A04_SOW.pdf

DEEP FORK NATIONAL WILDLIFE REFUGE MONTEZUMA CREEK BOX CULVERT

OKMULGEE COUNTY, OKLAHOMA 2024

SPECIFICATIONS

TABLE OF CONTENTS

SECTION

01009 GENERAL INFORMATION AND REQUIREMENTS

01505 MOBILIZATION

02110 CLEARING AND GRUBBING

02211 EARTHWORK

03300 REINFORCED CONCRETE AND BOX CULVERTS

GENERAL INFORMATION AND REQUIREMENTS 01009-1

SECTION 01009 - GENERAL INFORMATION AND REQUIREMENTS

PART 1: GENERAL

1.1 SUMMARY:

A. Description of Work: The work shall consist of all labor, equipment, supplies and materials, to provide and install concrete box culvert, concrete end sections, concrete approach drives, riprap, site grading, creek diversion, and all other items as shown on the drawings and specifications. Demolition will be the responsiblity of the Contractor and demolished rock from embankment walls may be used as riprap at their option.

Contractor shall be responsible for diverting the creek, as necessary to perform construction. Construction shall be done between July and mid-October to avoid the rainy Spring and Refuge hunting activities in October.

B. Location: Work is located near Okmulgee, Oklahoma, east of Oklahoma City, at the Deep Fork National Wildlife Refuge, Okmulgee County, Oklahoma

C. Site Visit: Contractors are encouraged to visit the project site and inspect existing conditions prior to submitting quotes. See Federal Acquisition Regulation (FAR) clause 52.236-27 Site Visit. Contact Todd Gallion, Refuge Manager, at, 918-475-3670 todd_gallion@fws.gov, to arrange a site visit. COR is Jeffrey Johns, 505-503-3301, email jeffrey_johns@fws.gov

1.2 REFERENCES:

Referenced Standards are listed in the applicable specification section.

1.3 DEFINITIONS:

Approvals: Approval of submittals is an indication that the Contractor’s submittals have been reviewed and that there are no objections, except as noted. Approval of deviations shall apply only to those deviations or omissions from the requirements of the drawings and specifications brought to the Contracting Officer’s (CO) attention in writing.

GENERAL INFORMATION AND REQUIREMENTS 01009-2

1.4 SUBMITTALS:

A. Scope: Submittals include shop drawings, manufacturers’ literature, as-built drawings, samples, work schedules and a schedule of values.

B. Requirements: Refer to specification sections for submittals required. Allow at least 7 working days for review, plus transmittal time back and forth. Submittals shall be emailed to the Contracting Officer’s Technical Representative (COTR) Jeffrey Johns, jeffrey_johns@fws.gov , at U.S. Fish and Wildlife Service, Region 2, Division of Engineering, with a copy emailed to the CO. The standard FWS Submittal Form shall be used for all submittals. Submittals shall come directly from the Contractor with their stamp and signature of approval; submittals will not be accepted from sub-contractors or suppliers. Do not commence work which requires review of any submittals until receipt of returned submittals with an acceptable action. Do not allow submittals without an acceptable action marking to be used for the project.

C. Identification of Submittals: Completely identify each submittal by showing at least the following information:

1. Name and address of submitter (Contractor), plus name and telephone number of the individual to contact for further information.

2. Name of project as it appears in these specifications.

3. Contract number, submittal number, and specification section number to which the submittal applies.

4. Whether this is an original submittal or resubmittal.

5. Each item shall clearly note the manufacturer’s name and address, trade name, product, lot, style, color, catalog designation or model number, and locations of use.

D. Submittal of physical samples or color charts shall be delivered to the Refuge Manager, with emailed photocopies and submittal transmittal cover sheet to the COTR. The Refuge Manager will provide their selections to the COTR who will then respond to the contractor.

E. There will be no approval of submittals prior to bid opening and award. Submittals will be evaluated based on the requirements of the specifications and drawings, during the submittal process after contract award.

1.5 CONFORMANCE:

Submittals must show clearly that the product, sample or shop drawing conforms to the specifications.

1.6 QUALITY ASSURANCE:

mailto:jeffrey_johns@fws.gov

GENERAL INFORMATION AND REQUIREMENTS 01009-3

A. Codes and Standards: The work shall comply with codes and standards applicable to each type of work and as listed in the individual sections of these specifications. This contract incorporates materials, applications, and tests by reference, with the same force and effect as if they were given in full text.

B. Conflict: Where a conflict occurs between reference documents, drawings, and project specifications, the most stringent requirement shall govern.

C. Product basis: Where specifications or drawings call out a specific product or manufacturer, it is understood that an equal or better product is acceptable, as approved in the submittal process.

1.7 DELIVERY, STORAGE, AND HANDLING:

A. Delivery: Protect products incorporated into the work from damage while in transit to the site. Products must be delivered in original unopened containers with manufacturer’s name, brand designation, and contents legibly indicated. The containers shall bear the referenced specification number, type, and class as applicable.

B. Storage: Provide temporary storage facilities for products. Storage shall comply with the manufacturer’s instructions. The storage area shall permit access for inspection and handling.

C. Handling: Load and unload products protecting them from damage.

1.8 PROJECT/SITE CONDITIONS:

A. The project site is a Fish and Wildlife National Wildlife Refuge. Work areas shall be roped off to alert unauthorized personnel to work in progress.

B. Existing property not indicated for demolition, shall be protected. All damage by

Contractor’s activities shall be repaired by the Contractor at no additional cost to the Government.

C. Safety is paramount. Contractor is responsible for safety on the project site and shall take measures to maintain a safe area around the project site which is used by Government employees and the public. Applicable OSHA regulations shall be adhered to by the Contractor. Contractor shall submit a safety plan demonstrating how they will be in compliance with 29 CFR 1926.20, prior to starting work.

D. Landscape Protection: Protect all vegetation inside and outside work limits. All rutting mailto:jeffrey_johns@fws.gov

GENERAL INFORMATION AND REQUIREMENTS 01009-4

caused by Contractor activities shall be filled and contoured to match adjacent areas.

Areas damaged by Contractor activities shall be repaired.

1.9 SEQUENCING AND SCHEDULING:

A bar chart type work schedule shall be submitted to the COTR within 5 days after the preconstruction conference. When requested, submit an updated schedule within 3 calendar days.

PART 2: PRODUCTS

2.1 TEMPORARY FACILITIES:

A. The Contractor shall provide portable toilet facilities at the construction site.

B. Potable Water is not available at the site. Water from Montezuma Creek, as available, may be used by Contractor for construction activities at no additional charge.

C. Overhead Electric power is not available at the site.

PART 3: EXECUTION

3.1 PROJECT MEETINGS:

A. Preconstruction Conference:

1. A preconstruction conference will be held prior to the start of work. The Contractor will be notified in advance of meeting time, date, and place. The purpose of the meeting will be to review required work, project drawings and specifications, construction schedules, payroll, payments, and administrative provisions of the contract.

2. The Contractor, subcontractors, and the persons responsible for coordination of the work shall be present at the meeting.

3. The Contractor shall submit a schedule of values within 5 days after the preconstruction conference, which may be used as a basis of payment as the work progresses.

B. Progress Meetings:

GENERAL INFORMATION AND REQUIREMENTS 01009-5

To be held at the project site as required.

C. Inspections:

1. Routine inspections will be performed by the government Contract Inspector (CI).

Inspection of items of work by the CI will not relieve the Contractor of the requirement to meet project specifications. The CI shall be informed 24 hours in advance of work requiring his observation. After being informed in advance the CI’s non-attendance shall not prohibit the Contractor from proceeding with work in the CI’s absence.

2. For final inspection, notify the COTR in writing at least 8 working days before the completion date so the Government can schedule final inspection. The superintendent shall be present during the final inspection.

3.2 DISPOSAL OF DEBRIS:

Demolition debris shall be removed from the project site and disposed of in a legal disposal site by the Contractor. Contractor shall pay all fees required for disposal.

3.3 AS-BUILT DRAWINGS:

A complete set of full-sized prints shall be kept by the Contractor. As the job progresses, continuously maintain as-built drawings of the work. The changes shall be noted legibly in red pencil or red ink. These drawings shall be submitted to the COTR in hard copy or electronic format prior to final inspection. Should final inspection reveal changes in the Project not so noted on the As-Built Drawings, the Contractor shall record these changes on the As-Built Drawings within 3 working days of Final Inspection and deliver completed As-Built Drawings to the COTR.

3.4 WARRANTY:

A. All project construction shall be provided with a one-year warranty in accordance with

FAR 52.246-21.

B. With respect to warranties, expressed or implied, from manufacturers or suppliers for materials or equipment furnished under the contract, the Contractor shall:

1. Obtain the most favorable warranties that would be given by the Contractor in normal commercial practices, but in no case less than called for by the specifications.

2. Require warranties to be executed, in writing, for the benefit of the Government.

GENERAL INFORMATION AND REQUIREMENTS 01009-6

3. Submit warranties to the COR prior to the final inspection.

PART 4: MEASUREMENT AND PAYMENT

4.1 METHOD OF MEASUREMENT:

The work described in this section will not be measured for payment.

4.2 BASIS OF PAYMENT:

Payment will be made at the contract price, as indicated in the approved Schedule of Values and will include full compensation for the work described in the contract.

4.3 AWARD:

Award will be made according to the general provisions of the contract.

END OF SECTION

MOBILIZATION

01505-1

SECTION 01505 - MOBILIZATION

PART 1 - GENERAL

1.1 SUMMARY: Section includes preparatory work and operations, including those necessary to the movement of personnel, equipment, supplies and incidentals to the project site; and for other work and operations which must be performed, or costs incurred prior to beginning work on the various items on the project site.

1.2 MEASUREMENT AND PAYMENT:

Units: Progress payments will be made as follows:

1. When 5% of the original contract amount is earned from other bid items, 50% of the amount bid for mobilization or 5% of the original contract amount, whichever is lesser, will be paid.

2. When 10% of the original contract amount is earned from other bid items, 100% of the amount bid for mobilization or 10% of the original contract amount, whichever is lesser, will be paid.

3. Upon completion of work for the project, payment of the amount bid for mobilization in excess of 10% of the original contract amount, will be paid.

4. The total sum of all payments shall not exceed the original contract amount bid for mobilization, regardless of the fact that the Contractor may have shut down the work on the project or moved equipment away from the project and then back again.

PART 2 - PRODUCTS (Not Used.)

PART 3 - EXECUTION (Not Used.)

CLEARING AND GRUBBING

02110-1

SECTION 02110 - CLEARING AND GRUBBING

1.1 WORK DESCRIPTION

A. The work specified in this section includes furnishing all the labor, equipment and materials required to complete all clearing and grubbing, removal of surface debris, shrubs, grass, and other plant life required for the construction.

1.2 REFERENCES

A. Section 201 Oklahoma Department of Transportation Standard Specifications, latest edition.

1.4 REGULATORY REQUIREMENTS

A. Conform to applicable codes for environmental requirements and disposal of debris.

B. Coordinate clearing work with utility companies, if applicable.

PART 2 - PRODUCTS

2.1 MATERIALS

A. None anticipated.

PART 3 - EXECUTION

3.1 GENERAL

A. All work shall meet the requirements of Section 201 of the Standard Specifications for Highway Construction, Oklahoma Department of Transportation.

3.2 PREPARATION

A. Verify that existing plant life designated to remain is tagged or identified. All mature trees with trunk diameter greater than 6 inches are to remain, unless approved

CLEARING AND GRUBBING

02110-2 for removal by the Contracting Officer.

3.3 PROTECTION

A. Locate, identify, and protect from damage utilities that remain.

B. Protect trees, plant growth, and features designated to remain, as final landscaping.

C. Protect bench marks, survey control points, and existing structures from damage or displacement.

3.4 CLEARING

A. Clear areas required for construction.

B. Remove shrubs and brush as required. Remove stumps, main root ball, and root system as required. Mature trees with trunk diameter greater than 6 inches are to remain in place unless within required excavations; clear around these trees within limits of work.

C. Clear undergrowth and deadwood.

3.5 REMOVAL

A. Remove debris, rock, junk, and extracted plant life within limits of construction. The Contractor shall reuse soil and rock if that material meets specifications. All other material shall be removed from the Refuge.

EARTHWORK

02211-1

SECTION 02211 - EARTHWORK

1.1 WORK DESCRIPTION

A. The work specified in this section includes furnishing all the labor, equipment and materials required to complete all grading, dewatering, subgrade preparation, excavation, aggregate, riprap and riprap bedding, compaction, and earthwork for concrete structures as specified herein or as shown on the drawings.

1.2 REFERENCES

A. AASHTO-T99 - Test Methods for Moisture Density Relations of Soils and Soil Aggregate Mixtures, using 5.5 lb (2.49 Kg) Rammer and 12 inch Drop (Standard Proctor).

B. AASHTO-T89 - Determining the Liquid Limit of Soils.

C. AASHTO-T90 - Determining Plastic Limit and Plasticity Index of Soils.

D. AASHTO-M145 - Soil Classification.

E. AASHTO-T238 - Test Methods for Density of Soil and Soil-Aggregate in Place by

Nuclear Methods (Shallow Depth).

F. AASHTO-T239 - Test Methods for Moisture Content of Soil and Soil-Aggregate in Place by Nuclear Methods (Shallow Depth).

G. Oklahoma Department of Transportation Standard Specifications, (ODOT), 2019.

H. AASHTO-T85 - Specific Gravity and Absorption of Coarse Aggregate.

I. AASHTO-T210 - Aggregate Durability Index.

J. Standard Specifications for Construction of Roads and Bridges on Federal Highway

Projects FP-14.

1.3 SUBMITTALS FOR REVIEW

02211-2

A. For each bedding and backfill material, submit gradation analysis, laboratory test results for moisture density relations, and field test results for density and moisture content. Field test results shall be submitted within 24 hours of testing.

B. For rip rap materials, submit specific gravity, absorption, durability index, and gradation test results.

C. Submit the name and qualifications of an Independent Testing Agency which meets the requirements of ASTM E 329 “Standard Specification for Agencies Engaged in the Testing and/or Inspection of Materials Used in Construction,” to perform earthwork testing required by these specifications

2.1 MATERIALS

A. Definitions:

1. Regular Backfill is permitted to be native excavated materials, provided the material is free of rocks greater than 6 inches within 4 feet of the culvert crown.

2. Granular backfill material shall meet the requirements of ODOT Specification

703.07.

3. Rip rap material shall meet the requirements of FP-14, Section 705.02 with gradations in Table 705-1, restated as follows:

% of Rock by Mass Mass, lbs. Approx. Cubic Dimensions, inches Class 3

20 220-330 14 - 16 30 110-220 10 - 14 40 11 -110 5 - 10 10 0 - 11 0 - 5

4. Rip rap Bedding Type II shall meet the requirements set forth in the ODOT

02211-3

Specification Section 703.05 for Granular Backfill, except the gradation shall be as follows:

Sieve Size Percent Passing

3" 90-100 3/4" 20-90 No. 4 0-20 No. 200 0-3

3.1 EXAMINATION

A. Verify site conditions.

3.2 PREPARATION

A. Identify required lines, levels, contours, and datum.

B. State and flag locations of known utilities.

C. Locate, identify, and protect from damage utilities that remain.

D. Protect plant life, lawns, and other features remaining as a portion of final landscaping.

E. Protect bench marks, survey control points, existing structures, fences, sidewalks, paving, and curbs from excavating equipment and vehicular traffic.

3.3 SUBSOIL EXCAVATION

A. Excavate subsoil from areas to be further excavated, re-graded, or areas requiring repair.

3.4 PLACING BACKFILL

A. Scarify subgrade surface to a depth of 6 inches, maintain optimum moisture content +/- 2 percent, compact to a minimum of 95 percent of the maximum density as determined

02211-4 by AASHTO-T99.

B. Install Work in accordance with Oklahoma Department of Transportation Standard Specifications.

C. Place granular backfill for slabs, in continuous layers and compact to 95% maximum density as determined by AASHTO-T99, and in accordance with the typical cross-sections.

D. Maintain optimum moisture content +/- 2 percent for fill materials to attain required compaction density.

E. Make grade changes gradual. Blend slope into level areas.

F. Subgrade beneath concrete box culverts shall be leveled and compacted by the same methods and effort used to compact aggregate and granular materials. Subgrade shall then be proof rolled by a loaded dump truck or equivalent. Any subgrade which remains soft or exhibits pumping shall be brought to the attention of the Contracting Officer with an estimate of the amount of material needing replaced. On Contracting Officer approval, the unacceptable material shall be replaced with granular fill compacted to 95% of AASHTO-T99 maximum density, and paid at a price negotiated by contract modification.

3.5 PLACING RIP RAP AND RIP RAP BEDDING

A. Place rip rap according to FP-14 Section 251 using the method of placed rip rap under Section 251.04.

B. Place rip rap bedding in one uniform layer. Do not compact.

3.6 DEWATERING

A. Depending on time of year, rainfall, and depth of excavation, dewatering of excavations may be necessary to perform required work.

B. Contractor shall be responsible to perform dewatering operations necessary to perform the work according to the specifications and drawings.

02211-5

C. Dewatering shall be considered incidental to the work being performed, and no additional payment will be made.

3.7 FIELD QUALITY CONTROL

A. Testing: Contractor’s Independent Testing Agency shall provide compaction testing in accordance with AASHTO-T99, AASHTO-T238, and AASHTO-T239.

B. If tests indicate Work does not meet specified requirements, remove Work, replace and retest, at no additional cost to the government.

C. Frequency of Tests: Contractor’s Independent Testing Agency shall provide one compaction test for each lift.

REINFORCED CONCRETE & BOX CULVERTS 03300-1

SECTION 03300 - REINFORCED CONCRETE & BOX CULVERTS

1.1 SECTION INCLUDES

A. Formwork, shoring, bracing, and anchorage.

B. Concrete reinforcing and accessories.

C. Cast-in-place concrete for driveways and Box Culvert.

D. Precast Segmental Concrete Box Culverts

1.2 SUBMITTALS

A. Submit concrete design mixes.

B. Submit concrete field and lab test reports within 24 hours of completion of test results.

D. Submit the name and qualifications of an Independent Testing Agency which meets the requirements of ASTM E 329 “Standard Specification for Agencies Engaged in the Testing and/or Inspection of Materials Used in Construction,” to perform concrete testing required by these specifications.

E. Submit shop drawings of placement and mill reports of reinforcing steel.

F. If contractor elects to substitute pre-cast concrete box culverts or wing walls in place of cast-in-place concrete structures, submit manufacturer’s literature indicating the structures comply with ASTMC1433 or ASTM C1577 and ASTM C1786-19 for HS20-44 loading, manufactured in an NPCA Certified Plant, and submit complete design drawings for all structures and connections signed and stamped by a Professional Engineer registered in Oklahoma.

1.3 QUALITY ASSURANCE

A. Perform work in accordance with Section 509 of the Oklahoma Department of Transportation Standard Specifications for Highway Construction, unless the requirements of these specifications and drawings are more stringent.

REINFORCED CONCRETE & BOX CULVERTS 03300-2

B. Acquire cement and aggregate from same source for all work.

2.1 FORM MATERIALS AND ACCESSORIES

A. Comply with Section 502 of ODOT Standard Specifications.

B. Plywood form material shall be Softwood Plywood, PS 1, C plugged Grade or smoother.

C. Form Ties: Use snap off type, galvanized metal cone type with waterproofing washer free of defects that could leave holes larger than 1 inch in concrete surface.

D. Form Release Agent: Use colorless mineral oil which will not stain concrete, absorb moisture, or impair natural bonding or color characteristics of coating intended for use on concrete.

2.2 REINFORCING AND ACCESSORIES

A. Reinforcing Steel: Use ASTM A 615, grade 60 for deformed bars; use grade 40 for ties and stirrups.

B. Chairs, Bolsters, Bar Supports, Spacers: Size and shape for strength and support of reinforcement during concrete placement conditions. Special chairs, bolsters, bar supports, spacers adjacent to weather exposed concrete surfaces shall be plastic coated steel type; size and shape as required.

2.3 CONCRETE MATERIALS

A. Concrete shall meet the minimum requirements of Section 701 of the ODOT Standard Specifications and meeting the following requirements: 6000 psi compressive strength at 28 days; 4.5-7.5% air content; W/C ratio <50, 1-1/2 inch nominal maximum hard coarse aggregate size, 1-3 inches slump.

2.4 ADMIXTURES

A. Admixtures shall meet the requirements of Section 701 of the ODOT Standard Specifications.

REINFORCED CONCRETE & BOX CULVERTS 03300-3

2.5 CONCRETE MIX

A. Shall meet the requirements of Sections 509 and 701 of the ODOT Standard Specifications and the requirements in this specification. Cement shall be Type II or Type I/II.

B. The curing compounds shall meet the requirements of Section 701 of the ODOT

Standard Specifications, or approved equal.

3.1 EXAMINATION

A. Prepare subgrade and base for concrete structures and slabs per Section 02211 Earthwork.

B. Verify lines, levels, and centers before proceeding with formwork. Ensure that dimensions agree with the Drawings.

C. Verify that anchors, reinforcement and other items to be cast into concrete are accurately placed, positioned securely, and will not cause hardship in placing concrete.

3.2 FORMWORK ERECTION

A. Hand trim sides and bottom of earth forms. Remove loose soil prior to placing concrete.

B. Erect formwork, shoring and bracing to achieve design requirements.

C. Provide bracing to ensure stability of formwork. Shore or strengthen formwork subject to overstressing by construction loads.

D. Arrange and assemble formwork to permit dismantling, stripping and removal of remaining principal shores. Do not damage concrete during stripping.

E. Align joints and make watertight. Keep form joints to a minimum.

REINFORCED CONCRETE & BOX CULVERTS 03300-4

F. Provide chamfer strips on external corners of walls.

G. Apply form release agent prior to placement of reinforcing steel, anchoring devices, and embedded items.

H. Do not remove forms or bracing until concrete has gained sufficient strength to carry its own weight and other imposed loads without excessive deflection or creep.

3.3 REINFORCING PLACEMENT

A. Place, support and secure reinforcement against displacement. Do not deviate from required position.

B. Maintain concrete cover around reinforcing as follows:

Minimum cover, inches

Concrete cast against and permanently exposed to earth: 3

Concrete exposed to earth or weather:

#6 through #18 bars 2 #5 bar and smaller 1-1/2

3.4 PREPARATION

A. Prepare previously placed concrete by cleaning with steel brush and applying bonding agent in accordance with manufacturer’s instructions.

3.5 PLACING CONCRETE

A. Place concrete in accordance with Section 509 of the ODOT Standard Specifications.

B. Notify the Contracting Officer a minimum of 24 hours prior to commencement of concreting operations.

C. Ensure that reinforcement, inserts, embedded parts, formed joint fillers, joint devices, and formwork are not disturbed during concrete placement.

D. Place concrete continuously between predetermined contraction and construction joints.

REINFORCED CONCRETE & BOX CULVERTS 03300-5

E. For box culverts, place in accordance with ODOT Section 509.04, which requires base slab to set 24 hours before placing wall concrete, and other requirements.

F. Construction joints shall be placed in accordance with drawings and ODOT Section 509.04.

G. There shall be no joints in the approach drives.

3.6 CONCRETE FINISHING

A. Provide horizontal concrete surfaces above the waterline to be left exposed with a broom finish.

3.7 CURING AND PROTECTION

A. Immediately after placement, protect concrete from premature drying, excessively hot or cold temperatures, and mechanical injury.

B. Maintain concrete with minimal moisture loss at relatively constant temperature for period necessary for complete hydration of cement and hardening of concrete.

3.8 FIELD QUALITY CONTROL

A. The contractor shall pay for the services of an Independent Testing Agency which complies with the provisions of ASTM E 329 “Standard Specification for Agencies Engaged in the testing and/or Inspection of Materials Used in Construction,” to perform laboratory and field testing in accordance with the technical provisions ACI 301.

B. Provide unobstructed access to Work and cooperate with the Independent Testing

Agency.

C. Submit proposed mix design of each class of concrete to the COTR for review prior to commencement of Work.

D. The Contractor’s Independent Testing Agency shall take three concrete test cylinders for every 100 or less cubic yards of concrete placed each day.

E. The Contractor’s Independent Testing Agency shall take one additional test cylinder during cold weather concreting, to be cured on the job site under the same conditions as the cast-in-place concrete it represents.

REINFORCED CONCRETE & BOX CULVERTS 03300-6

F. At the start of the pour, and prior to placing more than 5% of the first truck’s contents, the Contractor’s Independent Testing Agency shall take one slump test and one air content test for each set of test cylinders taken.

3.9 DEFECTIVE CONCRETE

A. Defective concrete is concrete having excessive honeycomb, or embedded debris, or not conforming to required lines, details, dimensions, tolerances or specified requirements.

B. Do not patch, fill, touch-up, repair, or replace exposed concrete except upon express direction of the Contracting Officer for each individual area.

C. Repair or replace defective concrete, at no additional cost to the government, as directed by the Contracting Officer.

D. For failing tests, perform additional tests at no additional cost to the government, as directed by the Contracting Officer.