Amendment W912WJ20Q0136-0001.pdf

W13G86019875820001

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15A. NAME AND TITLE OF SIGNER (Type or print)

30-105-04EXCEPTION TO SF 30

APPROVED BY OIRM 11-84

STANDARD FORM 30 (Rev. 10-83) Prescribed by GSA

FAR (48 CFR) 53.243

Amendment is necessary to address concerns posed from industry.

All other terms and conditions remain unchanged.

1. CONTRACT ID CODE PAGE OF PAGES

1 14

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

16C. DATE SIGNED

BY 11-Sep-2020

16B. UNITED STATES OF AMERICA15C. DATE SIGNED15B. CONTRACTOR/OFFEROR

(Signature of Contracting Officer)(Signature of person authorized to sign)

8. NAME AND ADDRESS OF CONTRACTOR (No., Street , County, State and Zip Code) X W912WJ20Q0136

X 9B. DATED (SEE ITEM 11)

28-Aug-2020

10B. DATED (SEE ITEM 13)

9A. AMENDMENT OF SOLICITATION NO.

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

X The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offer is extended, X is not extended.

Offer must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended by one of the following methods:

(a) By completing Items 8 and 15, and returning 1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN

REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE

CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(B).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

E. IMPORTANT: Contractor is not, is required to sign this document and return copies to the issuing office.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

10A. MOD. OF CONTRACT/ORDER NO.

2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO.(If applicable)

6. ISSUED BY

3. EFFECTIVE DATE

11-Sep-2020

CODE

U S ARMY ENGR DISTRICT, NEW ENGLAND

696 VIRGINIA RD

CONCORD MA 01742-2751

W912WJ 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

Sheila.M.Winston@usace.army.milEMAIL:978-318-8159TEL:

SHEILA M WINSTONVINCUILLA / CHIEF, CONTRACTING DIVISION

W912WJ20Q0136

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

SECTION SF 30 - BLOCK 14 CONTINUATION PAGE

The following have been added by full text:

REQUEST FOR INFORMATION

Question 1: The specifications state that the work is to be done no later than 150 days from the Notice to Proceed. Based on the time of year the project will be awarded, will there be relief from the 150 days during the winter months?

Answer 1: Additional days have been added to the Schedule to permit Contractors will have the option of performing work this Fall or next spring.

STATEMENT OF WORK-REVISED

RAILROAD BRIDGE CONCRETE REPAIRS ON PIERS

U.S. ARMY CORPS OF ENGINEERS

CAPE COD CANAL

BOURNE, MA

Scope of Work

I. General

1. Scope – Furnish all labor, materials and equipment to repair the concrete surface on the north and south piers on the Cape Cod Canal Railroad Bridge.

2. Location – The Railroad Bridge is located off of Main Street Buzzards Bay, MA 02532 adjacent to the Buzzards Bay Recreation Area for access to the north pier. Access to the south pier is from Bell Road in Bourne Ma.

3. Site Visit – Contact the Technical Point of Contact to arrange a site visit. The Technical

Point of Contact (TPOC) for this project is John MacPherson (978-318-8176 or John.C.MacPherson@usace.army.mil).

4. Schedule – The work shall be completed no later than 258 days from the Notice to Proceed.

Work shall be performed Monday through Friday 7:00 AM to 4:00 PM unless otherwise approved by the Technical Point of Contact. No work shall be done on weekends or Government holidays.

5. Safety – General: All work shall be conducted safely and in accordance with the U.S. Army Corps of Engineers Safety and Health Requirements Manual (EM 385-1-1, most recent edition), and all applicable OSHA, federal, state, and local safety and health requirements. A copy of EM 385-1-1 can be provided by the project office or accessed electronically at Headquarters USACE website under publications using the following link:

http://www.publications.usace.army.mil/Portals/76/Publications/EngineerManuals/EM_385- 1-1.pdf Project staff reserve the right to cease work at any time should the safety of Federal employees, Contractors, and/or public visitors become jeopardized.

A. Accident Prevention Plan: The Contractor shall prepare an Accident Prevention Plan

(APP) specific to the activities being performed. It shall include Activity Hazard Analyses (AHAs) as described below. Special attention shall focus on the requirements of EM 385-1-1, specifically Section 01.A.12 through 01.A.17 and Appendix A, (Minimum Basic Outline for Accident Prevention Plan). Work shall not proceed until the APP has been reviewed by the Government Designated Authority (GDA) and deemed acceptable for use on the project.

The APP shall interface with the Contractor's overall safety and health program. Any portions of the Contractor's safety and health program referenced in the APP shall be included and made site-specific. The Government considers the Prime Contractor to be the "controlling authority" for safety and health of the subcontractors. Contractors are responsible for informing their subcontractors of the safety provisions required and inspecting work of subcontractors to ensure compliance.

The Contractor shall conduct a safety meeting at the project site on the first day of work, whenever a new activity or phase of work begins, or at least weekly during the progress of work. All safety meetings shall be documented. Records of the safety briefings shall be submitted to the GDA weekly.

B. AHA: An AHA shall be submitted for each major phase of work. A major phase of work is defined as an operation involving a type of work presenting hazards not experienced in previous operations or where a new subcontractor or work crew is to perform the work.

The analysis shall define all activities to be performed, identify the sequence of work, the specific hazards anticipated, and the control measures to be implemented to eliminate or reduce each hazard to an acceptable level. Work shall not proceed on a phase of work until the AHAs have been accepted by the GDA. A preparatory meeting shall be conducted by the prime contractor to discuss the AHAs contents with all effected onsite employees. The AHA shall be continuously reviewed and revised to address changing site conditions as appropriate.

C. Required Personnel: The Contractor shall employ a minimum of one Competent Person

(CP) at each project site to function as the Site Safety and Health Officer (SSHO). The SSHO shall be present at the project site and report to the contractor’s upper management. The SSHO is required to have related construction experience and have completed a 10 Hour OSHA training (or more).

D. Accident Reporting: All accidents and near misses shall be investigated by the

Contractor. All work-related recordable injuries, illnesses and property damage accidents (excluding on-the-road vehicle accidents), in which the property damage exceeds $5,000.00, shall be verbally reported to the GDA within 4 hours of the incident. Serious accidents as described in EM 385-1-1 Section 01.D shall be immediately reported to the GDA. ENG Form 3394 shall be completed and submitted to the GDA within five working days of an incident.

E. COVID-19 Precautions: As part of the APP and AHAs include site specific COVID-19 monitoring procedures which address, at a minimum, the following elements: Procedures for periodic sanitation and disinfecting of equipment, vehicles and tools in accordance with CDC guidelines. Site specific measures to practice social distancing while working on the project. Employee training on the signs, symptoms, and protection measures in accordance with CDC guidelines. A list of PPE to be used in accordance with CDC and state guidelines.

6. Fall Protection

A. General: The requirements of this section are applicable to contractors when their employees are working at heights above 6 feet, exposed to fall hazards, and/or using fall protection equipment. When applicable, Contractors are responsible for establishing, implementing and managing a fall protection program in accordance with EM 385-1-1, Section 21. Reference Section 21.O for specific requirements for working over or near water.

7. Specific Safety Section-Crystalline Silica

A. General: All activities that create a crystalline silica exposure must be completed in accordance with 29 CFR 1926.1153; Occupational Exposure to Respirable Crystalline Silica. The 1926.1153 standard has been deemed more stringent than EM 385-1-1, Section 06.N and shall be used as the primary standard for activities involving crystalline silica.

B. Submittals: A Silica Exposure Control Plan in accordance with 1926.1153 shall be submitted as a component of the APP. AT a minimum the plan must address the following:

i. The tasks in the workplace that involve exposure to silica;

ii. The engineering controls, work practices, and respiratory protection used to limit employee exposure to silica for each task;

iii. The housekeeping measures used to limit employee exposure to silica;

iv. The procedures used to restrict access to work areas, when necessary, to minimize the number of employees exposed to silica and their level of exposure, including exposures generated by other employers or sole proprietors;

v. Employee Training;

vi. Medical Surveillance

Specified Exposure Control Methods: Reference the link below to “Table 1: Specified Exposure Control Methods when Working With Materials Containing Crystalline Silica.”

Compliance can be achieved by fully and properly implementing the engineering controls, work practices, and respiratory protection set forth for the relevant task on this table:

https://www.osha.gov/silica/Table1sect1926.1153.pdf

8. Preconstruction Conference – Prior to the start of any work, the Technical Point of Contact will schedule and conduct a “Preconstruction Conference”. The Contractor’s Project Manager and Quality Control Personnel will attend this meeting. This conference will be held at the time and location agreeable to the government and contractor. No work may be performed under this contract prior to this conference. The purpose of the conference is to enable the Technical Point of Contact to outline the procedures that will be followed by the Government in its administration of the contract, and to discuss the performance that will be expected from the Contractor. This conference will allow the Contractor an opportunity to ask questions about the Government’s administration and inspection of contract work or obtain other pertinent information that might be required. At the Preconstruction Conference the contractor shall provide to the name of the project superintendent with a telephone number for project coordination.

The following is a general list of items for discussion during this Preconstruction Conference:

i. Authority of the Technical Point of Contact and Quality Assurance Inspectors.

ii. Contractor’s Safety Program (including sub-contractors).

iii. Accident Prevention Plan and Activity Hazard Analysis

iv. Safety Meetings

v. Accident Reporting

vi. Safety Data Sheet (SDS) requirements

vii. Correspondence, Communication and Administrative Procedures.

viii. Invoice and payment.

ix. Security Verification

9. Permits – The Contractor shall, without additional expense to the Government, be responsible for obtaining any necessary licenses, permits, and letters of certification. The Contractor shall comply with any applicable Federal, State, County, and Municipal laws, codes, and regulations in connection with the performance of the work specified under this contract.

10. Security – The Contractor will comply with all established security policies at the Cape Cod Canal. Due to periods of heightened security that may affect the access to the areas covered under this contract, the Government reserves the right to close any property or portion of property and reschedule and/or cancel any subsequent work. The Contractor shall be given at least 24 hour notice of any such closure. The contractor will verify all employees working at the Cape Cod Canal project through the E-Verify website located at:

http://www.uscis.gov/e-verify. The Contractor will submit verification documents to the Technical Point of Contact prior to or during the Preconstruction Conference or prior to any new employees joining the current project.

11. Contractor Conduct – Alcohol and firearms are prohibited on project grounds.

12. Payment – Payment shall be made on a per job basis. After final inspection and acceptance by the Government, the Contractor must submit an invoice to the Technical Point of Contact.

The invoice shall include the invoice date, contract number, dates of service, description of work, quantities, process, and total amount due per line item. For jobs greater than 30 days the contractor may request progress payment.

All invoices may be mailed to:

US Army Corps of Engineers Cape Cod Canal Field Office PO Box 1555 Buzzards Bay, MA 02532 Attn: John MacPherson

Or Emailed to John.C.MacPherson@usace.army.mil

II. Technical Requirements:

Part 1 General:

1. Summary – Furnish all labor, materials and equipment to repair the concrete surface on the north and south piers on the Cape Cod Canal Railroad Bridge. Repair work includes demolition and installation of Polymer-Modified Portland Cement Mortar to repair deteriorated concrete on the piers. The areas to be repaired are shown on the reference plans (North Pier Deteriorated Concrete Repair Survey and South Pier Deteriorated Concrete Repair Survey). There is approximately 65 square feet of total concrete repair areas on the north pier. There is approximately 250 square feet of total concrete repair areas on the south pier.

The contractor is responsible for properly disposing of all materials removed as part of the work. All products shall be installed in accordance to manufacturer’s or supplier’s recommendations.

2. Existing Conditions – The existing concrete cap on the piers of Railroad Bridge has areas of deteriorated concrete and cracks that require repair. The piers are surrounded by water with limited access for equipment and personnel. Steel beams of the bridge are located in close proximity to the piers and severely limit vertical space and access to repair areas. Areas available for Contractor storage and staging of equipment and dumpsters will be coordinated with the TPOC at the Pre Construction Meeting.

The piers have mechanical and electrical equipment mounted to the surface that must be protected and worked around. The movable span of bridge is required to remain operational during the repair work which will require the contractor to ensure equipment and personnel are clear. See the informational plans and informational photos for details of the existing conditions.

3. Clean Up and Waste Disposal – The contractor shall keep the work area free from accumulation of waste materials. The contractor is responsible for proper disposal or recycling of all materials generated. Any and all disturbed areas resulting from contractor activities shall be restored by the contractor to the satisfaction of the Technical Point of Contact.

4. Environmental Protection – Contractor shall carefully plan work activities to prevent any release of contaminants to land or water at the Canal Project. Contractor shall utilize proper means and methods for containment and collection of all cleaning materials and all waste generated. Appropriately sized spill kits are required for materials stored onsite. The Contractor is required to immediately notify the TPOC if any spill or release of contaminants to the environment occurs. Containers for excess and waste materials, rubbish, etc. shall be provided by the contractor at locations coordinated with the TPOC. Containers shall be inspected/ cleaned on a daily basis. Water, air and land resources shall not be adversely impacted during the course of the work. Contractor will take necessary steps to ensure all federal, state, and local environmental regulatory requirements are met.

5. Sustainability - EPA Designated: Under the Comprehensive Procurement Guidelines (CPG) program, the Environmental Protection Agency (EPA) designates products that are or can be made with recovered materials, and recommends practices for buying these products. Any designated product that is being offered or supplied under this contract shall meet the minimum recommended content levels as identified under the CPG program. Visit https://www.epa.gov/smm/comprehensive-procurement-guideline-cpg-program for a complete list of designated products and the associated recommended contents levels.

Offerors must be able to demonstrate that each offered products meets minimum content levels upon request.

Bio-based: The United States Department of Agriculture (USDA) designates certain bio-based products for federal procurement and specifies minimum bio based content levels for those products. Any designated product that is being offered or supplied under this contract shall meet USDA BioPreferred's minimum bio based content level. Visit the BioPreferred web site https://www.biopreferred.gov/BioPreferred/faces/pages/ProductCategories.xhtml for the complete list of designated products and the associated minimum bio based content level requirements.

6. Personal Protective Equipment - It is the contractor’s responsibility to furnish and supply personnel with the proper personal protective equipment and fall protection necessary for performing the work.

7. Government Resources – The government will supply 120 volt electricity from points of existing outlets. The contractor shall carefully conserve the use of electricity provided. The government will supply potable water from points of existing spigots. The contractor shall carefully conserve the use of water provided. The contractor shall supply his own means of communication (telephone). Bathroom facilities are not available at the Railroad Bridge.

The contractor should have portable sanitation facilities delivered and used near the work sites.

8. Damage to Government and Private Property – The contractor shall be responsible for restoring all Government facilities or structures damaged as a result of the firm’s operation.

The contractor shall also be responsible for any damage to private property or injury to any person as a result of the firm’s operation. The contractor shall notify the Technical Point of Contact immediately of damage to Government and private property and injury to any person resulting from the firm’s operation.

9. Omissions – This contract may not cover all specified activities, steps, and procedures required to supply the contract product. In case of omission, the normal industry, state, or federal standards, practices, specifications, and/or guides shall prevail. In no instance shall an omission be reason to produce less than an acceptable product.

10. Quality Assurance – The contractor is responsible for the quality control of the contract work. The Government has the right to inspect and test all items called for by the contract, to the extent practicable at all times and at all places during the term of the contract.

11. Other Contracts - The Government may undertake or award other contracts for additional work not related to this contract, and the Contractor shall fully cooperate with other Contractors and Government employees. The contractor shall not commit or permit any act, which will interfere with the performance of work by another contractor or by Government employees.

12. Receiving and Storing Materials – The Corps of Engineers will provide available storage areas and parking for contractor personnel on both sides of the Canal. Specific staging areas will be coordinated at the Pre-Construction Meeting. The contractor is responsible for protecting any stored material until it is placed in service. The contractor is responsible for receiving and unloading of delivered goods. Government employees will not receive material for supplies for the contractor and will not be responsible for damage to the contractor’s equipment or materials.

13. Requests for information – Requests concerning the work of this project should be directed to the Technical Point of Contact, John MacPherson at 978-318-8176 or John.C.MacPherson@usace.army.mil

14. Submittals – Although the Government technically reviews submissions required by this scope of work, it is emphasized that the Contractor’s work must be prosecuted using proper internal controls and review procedures. The documents identified below must be prepared in accordance with the applicable standards, submitted for review and accepted by the Government prior to the commencement of any field activities.

Accident Prevention Plan, including fall protection plan – Prior to the start of field work Activity Hazard Analysis – Prior to the start of field work Security Verification – Prior to the start of field work

Products Proposed for Repairs, including manufacturer, name, type, color, etc.

- Prior to the start of field work

Part 2 Products:

All products shall be new, unused and to the satisfaction of the Technical Point of Contact.

Products shall be approved by the Technical Point of Contact prior to installation. The source of materials which will affect the appearance of the finished work shall not be changed after the work has started except with the Technical Point of Contact’s written approval.

1. Polymer-Modified Repair Materials meet the following requirements:

Note: The Contractor shall use a manufactured pre-mix product that has been approved by the Technical Point of Contact through the submittal process.

A. Polymer-Modified Cementous Repair Mortar:

i. Polymers used must be compatible with other polymers and materials used on the project. The Contractor is responsible for verifying material compatibilities.

ii. Polymer-Modified, Portland cement, fast-setting, trowel-grade mortar is a two-component material with a migrating corrosion inhibitor used to repair horizontal surfaces.

iii. Properties of cured material:

1. Compressive strength: ASTM C109/C109M: 6000 psi minimum at 28 days.

2. Bond Strength: ASTM C882/C882M Modified: 2000 psi minimum at

28 days moist cure.

B. Aggregates:

i. Unless otherwise specified or recommended by the polymer material manufacturer, aggregate used with polymers must meet ASTM C33/C33M requirements.

ii. Aggregate properties and proportions used with polymers must meet the requirements of the polymer material manufacturer, the requirements of the referenced polymer standard, and the Contract Documents.

iii. Aggregate used with polymers must be dry and free of dirt, asphalt, and other organic materials. Aggregate moisture content must be less than 0.2 percent by weight.

iv. For patch repairs, the maximum-sized aggregate must not be greater than one third the depth of the patch area.

v. Aggregates shall only be added when allowed by the manufacturer’s written instructions.

C. Water:

i. Water for cleaning, mixing and curing must be in compliance with the requirements of ASTM C1602/C1602M; fresh, clean, potable, and free of injurious amounts of oil, acid, salt, or alkali.

2. Corrosion Inhibitor/Bonding Agent Materials meet the following requirements:

A. The corrosion inhibitor/bonding agent shall be an epoxy resin/Portland cement adhesive which is fast setting and is capable of coating reinforcing steel and non-structural steel to prevent corrosion and for bonding plastic concrete repair mix to hardened concrete.

B. The material shall in no way decrease the bond strength between the reinforcing steel and the repair concrete, or between the repair surface and the repair concrete.

C. The corrosion inhibitor/bonding agent shall have the following properties:

i. Flexural Strength: Must meet ASTM C348 28 day; 1,000 psi minimum.

ii. Splitting Tensile Strength: Must meet ASTM C496/C496M 28 day; 1,000 psi minimum.

iii. Bond Strength: Bond strength at 14 days, ASTM C882/C882M

2 hours open time: 3,000 psi minimum 24 hours open time: 2,000 psi minimum

iv. Material Characteristics:

Pot life: 90 minutes at 72 degrees F.

Contact Time: 24 hours Material shall not produce a vapor barrier.

D. Acceptable Products; Corrosion Inhibitor/Bonding Agent:

i. “Emaco P24” as manufactured by Masterbuilders (Chemrex)

ii. “Sika Armatec 110 EpoCem” as manufactured by Sika Corporation

iii. “Duralprep A.C.” as manufactured by Euclid Chemical

iv. Or an Approved Equal

3. Reinforcing Steel Materials meet the following requirements:

A. Reinforcing Bars:

i. Provide reinforcing bars conforming to the requirements of ASTM A615/A615M, grade 60 deformed.

B. Welded Steel Wire:

i. Provide welded steel wire reinforcement conforming to the requirements of ASTM

A1064/A1064M.

C. Detail Reinforcement:

i. Detail reinforcement not indicated in accordance with ACI 301 and ACI SP-66.

D. Steel Pin Materials meet the following requirements:

i. Steel Pins shall meet ASTM A615/A615M, ASTM A996/A996M, ASTM A36/A36M.

ii. The steel pins shall be appropriately sized in accordance with repair material manufacturer’s instructions. Submittals shall be provided to the Technical Point of Contact for approval.

4. Epoxy Grout Materials to secure steel pins meet the following requirements:

A. The Epoxy Grout Material shall be compatible with this type of application and with all other repair materials.

B. The Epoxy Grout Material shall meet the following requirements:

i. Tensile Strength: Must meet ASTM C307; 2,200 psi minimum (7 days).

ii. Bond Strength to Concrete (wet cure): 3,100 psi minimum (7 days).

iii. Bond Strength to Steel (wet cure): 3,600 psi minimum (7 days).

iv. Flexural Strength: Must meet ASTM C580; 3,700 psi minimum (7 days).

Part 3 Execution:

General

1. The Contractor shall coordinate all activities to limit and minimize the impact of the contract activities on the operations of the Railroad Bridge operations. The movable span of the Railroad Bridge will remain operational during work on the piers. Close coordination is required with USACE Bridge Operators to ensure safety of personnel working on the piers and clear areas for train movements. The movable span is lowered and raised approximately 4 times per day. The Contractor shall schedule any activities that impact Railroad Bridge operations prior to the start the activity. The Technical Point of Contact must approve all activities that impact the Railroad Bridge operations prior to the start of the activity.

2. Any proposed use of floating plant to access the piers and/or abutments shall be coordinated and approved by the US Army Corps of Engineers Cape Cod Canal Marine Traffic Control Center. Barge work shall not interfere with navigation within the federal channel limits of the Cape Cod Canal. Marine Traffic Control can be contacted at (978) 318-8500.

3. The contractor is responsible to provide all equipment, platforms, boats, barges, anchor points, supports, etc. required to access the piers and abutments.

4. Access to the piers and/or abutments. Contractors should note the limited horizontal and vertical clearance at work areas on the piers due to steel beams and equipment of the bridge.

A. By Land. The piers can be accessed using a service road on either side of the canal and a steel grated walkway. Existing stairs can be used for access from the grated walkway to the top of piers. Contractor use of the service roads and walkways shall not interfere with other bridge operations and recreation activities that occur on adjacent areas.

B. By Sea. The piers are surrounded by water. A boat or small work barge can be secured to the piers. Contractor is responsible for all anchor points, cables, ropes, etc. Boats and barges can be left adjacent to the piers whenever work is ongoing except when the moveable span is to be lowered. Floating plant shall not obstruct the adjacent navigation channel of the Cape Cod Canal. All contractor floating plant shall comply with direction from the Canal’s Marine Traffic Control Office.

Public marinas with boat ramps are available near the Cape Cod Canal Field Office.

Demolition Spalls and Deteriorated Concrete:

1. The Contractor shall confirm the concrete repair areas on both the north and south pier prior to the start of any repair work (See Reference Plans – North Pier Deteriorated Concrete Repair Survey & South Pier Deteriorated Concrete Repair Survey). Any discrepancies shall be coordinate with the Technical Point of Contact.

2. Means and methods of demolition shall protect the mechanical and electrical equipment of the Bridge that is on the piers. Dust and debris shall be contained to prevent impact to all mechanical and electrical equipment. Lights and associated conduits mounted to the concrete cap that conflict with repair areas can be temporarily removed and re-secured with in-kind hardware after coordination with the TPOC to ensure electrical safety. Any navigation aid lights on the piers shall be functional each night during the work.

3. Remove all deteriorated concrete in the identified area to a minimum depth of 2 inches.

4. Make a perpendicular saw cut at least 1 inch deep, but no deeper than the reinforcing steel, and a minimum of 1 inch outside of the area to be repaired to delineate the perimeter of the repair area and avoid feather edges.

5. The perimeter saw cut shall have no angles less than 90 degrees, and care shall be taken to not cut through existing steel reinforcement or embedded metal that is not to be removed.

6. Remove additional deteriorated concrete in these areas where necessary to expose a surface of sound, un-weathered concrete that is uncontaminated by oils, greases, or deicing salts or solutions. Additional sounding of the concrete shall occur to ensure viable solid concrete. Concrete removal areas are in close proximity to equipment and structural bearings on the piers. Removal of concrete shall be performed carefully with appropriately sized tools and equipment to prevent disturbing anchor bolts of equipment.

7. The internal edges of the existing concrete shall be “dovetailed” when possible to create a greater cavity base. See Reference Plan “Typical Repair Patch between 2” & 6” depth”.

8. Concrete removal to depths greater than 6 inches is not expected to be required.

Contractor shall coordinated with the TPOC prior to any demolition greater than 6 inch depth.

9. Use 15 pound chipping hammers to remove concrete around reinforcing steel. Remove all surface rust and corrosion from existing steel reinforcement with special care taken to avoid damage.

10. Any reinforcing steel that is exposed greater than 50% of its circumference shall be undercut by a minimum of 1 inch behind the steel.

11. If there is reinforcing steel found with less than 75% of the original rebar section remaining at any point along the exposed rebar, a new bar shall be installed as described in the installation section of this contract.

12. Concrete shall be removed with care to avoid damage to adjacent structures and concrete that is not to be repaired under this contract and embedded metal that is not to be removed. Any such damage shall be repaired by the Contractor at no additional cost to the Government.

13. After removal of concrete to the specified limits, clean the surface to which the repair material is to be applied.

14. Perform all cleaning operations to the satisfaction of the Technical Point of Contact.

Protect adjacent structures and embedded items. Perform a preliminary washing as soon as the chipping and trimming are completed to remove loose materials and dust particles.

Clean surface to which new concrete is to be bonded. Final cleaning shall remove all laitance, carbonation, scum, dirt, oil, grease, and loose concrete.

15. Wire brush metal surfaces against which concrete is to be placed to remove rust and other contaminants.

16. Perform final cleaning immediately prior to concrete placement.

17. Protect all work from contamination during all phases of cleanup and preparation prior to repair.

Installation Spalls and Deteriorated Concrete Repair Patch:

1. If after concrete removal there is reinforcing steel found with less than 75% of the original rebar section remaining at any point along the exposed rebar, a new bar shall be installed. The new bar shall have section greater than the maximum section area loss of the existing steel (#3 minimum).

2. The Contractor shall provide a lap splice as indicated in the Reference Plan “Bar Splice Chart”.

3. Appropriately sized steel pins shall be installed and properly spaced to ensure an effective mechanical bond with the substrate and the new repair materials. The spacing of the steel pins shall not exceed 12 inches on center. The sound concrete shall be drilled and the steel pins shall be set into the hole using an epoxy grout that is compatible with the other repair materials.

4. When a repair area exceeds 1.0 square feet, the Contractor shall fasten W1.4/1.4, 2 inch x 2 inch Welded Wire Fabric (WWF) to the steel pins.

5. Perform cleaning on all surfaces to where the repair material will be applied.

6. Install any forms as needed in accordance with American Concrete Institute International

(ACI); ACI 301 Section 2 and 5 and ACI 347.

7. Ensure repair area is saturated surface dry.

8. Apply corrosion inhibitor/bonding agent to all exposed reinforcing steel, miscellaneous embedded steel, exposed pins, WWF and concrete substrate according to the manufacturer’s recommendations.

9. Place Polymer-Modified Concrete according to the manufacturer’s recommendations.

Use appropriate means and methods to ensure that the Polymer-Modified Concrete fills all voids in the repair area.

10. Re-establish any drip edge when applicable.

11. Follow the curing procedure as recommended by the manufacturer of the repair material.

12. The Contractor shall be responsible for establishing their own mixing and washout area with containment for any concrete that is unused or in excess of what is needed to complete the work.

13. Concrete materials shall not be washed out or disposed of on the rip rap or on any other area on the Government’s property.

Final Inspection and Clean Up

1. The Contractor shall perform a Final Inspection and Clean Up of the worksite at the completion of the required work. All Final Inspections and Clean Up shall be coordinated with the Technical Point of Contact.

2. Final Inspection:

a. Upon completion of the work, the Contractor shall inspect surfaces for damage, staining, and other distresses.

b. The repairs shall be inspected for cracking, crazing, delamination, unsoundness, staining and other defects.

c. The Contractor shall inspect the finish and surface tolerances of the repairs to verify that all requirements have been met.

d. The Contractor shall repair all surfaces exhibiting defects as directed at no cost to the Government when defects are due to Contractor workmanship or procedures.

3. Clean Up:

a. The Contractor shall clean all surfaces of concrete and adjacent facilities which are stained by dirt, oil, grease, fuel or other byproducts that are created by the construction operations.

b. The Contractor shall dispose of all debris, trash, unused cured concrete, and any other materials related to the construction in accordance with all Federal, State and Local requirements.

(End of Summary of Changes)