W912DS-19-B-0008_Specs_Book_2_of_4.pdf

U.S. Army Corps of Engineers

New York District

DESIGN SPECIFICATIONS

West Point, New York CBUP Bradley Barracks, Building #756

FY 19 PN 81723

June 14, 2019

100% Final Design Submission

Specifications (2 of 4):

Division 04 Division 05 Division 06 Division 07 Division 08 Division 09 Division 10 Division 12 Division 14

Contract #: W912DS17D0007

Task Order #: W 9 1 2 – D S – 1 7 – F 0 0 6 2

UNCLASSIFIED / FOUO

West Point, New York Contract #W912DS17D0007 CBUP Bradley Barracks, Building #756 T.O. #W192-DS-17-F0062

PROJECT TABLE OF CONTENTS

DIVISION 00 - PROCUREMENT AND CONTRACTING REQUIREMENTS

00 00 01 COVER SHEET

00 00 02 CHECK LIST FOR BIDDERS

00 10 00 SF 1442 AND BIDDING SCHEDULE

00 21 16 INSTRUCTIONS, CONDITIONS, AND NOTICE TO BIDDERS

00 22 20 PROPOSAL SUBMISSION REQUIREMENTS AND INSTRUCTIONS

00 24 00 EVALUATION FACTORS FOR AWARD

00 72 00 CONTRACT CLAUSES

00 75 95 ROOF SYSTEM 20-YEAR DIAGNOSTICS / PERFORMANCE WARRANTY

DIVISION 01 - GENERAL REQUIREMENTS

01 11 00 SUMMARY OF WORK

01 14 00 WORK RESTRICTIONS

01 22 00.00 10 PRICE AND PAYMENT PROCEDURES

01 30 00 ADMINISTRATIVE REQUIREMENTS

01 32 01.00 10 PROJECT SCHEDULE

01 32 33 PHOTOGRAPHIC DOCUMENTATION

01 33 00 SUBMITTAL PROCEDURES

01 33 29 SUSTAINABILITY REPORTING

01 35 26 GOVERNMENTAL SAFETY REQUIREMENTS

01 35 91 HISTORIC TREATMENT PROCEDURES

01 42 00 SOURCES FOR REFERENCE PUBLICATIONS

01 45 00.00 10 QUALITY CONTROL

01 45 00.15 10 RESIDENT MANAGEMENT SYSTEM CONTRACTOR MODE (RMS CM)

01 45 20.00 18 TESTING FOR MECHANICAL AND ELECTRICAL SYSTEMS

01 45 35 SPECIAL INSPECTIONS

01 50 00 TEMPORARY CONSTRUCTION FACILITIES AND CONTROLS

01 57 19 TEMPORARY ENVIRONMENTAL CONTROLS

01 58 00 PROJECT IDENTIFICATION

01 74 19 CONSTRUCTION AND DEMOLITION WASTE MANAGEMENT

01 78 00 CLOSEOUT SUBMITTALS (WEST POINT)

01 78 23 OPERATION AND MAINTENANCE DATA

01 78 24.00 10 FACILITY DATA REQUIREMENTS

01 91 00.15 TOTAL BUILDING COMMISSIONING

DIVISION 02 - EXISTING CONDITIONS

02 41 00 DEMOLITION

02 81 00 TRANSPORTATION AND DISPOSAL OF HAZARDOUS MATERIALS

02 82 00 ASBESTOS REMEDIATION

02 83 00 LEAD REMEDIATION

02 84 16 HANDLING OF LIGHTING BALLASTS AND LAMPS CONTAINING PCBs

AND MERCURY

02 84 33 REMOVAL AND DISPOSAL OF POLYCHLORINATED BIPHENYLS (PCBs)

02 85 00 MOLD REMEDIATION

DIVISION 03 - CONCRETE

03 01 00 REHABILITATION OF CONCRETE

03 11 13.00 10 STRUCTURAL CAST-IN-PLACE CONCRETE FORMING

03 15 00.00 10 CONCRETE ACCESSORIES

03 20 00.00 10 CONCRETE REINFORCING

03 30 00 CAST-IN-PLACE CONCRETE

03 35 00.00 10 CONCRETE FINISHING

03 39 00.00 10 CONCRETE CURING

PROJECT TABLE OF CONTENTS Page 1 Project No. 20180320 100% Final Design Submission June 14, 2019

03 42 13.00 10 PLANT-PRECAST CONCRETE PRODUCTS FOR BELOW GRADE

CONSTRUCTION

DIVISION 04 - MASONRY

04 03 00 CONSERVATION TREATMENT FOR PERIOD MASONRY

04 20 00 UNIT MASONRY

DIVISION 05 - METALS

05 05 23.16 STRUCTURAL WELDING

05 12 00 STRUCTURAL STEEL

05 30 00 STEEL DECKS

05 40 00 COLD-FORMED METAL FRAMING

05 50 13 MISCELLANEOUS METAL FABRICATIONS

05 51 00 METAL STAIRS

05 52 00 METAL RAILINGS

05 72 00 DECORATIVE METAL RESTORATION

DIVISION 06 - WOOD, PLASTICS, AND COMPOSITES

06 10 00 ROUGH CARPENTRY

06 20 00 FINISH CARPENTRY

06 61 16 SOLID SURFACING FABRICATIONS

DIVISION 07 - THERMAL AND MOISTURE PROTECTION

07 05 23 PRESSURE TESTING AN AIR BARRIER SYSTEM FOR AIR TIGHTNESS

07 11 13 BITUMINOUS DAMPPROOFING

07 13 53 ELASTOMERIC SHEET WATERPROOFING

07 14 00 FLUID-APPLIED WATERPROOFING

07 17 00 BENTONITE WATERPROOFING

07 21 13 BOARD (TYP.) INSULATION

07 21 16 MINERAL FIBER BLANKET INSULATION

07 22 00 ROOF AND TRAFFIC DECK INSULATION

07 24 00 EXTERIOR INSULATION AND FINISH SYSTEMS

07 27 10.00 10 BUILDING AIR BARRIER SYSTEM

07 27 26 FLUID-APPLIED MEMBRANE AIR BARRIERS

07 27 36 SPRAY FOAM AIR BARRIERS

07 42 13 METAL WALL PANELS

07 52 00 MODIFIED BITUMINOUS MEMBRANE ROOFING

07 60 00 FLASHING AND SHEET METAL

07 62 13 COPPER SHEET METAL FLASHING AND TRIM

07 81 00 SPRAY-APPLIED FIREPROOFING

07 84 00 FIRESTOPPING

07 92 00 JOINT SEALANTS

DIVISION 08 - OPENINGS

08 11 13 STEEL DOORS AND FRAMES

08 14 00 WOOD DOORS

08 51 13 ALUMINUM WINDOWS

08 71 00 DOOR HARDWARE

08 81 00 GLAZING

08 91 00 METAL WALL LOUVERS

DIVISION 09 - FINISHES

09 22 00 SUPPORTS FOR PLASTER AND GYPSUM BOARD

PROJECT TABLE OF CONTENTS Page 2

09 22 36 LATH

09 23 00 GYPSUM PLASTERING

09 29 00 GYPSUM BOARD

09 30 10 CERAMIC, QUARRY, AND GLASS TILING

09 51 00 ACOUSTICAL CEILINGS

09 62 38 STATIC-CONTROL FLOORING

09 66 16 TERRAZZO FLOOR TILE

09 66 23 RESINOUS MATRIX TERRAZZO FLOORING

09 67 23.13 STANDARD RESINOUS FLOORING

09 68 00 CARPETING

09 90 00 PAINTS AND COATINGS

09 96 00 HIGH-PERFORMANCE COATINGS

DIVISION 10 - SPECIALTIES

10 11 00 VISUAL DISPLAY UNITS

10 14 00.20 INTERIOR SIGNAGE

10 21 13 TOILET COMPARTMENTS AND SOLID PHENOLIC CASEWORK

10 26 00 WALL AND DOOR PROTECTION

10 28 13 TOILET ACCESSORIES

10 44 16 FIRE EXTINGUISHERS

10 51 13 METAL LOCKERS

10 56 13 STEEL SHELVING

DIVISION 12 - FURNISHINGS

12 21 00 WINDOW BLINDS

12 48 13 ENTRANCE FLOOR MATS AND FRAMES

DIVISION 14 - CONVEYING EQUIPMENT

14 24 23 HYDRAULIC PASSENGER ELEVATORS

DIVISION 21 - FIRE SUPPRESSION

21 12 00 STANDPIPE SYSTEMS

21 13 13.00 10 WET PIPE SPRINKLER SYSTEM, FIRE PROTECTION

21 30 00 FIRE PUMPS

DIVISION 22 - PLUMBING

22 00 00 PLUMBING, GENERAL PURPOSE

22 07 19.00 40 PLUMBING PIPING INSULATION

DIVISION 23 - HEATING, VENTILATING, AND AIR CONDITIONING (HVAC)

23 00 00 AIR SUPPLY, DISTRIBUTION, VENTILATION, AND EXHAUST SYSTEMS

23 01 30.41 HVAC SYSTEM CLEANING

23 05 15 COMMON PIPING FOR HVAC

23 05 48.19 BRACING FOR HVAC

23 05 93 TESTING, ADJUSTING, AND BALANCING FOR HVAC

23 07 00 THERMAL INSULATION FOR MECHANICAL SYSTEMS

23 09 00 INSTRUMENTATION AND CONTROL FOR HVAC

23 09 13 INSTRUMENTATION AND CONTROL DEVICES FOR HVAC

23 09 23.01 LONWORKS DIRECT DIGITAL CONTROL FOR HVAC AND OTHER

BUILDING CONTROL SYSTEMS

23 21 23 HYDRONIC PUMPS

23 25 00 CHEMICAL TREATMENT OF WATER FOR MECHANICAL SYSTEMS

23 57 10.00 10 FORCED HOT WATER HEATING SYSTEMS USING WATER AND STEAM

PROJECT TABLE OF CONTENTS Page 3

HEAT EXCHANGERS

23 64 10 WATER CHILLERS, VAPOR COMPRESSION TYPE

23 81 00 DECENTRALIZED UNITARY HVAC EQUIPMENT

DIVISION 25 - INTEGRATED AUTOMATION

25 08 10 UTILITY MONITORING AND CONTROL SYSTEM TESTING

25 10 10 UTILITY MONITORING AND CONTROL SYSTEM (UMCS) FRONT END

AND INTEGRATION

DIVISION 26 - ELECTRICAL

26 00 00.00 20 BASIC ELECTRICAL MATERIALS AND METHODS

26 08 00 APPARATUS INSPECTION AND TESTING

26 09 13 POWER MONITORING SYSTEM

26 20 00 INTERIOR DISTRIBUTION SYSTEM

26 24 13 SWITCHBOARDS

26 28 01.00 10 COORDINATED POWER SYSTEM PROTECTION

26 29 23 VARIABLE FREQUENCY DRIVE SYSTEMS UNDER 600 VOLTS

26 41 00 LIGHTNING PROTECTION SYSTEM

26 51 00 INTERIOR LIGHTING

26 56 00 EXTERIOR LIGHTING

26 56 10 HISTORIC EXTERIOR LIGHTING RESTORATION

DIVISION 27 - COMMUNICATIONS

27 05 14.00 10 CABLE TELEVISION PREMISES DISTRIBUTION SYSTEM

27 05 28.36 40 CABLE TRAYS FOR COMMUNICATIONS SYSTEMS

27 10 00 BUILDING TELECOMMUNICATIONS CABLING SYSTEM

27 51 16 RADIO AND PUBLIC ADDRESS SYSTEMS

DIVISION 28 - ELECTRONIC SAFETY AND SECURITY

28 05 26.00 40 GROUNDING AND BONDING FOR ELECTRONIC SAFETY AND SECURITY

28 08 10 ELECTRONIC SECURITY SYSTEM ACCEPTANCE TESTING

28 10 05 ELECTRONIC SECURITY SYSTEMS (ESS)

28 31 76 INTERIOR FIRE ALARM AND MASS NOTIFICATION SYSTEM

DIVISION 31 - EARTHWORK

31 00 00 EARTHWORK

31 05 19 GEOTEXTILE

31 11 00 CLEARING AND GRUBBING

DIVISION 32 - EXTERIOR IMPROVEMENTS

32 05 33 LANDSCAPE ESTABLISHMENT

32 11 23 AGGREGATE BASE COURSES

32 12 13 BITUMINOUS TACK AND PRIME COATS

32 12 16 HOT-MIX ASPHALT (HMA) FOR ROADS

32 13 16.23 STAMPED CONCRETE PAVING

32 16 19 CONCRETE CURBS, GUTTERS AND SIDEWALKS

32 17 23 PAVEMENT MARKINGS

32 31 13 CHAIN LINK FENCES AND GATES

32 93 00 EXTERIOR PLANTS

DIVISION 33 - UTILITIES

33 01 30.16 TV INSPECTION OF SEWER PIPELINES

PROJECT TABLE OF CONTENTS Page 4

33 01 30.72 RELINING SEWERS

33 11 00 WATER UTILITY DISTRIBUTION PIPING

33 30 00 SANITARY SEWERAGE

33 40 00 STORM DRAINAGE UTILITIES

33 82 00 TELECOMMUNICATIONS OUTSIDE PLANT (OSP)

-- End of Project Table of Contents --

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PROJECT TABLE OF CONTENTS Page 6

SECTION 04 03 00

CONSERVATION TREATMENT FOR PERIOD MASONRY

11/17

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

AMERICAN CONFERENCE OF GOVERNMENTAL INDUSTRIAL HYGIENISTS (ACGIH)

ACGIH 0100 (2015; Suppl 2002-2016) Documentation of the Threshold Limit Values and Biological Exposure Indices

ASTM INTERNATIONAL (ASTM)

ASTM A36/A36M (2014) Standard Specification for Carbon Structural Steel

ASTM C1324 (2015) Standard Test Method for Examination and Analysis of Hardened Masonry Mortar

ASTM C1405 (2015) Standard Specification for Glazed Brick (Single Fired, Brick Units)

ASTM C170/C170M (2017) Standard Test Method for Compressive Strength of Dimension Stone

ASTM C1713 (2012) Standard Specification for Mortars for the Repair of Historic Masonry

ASTM C207 (2006; R 2011) Standard Specification for Hydrated Lime for Masonry Purposes

ASTM C615/C615M (2011) Standard Specification for Granite Dimension Stone

ASTM C568/C568M (2015) Standard Specification for Limestone Dimension Stone

ASTM C67/C67M (2018) Standard Test Methods for Sampling and Testing Brick and Structural Clay Tile

ASTM E2659 (2018) Standard Practice for Certificate Programs

ASTM E96/E96M (2016) Standard Test Methods for Water Vapor Transmission of Materials

SECTION 04 03 00 Page 1

NATIONAL PARK SERVICE (NPS)

NPS Hist Prop (2017) National Standards for the Treatment of Historic Properties with Guidelines for Preserving, Rehabilitating, Restoring, and Reconstructing Historic Buildings

NPS TPS Brief 1 (2000) Assessing Cleaning and Water-Repellent Treatments for Historic Masonry Buildings

THE MASONRY SOCIETY (TMS)

TMS MSJC (2016) Masonry Standard Joint Committee's (MSJC) Book - Building Code Requirements and Specification for Masonry Structures, Containing TMS 402/ACI 530/ASCE 5, TMS 602/ACI 530.1/ASCE 6, and Companion Commentaries

1.2 GENERAL REQUIREMENTS

It is the intent of this specification to protect the historic structure to the greatest extent possible. Use the gentlest means to perform the work and take the greatest care to ensure that the historic materials are not damaged in the process of the work.

1.2.1 Work Included:

The work of this Section consists of the repair and restoration of the exterior limestone and granite of Bradley Barracks. Work includes, but is not limited to:

a. Cleaning soiling conditions on the masonry including biological growth, water stains, and efflorescence from limestone; hreavy iron stains, and biological growth from the granite.

b. Removing and resetting masonry units to install new flashing, or replace deteriorated or improperly installed flashing and lintels.

These areas include the limestone copings, granite and gneiss above the window lintels, limestone pier caps, and copings on sally port parapets.

c. Replacing severely deteriorated limestone units, some piers caps, as indicated on the Drawings, with new limestone to match the original.

d. Retooling granite and limestone units to remove loose and deteriorated stone and to properly shed water.

e. Installing Dutchman repairs for large areas of loss with stone that matches the original in color, texture, and profile.

f. Grouting and patching masonry cracks.

g. Patching small and incipient spalls with a composite patching material that matches the original stone.

h. Replacement of failed glazed brick at west exterior basement stair.

SECTION 04 03 00 Page 2

i. Disassemble and reset displaced entry stair units.

j. Remove failed mortar shed at coping flashing and re-point.

1.3 DEFINITIONS

Terms are defined below as applicable to this project.

1.3.1 Aggregates

The sand component of mortar.

1.3.2 Biocides

A chemical treatment that inhibits, deters, or controls organic growth.

Such growth is typically removed by cleaning following biocide treatment.

1.3.3 Binder

The component of mortar that binds together the aggregate particles into a cohesive material.

1.3.4 Lime Crack Injection with Crack Injection Grout

A repair method in which a restoration grout material is injected into small cracks ranging in width from hairline to 1/8 in by use of port or syringe.

1.3.5 Consolidant

A chemical product meant to strengthen loose or deteriorated stone.

1.3.6 Dutchman

A repair method in which deteriorated stone is removed in part and replaced with salvaged, harvested or new stone to make a seamless patch.

1.3.7 Harvested

Units removed from inconspicuous areas of the building.

1.3.8 In situ

A term referencing a repair procedure in which the masonry units and mortar remain in place and are repaired without removal from the wall system

1.3.9 Joint Sealant

A flexible, chemical product that is used to create a weather-tight seal at the boundary of masonry units with other units or dissimilar materials.

1.3.10 Lead Flashing

An extruded lead material that is inserted into joints to assist in precluding water entry into the masonry.

SECTION 04 03 00 Page 3

1.3.11 Lime Wash

A protective surface treatment comprised of calcium hydroxide particles in suspension in water, along with small amounts of calcium carbonate, silica particles and other minerals.

1.3.12 Mockup

Specific area on the building approved by Contracting Officer to demonstrate the ability to apply, match and install specified materials.

1.3.13 Mortar

A mixture of binders, aggregates, and pigments used for reconstruction, pointing/repointing or stucco applications.

1.3.14 New Elements

New, non-historic materials added to masonry structures to aid in their ability to resist loads (typically seismic) or to resist water infiltration.

1.3.15 Patch

The use of substitute repair materials to treat damaged or deteriorated masonry units in situ.

1.3.16 Remediate

An intervention of a historic masonry structure and its component materials with the intent to maintain the original fabric to the greatest extent possible.

1.3.17 Remove

Specifically for historic masonry materials, the term means to detach an item from existing construction to the limits indicated.

1.3.18 Replace

To reinstall an item in its original position (or where indicated) after remedial treatment, or to duplicate and reinstall an entire item with new material; with the original item serving as the pattern for creating the duplicate.

1.3.19 Repoint

To remove existing mortar joints to the specified depth and replace with a mortar that matches in color, texture, and performance with water vapor transmission, bond, hardness, and flexibility compatible with original mortar, as assessed in accordance with ASTM C1713.

1.3.20 Retool

A repair method in which a chisel is used to re-create the surrounding stone texture finish by removing loose pieces of stone.

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1.3.21 Stucco

A mixture of binders and aggregates, sometimes including animal hair or fibers used for the repair treatment of existing stucco.

1.3.22 Surface Treatment

The application of traditional materials or contemporary chemical products to the surface of masonry to provide protection to the masonry units and mortar and/or reduce water infiltration.

1.3.23 Test Panel

Specific area on the building approved by the Contracting Officer to demonstrate individual applicator competency and workmanship proficiency prior to the start of restoration work.

1.3.24 Tuckpointing

Often called skim-coating, an American practice of surface repairing mortar joints without the required removal of existing deteriorated mortar beneath. This practice is not recommended for mortar joint repair work on historic masonry. There is also an acceptable British form of tuckpointing practice that involves careful thin penciling of smaller joints within larger ones to give the wall the appearance of an ashlar finish.

1.3.25 Water Repellent

A surface-applied chemcial intended to reduce liquid water entry into a masonry wall without significantly affecting the vapro transmission properties of the original material.

1.3.26 Wall System

A term used to address the fact that masonry structures are comprised of different materials but function holistically, requiring that all restoration and cleaning process take into account the implications of the treatment to the adjacent materials and the building as a whole.

1.3.27 Masonry Treatment Requirement (MTR)

Defined treatments that are required by the specification (contract) documents for project specific repairs to masonry.

1.3.28 Saturated Surface Dry (SSD)

Condition of the wall surface after water has been applied sufficient to saturate more than the surface, then allowed to dry until the surface is dry but the body of the masonry still has moisture.

1.4 ADMINISTRATIVE REQUIREMENTS

1.4.1 Pre-Installation Meeting

Prior to beginning the work of this Section, convene a meeting with the Contracting Officer's Representative(s) to review the requirements of the Quality Control Plan, Project Training Program, installation procedures, location of required mockup areas, and all job conditions and processes.

All subcontracting firms involved with this work must participate in this

SECTION 04 03 00 Page 5 meeting.

1.5 SUBMITTALS

If alternate methods and materials to those specified are proposed for any phase of the work, provide written description. Provide evidence of successful use on comparable projects and demonstrate its effectiveness for use on this project.

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for Contractor Quality Control approval. Submit the following in accordance with Section 01 33 00

SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

Quality Control Plan; G, RO

Project Training Program; G, RO

Qualifications; G, RO

SD-02 Shop Drawings

Photographic Documentation; G, RO

Structural Upgrades; G, RO

SD-03 Product Data

Qualifications; G, RO

Cleaning and Restoration Methods; G, RO

Cleaning Materials; G, RO

Biocides; G, RO

Replacement Mortar; G, RO

Mortar Mix; G, RO

SD-04 Samples

Mock-ups; G, RO

SD-05 Design Data

Calculations for Structural Upgrades; G, RO

SD-06 Test Reports

Testing and Matching; G, RO

Existing Sealants for Asbestos and PCBs; G, RO

SD-07 Certificates

Repair Materials; G, RO

SECTION 04 03 00 Page 6

1.6 QUALITY CONTROL

1.6.1 Quality Control Plan

Prior to beginning restoration and cleaning work, submit a written Quality Control Plan. Do not proceed without written approval of the Quality Control Plan. At a minimum, include the following items in the Quality Control Plan:

a. Describe methods of dust containment during the work specific to the work of this section.

b. Describe the methods of protecting surrounding masonry, windows, doors, roof, and building trim as well as surrounding landscape.

Provide drawings of protection when requested.

c. Describe the work procedures, materials, and proposed tools to use for each Masonry Treatment Requirement (MTR) specified.

d. Describe the sequence of each MTR.

e. Describe how each MTR sequence and the overall construction schedule changes with weather variations and how completed work will be protected.

f. Describe the methods for surveying and documenting original layout and collecting datum points and plumb lines for rebuilding masonry.

g. Describe the methods for shoring and providing a safe working environment. Shoring drawings and calculations to be approved by a structural engineer licensed to practice in the State of New York.

h. Describe the tools and methods for select deconstruction of individual masonry units and tools/methods for cleaning the masonry for reuse.

Include equipment, approach and length of time the masonry will be out of the wall/dwell time

i. Describe the method and approach to mortar joint removal.

j. Describe the method and approach for assuring repair material compatibility with original materials.

k. Describe the method and approach to cleaning mortar, coating, smears and old patching materials from the masonry surfaces.

l. Describe, in detail, the procedures relating to techniques and tools proposed for masonry matching.

m. Describe the complete masonry removal and matching procedures; include equipment, approach, length of time the masonry will be out of the wall, documentation on mapping the location, and where (on-site or in shop) the masonry units will be repaired.

n. Describe the procedure for matching of different colors at different locations, including setting mortar, pointing mortar, cementitious stone patching material, stone dutchmen, and stone replacement units.

o. Describe the procedure for mixing and matching of repair materials.

SECTION 04 03 00 Page 7

p. Describe the methods and system by which the use of reclaimed masonry units can be utilized.

q. Describe the methods for setting masonry back into its original position and maintaining the original bond patterns and joint width.

r. Describe the methods of transition points where replacement/preservation work will meet the original historic work.

s. Describe the on-site project training program. Provide the opportunity for workers to be trained in each masonry treatment requirement (MTR) as work proceeds.

t. Provide documentation for mapping the locations and the method for labeling the stone to be reset. Submit a storage plan for all stone that is to be removed and salvaged.

1.6.2 Qualifications

1.6.2.1 Historic Masonry Consultant

a. Secure the services of a historic masonry consultant with a minimum of 10 years' experience applying NPS Hist Prop as they relate to the work in this section.

b. Submit a resume that describes five relevant projects within that period and include how NPS Hist Prop was applied to the work of similar scope and scale and what jurisdiction or agency was involved in approving the work.

c. The consultant's services include:

(1) Investigating the condition of the masonry materials and mortar.

(2) Arranging for material analysis in the laboratory

(3) Recommending appropriate cleaning methods and materials

(4) Recommending restoration options.

(5) Providing project specific specifications.

(6) Providing an on-site training program.

(7) Providing quality control services during construction.

(8) Recommending appropriate repair and restoration materials.

1.6.2.2 Masonry Firm

a. The firm performing the masonry work must have a minimum of five years experience on relevant projects.

b. The firm must have completed work similar in material, design, and extent to that indicated for this Project and demonstrate a record of successful in-service performance.

c. Proven implementation of NPS Hist Prop and related Preservation Briefs

SECTION 04 03 00 Page 8 are required.

d. Submit a resume that describes the required experience.

1.6.2.3 Field Supervisor

Retain an experienced full-time supervisor on the project site at all times when masonry restoration is in progress. A single individual must be responsible for supervising the historic masonry restoration work throughout the duration of the project.

Submit a resume that describes the required experience.

1.6.2.4 Masonry Applicator

a. Employ craftspeople who are experienced with and specialize in restoration work of the types they will be performing.

b. All masonry restoration treatments must be performed by a craftsperson that is familiar with historic masonry construction and has worked on historic masonry projects for at least five years.

c. Only skilled technicians who are familiar and experienced with the materials and methods specified may be used.

d. Submit resumes for all historic masonry applicators, demonstrating the required experience.

1.6.3 Project Training Definition and Use

In addition to five years demonstrable experience on masonry restoration projects, offer workers project training certificate(s) within the framework of ASTM E2659. Project training certificates are earned by individual workers and issued with the understanding that they are for limited time use, enforceable only to this specific project and for a specific MTR. It is not necessary, nor a requirement of this specification, that all restoration workers obtain all project training certificates offered. Rather it is desirable that workers be trained for each project specific task they will perform to ensure the highest quality results from the cleaning and restoration program.

1.6.4 Mortar Analyst

Laboratory mortar analysis equipment should be operated by and results analyzed by trained personnel experienced with analysis of historic masonry mortar.

1.6.5 Documentation

Submit digital photographic documentation of the all phases of masonry restoration, including prior to the start of restoration work.

Provide thorough photo documentation of the project and project details and targeted areas.

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1.6.6 Cleaning and Restoration Methods

1.6.6.1 General Procedure

a. Submit the cleaning and restoration methods, and materials selected for a specific structure for approval before work starts.

b. Perform cleaning and restoration mock-ups for approval before proceeding with work. Take into account the total construction system of the building to be worked upon, including different masonry and mortar materials, as well as non-masonry elements which may be affected by the work.

c. Utilize mockups to identify the appropriate cleaning and restoration treatment and materials and set the standard for each project task.

d. Demonstrate the correct execution of the approved cleaning and restoration methods and materials during the on-site workmanship training program within the framework of ASTM E2659.

1.6.6.2 Cleaning Products and Procedures

1.6.6.2.1 General Cleaning Requirements

a. Establish cleaning products and procedures during the mockup process.

b. Select the least aggressive method used to achieve the desired level of cleanliness.

c. Where chemical products are selected for cleaning, use them in accordance with the manufacturer's instructions.

1.6.6.2.2 Cleaning Mock-Ups

a. Demonstrate the materials, equipment, and methods to be used in cleaning in a test section approximately 3 feet by 3 feet.

b. Locate test patches in inconspicuous areas of the building. The areas tested are subject to approval by the Contracting Officer. The areas tested must exhibit soiling characteristics representative of those larger areas to be cleaned.

c. Adjust the cleaning process as required and the test section rerun until an acceptable process is obtained.

d. Allow tested areas to dry before a determination is made on the effectiveness of a particular treatment.

1.6.7 Masonry Restoration Products and Procedures

1.6.7.1 General Restoration Requirements

a. Do not use masonry or mortar in the work until the mock-ups and the represented material and workmanship have been submitted and approved.

b. Demonstrate the methods and quality of workmanship to be performed in each masonry treatment requirement (MTR). Provide a mock-up for each MTR indicated.

SECTION 04 03 00 Page 10

1.6.7.2 General Restoration Mock-Up Requirements

a. Throughout restoration, retain approved mock-up panels in undisturbed condition, suitably marked, as a standard for judging completed work.

b. Review manufacturer's product data sheets to determine suitability of each product for each surface.

c. Apply products using manufacturer-approved application methods, determining actual requirements for application.

d. Obtain approval as to the preservation treatment approach, design, and workmanship to include, but not limited to the verification of all material applications and finishes as specified to the requirements of color, texture, profiles, and finishes before proceeding with work.

e. May be performed on inconspicuous sections of actual construction under the same weather conditions expected the remainder of the work.

f. Repair unacceptable work.

1.6.7.3 Restoration Mock-Ups

1.6.7.3.1 Retooling Stone Masonry In Situ

Demonstrate treatment technique and methods to retool three deteriorating gneiss/granite units in situ to remove the loose material.

1.6.7.3.2 Masonry Removal and Replacement

Demonstrate techniques for removing the affected masonry without damaging the surrounding masonry and materials scheduled to remain.

Fully remove masonry unit and replace to specified dimensions and texture.

Select size of masonry units representing typical conditions. Select masonry unit for replacement mock up from units identified for replacement in base contract scope. Return one masonry unit to same location, set to surrounding profile joint width and bond pattern. Set masonry unit using specified mortar. Confirm with Contracting Officer's Representative that the replacement masonry units meet specification requirements for matching and that sufficient quantity required for the work have been identified.

Leave one stone dry-set into opening set on wood shims for evaluation and approval of preparation conditions.

1.6.7.3.3 Substitute Repair Material

1.6.7.3.3.1 Patching

Apply repair material on at least two masonry units for repair. Include one masonry unit on which to demonstrate proficiency in removing previous patching material and repairing with new substitute repair material.

Include the removal of metal anchors at two locations and fill in the holes with repair material on the second masonry unit (where applicable).

1.6.7.3.3.2 Dutchman

Undertake dutchman repairs in two locations, including one that is only cut and prepared for application. Demonstrate the quality of the stone insert, as well as the workmanship and techniques to be performed in the

SECTION 04 03 00 Page 11 dutchman repairs. Do not proceed with other dutchman repairs until the technique has been approved.

1.6.7.3.4 Crack Repair

Repair one crack, 1 foot in length, using injection grouting procedure.

1.7 DELIVERY, STORAGE, AND HANDLING

a. Furnish cement in suitable bags used for packaging cements.

b. Provide packages with labeling that clearly defines contents, manufacturer, and batch identification.

c. Provide detergents, masonry cleaners, solvents, epoxies and other chemicals and repair materials used for masonry cleaning and restoration in sealed containers that legibly show the designated name, formula or specification number, quantity, date of manufacture, manufacturer's formulation number, manufacturer's directions including any warnings and special precautions, and name of manufacturer and other pertinent information.

d. Store materials for use in the work of this section under environmental conditions recommended by the manufacturer. Store materials in weathertight structures which will protect all materials from moisture and contaminants.

e. Store accessories to avoid contamination and deterioration.

f. Do not use admixtures which have been in storage onsite for six months or longer, or which have been subjected to freezing, unless retested and proven to meet the specified requirements.

1.8 PROJECT/SITE CONDITIONS

1.8.1 Environmental Requirements

a. Do not place materials when weather conditions adversely affect the quality of the finished product.

b. Do not place masonry or mortar when the air or surface temperature is below 40 degrees F in the shade and will remain so for at least 48 hours after completion of the work. Heated enclosures may be used to overcome ambient weather restrictions, where such enclosures are feasible.

c. Do not place masonry or mortar when air or surface temperature is above 90 degrees F with a wind speed above8 miles per hour and will remain so for at least 48 hours after completion of the work.

d. Do not place masonry or mortar when air or surface temperature is above 100 degrees F with or without wind and will remain so for at least 48 ours after completion of the work.

e. Do not perform work or place materials during periods of rain or other precipitation. Stop material placements, and protect all in-place material from exposure, during periods of rain or other precipitation.

f. Clean masonry surfaces when air temperatures are above 40 degrees F

SECTION 04 03 00 Page 12 and will remain so until masonry has dried out, but for not less than 7 days after completion of the work.

g. Do not perform work in wind conditions that may blow materials onto surfaces not intended to be treated.

1.8.2 Masonry Installation Requirements

a. Phase work during hot weather by performing work on the shady side(s) of the building during daylight hours and on the daylight side(s) of the building during cooler evening hours to prevent premature evaporation of the water from the mortar.

b. Do not use frozen materials or materials mixed or coated with ice or frost. Do not apply materials to frozen surfaces; allow complete thawing prior to installation.

c. Do not lower the freezing point of mortar by the use of admixtures or anti-freeze agents. Do not add chlorides or admixtures containing greater than 0.2 percent chlorides to the mortar, per TMS MSJC.

d. Prevent mortar from staining the face of the masonry or other exposed surfaces. Immediately remove mortar that comes in contact with such surfaces. Cover partially completed work when work is not in progress. Protect sills, ledges and projections from mortar droppings. Building damage resulting from work of this Section is the Contractor's responsibility. Restore damaged areas to the satisfaction of the Owner at no expense to the Owner. Do not apply products under conditions outside product manufacturer's requirements.

1.9 WARRANTY

1.9.1 Cleaning Warranty

Warrant cleaning procedures for a period of two years against harm to substrate (masonry and mortar) or to adjacent materials including, but not limited to discoloration of substrate from improper procedures or usage, chemical damage from inadequate rinse procedures, and abrasive damage from improper procedures.

1.9.2 Repair Warranty

Warrant repair procedures, including pointing, for a period of two years against: discoloration or mismatch of new mortar to adjacent original historic mortar, discoloration or damage to masonry from improper mortar clean-up, loss of bond between masonry and mortar, fracturing of masonry edges from improper mortar joint preparation procedures or improper mortar formulation, and occurrence of efflorescence from improper repair procedures.

PART 2 PRODUCTS

2.1 CLEANING MATERIALS

2.1.1 General Requirements

Selection of appropriate cleaning products requires a clear understanding of the masonry materials to be cleaned, a rationale for the cleaning, and an understanding of the anticipated level of cleanliness expected from the

SECTION 04 03 00 Page 13 cleaning program. Overly aggressive cleaning methods and materials can cause subtle, long-term damage to masonry units. Use products that have a minimum 5 year performance record on relevant projects. Select the products predicated on long-term negative effects to the masonry rather than current level of cleanliness of the comparable structure.

2.1.2 Chemical Cleaners

a. Provide commercially available products that have a proven record of cleaning masonry without altering, damaging or discoloring the masonry units, mortar or surrounding materials. Use cleaners that are specifically formulated for use on the substrate to be cleaned.

b. Provide the associated pre and post treatment material to neutralize the long term effects of the chemicals.

c. Acceptable Limestone Cleaners include:

1. Sure Klean Light Duty Restoration Cleaner, manufactured by ProSoCo, Inc., 3741 Greenway Circle, Lawrence, KS 66046, Tel:

(800) 255-4255, Fax: (785) 830-9797

2. ABR BW3 Blue Gel, manufactured by ABR Products, Inc., 9720 South 60th Street, Franklin, WI 53121, Tel: (800) 346-7532.

3. Sure Klean 766 Limestone and Masonry Prewash, followed by Limestone and Masonry Afterwash, manufactured by ProSoCo, Inc., 3741 Greenway Circle, Lawrence, KS 66046, Tel: (800) 255-4255, Fax: (785) 830-9797

4. Safe 'n Easy Architectural Cleaner, manufactured by Dumond Chemicals, 1475 Phoenixville Pike, Suite 18, West Chester, PA 19380, Tel: (800) 245-1191

5. Safe 'n Easy Limestone Cleaner, manufactured by Dumond Chemicals,Inc., 1475 Phoenixville Pike, Suite 18, West Chester, PA 19380, Tel: (800) 245-1191.

6. MasonRE B All Purpose Cleaner, manufactured by Cathedral Stone Products, 7266 Park Circle Drive, Hanover, MD 21076, Tel: (800) 684-0901.

7. MasonRE B+ Advanced Multi-Surface Cleaner, manufactured by Cathedral Stone Products, 7266 Park Circle Drive, Hanover, MD 21076, Tel: (800) 684-0901.

8. Or approved equal

2.1.3 Biological Growth Removers

a. Use biological growth removers that are chemical treatments designed to remove organic growth from masonry. Provide any associated post-treatment materials, as required, to neutralize the long-term effects of the chemicals.

b. Acceptable Biological Growth Removers include:

1. D/2 Biological Solution, available from Limeworks.us, PO Box 151, Milford Square, PA 18935, Tel: (215) 536-6706, Fax: (215) 536-2281

2. EnviroKlean ReKlaim, manufactured by ProSoCo, Inc., 3741 Greenway Circle, Lawrence, KS 66046, Tel: (800) 255-4255, Fax: (785) 830-9797

3. EnviroKlean ReVive, manufactured by ProSoCo, Inc., 3741 Greenway Circle, Lawrence, KS 66046, Tel: (800) 255-4255, Fax: (785) 830-9797

4. Or approved equal.

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2.1.4 Iron Stair Removers

a. Provide chemical cleaners specifically designed to solubilize and remove iron stains from a variety of masonry surfaces.

b. Acceptable products include:

1. Safe 'n Easy Masonry Rust Remover, manufactured by Dumond Chemicals, Inc., 83 General Warren Boulevard, Suite 190, Malvern, PA 19355, Tel: (800) 245-1191, Fax: (609) 655-7725

2. MasonRE Light Duty Rust Remover, manufactured by: Cathedral Stone Products, 7266 Park Circle Drive, Hanover, MD 21076, Tel: (800) 684-0901.

3. Or approved equal.

2.1.5 Liquid Strippable Masking Agent

Provide manufacturer's standard liquid, film-forming, strippable masking material for protecting glass, metal, and polished stone surfaces from the damaging effect of acidic and alkaline masonry cleaners.

2.1.6 Cleaning Implements

Furnish brushes that contain natural or nylon fiber bristles only. Do not use metallic wire brushes. Use scrapers and application paddles made of wood with rounded edges. Metallic tools are not permitted.

2.1.7 Water

Obtain potable water from a local source. Filter to remove minerals resulting in a neutral pH, prior to application.

2.2 REPAIR MATERIALS

2.2.1 General

Use repair materials of one type and from one source, when used in repair treatments that will have surfaces exposed in the finished structure.

2.2.2 Mortar and Stucco

2.2.2.1 Testing and Matching

a. Take test specimens of existing mortar from a sound and intact representative portion of the structure, at locations indicated by the Contracting Officer's Representative and assess in accordance with ASTM C1713 and ASTM C1324.

b. Aggregate Analysis

(1) Separate aggregate of the mortar sample from the binder by taking the crushed mortar sample and chemically separating the aggregate from the binder.

(2) Rinse the separated aggregate clean with water and dry. Examine the aggregate with a magnifying glass, and record the component materials as to range of materials, sizes, colors, as well as the presence of other materials.

SECTION 04 03 00 Page 15

(3) Perform sand analysis using a sieve analysis of the aggregate as part of the ASTM C1324 process.

c. Match the replacement mortar to the original existing material in color, texture and tooling.

2.2.2.2 Replacement Mortar

Provide replacement mortar that will:

a. Coexist with the old in a sympathetic, supportive and, if necessary, sacrificial capacity.

b. Have greater vapor permeability and be softer (measured in compressive strength) than the masonry units.

(1) Measure water vapor transmission in accordance with ASTM E96/E96M.

(2) Prepare ASTM E96/E96M water vapor transmission specimens with thickness similar to that expected in service, or a maximum of 1/2 inch, whichever is thinner.

c. Be as vapor permeable, and as soft, or softer, (measured in compressive strength) than the existing historic mortar or stucco.

2.2.2.3 Binder Content

Provide binder type or mixture of mortar with a cement, lime, or combination thereof consistent with the original existing mortar content in order to provide uniform durability, weathering characteristics, and the same, or better, life-cycle performance expectations.

2.2.2.4 Pointing Mortar

Pre-blend pointing mortar in single containers in a factory-controlled environment. Pointing mortar may be site mixed, Type N. Use lime for repointing mortar that conforms to ASTM C207.

2.2.2.5 Admixtures

Do not use admixtures in the mortar unless specifically approved in writing by the Contracting Officer.

2.2.3 Replacement Masonry Materials

2.2.3.1 Glazed Clay Brick

a. Provide replacement brick matching color, shape, size, texture, appearance, and thermal expansion properties of the existing historic brick.

b. Test brick in comparison to the original existing brick using

ASTM C67/C67M.

c. Do not use reclaimed brick unless approved by Contracting Officer.

d. New Glazed Brick shall comply with ASTM C1405 - 12 Standard specification for Glazed Brick (single file brick units).

SECTION 04 03 00 Page 16

2.2.3.2 Stone

a. Provide replacement stone matching type, color, shape, size, texture, finish-profile, and compressive strength of the existing historic stone units.

b. Test replacement stone in comparison to the existing historic stone using ASTM C170/C170M.

c. New granite must comply with ASTM C615/C615M; Standard Specification for Granite Dimension Stone.

d. New limestone must comply with ASTM C568/C568M Standard Specification for Limestone Dimension Stone.

2.2.3.3 Masonry Elements

2.2.3.3.1 Anchors and Accessories

a. Provide anchors of type and size required to support stone Dutchmen and stone installations. Anchors shall be Stainless Steel, AISI Type 302 or 304.

b. Provide hardwood, slate, or plastic shims, non-staining to stone, sized to suit joint thickness and bed depths.

c. Rods/Pins: Stainless steel threaded rods sized for each type of repair for stone Dutchmen or reattachment of pieces where necessary.

2.2.3.3.2 Lead Flashing

Lead flashing conforming to GSA HPTP 07656-01 shall be a commercially available product designed for installation in mortar joints to help protect against water infiltration.

2.2.4 Adhesives

a. Akepox 5000, epoxy based stone adhesive, UV stable, knife grade, by:

Akemi, (US Contact) INNOCHEM innovative Chemicals, 4030 Pleasantdale Road, Suite F, Doraville, GA 30340 Tel: (770) 409-8789 or (877) G0-AKEMI.

b. Sikadur 31, Hi-Mod Gel as manufactured by Sika Corporation, 201 Polito Avenue, Lyndhurst, NJ 07071 Tel: (800) 933-SIKA.

c. Or approved equal.

2.2.5 Miscellaneous Materials

2.2.5.1 Cementitious Grout

Use cementitious grout, recommended by the manufacturer for the application, to bond steel anchors to masonry.

2.2.5.2 Metal Attachments

a. Provide threaded or deformed stainless steel anchors for spall

SECTION 04 03 00 Page 17 repairs, size as indicated.

b. Provide other plates, angles, anchors, and embedments conforming to ASTM A36/A36M, prime painted with inorganic zinc primer.

2.3 EQUIPMENT

2.3.1 Cleaning Equipment

Provide cleaning equipment that does not cause staining, erosion, marring, or other damage or changes in the appearance of the surfaces to be cleaned.

2.3.1.1 Sandblasting

Use of sandblasting equipment is not allowed for cleaning masonry surfaces.

2.3.1.2 Water Blasting

a. Use of water blasting equipment is not allowed for cleaning masonry surfaces.

2.3.1.3 Cleaning Implements

a. Furnish application and scrub brushes that contain natural or nylon fiber bristle only. Do not use wire brushes.

b. Scrapers and application paddles shall be made of wood or plastic.

Metallic tools are not permitted.

c. Full-range pH testing strips are required to ensure the proper removal and rinsing of cleaners.

2.3.2 Spray Equipment

a. Provide spray equipment for chemical cleaners with low-pressure tanks or chemical pumps suitable for chemical cleaner indicated, and equipped with stainless steel, cone-shaped spray-tip.

b. Disperse water through a fan-shaped spray tip at an angle of not less than 15 degrees.

c. Deliver water at a pressure not greater than 400 psi and at a volume between 2.5 and 3 gpm.

d. Deliver heated water at flow rates indicated maintaining between 140 and 180 degrees F.

2.3.2.1 Grout Injection Implements

Provide syringes or other tools to inject grout into cracks.

2.3.2.2 Tools

a. Hand tools shall be used unless there is prior written approval of tool types, locations and mechanics by the Contracting Officer.

b. Use of rotary grinders, power saws, power chisels, or any other power tools will be permitted only with prior written approval of tool types, locations, and specific mechanics by the Contracting Officer.

SECTION 04 03 00 Page 18

If mechanical grinders are approved for cutting the joints, the blade must be no larger than four (4) inches in diameter.

c. Chisels shall be narrower that the joints in which they are used.

d. Brushes for cleaning areas to be replaced shall be stiff, natural or nylon bristle brushes.

e. Drilling Equipment

1. Use standard small, powered, handheld masonry drills, commonly used for drilling small holes in concrete and masonry to drill holes in masonry for patch anchors and other applications.

2. Use drills in rotary mode only. Do not use impact type drills.

2.3.3 Compressed Air Supplies

a. Use compressed air equipment that delivers clean, oil and moisture free compressed air at the surface to be cleaned. Use a minimum of two in-line air filters to remove oil and moisture from the air supply.

b. Test the compressed air supply during each shift for the presence of oil and moisture.

2.3.4 Material Handling and Associated Equipment

2.3.4.1 Mixing, Transporting, and Placing Job Materials

a. Provide equipment used for mixing, transporting, placing, and confining masonry and mortar placements capable of satisfactorily mixing material and supporting uninterrupted placement operations.

b. Provide equipment used for mixing, conveying, and placing of materials that is clean, free of old materials and contaminants, and in conformance with material manufacturer's recommendations.

2.3.4.2 Associated Equipment

Provide associated equipment, such as mixer timing equipment, valves, pressure gauges, pressure hoses, other hardware, and tools, as required to ensure a continuous supply of material and operation control.

2.4 Mortar Mix

2.4.1 General

a. Proportion materials appropriately with regard to the effect of moisture content on the individual components (cement, sand and lime).

b. Batch materials using volumetric measurement devices and consistently consolidate the material in these devices to ensure the uniformity of the mortar. Do not batch by shovel counts.

2.4.2 Batching

a. Utilize a calibrated measuring device for batching Portland cement.

b. Utilize a calibrated measuring device for batching hydrated lime or lime putty.

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c. Utilize a calibrated measuring device for batching the sand.

2.4.3 Cement and Lime Proportions

a. Fill the measuring device with portland cement, hydrated lime or lime putty.

b. Briskly strike the bottom of the measuring device against the ground a minimum of ten times and then strike the top flush.

c. For dry hydrate lime, fill the measuring device using a minimum of three lifts, strike the bottom of the measuring device against the ground a minimum of ten times for each lift and then strike the top flush. Mix dry hydrate lime to a wet paste that is 40 to 42 percent solid.

d. For lime putty briskly strike the bottom of the measuring device against the ground a minimum of ten times and then strike the top flush. No additional lime is required when measuring from putty.

2.4.4 Sand Proportions

a. Proportion sand when the sand is in saturated surface dry (SSD), loose damp condition.

b. Proportion the sand by filling a measuring device using a minimum of three lifts, striking the sides a minimum of ten times, and then striking the top flush.

PART 3 EXECUTION

3.1 EXAMINATION

a. Contractor shall examine substrates, supports and conditions under which this work is to be performed and notify the Contracting Officer, in writing, of conditions detrimental to the proper completion of the work. Do not proceed with work until unsatisfactory conditions are corrected. Beginning work signifies installer's acceptance of substrates and conditions.

b. Use the gentlest means to perform the work and take the greatest of care to ensure that the historic materials are not damaged in the process of the work, as established by mock-ups and testing.

c. In addition to requirements in this Section, comply with NPS Hist Prop.

3.1.1 Taking and Preparation of Samples

a. Take and analyze samples of unweathered original historic mortar and different types of mortar in the structure in order to match the new mortar to be used for pointing.

b. Remove three or four samples of each type of mortar to be matched with a hand chisel from several locations on the building. Mortar samples to be intact pieces with a minimum size of 1 ounce.

c. Set aside the largest sample for comparison with the pointing mortar.

SECTION 04 03 00 Page 20

d. Place the remaining samples in labeled, sealed sample bags for transport to the laboratory for evaluation per Part 2 of this Specification.

3.2 PREPARATION

3.2.1 Protection

a. Protect persons, motor vehicles, adjacent surfaces, surrounding buildings, equipment, and landscape materials from chemicals used and runoff from cleaning operations.

b. Erect temporary protection covers, which will remain in operation during the course of the work, over pedestrian walkways and at personnel and vehicular points of entrance and exit.

c. Protect the interior of buildings from the weather, cleaning, and repair operations at all times.

d. Do not expose workers to chemical substances in excess of the limits established by ACGIH 0100 . Comply with more stringent regulations where applicable.

3.2.2 Surface Preparation

a. Do not proceed with cleaning until mock-ups have been approved.

b. Do not proceed with pointing until existing mortar has been analyzed and suitable repair material has been determined.

c. Do not proceed with restoration work until the cause of observed distresses have been identified and corrected.

d. Use products in accordance with manufacturer's instructions

3.2.3 Equipment and Techniques Demonstration

a. Demonstrate equipment and techniques of operation in an approved location.

b. Assemble dependable and…