B08_-_Attachment_1_Specifications_(PMIS_244067).pdf

CONSERVE THE ROEDER HOUSE

(BLDG. 16/16A) HISTORIC FINISHES

PMIS No. 244067

HARPERS FERRY NATIONAL HISTORICAL PARK

HARPERS FERRY, WV

PROJECT SPECIFICATIONS

NATIONAL PARK SERVICE

JANUARY, 2022

1. PROJECT HISTORY AND EXISTING CONDITIONS

A. BACKGROUND

This project requires performance of architectural conservation treatments for stucco, plaster, paint, wallpaper, graffiti, slating, metal objects and wood floor finish stabilization of selective interior and exterior surfaces found in the National Park Service’s historic Roeder House located in Harpers

Ferry, WV. All work shall be in compliance with the National Historic Preservation Act of 1966.

The Roeder House is located in Harpers Ferry National Historical Park (HAFE), Harpers Ferry, West Virginia. The historic Roeder House is one of the most visible and frequented buildings in the Park showcasing well preserved 19th century vernacular architecture and craftmanship. The

Roeder house is one of the best resources for plaster, stucco, and historic finish interpretation within the Park. Due to moisture infiltration and deferred maintenance, sections of plaster and stucco are friable, blistering, cracking, and subject to loss. These conditions put the historic fabric at risk of being lost if not addressed.

B. EXISTING CONDITIONS

Constructed in multiple phases between 1844 and 1861, the Roeder House building (HAFE Park

Building #16/16A) contains a basement, first floor, second floor, and attic along with front and rear porches. The building currently serves as a Park house museum with a total square footage of

2,505 feet. The conditions vary from states of restoration to disrepair. The basement and first floor have been used by the Park’s interpretation division as exhibit space that depicts 19th century domestic life and the confectionary business once housed in the building. These spaces have been restored to their mid-1800s appearance. The second floor contains two unrestored rooms with deteriorating conditions. The attic space has three walls of historic plaster and finishes in deteriorating condition with minimal intervention in recent years. The Roeder House has two interior staircases, each with historic plaster and finishes in poor condition. The exterior stairway on the rear of the house has historic plaster and finishes in deteriorating condition. In 2002 the

National Park Service stabilized specific areas of the Roeder House interior plaster under the project HAFE PMIS 41556 - Rehabilitate Buildings 5, 7, 16, and 16A and under the supervision of

NPS Conservator Judy Jacob of the NCR. Therefore, portions of the plaster have edges secured and slabs re-attached to lath and masonry. However, there are still portions of plaster and many paint layers that have not received conservation treatment and remain friable, brittle, and loose and thus prone to flaking, cracking, and loss. The wood boards on the second and attic floors and on their related enclosed stair steps are in need of cleaning and treatment to preserve the desiccated wood fibers. Additionally, there is evidence of continued cracking and spalling in select areas of the exterior stucco.

2. PROJECT SPECIFICATIONS

A. DESCRIPTION

Independently, and not as an agent of the Government, the Contractor shall provide all travel labor, materials, equipment, and services necessary to stabilize stucco, plaster, paint, wallpaper, graffiti, slating, metal objects and wood floor finish at Roeder House, Harpers Ferry, WV. Lead paint and lead-in-paint dust are present and shall be managed as part of the stabilization work but lead paint abatement is not included in this Scope of Work. The Contractor shall test the work areas to assess potential levels of lead-based paint. The Contractor shall anticipate encountering residues of lead-containing paint and shall transport and dispose of all removed items containing Lead Base

Paint in compliance with all applicable federal, state, and local laws and regulations for identification, removal, labeling, handling, containerization, transportation, and disposal of lead-containing material. This includes compliance with the EPA Lead-Based Paint Renovation, Repair and Painting (RRP) Rule. Treatment methodologies and additional information are provided in the attached documents: Interior Plaster Condition Assessment and Treatment Recommendations for

Building 16 – Frederick A. Roeder House, Courtney Magill, NPS National Capitol Region

Conservator, May 2022 and HAFE B16 Conservation Drawings 2022, Peter Dessauer, Architect, Harpers Ferry National Historical Park, May 2022.

Specifically, the Scope of Work includes:

1) Site and Staging: Protections for site, personnel, building and historic fabric; Barricades and Signs; Access and Egress; Parking and Deliveries; Storage of Materials; Work Areas;

Daily Cleanup and Debris Removal.

2) Field Inspection (including visual and sounding) of the work areas to verify existing conditions, and treatment specifications of historic finish areas consisting of existing stucco, plasters, paint and limewash layers, graffiti, metal objects, wallpaper remnants, wood floors, and wood stair treads and risers.

3) The Contractor shall be responsible for verifying quantities identified below and in the

Interior Plaster Condition Assessment and Treatment Recommendations Report. If there is a variance in quantities either under or over 10% of the identified quantities, the Contractor shall be responsible for implementing specified treatment.

4) Plaster Stabilization

a. Ceiling Plaster Stabilization

i. Consolidate Plaster: Stabilization of base coats through injection, brush, or spray application of consolidant. Approximately 75 sq. ft.

ii. Raise/Re-Adhere Distorted Plaster: Raising distorted and displaced plaster into intended plane and application of adhesive to re-adhere plaster to substrate. Approximately 50 sq. ft.

b. Wall Plaster Stabilization

iii. Loss of Key, Severely Cracked or Bulging Wall Plaster: Stabilization of wall base coats through injection, brush, or spray application of consolidant. Returning plaster to intended plane and application of adhesive to re-adhere plaster to substrate. Approximately 175 sq. ft.

iv. Cracked, Chipped or Crumbling Wall Plaster, Missing Finish or Brown

Coats: Stabilization of loose and deteriorated wall plaster through application of consolidant. Patching and filling areas using traditional three-coat plaster system. Approximately 175 sq. ft.

c. Miscellaneous Plaster Stabilization

i. Re-adhere loose plaster fragments – Re-adhere loose plaster fragments and blend to surrounding plaster. Approximately 5 sq. ft.

ii. Plaster crack repairs – Prepare and fill cracks with injection grout.

Approximately 75 linear ft.

5) Limewash Coating and Paint Stabilization – Stabilization of paint on plaster finish through application of consolidant. Approximately 500 square ft.

6) Wallpaper Stabilization – Stabilization of wallpaper remnants through application of consolidant. Less than 1 square ft.

7) Stucco Stabilization – Stabilization of stucco edges, cracks, voids, gaps, and spalls on the northwest and southwest exterior elevations as directed in the Architectural Conservation

Report and as indicated on drawings. Approximately 80 square ft.

8) Treatment to clean and conserve the existing wood floors and enclosed wood stair risers and treads. There are approximately 1160 existing square feet of interior wood floors and related stairwell wood steps (treads and risers) for special cleaning treatment: i.e. to include attic floor, northwest stairwell, second floor, and southwest stairwell

3. REGULATIONS

All work shall conform to the requirements of the U. S. Environmental Protection Agency (EPA), U. S. Department of Labor – Occupational Safety and Health Administration (OSHA), National

Institute of Occupational Safety and Health (NIOSH), as well as state and local codes and regulations.

4. PRODUCTS AND MATERIALS

A. GENERAL

1) Plaster Match: The new plaster shall match the existing in depth, color and texture and have compatible workability, strength and moisture resistance.

2) The Contractor shall submit cured plaster and stucco and mortar mix samples for inspection and approval before starting work.

3) Consolidation method/material shall be determined from consolidation mock-ups for inspection and approval before starting work.

4) The Contractor shall employ hand tools for conservation, cleaning, and masonry work to achieve the proper and matching historic preservation appearances. Limited use of machine tools shall be permitted as per the approved Contractor Work Plan and with

Contracting Officer’s approval.

5) Compatibility:

a. Plaster repair systems shall include products proven to be compatible with other repair techniques and existing materials.

b. Compatibility of Options: If Contractor is given option of selecting between two or more products for use on Project, product selected shall be compatible with products previously selected, even if previously selected products were also options.

c. Materials shall be manufactured by one of the manufacturers listed herein; or approved equal.

d. Grade and Quality: Materials shall conform to requirements of this Section and shall be new, free from defects, and of recent manufacture.

e. Manufacturer’s Instructions: Comply with material manufacturers’ instructions for use of products including surface preparation, mixing, applying, drying, curing, temperatures, protections, etc. Comply with manufacturer's written instructions for precautions and effects of products and procedures on adjacent building materials, components, and vegetation.

B. DELIVERY, STORAGE AND HANDLING

1) Deliver all products, clearly labeled, to project site in manufacturer’s undamaged and unopened containers.

2) Comply with manufacturer’s published instructions for handling and storage.

3) Keep all containers dry and in protected areas.

4) Keep materials covered and out of direct sunlight.

5) Store products in locations agreed-upon by the Contracting Officer.

C. PLASTER & STUCCO PRODUCTS

1) Lime:

a. Hydrated, ASTM C 206, Type S.

2) Natural Hydraulic Lime: Shall be NHL 3.5, 2 EN459-1-2010, for a strength between 500

- 700 PSI, as provided by the following sources; or approved equal.

a. Edison Coatings Inc.

b. PA Lime Works.

c. U.S. Heritage Group, Inc.

d. CONPROCO.

3) Sand: ASTM C 144: Natural Sand. Match the size, color, texture, and gradation of existing mortar sand. Use a well-graded sharp sand #6 (3.5mm) or smaller, a fine silica sand #20-#200 (0.8 to 0.075mm)

4) Water: Potable, non-staining and free of oils, acids, alkalis, and organic matter.

5) Lath:

a. Wood: Matching joinery and dimensions.

b. Metal: Flat diamond mesh type 316 stainless steel.

e. Anchorages:

i. Wood lath: 3d x 1-1/4” 316 stainless steel nails

ii. Metal lath: As approved by the lath manufacturer of type and size to suit application and to rigidly secure lathing materials and compatible with plaster materials.

6) Plaster and Stucco Reinforcing

a. Glass fiber mesh or cut strands

b. Hemp reinforcing fiber

c. Clean animal hair

d. Cellulose fiber material or other material which could stain or leach color into the plaster and finished paint shall not be used.

7) Plaster Washers: Perforated discs designed for temporary fastening of loose plaster to lath during bonding repair activities.

8) Mineral Pigments: Natural, water soluble, as required to match finish coat plaster colors.

9) Retardants: Plaster retardant agents, as approved by COR.

10) Other Products: As approved by COR.

D. ADHESIVES/BONDING AGENTS:

1) Acrylic adhesive mixture-Morgan Phillips formula:

a. 3 parts Rhoplex MC-76

b. 1 part Rhoplex 1950

c. 1 part Type S hydrated lime

d. 1part microballoons

e. 1 part fluid petroleum coke

f. 20 percent Acrysol ASE-60 by volume of the dispersion formulation)

2) AD Premixed: Plain Face Plaster Lug and Key Replacement, Historic Plaster

Conservation Services

3) Approved equal

E. CONSOLIDANTS:

1) Conservare OH100, Prosoco

2) Paraloid B-72

3) Paraloid B-67

4) Rhoplex MC-76

5) CaLoSiL E 25

6) Approved equal

F. INJECTIONS:

1) Plaster and stucco match of approved finish coats

2) Dispersed Hydrated Lime Injection Mortar

3) Paraloid B-72

4) Inert Glass Micro Balloons (20 – 200 microns)

5) Fumed Silica

G. SOLVENTS: Dependent upon products and finishes approved.

1) Methanol

2) Mineral Spirits

3) Acetone

4) Denatured Alcohol

H. MORTAR

1) Lime: Hydrated Lime: ASTM C 206, Type S.

2) Natural Hydraulic Lime - Dolomitic: NHL 3.5, EN459-1-2010; or, approved equal.

3) NHL SOURCES: As provided by the following sources or approved equal:

a. Edison Coatings Inc.

b. PA Lime Works

c. CONPROCO

4) Sand: ASTM C144: Provide natural sand; of color necessary to produce required mortar color. The sand shall be Fredericksburg Concrete Sand from Shenandoah Sand & Gravel

Inc. in Winchester, Virginia; or approved equal. Natural Sand shall match the size, color, texture, and gradation of existing mortar sand.

5) Water: Clean, clear, and potable. Non-staining and free of oils, acids, alkalis, and organic matter.

6) Mortar Mix: For both setting and pointing of stone and brick shall be:

a. 1 Part Natural Hydraulic Lime (NHL)

b. 2 and ½ Parts Natural Sand

I. WOOD FLOOR & WOOD STEP CLEANING MATERIALS

1) 0.4oz Orvus Paste dissolved into 128oz of warm water.

2) Use 0.1:32 ratio of Orvus Paste to warm water

3) Soft Bristle Brushes

4) Warm water (100% H2O) wipe to remove any residue

J. FUNGICIDES AND MILDEWCIDES:

1) D/2 Architectural Biocide

2) Approved equal

K. CLEANING AGENTS:

Products recommended by material manufacturers and as approved by the COR.

5. STABILIZATION TREATMENT PROCEDURES

The principal aim of stabilization work is to halt the process of deterioration and stabilize the item's condition, to sustain the integrity of the historic element, feature, or structure. Cyclic maintenance is often required as well as repair work. Repair is required where specifically indicated. The Contractor shall adhere to the following procedures:

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

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

3) Use reversible processes wherever possible.

4) Use traditional replacement materials and techniques if possible.

Historic finishes: The interior of the Roeder House contains generous amounts of original historic fabric in the form of paint, plaster, graffiti, wallpaper, wood trim, framing, bricks, hearths, floors, trims, baseboards, and other finishes, which indicate all phases of its historic occupation. If treatment activities reveal unique or undocumented historic resources, contact the COR who will communicate with the Park. The Park will identify and potentially document the resources and, if necessary, develop an appropriate mitigation plan. If the Park determines the resources are to be documented or mitigated, the Contractor shall relocate work and submit a Time Impact Analysis identifying impact of project schedule.

B. PRELIMINARY SURFACE CLEANING

Prior to performing and staging or protective measure installation, remove all paint chips and dust found on floors and other horizontal surfaces using a High Efficiency Particulate Air

(HEPA) vacuum.

C. PREPARATION FOR STABILIZATION WORK

1) Protection: Install measures to protect room features and materials to remain against damage and soiling during stabilization treatment. When permitted by COR, items may be removed to a suitable, protected storage location during and cleaned and reinstalled in their original locations after stabilization treatment operations are complete. Attachments of temporary protection to existing construction shall be approved by COR prior to installation.

2) Staging: Provide, install, and maintain staging and access to heights in rooms, which shall meet OSHA standards, shall be installed in approved locations, and with weight so distributed as to not adversely affect the existing historic floor framing and floorboards.

3) Inspection: The Contactor shall survey the existing conditions prior to commencement of work to verify the scope of work description, dimensions, schedules, and quantities.

Review findings with COR.

6. STABILIZATION TREATMENTS

1) Applications and results will match approved samples and mockups as per COR reviews and inspections.

2) Provide ventilation for the drying and curing of plaster and stabilization repairs during and subsequent to applications.

3) Environmental Requirements:

a. Anticipate and observe environmental conditions (temperature, humidity, and moisture) within limits recommended by manufacturers for optimum results. Do not install products under environmental conditions outside manufacturer’s absolute limits.

b. Do not apply plaster unless a minimum uniform temperature of 55 degrees Fahrenheit has been and continues to be maintained in the workspace for a minimum of seven days prior to plaster application, during plastering, and for a minimum of seven days after plaster is dry.

4) Provide protection of the stabilization work in progress to prevent deterioration and damage during the remainder of the construction period.

5) Make repairs according to approved work plans and the Interior Plaster Condition

Assessment and Treatment Recommendations Report.

B. CLEAN SURFACES BEFORE CONSERVATION TREATMENTS

1) The Contactor shall clean surfaces before conservation treatments. Cleaning shall be performed in an approved and careful manner as not to damage the existing fabric. The purpose of cleaning shall be to remove all dirt, debris, and biological growth from the surfaces of finishes for conservation in the project scope of work.

2) Where a Prewash is used, recommend no more than 40 PSI. Provide protections for delicate surfaces and for proper drying after prewash.

3) The Contractor shall avoid damage to the fabric designated for architectural conservation

4) The Contractor shall follow manufacturer's directions for safe use of biocides/mildewcides/fungicides.

5) Allow washed surfaces to dry before application of the conservation and painting.

6) Allow COR inspections and approval of prewashed and biocide techniques and methods.

C. CEILING PLASTER STABILIZATION

1) Consolidate Plaster:

a. Based upon test results and agreement by the NPS COR, consolidate areas of friable and crumbling plaster and allow treatment to cure.

b. Inject small cracks and voids with approved injection.

c. Use a plastic pipette or syringe with a small needle to apply the consolidation material to the crumbling and friable plaster. Protect the adjacent plaster from drips or overages. Allow the treatment to cure and reapply as needed.

2) Raise-Re-Adhere Distorted Plaster

a. Remove surface soiling from deteriorated plaster that is severely cracked or bulging using a soft nylon bristle brush and carefully brush away dirt and debris.

If there are open cracks or voids in the locations to be treated, remove the debris from within the crack without widening the crack or loosening the plaster surrounding the crack.

b. Install temporary supports using plastic washers, shoring (with padding), and fasteners, as needed to support and lift areas of displaced plaster.

c. Inject the cracks adjacent to the repair location following the Plaster Crack

Repairs procedures. If needed, add micro balloons to the injection material.

d. Carefully remove unstable plaster that has detached from its lath.

e. Document each fragment and create a numbered layout of re-installation.

f. Clean exposed lath with stiff brush and apply a 10 percent solution of Paraloid-

B-67 dissolved in mineral spirits.

g. Clean plaster sections and consolidate brown coat backs. Cure overnight.

h. Brush a thick coat of adhesive onto both the backside of the plaster and the underside of the wood lath.

i. Install loose pieces of plaster in original location and support areas with temporary padded shoring.

j. Allow repaired area to cure for 24 hours.

k. Once the loose plaster is secured, identify areas that require injection and consolidate friable areas.

l. Access the keyed side of the plaster, either from above or by drilling small holes through the plaster face. Inject or spray an aerosol mixture of the consolidant until areas are completely coated, but not oversaturated. Drill holes should be carefully considered to limit the amount of damage to the plaster/stucco surface and should be filled upon completion.

m. Allow areas to dry for 24 hours.

n. Prior to injecting the adhesive, wet each hole with a 5 percent solution of the adhesive using a spray bottle. Apply the injectable adhesive in the existing port holes and let cure. If a commercial product is used, follow the manufacturer’s recommendations for the application of adhesive. After the mixture has set, patch the port holes using the finish coat plaster mix, tinted to match adjacent finish plaster.

o. Re-key detached plaster by injecting an approved adhesive mixture.

p. After the bonding mixture sets, remove temporary supports, and inspect repair areas to ensure plaster has been stabilized and re-keyed.

D. WALL PLASTER STABILIZATION

1) Loss of Key, Severely Cracked or Bulging Wall Plaster:

a. Remove surface soiling from deteriorated plaster that is severely cracked or bulging using a soft nylon bristle brush and carefully brush away dirt and debris.

If there are open cracks or voids in the locations to be treated, remove the debris from within the crack without widening the crack or loosening the plaster surrounding the crack. Using a combination of fasteners and shoring, support and lift areas of displaced plaster.

b. Install temporary supports using plastic washers, shoring (with padding), and fasteners, as needed to support and lift areas of displaced plaster.

c. Inject the cracks adjacent to the repair location following the Plaster Cracks

Repairs procedures. If needed, add micro balloons to the injection material.

d. Carefully remove unstable plaster that has detached from its lath.

e. Document each fragment and create a numbered layout of re-installation.

f. Clean exposed lath with stiff brush and apply a 10 percent solution of Paraloid B-

67 dissolved in mineral spirits.

g. Clean plaster sections and consolidate brown coat backs. Cure overnight.

h. Brush a thick coat of adhesive onto both the backside of the plaster and the underside of the wood lath.

i. Install loose pieces of plaster in its original location and support areas with temporary padded shoring.

j. Allow repaired area to cure for 24 hours.

k. Once the loose plaster is secured, identify areas that require injection and consolidate friable areas.

l. Access the keyed side of the plaster, either from above or by drilling small holes through the plaster face. Inject or spray an aerosol mixture of the consolidant until areas are completely coated, but not oversaturated.

m. Allow areas to dry for 24 hours.

n. Prior to injecting the adhesive, wet each hole with a 5 percent solution of the adhesive using a spray bottle. Apply the injectable adhesive in the existing port holes and let cure. If a commercial product is used, follow the manufacturer’s recommendations for the application of adhesive. After the mixture has set, patch the port holes using the finish coat plaster mix, tinted to match adjacent finish plaster.

o. Re-key detached plaster by injecting an approved adhesive mixture.

p. After the bonding mixture sets, remove temporary supports and inspect repair areas to ensure plaster has been stabilized and re-keyed and patch the port holes using the finish coat plaster mix.

2) Cracked, Chipped or Crumbling Wall Plaster:

a. Consolidate areas of friable and crumbling plaster and allow treatment to cure.

a. Inject cracks larger than hairline and voids with acrylic or lime-based grouts.

Smooth the injection material to conform to the surrounding surfaces.

E. MISCELLANEOUS PLASTER STABILIZATION

1) Re-Adhere Loose Plaster Fragments

2) If plaster fragments are loose and able to be reattached, they should be removed from the lath beneath.

3) Document each fragment and create a numbered layout of re-installation.

4) Clean exposed lath with stiff brush and apply a 10 percent solution of Paraloid B-

67 dissolved in mineral spirits.

5) Clean plaster sections and consolidate brown coat backs. Cure overnight.

6) Brush a thick coat of adhesive onto both the backside of the plaster and the underside of the wood lath.

7) Install loose pieces of plaster in its original location and support areas with temporary padded shoring.

8) The cracks/voids around the reinstalled plaster fragment should be injected with the finish coat mix, tinted to match adjacent finish plaster.

2) Plaster Crack Repairs

a. If existing, and possible, remove paper tape using cotton swabs and water.

b. Fill all cracks in the plaster greater than hairline.

c. For small cracks and voids, remove all debris from within the crack without widening the crack or loosening the plaster surrounding the crack.

d. Apply bonding agent to surfaces within the crack.

e. Fill crack fully with approved finish plaster mix, tinted to match adjacent finish plaster.

f. Smooth the injection material to conform to the surrounding surfaces.

F. FINISH STABILIZATION

1) Limewash and Paint Stabilization

a. Use a HEPA vacuum or a soft, natural bristle brush to remove surface soiling.

b. Use a plastic pipette, syringe with a small needle, or fine artists brush to apply approved consolidant or adhesive to limewash coatings and paint, protecting adjacent plaster and surfaces from drips or overages.

c. Allow the treatment to cure and reapply as needed.

2) Wallpaper Stabilization

a. Use a HEPA vacuum or a soft, natural bristle brush to remove surface soiling.

b. Apply approved conservation adhesive to flaking wallpaper, protecting adjacent surfaces from drips or overages.

c. Allow the treatment to cure and reapply as needed.

3) Graffiti Stabilization

a. No stabilization treatments required.

b. Protect areas during other conservation work.

4) Metallic Elements

a. Leave metallic elements in place.

b. Lightly clean and paint with an approved rust converter or a corrosion inhibitor coating.

G. STUCCO STABILIZATION

1) Clean and consolidate areas where indicated in the Interior Plaster Condition Assessment and Treatment Recommendations Plan before repair work.

2) Remove all loose deteriorated stucco to a sound base and provide proper key for the new work.

3) Apply and cure stucco to match approved samples and mockups

4) Apply stucco when ambient temperature is greater than 55 degree F.

5) Finish patch 1/8 inch below surface level with the surrounding plaster and stucco. Do not feather edges of new stucco over old. Sand to smooth and to match the contours of the adjacent plaster and stucco.

6) Keep stucco damp to ensure a slow cure without shrinkage. Cracking within the patch or at the edges will be unacceptable. Unacceptable patches will be removed and replaced at the direction of the COR.

7) Stucco Crack Repairs

a. Fill all cracks in stucco greater than a hairline.

b. For small cracks and voids, remove all debris from within the crack without widening the crack or loosening the stucco surrounding the crack.

c. Apply bonding agent to surfaces within the crack.

d. Fill crack fully with approved finish stucco mix, tinted to match adjacent finish plaster.

H. WOOD STABILIZATION

1) Wood stabilization will clean the surfaces of the floors and stairwell steps and treat the fabric to restore fibers for proper preservation and sustainability. Utilize methods of approved samples.

2) Remove all dirt, plaster spots, dust accumulations, and mildews off the wood surfaces as part of the cleaning process.

3) Remove paint spots on wood surfaces within limits to avoid damaging wood grains and wood surfaces.

4) Protect and Preserve shadow lines and shadow colorations on the wood floors which are evidence of past historic use. Cleaning methods shall not erase or damage this evidence

a. Use 0.1:32 ratio of Orvus Paste to warm water for cleaning treatment.

b. Apply gentle Hand Brush Application for Cleaning: Initial soft bristle brush scrub with the Orvus/water solution.

c. Apply Warm water (100% H2O) wipe to remove any residue.

7. TIME FOR COMPLETION AND CONSTRUCTION PERIOD WORK SCHEDULE

The period of performance for completion of all work is April 2023 to July 2023.

Work shall be generally performed during normal business working hours of 8:00 a.m. to 4:30 p.m., Monday through Friday, excluding holidays. Specific work hours will be established at the

Pre-Construction Conference. Work outside of these days and/or hours, and on Federal holidays, must be approved in advance by the CO. Requests to the CO must be made in writing at least

72hours prior to the proposed date outside of normal hours.

The following holidays and special events should be recognized as no working days: New Year’s

Day, Martin Luther King Jr.’s Birthday, Presidents’ Day, the extended weekend of Memorial

Day, Juneteenth, Independence Day, Labor Day, Columbus Day, Veterans’ Day, Thanksgiving

Day, and Christmas Day.

8. TEMPORARY SERVICES

A. Electric: The Contractor may use electrical service at the Roeder House. Coordinate with COR.

B. Water: Water for construction is available from the Park. Coordinate use with COR. Potable water is not available on site. Furnish cool, potable water for construction personnel in locations convenient to work stations.

C. Telephone: No telephone service is available on site for Contractor's use. Make arrangements and pay all costs for telephone facilities.

D. Sanitary Facilities: The Contractor shall be permitted to use the Public Visitor Restrooms in

Lower Town located on the first floor of Building 44, 735 Shenandoah Street, Harpers Ferry, West Virginia.

9. SAFETY

A. The Work Areas shall be maintained in a clean and safe condition at all times. The

Contractor shall, with the use of barricades, ropes, signs, or audible signals, take all necessary precautions for the protection of the work and safety of staff and the public. Any accident or incident, in regards to the work under this contract, shall be reported immediately, in writing, to the CO.

B. Reportable Accidents: A reportable accident is defined as death, occupational disease, traumatic injury to employees or the public, property damage by accident in excess of $100, and fires. Notify CO immediately in the event of a reportable accident. Within 7 days of a reportable accident, fill out and forward to CO an Accident/Property Damage Report (Form

CM-22). Form may be obtained from the CO.

C. All Other Accidents: The Contractor shall report all other accidents to the CO as soon as possible and assist the CO and other officials as required in the investigation of the accident.

D. Conduct daily jobsite safety inspections: Report any corrections made on the project daily log.

E. As a minimum, conduct weekly 15-minute "toolbox" safety meetings. These meetings shall be conducted by a foreman or supervisor and attended by all construction personnel at the worksite. Document and submit meeting minutes, including a copy of the signoff sheet for each meeting, to the COR within one day of the meeting.

F. Site Safety and Health Officer (SSHO)

1) Provide a Safety oversight team that includes a minimum of one (1) person to function as the Site Safety and Health Officer (SSHO). The SSHO or an equally qualified Designated

Representative/alternate shall be at the work site at all times to implement and administer the Contractor's safety program and Government-accepted Accident Prevention Plan.

2) Project Superintendent: The Contractor’s Project Superintendent may serve as the SSHO on this project.

G. Protective Equipment

1) The Contractor shall provide employees with all the personal protective equipment required to safely perform all work activities for the duration of the project. Employees shall be fit tested and trained on the PPE as applicable.

2) Contractor to inspect personal protective equipment daily and maintain in a serviceable condition.

H. First Aid Facilities

Provide adequate facilities for the number of employees and appropriate to the hazards associated with the types of ongoing construction work at the site.

10. FIRE AND LIFE SAFETY

A. Provide temporary fire protection equipment for the protection of personnel and property during construction.

B. Fire Hazard Stipulation: No welding, grinding, or other activities that could create a spark or fire will be performed on-site without prior notification to the COR/CM. The Contractor shall maintain proper and adequate fire extinguishers.

C. Fire Extinguishers: Portable, with a minimum UL rating of 2-A:10-B:C. Travel distance from any work station to the nearest extinguisher shall not exceed 75 feet.

11. CONDUCT OF OPERATIONS

A. At all times the Contractor shall conduct their operations in conformance with the rules and regulations promulgated by the Secretary of the Interior for the National Park Service, and applicable park rules and regulations prescribed by the National Park System.

B. No signs or advertisements (except those specified herein) shall be displayed on the construction site, unless approved by the Contracting Officer.

C. The contractor is responsible for site cleanliness for the project duration.

D. Parking and Staging of Construction Materials: Parking and staging areas will be identified during the Pre-Construction Conference.

E. Contractor shall use reasonable care and responsibility to protect the site against damages.

The Contractor shall be responsible for the correction of any damage incurred as a result of the performance of the contract. The Contractor shall adequately protect adjacent structures and landscape from damage while performing the required work.

F. The Contractor shall prevent dust and debris from contaminating the building and from entering the building for the duration of the project work.

G. Hauling & traffic restrictions - Contractor shall comply with all legal load restrictions and traffic rules while hauling materials, making deliveries, and driving in the park, and to the job site.

H. The Roeder House will be closed to public view from High Street while the Contractor is working on exterior stucco stabilization. The public will be barricaded from the Contractor staging and work areas.

I. Noise Ordinance of Harpers Ferry: The Contractor shall comply with the Noise Ordinance

Law from the Town of Harpers Ferry, West Virginia.

J. Permits: The Contractor shall obtain any necessary construction permits from the Town of

Harpers Ferry, West Virginia.

K. Radios: No radios allowed on construction site.

L. Smoking is prohibited within fifty feet of any structures and only in designated areas.

13. CLEANUP

A. Remove construction debris, waste materials, packaging material and food waste from the work site daily. No construction debris or waste materials are to be disposed of within Harper’s Ferry

National Historical Park.

B. All removed material that is not to be salvaged becomes the property of the Contractor and shall be disposed of outside the Park.

C. Contractor shall dispose of in accordance with federal, state, and local regulations.

D. Upon completion of all tasks, and prior to Final Inspection, Contractor shall remove all tools and equipment from the site. Any remaining materials shall be accessioned to the Park or disposed. The Contractor shall leave all work areas in a clean, undamaged condition and acceptable to the Contracting Officer. The Contractor shall make all necessary repairs to the buildings and landscape where damages are caused by work.

14. QUALITY REQUIREMENTS:

A. QUALITY ASSURANCE

1) Installer Qualifications: A firm or individuals experienced in installing, erecting, or assembling work similar in material, design, and extent to that indicated for this Project, whose work has resulted in construction with a record of successful in-service performance. Team shall include a Professional Member or Fellow of the American

Institute for Conservation of Historic and Artistic Works (AIC).

2) Manufacturer Qualifications: A firm experienced in manufacturing products or systems similar to those indicated for this Project and with a record of successful in-service performance, as well as sufficient production capacity to produce required units.

B. QUALITY CONTROL

1) Work shall comply with the highest standards of stabilization of historic fabric.

2) The Contractor shall recognize the significance of the historic site and building and shall protect all existing fabric and grounds affected by the work. Any damages to the building fabric and landscape shall be repaired by the contractor at no cost to the government.

3) Repair of existing Stucco and Plaster shall correspond with the characteristic style of adjacent walls and ceilings, with consideration to type, color; coursing, joinery, profiles, and wall coping etc. as per approved mockups and samples of work.

4) Wood Conservation will clean the surfaces and refresh the fibers for proper preservation and sustainability.

5) Contractors Quality Control (CQC) Staff:

a. The Contractor’s Quality Control Supervisor may also perform the duties of

Project Superintendent. The CQC shall be on the project site whenever contract work is in progress.

b. The Contractor's job supervisory staff may be used to assist the Quality Control

Supervisor supplemented, as necessary, by additional certified testing technicians.

c. The Project Superintendent will be held responsible for the quality of work and is subject to removal by the Contracting Officer for non-compliance with the quality requirements specified in the contract.

6) Contractor’s Quality Control Daily Reports:

Daily Reports shall be completed by the Quality Control Supervisor.

15. INSPECTIONS:

A. TREATMENT DETERMINATION:

Prior to performing any testing or executing any mockups, Contractor shall review the conditions of each room, and identify proposed testing and mockups. Contractor shall review and reach consensus with COR. The Historic Preservation Treatment Plan shall be modified to reflect final determinations.

B. TREATMENT OPTIONS: Following treatment testing, the Contractor shall present treatment options to the COR/CM. To include consultation with NPS.

C. INFORMAL INSPECTION:

Informal inspections of project work and the restoration site will be performed by the

COR/CM during the course of the project. To include consultation with NPS.

D. FORMAL INSPECTION:

1) Formal completed work inspections will be in accordance with the Contractor’s Work

Sequence Plan. Formal inspections will be done as Work Tasks are completed in each

Work Area.

2) Formal Inspections will be performed by the Project Superintendent and the COR/CM.

Project work will not progress until formal inspections are completed and COR authorization is given to progress with work.

E. PRODUCT MANUFACTURER:

Product manufacturer inspections shall be performed as necessary to ensure treatments meet the preparation and installation standards.

E. FINAL INSPECTION:

A final inspection of all completed work shall be attended by the Contractor, the CO, and

COR/ CM. This inspection will serve as final determination of all completed contracted work. Final payment will not be made by the NPS without a final inspection resulting in final acceptance of all contracted work.

16. WARRANTY

The Contractor shall furnish to the Government a written guarantee against all defects in materials and workmanship including, without limitation, three (3) years from date of acceptance.

17. MEETINGS

A. PRE-CONSTRUCTION CONFERENCE

Pre-Construction Conference will be scheduled after contract award. The meeting agenda will include the following as a minimum:

1) Park Rules and Regulations

2) Authorized Representatives

3) Correspondence Procedures

4) Submittal of Shop Drawings, Project Data, Samples and Approved Equals

5) Contractor Quality Control

6) Labor Standards Provisions

7) Payroll Reports

8) Payments to Contractor

9) Modifications

10) Construction Schedule

11) Contractor’s Use of Premises

B. WEEKLY PROGRESS MEETINGS:

Weekly Progress Meetings will be conducted by the COR/CM to formally review construction contract status and on-site construction work progress. The COR/CM will provide meeting agendas and minutes. The Project Superintendent will provide weekly updates to the following key agenda items:

1) Recap of work and events incurred during the past week.

2) Projected work to be completed in the 2 weeks ahead.

3) Updates to the Work Sequence Plan and Construction Schedule.

4) Log status review for Submittals, RFIs, and Change Orders.

5) Review of any safety issues and weekly safety meeting topics.

18. SUBMITTALS

1) All material submittals shall be transmitted using National Park Service form CM-16, dated 10/20. No action will be taken on a material submittal item unless accompanied by the transmittal form.

2) Number each submittal consecutively. For re-submittals, use the original submittal number, plus a letter suffix beginning with A. Additional re-submittals of the same item shall contain the original number with the next consecutive letter.

3) Forward submittals to Contracting Officer at least fourteen (14) days before need for approval.

B. PRELIMINARY SUBMITTALS

1) After contract award and prior to the Pre-Construction Conference, the Contractor shall submit for Contracting Officer review and approval, the following:

• Accident Prevention Plan

• Site Use Plan

• Historic Preservation Treatment Plan

• Product Data

• Schedule of Values

• Project Schedule

• Quality Control Plan

• Waste Management Plan

• Qualification Data

a. Accident Prevention Plan (APP)

The Plan shall be written to comply with OSHA and project requirements (a generic plan is not acceptable) including, but not limited to the following:

i. Name and qualifications of responsible supervisor to carry out the program.

ii. Outline of each phase of the work, the hazards associated with each major phase, and the methods proposed to provide for property protection and safety of the public, Government personnel, and

Contractor's employees. Identify the work included under each phase, with a Job Hazard Analysis (JHA)/Job Safety Analysis (JSA), etc.

iii. Planning for possible emergency situations. Such planning shall take into consideration the nature of construction, site conditions, and degree of exposure of persons and property.

iv. Hazard Communication Plan that meets all applicable OSHA regulations.

v. First aid and rescue procedures.

vi. Training, both initial and continuing.

vii. Weekly safety meetings.

viii. Daily site inspections.

ix. Housekeeping

x. Fire Protection.

Once accepted by the Contracting Officer, the APP and attachments will be enforced as part of the contract.

b. Site Use Plan:

i. The Contractor shall prepare a plan to show staging, storage, signs, parking, deliveries; debris removal; scaffold, cleaning; personnel safety, building and landscape protections; stairway use and circulation.

c. Historic Preservation Treatment Plan (HPTP):

Contractor shall prepare a written technical plan for work covering all preservation components of the project. The plan must verify that the construction strategy and the intent is compatible with the Department of

Interior’s Standards for the Treatment of Historic Properties, guidelines for the

Treatment of Cultural Landscapes, and National Park Service management policies for cultural resources. The plan must satisfy both the project scope and resource protection requirements. The plan shall include the following:

i. Organized list of stabilization components of the project, systems, and tasks, including time frames.

ii. Staging and sequence of the work and on-site logistics.

iii. Means and methods, including: identification of compatible materials and techniques, including correction of cracked, bulging, and missing wall and ceiling plaster, stabilization of paint, wallpaper, graffiti, metal objects, slating, wood floor finish, and wood step finish.

iv. Equipment and tools required.

v. Supplies and materials with manufacturer or supplier identified.

vi. Skilled trades and crafts required (qualifications and crew size).

vii. Anticipated testing.

viii. Protective measures: Protection of adjacent surfaces during performance of project tasks.

ix. Limitations on the work, including temperature and humidity conditions.

x. Alternative means if primary treatment method is unfeasible.

xi. Work conducted off-site (Approval from CO required prior to taking resources off-site)

xii. Acknowledgement of Federal, State, and Local regulations and standards required of this project.

d. Product Data

i. Submit manufacturer’s descriptive literature, detailed specifications, performance data, instructions, and recommendations for products specified and proposed to be used on this project.

ii. Manufacturers' Catalog Sheets/Product Data:

o Submit catalog cuts, illustrations, schedules, diagrams, performance charts, instructions and brochures illustrating size, physical appearance and other characteristics of materials, systems or equipment.

o Submit only pertinent pages; mark each copy of standard printed data to identify specific products proposed for use.

iii. Approved Equals: For each item proposed as an "approved equal," submit supporting data, including drawings and samples as appropriate, comparison of the characteristics of the proposed item with that specified, and changes required in other elements of the work because of the substitution.

e. Schedule of Values: Provide breakdown of each lump-sum item into component work activities used in the schedule, for which progress payments may be requested. The total costs for the component work activities shall equal the contract price for that lump-sum item. Include mobilization, general condition costs, overhead and profit in the total dollar value for each lump-sum item. The

Schedule of Values will form the basis for progress payments.

f. Project Schedule - Construction Baseline Schedule: Contractor to prepare a graphically illustrated Construction Baseline Schedule including Notice to

Proceed, project milestones, formal inspections, Substantial Completion, and

Final Inspection. The construction schedule update will be used to evaluate the

Contractor's monthly applications for payment.

i. Recovery Schedule: When periodic schedule update indicates the Work is

13 or more days behind the current accepted schedule, a separate recovery schedule indicating means by which Contractor intends to regain compliance with the schedule must also be submitted. Indicate changes to working hours, working days, crew sizes, and equipment required to achieve compliance, and date by which recovery will be accomplished.

ii. Required Revisions: If, as a result of the monthly schedule update, it appears the currently accepted Construction Schedule no longer represents the actual prosecution and progress of the work, the Contracting Officer will request, and the Contractor shall submit, a revision to the

Construction Schedule. The Contractor may also request reasonable revisions to the currently accepted Construction Schedule in the event the

Contractor’s planning for the work is revised. If the Contractor desires to make changes, the Contractor shall notify the Contracting Officer in writing, stating the reason for the proposed revision. Accepted revisions will be incorporated into the currently accepted Construction Schedule for the next monthly schedule update.

o Procedure: If revision to the currently accepted Construction Schedule is contemplated, the Contractor or Contracting Officer shall so advise the other in writing at least seven calendar days prior to the next monthly schedule update meeting, describing the revision and reasons for the revision. Government-requested revisions will be presented in writing to the Contractor, who shall respond in writing within seven calendar days

g. Quality Control Plan Contractor shall prepare and submit a Quality Control Plan, which shall include:

i. A copy of a letter of direction to the Contractor's Quality Control (CQC)

Supervisor outlining assigned duties.

ii. The name, qualifications (in resume format), duties, responsibilities, and authorities of each person assigned in CQC function, including alternate to serve in the assigned CQC Supervisor’s absence.

iii. Methods of performing, documenting, and enforcing quality control of all work.

iv. Methods of monitoring and controlling environmental pollution and contamination as required by regulations and laws.

v. Procedures for scheduling, reviewing, certifying, and managing submittals, including those of subcontractor, offsite fabricators, suppliers, and purchasing agents.

vi. Reporting procedures, including proposed reporting formats.

h. Waste Management Plan: Submit a plan of the work procedures to be used in handling and disposal of stabilization debris. The plan shall comply with applicable requirements of Federal, State and Local waste regulations.

i. Qualification Data:

i. The Contractor shall submit qualifications of individuals who will be working on the project with evidence of their experience to perform the specified stabilization work.

ii. OSHA: The Site Safety Health Officer is required to have completed

OSHA 510 training, and each employee on site is required to have completed OSHA 10 Hour training.

C. MODIFICATIONS, CHANGES, DELAYS, & CONTRACTOR REQUESTS:

1) Requirements: When contract modifications or changes are initiated, delays are experienced, or the Contractor desires to revise the currently accepted Construction

Schedule, the Contractor shall submit to the Contracting Officer a written time impact analysis illustrating the influence of each modification, change, delay, or Contractor request on the contract time.

2) Time Extensions: Activity delays, which result in projecting a late completion date, shall not automatically mean that an extension of the contract time is warranted or due the Contractor.

Time extensions will be granted in accordance with the terms of the contract.

3) Extension of the contract time will be granted only to the extent the equitable time adjustments to the activity or activities affected by the modification, change, or delay exceeds the total (positive or zero) float available on a particular activity.

4) Procedure: Each analysis shall be submitted within the time period stated…