Attachment 1 - Freetown Specifications (Rev 01).pdf

U.S. Department of State Roof & Façade Management Program

A M E N D M E N T N o . 1

DATE: August 31, 2026 POST: FREETOWN, Sierra Leone SUBJECT: Chancery, Rec, & CACs Roof Replacement Project

This Amendment forms a part of the Contract Documents and modifies the original Bidding Documents.

SPECIFICATIONS:

1. Section 00003 – Table of Contents – Amended

2. Section 01010 – Summary of Work – Amended

3. Section 011150 – Construction Security – Amended

4. Section 07010 – Stone Coping Cleaning – ADDED by Amendment

DRAWINGS:

1. Drawing G00 - Cover Sheet – Amended

2. Drawing A06 - CACs Existing Roof Plans – Amended

3. Drawing A07 - CACs New Roof Plans – Amended

END OF AMENDMENT No. 1

OBO PROJECT MANUAL & SPECIFICATIONS

June 1st, 2026

AMENDMENT No. 1 – August 31, 2026 NEW OFFICE BUILDING, RECREATION CENTER, & CACs ROOF REPLACEMENT

FREETOWN, SIERRA LEONE

Roof & Façade Management Program Oversea Building Operations

Washington DC

NOB ROOF REPLACEMENT

06.01.2026 August 31, 2026 AMENDMENT No. 1

SECTION 00003 – TABLE OF CONTENTS

Division 1 01010 – Summary of Work -AMENDED 01115 – Construction Security -AMENDED 01120 – Alterations Project Procedures 01022 – Site Information 01500 – Temporary Facilities and Controls 01535 – Roof Construction Safety 01700 – Project Close-out

Division 2 02072 – Minor Removals and Renovation Work

Division 3 - 6 Not used

Division 7 07010 – Stone Coping Cleaning -ADDED BY AMENDMENT 07526 – Hot Rubberized Protected Membrane Roofing 07620 – Sheet Metal Flashing

Division 8 Not used

Division 9 09910 – Exterior Painting

Division 10 – 16 Not Used

Division 17 17000 – Temporary Electromechanical Disconnects

END OF TOC

06.01.2026 SUMMARY OF ROOF WORK 01010 - 1

August 31, 2026 AMENDMENT No. 1

SECTION 01010 - SUMMARY OF ROOF WORK

PART ONE - GENERAL

1.01 SUMMARY:

A. The U.S. Embassy Freetown and Overseas Buildings Operations (OBO) has a requirement to replace the existing roofs on the New Office Building (NOB), Recreation Building (REC), and the Compound Access Control Buildings (CACs).

B. The approximate roof areas of each roof are as follows:

1. NOB Floors 2 & 3 10,000 sq. ft.

2. NOB Lower Level 10,500 sq. ft.

3. NOB Upper Level 2,500 sq. ft.

4. REC 2,500 sq. ft.

5. CACs (combined) 7,500 sq. ft.

C. The work includes, but is not limited to, the following:

1. Removal and disposal of existing roofing, flashings, and insulation down to the structural concrete deck.

2. Clean deck to base concrete.

3. Installation of hot rubberized asphalt membrane.

4. Installation of new base flashings and counterflashings at penetrations, curbs, walls, and perimeters.

5. Installation of protection course, drainage course, new XPS insulation, filter fabric, and concrete pavers in a PMR configuration. Note: at NOB 4th Floor west roof, XPS Insulation may be salvaged if in good condition.

6. Lowering of roof drains, scuppers, conductor heads, and downspouts to accommodate new membrane levels.

7. Temporarily disconnecting, rerouting, & reinstalling of existing conduits, lightning protection, and piping on roofs.

8. Removal of abandoned penetrations, curbs, and equipment.

9. Painting of ferrous metals, including drain strainers, pipes, etc.

10. At NOB front and rear entrance canopies, troubleshoot and repair leaks.

11. Apply vapor-permeable coating of inside of parapet above counterflashing (CACs only).

12. Clean stone copings and replace sealant at joints (CACs only).

1.02 SUBMITTALS:

A. Detailed project schedule showing work phasing and proposed daily progress.

B. Applicator's License Certificate: Roofing material manufacturer's agreement indicating date application was approved and expiration date.

C. Material manufacturer's product data sheets, written approval/acceptance of specified tests for project, fastener pattern layout, details, insulation, and all related materials based upon existing site conditions.

D. Shop Drawings of all specific waterproofing details.

E. Construction Accident Prevention Plan (CAPP) F. Contractor’s & manufacturer’s warranties that are to be issued upon project completion.

1.03 SUBSTITUTIONS AND PRODUCT OPTIONS:

06.01.2026 SUMMARY OF ROOF WORK 01010 - 2

A. Contractor's Representation: Request for substitution constitutes a representation that Contractor:

1. Has investigated proposed product and determined that it is equal to or superior in all respects to that specified.

2. Shall provide same warranties for substitution as for product specified.

3. Shall coordinate installation of accepted substitution into Work and make such other changes as may be required for Work to be complete in all respects.

4. Waives all claims for additional costs, under his responsibility, related to substitution which subsequently becomes apparent.

5. If substitution is not approved or accepted, Contractor shall furnish specified product.

1.04 QUALITY CONTROL:

A. Overseas Buildings Operations has the right to inspect and test all services, to the extent practicable at all times and places during the work. OBO may perform full-time quality assurance inspections [QAI] and tests during construction to confirm the work is installed according to the Contract Documents.

B. Contractor shall maintain quality control over suppliers, manufacturers, products, services, site conditions, and workmanship to produce work of specified quality.

C. Contractor shall be approved by manufacturer to perform the work for the specified guarantee period.

D. Contractor shall be responsible for the following construction inspections and tests:

1. Roof Metal Manufacturer’s Warranty Inspection

1.05 STORAGE OF MATERIALS:

A. Proper storage of materials is the sole responsibility of Contractor. Protect all materials susceptible to moisture including, but not limited to, all roll goods, insulation, wood, and plywood in dry, above ground, watertight storage. Keep all labels intact and legible, clearly showing the product, manufacturer, and other pertinent information.

B. Store materials on site. Cover and protect materials subject to damage by weather, including during transit. Stored materials shall be available for inspection.

C. Store flammable and volatile liquids in sealed containers located a minimum of 20 feet from existing buildings.

D. Liquid products shall be delivered sealed, in original containers. Store roll goods in an upright position.

E. Distribute material, debris, and equipment over the roof deck to avoid damage to the structural deck. Place materials and equipment to be stored on the roof as nearly direct over structural members as can be determined. Secure equipment, material, and debris on the roof to prevent movement by wind or other elements.

1.06 PROJECT PROCEDURES:

A. Embassy will occupy premises during entire period of construction for the conduct of normal, daily operations. Cooperate with Embassy's Representative in all construction operations to minimize conflict and to facilitate Embassy usage.

B. Contractor shall conduct his operations so as to ensure least inconvenience to Embassy's operations.

C. Contractor shall take precautions to avoid excessive noise or vibration that would disturb Embassy's operations. When directed by Embassy, Contractor shall perform certain

06.01.2026 SUMMARY OF ROOF WORK 01010 - 3

operations at designated time of day or night in order to minimize disturbance to Embassy's operations.

D. Contractor shall take all necessary precautions to assure a watertight condition in the operation portion of the building during construction.

PART TWO - PRODUCTS

Not Used.

PART THREE - EXECUTION

3.01 PERIOD OF PERFORMANCE: (NOTE: All Days Indicated are Calendar Days)

A. Solicitation:

1. Proposals: 30 days after RFP

2. Site Visit: 3 days on-site

3. Questions & Answers: 30 days

4. Award: DAY ONE

B. Pre-Construction:

1. Product submittals 60 days after award

3. OBO Review: 30 days

4. Products submittal revisions: 30 days after OBO comments

5. OBO Approval: 30 days

6. US & Local Crew Submissions: 10 days

7. OBO & RSO Review: 30 days C. Construction:

1. Material Procurement: 30 days

2. Shipping & Customs: 30 + 15 days

3. NOB (all Roof Areas): 120 days on-site

4. REC: 30 days on-site

5. CACs: 45 days on-site

5. TOTAL DAYS ON SITE 195 days

D. TOTAL PERIOD of PERFORMANCE 430 DAYS

E. Rainy Season Months: May - November

END OF SECTION

NOB, REC, & CACs ROOF REPLACEMENT

UNCLASSIFIED

07/01/2026 CONSTRUCTION SECURITY 01 11 50 - 1

SECTION 01 11 50 – CONSTRUCTION SECURITY

PART ONE – GENERAL

1.01 SUMMARY:

A. Drawings and Specifications for this project are UNCLASSIFIED (U).

B. Limit dissemination of unclassified information on a need-to-know basis. Assume responsibility for unclassified information as received, including drawings, sketches, photographs, written descriptions of work requirements, and similar information. Return such information promptly to COR upon request.

C. The work in this section involves interfaces with several security-related Government entities and includes, but is not limited to:

1. Screenings and Background Checks for Local Labor.

2. Access to Site and Work Area.

3. Procurement and Shipping Logistics.

4. Accommodating Surveillance and Inspection by Government.

1.02 DEFINITIONS:

A. CONTROLLED ACCESS AREA (CAA) are areas within a building where classified information will be handled, stored, discussed or processed. For this project, the CAA is the structural roof deck and the office space directly below the roof deck in the Chancery Office Building.

B. CLEARED U.S. CITIZEN possesses a current validated security clearance as required by the DD-254, the Contractor’s facility clearance, and authorized to be at the project site.

C. SITE SECURITY MANAGER (SSM) is the Regional Security Officer (RSO) or a properly appointed designee responsible for this project.

D. CONSTRUCTION SECURITY PLAN (CSP) is a certification plan for the Project’s security requirements prepared by OBO listing principal actions, clearance levels, materials classification and logistics similar to this specification section. This plan will be sent to the Post for their use and information during the Project.

1.03 SUBMITTALS:

A. Security Clearances: Submit a Visitation Authorization Request (VAR) to include dates of the project, clearance level, date of birth, social security number and Letters of Consent (LOC) for each individual traveling to the project site. VAR shall be requested for one year.

B. Where background checks are required for workers and subcontractors including manufacturer’s representatives and others performing work in limited-access, submit information required for securing clearances well in advance of time such accesses will be needed, typically twenty–one (21) days.

C. Vehicle Clearances: Submit authorization requests, to include dates, vehicle type, license number and driver name, for each motorized vehicular construction implement which is required to be on-site. Schedule vehicles to arrive during off hours when possible. Provide one day's advanced notice on vehicle arrivals times.

D. Shipping Plans: Provide written plan for shipment of materials to include the following information:

1. Port(s) of embarkation, debarkation and shipment route.

2. Estimated time of arrival and duration of intermediate stops.

UNCLASSIFIED

07/01/2026 CONSTRUCTION SECURITY 01 11 50 - 2

3. Company names and countries-of-registry for contemplated sea/air carrier(s), and freight forwarder(s).

4. Bill of Materials (SECURE shipments only)

PART TWO – PRODUCTS

Not Used.

PART THREE – EXECUTION

3.01 U.S. CLEARED PERSONNEL:

A. Contractor personnel’s minimum level of security clearance for this Project is SECRET.

B. Obtain security clearances for:

C. Persons involved with performance of work.

D. Persons requiring access to confidential materials/information/equipment.

E. Escort Training may be provided by the Department of State for the contractor’s supervisory personnel who will be escorting uncleared personnel on-site.

F. Contractor's personnel at all levels may be required to attend counter-intelligence briefings and host country briefings, and may be required to attend debriefings when returning from host country.

G. Management personnel are required to attend special security briefings/debriefings concerning the reporting requirements on unusual incidents/activities/information relating to Project Security.

3.02 LOCAL LABOR:

A. An Escort Ratio of the number of host country or third country national uncleared personnel to local security guard force or U.S. cleared citizens shall be determined by Regional Security Officer.

B. Local labor may be used on this Project, provided that unclear laborers are escorted by U.S. cleared personnel at all times.

3.03 ACCESS TO SITE:

A. Access to the roof:

1. U.S. cleared citizens shall access from the INTERIOR and EXTERIOR of the building.

2. Uncleared personnel shall access from the INTERIOR and EXTERIOR of the building.

3. Material loading/off loading shall be from the EXTERIOR of the building.

B. Contractor shall be responsible to escort their uncleared personnel, including vehicles, at all times while on the site. Limit personnel movement through the interior. SSM will determine access routes and allowable hours.

C. Identification Badges: The Government will issue identification badges, coded to indicate status and level of security clearance. Require uncleared person(s) to leave their badges upon leaving Project Site each day.

D. Search Procedures: Government reserves the right to conduct search of belongings both at point of entering Project Site and at point of leaving.

UNCLASSIFIED

07/01/2026 CONSTRUCTION SECURITY 01 11 50 - 3

3.04 SHIPPING OF MATERIALS:

A. Materials for this Project are UNCLASSIFIED and shall be shipped NON-SECURE.

B. Use surface and air carriers in the following order of preference:

1. U.S. military (SECURE shipments only)

2. U.S. flag carriers

3. Foreign flag carriers of countries which are not on Designated Countries List.

C. All U.S. purchased materials that will penetrate the outermost plane of the CAA will be procured in the US by minimum Secret cleared US citizens, without the vendor being aware of the ultimate destination. Materials and equipment will be forwarded to a DS approved Consolidated Receiving Point (CRP) for onward SECURE shipping.

D. Government reserves the right, in its sole discretion, to determine whether products have been compromised, and therefore cannot be used in CAAs and adjacent areas. Where such compromise results from Contractor's failure to comply with security procedures, the Contractor shall bear entire cost associated with rectification of compromise and restoration of required security provisions.

3.05 PROTECTION OF MATERIALS:

A. Materials for this Project shall be procured by NON-SECURE or LOCAL means and stored

NON-SECURE.

B. Maintain confidentiality in procurement of products by non-disclosure of destination information until items are fully procured and protected.

C. Approved Procurement Methods for this Project:

1. Secure U.S. Procurement: Select quantity required from chosen supplier. Submit specific Bill of Materials for procurement of products/materials/equipment to be shipped SECURE to the site. For each product identify:

a. Vendor and address

b. Material type and quantity

c. Country of origin, defined as location where end product is produced.

d. Country of purchase for items to be procured outside the U.S.

2. Non-Secure U.S. Procurement: No restrictions on U.S. procured inspectable or non-inspectable products/materials/equipment shipped to the site.

3. Local Random Procurement: Procure limited quantities of inspectable or non-inspectable products/materials/equipment randomly from local suppliers.

Repeated procurements of same items or from same supplier shall be limited.

Select quantity required from random chosen supply, and amounting to not more than 25 percent of supply available.

a. Local random procurement of project materials and equipment will be performed by minimum Secret cleared US citizen, only be used on a limited basis, and will comply with DS regulations.

b. The selection of a vendor for specific materials shall be made from at least three vendors capable of providing the necessary materials and/or equipment. One vendor from the list shall be selected without referral or prior notification.

4. Local Unrestricted Procurement: Procure raw materials locally and without security restrictions on handling and storage; these are subject to Government's reasonable inspection and requirement for random daily selections in use.

UNCLASSIFIED

07/01/2026 CONSTRUCTION SECURITY 01 11 50 - 4

a. Water, and other bulk-contained fluid/gas products.

b. Temporary materials and services, including scaffolding and concrete formwork.

c. The ingredients and premixing of poured-in-place concrete, excluding reinforcing steel.

d. Sand, gravel, crushed stone, mortar, plaster, stucco, grout, and similar work.

D. Storage Procedures:

1. Location and locked control of storage and staging area belongs exclusively to

SSM.

2. Place incoming products in staging area, and immediately inspect selected items for signs of tampering or alteration before placing in storage or other SECURE areas as designated by SSM.

3.06 INSPECTIONS:

A. Government reserves the right to require suspension of work where introduction or attempted introduction of unauthorized materials into the work has been detected. At Government's option and direction, Contractor is responsible for costs and time losses associated with rectification of work to correct such unauthorized actions.

B. The use of photographic equipment and taking of photographs is restricted on and nearby Project Site. Request permission from the RSO to carry equipment on-site and take photographs.

END OF SECTION

07 01 00 - 1 August 31, 2026 AMENDMENT No. 1 STONE COPING CLEANING

August 31, 2026

SECTION 07 01 00 - STONE COPING CLEANING

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary

Conditions and Division 01 Specification Sections, apply to this Section.

1.2

SUMMARY

A. Section includes cleaning the following:

1. Polished granite surfaces.

B. The purpose of the cleaning process is to remove organic and surface soil without damage to or disintegration of the stone surfaces. The result of the cleaning is expected that organic growth, surface dirt, contaminants, etc., will be removed to the extent shown in the mockups, as approved by the Project Director/COR.

C. Based on mockup testing and barring any adverse reactions by building materials, the biocide shall be the cleaner for all surfaces. It is not anticipated that cleaning of a substrate with both a detergent and a biocide will be required; however, depending upon which of the specified cleaning products is used, a different product may be required for the stone, and any adjacent surfaces.

D. NOTE: Extraordinary precautions shall be taken with respect to protecting the existing glazing units, Refer to Part 3 Protection and Cleaning of this specification.

E. Related Requirements:

1. 07 92 00 “Joint Sealants” for coordination with exterior facade sealant removal and replacement activities.

1.3

DEFINITIONS

A. Very Low-Pressure Spray or Rinse: Under 100 psi (690 kPa).

07 01 00 - 2 August 31, 2026 AMENDMENT No. 1 STONE COPING CLEANING

August 31, 2026

1.4 PREINSTALLATION MEETINGS

A. Preinstallation Conference: Conduct conference at Project site. Review methods and procedures related to cleaning masonry including, but not limited to, the following:

1. Meet with Project Director/COR and installers whose work interfaces with or affects or is impacted by cleaning processes to review the facade cleaning work to be performed.

2. Review construction schedule. Verify facade-cleaning equipment and facilities needed to make progress and avoid delays.

3. Review materials, material application, and sequencing. Review manufacturer’s literature and Safety Data Sheets (SDS) for all products to be used in facade cleaning.

4. Review cleaning program.

5. Review mockup requirements.

6. Review procedures for coordination with building occupants and with other facade work in progress that interfaces with or may be affected by cleaning processes.

7. Review temporary protection requirements for existing substrates and finishes to remain, for site features, and protection for workers and other personnel on site.

8. Review water control and management procedures to prevent infiltration into the existing building and for removal of any standing water on horizontal surfaces.

1.5 SEQUENCING AND SCHEDULING

A. Coordinate cleaning operations with stone sealant removal and replacement activities, and other exterior work.

B. Work Sequence: Perform coping cleaning work in the following sequence:

1. Perform mockup and review.

2. Generally, perform copimg cleaning work prior to stone sealant replacement to provide clean substrates for repairs. Contractor is to provide anticipated sequence of cleaning and roofing work for review by Project Director/COR.

C. Scaffolding:

1. Do not anchor to existing stone cladding.

2. Scaffolding attached to concrete: As scaffolding is removed, patch anchor holes used to attach scaffolding. Patch holes in concrete with cement grout in preparation for air barrier systems.

1.6 ACTION SUBMITTALS

A. Product Data: For each type of product.

07 01 00 - 3 August 31, 2026 AMENDMENT No. 1 STONE COPING CLEANING

August 31, 2026

1. Include material descriptions and application instructions. Include manufacturer’s literature and Safety Data Sheets (SDS) for all products to be used in facade cleaning.

2. Include test data substantiating that products comply with requirements.

1.7 INFORMATIONAL SUBMITTALS

A. Qualification Data: For chemical-cleaner manufacturer.

B. Qualification Data: For field supervisors, to demonstrate their capabilities and experience.

Include lists of completed projects utilizing the cleaning methods specified herein with project names and addresses, names, addresses, and telephone numbers of owners.

C. Manufacturers Certification: From cleaning chemical manufacturers that none of the prohibited chemicals in part 3 of this specification or chemicals prohibited by the glazing manufacturer are present in the submitted products.

D. Cleaning program.

1.8 QUALITY ASSURANCE

A. Cleaning Product Manufacturer Qualifications: A firm regularly engaged in producing masonry and metal cleaners that have been used for similar applications with successful results, and with factory-authorized service representatives who are available for consultation.

B. Field Supervision: Firms shall maintain full-time supervisors with a minimum of five years of experience on similar projects on Project site during times that facade cleaning is in progress.

C. Cleaning Program: Prepare a written cleaning program that describes cleaning process in detail, including materials, methods, and equipment to be used; protection of surrounding materials, site features, and workers and other personnel; and control of runoff during operations. Include provisions for supervising worker performance and preventing damage.

1. If materials and methods other than those specified are proposed for any phase of cleaning work, add a written description of such materials and methods, including evidence of successful use on comparable projects and demonstrations to show their effectiveness for this Project. Do not proceed with materials and methods other than those specified without prior approval by the Project Director/COR.

D. Mock-ups: Prepare mock-ups of cleaning on existing surfaces at location shown on the

Drawings or, if not shown, at locations directed by the Project Director/COR to demonstrate aesthetic effects and to set quality standards for materials and execution.

1. Intent of mock-ups is to evaluate materials and methods to be used in cleaning stone copings for effectiveness in removing soiling and organic growth from polished granite.

Complete mock-ups of detergent cleaners and biocide and select one or more systems depending on evaluation of mock-ups. Note that either detergent cleaners or biocides

07 01 00 - 4 August 31, 2026 AMENDMENT No. 1 STONE COPING CLEANING

August 31, 2026 may effectively remove soiling and organic growth, but that only biocides will mitigate or slow reappearance of organic growth. Therefore, barring any adverse reactions by building materials the biocide shall be the cleaner for all surfaces. It is not anticipated that cleaning of a substrate with both a detergent and a biocide will be required; however, a different product may be required for the stone, and any adjacent surfaces.

2. All materials and methods to be used in the mock-ups must be submitted and approved prior to performing the cleaning mock-up.

3. Cleaning: Clean two areas of stone coping approximately 5 lin. ft. (1.5 lin. m) each that includes typical conditions of polished granite, one using detergent cleaner, and a second area of the same size and conditions using biocide.

a. Test cleaners and methods on samples of adjacent materials for possible adverse reactions.

b. Exterior surfaces of adjacent glazing units are to be thoroughly prewet prior to cleaning and thoroughly rinsed after cleaning is completed.

4. Approval of mock-ups does not constitute approval of deviations from the Contract

Documents unless Project Director/COR specifically approves such deviations in writing.

5. Subject to compliance with requirements, approved mock-ups may become part of the completed Work if undisturbed at time of Substantial Completion.

1.9 FIELD CONDITIONS

A. Weather Limitations: Proceed with installation only when existing and forecasted weather conditions permit cleaning work to be performed according to product manufacturers' written instructions and specified requirements.

PART 2 - PRODUCTS

2.1 CLEANING MATERIALS

A. Water: Potable.

B. Detergents:

1. Proprietary Detergent (for use on stone or metal):

a. Basis of Design Product: Provide Prosoco EnviroKlean 2010 All-

Surface Cleaner, pH = 10.5 at up to 1:10 dilution (volume/volume), by Prosoco, Inc., Kansas City, Kansas, or comparable product approved by Project Director/COR.

07 01 00 - 5 August 31, 2026 AMENDMENT No. 1 STONE COPING CLEANING

August 31, 2026

C. Biocides (Mold, Mildew, and Algae Remover):

1. Proprietary Biocide (for use on stone; may be used for cleaning metal based on approved mock-ups):

a. Basis of Design Product: Provide D/2 Biological Solution, a quaternary ammonium chloride solution, pH = 9.5 at undiluted concentration, by D/2

Biological Solutions, Inc., or comparable product approved by Project

Director/COR.

2.2

CLEANING SOLUTIONS

A. Dilute cleaners with water to produce solutions not exceeding concentration recommended in writing by chemical-cleaner manufacturer.

2.3

MISCELLANEOUS MATERIALS

A. Masking Materials: Non-staining, nonabsorbent material; compatible with chemical solutions being used and substrate surfaces; and that will easily come off entirely, including adhesive.

B. Other Products: Materials and methods used in successful mock-up and approved by the Project

Director/COR.

PART 3 - EXECUTION

3.1 PROTECTION

A. Comply with each manufacturer's written instructions for protecting building and other surfaces against damage from exposure to its products. Prevent chemical cleaning solutions from coming into contact with people, motor vehicles, landscaping, buildings, and other surfaces that could be harmed by such contact.

1. Cover adjacent surfaces with materials that are proven to resist chemical cleaners used unless products being used will not damage adjacent surfaces. Use protective materials that are waterproof and UV resistant. Apply masking agents according to manufacturer'swritten instructions. Do not apply liquid strippable masking agent to painted porous or glazing surfaces. When no longer needed, promptly remove masking to prevent adhesive staining.

2. Additional protection shall be taken to protect glazings from construction hazards.

Coordinate any protective measures with the glazing manufacturer. Since many adhesives will attack glazings, any additional film or protections used on glazing surfaces shall be approved by the glazing manufacturer.

3. Do not apply chemical solutions during winds of enough force to spread them to unprotected surfaces.

4. Neutralize alkaline and acid wastes before disposal.

07 01 00 - 6 August 31, 2026 AMENDMENT No. 1 STONE COPING CLEANING

August 31, 2026

5. Dispose of runoff from operations by legal means and in a manner that prevents soil erosion, undermining of paving and foundations, damage to landscaping, and water penetration into building interiors.

3.2 CLEANING, GENERAL

A. Cleaning Appearance Standard: Cleaned surfaces are to have a uniform appearance as viewed from 20 feet (6 m) away by Project Director/COR.

B. Proceed with cleaning in an orderly manner; work from one end of each elevation to the other. Ensure that dirty residues and rinse water do not wash over dry, cleaned surfaces.

C. Use only those cleaning methods indicated for each coping location.

1. Brushes: Do not use wire brushes or brushes that are not resistant to chemical cleaner being used. Use only natural-fiber or plastic-bristle brushes, as recommended by cleaning product manufacturer, that will not damage existing granite finishes. Use soft cloth for cleaning aluminum. Only use processes recommended by the glazing manufacturer for cleaning the existing glazing.

2. Spray Equipment: Use spray equipment that provides controlled application at volume and pressure indicated, measured at nozzle. Adjust pressure and volume to ensure that cleaning methods do not damage surfaces, including joints.

a. Equip units with pressure gauges.

b. For chemical-cleaner spray application, use low-pressure tank or chemical pump suitable for chemical cleaner indicated, equipped with nozzle having a cone-shaped spray.

c. For water-spray application for prewetting and rinsing, use fan-shaped spray that disperses water at an angle of 45 degrees.

D. Perform each cleaning method indicated in a manner that results in uniform coverage of all surfaces, including corners, moldings, and interstices, and that produces an even effect without streaking or damaging masonry surfaces. Keep wall wet below area being cleaned to prevent streaking from runoff.

07 01 00 - 7 August 31, 2026 AMENDMENT No. 1 STONE COPING CLEANING

August 31, 2026

1. Protection: After cleaning is complete, remove protection no longer required. Remove tape and adhesive marks.

E. Perform additional general cleaning, and spot cleaning of small areas that are noticeably different when viewed according to the "Cleaning Appearance Standard" Paragraph, so that cleaned surfaces blend smoothly into surrounding areas.

F. Water Application Methods:

1. Water-Spray Applications for Prewetting and Rinsing: Unless otherwise indicated, hold spray nozzle at least 12 inches (300 mm) from wall surface and apply water in horizontal back-and-forth sweeping motion, overlapping previous strokes to produce uniform coverage.

G. Chemical-Cleaner Application Methods: Apply chemical cleaners to masonry surfaces according to chemical-cleaner manufacturer's written instructions; use brush or spray application at less than 50 psi. Avoid wind drift of spray-applied cleaners. Do not allow chemicals to remain on surface for periods longer than those indicated or recommended in writing by manufacturer.

H. Rinse off chemical residue and soil by rinsing each treated area thoroughly at each stage or scaffold setting. Periodically during each rinse, test pH of rinse water running off of cleaned area to determine that chemical cleaner is completely removed. Repeat rinse if tested pH is not between 6.5 and 7.5. Perform a final rinse of each wall area from top to bottom.

I. After cleaning is complete, remove protection no longer required. Remove tape and adhesive marks.

3.3 PRELIMINARY CLEANING

A. Preliminary Cleaning: Before beginning general cleaning, remove extraneous substances such as sealant that are resistant to planned cleaning methods. Exercise care during removal to avoid damaging substrate.

3.4 (NOT USED)

3.5 CLEANING MASONRY AND METAL

A. Detergent Cleaning:

1. For Prosoco EnviroKlean 2010 All-Surface Cleaner:

a. Prewet wall surface with very low-pressure water.

b. Liberally apply diluted EnviroKlean 2010 All Surface Cleaner to the surface using a soft-bristled nylon brush, being careful to completely cover surface of area, including crevices. Allow to dwell for 15 minutes. Dwell time to be confirmed by approved test

07 01 00 - 8 August 31, 2026 AMENDMENT No. 1 STONE COPING CLEANING

August 31, 2026 samples.

c. On areas of cleaning exposed to wind or sunlight, monitor areas of work during dwell time to ensure that applied cleaners do not dry on the surface. Areas that begin to dry should be lightly misted with water.

d. Just prior to rinsing, agitate surface again by scrubbing gently and thoroughly with a nylon bristle brush. Care should be taken when scrubbing the stone during cleaning to avoid scrubbing the glass or metal window frames.

e. Rinse thoroughly with very low-pressure warm water. Rinse with clean water until the pH of the surface has returned to neutral.

f. Repeat cleaning and rinsing sequence described above as necessary until cleaning standard established by approved samples is met.

g. The wall should be rinsed until the pH of the surface has returned to neutral. This may take a minimum of 5 minutes. A second rinse within an hour of the first for at least 2 additional minutes shall be performed to remove any cleaner residue. This second rinsing shall be performed with very low-pressure water.

B. Organic Growth (Mold, Mildew, and Algae) Removal:

1. For D/2 Architectural Biocide:

a. Dry-brush area to remove dense biological growth with a soft nylon bristle brush.

b. Liberally apply D/2 cleaner to the surface using a soft-bristled nylon brush, being careful to completely cover surface of area including crevices. Allow to dwell for 10 to 15 minutes.

c. Apply additional D/2 as necessary to maintain a wet surface.

d. Scrub with soft nylon or natural bristle brush. Lightly mist with water and continue scrubbing.

e. Rinse thoroughly with low pressure warm water.

3.6 FINAL CLEANING

A. Clean adjacent surfaces of spillage and debris. Use detergent appropriate to substrate, and soft brushes or cloths.

B. Remove masking materials, leaving no residues that could trap dirt.

END OF SECTION 07 01 00

G00 COVER PAGE

A01 NOB EXISTING ROOF PLAN

A05 REC EXISTING & NEW ROOF PLAN

A06 CACs EXISTING ROOF PLAN - AMENDMENT 1

A04 NOB UPPER LEVEL NEW ROOF PLAN

A02 NOB LEVEL ONE & TWO NEW ROOF PLAN

A03 NOB LOWER LEVEL NEW ROOF PLAN

A08 DETAILS

A09 DETAILS

A07 CACs NEW ROOF PLAN - AMENDMENT 1

G01 SITE PLAN

1 AMENDMENT 1 08/31/2026

NOTES:

ALL MEASUREMENTS SHOWN ARE

APPROXIMATE. CONTRACTOR IS

RESPONSIBLE FOR FIELD VERIFYING

ALL CONDITIONS & MEASUREMENTS.

30872

67102630

12073

11897

NOTES:

ALL MEASUREMENTS SHOWN ARE

APPROXIMATE. CONTRACTOR IS

RESPONSIBLE FOR FIELD VERIFYING

ALL CONDITIONS & MEASUREMENTS.