ATTACHMENT 1 STATEMENT OF WORK.pdf

STATEMENT OF WORK

Bridge Repair

Atlantic Oceanographic & Meteorological Laboratory (AOML) 4301 Rickenbacker Causeway, Miami (Virginia Key), Florida

Background:

The National Oceanic and Atmospheric Administration (NOAA) is one of the bureaus of the U.S. Department of Commerce, a cabinet level agency of the executive branch of the United Statement of America. In the 21st century, every aspect of the NOAA mission faces new urgency given the intensifying national needs of the environment, the economy, and public safety. The NOAA role in facing these challenges is to assess and predict environmental changes, protect life and property, provide decision makers with reliable scientific information, manage national living marine and coastal resources, and foster global environmental stewardship.

The Atlantic Oceanographic and Meteorological Laboratory (AOML), located in at 4301 Rickenbacker Causeway, Miami, FL 33149 on the Virginia Key conducts research to understand the physical, chemical, and biological characteristics and processes of the ocean and the atmosphere, both separately and as a coupled system. The principal focus of these investigations is to advance knowledge that leads to more accurate forecasting of severe storms, better use and management of marine resources, better understanding of the factors affecting both climate and environmental quality, and improved ocean and weather services for the nation.

General Information:

This solicitation is for repairs to a bridge used for both walking and hand cards to the building’s freight elevator at the Atlantic Oceanographic and Meteorological Laboratory (AOML) located at 4301 Rickenbacker Causeway, Miami, FL 33149 on the Virginia Key. These bridges have excessive spalling and ~4 ft section of concrete has fallen off from the underside of the bridge.

The Contractor shall be responsible for providing all personnel, equipment, tools, materials, supervision and documentation necessary to perform the duties required to repair the bridge within this statement of work. Any travel and/or accommodations necessary to submit a bid and/or perform the work under this award shall be included as part of your bid.

Specific Requirements:

Provide the following engineering services for the lower bridge with the option to complete upper bridge repair. Provide a qualified team of engineers and concrete labors (defined as The Team) to effectively repair the bridges.

Base Contract: Lower bridge (ground level)

1. GPR scanning of the bridge deck to locate existing reinforcing in the structural slab and a corrosion potential study to determine the overall extent of rebar damage.

2. Testing of concrete core samples for possible chloride contamination.

3. Review if any waterproofing membrane is present.

4. Chip and remove around spalled area to sound concrete on walking surface of lower bridge and underneath lower bridge. See below for further info.

5. Anti-corrosion coatings on exposed rebar to rust proof all exposed rebars.

6. Install and splice rebars.

7. Install Embedded Galvanic Anodes to exposed rebars. This unique Anode will protect rebars getting rusted in futures.

8. Apply bonding agent to all repaired concrete.

9. Patch all repair areas with high strength concrete or similar product. Slope concrete flooring for proper drainage out the side wall drains.

10. Apply a Urethane deck coating installation from 3ft before the bridge to elevator.

Option: Upper bridge (1st floor)

11. Chip and remove topping slab and tile overburden from walkway and stairs.

12. Chip and remove all metal edges on stairs

13. Chip and remove around spalled area to sound concrete on walking surface

14. Rust proof all exposed rebars.

15. Install and splice rebars as need for repair.

16. Install four side drains evenly spaced on bridge that allow for rain water to evacuate the walking area into pond below. (must not evacuate to lower bridge.

17. Apply bonding agent to all repaired concrete.

18. Install topping slab with high strength concrete. Slope concrete flooring for proper drainage out the side wall drains.

19. Install/Rebuild stairs with no metal edge with high strength concrete

20. Install all new joint sealant between main supports and bridge

21. Apply a Urethane deck coating to entire upper level and stairs.

SPALL REPAIR

Preparation

Identification of Extent of Concrete Removal

a. Configure geometry of removal area to maximize the use of right-angle geometry, avoiding reentrant corners, and to obtain uniformity of depth. Determine the depth, location, and size of reinforcing bars prior to removal of concrete.

b. Perform visual inspection and hammer tapping or other methods acceptable by the Contracting Officer to identify cracked, delaminated, spalled, disintegrated, and otherwise unsound concrete for removal. Mark boundaries of repair area before concrete removal.

c. Inspect the marked boundaries with the Contracting Officer prior to commencing with the concrete removal.

Shoring and Formwork

a. Provide necessary shoring and formwork. Ensuring no debris drops into the water below bridge.

Concrete Removal

a. Remove concrete from repair areas to indicated depth and profile. Notify Contracting Officer if additional delaminated, fractured, or unsound concrete is present.

b. Do not damage embedded reinforcing and adjacent concrete. The removal methods must produce minimal microcracking (bruising) of the prepared substrate surfaces. Avoid directly striking reinforcing steel with impact tools used for concrete removal.

c. Provide perpendicular edges at perimeter of repair area. The perimeter of the repair areas must be saw cut to a depth of 0.50 to 0.75 in. 15 to 20 mm. For vertical or overhead surfaces, provide 45-degree slope at repair boundaries to facilitate air and rebound escape. Do not cut or damage embedded reinforcement or other embedded items. If embedded reinforcing steel or other embedded items are too close to the surface to provide the perpendicular edge cut, notify the Contracting Officer for direction before proceeding.

d. Extend concrete removal along the corroded reinforcing steel to a point where there is no further delamination, concrete cracking, or reinforcing steel corrosion, and where the reinforcement is bonded to the surrounding concrete.

e. Remove concrete around the exposed layer of reinforcement to a uniform depth beyond within the repair areas to provide a minimum clearance between exposed reinforcing steel and surrounding concrete of 0.75 in, or at least 0.25 in. larger than the maximum nominal size of the coarse aggregate in the repair material. f.

Preparation of Concrete Substrate Surface

a. Confirm perpendicular edges at repair area perimeter, and reinstate if damaged by concrete removal process. Remove loosely bonded concrete, bruised or fractured concrete, and bond-inhibiting materials such as dirt, concrete slurry, or any other detrimental materials from the concrete substrate using approved methods. Where concrete has been removed by impact methods, abrasive blasting must be used to prepare the surface and remove bruised concrete.

b. Visually inspect and sound substrate surface to confirm that no further delamination or otherwise unsound concrete remains. If encountered, notify the Contracting Officer.

c. Clean the substrate.

Existing Reinforcement Preparation

a. Clean existing reinforcement that will remain. Remove corrosion and/or other laitance and notify the Contracting Officer if section loss is greater than 20%.

b. Replace coating on reinforcement per ASTM A780/A780M][ASTM A775/A775M.

Placement of Concrete

a. Use either portland cement concrete or Epoxy as the repair material, follow material manufacturer's recommendations.

d. Apply corrosion inhibitors to the existing rebar.

c. Bristle broom a thin coat of the repair material into the saturated surface dry substrate filling roughened surface pores before placing the repair material in the repair area. Do not allow thin coat to dry before placing repair material.

d. Slope all concrete for proper drainage.

CRACK REPAIR

Preparation

a. Remove concrete as needed per the repair of existing cracks.

b. Remove foreign material, such as dirt, oil, grease, or other chemicals, from the cracks before injection using compressed air, low-pressure water, or vacuuming. Allow wet surfaces to dry at least 24 hours.

c. Immediately before placing the repair material or installing formwork, make the repair area available for inspection by the Contracting Officer. Obtain acceptance by the Contracting Officer of surface preparation before proceeding with Work.

Do not apply adhesive if the temperature of the concrete is not within the range of application temperatures recommended by the manufacturer of the adhesive.

Crack routing Inspect surfaces adjacent to crack to receive repair material. If deteriorated, route a V-groove section at the crack face until sound concrete is reached.

Sealing

a. For epoxy injection, apply a surface seal over all exterior faces of the crack that can be reached to contain the injection adhesive in the crack.

b. For gravity fill repairs, apply a surface seal along the bottom surface of the element that can be reached to contain the repair material in the crack. Application Epoxy Injection a. Install the injection entry and venting ports using flush mounted or drilled fittings per proprietary manufacturer's instructions.

c. Space the ports at a distance equal to the thickness of the new concrete.

d. Inject the epoxy using material manufacturer's recommended equipment.

e. Apply recommended manufacturer's injection pressure.

f. For vertical or inclined cracks, apply injection by pumping epoxy into entry ports at the lowest elevation, cap, and move upward.

g. For horizontal cracks, apply injection by proceeding from one end of the crack to the other until the crack is fully sealed.

h. After 10 min., repeat the injection procedure until all ports refuse injection.

i. Remove ports and remove the surface seal by chipping, or grinding or other acceptable means after the injected epoxy has cured.

Contractor Considerations:

- Contractor is to compliance with all applicable laws, regulations, rules, and standards, including without limitation, those regulations, rules, and standards, promulgated for the administration and enforcement of the following laws: the Occupational Safety and Health Act (OSHA) or Federally approved State equivalent(s).

- Bridges are over a 18-24” deep body of water that contains endangered Crocodiles.

Extreme caution must be maintained to protect the crocodiles and workers.

- Contractor will provide a logistics plan that illustrates the location of porta pots, laydown area, storage area, staging area, mobile office, etc. as necessary to perform the Work.

- Contractor will conduct all contracted activities in a manner to prevent contamination of Government land and property.

- Contractor responsible for disposal of all project debris to an approved county landfill.

- On-site work hours of 7 am to 4 pm Monday through Friday. If work is to be done outside those hours, contractor will submit a request for approval at least 48 hours in advance. Government holidays - No services or deliveries shall be performed on Government legal holidays.

Special Considerations:

The Government reserves the right to exclude or remove from the site or building any employee of the Contractor whom the Government deems unsafe, incompetent, careless, insubordinate or otherwise objectionable, or whose continued employment on the work is deemed by the Government to be contrary to the public interest.

Contractor affirms that at no time AOML IT equipment shall be used during this contract without the explicit permission of AOML IT staff.

Meeting Schedule:

MEETING / CONFERENCE / CONFERENCE

CALL

LOCATION

Project Kick-off Conference Call Site Visit/Investigation On Site Weekly Progress On Site or Conference Call Close Out Conference Call

Points of contact list

Jim Barone

Facilities Manager, AOML 4301 Rickenbacker Causeway, Miami, FL 33149 James.Barone@noaa.gov 561-696-8049

CDR Tony Perry III Associate Director, AOML 4301 Rickenbacker Causeway, Miami, FL 33149 aoml.associate.director@noaa.gov 305-798-4179