; however, no pad or foundation is shown.

Please clarify if a pad or foundation is required.

Existing concrete block wall is to be removed for construction access. Contractor shall rebuild this wall equivalent to existing conditions upon final site buildout.

142 Please provide as-built drawings for the boardwalks. Boardwalk as-builts are not available.

143 Please provide as-built drawings for the pedestrian bridge. Pedestrian bridge as-builts are not available.

144 Please reference L131. Please confirm that the brick pattern represents unit pavers.

On sheet L131, refer to enlargement plan Sheet L401 - landing layout & materials view. Sheet L401 references paving pattern detail 16/L514.

145 Please confirm the seat walls details (i.e. sheets L511-L512) referencing wood planking are to be IPE wood as noted in the specifications.

Yes, all wood planking on benches are to be IPE wood as noted in spec.

146 Please reference drawing AD102. Keynote 02-07 states to remove item indicated, the note appears to indicate the removal of the elevator door to the basement. In a review of the new work shown on

A102, no work is shown to occur at this location. Please clarify the scope of work at this location.

An existing elevator door is to be removed from the property at this location. No new architectural work occurs in this location except for floor and wall finishes.

RESPONSES TO BIDDER QUESTIONS, RFP Solicitation No. F18R010034 Page 3 of 13

147 Please reference drawing AD102 keynote 02-59. This note indicates that A554 provides additional information. A554 does not contain information related to the keynote. Please clarify.

Keynote 02-59 will be changed to reference Sheet A5-56. A revised drawing will be provided to the successful bidder.

148 Please reference drawing A422. Please provide additional information for preformed FRP staircase shown in details 1 and 2.

The stairs in holding are to be CONC-1 with EP-2 finish, not FRP.

The keynote will be corrected on Sheet A4-22. A revised drawing will be provided to the successful bidder.

149 Please reference drawing A-436. The accessories schedule lists the accessories to be installed; however, the paper towel dispensers, soap dispensers, sanitary napkin disposal, and standing trash cans are not shown on the plans. Please clarify the locations of these items.

1. Paper towel dispensers: There will be one wall mounted paper towel dispenser per restroom to be mounted near the hand blower dryers.

2. Soap dispensers: There will be one wall mounted soap dispenser per sink in each of the restrooms.

3. Sanitary napkin disposal: There will be one partition mounted sanitary napkin disposal per women’s restroom stall.

4. Standing trash cans: There will be one freestanding standing trash can per restroom.

Rvised drawings will be provided to the successful bidder.

150 Please reference A650. Note 3 indicates that sign type D is to be provided throughout the ground floor as required to meet local fire code. Please provide the locations for these signs.

Refer to the signage schedule.

151 Electrical drawing ED101 indicates there is an existing overhead powerline crossing the shared access road and into the existing building. This was also observed on the site walk. This presents both site logistic challenges and major safety concerns. The location of this overhead power line will not allow for safe installation of the façade bracing. Please confirm the contractor is to relocate this line underground.

This would be a means and methods decision as required by contractor.

RESPONSES TO BIDDER QUESTIONS, RFP Solicitation No. F18R010034 Page 4 of 13

152 Please reference LS711, CD102, and G007. LS711 provides the locations of the new (permanent and temporary) life support system lines for the flamingo yard. Site demolition required for these lines is not indicated in the civil documents. Please confirm that sheds 44A and 44B at a minimum need to be demolished to accommodate the life support system lines.

The civil drawings should reference the life support system (LSS) demolition and new work drawings for additional work. Exact location of new life support system lines to be determined in the field. If sheds 44A and 44B are not required to be removed for construction access, the existing life support system lines could be removed up to each side of the sheds and abandoned in place below the sheds.

153 Please provide dimensions for the MEP chase located under Lobby

102 slab on A-102 and detailed on 3/A-312.

The inside clear length of the MEP chase is 40'-7". The inside clear width is 4'-8" from the face of the existing adjacent wall.

The depth from the top of the first floor slab to the top of the slab in the chase is 5'-6". These dimensions will be added to the documents. A revised drawing will be provided to the successful bidder.

154 Please reference detail 4/S-508 and S-102. Please provide the depth of the concrete areaway.

Refer to detail 6/A521 for the depth of the concrete areaway.

155 Please reference S701. Note E indicates that loose rust is to be removed by grinding. Please provide an assumed quantity for loose rust condition.

Assume 25% of the main cables = 500 ft2 of loose rust

Assume interior of spire = 30 ft2 of loose rust

156 Please reference detail 6/S510. Please specify the depth of the slab pocket required to be demolished for the first floor slab construction.

See plan note 15 on S102 for pocketed depths.

157 Please confirm that detail 9A/S508 is applicable at Aviary 3 between

CL N3-N6 and along CL N3.

It was assumed this comment is referring to the existing 12" concrete wall below aviary 3 along grid N3-N6 and N3. Refer to detail 1/S507 for slab to wall connection.

158 Per details 4A, 4B and 4D/S501 and note X1-Earthwork, note H on

S001, 2 layers of vapor barrier are required under the slab on grade.

However, note 4 on S102 indicates only one layer of a 10 mil vapor barrier. Please confirm that one layer of 10-mil vapor barrier will suffice.

Provide two layers of vapor barrier under slab on grade per

Design Notes and Typical Details.

RESPONSES TO BIDDER QUESTIONS, RFP Solicitation No. F18R010034 Page 5 of 13

159 Please reference window and louver schedule on sheet A620, all windows and louvers on schedule are listed as aluminum under the frame material. Confirm that fiberglass windowspec 08 54 13 will not be used on this project. If fiberglass windows will be used, please identify the location on the floor plan.

In the Window and Louver Schedule on Sheet A620, window number 007 in the basement is a Fiberglass window. The schedule will be updated and a revised drawing will be provided to the successful bidder.

160 A. Please reference window and louver schedule on sheet A620. The schedule states that louver Type B and Window Type A are to be 2’-

2”; however, the window type drawings indicate that louver Type A and window Type B are to be 3’-4”. Please clarify the required dimensions.

B. Please reference drawing AD-302. Note 04-43 identifies the line of the exiting historic arch opening. However, where Note 04-43 is referenced in detail 1/AD-302 conflicts withthe actual location of the historic arch found on detail 5/AD-302. Please confirm that the callout labeled in 1/AD-302 is referencing the wrong location and should reference the historic arch.

A. Types A and B are both to be 3’-2” per the window types elevations. The Schedule on Sheet A620 will be updated and a revised drawing will be provided to the successful bidder.

B. Detail 1/AD-302 refers to an original arch structure located within the historic wall, not the historic mosaic arch.

161 Please indicate the extent of the rat slabs detailed on 4/EX-500. The extent of detail 4/EX500 - Rat slab is noted on sheet EX303 and EX304. The rat slab is to be provided to the north and west of ceiling slab to the basement floor within Aviary 3, where there is no sub floor in the planter and shotcrete areas as indicated on the sections on EX303 and EX304 .

162 Please reference sheets EX-425, EX-431 and EX-550. Note 5 on sheet

EX-431 references a Wave Generator that is detailed on 14/EX-550.

Please provide details and elevations for all four sides of the Wave

Machine Concrete Basin.

See attached elevations on revised sheet EX423 and new sheet

EX551 for wave machine wall.

163 Reference the Bird Enclosure Mesh Netting Replacement (Option 1).

Specification 055000-2.2C.8. calls for a 25 Year Warranty (minimum) for the new welded wire steel mesh netting. Please consider reducing the warranty period. The industry standard is 1 year for this product.

A 1 year product warranty and standard project warranty will be accepted in lieu of a 25 year warranty on the Great Flight Aviary

Mesh Netting (Bid Option 1). A revised spec 055000 will be provided to the successful bidder.

RESPONSES TO BIDDER QUESTIONS, RFP Solicitation No. F18R010034 Page 6 of 13

164 Exposed Integral Color Concrete (CONC-3) is listed on the Materials

Schedule on A6-01 but is not shown on the Finish Schedule. Is this to be located at the exterior decks shown on A4-01 and A4-02, Keynote

32-07?

Exposed Integral Color Concrete (CONC-3) is to be located at the exterior decks shown on A1-32 First Floor Finish Plan, and enlarged plans A4-01 and A4-02, keynote 32-07.

165 Stair S4 is not shown on the Finish Schedule on A6-01. Floor Finish

Plan A1-32 seems to indicate that Stair 4 has the CONC-2 polished integral finish. Please provide the finishes for Stair 4.

Refer to RFI #122.

166 Reference specification section 237513 'Factory fabricated penthouse

AHUs' and section 236426 'Rotary screw water chiller'. Is Petra an acceptable manufacturer for these products?

For bidding purposes, Contractor shall provide products from one of the listed manufacturers. Successful Contractor may submit a substitution request form to the SI/Design Team during the submittal process. Substitution request should clearly indicate

Owner benefit of the substitution.

167 Reference specification section 238219 'Fan coil units'. Is Krueger an acceptable manufacturer?

For bidding purposes, Contractor shall provide products from one of the listed manufacturers. Successful Contractor may submit a substitution request form to the SI/Design Team during the submittal process. Substitution request should clearly indicate

Owner benefit of the substitution.

168 Reference specification section 238126 'Split system ACUs'. Is

Samsung an acceptable manufacturer?

For bidding purposes, Contractor shall provide products from one of the listed manufacturers. Successful Contractor may submit a substitution request form to the SI/Design Team during the submittal process. Substitution request should clearly indicate

Owner benefit of the substitution.

RESPONSES TO BIDDER QUESTIONS, RFP Solicitation No. F18R010034 Page 7 of 13

169 The security one line diagram on drawing sheet TY-601 shows a fiber line connecting the building ESS to the head-end panel at the Lion &

Tiger building, however no pathway or distance is provided. Please provide a drawing showing the pathway between the two panels, or provide a distance in order to price the fiber line.

Owner will provide and install as needed fiber for security from the head-end panel at Lion & Tiger building to the IT network switch within the Bird House IT room in the basement. Owner will install fiber through the contractor-provided and installed conduit per RFI #137. Contractor will be responsible for providing and installing all security related conduit, fiber, switches, patch panels, copper, equipment, power supplies, UPS, etc. and all associated work beyond the IT network switch in the Bird House basement IT room to have a fully functional turn key security system.

170 The items requested in section L.1.3 Past Performance, B. Offeror’s

Technical, Safety, Financial, and Corporate Resources requires almost

50 pages. Can this section be excluded from the page count and included as an appendix?

Financial statements can be excluded from the page count.

171 Please reference the traffic coating specification section 07 18 00. The specification provided is for interior use; however, the existing Great

Flight Aviary bridge is to receive a new traffic coating on the top surface. Please provide a specification for the traffic coating on the

Great Flight Aviary bridge.

The product Peda-gard FC by NEOGARD will be added as the Basis of Design to the specification 07 18 00 for the traffic coating at the exterior pedestrian bridge at the Great Flight Aviary. Peda-gard FC will become EP-5 and this information will be added to

Sheet A701 and A601 Material Schedule and Finish Schedule.

Revised drawings and spec will be provided to the successful bidder.

172 Please reference specification section 099600. Section 3.2C.1.a indicates that we are to assume that the Great Flight Aviary coatings include lead-based paint. The levels of the lead are not provided. This area is not included in the Hazardous Materials – Estimated Quantities

(AMA) included Volume 5 of the specifications. Please confirm the specifications are correct. If so, please provide the lead levels for this area.

Contractor is to assume there is no lead based paint or lead containing material on the Great Flight Aviary steel structure or hardware for bidding. Smithsonian is conducting independent tests to confirm. If required, addressing the presence of lead based paint or lead containing material on any Great Flight Aviary surface that is being disturbed will be a contract change for the successful bidder.

RESPONSES TO BIDDER QUESTIONS, RFP Solicitation No. F18R010034 Page 8 of 13

173 If lead is to be assumed for the Great Flight Aviary, the specifications call for commercial blast cleaning. This is not recommended in a lead application. Please clarify.

See RFI #172 response. Contractor to price commercial blast cleaning for bidding.

174 Security reference sheet TY-001 contains notes that appear to be typical and not applicable to the project. Demolition notes 2 through

4 read: 2 – “Maintain existing security devices operationally as long as possible. Coordinate security outage time with COTR and building security", 3 - "If security system outage extends beyond normal business hours, pay for utilizing the Owner's uniformed guard service to provide additional security", and 4 - "Provide mockup of temporary security". Please confirm these notes are not applicable to this project.

Security demolition notes 2-4 do not apply to this project.

175 Fire alarm reference sheet FA-001 general note 1 includes the following statement "Existing fire alarm system shall be removed in its entirety once the new fire alarm system has been completely installed, tested, and approved by SI-OSHEM." Please confirm this note is not applicable to this project.

The note does not apply to this project.

176 Please provide the sign-in sheet for the third site visit. Please see Amendment 4

177 Please reference page 33 of the RFP. Please confirm the following: a.

Section B.5 Multi-year Funding Stream indicates that $12M will be obligated by 1/31/20 or sooner from FY 2019. Please confirm that these funds will be obligated by 1/31/19 rather than 1/31/20. b.

Section B.5 Multi-year Funding Stream indicates that balance of the funding will be obligated by 1/31/21 or sooner from FY 2020. Please confirm that these funds will be obligated by 1/31/20 rather than

1/31/21.

In our recent experience, the availability of fiscal year appropriations do not necessarily track the beginning of the fiscal year.

178 13.d. states “Offers providing less than 0 calendar days for

Government acceptance after the date offers are due will not be considered and will be rejected. Please confirm we do not need to hold our price after bid day.

Offers should be held for 60 days.

RESPONSES TO BIDDER QUESTIONS, RFP Solicitation No. F18R010034 Page 9 of 13

179 Specification Section Metal Fabrications 055000, section C.8, requires a 25-year warranty. The listed manufacturers have indicated that this length of warranty cannot be provided and only the standard project warranty will be provided. Please update the specifications.

See RFI #163 response.

180 Please confirm that detail 6/S-505 applies to the pilaster connection at the existing masonry wall along CL SC on 1st floor.

Detail 6/S505 only applies below the First Floor. Refer to detail

10/S501 for construction of the concrete pilasters above the first floor. Concrete columns above the first floor are not tied to the existing masonry wall.

181 Please reference Food Service Equipment - Specification Section

114003-3. According to the specifications, the basis-of-design is John

Boos & Co. The model numbers given for the three types of table tops do not align with any of John Boos’ equipment. They also do not align with the other two listed manufacturers. These model numbers appear to align with R.W. Rogers Company which is not listed in the specifications. Please provide model numbers for John Boos & Co.

The specification will be revised to show the Basis-of-Design

Products in Section 114003 2.1 A. 1:

a. Type K-1: Model ST4-3072SSK

b. Type K-2: Model ST4-3048SSK

C. Type K-3: Model ST4-3648SSK

182 Please provide the loading capacities for the micropiles for the elevator foundation and the battered micropiles located at the main entrance to the building

Provide 25k min capacity micropiles for the battered micropiles at the benches on S102 and 120k min capacity micropiles for the elevator foundation on S101.

183 The geotechnical report borings inside the building footprint are not deep enough to give a clear picture of the actual subsurface conditions for the micropiles. Some show partially weathered rock that is not far below the pile cap elevations and some show no partially weathered rock. Please provide additional information on the partially weathered rock across the footprint of the building.

For additional information on the subsurface profile see attached

1962 Bird House geotechnical report (borings 5, 5A, 6, 9, 10, 11, 34 only), 2013 Bird House rock elevation profile, and 2016

Flamingo geotechnical report. The successful contractor to perform additional testing as required for the design of the micropiles. Minimum assumed testing to include (2)35' deep soil borings by contractor's geotechnical engineer.

184 Specification section 093000 Tiling indicates that the size of the tile for T3, T4 & T5 is provided on the finish legend. These are not provided on the finish legend. Please confirm the size of the tile.

The sizes of all three types of tile measure 3” x 9”. The finish schedule will be updated to reflect this modification. A revised drawing will be provided to the successful bidder.

RESPONSES TO BIDDER QUESTIONS, RFP Solicitation No. F18R010034 Page 10 of 13

185 Specification Section 09 90 00 2.3 D states that the contractor is responsible for a single layer of primer for all walls that have vinyl graphics, including mural walls. Detail 3/EX301 indicates the mural wall to be by others along the curved ceiling transition meeting to the ceiling. Please confirm the contractor is only responsible for a single layer of primer on these walls, including the curved transitions, and is responsible for painting the ceiling and walls above the murals, roughly from 12’-0” in height and above at Aviaries 1 &2.

Yes, per Sheet EX301 contractor is responsible for primer where

"mural wall, by others" is noted. Painting is required for all surfaces beyond the line maked as "mural wall, by others". This includes the ceiling and walls at skylight well.

186 Drawing sheet ED-102 special note 2 states to disconnect power to existing 15kV switch and remove the feeder back to manhole E-3.

Please provide the location of existing manhole E-3, as well as the details (wire size/quantity) on the existing feeders.

Manhole E-3 is located on E-010. Existing feeders are 15kV 3-

1/C, #1/0.

187 The hazmat report does not currently mention the Great Flight Aviary.

Are we to assume that there is no lead containing paint on the structure and hardware impacted by the Aviary base and option scopes of work?

See RFI #172 response.

188 Specification section 237513 part 3.1 C.3 asks for the fans to be balanced at the fan manufactures facility and also at the AHU manufactures facility after the unit is assembled. Please confirm both tests are required or can you delete the Vibration Analysis in section

3.1 C.3.

Both balancing tests are required.

189 Addendum 2 Item 18 states that the clearance is 11’6” for the aviary bridge. AHU-1 is 126” and AHU-2 is 152”. Do these units need to fit under the aviary bridge.

Bringing the AHUs or other equipment under the Great Flight

Aviary bridge is not required. Contractor to determine the best means of access within the LOW.

190 Per specification section 237513 part 2.11 B.1 are Greenheck fans an acceptable manufacturer?

For bidding purposes, Contractor shall provide products from one of the listed manufacturers. Successful Contractor may submit a substitution request form to the SI/Design Team during the submittal process. Substitution request should clearly indicate

Owner benefit of the substitution.

RESPONSES TO BIDDER QUESTIONS, RFP Solicitation No. F18R010034 Page 11 of 13

191 Per specification section 237513 part 2.14 H is Coilmaster an acceptable coil supplier?

For bidding purposes, Contractor shall provide products from one of the listed manufacturers. Successful Contractor may submit a substitution request form to the SI/Design Team during the submittal process. Substitution request should clearly indicate

Owner benefit of the substitution.

192 Sheet S-701 requires stripping the existing paint from the Aviary structure and hardware, however, sheet A-701 only requires cleaning and preparation for new paint. Please confirm that complete removal of the existing paint is not required.

Great Flight Aviary structure is to be stripped per the structural drawings and spec 099600 3.2.C.1.

193 Please confirm that the multi-year funding breakdown is only to include the base cost and not the options.

The multi-year funding breakdown per RFP B.5 will include the bid options as funding allows, if SI elects to award them.

194 Please reference RFI response 46. The second divisional breakdown has a subtotal for the Base Cost (BASE COST PROPOSAL TOTAL) and the bottom line is Base Cost plus the options (COST PROPOSAL WITH

OPTIONS). Currently, the way the form reads, the bottom total line is the only line that will include the cost of the options. The lines above will only include base costs and will be a duplication of the first divisional breakdown. Is this your intent for this breakdown?

The second divisional breakdown is strictly for the purpose of including a total including all options for clarification.

195 015000 2.1 requires an 8-foot chain link fence, but a 6-foot chain link fence has been accepted on other NZP construction projects. Confirm

8-foot chain link fence is required.

A 6 foot high chain link construction fence may be used in lieu of an 8 foot high chain link construction fence at the LOD perimeter

EXCEPT along occupied bird yards 32, 33, 34 and 40 on drawing

G006, which must be 8 ft high. A revised spec section 015000 will be provided to the successful bidder.

RESPONSES TO BIDDER QUESTIONS, RFP Solicitation No. F18R010034 Page 12 of 13

196 Please reference specification section 015000 Temporary Facilities and Controls. Item 1.5 Informational Submittals states “Site Plan:

Show temporary facilities, utility hookups, staging areas and parking areas for construction personnel”. Item 3.3.F Parking States“No parking areas for construction personnel will be provided on site”. On past projects at the National Zoo, remote areas have been designated by Smithsonian for construction personnel parking and limited material staging. Please clarify if Smithsonian will beproviding parking for contractor personnel for this project. If there will not be space provided at the zoo for construction personnel parking, please clarify if workers can park in the paid parking lots during construction as long as they pay for it.

Smithsonian will not provide parking for contractor personnel.

Workers may not park in the paid parking lots during construction.

197 Spec 055000 2.2.C.1.5. lists a minimum 1/2" gap where wire mesh intersects cables and terminal bars, but maximum 1" x 2" mesh opening. Is the minimum 1/2" gap correct?

Spec 055000 2.2.C.1.5. last line "minimum" should say

"maximum" so that the last line reads as follows: "Where the wire mesh intersects with the cables and terminal bars, a maximum gap of 1/2" is permitted." A revised spec section will be provided to the successful bidder.

198 Reference Amendment 3 - please confirm that the Concord/Terrazzco brand products are an approved product.

See response to RFI #126.

199 Reference Spec Section 075600 - Cold Liquid Applied Membrane

Roofing. Para. 2.2 A.1 lists a PMA system. This is an odorous system and could provide a problem at a Zoo. Siplast (para. 2.2 A.2.a) recommends a Silane Terminated Polymer system which is odor free.

Is this a desired specification revision?

For bidding purposes, Contractor shall provide the specified product. Successful Contractor may submit a substitution request form to the SI/Design Team during the submittal process. Substitution request should clearly indicate Owner benefit of the substitution.

RESPONSES TO BIDDER QUESTIONS, RFP Solicitation No. F18R010034 Page 13 of 13 smoores Text Box 6/25/2018 NZP Bird House RFP Solicitation No. F18R010034 RFI #183 Response 11/7/2013 Bird House Rock Surface

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UNLESS NOTED OTHERWISE.

2. SEE EX425 & EX426 FOR LAYOUT OF LSS

SLAB PENETRATIONS AND INVERTS AT LSS

ELEMENTS.

G1 ACRYLIC GLAZING MARK

SEE SCHEDULE

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4 EDGE OF EXISTING BASEMENT

STRUCTURE.

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NZP RENEW BIRD HOUSE /

EXPERIENCE MIGRATION

NZP BIRD HOUSE

3001 CONNECTICUT AVE, NW

WASHINGTON, DC 20008

0933101

31307600

2121 Ward Place, NW

Washington, DC 20037 v 202 298 6700 f 202 298 6666 www.quinnevans.com

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3001 CONNECTICUT AVE, NW

WASHINGTON, DC 20008

0933101

31307600

2121 Ward Place, NW

Washington, DC 20037 v 202 298 6700 f 202 298 6666 www.quinnevans.com

AMENDMENT06/25/2018

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Geotechnical Engineering Report

National Zoological Park Flamingo Screen Washington, DC

August 25, 2016

19955 Highland Vista Drive, Suite 170 Ashburn, VA 20147 Phone 703 726 8030 ● www.geoconcepts-eng.com smoores Text Box 6/25/2018 NZP Bird House RFP Solicitation No. F18R010034 RFI #183 Response 2016 Flamingo Geotechnical Report

19955 Highland Vista Dr., Suite 170 Ashburn, Virginia 20147

(703) 726-8030 www.geoconcepts-eng.com

August 25, 2016

Ms. Kathryn Slattery, AIA, LEED AP Quinn Evans Architects 2121 Ward Place, NW Washington, DC 20037

Subject: Geotechnical Engineering Report, National Zoological Park – Flamingo Screen, NW, Washington, DC (Our 16136)

Dear Ms. Slattery:

GeoConcepts Engineering, Inc. (GeoConcepts) is pleased to present the following geotechnical engineering report prepared for the National Zoological Park – Flamingo Screen in Washington, DC.

We appreciate the opportunity to serve as your geotechnical consultant on this project. Please do not hesitate to contact me if you have any questions or want to meet to discuss the findings and recommendations contained in the report.

Sincerely, GEOCONCEPTS ENGINEERING, INC.

Scott Nelson, PE Project Engineer Snelson@GeoConcepts-Eng.com

Table of Contents

1.0 Scope of Services

2.0 Site Description and Proposed Construction

3.0 Subsurface Conditions

3.1 Geology

3.2 Stratification

3.3 Groundwater

3.4 Soil Laboratory Test Results

3.5 Seismic Site Classification

4.0 Foundation Analysis

5.0 General Limitations

Figure 1: Site Vicinity Map Figure 2: Structural Fill Undercut Detail

Appendix A: Subsurface Investigation Appendix B: Soil Laboratory Test Results

August 25, 2016 16136 Page 1

1.0 Scope of Services

This geotechnical engineering report presents the results of the field investigation, soil laboratory testing, and engineering analysis of the geotechnical data. This report specifically addresses the following:

• An evaluation of subsurface conditions within the area of the proposed site development, including a seismic site classification per the International Building Code.

• Foundation recommendations for support of the proposed screen wall columns, including recommended soil design parameters.

Services not specifically identified in the contract for this project are not included in the scope of services.

2.0 Site Description and Proposed Construction

The Flamingo exhibit site is located in the Smithsonian National Zoological Park, and is directly south of the Bird House exhibit. A site vicinity map is presented as Figure 1 at the end of this report. The elevation at the site ranges from approximately elevation (EL) 185 feet to EL 187 feet, sloping downward towards the south.

We understand that the project consists of installing a mesh screen over the exhibit to protect the flamingos from native bird droppings. The proposed screen will span the entire exhibit space and will be supported with steel columns bearing on spread footings. Tiebacks will be utilized to anchor the steel columns as well. We understand that the maximum column load will be 170 kips.

Image provided by Google Maps

3.0 Subsurface Conditions

Subsurface conditions were investigated by drilling a total of three test borings just outside of the flamingo enclosure. Test boring logs and a boring location plan are presented in Appendix A of this report.

3.1 Geology

The site lies within the Piedmont Physiographic Province of the District of Columbia. The Piedmont is bordered to the east by the Coastal Plain Physiographic Province and to the west by the Blue Ridge Physiographic Province and contains several fault bordered basins. Bedrock in the Piedmont typically

August 25, 2016 16136 Page 2 consists of highly weathered metamorphic and igneous bedrock. Surface topography in the Piedmont is the result of millions of years of erosion. According to local geologic maps, the site is mapped in the gravel, sand, silt, and clay Terrace Deposits (T2) of the Tertiary Geologic Period, and in the Laurel Formation (€l) of the Cambrian Geologic Period. The Laurel Formation is described as a moderately to well-foliated sedimentary mélange (residual soils). The existing fill soils of Stratum A are believed to be related to previous site grading.

3.2 Stratification

The subsurface materials encountered have been stratified for purposes of our discussions herein. These stratum designations do not imply that the materials encountered are continuous across the site. Stratum designations have been established to characterize similar subsurface conditions based on material gradations and parent geology. The generalized subsurface materials encountered in the test borings completed at the site have been assigned to the following strata:

Stratum A (Existing Fill) loose, clayey and silty SAND (SC/SM) with gravel, micaceous, moist, brown, and stiff sandy SILT (ML) with gravel, moist, brown

Stratum B1 (Residual) firm to very hard, sandy SILT (ML) containing quartz, micaceous, moist, red/brown/green

Stratum B2 hard, silty SAND (SM) containing quartz, micaceous, moist, light brown

Stratum B3 very hard, WEATHERED ROCK, SILT (ML), micaceous, moist, gray and brown

The two letter designations included in the strata descriptions presented above and on the test boring logs represent the Unified Soil Classification System (USCS) group symbol and group name for the samples based on laboratory testing per ASTM D-2487 and visual classifications per ASTM D-2488. It should be noted that visual classifications per ASTM D-2488 may not match classifications determined by laboratory testing per ASTM D-2487.

3.3 Groundwater

Groundwater level observations were made in the field during drilling and after the completion of the test borings. Groundwater was not encountered in any of the test borings during drilling and upon completion of the test borings. Accordingly, groundwater should be below the proposed site grades.

The groundwater observations presented herein are considered to be an indication of the groundwater levels at the dates and times indicated. Where more impervious Strata A and B1 silt soils are encountered, the amount of water seepage into the borings is limited, and it is generally not possible to establish the location of the groundwater table through short term water level observations. Accordingly, the groundwater information presented herein should be used with caution. Also, fluctuations in groundwater levels should be expected with seasons of the year, construction activity, changes to surface grades, precipitation, or other similar factors.

3.4 Soil Laboratory Test Results

Selected soil samples obtained from the field investigation were tested for grain size distribution, Atterberg limits, and natural moisture contents. A summary of soil laboratory test results is presented in the table below, and the results of natural moisture content tests are presented on the test boring logs in Appendix A.

August 25, 2016 16136 Page 3

Test Boring

No.

Depth (ft)

Sample Type Stratum Description of

Soil Specimen

Sieve Results

Atterberg Limits Natural

Moisture Content

Percent Retained #4 Sieve

Percent Passing #200 Sieve

LL PL PI

B-1 8.5-10.0 Jar B1 sandy SILT (ML) 0.3 52.7 47 31 16 26.3

B-2 2.5-4.0 Jar A silty SAND (SM) 12.6 29.3 31 27 4 12.1

B-2 18.5-20.0 Jar A silty SAND with gravel (SM) 27.7 25.2 34 26 8 11.5

B-3 5.0-6.5 Jar A clayey SAND with gravel (SC) 16.6 29.8 39 24 15 15.2

B-3 23.5-25.0 Jar B2 silty SAND (SM) 0.0 22.9 NP NP NP 11.3

Notes:

1. Soil tests are in accordance with applicable ASTM standards

2. Soil classification symbols are in accordance with Unified Soil Classification System

3. Key to abbreviations: LL = liquid limit; PL = plastic limit; PI = plasticity index; NP = nonplastic

3.5 Seismic Site Classification

Based on the results of the subsurface investigation and our knowledge of local geologic conditions, the site soils have been assigned to a site class C per the International Building Code (IBC).

4.0 Foundation Analysis

As requested, we have analyzed spread footing foundations for support of the proposed screen columns.

Based on the test boring data, generally loose existing fill soils are anticipated to be encountered at normal spread footing depths, and are not considered to be suitable for direct support of the proposed screen columns. Accordingly, we recommend undercutting the existing fill to a depth of at least 7 feet below existing grades and replace with compacted dense graded aggregate (e.g. CR-6 or 21-A), and then placing the foundations at normal depths on the compacted dense graded aggregate. This recommendation is illustrated by Figure 2 at the end of this report. After undercutting the existing fill and prior to placement of new fill, the undercut subgrade should be observed by the geotechnical engineer to confirm that the new subgrade is suitable to receive new fill. Spread footings founded on new dense graded aggregate fill may be designed with a net allowable soil bearing pressure of 2,500 psf.

Exterior footing subgrades should be located at least 2.5 feet below final exterior grades for frost considerations. Individual column footings and continuous wall footings should be at least 30 inches and 18 inches wide, respectively, for local or punching shear considerations. A maximum slope of one horizontal to one vertical (1H:1V) should be maintained between the bottom edges of adjacent footings.

Footing subgrades should be observed and approved by the Geotechnical Engineer of Record or his/her representative prior to placement of concrete, to ascertain that footings are placed on suitable bearing soils as recommended herein. Footings should be excavated and concrete placed the same day in order to avoid disturbance from water or weather. Disturbance of footing subgrades by exposure to water seepage or weather conditions should be avoided. Any disturbed, frozen, or soft subgrade soils should be removed prior to placing footing concrete. It may be desirable to place a 3- to 4-inch thick “mud mat” of lean concrete immediately on the approved footing subgrade to avoid softening of the exposed subgrade. Forms

August 25, 2016 16136 Page 4 may be used if necessary, but less subgrade disturbance is anticipated if excavations are made to the required dimensions and concrete placed against the soil. If footings are formed, the forms should be removed and the excavation backfilled as soon as possible. Water should not be allowed to pond along the outside of footings for long periods of time.

We recommend the following soil design parameters be used for the design of the screen columns including the anchors:

Stratum

Total Unit

Weight (pcf)

Angle of Internal Friction

(degrees)

Lateral Earth Pressure Coefficients Coefficient of Sliding Friction

Horizontal Soil

Modulus (pci)

Active (Ka)

At- Rest (Ko)

Passive (Kp)

A 120 28 0.361 0.531 2.77 0.30 25

B1 120 28 0.361 0.531 2.77 0.35 50

B2 120 28 0.361 0.531 2.77 0.35 50

B3 130 38 0.238 0.384 4.20 0.50 175

5.0 General Limitations

Recommendations contained in this report are based upon the data obtained from the relatively limited number of test…