ATCH 1 STATEMENT OF WORK - Repair Brick Fireplace and Plaster.pdf

Cane River Creole National Historical Park

STATEMENT OF WORK:

Repair Oakland Main House and Overseer’s Fireplace and

Plaster

PMIS# 252823 & 252831

DATED:

December 2020

NATIONAL PARK SERVICE

SOUTHEAST REGION

Oakland Main House and Overseer’s Fireplace and Plaster SOW CARI

INTRODUCTION:

Cane River Creole National Historical Park (CARI) is comprised of two Creole plantations. The Oakland and Magnolia plantations are sites managed under one administration and located just outside the Natchitoches, Louisiana area.

Oakland Plantation, located at 4386 Highway 494 Bermuda, LA 71456, was founded by Jean Pierre Emanuel Prud’homme, who began farming the area in 1785 and received a Spanish land grant in 1789.

Eight generations of his French Creole family lived and worked on this land, managing to keep the physical complex intact for two centuries.

Magnolia Plantation, located at 5549 Highway 119 Derry, LA 71416, was established by Ambrose LeComte II and his wife Julia Buard LeComte in 1835. However, Magnolia’s early history is rooted in mid- 1700s colonial Louisiana. In 1753, Jean Baptiste LeComte I received a land grant on both sides of the Cane River laying the foundation for a cotton plantation unrivaled in the Cane River region.

Because of the integrity of the resources at Oakland and Magnolia, both plantations have been designated as National Historic Landmarks.

OBJECTIVE:

This contract shall address failing mortar joints on the Main House and Overseer’s House fireplace, plaster, and foundation located at the Oakland Plantation of Cane River Creole National Historical Park.

Contractor shall repoint all masonry surfaces where mortar is cracked, deteriorated, missing, or no longer present. The Main House shall require plaster repair and paint to interior walls adjacent to fireplace. Contractor shall rake out failing mortar joints and repoint with natural hydrated lime mortar.

All finished repointing work shall match existing/adjacent historic joint work in color and finish texture.

Contractor shall provide interior assessment of both structures throat, smoke chamber, flue, crown, flashing, cap, and smoke shelf for structural stability. All work shall comply with the Secretary of

Interior’s Standards for Historic Preservation available online at The Secretary of the Interior’s

Standards—Technical Preservation Services, National Park Service (nps.gov).

Oakland P. Overseer’s House:

Contractor shall provide all labor, equipment, supervision, and materials to repoint deteriorated mortar joints of the Overseer’s House Fireplace and Foundation.

• Contractor shall test and identify joints to be repaired of approximately 200 square feet of brick foundation. (Oakland Overseer’s House: Under Room 101 and Room 104)

• Sections of Portland cement mortar joints to be removed shall be approved by Park Contracting

Officer Representative (COR). Only loose sections of Portland cement parging shall be removed;

solid sections of parging shall be left in place.

https://www.nps.gov/tps/standards.htm https://www.nps.gov/tps/standards.htm

• Once identified and confirmed with Park COR, contractor shall rake joints and dispose of material removed.

• Contractor shall repoint mortar joints with hydrated lime (see specific requirements).

• Interior structural assessment via remote or tethered camera for both locations and recommendations for treatment.

Oakland P. Main House:

Contractor shall provide all labor, equipment, supervision, and materials to repoint deteriorated mortar joints of the Main House Fireplace and Foundation.

• Contractor shall test and identify joints to be repaired of approximately 200 square feet of brick fireplace. (Oakland Main House: Room 202 and Room 210)

• Contractor shall repair 30 square feet of failing plaster on adjacent interior wall and prime and paint. (Oakland Main House: Room 210)

• Sections of Portland cement mortar joints to be removed shall be approved by Park Contracting

Officer Representative (COR). Only loose sections of Portland cement parging shall be removed;

solid sections of parging shall be left in place.

• Once identified and confirmed with Park COR, contractor shall rake joints and dispose of material removed.

• Contractor shall repoint mortar joints with hydrated lime (see specific requirements).

• Interior structural assessment via remote or tethered camera for both locations and recommendations for treatment.

SCOPE:

1. Contractor shall provide all material, equipment, parts and labor required to perform all the work of this contract.

2. No ground disturbance is authorized other than removing loose dirt and other debris that has been wind-blown in over time.

3. Fireplaces shall remain structurally stable during repairs.

4. No damage to historic bricks shall occur while removing mortar. Power tools, such as grinders, shall

NOT be used. Contractor shall be responsible for any damage to historic bricks.

5. Only low-pressure water spray shall be used on masonry as high pressure may damage both mortar and masonry.

6. Contractor shall use Park furnished replacement bricks to fill voids or replace brick damaged during raking. Brick shall be cut to surrounding brick dimensions to keep wall surface flush. Brick was produced for the Park, based on analysis of historic materials.

7. All equipment, material and waste removed or generated by work of this contract shall be properly disposed of offsite by the contractor within state and federal regulation.

8. Contractor shall verify all quantities and dimensions of SOW.

9. Contractor shall provide a work site and environment that is safe for employees, for visitors to the

Park, and NPS staff. The work area will be cordoned off (if necessary) and secure.

10. Contractor shall leave the worksite clean and free of construction debris daily.

11. All equipment shall be stored or removed from area daily.

12. Contractor shall provide safe passage into the building for the duration of the contract.

13. Upon completion of a site, ground shall be raked smooth around foundations and all excess material (existing and work associated) and tools shall be removed.

14. All work shall be performed Monday through Friday from 6:00 am until 4:00 pm. No work shall be performed on weekends or federal holidays without prior approval.

15. The Park shall designate contractor, employee parking, equipment storage areas, and access points. No company signs shall be installed on government property. Smoking and eating shall be performed in areas designated by the Park. Employees shall always wear appropriate clothing.

SPECIFIC REQUIREMENTS:

A. Testing and identifying joints methods:

1. Cracks that can be penetrated 1/4 inch (6 mm) or more by a knife blade 0.027 inch (0.7

mm) thick.

2. Cracks 1/16 inch (1.6 mm) or more in width and of any depth.

3. Hollow-sounding joints when tapped by metal object.

4. Eroded surfaces 1/4 inch (6 mm) or deeper.

5. Deterioration to point that mortar can be easily removed by hand, without tools.

6. Joints filled with substances other than lime mortar.

7. Identified areas shall be taped for approval by COR before raking begins.

B. Tools:

1. Remove mortar with hand tools (chisel and hammer). Use of power tools is not allowed.

2. Pans, shovels, wheelbarrows, hand carts, mud hoes, tuckpointers (1/8” thru ¾”), buckets are permitted. Motorized wheelbarrows and mixers are prohibited.

C. Mortar:

1. LimeWorks Ecologic Mortar (G) DGM 150 Coarse with Natural Hydraulic Lime (NHL).

2. Mixture ratio: 1 part NHL 3.5/2 parts sand

3. > 750 p.s.i.

4. Use mortar within one hour of final mixing; do not re-temper or use partially hardened material.

D. Paint:

1. Main House Dining Room (210): Sherwin Williams Super Paint Flat interior Latex color SW 8297 Tarn or approved equivalent.

2. Main House Bedroom (202): Sherwin Williams Super Paint Flat Interior Latex color Munsell Green SW 6436 or approved equivalent.

EXECUTION: This contract shall include, but is not limited to the following tasks:

A. Protection:

1. Carefully remove objects and associated displayed items adjacent to masonry and store during masonry repointing. Reinstall or when repointing is complete.

2. Items stored in nearby vicinity of work area shall be covered in plastic.

3. Provide temporary rain drainage during work to direct water away from building.

B. Raking:

1. Remove mortar from joints to depth of joint width plus 1/8 inch (3 mm) and not less than that required to expose sound, un-weathered mortar. Do not remove unsound mortar more than 2 inches (50 mm) deep; consult COR for direction.

2. Remove mortar from brick and other masonry surfaces within raked-out joints to provide reveals with square backs and to expose masonry for contact with pointing mortar. Brush, vacuum with filter, or flush joints with clean, low-pressure water spray (exterior only) to remove dirt and loose debris. Provide temporary rain drainage during work to direct water away from building. Plastic sheeting shall be used for interior purposes to collect debris or prevent dust on nearby items.

3. Notify COR of unforeseen detrimental conditions including voids in mortar joints, cracks, loose masonry units, rotted wood, rusted metal, and other deteriorated items.

C. Pointing with Mortar:

1. Rinse joint surfaces with water to remove dust and mortar particles. Time rinsing application so, at time of pointing, joint surfaces are damp but free of standing water. If rinse water dries, dampen joint surfaces before pointing.

2. Apply pointing mortar first to areas where existing mortar was removed to depths greater than surrounding areas. Apply in layers not greater than 3/8 inch (9 mm) until a uniform depth is formed. Fully compact each layer and allow it to become thumbprint hard before applying next layer.

3. After deep areas have been filled to same depth as remaining joints, point joints by placing mortar in layers not greater than 3/8 inch (9 mm). Fully compact each layer and allow to become thumbprint hard before applying next layer. Where existing masonry units have worn or rounded edges, slightly recess finished mortar surface below face of edges onto exposed masonry surfaces or to featheredge the mortar.

4. When mortar is thumbprint hard, tool joints to match original appearance of joints as demonstrated in approved mockup. Remove excess mortar from edge of joint by brushing.

5. Cure mortar by maintaining in thoroughly damp condition for at least 72 consecutive hours. Coordinate mortar curing accordingly to avoid weekend and holiday work, unless approved by COR.

6. Hairline cracking within mortar or mortar separation at edge of a joint is unacceptable.

Completely remove such mortar and repoint.

D. Final cleaning of repointed Masonry:

1. If repointing work is carefully executed, there will be little need for cleaning other than to remove the small amount of mortar from the edge of the joint following tooling.

2. Remove excess repointing mortar from joint edge with a stiff natural bristle or nylon brush after the mortar has dried, but before it is initially set. Do not employ aggressive cleaning methods that could damage masonry surfaces or the mortar.

E. Structural assessment and recommendations for treatment:

1. Contractor shall provide structural assessment and inspection of each fireplace.

2. Inspection shall include interior and exterior inspection

3. Upon completion of inspection, contractor shall provide treatment recommendations for any concerns found.

SUBMITTALS:

Contractor shall submit cut sheets to the COR for material approval prior to use for the following items:

Product Submittals (Cut Sheets):

1. Lime mortar (manufacturer, SDS sheets)

2. Plaster and paint(manufacturer, SDS,

3. Workplan and schedule

4. Equipment

Government-Furnished Property, Material, Equipment, or Information (GFP, GFM, GFE, or GFI):

• Brick for fill or replacement:

1. 8 ½” x 4” x 2 ½”

2. 7 ¾” x 4” x 2 ½”

Period of Performance:

January 2022 to June 2022.

SAFETY:

All work performed on government property shall be accomplished in accordance with OSHA, EPA, Federal, State and local regulations and requirements. Prior to starting work on government property, the contractor shall submit to Cane River Creole National Historical Park (CARI) for approval a copy of their company safety plan pertaining to this particular contract. Although not all inclusive, the safety plan must address at a minimum the following areas:

1) Confined space operations (if required)

2) Heavy equipment operations (if required)

3) Public/visitor safety (barriers/signage, etc…)

4) Traffic safety plan (if required)

5) Trenching/sloping of soil

6) Personal protective equipment to be used

7) Hazardous materials (HAZMAT) to be used

a. Copies of Safety Data Sheets must be provided to CARI

b. Storage of HAZMAT

8) Emergency response protocols

9) Personnel training requirements

10) OSHA DART rate

a. OSHA 300A Summary for last three years

Contractor shall use “green” products whenever possible and all HAZMAT must be pre-approved for use by the CARI Collateral Duty Safety Coordinator. The contractor shall be responsible for the safety and security of the site to ensure unauthorized personnel (park visitors & employees) do not enter the construction area.

SECURITY & WORK HOURS:

Contractor shall only perform this work during normal operating hours (6:00am – 4:00pm) from Monday to Friday, unless Park gives approval.

AREA OF POTENTIAL EFFECT

Oakland Plantation Main House

Oakland Plantation Overseer’s House

Map indicating location of structures within Oakland Plantation

Main House Room 210

Image depicts damage to plaster on west side of fireplace

Main Hose Room 210

Image depicts deterioration of brick and masonry features of hearth

Main House Room 210

Image depicts exfoliation of brick, masonry, and plaster on east (left) side of chimney

Main House Room 202

Image depicts deterioration of masonry, plaster, and finishes

Main House Room 202

Image depicts deterioration of masonry, plaster, and finishes on west (left) side of chimney

Overseer’s House Room 101

Image depicts overall deterioration of masonry, plaster, and finishes of chimney

Overseer’s House Room 101

Image depicts deterioration of masonry, plaster, and finishes on east (left) side of chimney

Overseer’s House Room 104

Image depicts deterioration of brick and masonry features on east (left) side of chimney

Overseer’s House Room 104

Image depicts deterioration of brick and masonry features on west (left) side of fireplace

Overseer’s House Foundation