Attachment A - SOW Original - 040819.pdf

1A-1

DEPARTMENT OF TRANSPORTATION

FEDERAL AVIATION ADMINISTRATION

GREAT LAKES REGION

CHICAGO, ILLINOIS

September 25, 2018

SPECIFICATION FOR CONSTRUCTION OF THE RUNWAY 30

PRECISION APPROACH PATH INDICATOR (PAPI) FOUNDATIONS

AT Decatur Airport, IL

TABLE OF CONTENTS

DIVISION TITLE

1 GENERAL REQUIREMENTS

SECTION 1A - SPECIAL CONDITIONS

SECTION 1B - SAFETY ON AIRPORTS

2 SITE WORK

SECTION 2A - EARTHWORK AND SITE IMPROVEMENTS

SECTION 2B - CRUSHED AGGREGATE AND SITE

SURFACING

SECTION 2E - MISCELLANEOUS SITE IMPROVEMENTS

3 CONCRETE

SECTION 3A - CONCRETE FORMWORK AND REINFORCEMENT

SECTION 3B - CAST-IN-PLACE CONCRETE

13 SPECIAL CONSTRUCTION

SECTION 13C - PAPI SYSTEMS

16 ELECTRICAL

SECTION 16A - BASIC METHODS AND MATERIALS

SECTION 16B - 600-VOLT POWER CABLE FOR UNDERGROUND

INSTALLATION

SECTION 16C - 600-VOLT ARMORED POWER CABLE

SECTION 16E - CONTROL CABLE

SECTION 16F - CABLE INSTALLATION

SECTION 16G – CABLE TESTING

APPENDIX TITLE

1 EOSH STUDIES

Attachment 1 EOSH IMPACTS Attachment 2 EOSH CHECKLIST Attachment 3 3900-17 FORM Attachment 4 3900-18 FORM

2 DRAWINGS

3 TECHNICAL REFERENCE DATA RECORD FORM

1A-2

DIVISION 1 - GENERAL REQUIREMENTS

SECTION 1A

SPECIAL CONDITIONS

1A.1 SCOPE.

a. Description. This Specification covers general requirements for construction of Precision Approach Path Indicator (PAPI) System. In general, all parts of this Specification covering construction required on project drawings and in other Contract documents are applicable to this Contract.

The Contractor shall furnish all plant, labor, materials (except Government-furnished property), equipment, energy, transportation, and other services necessary to construct all elements of the systems required in the Specifications, Drawings, and other Contract documents. Construction shall include all miscellaneous and incidental work necessary for a complete and operational system, whether or not such work is specifically shown or specified.

Work shall include:

1. Contract a Registered Land Surveyor (RLS) to properly layout the PAPI Lamp Housing Assemblies (LHA) and provide horizontal and vertical control.

2. Coordinate with local FAA SSC personnel, airport maintenance personnel, and commercial cable locators to locate and mark underground utilities prior to digging.

3. Carefully pull back all control and power cables. Remove PAPI LHAs and store at a location approved by the FAA.

4. Remove existing screw anchor foundations for the LHAs.

Care shall be taken so to not damage existing cables.

5. Construct concrete foundation for PAPI LHAs.

6. Remove existing and furnish and install new perimeter earth electrode system (EES) around PAPI LHAs.

7. Reinstall PAPI LHAs.

8. Contractor shall reuse existing power conductors but shall furnish and install new control cables. Both shall be installed in new conduit per the plans.

9. All power and control cables shall be tested for continuity and insulation integrity per Section 16G of these specifications after installation in the presence of the COR and SSC technician.

10. Contractor shall verify that PAPI will operate normally on local control and shall test photocell. See section 13c.5 for system control types and descriptions.

11. Construct crushed rock plot around PAPI LHAs per Section 2B of these specifications.

12. Aim each LHAs per Technical Instruction Manual.

13. Restore, regrade, and seed any turf areas disturbed by construction per Section 2D of these specifications.

14. Contractor shall participate in Contractor’s Acceptance Inspection (CAI), and quickly address any punch list

1A-3 items. CAI may be conducted in conjunction with Joint Acceptance Inspection (JAI) with the SSC Office.

b. Runway Shutdown Coordination. Any work that will be conducted inside the Runway Safety Area (RSA) will require a runway shutdown and shall be coordinated well in advance through the COR. The contractor shall stay clear of the RSA unless a runway shutdown has been requested.

c. Schedule. After the award of the contract and prior to starting work, the contractor must submit to the Contracting Officer Representative (COR) a satisfactory progress schedule which must show the proposed sequence of work and the number of working days set up in the contract.

The contractor must confer with the COR at regular intervals in regard to the prosecution of the work according to the progress schedule.

A working day is defined as follows: Monday through Friday, length of a work day is no less than 8 hours and no more than 10 hours. No work will be performed on federal holidays.

The COR will determine which days are workable.

A partial working day of one-half will be charged under the following conditions:

1. When weather conditions do not permit the completion of a full day’s work.

2. When job conditions due to recent weather do not permit full efficiency of the men or equipment.

3. A shortage of help which is beyond the contractor’s control prevents reasonable progress.

4. When any condition over which the contractor has no control prevents completing a full day’s production.

No working day will be charged under the following conditions:

1. When adverse weather prevents work.

2. When job conditions due to recent weather prevent work.

3. When work has been suspended by an act or an omission of the FAA.

4. When any condition over which the contractor has no control causes suspension of work.

1A.2 GOVERNMENT-FURNISHED Material (GFM). No Government-furnished

Material is provided under this contract.

1A.3 CONTRACTOR-FURNISHED MATERIAL. The Contractor shall furnish all material under this contract. The Contractor shall be aware that certain materials to be furnished by the Contractor, may be long-lead-time items. Therefore, the successful bidder should determine the availability of all material immediately after Contract award, 1A-4 and initiate procurement action on long-lead-time items at the earliest possible date. Where the Specifications mention material or equipment by brand, it is regarded as a known acceptable source, as it meets Specifications.

1A.4 SUBMITTALS AND BRAND NAME USAGE.

a. Introduction. Each product required for use in the Contract Drawings and Specifications must meet the actual minimum needs of the Government as demonstrated in the salient characteristics for that product. If a brand name product is used in the Drawings or Specifications, it should be regarded as a "known acceptable source" (i.e., a product that meets the actual minimum needs, and demonstrates the appropriate salient characteristics). The product used can be identical or equal to the brand name product or known acceptable source in meeting the salient characteristics, but it need not exceed the actual minimum requirements. Any brand name product or known acceptable source mentioned will, however, not be required for use in order to comply with the Specification or Drawing unless those documents make it clear that the brand name product is required, and substitution is prohibited. The following submittal procedure shall be followed in order to:

1. Insure adherence to functional and quality standards in substitution of Contractor-furnished material.

2. Provide manufacturers catalog sheets for all material to be furnished and installed by the contractor.

b. Definition. A submittal is a collection of information required by Specifications, or by the Contracting Officer, presenting detailed information on:

1. Material or equipment items the Contractor proposes to use.

2. Methods or plans of action which the Contractor intends to employ in specific situations.

c. Requirements. All products that a Contractor wishes to use must be approved before use by the Project Engineer or the Contracting Officer's Representative (COR). To gain approval, the Contractor must submit documents and/or samples that demonstrate the product clearly meets the Government's minimum needs, and demonstrates appropriate salient characteristics. All submittals must be in writing. The Contracting Officer shall have the right to require submittals from the Contractor where the Contractor makes an unsolicited change proposal. The information presented in a submittal shall be sufficient to demonstrate that all Specification requirements for the subject material, equipment, methods, or plans are met by the Contractor's proposal. The informational materials may include documents such as shop drawings, sketches, calculations, data sheets, written plans of action, manufacturers' catalog cuts, brochures, and/or specification sheets. If the Specifications or Contracting Officer requires actual samples of material or equipment, the Contractor shall provide them.

1A-5

d. Submittal Review. When submitting before the Notice to Proceed date, the Contractor shall send the submittal package(s) directly to the Contracting Officer. When submitting after Contract work has begun, the Contractor shall give submittal packages to the COR, who will forward them promptly to the Contracting Officer or Project Engineer.

The Contracting Officer may personally evaluate the submittal, or request Project Engineer to evaluate it. In either case, the submittal will return directly from the Contracting Officer to the Contractor, with the Contracting Officer's approval, approval with comments, or disapproval.

e. Submittal Time Frame. To provide adequate time for document transmission and submittal review, the FAA reserves the right to take two weeks to complete a review, transmission date to transmission date. Terminal navigational aid contracts are brief contracts. The review process can therefore span a substantial portion of the contract period. For this reason:

1. The Contractor is urged to initiate submittals as soon as feasible after contract award, and to expedite document transmission.

2. The Project Engineer and other reviewers (if any) will expedite reviews and document transmission insofar as feasible.

Maximum use of fast document transmission modes (e.g. email, fax, etc.) is encouraged.

f. Procurement Before Approval. The Contractor is advised not to procure any item for which submittal approval is required but not yet granted. If approval is denied, the Contractor will be prevented from installing the disapproved item(s). The Contractor must transmit a new submittal package for the new items replacing the disapproved items, and must procure only approved items. The Contractor shall take responsibility for the delivery and installation of any items installed before submittal approval is granted. The FAA reserves the right to discontinue field work on any item furnished without submittal approval.

1A.5 PRE-CONSTRUCTION CONFERENCE. The Contractor shall attend a pre-construction conference when required by the Contracting Officer.

The Contractor shall abide by all agreements reached at the conference regarding safety practices, ingress and egress routes to the site, maintenance of airport security (locking gates, etc.), deference to air traffic, and other operational procedures.

1A.6 COORDINATION. All coordination between the Contractor and the airport management and local FAA personnel, shall be accomplished through the COR.

1A.7 COMPLIANCE WITH LOCAL AND OTHER CODES. The Contractor shall comply with standards (e.g., National Electrical Code) adopted by the Contract documents, and with local and other codes. Where the requirements of the Specifications and Drawings exceed those of the adopted and local codes, the Contractor shall comply with the requirements of the Specifications and Drawings.

1A-6

1A.8 SANITARY FACILITIES. Sanitary facilities are not available at the work sites. The Contractor shall provide temporary toilet facilities for their employees as required by OSHA regulations.

The locations of the toilet facilities shall be where directed by the COR.

1B-1

DIVISION 1 - GENERAL REQUIREMENTS

SECTION 1B

SAFETY ON AIRPORTS

1B.1 DEFINITIONS.

a. Classified Area. For classified area such as the Runway Safety Area (RSA), Object Free Area (OFA), or any other critical areas refer to the plans. Classified areas are specific for every site.

1B.2 GENERAL PRECAUTIONS. The Contractor shall abide by all requirements as specified herein, in the Contract clauses, on the construction safety plan, and as established by airport authorities in the pre-construction conference. The Contractor shall be responsible for thoroughly explaining all safety and security precautions required on the airport to all workmen, both under his direct employment and under his subcontractors.

1B.3 CONSTRUCTION WITHIN CLASSIFIED AREAS.

a. Restrictions.

1. Construction within or access through classified areas will not be permitted whenever runways or taxiways defining the classified areas are being used for aircraft operations.

2. If runways and taxiways within classified areas are required to remain open, construction within the classified areas will be interrupted as necessary to permit normal aircraft operations. No person is allowed in the RSA when runway is in operation.

b. Time Frame. All construction within classified areas shall be completed within the shortest possible time. Construction shall be performed continuously during normal working hours, except as otherwise specified, until all work within the classified areas is completed. Contractor and COR shall coordinate with Airport Authority, FAA technical operations, and FAA air traffic to ensure all stakeholders are informed of project schedule and work progress.

1B.4 CONSTRUCTION WITHIN UNCLASSIFIED AREAS. Construction will be permitted within unclassified areas while aircraft are using adjacent runways and taxiways, excepting as specified elsewhere or established during the pre-construction conference.

1B.5 MAINTENANCE OF AIRCRAFT OPERATING SURFACES. Soil, debris, or loose materials dropped or tracked onto airport roads, runways, taxiways, and ramps shall be immediately swept up and removed.

Likewise, all loose material at the job site or dropped enroute to the job site which can be blown onto the above aircraft surfaces shall be immediately placed in closed containers to prevent damage to aircraft.

1B.6 EQUIPMENT PARKING. All equipment not in use at the close of each day shall be parked in the staging area provided in the construction and safety plan or as directed by the COR.

1B-2

1B.7 RADIO COMMUNICATIONS. At airports served by airport traffic control towers or airport owner/operator radio communications facilities, (if so directed by the airport management), the Contractor shall furnish and operate two-way radio communications with these facilities when personnel, vehicles, and equipment are required to enter the aircraft operations area, to obtain proper clearance for construction hazards to aircraft, and at all other times established during the pre-construction conference.

1B.8 ADVISORY CIRCULAR.

As a minimum, the Contractor shall adhere to all requirements of Advisory Circular AC 150/5370-2F, "Operational Safety on Airports During Construction". This document is available at [http://www.faa.gov/documentLibrary/media/Advisory_Circular/150_5 370_2f.pdf.]

2A-1

DIVISION 2 - SITE WORK

SECTION 2A

EARTHWORK AND SITE IMPROVEMENTS

2A.1 DESCRIPTION OF WORK. The extent of earthwork is indicated on the drawings and by the provisions of this section.

2A.2 QUALITY ASSURANCE.

a. Codes and Standards. Perform all earthwork in compliance with applicable requirements of governing authorities having jurisdiction.

b. Testing and Inspection.

1. Soil materials, moisture content, and degree of compaction shall conform to ASTM specifications referenced herein. Professional soil testing methods associated with this specification will generally not be required, but the FAA reserves the right to engage a state-licensed soil testing service to resolve disputes regarding adequacy of all earthwork performed.

2. Visual inspection and qualitative testing shall be performed by the contractor in the presence of, and wherever directed by, the COR.

2A.3 SAFETY REQUIREMENTS.

a. Refer to Division 1 Section 1B for construction within classified and unclassified areas.

b. To protect life, property, and work, all earthwork operations shall be performed in compliance with local and OSHA requirements. The Contractor shall provide all sheeting, shoring, and other bracing as necessary.

c. All trenches in classified areas shall be excavated and backfilled during the same day.

2A.4 JOB CONDITIONS

a. Existing Utilities.

1. Locate all underground cables, utility lines, and other underground construction before beginning excavation work. Any damage to such lines or construction belonging to the FAA, utility companies, or others, shall be promptly repaired, at contractor's expense, to the complete satisfaction of the owner.

2. Project drawings generally indicate locations of cables maintained by the Federal Aviation Administration only.

The FAA will mark with paint or flags the approximate locations of its own cables. Provide a minimum of 48 hour notice to COR prior to digging so that the cables can be marked.

b. Weather Conditions.

1. Excavating and backfilling for foundations and trenches shall not proceed when excessively wet or freezing weather conditions could adversely affect the load-

2A-2 bearing characteristics of the soil, or prevent proper compaction.

2. When freezing weather is expected, excavations shall not be made to full depth unless concrete or conduits can be placed immediately. If an excavation is already at full depth, the excavation shall be protected from frost.

c. Drainage.

1. All excavations shall be continually drained by natural means or pumping to prevent any decrease in soil bearing capacity or damage to poured foundations or to trenches.

2. Provide and maintain pumps, well points, sumps, suction and discharge lines, and other dewatering system components necessary to convey water away from excavations.

3. Establish and maintain temporary drainage ditches and other diversions outside excavations limits to convey rain water and water removed from excavations to collecting or run-off areas. Do not use trench excavations as temporary drainage ditches.

2A.5 MATERIALS.

a. Structure and Foundation Materials. In-place undisturbed inorganic soils will be adequate to support all project structures, unless otherwise indicated. Highly organic soils (topsoil, peat, and swamp location soils) shall be removed entirely from areas to be occupied by structures.

b. Backfill and Fill. Material shall be inorganic soil excavated from site, or borrow comprised of inorganic soil approved by the COR. All such soils shall be free of rock, gravel, and cohesive lumps greater than two inches in any direction, and debris, waste, vegetation, frozen material, and other deleterious materials.

c. Base Course for Concrete Slabs. Material shall be a graded mixture of washed crushed stone or crushed or uncrushed gravel with 100% passing a 1 1/2 inch sieve, and not more than 5% passing a number 4 sieve.

2A.6 EXCAVATION

a. Excavation Classification. Excavation is unclassified and includes excavation to subgrade elevation indicated, regardless of character of materials and obstructions encountered excepting as qualified herein.

b. Rock Excavation. If rock is encountered above the design footing elevations of any facility structure, such foundation shall bear entirely on clean solid rock or on soil, but not on both. If the soil-and-rock bearing condition is encountered, the COR will determine which material shall support the structure. If rock surface is used, it shall be reasonably level or shall be stepped to make level segments.

c. Unauthorized Excavation. Removal of materials beyond design subgrade elevations or dimensions without specific direction from the COR constitutes unauthorized excavation. Remedial

2A-3 work for such excess excavation shall be as directed by the COR at the Contractor's expense.

d. Additional Excavation. When any excavation has reached required subgrade elevation, notify the COR, who will inspect soil conditions. If the COR determines that the soil possesses inadequate bearing capacity, carry such excavation deeper as directed by the COR.

e. Excavation for Structures.

1. Conform to elevations and dimensions shown within a tolerance of plus or minus 0.10 foot, and extending a sufficient distance from footings and foundations to permit placing and removal of concrete formwork, installation of services and other construction, and for inspection.

2. In excavating for footings and foundations, remove loose soil and compact bottom of hole prior to placing reinforcement and concrete.

f. Excavation for Cable and Conduit Trenches.

1. Excavate in compliance with lines and depths shown on drawings. Minimum trench depth shall allow for cables to be installed at the depths specified in Paragraph 16F.3b(2), unless otherwise specified.

2. Grade bottom surfaces of trenches to provide uniform bearing and continuous support for cable and conduit.

3. Material excavated in excess by error, or due to unsuitable bearing shall be replaced with mechanically compacted inorganic soil.

4. If solid rock is encountered, the COR will decide if such rock need be removed or if an alternate trench route or lesser depth conduit installation will be acceptable.

5. If a trench must cross a concrete or asphalt paved surface, all cuts shall be saw cuts, unless otherwise specified.

2A.7 COMPACTION

a. General.

1. All compaction shall be accomplished by using power-operated mechanical equipment except for limited use of manual tampers in constricted areas. Operate all power equipment as herein specified to achieve the minimum degree of compaction subject to acceptance by testing.

2. Cohesive soils are defined herein as those containing less than 60 percent sand, gravel, or stone. Percentages greater than 60 percent are herein termed non-cohesive soils.

b. Cohesive Soil Compaction.

1. Use sheepsfoot roller of such minimum weight that at least 200 psi will be transmitted to surface area of studs or feet. Operate at speeds not exceeding 4 mph on each layer of fill until roller walks itself to top of grade.

2A-4

2. Use motor-operated soil tamper (stomper) in confined areas, including trenches, on each layer of fill until no further visible consolidation is evident.

3. Use a heavy blunt tamping rod on each layer of fill in the most constricted locations where power equipment cannot be used.

c. Non-Cohesive Soil Compaction.

1. Use pneumatic tire roller fully loaded and weighing not less than 275 pounds per inch of tire tread width.

Operate at speeds not exceeding 4 mph. A minimum of ten passes of the roller is required on each layer of fill.

2. Use motor-operated vibratory tamper in confined areas, including trenches, on each layer of fill until no further visible consolidation is evident.

3. Use heavy blunt tamping rods on each fill layer in constricted locations where power equipment cannot be used.

d. Moisture Control.

1. Where soil material must be moisture-conditioned before compaction, uniformly apply water to a layer of soil material in such quantity that free water will not appear on the surface during or subsequent to compaction operations.

2. Scarify and air-dry soil material that is too wet to permit compaction to specified density.

e. Percentage of Maximum Density Requirements.

1. General Requirements. The required densities for cohesive and non-cohesive soils are determined by quantitative testing procedures defined by ASTM Standards D 1557 and D 4253/4254, respectively. To assure compliance, the Contractor may arrange for such professional soil testing services, at no additional cost to the Government. The FAA, at its expense, may also make such arrangements if qualitative testing procedures appear inadequate.

2. Turf and Non-Vehicular Surfaced Areas. Compact top surfaces of subgrade and each layer of backfill or fill material to 90% of maximum density for cohesive soils, or to 90% relative density for non-cohesive material.

f. Qualitative Testing and Inspection Procedures.

1. General. The Contractor shall perform qualitative soil compaction testing and inspection procedures for each type of backfill or fill material used wherever directed by, and in the presence of, the COR. Special attention shall be given to the backfilling of structures and trenches.

2. Qualitative Testing.

(1) Qualitative soil testing will consist of comparing the resistance to penetration of undisturbed soil to that of compacted backfill of the same composition. For

2A-5 borrow material the penetration comparison shall be made between maximum test sample density and in-place fill density.

(2) A soil penetration device (penetrometer) indicating depth and force exerted shall be utilized. Compaction will be adequate if backfill or fill possesses at least 95% of the resistance to penetration of undisturbed soil or test sample, respectively.

(3) Borrow test sample shall be a four inch deep (compacted measurement) layer of soil, aerated or moistened as directed by the COR, and compacted by power equipment until no further consolidation occurs, as approved by the COR.

2A.8 BACKFILL AND FILL.

a. Structure Foundations. Backfill or fill as promptly as work permits, but not until completion of the following:

1. Acceptance of construction below grade.

2. Recording locations of underground conduit.

3. Removal of concrete formwork, bracing, trash, and debris.

b. Ground Surface Preparation. Remove vegetation, debris, topsoil, and unsatisfactory subsoil from ground surface, and compact the subgrade, prior to placement of fill layers.

c. Placement and Compaction.

1. Place acceptable backfill and fill materials in layers not more than eight inches in loose depth for material to be compacted by heavy equipment, and not more than four inches in loose depth for material to be compacted by hand-operated tampers.

2. Before compaction, moisten or aerate each layer as necessary to provide optimum moisture content. Do not place backfill or fill on water, ice, snow, frozen soil, or excessively wet soil.

d. Cable Trench Backfill.

1. Before laying cables, inspect the bottom of the cable trench. If it is not smooth, or if any rock or stone that would be retained on a 1/4-inch sieve is present, place a two-inch layer of bedding material, according to Paragraph (2) below, in the trench. Do not compact this layer. Lay cables on top of this layer.

2. The first layer of backfill material over cables shall be three inches deep, loose measurement, and shall be sand or other homogeneous inorganic soil containing no mineral aggregate particles that would be retained on a 1/4-inch sieve. This layer shall not be mechanically compacted.

3. The second layer, in turf and crushed rock surface areas, shall be four inches deep, loose measurement, and shall contain no mineral aggregate particles that would be retained on a one-inch sieve. Subsequent layers shall be clean soil containing no rock particles larger than two inches in their largest dimension.

2A-6

4. Except for surfacing material, all layers of trench backfill, for areas to be surfaced with crushed rock, shall be sand, placed and compacted as required

(1) If a trench crosses an area surfaced with crushed rock, the top 12 inches of trench backfill shall be crushed rock. The finished grade elevation of the crushed rock backfill shall equal the grade elevation of existing adjacent crushed rock.

e. Backfill and Fill Surface Elevations. Finished grade, shown on the drawings, is the top surface of turf and crushed rock or crushed stone surfaced areas. Therefore, make allowances for six inches of topsoil and depths as detailed or specified for surfaced areas when establishing top surface of fill or backfill.

2A.9 GRADING.

a. General. Uniformly grade areas within limits of grading, including adjacent transition area. Smooth the finished surfaces within specified tolerances, and compact with uniform slopes between points where elevations are indicated, or between such points and existing grades.

2A.10 MAINTENANCE.

a. Protection of Graded Areas. Protect newly graded areas from traffic and erosion. Keep free of trash and debris.

b. Reconditioning. Where compacted areas are disturbed by construction operations, adverse weather, or where any settlement has occurred, scarify surface, add acceptable fill, reshape, grade, and compact as necessary.

2A.11 DISPOSAL OF EXCESS AND WASTE MATERIALS. Remove and dispose of all excess soil and waste material from the project site and adjacent lands. All costs associated with disposal shall be at Contractor's expense.

2B-1

DIVISION 2 - SITEWORK

SECTION 2B

CRUSHED AGGREGATE AND SITE SURFACING

2B.1 DESCRIPTION OF WORK. The extent of work is indicated on the drawings and by the provisions of this section.

2B.2 STATE SPEIFICATIONS. State highway construction specifications, latest edition, form a part of this Specification and are applicable for all work unless otherwise specified. This referenced specification will be hereinafter referred to as "State Specifications”. Disregard all references in the State Specifications to layout of work by others, and to measurements and payments. All layout work will be accomplished by the Contractor, and payment for all work under this section will be a part of the lump-sum contract.

2B.3 MATERIALS.

a. Landscape Fabric.

1. Application. Landscape fabric shall be applied under all non-roadway crushed rock surfacing. In these applications, landscape fabric is placed over prepared walkway subgrade soil, and crushed aggregate is placed and compacted on top of the landscape fabric.

2. Landscape Fabric Selection Criteria. The landscape fabric fibers shall be a needle punched nonwoven geotextile composed of polypropylene, polyester, polyolefin, or polyamide fibers. The fabric shall be resistant to chemical attack, mildew, and rot. The fabric shall conform to the physical property requirements listed in the following table. All values shall represent certifiable minimum values in the weakest principle direction of the fabric.

Property Test Method Requirement

Grab Tensile Strength ASTM D-4632 120 lbs Grab Elongation ASTM D-4632 50%

Trapezoidal Tear ASTM D-4533 50lbs CBR Puncture Strength ASTM D-6241 310 lbs Apparent Opening Size ASTM D-4751 U.S. Sieve #70, max Permittivity ASTM D-4491 1.7 sec-1 Flow Rate ASTM D-4491 135 gpm/ft2

Mirafi 140N manufactured by Royal Ten Cate Corporation is one of the products which meets these Specifications.

For any substitution, provide the Contracting Officer with complete product literature, including values of the properties tabulated above, and a sample of fabric.

Do not procure any substitute before receiving the Contracting Officer's approval. See Paragraph 1A.4 above.

2B-2

3. Landscape Fabric Width. Fabric width shall be 3 feet wide for a 3-foot-wide crushed rock walkway. Fabric in other walkway areas shall be cut to fit, and overlapped per Paragraph 2B.4c(2)(b), below, to fully cover such areas.

b. Crushed Aggregate Surfacing.

1. Crushed rock or crushed stone aggregate shall comply with

State Specification quality requirements for crushed rock or crushed stone used for road surface course, and shall be of the State gradation most closely conforming with the following gradation:

Sieve Size Total Passing, Percent 1-inch 100

3/4-inch 80-100 3/8"-inch 30-60

No. 4 48-65 No. 8 35-50 No. 30 19-30 No. 50 13-23 No. 100 7-15

No. 200 0-8

2. A certified sieve analysis, referenced to State Specification gradation, shall be submitted to the COR for approval.

2B.4 CONSTRUCTION.

a. General Requirements. All earthwork requirements in Section 2A for areas to receive surfacing are applicable, excepting as qualified herein. Where the additional work or more stringent requirements in this section conflict with Section 2A, requirements herein shall prevail.

b. Foundation Preparation.

1. Foundation Material. All topsoil shall be removed from areas to receive paving and surfacing or fill under such surfaces. Only inorganic soil shall exist under surfaced or paved areas.

2. Compaction. Compact as required in Section 2A.

3. Grading. Shape with motor grader to achieve such surface trueness that when tested with a 10-foot straightedge, no deviation greater than 1/2-inch shall exist.

4. Corrective Work. Any ruts or soft-yielding spots that may appear in the subgrade, any areas having inadequate compaction, and deviations of the surface from the requirements specified shall be corrected by loosening, removing, and adding approved material and reshaping and recompacting the affected areas to line and grade, and to the specified density.

2B-3

c. Landscape Fabric.

1. General. Landscape fabric, if required on the drawings, shall be installed on prepared subgrade for all areas that will experience pedestrian traffic.

2. Construction Requirements.

a) Prepared subgrade and foundations shall be compacted smooth and level as specified elsewhere and as shown on the drawings.

b) The fabric shall be rolled out directly upon the prepared surface, and shall not be dragged over any surface. Fabric in place shall have a smooth surface and shall be free of folds, wrinkles, cuts, or other imperfections. Individual panels of fabric shall be overlapped at least 24 inches, with the preceding layer overlapping the following layer in the direction that surfacing material will be spread. No vehicular traffic will be permitted directly upon the fabric.

d. Crushed Aggregate Surfaced Areas.

1. Spreading. Crushed aggregate surfaced areas shall be constructed in one or more layers of maximum 6-inch compacted thickness each. . The aggregate shall be back-dumped on the fabric, and machine spread in the direction of overlap.When deposited, the aggregate shall be free from segregation, and shall require minimum blading or manipulation.

2. Compaction and Grading.

a) Each layer of aggregate shall be compacted using equipment required in the State Specifications. For compacting aggregate on landscape fabric, use a smooth-drum roller. Compaction shall closely follow the spreading operation to prevent loss of contained moisture or displacement of materials.

b) When the surface stability of the crushed aggregate cannot be obtained due to lack of fines, additional fines shall be added to the upper portion of the course in an amount sufficient to secure stability, at no additional cost to the Government. In no case, however, shall the quantity of fines added increase the percent passing the Number 200 sieve by more than 15% in the upper portion.

c) Any irregularities or depressions that develop in the layers under rolling operations shall be corrected by loosening the material and removing or adding aggregate and rerolling. The rolling shall be continued until the surface is shown to be smooth and uniform, and to such trueness that when tested with a 10-foot straightedge it shall not show any deviation in excess of 1/4-inch.

At all places not accessible to the roller, the

2B-4 aggregate of each layer shall be tamped separately and compacted to grade and line with mechanical tampers.

d) If any subgrade material is worked into the aggregate material during the compacting or finishing operations, all granular material within the affected areas shall be removed and replaced with new aggregate. The COR may restrict hauling or traffic over the completed or partially completed base after inclement weather or at any time when the subgrade is soft, and there is a tendency for the subgrade material to work into the base material.

e) If considered necessary by the COR, water shall be applied to each layer to aid in compaction and prevent segregation of the material. Disc or harrow surfacing material during moistening operations to secure uniform moisture distribution. Add water in a manner that will not soften the subgrade. All work associated with the additional water shall be accomplished at no additional cost to the Government.

f) The aggregate shall be compacted to 95% maximum density as determined by AASHTO-T99. Compaction shall continue until no further discernible compaction is evidenced under action of the compaction equipment.

If in the opinion of the COR, the required degree of compaction has not been achieved, testing in accordance with the standard will be conducted and paid for by the Government. If testing confirms unacceptable compaction, reconstruction or other remedial work may be required by the Contractor at no additional cost to the Government.

2D-1

DIVISION - SITEWORK

SECTION 2D

TOPSOIL AND GRASS COVER

2D.1 DESCRIPTION OF WORK. The extent of topsoil placement and establishment of grass cover is indicated on the drawings and the provisions of this section.

2D.2 GENERAL REQUIREMENTS. All areas of the project site cable trench routes, which will not be occupied by pavement, crushed rock/stone surfacing, or other construction, shall receive preparation and grass seed planting and maintenance. Included in this work will be off-site turf reconditioning and replacement for those areas damaged by construction operations.

2D.3 MATERIALS.

a. Topsoil. Material shall be that removed from project site location preparatory to trenching and site construction.

Reuse only that part of stockpiled topsoil reasonably free of subsoil, trash, roots, stumps, weeds, debris, litter, and stones larger than 2 inches.

b. Fertilizer. Provide complete fertilizer of 5-10-5 composition (percentages of nitrogen, phosphorous, and potash, respectively).

c. Grass Seed. Provide fresh, clean, new-crop seed complying with tolerance for purity and germination established by Official Seed Analysts of North America. Provide the following seed mixture composed of grass species and proportions:

Proportion by Weight Common Name

45% Kentucky Bluegrass 5% Perennial Ryegrass 35% Redtop 15% White Clover

d. Anti-Erosion Mulch. Provide clear, seed-free salt hay or threshed straw of wheat, rye, oats, or barley. Anchor the mulch sufficiently to prevent it from being blown away.

2D.4 PREPARATION FOR PLANTING.

a. Subsurface Preparation. After completion of all construction operations that could disturb topsoil areas, subgrades shall be cleared free of waste and stones larger than 2 inches, then tilled to a depth of 3 inches, and graded to remove surface irregularities.

b. Topsoil and Surface Preparation. Spread topsoil uniformly to provide a 6-inch layer, after compaction, on all fill and backfilled areas to receive grass seed. Compact with a roller weighing 85 to 100 pounds per foot of width. Subgrade and

2D-2 topsoil shall be damp when work is performed, but not wet, dusty, or frozen.

c. Preparation of Unchanged Grades. Where seed will be planted in areas that have not been altered by grading, prepare soil for planting as follows: till to a depth of 6 inches, apply fertilizer, remove high areas and fill depressions, till soil to a homogenous mixture of fine texture, free of lumps, stones, roots, and trash, and compact as above.

d. Fertilizer. Apply fertilizer at the rate of 30 pounds per 1000 square feet of area. Mix fertilizer into top 2 inches of topsoil.

e. Surface Preparation. Fine grade to a smooth, even surface and to a loose, uniformly fine texture. Roll, rake, and drag seeded areas, remove ridges, and fill depressions as necessary to meet finish grades. Limit work to areas that can be planted immediately. Moisten prepared areas before planting if soil is dry. Allow surface mixture to dry and proceed with seeding.

2D.5 SEEDING.

a. Seed Condition. Do not use old, wet, or moldy seed. The seed shall be dated with the year in which it is being applied.

b. Sowing. Use spreader or sowing machine. Do not seed when wind velocity exceeds 5 mph. Distribute seed evenly over entire area by sowing equal quantities in two directions at right angles to each other. Seed at rate of 5 pounds of seed per 1000 square feet of area. Rake seed lightly into top 1/8 inch of soil, roll lightly, and water with a fine spray.

c. Protection. Spread mulch uniformly to form a continuous loose blanket after completion of seeding operations. Anchor the mulch sufficiently to prevent it from being blown away.

2D.6 MAINTENANCE. Maintain for a period of 60 days after seeding. If maintenance for a 60-day period is not feasible, the Contractor shall use a commercially available mix of seed, fertilizer, and long-lasting mulch, or a pre-seeded anchored mat that can be maintained less frequently with the same results. Water, fertilize, regrade, and replant as required to establish smooth, acceptable turf.

2E-1

DIVISION 2 - SITE WORK

SECTION 2E

MISCELLANEOUS SITE IMPROVEMENTS

2E.1 DESCRIPTION OF WORK. The extent of miscellaneous site work is indicated on the drawings and by the provisions of this section.

2E.2 REMOVAL OF EXISTING FOUNDATIONS. All foundations of removed structures shall be removed completely and new concrete foundations shall be constructed.

2E.3 REPLACEMENT OF SURFACING AGGREGATE. For replacement of surfacing aggregate see Paragraph 2B.4dabove.

2E.4 SPECIAL SURFACING.

a. General. If required on the drawings, surfacing for PAPI light units, and all other small surfacing areas within 300 feet of runway and taxiway edges, shall be the material placed as required below. Special surfacing requirements will preclude displacement onto aircraft operating surfaces.

b. Material and Installation. Crushed rock or crushed stone surfacing at light unit locations shall be 6 inches deep and centered on the units. Material shall be 1 1/2 to 2 inches nominal size washed crushed rock. No substitutions will be accepted. Rock shall be tamped as tightly as material permits. Finished surface shall be flush with existing surrounding grade.

3A-1

DIVISION 3 - CONCRETE

SECTION 3A

CONCRETE FORMWORK AND REINFORCEMENT

3A.1 DESCRIPTION OF WORK. Extent of work is indicated on the drawings and by the requirements of this section.

3A.2 CONCRETE FORMWORK.

a. Design of Forms. Forms shall conform to shapes, lines, and dimensions of the members shown on the plans, and shall be sufficiently tight to prevent leakage of mortar. They shall be properly tied together so as to maintain position and shape.

b. Form Removal. Forms shall not be loosened or removed until the concrete members have acquired strength sufficient to support their own weight. No additional loads shall be placed on the concrete for at least 48 hours after placing.

c. Form Ties. Form ties for concrete shall be of a type that will break back 1 1/2 inches from the concrete surface. Ties shall be removed to a minimum depth of 1 1/2 inches, and the surface patched.

3A.3 CONCRETE REINFORCEMENT.

a. Materials. Reinforcement bars shall conform to "Standard Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement", ASTM A-615. All bars shall be Grade 60 deformed bars.

b. Cleaning and Bending Reinforcement. At the time concrete is placed, metal reinforcement shall be free from rust scale or other coatings that will destroy or reduce the bond. All bent bars shall be bent cold. No bars partially embedded in concrete shall be field bent except as shown on plans.

c. Placing Reinforcement. Metal reinforcement shall be accurately placed according to the plans and adequately secured in position by concrete, metal, or other approved chairs, spacers, or ties.

d. Splices in Reinforcement. No splices or reinforcement shall be made except as shown on the plans or as authorized by the

COR.

e. Concrete Protection for Reinforcement. The reinforcement shall be protected by the thickness of concrete shown on the drawings. Where not shown, the thickness of concrete over the reinforcement shall be as follows:

1. Where concrete is deposited against the ground without the use of forms, not less than 3 inches.

2. Where concrete is exposed to the weather or to the ground but placed in forms, not less than 2 inches for bars larger than number 5, and 1 1/2 inches for number 5 bars or smaller.

3B-1

DIVISION 3 - CONCRETE

SECTION 3B

CAST-IN-PLACE CONCRETE

3B.1 DESCRIPTION OF WORK. The extent of work is indicated on the drawings and by the provisions of this section.

3B.2 MATERIALS. Cement shall conform to Specification for Portland

Cement ASTM C-150, Type I, or Specification for Air-Entraining Portland Cement ASTM C-175, Type 1A, unless otherwise specified.

The concrete shall have a minimum 28-day compressive strength of 3,000 PSI, a maximum slump of 4 inches, and a maximum aggregate size of 1-inch. The concrete mix shall contain an air-entraining admixture. Air content shall be 5 to 7 percent. The Contractor shall give the COR a certificate from the concrete supplier, bearing the intended job mix and certifying that the concrete delivered will meet the above requirements. The Contractor shall obtain approval of the job mix from the COR prior to placing concrete.

3B.3 PREPARATION OF EQUIPMENT AND PLACE OF DEPOSIT.

a. Before placement, all equipment for mixing and transporting the concrete shall be cleaned. All debris and ice shall be removed from the places to be occupied by the concrete.

Forms shall be thoroughly wetted (except in freezing weather) and oiled prior to placing reinforcing steel. The reinforcement shall be thoroughly cleaned of ice, dirt, rust scale, or other coatings.

b. Water shall be removed from place of deposit before concrete is placed. All laitance and other unsound material shall be removed from hardened concrete before additional concrete is added.

3B.4 CONVEYANCE. Concrete shall be conveyed from the mixer to the place of final deposit by methods that will prevent segregation or loss of materials. Equipment for chuting concrete shall be of such size and design so as to ensure a continuous flow of concrete at the delivery end without segregation of materials.

3B.5 PLACEMENT.

a. Concrete shall be placed within 1 1/2 hours after mixing begins. Concrete shall be deposited as nearly as practicable in its final position to avoid segregation due to rehandling or flowing. The placing of concrete shall be carried on at such rate that concrete is at all times plastic, and flows readily into the spaces between the bars. No concrete that has been contaminated by foreign material shall be used, nor shall retempered concrete be used.

b. When placing is started, it shall be carried on as a continuous operation until placement is completed.

c. Concrete shall be placed in layers not exceeding 18 inches deep, and vibrated in place. During and immediately after depositing, the concrete shall be consolidated by vibrators.

The concrete shall be thoroughly worked around reinforcement, 3B-2 around embedded fixtures, and into corners. Accumulations of water on the surface of the concrete due to water gain, segregation, or other causes, shall be prevented as much as possible by employing proper placement, consolidation, and finishing practices. Provisions shall be made to remove such water as may accumulate, so that under no conditions will concrete be placed in such accumulations.

d. Vibrators shall be the internal immersion type, operating at speeds of not less than 7,000 RPM. Vibrators shall be kept constantly moving in the concrete and shall be applied at points uniformly spaced not further apart than the radius over which the vibrator is visibly effective. The entire depth of a new layer of concrete shall be vibrated. The vibrators shall penetrate several inches into the layer below to insure thorough union of the layers. The vibrator shall not be held in one location long enough to draw a pool of grout from the surrounding concrete. Vibration shall be such that the concrete becomes uniformly plastic.

3B.6 FOOTINGS. All footings and foundations without footings shall bear on firm, undisturbed soil.

3B.7 ANCHOR BOLT INSERTS. No drilling for or placing of anchor bolt inserts or anchors will be permitted in concrete for a period of three days after placement, unless noted otherwise on the drawings.

3B.8 CURING.

a. Provision shall be made for maintaining concrete in a moist condition for a period of at least 5 days after placement.

b. In lieu of wet curing, one coat of a concrete curing sealer which forms a film over the concrete surface may be used for curing the concrete. The sealer shall meet the ASTM C-309 standard for moisture retention. The compound shall be a type that does not permanently discolor the concrete. Dayton Superior J11W is one of the products which meet this Specification. On exposed surfaces, application shall be made immediately after the concrete has been finished. If there is any delay, the concrete shall be kept moist until the application is made. After the forms are removed, the concrete shall be sprayed lightly with water, and then the coat of curing compound applied. If the forms (wood only) cannot be removed within 48 hours, they shall be wetted down and kept wet until their removal, and then the compound applied as above.

3B.9 COLD-WEATHER REQUIREMENTS.

a. Adequate equipment shall be provided for heating concrete materials and protecting concrete during freezing or near-freezing weather. No frozen materials or materials containing snow or ice shall be used. Concrete shall not be placed on frozen soil.

b. All reinforcement, forms, fillers, and ground which will make contact with concrete shall be free from snow and ice. Whenever the temperature of the surrounding air is below 40oF, all concrete placed in forms shall have a temperature of 45oF or

3B-3 higher, after placement. Adequate means shall be provided for maintaining this temperature for 4 days. Any additional time necessary to ensure proper curing of the concrete shall be provided as directed by the COR. The housing, covering, or other protection used in connection with curing, shall remain in place and intact at least 24 hours after the artificial heating is disconnected. Do not use salt or other chemicals to prevent freezing.

3B.10 HOT-WEATHER REQUIREMENTS.

a. In hot weather, suitable precautions shall be taken to avoid drying of the concrete prior to finishing operations. Use of windbreaks, sunshades, fog sprays, or other devices shall be provided as directed by the COR.

b. Concrete deposited in hot weather shall not have a placing temperature that will cause difficulty from loss of slump, flash set, or cold joints. Concrete temperature shall be less than 90oF.

3B.11 SLUMP. Concrete shall be tested for consistency at the mixer or at the place of deposit if delivered…