A04_SOW.pdf

George Washington Birthplace National Monument Visitor Center Windows

National Park Service

U.S. Department of the Interior heast Region

Rehabilitate Chimneys and Brick

Steps at Quarters 1 and Quarters 2

PMIS NO.: 320885

PROJECT MANUAL

GEORGE WASHINGTON

BIRTHPLACE NATIONAL

MONUMENT

1732 Popes Creek Road

Colonial Beach, VA 22443

FRONT COVER:

Quarters 1

Mailing Address:

George Washington Birthplace NM 1732 Popes Creek Road, Colonial

Beach, VA 22443

To review general information about George

Washington Birthplace please visit:

www.NPS.gov/GEWA http://www.nps.gov/GEWA

Rehabilitate Chimneys and Brick Steps at

Quarters 1 and Quarters 2

TABLE OF CONTENTS

The complete Project Manual for this Project consists of this entire bound volume which is not to be separated for any reason. The Contracting Officer is not responsible for any assumptions made by a Contractor (or Subcontractor) who does not receive a complete bound Project

Manual containing all sections and documents listed in the Table of Contents, below.

SECTION 1 SUMMARY OF WORK

SECTION 2 ADMINISTRATIVE REQUIREMENTS

SECTION 3 FORMS

SECTION 4 ARCHEOLOGICAL PROTECTION

SECTION 5 HISTORIC REMOVAL AND DISMANTLING

SECTION 6 REHABILITATION OF BRICK MASONRY

SECTION 7 UNIT MASONRY

SECTION 1

SUMMARY OF WORK

PART 1 GENERAL

1 .1

A. DESCRIPTION

The Work of this Contract consists of the removal of grinding out failed and deteriorated mortar joints and repointing brickwork to match existing; removing spalled and damaged bricks salvaging as many bricks as possible; and replacing with replacement brick to match existing, for two chimneys and for two porches on two circa 1932 houses.

Contractor shall provide all labor, equipment, materials and services as necessary to complete the work and restore to fully and correctly functioning system. The contractor is required to meet the requirements herein, as recommended by the manufacturer and as required to meet applicable local and national building codes and standards and address existing conditions at the job site.

These buildings serve as private residences and are not open to the public.

B. SCOPE

1. Contractor shall obtain an unweathered sample of existing mortar and have a mortar analysis performed by a qualified laboratory. The analysis shall determine mortar type, composition, color, texture, and any other pertinent information needed to make a match to the existing mortar. A custom blend of lime-based mortar will be used. The Contractor shall provide a mockup of the proposed mortar sample and obtain approval from the COR, prior to the start of work.

2. Contractor shall prepare surfaces.

3. Contractor shall replace missing or spalled bricks with new bricks and mortar. A mockup of the proposed brick must be provided to the COR and approval obtained, prior to the start of work.

4. Contractor shall rake out and repoint two (2) chimneys, each measuring approximately 6’Width, 3’

Depth, and 29’ Height.

5. Contractor shall rake out and repoint two (2) sets of steps, each measuring approximately 7’Width and

42” Depth.

a. The new mortar must match the historic mortar in color, texture, and tooling.

b. The sand must match the sand in the historic mortar.

c. The new mortar must have greater permeability and be softer than the masonry units.

6. It is incumbent upon the Contractor to furnish personnel who can and will execute first-class workmanship in the materials and methods specified, who are trained in the methods of historic masonry, and who will take the necessary precautions to protect the elements of the structures scheduled to receive Work under this Contract. The Contractor shall take precautions to ensure that existing structures are not damaged or destroyed during the Work.

7. Contractor shall remove any biological growth on existing brick.

8. Chimneys and steps shall be restored and demonstrate to be a fully functioning system free of leaks, foreign matter due to the Work, and proper function to the COR before final acceptance.

C. PRE-BID SITE EXAMINATION AND FIELD VERIFIVCATION

1. All prospective Bidders, and their Subs, as appropriate are strongly encouraged to visit and examine the existing conditions of the Project prior to submission of Bid in order to better understand the Work, and aid in forming any questions prior to the submission of Bid.

All dimensions provided by the Government should be considered approximate. Contractor and all Subcontractors shall verify all new and existing dimensions prior to the commencement of Work and/or ordering of products and materials that may affect the Work of this Contract. Any and all discrepancies shall be forwarded to the Contracting Officer in writing for clarification prior to the commencement of Work. Any Work performed prior to said clarification, particularly and including that which may require correction shall be corrected by the Contractor with no additional costs to the Contract and Government and no time extension shall be made to the Contract Schedule.

1. Lack of knowledge of the existing conditions will not be allowed as a basis for extra compensation.

2. Site visits shall be scheduled with the Park Facility Manager, Beverly Bruce, at (540) 654-

6060, between the hours of 7:30 a.m. and 3:30 p.m., Monday through Friday.

D. QUALIFICATIONS

3. Prospective Bidders must show past evidence of historic preservation specific and specific to historic masonry techniques. The Contractor and Sub-Contractors shall adhere to all applicable Federal, State, local, regulations and is responsible for obtaining all permitting necessary to perform the Work.

1.2 DEMOLITION

A. Before beginning any demolition or deconstruction Work, survey and examine the Site to determine the extent of the Work. Take necessary precautions to avoid damage to existing items to remain in place, to be reused, or to remain property of Government.

B. Disposal of removed equipment and materials shall be the Contractor's responsibility.

C. Abandonment in place is not permitted. Where removals leave holes and damaged surfaces exposed in the finished Work, patch and repair holes and damaged surfaces to match adjacent finished surfaces, using on-site materials when available. Where new Work is to be applied to existing surfaces, perform removals and patching in a manner to produce surfaces suitable for receiving new Work. Finished surfaces of patched area shall be flush with the adjacent existing surface and shall match the existing adjacent surface as closely as possible as to texture and finish.

1.3 ACCIDENT PREVENTION

A. All Work on the Site shall be in compliance with the applicable Occupational Safety and Health

Administration (OSHA) 29CFRConstructionIndustryRegulationsandStandards.

B. Personal protection equipment (PPE). All workers will adhere to the OSHA regulations for the use of PPE.

1. Safety glasses.

2. Safety toe shoes/boots.

3. Hearing protection.

4. Tools and equipment will meet OSHA regulations for safe operations.

C. Submit site safety plan attain the approval from the COR before a Notice to Proceed at is issued.

A format for a Safety Plan is available upon request.

D. Establish and maintain an Accident Prevention Program.

1. Ensure that employees are physically qualified to perform their assigned duties in a safe manner.

2. Do not allow employees or volunteers to work whose ability or alertness is impaired due to conditions that may expose them or others to injury.

3. The Program shall include:

a. Name of person in charge of the program

b. Weekly safety meetings while on site

c. First aid procedures

d. Outline hazards associated with Work

e. Planning for possible emergency situations: slides, cave-ins, windstorms, etc.

f. Housekeeping and clean-up

E. Training initial and continuing. Accident Reporting

1. Reportable Accidents is defined as death, occupational disease, traumatic injury to employees or public, property damage by accident in excess of $100, and wild land fires.

2. For Reportable Accidents, call 911 and then immediately notify Contracting Officer, and

COR.

3. All other Accidents Contractor shall notify Contracting Officer and COR as soon as possible.

4. Assist Contracting Officer and other officials as required in the investigation of accidents.

1.4 WORK COMPLETION

A. Complete all Work within 90 calendar business days after receipt of Notice to Proceed. The time stated for completion shall include final clean-up of the premises.

1.5 LOCATION

A. George Washington Birthplace National Monument, 1732 Popes Creek Road, Colonial Beach

22443.

1.6 CONTRACTOR'S USE OF PREMISES

A. Coordinate construction efforts with the Contracting Officer such that there is minimal impact to the work of the National Park Service personnel and the visiting public. Ensure the building remains secured during the duration of the contract.

B. Take all necessary measures to protect public and employees from hazards associated with the work of this contract.

C. At all times conduct operations to ensure the least inconvenience to the public. Fence, barricade, or otherwise block off the immediate work area to prevent unauthorized entry. Erect and maintain fencing, barricades, lights, signals, and warning signs in accordance with latest

Manual on Uniform Traffic Devices (MUTCD).

D. Construction Camp: The scope and size of the construction camp will be assigned to the

Contractor by the park Contracting Officer’s Representative (COR).

E. Storage of materials: Confine storage of materials to an area as defined by the COR. The

NPS shall bear no responsibility for the stored materials.

F. Preservation of Natural Features: Confine all operations to work limits of the Project. Prevent damage to natural surroundings. Restore damaged areas, repairing or replacing damaged trees and plants, at no additional expense to Government.

1. Provide temporary barriers to protect existing trees and plants and root zones.

2. Do not remove, injure, or destroy trees or other plants without prior approval. Consult with Contracting Officer and remove agreed-on roots and branches that interfere with construction.

3. Do not fasten ropes, cables, or guys to existing trees.

4. Existing Utilities: Contractor shall be responsible for locating and preventing damage to known utilities. If damage occurs, repair utility at no additional expense to the

Government.

G. Hauling Restrictions: Comply with all legal load restrictions in the hauling of materials. Load restrictions on park roads are identical to the state load restrictions with such additional regulations as may be imposed by the Park Superintendent. Information regarding rules and regulations for vehicular traffic on park roads may be obtained from the Office of the Park Superintendent. A special permit will not relieve Contractor of liability for damage, which may result from moving of equipment.

H. Hours of Operation:

1. Contractor's hours of operation at the site shall be normal working hours of the park staff from 7:00 AM to 3 PM, Monday thru Friday, unless otherwise allowed by Contracting

Officer or COR.

2. All work outside the above time period shall only occur with the written approval of

Contracting Officer. No Work will occur at the site on days of the week that coincide with

National Holidays or when the park is closed to the public due to weather emergencies.

3. Any weekend Work or overtime Work shall be verified in writing 48 (forty-eight) hours in advance of that work being performed.

I. CONSTRUCTION MATERIALS

1. All materials, including borrow and aggregates, shall be Contractor-furnished from outside the Park.

2. Before beginning on-site Work, submit a list of materials that might be recycled during the course of the Contract. This list should name the material, recycling methods, and/or proposed disposal location. This list is for information only. Recycling is voluntary, but highly encouraged.

3. New Construction Materials: Contractor is encouraged to submit for approval products made from recycled or environmentally responsible material. Every effort will be made by the NPS to approve these materials.

J. HAZARDOUS MATERIALS

1. All hazardous material will be the contractor’s responsibility to properly dispose of. Proper disposal will meet both Virginia and federal regulations.

2. Landfill Receipts: Submit copy of receipts issued by a landfill facility, licensed to accept hazardous materials, for hazardous waste disposal, if applicable.

K. TEMPORARY FACILITIES

1. Sanitary Facilities/Toilets: Use of existing toilet facilities is not permitted. The Contractor will provide portable toilet(s) and will be located as directed by the Government. Portable toilet(s) shall be emptied and cleaned weekly at a minimum and more often if necessary.

2. Portable Toilet: Sufficiently lighted and ventilated toilet facilities in weatherproof, sight proof, sturdy enclosures with privacy locks. COR will designate the location for the portable toilet.

L. QUALITY ASSURANCE

1. All materials shall be contractor furnished from outside the park. Primer and paint will be exact match to current exterior paint color on base bid and will be primed and painted to match existing sheen and color.

1.7 EXECUTION

A. CUTTING AND REPAIRING

1. The Contractor shall do all necessary cutting and patching for the installation of his work.

The patching shall be completed to the satisfaction of the COR. All disturbed surfaces shall be repaired with materials to match adjacent surfaces exactly and made water-tight. Prior to cutting or drilling the Contractor shall obtain approval of his layout with the COR.

B. ELECTRICAL

1. Contractor shall verify exact electrical requirements of all equipment, motors and control devices and provide electrical power as required but, in no case, less than shown in the specification. Contractor shall provide branch circuit short circuit and ground fault protection required by NEC.

END OF SECTION

SECTION 2

ADMINISTRATIVE REQUIREMENTS

PART 1 GENERAL

2.1 DESCRIPTION

A. This Section includes administrative and procedural requirements for submitting Shop Drawings, Product Data, Samples, and other submittals.

2.2 SUBMITTAL AND APPROVAL PROCEDURES

1. Manufacturers' Catalog Sheets: Submit only pertinent pages; mark each copy of standard printed data to identify specific products proposed for use.

2. Manufacturer's Installation Instructions: When contract documents require compliance with manufacturer's printed instructions, provide one complete set of instructions for

Contracting Officer and keep another complete set of instructions at the project site until substantial completion.

B. Contracting Officer reserves the right to require submittals in addition to those called for in individual sections.

C. Coordinate all submittals and review them for legibility, accuracy, completeness, and compliance with contract requirements. Forward submittals that are related to or affect one another as a package to facilitate coordinated review. Each transmittal shall contain only data specific to that individual submittal.

D. Submittal Identification:

1. Identification shall include the park name-package number, project title, contract number, and transmittal number.

2. Transmittal: Package each submittal individually and appropriately for transmittal and handling transmit each submittal using a transmittal form. Contracting Officer will return submittals without review, received from sources other than the contractor.

a. CM-16 Transmittal Form: All material submittals shall be transmitted using

National Park Service form CM-16. (This form can be downloaded from the

Workflows website at http://www.nps.gov/dscw/con_subreview21.htm. No action will be taken on material submittal item unless accompanied by the transmittal form.

3. All manufacturer's catalog sheets, samples, and other documents submitted to the Contracting

Officer and COR must have the identification information shown on the submittal.

http://www.nps.gov/dscw/con_subreview21.htm

4. Identification information shall be applied to the bottom right margin on each page.

Identification information on samples shall be applied to the most readily visible area on the sample or on tags attached to sample.

E. Submittal Numbering:

1. Number each submittal consecutively.

2. For re-submittals use the original submittal number, plus a letter suffix beginning with A.

3. Additional re-submittals of the same item shall contain the original number with the next consecutive letter.

F. Contracting Officer's Review:

1. Submittals will be returned disapproved without technical review if identification information is missing, not filled in, or if placed on the back of the submittal; an incorrect number or format of submittals is provided; the transmittal form is incorrectly filled out;

submittals are not coordinated; or submittals do not show evidence of Contractor's approval.

2. Any Work done or orders for materials or services placed before approval shall be at the

Contractor's own risk and cost.

3. After reviewing submittals, the Contracting Officer will return a copy of applicable

(marked up) submittal sheets to the Contractor. Shop drawing review notations will be returned on the reproducible original shop drawing. All other submitted items will be retained. The Contractor is responsible for producing additional copies for his/her own use.

4. The returned submittal will be marked in one of three ways as defined below:

a. APPROVED: Acceptable with no corrections.

b. APPROVED WITH NOTATIONS: Minor corrections or clarifications required.

All comments are clear and no further review is required. The Contractor shall address all review comments when proceeding with the work.

c. DISAPPROVED - RESUBMIT: Rejected as not in accordance with the contract or as requiring major corrections or clarifications. The Contracting Officer will identify the reasons for disapproval. The Contractor shall revise and resubmit with changes clearly identified.

G. Project Meetings:

1. Preconstruction Conference Following the Award of Contract and before the

Notice to Proceed is issued, the first Preconstruction Conference will be held to review all contractual requirements.

2. Attendees: Government Representatives, the Contractor and appropriate

Subcontractors as determined by the Contractor shall be represented at this meeting. Other Government personnel and interested parties may attend. All participants at the meeting shall be familiar with the Project and authorized to conclude matters relating to the Work.

3. The meeting agenda will include the following as a minimum:

a. Roles & Responsibilities / Lines of Authority and Communication;

b. Park rules and regulations;

c. Jobsite Safety;

d. Labor Law application;

e. Modifications;

f. Payments to Contractor;

g. Payroll reports;

h. Contract time;

i. Liquidated Damages (if applicable);

j. Contractor Performance Evaluation;

k. Display of Hotline posters;

l. Notice to Proceed;

m. Permit Requirements;

n. Correspondence Procedures;

o. Acceptance/Rejection of Work;

p. Progress Meetings;

q. Submittal Procedures;

r. NPS Final Accessibility Inspection (if applicable);

s. Environmental Requirements;

t. Record Drawings/Operation and Maintenance (O&M) manuals;

u. Saturday, Sunday, Holiday and Night Work;

v. Reference Materials;

w. Value Engineering (if applicable).

4. The Government will prepare and distribute minutes for the Preconstruction

Conference.

5. Following the Preconstruction Conference and submittal of all required documents the Government will issue the Notice to Proceed with the Work.

H. Product Data: For each type of product.

I. WARRANTY

a. The successful bidder on the contract will be required to submit in writing a 1 year guarantee on workmanship to cover any resulting paint flaking or corrosion surfacing.

The manufactures warranty must be submitted for the primer and the paint and must be provided to the COR Warranty Period:

For Parts: One year from date of Substantial Completion.

For Labor: One year from date of Substantial Completion.

J. Project Closeout

The Contractor shall request in writing a final inspection. The COR will make an inspection within 10 days of receipt of request. Before requesting the final inspection, the Contractor shall remove all tools, equipment, surplus materials, and rubbish, and restore to original condition surfaces or structures that are damaged due to work of this contract. At the time of final inspection, the project shall be complete.

When work is determined to be substantially complete, the COR will prepare a list of deficiencies to be corrected before final acceptance and issue a Letter of Substantial Completion. Contractor shall complete the work described on the list of deficiencies within 90 calendar days, weather permitting.

If the Contractor fails to complete the work within this time frame, the Contracting Officer may replace, repair, or remedy the work with an appropriate reduction in the contract price.

If work is not determined to be substantially complete, Contracting Officer will notify Contractor in writing. After completing work, Contractor shall resubmit certification and request a new final inspection.

After all deficiencies have been corrected, a Letter of Acceptance will be issued.

Remove all tools, equipment, surplus materials, and rubbish. Restore or refinish surfaces of existing facilities that are marred, scratched, or damaged due to the work of this contract to match the existing/previous finishes.

SECTION 3

FORMS

PROJECT:

SOLICITATION NUMBER: Date:

TO:

FROM: (name of person) COMPANY:

SUBJECT:

SPECIFICATION SECTION OR DRAWING #:

PLEASE PROVIDE THE FOLLOWING INFORMATION OR CLARIFICATION:

Response required by (date):

RESPONSE

DATE:

TO:

COMPANY:

FROM:

SUBJECT: Response to RFI No

REQUEST FOR INFORMATION #

CM-16 TRANSMITTAL FORM -

NATIONAL PARK SERVICE

Park: PMIS No.: Project: Contract No.: Date: Transmittal No.:

Sheet: 1 of:

Contractor: Subcontractor / Supplier: NPS ACTION Action Submit tal

Information al

Submittal

A c ti o n S u b m itt a l

In fo rm a ti o n a l S u b m it ta l

It e m

N o

Specificati on Section

No.

P a ra g ra p h N o

Description of Item

(Size, Type, Name, Manufactur er, Use, Etc.) N o . o f C o p ie s S u b m it te d

C o n tr ib u te s t o m e e ti n g L

E E

D

M e e ts

B u y A m e ri c a n

A c t R e q

A lte rn a te

M a te ri a ls

P ro p o s

N

. o f C o p ie s R e tu rn

A p p ro v p ro v e d w ith N o ta ti o n s is a p p ro v e d

R e s u b m it c c e p t

R e je c t

Contractor's Signature: Recommended by:

Title: Date: I hereby certify that this submittal has been reviewed for accuracy, completeness, and compliance with contract requirements

(FAR 52.236-21)

Title: Date:

Review Comments: Action by:

Title: Date:

Approval of this submittal is subject to the provisions of the contract drawings and

Specifications. This action is for general concurrence only and the government is not responsible for errors or omissions

Date Received: Distribution: 1 copy each: CMR Interim, A/E, DSC, Contr.

Date To Contractor: r03/10

CM-16 TRANSMITTAL FORM CONTINUATION -

NATIONAL PARK SERVICE

Park: PMIS No.: Project: Contract No.: Date: Transmittal

No.: Sheet:

of:

Contractor: Subcontractor / Supplier: NPS ACTION

Action Subm ittal

Informatio nal

Submittal

A c ti o n S u b m itt a l

In fo rm a ti o n a l S u b m it ta l

It e m

N o

Specificati on

Section

No.

P a ra g ra p h N o

Description of Item (Size, Type, Name, Manufactur er, Use, Etc.) N o . o f C o p ie s S u b m it te

C n tr ib u te s t o m e e ti n g L

E E

M e ts

B u y A m e ri c a n A c t R e q

A lte rn a te

M a te ri a ls

P ro p o s

N

. o f C o p ie s R e tu rn p ro v p ro v e d w ith N o ta ti o n s is a p p ro v e d

R e s u b m it c c e p t

R e je c t

Review Comments r03/10

SAMPLE CONTRACTOR'S QUALITY CONTROL DAILY REPORT

REPORT NO. · SHEET 1 OF

PROJECT CONTRACT NO. DATE

PARK CONTRACTOR'S REPRESENTATIVE ON THE JOB

WEATHER (Rain, Snow, Cloudy, Windy, etc.) RAINFALL

(Inches)

TEMPERATURE GROUND CONDITIONS (Dry, Damp, Wet, Frozen, etc.) MAX. Min.

1. PRIME CONTRACTOR

NO. EMPLOYEES BY JOB CATEGORIES Hours HEAVY EQUIPMENT ON

JOB

NO.

UNITS

HOURS

WORKING

YES NO Comments

WORK PERFORMED BY PRIME CONTRACTOR:

MATERIALS DELIVERED OFFICIAL VISITORS TO SITE

2A. SUBCONTRACTOR, (If more than one subcontractor use copies of following page.)

NO. EMPLOYEES BY JOB CATEGORIES Hours HEAVY EQUIPMENT ON J NO. UNITS HOURS WORKING

YES NO Comments

WORK PERFORMED BY SUBCONTRACTOR:

3. SPECIFIC INSPECTIONS: Inspections performed, results and corrective actions)

4. TESTING: Check box if any testing was performed today. (Complete and attach Test Report Information Sheets.)

Type and Location of Testing:

5. VERBAL INSTRUCTIONS RECEIVED FROM THE GOVERNMENT ON CONSTRUCTION DEFICIENCIES AND/OR RETESTING

REQUIRED:

6. REMARKS:

7. CERTIFICATION:

I certify that the above report is complete and correct and that I, or my authorized representative, have inspected all work performed this day by the prime contractor and each subcontractor and determined that all materials, equipment, and workmanship are in strict compliance with the Contract Documents except as may be noted above.

Contractor's Quality Control Representative

013513.22 ARCHEOLOGICAL PROTECTION - Page 1 of 4

SECTION 01 35 13.22

ARCHEOLOGICAL PROTECTION

PART 1 - GENERAL

1.1 SUMMARY

A. Section consists of protecting archeological resources contained in soil deposits in and adjacent to, specifically, the area along Sunken Road comprising both sides of the existing brick masonry retaining wall panels 138-145, inclusive.

1.2 DEFINITIONS

A. Archeological Resources: Archeological resources are physical evidences of past human activity, including evidences of effects of that activity on the environment.

Archeological resources represent both prehistoric and historic time periods, found above and below ground and under water.

B. Archeologically Sensitive Areas: Areas having potential to contain significant (National Register eligible) archeological resources. If National Register eligible or listed archeological resources could not be avoided, an appropriate mitigation strategy would be developed in consultation with state historic preservation officer and, if necessary, associated American Indian tribes.

C. Archeological Monitor: Representative of Government designated to oversee construction activities that could disturb archeological resources.

D. Archeological Resources Protection Act (ARPA) of 1979 (Public Law (P.L.) 96-95; 93 United States Statues at Large (Stat.) 712): defines archeological resources as any material remains of past human life or activities that are of archeological interest and at least 100 years old; Section 4 of the statute describes the requirements that must be met before Federal authorities can issue a permit to excavate or remove any archeological resource on Federal or Indian lands; the curatorial requirements of artifacts, and other materials excavated or removed.

1.3 SUBMITTALS

A. Daily Work Schedule: Detail construction work in the archeologically sensitive area.

Submit to Contracting Officer (CO) at least 30 days before start of ground-disturbing site work.

1.4 QUALITY ASSURANCE

A. At least one week before onsite work begins, Contractor shall meet with Contracting Officer and Archeological Monitor to discuss Daily Work Schedule, equipment, and special methods used in the archeologically sensitive area. Contractor shall ensure approved Daily Work Schedule is followed throughout construction.

013513.22 ARCHEOLOGICAL PROTECTION - Page 2 of 4

PART 2 - PRODUCTS

2.1 DAILY WORK SCHEDULE

A. Daily Work Schedule is required for work occurring within the archeologically sensitive area. Include all work that is to occur within the area and key the schedule to the Contract Documents to include:

1. Starting and ending dates of ground-disturbing construction.

2. Locations of temporary facilities, such as barriers, field offices, staging areas, sanitary facilities, borrow pits, and haul and access roads.

3. Types of construction, such as clearing, topsoil stripping, structure or trench excavation, landscaping, and post construction clean-up.

4. Methods and equipment used for each type of construction.

5. Plan for relocating work in the event of temporary work stoppages at the archeologically sensitive area.

PART 3 - EXECUTION

3.1 BARRICADES

A. Provide temporary barriers to protect and exclude the public from archeologically sensitive areas during contract work and/or archeological monitoring operations.

Temporary barriers shall be configured to clearly prohibit unauthorized entry and to prevent people from easily entering the sensitive area(s).

B. Barricades shall be structurally adequate and shall contain warning signs in compliance with requirements of Manual on Uniform Traffic Control Devices (MUTCD), part IV, most-recent edition.

C. Materials

1. Temporary materials may be new or used, but must be adequate in capacity for the required usage, must not create unsafe conditions, and must not violate requirements of applicable codes and standards.

2. Portable Chain-Link Fencing: Minimum 2 inch, 9-gage, galvanized steel chain-link fabric fencing; minimum 6 feet high with galvanized steel pipe posts; minimum 2- 3/8 inch OD line posts and 2-7/8 inch OD corner and pull posts, with 1-5/8 inch OD top and bottom rails. Provide concrete or galvanized steel bases for supporting posts.

3. Safety Barrier Fence: Orange plastic fence, minimum height, 4 feet.

3.2 PERMITTING FOR ARCHEOLOGICAL INVESTIGATION

A. Permits are normally issued under the Archaeological Resources Protection Act of 1979 (ARPA). The NPS does not issue a permit for archeological investigations carried out by NPS archeologists, or to archeologists working on NPS archeological projects under a contract or cooperative agreement.

013513.22 ARCHEOLOGICAL PROTECTION - Page 3 of 4

3.3 OBSERVATION

A. Archeological Monitor will observe ground-disturbing site work, including construction of temporary facilities, at archeologically sensitive areas, from a safe location mutually agreed on by Contractor and Monitor. As new ground is broken, Monitor will examine excavated materials, using construction layout centerline and perimeter staking as a reference point to record locations of findings.

3.4 DISCOVERY OF RESOURCES

A. If Archeological Monitor discovers resources, immediate relocation of work to a non-sensitive area may be required for Monitor to identify and document resources and, if necessary, develop appropriate mitigation plan. While Archeological Monitor is documenting resources in sensitive areas, Contractor shall relocate work to non-sensitive areas where monitoring is not normally required.

B. If resources are discovered while Archeological Monitor is absent, stop work immediately and report the discovery to the Contracting Officer.

3.5 WORK STOPPAGE

A. Contractor shall plan, schedule, and execute work to prevent stoppages at one area from stopping all work at construction site.

013513.22 ARCHEOLOGICAL PROTECTION - Page 4 of 4

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024296 HISTORIC REMOVAL AND DISMANTLING - Page 1 of 4

SECTION 024296

HISTORIC REMOVAL AND DISMANTLING

PART 1 – GENERAL

1.1 SUMMARY

A. Section includes historic treatment procedures in the form of special types of selective demolition work for designated historic features, including without limitation the following specific work:

1. Dismantling indicated portions of masonry boundary wall components and debris hauling.

2. Removal and dismantling of nonhistoric elements and construction materials lacking structural integrity, and associated debris hauling.

3. Salvage of existing items to be reused or recycled.

1.2 DEFINITIONS

A. Dismantle: To disassemble or detach a historic item from a surface, or a nonhistoric 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.

B. Existing to Remain: Existing items that are not to be removed or dismantled, except to the degree indicated for performing required Work.

C. Remove: To take down or detach a nonhistoric item, using methods and equipment to prevent damage to historic items and surfaces; disposing of items unless indicated to be salvaged or reinstalled.

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

E. Salvage: To protect removed or dismantled items and deliver them to the Contracting

Officer or to the Park maintenance facility, as directed by the Contracting Officer.

1.3 PRECONSTRUCTION MEETINGS

A. Preconstruction Conference(s): Conduct conference(s) at Project site.

1. Review list of items indicated to be salvaged.

2. Verify qualifications of personnel assigned to perform removal and dismantling.

3. Inspect and discuss condition of each construction type to be removed or dismantled.

4. Review requirements of other work that depends on condition of substrates exposed by removal and dismantling work.

024296 HISTORIC REMOVAL AND DISMANTLING - Page 2 of 4

5. Review methods and procedures related to removal and dismantling work, including, but not limited to, the following:

a. Historic removal and dismantling specialist's personnel, equipment, and facilities needed to make progress and avoid delays.

b. Sequencing and tolerances.

1.4 INFORMATIONAL SUBMITTALS

A. Preconstruction Documentation: Show preexisting conditions of adjoining construction and site improvements, that might be misconstrued as damage caused by Contractor's removal and dismantling operations.

B. Removal and Dismantling Historic Treatment Program: Submit 30 days before work begins.

C. List of Items Indicated to Be Salvaged: Prepare a list of items indicated on Drawings to be salvaged for Government's use or for reinstallation. Submit 15 days before preconstruction conference.

D. Inventory of Salvaged Items: After removal or dismantling work is complete, submit a list of items, by type. that have been salvaged.

1. Include general item description and conditions and approximate number of items in each type.

2. As work proceeds, include on the inventory any items of historic importance discovered during the work. Document reasons, if any, why an item or item type indicated to be salvaged was not salvaged.

1.5 QUALITY ASSURANCE

A. Historic Removal and Dismantling Specialist Qualifications: A qualified historic treatment specialist. General selective demolition experience is insufficient experience for historic removal and dismantling work.

B. Removal and Dismantling Historic Treatment Program: Prepare a written, detailed description of materials, methods, equipment, and sequence of operations to be used for each phase of removal and dismantling work, including protection of surrounding and substrate materials and Project site.

C. Regulatory Requirements: Comply with hauling and disposal regulations of authorities having jurisdiction.

1.6 FIELD CONDITIONS

A. Notify Contracting Officer of discrepancies between existing conditions and Drawings before proceeding with removal and dismantling work.

B. Storage or sale of removed or dismantled items on-site is not permitted unless otherwise indicated.

024296 HISTORIC REMOVAL AND DISMANTLING - Page 3 of 4

PART 2 - PRODUCTS - (NOT USED)

PART 3 - EXECUTION

3.1 HISTORIC REMOVAL AND DISMANTLING EQUIPMENT

A. Removal Equipment: Use only hand-held tools, except as follows or unless otherwise approved by Contracting Officer on a case-by-case basis:

1. Light jackhammers are allowed, subject to Contracting Officer's approval.

2. Large air hammers are not permitted.

B. Dismantling Equipment: Use manual, hand-held tools, except as follows or otherwise approved by Contracting Officer on a case-by-case basis:

1. Hand-held power tools are permitted only as submitted in the historic treatment program. They must be adjustable so as to penetrate or cut only the thickness of material being removed.

2. Pry bars more than 18 inches long and hammers weighing more than 2 pounds are not permitted for dismantling work.

3. Cutting torches are not permitted.

3.2 EXAMINATION AND DOCUMENTATION

A. Preparation for Removal and Dismantling: Examine construction to be removed or dismantled to determine best methods to safely and effectively perform removal and dismantling work. Examine adjacent work to determine what protective measures are necessary. Make explorations, probes, and inquiries as necessary to determine condition of construction to be removed or dismantled and location of utilities and services to remain that may be hidden by construction that is to be removed or dismantled.

1. Inventory and record the condition of items to be removed and dismantled for reinstallation or salvage. Enter this information on the submittal of inventory of salvaged items.

B. Documentation for Reconstruction: Before removal or dismantling of existing elements that will be reproduced or duplicated in final Work, make permanent record of measurements, materials and construction details required to make exact reproduction.

C. Survey of Existing Conditions: Record existing conditions by use of preconstruction photographs.

1. Comply with requirements specified in Section 013233 - Photo Documentation.

024296 HISTORIC REMOVAL AND DISMANTLING - Page 4 of 4

3.3 HISTORIC REMOVAL AND DISMANTLING

A. 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.

1. Perform removal and dismantling to the limits indicated.

2. 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.

3. 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.

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

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

D. Masonry Walls:

1. Remove masonry carefully, and erect temporary bracing and supports as needed to prevent collapse of materials being removed.

2. Dismantle top edge and sides before removing wall. Stop removal work and immediately inform CO if any structural elements above or adjacent to the work show signs of distress or dislocation during any phase of removal work.

3. Remove wall in easily managed pieces.

4. During removal, maintain the stability of the partially remaining wall. Notify CO of the condition of temporary bracing for wall if work is temporarily stopped during the wall's removal.

E. Anchorages:

1. Remove anchorages associated with removed items, as applicable.

2. In historic surfaces, patch or repair holes created by anchorage removal or dismantling according to Section that is specific to the historic surface being patched.

END OF SECTION 024296

040120 REHABILITATION OF BRICK MASONRY - Page 1 of 14

SECTION 040120

REHABILITATION OF BRICK MASONRY

PART 1 - GENERAL

A. Section includes historic treatment work consisting of repair, repointing and reconstruction of brick masonry at boundary wall segments, which consist of panels, pilasters, piers, bases, cornices and copings. Work shall include, without limitation:

1. Miscellaneous tasks required for successful repair, repointing and reconstruction work, including without limitation, preliminary mockup(s) for approval, required protections, and rooting, grubbing and re-grading adjacent to wall panels (only if required).

2. Removal of biological growth (e.g., moss, lichen, ivy and/or other plant materials);

3. Replacement of missing and spalled bricks with new bricks and mortar, employing salvaged original bricks or, if insufficient quantity of suitable salvaged brick is available, new custom brick to match existing.

4. Repairing, re-setting and/or rebuilding of offset and/or failed brick assemblies within existing panels, pilasters, piers, cornices and copings.

5. Raking-out loose, friable and debris-filled mortar joints and cracks, followed by preparation and repointing in successive “lifts,” prompt removal of excess mortar, and final cleanup.

6. Raking and repointing cracks and loose, friable, open and poorly executed mortar joints.

7. Final cleaning of exposed masonry surfaces.

B. Related Requirements:

1. Section 014100 “Quality Assurance.”

2. Section 013233 "Photo Documentation" for required photographic documentation before, during and after completion of Work.

3. Section 04 20 00 “Unit Masonry” for new brick for reconstructed boundary wall panels, or portions thereof.

1.2 REFERENCES

A. ASTM:

1. ASTM C144 Aggregate for Masonry Mortar.

2. ASTM C1489 Lime Putty for Structural Purposes

3. ASTM C1713 Mortars for the Repair of Historic Masonry

4. ASTM E2260 Guide for Repointing Historic Masonry

B. American Concrete Institute:

1. ACI 530 - Building Code Requirements for Masonry Structures.

2. ACI 530.1 - Specifications for Masonry Structures.

040120 REHABILITATION OF BRICK MASONRY - Page 2 of 14

C. Preservation Briefs:

1. No. 1 - The Cleaning and Waterproof Coating of Historic Buildings, Robert C. Mack, U.S. Department of the Interior, National Park Service, Preservation Assistance Division, Technical Preservation Services.

2. No. 2 – Repointing Mortar Joints in Historic Brick Buildings, Robert C. Mack, John P.

Speweik, U.S. Department of the Interior, National Park Service, Preservation Assistance Division, Technical Preservation Services.

3. No. 6 – Dangers of Abrasive Cleaning to Historic Buildings, Anne E. Grimmer, U.S.

Department of the Interior, National Park Service, Preservation Assistance Division, Technical Preservation Services.

1.3 DEFINITIONS

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

B. Low-Pressure Spray: 100 to 400 psi (690 to 2750 kPa); 4 to 6 gpm (0.25 to 0.4 L/s).

C. Medium-Pressure Spray: 400 to 800 psi (2750 to 5510 kPa); 4 to 6 gpm (0.25 to 0.4 L/s).

1.4 PRECONSTRUCTION TESTING

A. Preconstruction Testing Service: Engage the mortar manufacturer or other qualified testing agency to perform preconstruction testing on existing mortar as follows:

1. Provide test specimens as indicated and representative of proposed materials and construction.

2. Existing Mortar: Test according to ASTM C 295, modified as agreed by testing service and Contracting Officer for Project requirements, to determine proportional composition of original ingredients, sizes and colors of aggregates, and approximate strength. Use X- ray diffraction, infrared spectroscopy and differential thermal analysis as necessary to supplement microscopical methods. Carefully remove existing mortar from within joints at five locations designated by Contracting Officer.

3. Existing Soiling: Identify sources of existing soiling and staining on masonry surfaces as well as substrates affected.

1.5 PREINSTALLATION MEETINGS

A. Preinstallation Conference: Conduct historic masonry repair and repointing conference at Project site. Review methods and procedures related to repair, repointing and rebuilding historic brick masonry.

1.6 ACTION SUBMITTALS

A. Product Data: For each type of product indicated. Include recommendations for application and use. Include test data substantiating that products comply with requirements.

040120 REHABILITATION OF BRICK MASONRY - Page 3 of 14

B. Samples for Initial Selection: For the following:

1. Pointing Mortar: Submit sets of mortar for pointing in the form of sample mortar strips, 6 inches long by 1/4 inch wide, set in aluminum or plastic channels.

a. Have each set contain a close color range of at least three Samples of different mixes of colored sands and cements that produce a mortar matching the cleaned masonry when cured and dry.

b. Submit with precise measurements on ingredients, proportions, gradations, and sources of colored sands from which each Sample was made.

C. Samples for Verification: For the following:

1. Each type, color and texture of pointing mortar in the form of sample mortar

a. Include with each Sample a list of ingredients with proportions of each.

Identify sources, both supplier and quarry, of each type of sand and brand names of pigments if any.

1.7 QUALITY ASSURANCE

A. Restoration Specialist Qualifications: Engage an experienced masonry restoration and cleaning firm to perform work of this Section. Firm shall have completed work similar in material, design, and extent to that indicated for this Project with a record of successful in-service performance. Experience installing standard unit masonry is not sufficient experience for masonry restoration work. Due to the historic nature of the site, certain aspects of the Work will be carried out with materials/methods not commonplace in modern construction. It is incumbent on the Contractor to furnish mechanics who can and will execute first-class workmanship in the materials and methods specified and will take the necessary precautions to protect identified historic materials, including sound and competent masonry assemblies to remain.

1. At Contractor's option, work may be divided between two specialist firms: one for cleaning work and one for repair work.

2. Field Supervision: Restoration specialist firms shall maintain experienced full-time supervisors on Project site during times that clay masonry restoration and cleaning work is in progress. Supervisors shall not be changed during Project except for causes beyond the control of restoration specialist firm.

3. Restoration Worker Qualifications: Persons who are experienced in restoration work of types they will be performing.

B. Chemical-Cleaner Manufacturer Qualifications: A firm regularly engaged in producing masonry cleaners that have been used for historic structures with successful results, and with factory-trained representatives who are available for consultation and Project-site inspection and assistance at no additional cost.

C. Quality-Control Program: Prepare a written quality-control program for this Project to systematically demonstrate the ability of personnel to properly follow methods and use materials and tools without damaging masonry. Include provisions for supervising performance and preventing damage due to worker fatigue.

040120 REHABILITATION OF BRICK MASONRY - Page 4 of 14

D. Restoration Program: Prepare a written, detailed description of materials, methods, equipment and sequence of operations to be used for each phase of restoration work including protection of surrounding materials and Project site.

1. Include methods for keeping pointing mortar damp during curing period.

2. If materials and methods other than those indicated are proposed for any phase of restoration work, add to the Quality-Control Program a written description of such materials and methods, including evidence of successful use on comparable projects, and demonstrations to show their effectiveness for this Project and worker's ability to use such materials and methods properly.

E. Cleaning Program: Prepare a written cleaning program that describes cleaning process in detail, including materials, methods, and equipment to be used, protection of surrounding materials, and control of runoff during operations.

1. If materials and methods other than those indicated are proposed for any phase of restoration work, add to the Quality-Control Program a written description of such materials and methods, including evidence of successful use on comparable projects, and demonstrations to show their effectiveness for this Project and worker's ability to use such materials and methods properly.

F. Cleaning and Repair Appearance Standard: Cleaned and repaired surfaces are to have a uniform appearance as viewed from 20 feet (6 m) away by Contracting Officer. Perform additional paint and stain removal, general cleaning, and spot cleaning of small areas that are noticeably different, so that surface blends smoothly into surrounding areas.

G. Mockups: Prepare mockups of restoration and cleaning to demonstrate aesthetic effects and set quality standards for materials and execution and for fabrication and installation.

1. Masonry Repair: Prepare sample areas for each type of masonry material indicated to have repair work performed. If not otherwise indicated, size each approximately 48 inches in least dimension. Erect sample areas in existing walls unless otherwise indicated, to demonstrate quality of materials, workmanship, and blending with existing work. Include the following as a minimum:

a. Replacement: Four brick units replaced.

2. Repointing: Rake out joints in 2 separate areas each approximately 36 inches high by 48 inches wide for each type of repointing required and repoint one of the areas.

Allow at least seven days of mortar cure time prior to submitting mockup to CO for approval.

3. Cleaning: Clean an area approximately 25 square feet for each type of masonry and surface condition.

a. Test cleaners and methods on samples of adjacent materials for possible adverse reactions. Do not use cleaners and methods known to have deleterious effect.

b. Allow a waiting period of not less than seven days after completion of sample cleaning to permit a study of sample panels for negative reactions.

4. Approval of mockups does not constitute approval of deviations from the

Contract Documents contained in mockups unless CO specifically approves such deviations in writing.

040120 REHABILITATION OF BRICK MASONRY - Page 5 of 14

5. Approved mockups may become part of the completed Work, if undisturbed at time of Substantial Completion.

H. Preinstallation Conference: Conduct conference at Project site.

1. Review methods and procedures related to masonry restoration and cleaning including, but not limited to, the following:

a. Construction schedule. Verify availability of materials, Restoration

Specialist's personnel, equipment, and facilities needed to make progress and avoid delays.

b. Materials, material application, sequencing, tolerances, and required clearances.

1.8 DELIVERY, STORAGE AND HANDLING

A. Deliver materials neatly stacked on pallets. Store clear of ground with adequate waterproof covering.

B. Store all mortar ingredients in manufacturer's packaging, or when delivered loose, with adequate weatherproof covering.

C. Deliver materials to site in manufacturer's…