SOW 04 06 2023 SCCH West Facade Cleaning.pdf

Building Cleaning – West Facade Sioux City Courthouse 04.06.2023

PROPERTY OF THE UNITED STATES GOVERNMENT FOR OFFICIAL USE ONLY. Do not remove this notice.

Properly destroy or return documents when no longer needed.

STATEMENT OF WORK

SECTION: SUMMARY OF WORK

The contractor shall furnish all necessary labor, material, equipment, and supervision to clean all limestone on the West façade of the Courthouse. Work is located at the Sioux City Courthouse, 320 6th Street, Sioux City, IA 51101.

SECTION: CONTRACT AUTHORITY

A. Contracting Officer (CO). The CO has the responsibility for the administration of this contract. The CO alone, without delegation, is authorized to take action on behalf of the Government to amend, modify or deviate from the contract terms, conditions, requirements, specifications, details and/or delivery schedules. However, the CO may delegate certain other responsibilities to authorized Government representatives.

B. Contracting Officer's Representative (COR). The COR shall be appointed by letter from the CO. The CO uses CORs are the primary Government representatives for the administration of the contract. CORs shall have proper training and experience in inspecting contracts, but do not have the authority to modify the contract.

SECTION: REQUIREMENTS

Prior to submitting their bid, Contractors shall visit the site and perform a thorough site inspection. The contractor shall inspect the site to become familiar with the existing conditions relating to the work to be performed and the difficulties and restrictions to the work to be performed. The contractor shall notify the CO/COR of any conditions that prevent the suitable completion of these requirements. All work shall be performed in accordance with attached specifications.

Description of Work

The work includes cleaning the limestone of a nearly 87 year old building that is listed on the National Register of Historic Places. This Statement of Work (SOW) includes specifications for the general cleaning of limestone which are located at the end of this document. As this is a performance SOW, the contractor is expected to utilize its knowledge and expertise to propose and deliver an appropriate and cost-effective cleaning solution. If the Contractor’s cleaning process differs from that noted in the specifications, the Contractor shall clearly note and outline those differences as a part of their bid.

04.06.2023

PROPERTY OF THE UNITED STATES GOVERNMENT FOR OFFICIAL USE ONLY. Do not remove this notice.

Properly destroy or return documents when no longer needed.

The work includes, but is not limited to the following:

1. Clean all limestone on the West façade including limestone at all entrance areas. The

West face the limestone shall be cleaned.

The following directions shall be adopted as part of the work requirements:

• Limestone sealer is not required and shall not be used.

• The granite facing at the base of the façade shall not be cleaned. The Contractor is responsible for protecting, if necessary, granite base from chemical run-off.

• Bronze and brass alloy spandrels, window trim, and accents shall be protected from chemical overspray and chemical run-off. Any non-limestone façade element, if affected by chemical cleaners utilized by the Contractor, shall be protected.

• Work shall be performed only on the weekend days.

• Site elements including painted handrails and granite paving shall be protected from chemical overspray and run-off if necessary. Bronze lanterns shall be protected.

Work area – West Side of Building Provide and submit a Pandemic Plan, ensuring all work performed in accordance with Centers for Disease Control (CDC) Guidelines, to the COR for acceptance. The Pandemic Plan Review Checklist is available upon request.

SECTION: SUPPLIES, MATERIALS AND EQUIPMENT.

Materials, supplies and equipment used shall be commercially available products of reputable manufacturer or suppliers and shall be approved by the COR prior to starting the work. The contractor shall not use any material which the COR determines would be unsuitable for any purpose. The contractor shall provide submittals for all project equipment and materials for approval prior to execution of any work.

SECTION: WORK RESTRICTIONS

CONTRACTOR USE OF PREMISES: During the work period the Contractor shall limit use of the premises to the north façade and north site areas. If Option A is exercised, the roof area will be included as part of the project / work area. The following guidance shall be adhered to:

1. Prior to construction, provide the COR a written list of employees and subcontractor employees that will be working on the project during the contract period.

2. Take precautions to protect the building, its occupants, and the public during the work period. The Contractor is responsible to provide all labor and materials for dust, chemical run-off and overspray control, provide adequate barriers to prevent Government Employees or the public from entering the project area, all signage indicating necessary requirements for entering the project area, and any other precaution necessary to provide a safe environment for Contractor personnel, Government employees and the public.

3. Space in the South parking area will be made available for the Contractor’s use on weekend days only. The Contractor will not be permitted to use parking or on-site areas during weekdays.

4. If necessary, daily issuance of keys and / or key cards will be provided by an on-site GSA field office representative. Keys will only be issued to the General Contractor unless the General Contractor provides a list of sub’s authorized to sign for keys. Keys will only be issued to people that have received a favorable HSPD-12 security clearance. Keys must be returned to the GSA office daily.

5. Use of the loading dock facilities will be shared with Government activities on a first-come-first-served, wait-your-turn basis. The Contractor will only be able to use the loading dock area on the weekend days.

6. No apparatus with an open flame, grinding that creates sparks, or grinding that creates excessive dust is allowed to be used within or on-site of the facility without prior receipt of a burn permit. Burn permits are required for each separate occurrence. Burn permits will be issued on a daily basis by a GSA representative and must be returned at close of work each day.

CONTRACT PERIOD: All work shall be completed within (60) calendar days of notice to proceed.

WORKING DAYS / HOURS: Work shall be completed during weekend days only.

All work shall be scheduled through the COR at a minimum of two weeks in advance.

SECTION: SECURITY CLEARANCE

All personnel performing work under the Contract on the Project site must obtain an Enter on Duty (EOD) determination before they will be granted access to the site. Refer to the Construction Contract Agreement Section III, Terms and Conditions, for HSPD-12 suitability investigation requirements for Contract employees requiring access to the facility. Contractor will be required to provide a designated point of contact for all security related processing. It is encouraged that the designated point of contact to attend clearance processing online meeting (1.5hrs) for instructions on processing clearances.

Security Clearances will only be required if entrance into the building in required for the work performed. If entrance is not required than a clearance in not required.

SECTION: BID SUBMITTALS

SUBMITTALS: As part of their bid, the Contractor shall provide the following:

1. Work schedule estimate

2. A description of the Contractor’s cleaning procedures (if different than the procedures outlined in the general Cleaning of Exterior Limestone specifications located at the end of this SOW).

3. List cleaning materials to be utilized for each task.

4. Non-Limestone Façade Elements’ Protection plan: Provide a description of how the bronze/ brass alloy window trim located at building entrances will be protected. If cleaning chemicals will affect glass, standard window trim, granite at base of façade, or other non-limestone façade elements, provide a description of how these items will be protected during the work.

SECTION: SUBMITTALS AND SUBSTITUTIONS

SUBMITTALS: Contractor shall provide submittals to the COR for approval within 10 days after receiving notice to proceed. No work shall proceed until submittals are approved by the COR. The Contractor shall submit to the COR for review prior to commencement of work.

1. Work Schedule, including:

a. Task with start, stop & duration

2. Security Clearance Status Verification Form (if necessary)

3. Required material submittals

PRODUCT SUBSTITUTIONS: For all items listed with a Brand Name or Equal, refer to FAR 52.211-6 Brand Name or Equal. An Offeror who proposes to submit a quote based on an alternate or substitute construction material shall provide cut sheets and sufficient technical information to ensure the material meets all salient characteristics of the building materials specified in this specification with their quote. The alternate or “equal” material information must be provided on or before the due date of the Request for Quote (RFQ).

SECTION: QUALITY REQUIREMENT

All work to be performed under this contract shall be in strict compliance with the manufacturers’ written recommendations and all nationally or locally recognized governing bodies. The Contractor shall without additional expense to the Government, be responsible for obtaining any necessary licenses and permits, and for complying with any Federal, State, and municipal laws, codes and regulations applicable to the performance of this work. If two codes are in conflict, the most stringent will be applied.

All work to be performed under this contract shall be executed in a careful and orderly manner by workmen skilled in their respective trades or class of work. The work shall consist of performing all new work and doing all necessary removing, patching, filling-in, and repairing of existing work specified to be performed. The materials and methods of application for new work shall be performed in compliance with standard trade practices.

All work shall be completed in compliance with Building Standards. Lists of Building Standards are available in the Field Office upon request.

SECTION: TEMPORARY FACILTIES AND CONTROLS

UTILITY SHUTDOWN: All utility (electrical, water, sanitary, sprinkler, or HVAC) shutdowns must be scheduled with the COR, at a minimum of seventy-two (72) hours in advance, and may be required to be completed after hours.

SECTION: EXECUTION REQUIREMENTS

All work must be performed by the Contractor unless noted otherwise.

WORKMANSHIP STANDARDS: The Contractor shall ensure that personnel performing tasks required under this contract are skilled and knowledgeable in the methods and craftsmanship needed to produce journeymen level of workmanship. Any work performed by the Contractor that is found to be faulty or fails to meet acceptable performance / construction standards shall be reperformed by the Contractor at no additional cost to the Government.

CLEAN-UP: The Contractor shall be responsible for removal and legal disposal of all debris created by the work specified herein from the premises. The Contractor shall clean up the immediate area on a daily basis and must keep the area safe at all times.

SECTION: CLOSEOUT

SUBSTANTAL COMPLETION is defined as that state when the Contractor has complied with the Contract Requirements, except for minor deviations, and the project is sufficiently complete and capable of being occupied and used by the Government for the intended purpose.

INSPECTION PROCEDURES: On receipt of the Contractor’s request for inspection, the COR will either proceed with the inspection or advise the Contractor of unfilled requirements. If the Contractor is aware of any unfilled requirements prior to the inspection, the Contractor shall provide a list of incomplete items with a reason work is not complete. The COR will notify the Contractor once the project is substantially complete. This does not relieve the Contractor from correcting all punch list items. The Government may withhold funds until all items included in the Contract have been successfully completed.

SECTION: RECORD DOCUMENTS

1. Warranty, including all labor and material, dated one year from substantial completion.

FINAL CLEANING: Employ experienced workers or professional cleaners for final up. Clean areas and surfaces (if any) that were affected by the façade work to the condition prior to the beginning of the façade work. Remove all temporary protection or facilities installed for the protection of new work and all barriers erected around the construction area for dust or fluid control, noise, fall protection, or any other barrier that was required for the work.

SPECIFICATIONS – GENERAL CLEANING OF EXTERIOR LIMESTONE

PREFACE

The cleaning or removal of stains from stone may involve the use of liquids, detergents or solvents which may run off on adjacent material, discolor the stone or drive the stains deeper into porous stones. Use the products and techniques described here only for the combinations of dirt/stain and stone necessary for the required work.

PART 1---GENERAL

1.01 SUMMARY

A. This procedure includes guidance on the removal of surface dirt and environmental pollution on exterior limestone. This work shall be accomplished by an experienced Contractor.

PART 2---PRODUCTS

2.01 MANUFACTURERS

ProSoCo, Inc. Lawrence, KS 66117

2.02 MATERIALS

A. Limestone (unpolished): Sodium hydroxide, (pH 14), undiluted.

1. For heavy high pollution stains, an alkaline-based prewash such as "Sure Klean

766 Limestone & Masonry Prewash" or equal, follow manufacturer's instructions including rinse cycle.

2. Followed up with "Sure Klean Limestone & Masonry Afterwash" or equal, as per manufacturer's instructions.

B. Clean, potable water (heated to a temperature effective and tested for cleaning procedure).

2.03 EQUIPMENT

A. Pressure water rinsing equipment (measuring between 100 and 400 psi for low-pressure;

between 400 and 1000 psi for medium pressure).

B. Fan-type spray tips (15 to 45-degree fan spray).

C. Stiff fiber-bristle brushes.

PART 3---EXECUTION

3.01 EXAMINATION

A. Examine site conditions to determine that current drainage is sufficient for adequately and safely removing cleaning waste and run-off from the site.

B. Test-clean a small, inconspicuous area chosen by the COR to determine effectiveness of cleaning methods, materials, equipment and working pressures selected before proceeding with cleaning operations on larger areas. Adjust methods, materials, equipment, pressures, etc. as necessary. Re-test as needed. Do not proceed until an acceptable cleaning operation has been approved and fully documented by the COR.

3.02 PREPARATION

A. Protection:

1. Protect surrounding materials on the site and adjacent building surfaces from coming in contact with the cleaning materials and run-off.

2. Provide workers with necessary protection against cleaning chemicals, overspray and run-off.

3. Prevent cleaning chemicals from coming in contact with any painted, polished or metallic surfaces.

4. Divert flow of run-off to drains in compliance with municipal codes. Comply with municipal codes regarding containment and disposal of cleaning materials.

B. Surface Preparation:

1. Before proceeding with cleaning operations, remove all miscellaneous hardware, anchors and bird excrement from the surface to prevent any discoloration. Note:

bird excrement that comes in contact with cleaning solution will leave a permanent dark-colored stain on the surface.

2. Check for open holes and joints in surface and bring to the attention of the COR.

Prevent water and cleaning solutions from penetrating deeply into the wall.

3. Clean the limestone working from bottom to top.

3.03 ERECTION, INSTALLATION, APPLICATION

NOTE: WHEN CLEANING, AVOID OVERCLEANING. AIM FOR ACHIEVING 85%

CLEAN. MOST DAMAGE OCCURS WHEN ATTEMPTING TO CLEAN THE LAST 15%.

NOTE: DO NOT TREAT THE SURFACE WITH ACID CLEANER MORE THAN ONCE.

A. Pre-wet limestone surface using a low-pressure wash (between 100 and 400 psi).

B. Apply a heavy coating of limestone pre-wash using a soft, nylon bristle brush. Follow manufacturer's applications instructions.

C. Allow to stand for one hour or as long as determined by testing.

D. Thoroughly rinse the surface using high pressure water (between 800 and 1000 psi) until all suds have disappeared.

1. Rinse all corners, moldings, and interstices to remove all traces of chemical without damaging surrounding materials.

2. Rinse water should be heated to 150-180 degrees Fahrenheit or as determined most effective during testing.

E. While surface is still wet from rinsing off pre-wash, apply limestone after wash with a soft, fiber bristled brush.

1. Dilute limestone after wash with as much water as determined effective during testing.

2. If surface has begun to dry, re-wet before applying after wash.

3. Cover all corners, moldings, and interstices of the limestone.

F. Allow to stand for 3-5 minutes or as long as determined by testing.

G. Thoroughly rinse the surface using high pressure water (between 400 and 1000 psi), with a water flow of 6-8 gallons per minute.

1. Rinse all corners, moldings, and interstices to remove all traces of chemical without damaging surrounding materials.

2. Heat rinse water to a temperature determined most effective during testing.

END OF SPECIFICATIONS

END OF SOW

UTILITY SHUTDOWN: All utility (electrical, water, sanitary, sprinkler, or HVAC) shutdowns must be scheduled with the COR, at a minimum of seventy-two (72) hours in advance, and may be required to be completed after hours.