COUNTY OF ORANGE

OC COMMUNITY RESOURCES

INVITATION FOR BID (IFB)

FOR

HISTORIC PRESERVATION MAINTENANCE

IFB NO. 012-2708502-ME

County of Orange IFB

OC Community Resources - Historic Preservation Maintenance, 012-2708502-ME

County of Orange

OC Community Resources

Procurement Services

601 NORTH ROSS ST

SANTA ANA, CA

92701

SCHEDULE OF ACTIVITIES

Release Project Date November 5, 2024

Question Submission Deadline November 19, 2024, 2:00pm

Bid Submission Deadline December 5, 2024, 2:00pm

**This is a proposed schedule that is subject to change. Any changes to the schedule for the RFP process will be issued to all Respondents via addenda on the County’s online bidding system https://procurement.opengov.com/portal/ocgov **

PROPOSALS MUST BE RECEIVED ON

OR BEFORE

Thursday, December 5, 2024

2:00 pm https://procurement.opengov.com/portal/ocgov

SECTIONS

SECTION 1. SUMMARY

SECTION 2. SCOPE OF WORK

SECTION 3. PRICING

SECTION 4. VENDOR QUESTIONNAIRE

SECTION 5. GENERAL INFORMATION

SECTION 6. GENERAL INSTRUCTIONS

SECTION 7. W-9/W-8 REQUIREMENTS

SECTION 8. ELECTRONIC FUND TRANSFER (EFT)

SECTION 9. OCLSB AND DVBE PREFERENCE POLICIES CERTIFICATION

REQUIREMENTS

Attachments:

A - Model Contract

SECTION 1. SUMMARY

The County of Orange, OC Community Resources, (hereinafter referred to as County) is requesting competitive bids from qualified vendors (hereinafter referred to as Bidder) for

Historic Preservation Maintenance. The awarded Contract, (hereinafter referred to as Contract) will be between the County and awarded Bidder, (hereinafter referred to as Contractor) in accordance with the model contract terms, conditions and scope of work. This is a fully electronic solicitation – only electronic bids submitted through the County’s online bidding system will be allowed; no other form of bid submittals will be accepted. Prior to submitting a bid, Bidders are advised to carefully read the instructions below, including the model contract and any solicitation attachments and/or exhibits.

SECTION 2. SCOPE OF WORK

2.1 SCOPE OF WORK.

I. INTRODUCTION

This contract is for Historical Preservation Maintenance at various locations and facilities throughout the County of Orange that are not a public project as defined in Public Contract Code, Section 22002(c).

The primary objective is to protect the historical integrity of the historical facilities and sites while performing necessary repairs to ensure their functionality and safety. All maintenance and repairs must comply with the Secretary of the Interior’s Standards for the Treatment of Historic Properties (https://www.nps.gov/orgs/1739/secretary-standards-treatment-historic-properties.htm). Contractor shall furnish all staffing, labor, equipment, materials and incidentals required for Historical Preservation Maintenance.

II. DEFINITIONS

A. Contractor Performance Evaluation: Evaluation to be completed by County department after each project completed by Contractor. Evaluations will be sent to the assigned buyer at County and be utilized to monitor performance issues.

B. Consolidate: To strengthen loose or deteriorated materials in place.

C. Dismantle: To disassemble or detach a historic item from a surface, or a no historic item from a historic surface, using gentle methods and equipment to prevent damage to historic items and surfaces; disposing of items unless indicated to be salvaged or reinstalled.

D. Historic: Spaces, areas, rooms, surfaces, materials, finishes, and overall appearance that are important to the successful rehabilitation as determined by Architect. Designated historic spaces are indicated in the Historic Treatment Schedule.

E. Match: To blend with adjacent construction and manifest no apparent difference in material type, species, cut, form, detail, color, grain, texture, or finish; as approved by Architect.

https://www.nps.gov/orgs/1739/secretary-standards-treatment-historic-properties.htm

F. Maintenance Work: Maintenance work in this Contract consists exclusively of: routine, recurring, and usual work for the preservation or protection of any County owned or operated facility for its intended purpose; minor repainting; resurfacing of streets and highways at less than one inch;

servicing of irrigation and sprinkler systems; and work performed to keep, operate and maintain

County owned water, power, or waste disposal systems, including, but not limited to, dams, reservoirs, powerplants, and electrical transmission lines of 230,000 volts and higher.

G. Refinish: To remove existing finishes to base material and apply new finish to match original, or as otherwise indicated.

H. Reinstall: To protect removed or dismantled item, repair and clean it as indicated for reuse, and reinstall it in original position, or where indicated.

I. Remove: To take down or detach a no historic item located within a historic space, area, or room, using methods and equipment to prevent damage to historic items and surfaces; disposing of items unless indicated to be salvaged or reinstalled.

I. Repair: To correct damage and defects, retaining existing materials, features, and finishes while employing as little new material as possible. This includes patching, piecing-in, splicing, consolidating, or otherwise reinforcing or upgrading materials.

K. Replace: To remove, duplicate, and reinstall entire item with new material. The original item is the pattern for creating duplicates unless otherwise indicated.

L. Replicate: To reproduce in exact detail, materials, and finish unless otherwise indicated.

M. Reproduce: To fabricate a new item, accurate in detail to the original, and from either the same or a similar material as the original, unless otherwise indicated.

N. Restore: To consolidate, replicate, reproduce, repair, and refinish as required to achieve the indicated results.

O. Retain: To keep existing items that are not to be removed or dismantled.

P. Reversible: New construction work, treatments, or processes that can be removed or undone in the future without damaging historic materials unless otherwise indicated.

Q. Salvage: To protect removed or dismantled items and deliver them to Owner.

R. Stabilize: To provide structural reinforcement of unsafe or deteriorated items while maintaining the essential form as it exists at present; also, to reestablish a weather-resistant enclosure.

S. Strip: To remove existing finish down to base material unless otherwise indicated.

T. Specialized Equipment Rental: Heavy equipment, such as a scissor lift or boom lift that requires rental services.

U. Work Authorization: Project(s) must be reviewed/approved by County department Project

Manager/Coordinator. Project(s) shall include Contractor information, project details, description, materials, rentals, project classifications and approvals.

III. ADDITIONAL DEFINITIONS

A. ASB – Asbestos Certification – No contractor shall engage in asbestos-related work, as defined in

Section 6501.8 of the Labor Code, which involved 100 square feet or more of surface area of asbestos containing materials, unless the qualifier for the license passes an asbestos certification examination. Additional updated certification examination shall be made by Contractors’ State

License Board, in consultation with the Division of Occupational Safety and Health in the

Department of Industrial Relations and the State Department of Health Services. No asbestos certification examination shall be required for contractors involved with the installation, maintenance, and repair of asbestos cement pipe or sheets, vinyl asbestos floor materials, or asbestos bituminous or resinous materials.

B. Carpentry – Requires C5/C6 License

1. Cabinet, Millwork and Finish Carpentry Contractor (C-6) –Makes cabinets, cases, sashes, door, trims, nonbearing partitions and other items of “finish carpentry” by cutting, surfacing, joining, gluing and fabricating wood or other products to provide a functional surface. This contractor also places, erects, and finishes such cabinets and millwork in structures.

2. Framing and Rough Carpentry Contractor (C-5) – Performs any form work, framing or rough carpentry necessary to construct frames structures; installs or repairs individual components of framing systems and performs any rough carpentry or associated work, including but not limited to the construction or installation of: sub-flooring, siding, exterior staircases and railings, overhead doors, roof decking, truss members, and sheathing.

C. Carpentry Helper - Works directly with skilled Journeyman Carpenter in carrying out assigned construction and maintenance carpentry tasks.

D. Ceramic and Mosaic Tile Contractor – Requires a C54 License. Prepares surfaces as necessary and installs glazed wall, ceramic, mosaic, quarry, paver, faience, glass mosaic and stone tiles thin tile that resembles full brick, natural or simulated stone slabs for bathtubs, showers and horizontal surfaces inside of buildings, or any tile units set in the traditional or innovative tile methods, excluded hollow or structural partition tile.

E. Concrete Contractor – Requires C8 License. Forms, pours, places, finishes and installs specified mass, pavement, flat and other concrete work; and places and sets screeds for pavements or flatwork. This class shall not include contractors whose sole contracting business is the application of plaster coatings or the placing and erecting of steel or bars for the reinforcing of mass, pavement, flat and other concrete work.

F. Laborer – Works directly with skilled craft workers in carrying out assigned maintenance and repair tasks.

G. Drywall Contractor – Requires C9 License. Lays out and installs gypsum wall board assemblies including nonstructural metal framing members, and performs the taping and texturing operations including the application of compounds that adhere to wall board to produce a continuous smooth or textured surface.

H. Electrical Contractor- Requires C10 License. Places, erects or connects any electrical wires, fixtures, appliances, apparatus, raceways, conduits, solar photovoltaic cells or any part thereof, which generate, transmit, transform or utilize electrical energy in any form or for any purpose.

I. Electrician Helper - Works directly with skilled Electrician in carrying out assigned construction and maintenance electrician tasks.

J. Fencing Contractor – Requires C13 License. Constructs, erects, alters, or repairs all types of fences, corrals, runs, railing, cribs, game court enclosures, guard rails and barriers, playground game equipment, backstops, posts, flagpoles, and gates, excluding masonry walls.

K. Flooring and Floor Covering Contractor – Requires C15 License. Prepares any surface for the installation of flooring and floor coverings, and installs carpet, resilient sheet goods, resilient tile, wood floors and flooring (including the finishing and repairing thereof), and any other materials established as flooring and floor covering material, except ceramic tile.

L. Glazing Contractor – Requires C17 License. Selects, cuts, assembles all makes and kinds of glass, glass work, mirrored glass, and glass substitute materials for glazing; executes the fabrication and glazing of frames, panels, sashes and doors; and/or installs these items in any structure.

M. HVAC (Warm-Air Heating, Ventilating and Air-Conditioning) Contractor - Requires C20 License.

Maintains services and repairs warm-air heating systems and water heating heat pumps, complete with warm-air appliances; ventilating systems complete with blowers and plenum chambers; air-conditioning systems complete with air-conditioning unit; and the ducts, registers, flues, humidity and thermostatic controls and air filters in connection with any of these systems. This classification shall include warm-air heating, ventilating and air-conditioning systems which utilize solar energy.

N. Insulation and Acoustical Contractor – Requires C2 License. Replaces any insulating media and preformed architectural acoustical materials for the purpose of temperature and/or sound control.

O. Lock and Security Equipment Contractor* – Requires C28 License. Evaluates, sets-up, installs, and repairs all doors and door assemblies, gates, locks and locking devices, panic and fire rated exit devices, manual and automatic operated gate and door closures and releases, jail and prison locking devices and permanently installed or build in safes and vaults. *This classification shall only be utilized in conjunction with other general construction trades during the course of this Contract.

P. Masonry Contractor – Requires C29 License. Installs concrete units and baked clay products;

concrete, glass and clay block; natural and manufactured stone; terra cotta; and fire brick or other material for refractory work. This classification includes the fabrication and installation of masonry component units for structural load bearing and non-load bearing walls for structures and fences installed with or without mortar; ceramic veneer (not tile) and thin brick that resembles full brick for facing; paving; and clear waterproofing, cleaning and caulking incidental to masonry construction.

Q. Painting and Decorating Contractor – Requires C33 License. Prepares by scraping, sandblasting or other means and applies any of the following: painting, papers, textures, fabrics, pigments, oils, turpentines, japans, driers, thinners, varnishes, shellacs, stains, fillers, waxes, adhesives, water and any other vehicles, mediums and materials which adhere by evaporation and may be mixed, used and applied to the surfaces of structures and the appurtenances thereto for purposes of decorating, protecting, fireproofing and waterproofing.

R. Plumbing Contractor – Requires C36 License. Provides a means for a supply of safe water, ample in volume and of suitable temperature for the purpose intended and the proper disposal of fluid waste from the premises in all structures and fixed works. These classifications include but are not limited to:

A. Complete removal of waste from the premises or the construction and connection of on-site disposal systems;

B. Piping, storage tanks and venting for a safe and adequate supply of gases and liquids for any purpose, including vacuum, compressed air and gases for medical, dental and commercial and industrial uses;

C. All gas appliances, flues and gas connections for all systems including suspended space heating units. This does not include forced warm air units;

D. Water and gas piping from the property owner’s side of the utility meter to the structure or fixed works;

E. Installation of any type of equipment to heat water, or fluids, to a temperature suitable for the purposes listed in this section, including the installation of solar equipment for this purpose;

and

F. The maintenance and replacement of all items described above and all health and safety devices such as, but not limited to, gas earthquake valves, gas control valves, back flow preventers, water conditioning equipment and regulating valves.

S. Refrigeration Contractor – Requires C38 License. Constructs, fabricates, erects, installs, maintains services and repairs refrigerated rooms, and insulated refrigerated spaces, temperature insulation, air-conditioning units, ducts, blowers, registers, humidity and thermostatic controls for the control of air, liquid, and/or gas temperatures below fifty degrees Fahrenheit (50), or ten degrees Celsius

(10).

T. Roofing Contractor – Requires C39 License. Installs products and repairs surfaces that seal, waterproof, and weatherproof structures. This work is performed to prevent water or its derivatives, compounds or solids from penetrating such protection and gaining access to material or space beyond. In the course of this work, the contractor examines and/or prepares surfaces and uses the following material: asphalt, pitch, tar, felt, glass fabric, urethane foam, metal roofing systems, flax, shakes, shingles, roof tile, slate or any other roofing, waterproofing, weatherproofing or membrane materials(s) or a combination thereof.

U. Solar Contractor – Requires C46 License. A solar contractor installs, modifies, maintains, and repairs thermal, photovoltaic solar energy systems.

V. Welding Contractor – Requires C60 License. Causes metals to become permanently attached, joined and fabricated by the use of gases and electrical energy, which creates temperatures of sufficient heat to perform this work.

III. CONTRACTOR RESPONSIBILITIES

A. Contractor shall provide Historical Preservation Maintenance that do not constitute a public project as defined in Public Contract Code, Section 22002(c), as requested by County.

B. All maintenance and repairs must comply with the Secretary of the Interior’s Standards for the Treatment of Historic Properties (https://www.nps.gov/orgs/1739/secretary-standards-treatment-historic-properties.htm).

D. Contractor shall perform all the work including supervision, administration services, supplies, tools, routine equipment, permits, work drawings, transportation, coordination of all subcontractors, tests, inspections, and other services that are necessary and/or appropriate for the finishing, equipping and functioning of the facilities and structures, together with all additional, collateral and incidental work and services required for completion of the work.

E. Services shall be provided on an as-needed basis as required by OC Parks

F. Work includes, but is not limited to:

• Building Roof Maintenance: Repairs using historically accurate materials and techniques or best preservation standards.

• Exterior Maintenance: Repairs to siding, masonry, stairs, windows, and other elements, focusing on preserving historic features.

• Interior Maintenance: Wall plastering, woodwork, and painting using historically appropriate methods and materials.

• Glass and Window Maintenance: Repairs to maintain original design and functionality.

• Floor Refinishing: Preserving the historic character of floors.

• Ironwork Maintenance: Repairs to gates, railings, and fencing, ensuring functionality and aesthetic coherence.

• Stucco Wall Maintenance: Repairs using materials and techniques that match the existing fabric.

• Exhibit Display Cabinetry Maintenance: Repairs prioritizing the preservation of historic details while ensuring functionality.

G. Contractor shall arrive at the project site as scheduled.

H. Contractor shall ensure that all the facilities are kept in good operating order and that downtime is minimized.

I. Contractor shall maintain a telephone answering system, which, at a minimum, provides eight (8) hour a day, five (5) weekday live coverage, and ensures the ability to contact higher management for evening and weekend projects.

J. Contractor shall respond to all requests for non-emergency service within twenty-four (24) hours or next business days of the service request.

K. Contractor shall provide and maintain a telephone answering system with a twenty-four (24) hour, seven-day per week service capable of contacting and dispatching service personnel.

L. Contractor shall respond to all emergency requests for service within one (1) hour unless a longer response time is specified.

M. Contractor’s staff shall consist of experienced and licensed personnel at all times.

N. All work shall be performed in a skillful and workmanlike manner. All services shall be performed in accordance with the most current codes, and all applicable trade, federal, state and local laws, ordinances, rules and regulations, including but not limited to laws applicable to the services at the time services are provided to and accepted by County.

O. Contractor shall warrant all labor, equipment, parts and materials incorporated into this work for a period of one (1) year from the date of acceptance.

P. Contractors and its subcontractors assigned to a particular job shall have current licenses in their respective trades, crafts, or professions by the state of California or local authority that require licenses in those jurisdictions.

Q. As part of the work, Contractor shall furnish and assume full responsibility for everything required for orderly progress and proper execution and completion of the work, whether temporary or permanent and whether or not incorporate into the work including, but not limited to, materials, equipment, labor, transportation, construction equipment and machinery, tools, appliances, fuel, power, light, heat, transportation, telephone, water, sanitary facilities, temporary facilities, utilities and all other facilities and incidentals.

R. Any drawings, survey data, reports, studies, specifications, estimates, maps, computations, and other documents required to be prepared by Contractor for the project shall be the property of

County.

S. Contractor and its subcontractors shall maintain for a minimum of four (4) years after the completion of the Contract, adequate books, records and supporting documents to verify the amounts, recipients and uses of all disbursements of funds passing in conjunction with the Contract.

T. County and Contractor discussions regarding contract or performance related issues under this

Contract are not billable hours.

IV. PROJECT MEETINGS FOR HISTORIC TREATMENT

A. Historic Treatment Conference: Before starting historic treatment work, conduct conference at

Project site.

i. Attendees: In addition to representatives of Owner and Contractor, historic treatment specialists, and installers whose work interfaces with or affects historic treatment shall be represented at the meeting.

ii. Agenda: Discuss items of significance that could affect progress of historic treatment work, including review of the following:

I. Fire-prevention plan.

II. Governing regulations.

III. Areas where existing conditions is to remain and the required protection.

IV. Shoring of historic fabric during installation of foundations and structural work.

V. Contractor survey to verify quantities and locations of historic repairs.

VI. Hauling routes.

VII. Sequence of historic treatment work operations.

VIII. Storage, protection, and accounting for salvaged and specially fabricated items.

IX. Existing conditions, staging, and structural loading limitations of areas where materials are stored.

X. Qualifications of personnel assigned to historic treatment work and assigned duties.

XI. Requirements for extent and quality of work, tolerances, and required clearances.

XII. Methods and procedures related to historic treatments, including product manufacturers' written instructions and precautions regarding historic treatment procedures and their effects on materials, components, and vegetation.

XIII. Embedded work such as flashings and lintels, special details, collection of wastes, protection of occupants and the public, and condition of other construction that affect the Work or will affect the work.

XIV. Reporting: Record conference results and distribute copies to everyone in attendance and to others affected by decisions or actions resulting from conference.

B. Coordination Meetings: Conduct coordination meetings specifically for historic treatment work at regular intervals as work proceeds. Coordination meetings shall be held in conjunction with regularly scheduled owner-architect-contractor meetings.

A. Attendees: In addition to representatives of Owner, Architect, and Contractor, each historic treatment specialist, supplier, installer, and other entity concerned with progress or involved in planning, coordination, or performance of historic treatment work activities shall be represented at these meetings. All participants at conference shall be familiar with Project and authorized to conclude matters relating to historic treatment work.

B. Agenda: Review and correct or approve minutes of previous coordination meeting. Review other items of significance that could affect progress of historic treatment work. Include topics for discussion as appropriate to status of Project.

I. Review present and future needs of each entity present, including review items listed in the "Preliminary Historic Treatment Conference" Paragraph above and the following:

A. Interface requirements of historic treatment work with other Project Work.

B. Status of submittals for historic treatment work.

C. Access to historic treatment work.

D. Effectiveness of fire-prevention plan.

E. Quality and work standards of historic treatment work.

F. Change Orders for historic treatment work.

C. Reporting: Record meeting results and distribute copies to everyone in attendance and to others affected by decisions or actions resulting from each meeting.

V. MATERIALS OWNERSHIP

A. Historic items, relics, and similar objects including, but not limited to, cornerstones and their contents, commemorative plaques and tablets, antiques, and other items of interest or value to

Owner that may be encountered or uncovered during the Work, regardless of whether they were previously documented, remain Owner's property.

A. Carefully dismantle and salvage each item or object and protect it from damage, then promptly deliver it to Owner where directed.

VI. INFORMATIONAL SUBMITTALS

A. Preconstruction Documentation: Show preexisting conditions of adjoining construction and site improvements, including finish surfaces, that might be misconstrued as damage caused by

Contractor's historic treatment operations.

B. Historic Treatment Program: Submit 10 days before work begins. Include shoring plan and protection plan for wallpaper and other historic features and finishes.

C. Survey of historic wood single-wall and historic wood windows and doors to confirm scope and quantity allowances provided in the contract documents.

D. Fire-Prevention Plan: Submit 10 days before work begins.

VII. QUALITY ASSURANCE

A. Historic Treatment Specialist Qualifications: An experienced firm regularly engaged in historic treatments similar in nature, materials, design, and extent to this work as specified in each section and that has completed a minimum of five recent projects with a record of successful in- service performance that demonstrates the firm's qualifications to perform this work.

a. Field Supervisor Qualifications: Full-time supervisors experienced in historic treatment work similar in nature, material, design, and extent to that indicated for this Project.

Supervisors shall be on Project site when historic treatment work begins and during its progress. Supervisors shall not be changed during Project except for causes beyond the control of the specialist firm.

B. Historic Treatment Program: Prepare a written plan for historic treatment for whole Project, including each phase or process and protection of surrounding materials during operations. Describe in detail the materials, methods, and equipment to be used for each phase of work. Show compliance with indicated methods and procedures specified in this and other Sections. Coordinate this whole-Project historic treatment program with specific requirements of programs required in other historic treatment

Sections.

C. Fire-Prevention Plan: The site is located in a wooded canyon susceptible to fire. Prepare a written plan for preventing fires during the Work, including placement of fire extinguishers, fire blankets, rag buckets, and other fire-prevention devices during each phase or process. Coordinate plan with Owner's fire-protection equipment and requirements.

D. Safety and Health Standard: Comply with ANSI/ASSE A10.6.

D. Mockups: Prepare mockups of historic treatment repair processes to demonstrate aesthetic effects, to set quality standards for materials and execution, and to set quality standards for fabrication and installation. Prepare mockups so they are inconspicuous.

D. Wood-Repair-Material Manufacturer Qualifications: A firm regularly engaged in producing wood consolidate and wood-patching compound that have been used for similar historic wood- treatment applications with successful results, and with factory-authorized service representatives who are available for consultation, Project-site inspection, and on-site assistance.

IX. STORAGE AND HANDLING OF HISTORIC MATERIALS

A. Salvaged Historic Materials:

i. Clean loose dirt and debris from salvaged historic items unless more extensive cleaning is indicated.

ii. Pack or crate items after cleaning; cushion against damage during handling. Label contents of containers.

iii. Store items in a secure area until delivery to Owner.

iv. Transport items to Owner's storage area designated by Owner.

v. Protect items from damage during transport and storage.

2. Historic Materials for Reinstallation:

i. Repair and clean historic items for reuse as indicated.

ii. Pack or crate items after cleaning and repairing; cushion against damage during handling. Label contents of containers.

iii. Protect items from damage during transport and storage.

iv. Reinstall items in locations indicated. Comply with installation requirements for new materials and equipment unless otherwise indicated. Provide connections, supports, and miscellaneous materials to make item functional for use indicated.

3. Existing Historic Materials to Remain: Protect repair indicated to remain against damage and soiling from construction work. Where permitted by Architect, items may be dismantled and taken to a suitable, protected storage location during repair work and reinstalled in their original locations after historic treatment and repair work in the vicinity is complete.

4. Storage Space:

i. Owner will arrange for limited on-site location(s) for free storage of historic material.

X. PROTECTION, GENERAL

A. Protect persons, motor vehicles, surrounding surfaces of building, building site, plants, and surrounding buildings from harm resulting from historic treatment procedures.

i. Use only proven protection methods, appropriate to each area and surface being protected.

ii. Provide temporary barricades, barriers, and directional signage to exclude the public from areas where historic treatment work is being performed.

iii. Erect temporary barriers to form and maintain fire-egress routes.

iv. Contain dust and debris generated by historic treatment work and prevent it from reaching the public or adjacent surfaces.

v. Provide shoring, bracing, and supports as necessary. Do not overload structural elements.

vi. Protect floors and other surfaces along hauling routes from damage, wear, and staining.

2. Temporary Protection of Historic Materials:

i. Protect existing historic materials with temporary protections and construction. Do not remove existing materials unless otherwise indicated.

ii. Do not attach temporary protection to historic surfaces except as indicated as part of the historic treatment program and approved by Owner.

B. Comply with each product manufacturer's written instructions for protections and precautions.

Protect against adverse effects of products and procedures on people and adjacent materials, components, and vegetation.

C. Protect existing interior flooring during repair period with covering of heavy kraft paper or other suitable material. Do not use plastic sheet or film that might cause condensation. Do not move heavy and sharp objects directly over kraft-paper-covered interior flooring. Protect flooring with plywood or hardboard panels to prevent damage from storing or moving objects over flooring.

D. Utility and Communications Services:

i. Notify Owner, authorities having jurisdiction, and entities owning or controlling wires, conduits, pipes, and other services affected by historic treatment work before commencing operations.

ii. Disconnect and cap pipes and services as required by authorities having jurisdiction, as required for historic treatment work.

iii. Maintain existing services unless otherwise indicated; keep in service, and protect against damage during operations. Provide temporary services during interruptions to existing utilities.

XI. PROTECTION FROM FIRE

A. General: Follow fire-prevention plan and the following:

i. Comply with NFPA 241 requirements unless otherwise indicated.

ii. Remove and keep area free of combustibles, including rubbish, paper, waste, and chemicals, unless necessary for the immediate work.

A. If combustible material cannot be removed, provide fire blankets to cover such materials.

i. Prohibit smoking by all persons within Project work and staging areas except where specifically designated for smoking.

B. Heat-Generating Equipment and Combustible Materials: Comply with the following procedures while performing work with heat-generating equipment or combustible materials, including welding, torch-cutting, soldering, brazing, removing paint with heat, or other operations where open flames or implements using high heat or combustible solvents and chemicals are anticipated:

i. Obtain Owner's approval for operations involving use of open-flame or welding or other high-heat equipment. Notify Owner at least 72 hours before each occurrence, indicating location of such work.

ii. Do not perform work with heat-generating equipment in or near rooms or in areas where flammable liquids or explosive vapors are present or thought to be present. Use a combustible gas indicator test to ensure that the area is safe.

iii. Use fireproof baffles to prevent flames, sparks, hot gases, or other high-temperature material from reaching surrounding combustible material.

iv. Prevent the spread of sparks and particles of hot metal through open windows, doors, holes, and cracks in floors, walls, ceilings, roofs, and other openings.

v. Fire Watch: Before working with heat-generating equipment or combustible materials, station personnel to serve as a fire watch at each location where such work is performed. Fire-watch personnel shall have the authority to enforce fire safety. Station fire watch according to NFPA 51B, NFPA

241, and as follows:

Have fire-watch personnel perform final fire-safety inspection each day after conclusion of work at Project site to detect hidden or smoldering fires and to ensure that proper fire prevention is maintained.

C. Fire Extinguishers, Fire Blankets, and Rag Buckets: Maintain fire extinguishers, fire blankets, and rag buckets for disposal of rags with combustible liquids. Maintain each as suitable for the type of fire risk in each work area. Ensure that nearby personnel and the fire-watch personnel are trained in fire-extinguisher and blanket use.

XII. GENERAL HISTORIC TREATMENT

A. Have historic treatment work performed only by qualified historic treatment specialists.

B. Ensure that supervisory personnel are present when historic treatment work begins and during its progress.

C. Record existing work before each procedure (preconstruction), and record progress during the work. Use digital preconstruction documentation photographs.

D. Perform surveys of Project Site as the Work progresses to detect hazards resulting from historic treatment procedures.

E. Follow the procedures in subparagraphs below and procedures approved in historic treatment program unless otherwise indicated:

i. Retain as much existing material as possible; repair and consolidate rather than replace.

ii. Use additional material or structure to reinforce, strengthen, prop, tie, and support existing material or structure.

iii. Use reversible processes wherever possible.

iv. Use historically accurate repair and replacement materials and techniques unless otherwise indicated.

F. Notify Owner of visible changes in the integrity of material or components whether from environmental causes including biological attack, UV degradation, freezing, or thawing or from structural defects including cracks, movement, or distortion.

i. Do not proceed with the work in question until directed by Owner.

G. Where missing features are indicated to be repaired or replaced, provide work with appearance based on accurate duplications rather than on conjecture, subject to approval of Owner.

H. Where work requires existing features to be removed or dismantled and reinstalled, perform these operations without damage to the material itself, to adjacent materials, or to the substrate.

I. Identify new and replacement materials and features with permanent marks hidden in the completed

Work to distinguish them from original materials. Record a legend of identification marks and the locations of the items on record drawings.

XIII. SELECTIVE DEMOLITION, GENERAL

A. General: Demolish and remove existing conditions only to the extent required for the work. Use methods required to complete the Work within limitations of governing regulations and as follows:

i. Proceed with selective demolition systematically, from higher to lower level. Complete selective demolition operations above each floor or tier before disturbing supporting members on the next lower level.

ii. Neatly cut openings and holes plumb, square, and true to dimensions required. Use cutting methods least likely to damage construction to remain or adjoining construction. Use hand tools or small power tools designed for sawing or grinding, not hammering and chopping. Temporarily cover openings to remain.

iii. Cut or drill from the exposed or finished side into concealed surfaces to avoid marring existing finished surfaces.

iv. Do not use cutting torches until work area is cleared of flammable materials. At concealed spaces, such as duct and pipe interiors, verify condition and contents of hidden space before starting flame-cutting operations. Maintain portable fire-suppression devices during flame-cutting operations.

v. Maintain adequate ventilation when using cutting torches.

vi. Remove decayed, vermin-infested, or otherwise dangerous or unsuitable materials and promptly dispose of off-site.

vii. Remove structural framing members and lower to ground by method suitable to avoid free fall and to prevent ground impact or dust generation.

viii. Locate selective demolition equipment and remove debris and materials so as not to impose excessive loads on supporting walls, floors, or framing.

ix. Dispose of demolished items and materials promptly.

B. Site Access and Temporary Controls: Conduct selective demolition and debris-removal operations to ensure minimum interference with roads, streets, walks, walkways, and other adjacent occupied and used facilities.

C. Removed and Reinstalled Items:

i. Clean and repair items to functional condition adequate for intended reuse.

ii. Reinstall items in locations indicated. Comply with installation requirements for new materials and equipment. Provide connections, supports, and miscellaneous materials necessary to make item functional for use indicated.

XIV. DISPOSAL OF DEMOLISHED MATERIALS

A. Remove demolition waste materials from Project site and dispose of them in an EPA-approved construction and demolition waste landfill acceptable to authorities having jurisdiction.

i. Do not allow demolished materials to accumulate on-site.

ii. Remove and transport debris in a manner that will prevent spillage on adjacent surfaces and areas.

B. Burning: Do not burn demolished materials.

XV. HISTORICAL PROTECTION, REMOVAL AND DISMANTLING

A. Have protection work performed by a qualified protection specialist.

B. Install protection completely before beginning demolition anywhere in the building.

a. Where protection is required, survey existing surfaces and conditions before fabricating protection. Cut and configure protection so that it conforms to the shape of historic structure and protects complete floor surface and wall surfaces.

b. Provide protection of building structure, finishes, systems and attached cabinetry and other assemblies, including display cases, wall surfaces, posts, trusses, and ceilings, as required based on construction means, methods and sequencing chosen to execute the Work.

B. Perform work according to the historic treatment program.

a. Protect historic wallpaper and linen walls finishes and fireplace surround and mantle for the duration of construction. The intent is to have a conservator work on the historic wallpaper following construction.

b. Do not install protection so that any material other than fiberboard, polyethylene sheeting, film or neoprene padding or foam is in contact with historic materials. Provide contact material appropriate to the material being protected.

c. Do not fasten or anchor protection through or into historic materials. Do not install fasteners or hardware on the face of protection materials which is in contact with historic materials.

Remove existing hardware and other extraneous items and materials from historic materials and assemblies before installing protection. After removing hardware, but before installing protection, clean historic materials to remove grit, dust, sand, gum, glass and other materials which could scratch or smudge surface of historic materials.

B. General: Have removal and dismantling work performed by a qualified historic removal and dismantling specialist. Ensure that historic removal and dismantling specialist's field supervisors are present when removal and dismantling work begins and during its progress.

B. Perform work according to the historic treatment program.

i. Perform removal and dismantling to the limits indicated.

ii. Provide supports or reinforcement for existing construction that becomes temporarily weakened by removal and dismantling work, until the Project Work is completed unless otherwise indicated.

iii. Perform cutting by hand or with small power tools wherever possible. Cut holes and slots neatly to size required, with minimum disturbance of adjacent work.

iv. Do not operate air compressors inside building unless approved by Architect in each case.

v. Do not drill or cut columns, beams, joints, girders, structural slabs, or other structural supporting elements, without having Contractor's professional engineer's written approval for each location before such work is begun.

vi. Dispose of removed and dismantled items off-site unless indicated to be salvaged or reinstalled.

B. Unacceptable Equipment: Keep equipment that is not permitted for historic removal or dismantling work away from the vicinity where such work is being performed.

B. Removing and Dismantling Items on or Near Historic Surfaces:

a. Unfasten items in the opposite order from which they were installed.

b. Support each item as it becomes loosened to prevent stress and damage to the historic surface.

c. Dismantle anchorages.

B. Removing Existing wood floor and floor joists:

a. Remove existing wood baseboard and retain for reinstallation.

b. Brace and support single-wall construction and roof framing.

c. Detach single-wall construction wall from floor joists. Coordinate removal work with new foundation so the integrity of the existing single-wall construction is maintained.

d. Remove wood flooring without damaging existing floorboards. Tongue and grooves shall not be cut or damaged during the removal process. Salvage wood floor and prepare for reinstallation.

If distress in structure is apparent during performance of the work, stop removal or dismantling and take immediate precautionary measures to ensure safety of the structure. Inform Architect of the problem, steps taken, and proposed corrective actions.

P. HISTROICAL CONCRETE AND MASONRY CLEANING

A. General Scope: The purpose of the cleaning process is to remove atmospheric deposits, soil, staining, grease, oil, loose paint, paint chalking and other contaminants without damage to or disintegration/etching of the concrete surface.

B. Steam Cleaning: Apply steam to concrete surfaces at the low pressures indicated for each type of masonry. Start at very low pressure and increase as required- not to exceed low pressure limits.

Hold nozzle at least 12 inches (200 mm) from concrete surface, and apply steam in horizontal back-and-forth sweeping motion, overlapping previous strokes to produce uniform coverage.

C. Low-pressure water: If required, undertake cleaning of the top of the concrete bond beam using low- to medium-pressure water to prepare the surface as required for the application of a paint coating. Unless otherwise indicated, hold spray nozzle at least 12 inches (200 mm) from concrete surface, and apply water at the low pressures indicated in horizontal back-and-forth sweeping motion, overlapping previous strokes to produce uniform coverage. Start at low pressure and increase as required- not to exceed medium pressure limits.

XVII. HISTORIC WOOD REPAIR, GENERAL

A. General: In treating historic items, disturb them as minimally as possible and as follows:

i. Stabilize and repair wood to reestablish structural integrity and weather resistance while maintaining the existing form of each item.

ii. Remove coatings and apply borate preservative treatment before repair.

iii. Repair items in place where possible.

iv. Install temporary protective measures to protect wood-treatment work that is indicated to be completed later.

B. Mechanical Abrasion: Where mechanical abrasion is needed for the Work, use only the gentlest mechanical methods, such as scraping and natural-fiber bristle brushing, that will not abrade wood substrate, reducing clarity of detail. Do not use abrasive methods, such as sanding, wire brushing, or power tools, except as approved by Owner.

C. Repair Wood: Match existing materials and features, retaining as much original material as possible to perform repairs.

i. Unless otherwise indicated, repair wood by consolidating, patching, splicing, or otherwise reinforcing wood with new wood matching existing wood or with salvaged, sound, original wood.

ii. Where indicated, repair wood by limited replacement matching existing material.

D. Replace Wood: Where indicated, duplicate and replace units with units made from salvaged, sound, original wood or with new wood matching existing wood. Use surviving prototypes to create patterns for duplicate replacements.

E. Identify removed items with numbering system corresponding to item locations, to ensure reinstallation in same location.

XVIII. HISTORIC TREATMENT OF WOOD UNITS, GENERAL

1. General: In treating historic items, disturb them as minimally as possible and as follows:

i. Stabilize and repair wood doors and windows to reestablish structural integrity and weather resistance while maintaining the existing form of each item.

ii. Remove coatings and apply borate preservative treatment before repair.

iii. Repair items in place where possible.

iv. Install temporary protective measures to protect wood door work that is indicated to be completed later.

2. Mechanical Abrasion: Where mechanical abrasion is needed for the work, use only the gentlest mechanical methods, such as scraping and natural-fiber bristle brushing, that will not abrade wood substrate, reducing clarity of detail. Do not use abrasive methods such as sanding, wire brushing, or power tools except as indicated as part of the historic treatment program and as approved by Owner.

3. Repair and Refinish Existing Hardware: Dismantle door and window hardware; strip paint, repair, and refinish components to match finish Samples; and lubricate moving parts just enough to function smoothly.

4. Repair Wood Doors and Windows: Match existing materials and features, retaining as much original material as possible to perform repairs.

i. Unless otherwise indicated, repair wood doors and windows by consolidating, patching, splicing, or otherwise reinforcing wood with new wood matching existing wood or with salvaged, sound, original wood.

ii. Where indicated, repair wood doors and windows by limited replacement matching existing material.

5. Replace Wood Units: Where indicated, duplicate and replace units with units made from salvaged, sound, original wood or with new wood matching existing wood. Use surviving prototypes to create patterns for duplicate replacements.

i. Do not use substitute materials unless otherwise indicated.

ii. Compatible substitute materials may be used.

6. Protection of Openings: Where doors and windows are indicated for removal, cover resultant openings with temporary enclosures so that openings are weathertight during repair period.

7. Identify removed doors, frames, leaves, sash, and members with numbering system corresponding to door locations to ensure reinstallation in same location. Key doors, leaves, windows, sash, and members to Drawings showing location of each removed unit. Permanently label units in a location that will be concealed after reinstallation.

XIX. HISTORIC TREATMENT OF PLAIN PAINTING, STAIN, AND CLEAR FINISHES

1. Perform historic treatment of paint, stain, and clear finishes in the following sequence, which includes work specified in this and other Sections:

i. Dismantle existing surface-mounted objects and hardware except items indicated to remain in place. Tag items with location identification and protect.

ii. Verify that temporary protections have been installed.

iii. Examine condition of surfaces to be treated.

iv. Remove existing paint, stain, and/or transparent finish to the degree required for each substrate and surface condition of existing paint.

v. Undertake all necessary repairs.

vi. Apply paint system.

vii. Reinstall dismantled surface-mounted objects and hardware unless otherwise indicated.

2. Qualification Data: For historic treatment specialist(s) including field supervisors and workers, and paint-remover manufacturer. Paint removal contractor to be certified and trained by the paint remover manufacturer.

3. Plain Painting Historic Treatment Program: Submit before work begins.

i. Color Matching Certificate: For computer color matching of historic colors.

ii. Preconstruction Test Reports: For cleaning materials, paint removers and paint coatings and systems.

iii. Furnish extra paint materials, from the same production run, that match products applied and that are packaged with protective covering for storage and identified with labels describing contents, including material, finish, source, and location on building.

iv. Quantity: Furnish Owner with an additional 5 percent, but not less than 1 gal. (3.8 L) or one case, as appropriate, of each material and color applied.

D. Quality Assurance:

A. Historic Treatment Specialist Qualifications:

i. A qualified historic painting specialist with expertise in matching and touching up existing painting. Experience only in new painting work is insufficient experience for historic treatment work.

ii. A qualified historic…