A02.12 PWS.pdf

COASTAL AND HYDRAULICS LABORATORY (CHL)

PERFORMANCE WORK STATEMENT

FRF Concrete Piling and Beam Repair

1.0. General: This performance work statement (PWS) describes the non-personal services required by the Engineering Research and Development Center (ERDC) Coastal and Hydraulics Laboratory (CHL) located in Vicksburg, Mississippi.

2.0. Background: The Field Research Facility (FRF) located in Duck, North Carolina is a remote field station of the United States Army Corps of Engineers (USACE) Engineering Research and Development Center (ERDC). The original main office building (building 0001) sits on the now 45-year-old elevated concrete slab supported by concrete beams and piles. This platform consists of a 132’ X 80’X 8” reinforced monolithic slab roughly 9’ above grade supported by stout cast in place beams and 77 pre-cast and prestressed 12” square piles. A reinforced concrete ramp which abuts the building platform provides access to a 1860’ research pier. This approach ramp consists of four 40’ X 16’ spans, each constructed of two side by side 40’ precast T-shaped girders that are 6’ 6” wide and joined in the middle by a 3’ wide cast in place reinforced slab. Each 40’ span is supported on the ends by stout cast in place bents which sit atop 12” square piles. While most of the structure appears to be in good condition with minor shrinkage cracks, several 12” platform piles and the approach ramp beams exhibit moderate and major spalling and delamination.

In Oct-Nov 2023 a comprehensive concrete evaluation of the approach ramp and building platform was conducted to include: a visual and tactile survey of all concrete members, use of surface penetrating RADAR, Impact-Echo testing, concrete chloride content testing, carbonation testing, compressive strength analysis, petrographic analysis, and half-cell corrosion potential tests. The final report included field observations, material testing reports, a structural analysis, findings, and recommendations. A summary of this report is included in this announcement (Enc 1). The full report is available upon request made to the Contracting Officer’s Representative (COR). The cracking and spalling of concrete were found to be caused by rusting rebar effected by chloride penetration. The structural analysis concluded that the existing condition supported the intended use of load. A recommendation was made; however, to repair the ramp beams and platform piles to maintain its safety. In April 2024, the USACE - Philadelphia District provided a Design Load Rating of the pier structure including the approach ramp. A recommendation was made to post a maximum axle weight of 2 tons (2 kips per wheel), which matches the original design criteria.

This concrete repair project requires the contractor to provide stamped engineering drawings.

Any alteration, substitution, or increase to the materials listed below or task procedure listed below must be approved by the on-site COR. As-built drawings, shop drawings, and original specifications shall be provided by the site’s facility manager and made available for review. The contractor and contractor engineer are responsible for the determination of shoring requirements and, if applicable, a structural support plan. The site is located inside the security fence compound at the FRF. Domestic water and electricity for project activities shall be provided by the FRF. The contractor shall coordinate all work with the site COR to gain access and confirm scheduling. All onsite work shall be performed during the work week from 0700 to 1700, unless prior approval is granted by the COR. A site visit is available to the contractor, if desired, prior to providing a quote.

3.0. Requirements and Deliverables:

Task 1. Repair Ramp Beams. Quantity 8 (2’x 2’x40’) The precast beams contain two rows of 6 #10 rebar located near the bottom of the beams.

1.1. Remove loose and delaminated concrete preparing surface to ACI 546R standards.

This may be achieved utilizing industry typical tools, such as, chipping hammers, pneumatic hammers, abrasive blasting, and high-pressure hydro blasting machines.

Care should be taken to not leave microcracking on the prepared substate and not to damage rebar. Where rebar is encountered, undercut bar by ¾” to allow repair material to encapsulate the bar. Prepare boundaries at least ¾” deep to prevent feather edges. Keep geometry layout of repair area simple. Prepared surfaces should have a roughened profile to achieve a mechanical bond. Surface preparation of the substrate should create a Concrete Surface Profile (CSP) between 5 – 10 or appropriate to meet the manufacturers specified requirements. Total removal of beam area up to 25% or 320 cu/ft.

1.2. After initial removals, surfaces should be resounded for any missed delamination and voids. Chip away any unsound areas to Task 1. 1.1 specifications.

1.3. Power-wash beams, bents, and piles. Repair surface should have an open pore structure and be free of dust. Clean exposed rebar to “white metal”.

1.4. Install Type 1A cathodic protection anodes, Vector Corrosion Galvashield XPX (or equivalent) spaced no more than 10” apart on exposed rebar within the patch area.

Install up to 140 anodes following manufacturer’s specifications.

1.5. Inject epoxy into all cracks larger than .3mm before applying corrosion inhibitor.

Crack repair up to 300 linear feet.

1.6. Apply Sika Ferro Guard 908 (or equivalent) penetrating corrosion inhibitor to all exposed surfaces of concrete and rebar following manufacturer’s specifications.

Let dry.

1.7. Wet all surfaces to be patched to allow for a SSD (Saturated Surface Dry) condition.

Brush coat patch material onto all surfaces to be patched. Patch cracks, spalled areas, and voids with a low shrinkage (less than 0.05%) thermal equivalent cementitious material with a compatible stress-strain relationship with the existing material (submittal to be approved by COR). Placement technique must deliver the selected material with enough force to achieve a satisfactory bond and completely fill all voids.

Cover patches with burlap or plastic to allow for at least 3 days of curing..

1.8. Apply two coats of an Acrylic protective coating, such as Sika Guard 670W (or equivalent) following manufacturer’s specifications.

Deliverable: 8 concrete beams repaired: all loose material removed not to exceed 25%, power washed, anodes installed, corrosion inhibitor applied, cementitious concrete patches applied, cracks filled with epoxy, and two coats of protective coating applied.

Contractor provides as built drawings.

Task 2. Repair Pilings. Quantity 28 piles (1’x1’x 6’) The pre-stressed piles contain six 7/16” strands with 5-gauge spiral ties.

2.1. Remove loose and delaminated concrete preparing surface to ACI 546R standards.

This may be achieved utilizing industry typical tools, such as, chipping hammers, pneumatic hammers, abrasive blasting, and high-pressure hydro blasting machines. Care should be taken to not leave microcracking on the prepared substate and not to damage reinforcing strands. Where strands are encountered, undercut strand by ¾” to allow repair material to encapsulate the strand. Prepare boundaries at least ¾” deep to prevent feather edges. Keep geometry layout of repair area simple. Prepared surfaces should have a roughened profile to achieve a mechanical bond. Surface preparation of the substrate should create a Concrete Surface Profile (CSP) between 5 – 10 or appropriate or meet the manufacturers specified requirements. Total removal of pile area up to 25% or 42 cu/ft.

2.2. After initial removals, surfaces should be resounded for any missed delamination and voids. Chip away any unsound areas to Task 1. 1.1 specifications.

2.3.Power-wash piles. Repair surface should have an open pore structure and be free of dust. Clean exposed Strands to “white metal”.

2.4.Install cathodic protection anodes, Vector Corrosion Galvashield CCX (or equivalent) 6 per pile spaced 12” apart drilled through the center of the pile and alternately inserted on the perpendicular. Wire ends of anodes must be connected to wire reenforcing strand following manufacturer’s specifications.

2.5..Apply Sika Ferro Guard 908 (or equivalent) penetrating corrosion inhibitor to all exposed surfaces of concrete and rebar following manufacturer’s specifications. Let dry.

2.6.Wet all surfaces to be patched to allow for a SSD (Saturated Surface Dry) condition.

Brush coat patch material onto all surfaces to be patched. Patch cracks, spalled areas, and voids with a low shrinkage (less than 0.05%) thermal equivalent cementitious material with a compatible stress-strain relationship with the existing material (submittal to be approved by facility manager). Placement technique must deliver the selected material with enough force to achieve a satisfactory bond and completely fill all voids. Cover patches with burlap or plastic to allow for at least 3 days of curing.

2.7. Apply two layers of carbon fiber fabric to the piles from the top of the piles down 6’ to the specifications provided by the contractor engineer. (Note: If it is determined by the contractor engineer that one pile only requires 4’ and another pile requires 8’ of wrap, the adjustment may be made).

2.8. Apply two coats of an Acrylic protective coating, such as Sika Guard 670W (or equivalent) following manufacturer’s specifications.

Deliverable: 28 pilings repaired: all loose material removed not to exceed 25%, power washed, anodes installed, corrosion inhibitor applied, cementitious concrete patches applied, cracks filled with epoxy, two layers of carbon fiber applied with epoxy, and two coats of protective coating.

Contractor provides as built drawings.

Material Requirements:

Cementitious Material, (Estimate based on 25% volumetric loss)

Up to 362 cu/ft.

Type 1A zinc anodes, Vector Corrosion Galvashield XPX (or equivalent)

Up to 140

Type 2A zinc anodes Vector Corrosion Galvashield CCX (or equivalent)

Up to 168

Carbon Fiber Fabric (20oz.) estimate 100 gal Carbon Fiber Fabric (20oz.) 1,344 sq/ft

Penetrating Corrosion Inhibitor, Sika Ferro Guard 908 (or equivalent) estimate 25 gal

Topcoat estimate 12 gal

5.0. Place of Performance: Work will be performed at the CHL FRF located at:

U.S Army Corps of Engineers Engineer Research and Development Center 1261 Duck Road Kitty Hawk, NC 27949

6.0. Period of Performance: Work shall be coordinated with the COR and TPOC to begin within 30 working days of award and to be completed within 120 days (unless explicitly stated otherwise in the proposal concerning delays on parts) to ensure proper access and mitigate any conflicts with the scheduled access.

7.0. Government Furnished Equipment: None

8.0. Travel: Contractor will travel to the CHL FRF to complete all work.

9.0. CAC Cards: N/A

10.0. Access to ERDC or DOD IT Systems: N/A

11.0. Access to Government Installations: Contractor will have access to the Government facility to complete work.

12.0. Access to Government Information: N/A

13.0. Meetings and Reviews:

1. A kick-off meeting shall be held with COR and TPOC within fifteen days of the contract award date to solidify the project schedule, project requirements, communications, and deliverables.

2. Weekly meetings will be held with the contractor to determine progress regarding ongoing work and upcoming requirements.

14.0. Reports/Deliverables: The Contractor shall submit the following to the COR: Monthly Progress Reports – One typed letter report describing progress on the project tasks, including the percentage completed for each task. The report shall be due on the 15th day of the month and shall be transmitted via electronic mail to the COR and TPOC. No payment will be approved unless the government has received the progress report for that month.

15.0. Security Requirements.

15.1. General security requirements and guidance: The security requirements described below apply to all contract personnel (including employees of the prime Contractor (“Contractor”) and all subcontractor employees) supporting the performance requirements of this contract. The Contractor is responsible for compliance with these security requirements. Questions regarding security matters shall be addressed to the designated Government representative (e.g., Contracting Officer Representative (COR), Requiring Activity (RA) representative, or Contracting Officer (if a COR or other RA representative is not appointed)). Contract personnel are critical to the overall security and safety of US Army Corps of Engineers (USACE) installations, facilities and activities, and security awareness training contributes to those efforts. The Department of Defense (DoD) and Army security training requirements specified below, if applicable, are performance requirements; all applicable contract personnel shall complete initial training within 30 days of contract award or the date new contract personnel begin performance on the contract. Within five business days from the completion of training, the Contractor shall provide written documentation (e.g., email or memorandum) to the Government representative. The documentation shall include the names of contract personnel trained and which training they completed; the Contractor shall maintain training records as part of their contract files and be prepared to provide copies of training certificates to the Government representative. Contractor personnel and vehicles are subject to search when entering federal installations. Additionally, all contract personnel shall comply with Force Protection Condition (FPCON) measures, Random Antiterrorism Measures (commonly referred to as “RAMs”), and Health Protection Condition (HPCON) measures. The Contractor is responsible for meeting performance requirements during elevated FPCON and/or HPCON levels in accordance with applicable RA plans and procedures --this includes identifying mission essential and non-mission essential personnel. In addition to the changes otherwise authorized by the changes clause of this contract, should the FPCON or HPCON levels at any individual facility or installation change, the Government may implement security changes that affect contract personnel. The Contractor shall ensure all contract personnel are aware of their security responsibilities, including any site-specific requirements identified in local policies or procedures.

15.2. Physical security and access control requirements: All contract personnel requiring physical access to a federal installation or facility shall comply with the access control procedures of that location. Contract personnel requiring unescorted access to meet contract performance requirements on a DoD installation in the US shall be vetted by the installation/facility Provost Marshal/Directorate of Emergency Services/Security Office using the National Crime Information Center-Interstate Identification Index (commonly referred to as “NCIC-III”) and Terrorist Screening Database (commonly referred to as “TSDB”). Contract personnel shall comply with all personal identity verification requirements specified in installation/facility policies and procedures. Contract personnel who do not meet requirements for unescorted access to USACE facilities shall coordinate escorted access with the Government representative, as needed. Contract personnel who receive keys, access cards, or lock combinations that provide access to government-owned property shall comply with key and lock control procedures of the

RA.

15.3. Pre-screen candidates using E-Verify Program: Contractors shall comply with the requirements set forth in FAR clause 52.222-54 Employment Eligibility Verification and FAR Subpart 22.18 in using the E-Verify Program at (https://www.e-verify.gov/) (website subject to change) to meet the contract employment eligibility requirements. Contractors are encouraged to cooperate with Federal and State agencies responsible for enforcing labor requirements to include eligibility for employment under United States immigration laws in accordance with FAR 22.102-1(i). An initial list of verified/eligible candidates shall be provided to the COR no later than three business days after the initial contract award. When contracts are with individuals, the individuals will be required to complete a Form I-9, Employment Eligibility Verification, and submit it to the Contracting Officer to become part of the official contract file.

16.0. Performance Metrics. This is a performance-based acquisition; therefore, performance metrics will be used. Contractor performance will be measured based on quality of customer satisfaction, timeliness of submission of deliverables, and timeliness of submission of proper invoices. The Quality Assurance Surveillance Plan (QASP) provides a systematic method to evaluate performance for the stated contract. The QASP explains the following:

• What will be monitored.

• How monitoring will take place. Who will conduct monitoring.

• How monitoring efforts and results will be documented.

The QASP does not detail how the contractor accomplishes the work. Rather, the QASP is created with the premise that the contractor is responsible for management and quality control actions to meet the terms of the contract. It is the Government’s responsibility to be objective, fair, and consistent in evaluating performance. In addition, the QASP should recognize that unforeseen and uncontrollable situations may occur.

The QASP is a living document and, as such, may be changed as needed. However, the Contracting Officer must approve changes. The COR will submit recommended changes to the Contracting Officer for approval.

The QASP shall comply with the Federal Acquisition Regulation (FAR), Subpart 37.6, Performance Based Acquisition and 46.4, Government Contract Quality Assurance. In addition, FAR, Subpart 46.103, Contracting Officer Responsibilities, states that agencies shall develop quality assurance surveillance plans when acquiring services.

The Contractor shall provide their own Quality Management Plan clearly stating the assurance of work quality according to their policies. It is to be submitted at the time of the contractor proposal for the IDIQ and each task order.

17.0. Performance Requirements Summary:

Table 1. Performance Ratings and Criteria

Task/Deliverable Standard/AQLs Inspection(s) Rating Incentive/Disincentive

Task 1:

Repair Ramp Beams.

Quantity 8 (2’x 2’x40’) The precast beams contain two rows of 6 #10 rebar located near the bottom of the beams.

Deliverables:

8 concrete beams repaired: all loose material removed not to exceed 25%, power washed, anodes installed, corrosion inhibitor applied, cementitious concrete patches applied, cracks filled with epoxy, and two coats of protective coating applied.

Contractor provides as built drawings.

All 8 Concrete beams were repaired per task requirements.

The Contractor provided as built drawings containing details of repairs.

List the terms of inspection for Task 1

Who: COR will inspect all deliverables.

Standard(s):

Inspection applies to all standards and submittals and the ERDC makes every effort possible to provide feedback promptly. However, the contractor is advised to allow at least 10 business

Rating task completion according to Table 1 performance standards.

Rating task completion according to Table 1.

If the Performance Standards are found to be non-compliant the Contractor / Vendor is responsible for correcting the task(s) to a Performance Rating above Unsatisfactory and the resulting action will require completion of the task(s) at no additional cost or extension to the Period of Performance.

Task 2:

Repair Pilings.

Quantity 28 piles (1’x1’x 6’) The pre-stressed piles contain six 7/16” strands with 5-gauge spiral ties.

Deliverables:

28 pilings repaired:

all loose material removed not to exceed 25%, power washed, anodes installed, corrosion inhibitor applied, cementitious concrete patches applied, cracks filled with epoxy, two layers of carbon fiber applied with epoxy, All 28 pilings were repaired per task requirements.

The Contractor provided as built drawing containing details of repairs.

Who: COR will inspect all deliverables.

Standard(s):

Inspection applies to all standards and submittals and the ERDC makes every effort possible to provide feedback promptly. However, the contractor is advised to allow at least 10 business

Rating task completion according to Table 1 performance standards.

Rating task completion according to Table 1.

If the Performance Standards are found to be non-compliant the Contractor / Vendor is responsible for correcting the task(s) to a Performance Rating above Unsatisfactory and the resulting action will require completion of the task(s) at no additional cost or extension to the Period of Performance.

and two coats of protective coating.

Contractor provides as built drawings.

Performance

Rating Criteria

Excellent or

Outstanding

Performance meets contractual requirements and exceeds many to the government's benefits. The contractual performance of the element or sub-element being assessed was accomplished with no problems and contractor actions were highly effective.

Very Good

Performance meets contractual requirements and exceeds some to the government benefits. The contractual performance was accomplished with few minor problems for which corrective actions taken by the contractor were effective.

Good Performance meets contractual requirements. The contractual performance contains some minor problems for which corrective actions taken by the contractor were satisfactory.

Marginal

Performance does not meet some contractual requirements. The contractual performance reflects a serious problem for which the contractor has not yet identified corrective actions. The contractor's proposed actions appear marginally effective or were not fully implemented.

Unsatisfactory

Performance does not meet contractual requirements and recovery is not likely in a timely manner. The contractual performance contains serious problem(s) for which the contractor's corrective actions appear or were ineffective.