SOW QGV ARSR Radar Site Replace and Refurbish Asphalt Access Road Project.pdf

FEDERAL AVIATION ADMINISTRATION SCOPE OF WORK

REPLACE AND REFURBISH ASPHALT ACCESS ROAD

QGV ARSR Radar Site

Project Location:

Lat./Long. 33°59'25.00"N, 77°55'4.00"W

Fort Fisher, NC 28449

1. STATEMENT OF WORK

The asphalt access road known as Davis Road leading to the QGV ARSR Radar site has deteriorated significantly, showing uneven areas, areas with ‘alligator’ cracking, and other areas with damaged asphalt. There are areas where the asphalt along with base material are damaged or missing and will require replacement & repairs. The contractor shall furnish necessary equipment, materials, labor and supervision to perform the following work along an approximate 2,000-foot section of the Davis Road from the beginning of the secondary access road from the QGV ARSR radar site to the intersection of Marquesa Way (refer to Figures 1 to 4). The radar site is a Federal Aviation Administration (FAA) facility located at coordinates 33°59'25.00"N, 77°55'4.00"W, in Fort Fisher, NC. (Figure 1). The asphalt road area is approximately 2,000’L x 16’W = 32,000 ft2. The Davis Road access point to the radar site is secure with a swing gate and access to the radar site is secure along with being active 24 hours, 7 days a week. Work may require an escort. The work will impact the use of the road along with disruption of use & temporarily restricting access to some sections of the road. This requires a plan be developed, with a schedule for the work activities and must be coordinated with the FAA’s on-site representative. Areas to be closed must be coordinated with the on-site representative, to ensure adequate vehicular access for facility personnel. Supplemental information is in the attached Appendix, included are aerial photographs, site photographs, reference drawings/details and asphalt paving specification 32 12 16.

1. Contractor shall provide a plan including a site map indicating in stages which areas work will be performed, including specific days, and the duration the areas will be closed. This shall be coordinated before the project begins and shall be reviewed/approved by the facility management (Submittal Required). The contractor shall adhere to all federal, state and local regulations and codes. The contractor shall conduct a utility clearance to ensure no utilities are impacted. The contractor may have to implement Sediment & Erosion Control measures such as the installation of silt fencing.

2. The contractor shall mill or saw cut, remove and replace the existing asphalt access road (Davis Rd.) down to the base. It encompasses the area that includes the asphalt access drive from Davis Road to the facility’s entrance drive. It is an approximate 2,000-foot section of the Davis Road from the beginning of the secondary access road from the QGV ARSR radar site to the intersection of Marquesa Way (refer to Figures 1 to 5). For supplemental construction information or requirements refer to attached aerial photographs, and drawings, along with the associated construction details and notes related to the work to be performed. The new asphalt to be installed shall be a minimum 4” thick (compacted) contractor shall field verify conditions, dimension and quantities. The existing conditions or asphalt thickness may require the contractor to excavate some base material in order to ensure final elevation matches the existing ground surface and ensure minimum 2% slope. Any discrepancies that may impact the work to be performed shall reported to the FAA upon discovery, in writing. Care shall be taken to minimize damage to the existing features not to be repaired or replaced. The contractor shall coordinate with the FAA while working at or adjacent to the FAA’s security gate and shall minimized the time the gate is inoperable. At no time shall the FAA not have access to the facility, temporary closures may be permitted but must be coordinated and approved with the FAA’s on-site representative.

3. Removed asphalt shall be transported from site and taken to an asphalt recycler or properly disposed of in accordance with federal, state and local regulations (Submittal Required).

4. Compact existing base material exposed using a heavy vibratory roller.

5. Fill and level low spots and in any excavated areas below the existing asphalt layer. Fill added, similar to existing, shall be placed in no greater than 6” layers, and compacted with a heavy vibratory roller. Fill material and compaction shall meet the NCDOT and local requirements (Submittal Required).

6. Provide and install a minimum 6” layer of base course gravel over the entire area excavated and in areas requiring repairs. Fill material and compaction shall meet the NCDOT and local requirements. (Submittal Required)

7. Compact the gravel base by making multiple passes with a heavy-duty vibratory roller.

8. Contractor shall provide a shop drawing, detail or sketch that identifies specific layers, types and thickness of fill along with NCDOT approved HMA asphalt courses (Submittal Required).

9. Immediately before placing asphalt materials (minimum surface temperature of 60 deg F), remove loose and deleterious material from substrate surfaces. Ensure that prepared area, subbase and/or base is ready to receive paving.

(a) Sweep loose granular particles from surface of unbound-aggregate base course. Do not dislodge or disturb aggregate embedded in compacted surface of base course.

(b) Tack/Prime Coat: Apply a NCDOT approved product at a uniform rate over surface as specified by the manufacturer and in accordance with NCDOT requirements. Allow to cure per the manufacture’s recommendations. (Submittal Required)

10. Contractor shall submit documentation for the NCDOT approved asphalt mix and supplied from a local distributor in the area regularly engaged in NCDOT highway work. This submittal shall be submitted and approved prior to the start of the project. (Submittal Required)

11. Provide and install a 2” (after compaction) NCDOT approved Asphalt Base Course of hot-mix asphalt.

Minimum surface temperature must be monitored.

12. Provide and install a 2” (after compaction) NCDOT approved Asphalt Surface Course hot-mix asphalt.

Minimum surface temperature must be monitored.

13. Slope or taper to ensure appropriate measures are taken to such that water flows freely to the drop inlets, to the curb & gutters or to the appropriate drainage structures/areas and away from the builds or structures.

No ponding (standing water) will be allowed or accepted on any newly completed work.

14. Joints

a. Construct joints to ensure a continuous bond between adjoining paving sections. Construct joints free of depressions, with same texture and smoothness as other sections of hot-mix asphalt course.

b. Clean contact surfaces and apply tack coat to joints.

c. Offset longitudinal joints, in successive courses, a minimum of 6 inches Offset transverse joints, in successive courses, a minimum of 24 inches.

d. Construct transverse joints at each point where paver ends a day's work and resumes work at a subsequent time. Construct these joints using either "bulkhead" or "papered" method according to AI MS-22, for both "Ending a Lane" and "Resumption of Paving Operations."

15. Field Quality Control:

(a) The contractor shall engage a qualified 3rd party testing agency to perform tests and inspections. The contractor shall submit the firm’s qualifications for FAA review and approval.

(b) Thickness: In-place compacted thickness of hot-mix asphalt courses will be determined according to

ASTM D 3549.

(c) Surface Smoothness: Finished surface of each hot-mix asphalt course will be tested for compliance with smoothness tolerances.

(d) In-Place Density: Testing agency will take samples of uncompacted paving mixtures and compacted pavement according to ASTM D 979 or AASHTO T 168

1. Reference maximum theoretical density will be determined by averaging results from four samples of hot-mix asphalt-paving mixture delivered daily to site, prepared according to ASTM D 2041, and compacted according to job-mix specifications.

2. In-place density of compacted pavement will be determined by testing core samples according to ASTM D 1188 or ASTM D 2726.

a. One core sample will be taken for every 1000 sq. yd. or less of installed pavement, with no fewer than three cores taken.

b. Field density of in-place compacted pavement may also be determined by nuclear method according to ASTM D 2950 and correlated with ASTM D 1188 or ASTM D

(e) Replace and compact hot-mix asphalt where core tests were taken.

(f) Remove and replace or install additional hot-mix asphalt where test results or measurements indicate that it does not comply with specified requirements.

(g) Reporting: Contractor shall provide copies of all materials manifests or tickets from the truck when on-site deliveries are made, such as quarry and batch plant tickets (include quantities, temperatures and delivery times). Contractor shall provide weekly a summary of daily field activities that includes copies of field test reports and a site sketch indicating the test number & location. Test failures shall be reported immediately upon discovery and a written resolution within 24 hours.

16. Submittals required include, but are not necessarily limited to, the following:

(a) Contractor Safety Plan

(b) Asphalt & Material Disposal

(c) Prime & Tack Coat Products

(d) Asphalt Mix Design

(e) Work Schedule and Work Plan

(f) Aggregate and Fill Material

(g) Shop Drawings, Details or Sketches of Asphalt Profile

(h) Drive & Parking Lot Striping Paint

(i) Product SDS Sheets

17. Contractor to field verify conditions, dimensions and quantities. Any discrepancies or concerns should be addressed immediately with the FAA and followed up in writing to the CO and COR.

18. Use of the FAA’s facilities are restricted, the contractor shall provide portable restroom for the work force.

19. Substitutes/Alternates are subject to compliance with all requirements, “or equal” must be compatible for application to the existing system. Any substitutes or alternates must be submitted for the FAA’s written approval.

20. At least fifteen (15) calendar days prior to the start of onsite activities, following contract award, the contractor shall submit the schedule and work plan. Work will not commence until the required submittals are submitted and approved.

• Project shall not proceed when the ambient temperature is less than 50 degrees F and rising and the pavement temperature is less than 40 degrees F and rising. Also, not during inclement weather conditions such as precipitation and/or temperature.

The General Contractor (GC) shall be expected to work Monday through Friday during the daytime hours of 0700 AM to 0330 PM unless alternatively coordinated in advance with the Contracting Officer Representative (COR).

There may be some activities that will require the work to be performed after the hours, dependent on the plan and schedule established by the contractor. Coordination between the GC and FAA personnel shall be required at all times in order to maintain an operational facility.

Contractor shall field verify conditions, dimension and quantities. Any discrepancies that may impact the work to be performed shall reported to the FAA upon discovery, in writing. Care shall be taken to minimize damage to the existing features not to be repaired or replaced.

Any discrepancies between the contract provisions and the actual site conditions shall be referred to the Contracting Officer (CO) for a written determination in accordance with Contract Clause entitled Order of Precedence.

2. SPECIAL REQUIREMENTS

1. Safety Data Sheets. – Prior to the start of work, the contractor shall submit Safety Data Sheets (SDS) with all submittals for review and approval by the Contracting Officer. Materials found to contain asbestos and/or lead-based products will not be accepted. Copies of all SDS sheets shall be provided to the facility FAA personnel for the building records. The contractor shall comply with all health and safety provisions outlined in each SDS and shall follow all OSHA guidelines regarding personnel protection.

2. Product Data - Prior to commencing any work, the contractor shall submit Product Data Sheets for review and approval by the Contracting Officer (CO).

3. Hazardous materials. - If the FAA COR or field representative suspects the presence of asbestos or lead-based products in the new materials, the FAA will sample the suspect material to verify that no asbestos containing material or lead-based material were used. If these materials are found to contain asbestos or lead-based products, the cost of the survey and all subsequent removal/replacement of any hazardous materials shall be at the contractors’ expense.

4. Due to the recent health concerns related to the COVID pandemic, the Contractor shall adhere to the Center of Disease Control’s (CDC’s) and the FAA’s COVID requirements and guidelines. The FAA’s COVID requirements and guidelines are available upon request.

5. Work plan and scheduling. – Prior to the Contracting Officer issuing the Notice To Proceed (NTP), the contractor shall submit for approval a work plan with a schedule of the work.

3. SITE ACCESS/CONSTRUCTION LIMITS

1. Contractor shall maintain access to the site at all times.

2. Construction/demolition shall in no way interfere with FAA Operations. Extreme care shall be exercised so as not to cause any interference or interruption of service from this facility. It is absolutely mandatory that the contractor protects FAA personnel and existing FAA communication, electrical and mechanical equipment both inside and outside buildings from damage caused by impact, water, debris, dust or odor. The contractor shall have the overall responsibility for the performance and enforcement of all forms of protection around or near the facility and protect against any damages due to work performed under this contract. Any damages incurred, as a result of construction activity during the performance of this contract will be repaired/replaced immediately by the contractor at no cost to the FAA.

3. The contractor shall confine operations, activities, storage of materials and employee parking within the designated areas, as identified by the COR. If required, Additional space the contractor deems necessary shall be obtained off site, at no additional cost to the Government.

4. Vehicles transporting materials shall not be loaded beyond the capacity prescribed by federal, state, or local laws. Obstruction of existing roadways, driveways, to the facility is strictly prohibited.

5. Damage to existing paving, lawns, and utilities caused by the contractor's activities shall be repaired immediately. Any damages that are a result of the contractor’s activities shall be repaired. All costs of repairs shall be paid by the contractor. After notice to proceed and prior to the commencement of construction, the contractor and COR shall conduct joint inspections of the existing areas affected by the construction. Existing damage or defects shall be noted and will be used as the basis for determination of damages caused by the contractor's operations.

6. It is strongly urged that the contractor carefully examine the premises to determine the extent of work and the conditions under which it must be done.

7. The Government reserves the right to enter the construction area at any time for work inspection and for the operation of the facility.

8. All work hours, shifts, and overtime work shall be coordinated with the COR. Before commencing construction, furnish to the COR a statement of hours per day and days per week to normally be worked and approximate number of persons on the job for a normal work shift.

At the end of each workday, the contractor shall secure all construction areas. The contractor is responsible for the security of the staging area and shall provide the required measures at no additional expense to the government.

4. PERSONNEL

Contracting Officer -The term "Contracting Officer" (CO) as used herein denotes the person designated to act on behalf of the Government in the performance of this contract. Where reference is made to "Federal Aviation Administration" (FAA), "Contracting Officer's Representative" (COR), or the like, this shall mean the Contracting Officer or his/her authorized representative.

Contractor Superintendence - In accordance with Contract Clause entitled SUPERINTENDENCE BY THE CONTRACTOR, the Contractor shall at all times during performance of this contract and until the work is completed and accepted, directly superintend the work or assign and have on site a competent superintendent with the authority to act for the Contractor.

The contractor and his employees shall be subject to all rules and regulations relative to entering and leaving the FAA facility.

5. COORDINATION

The contractor shall coordinate all work which has any or may have any impact on any operational system through the COR. The contractor shall immediately cease any work which is adversely impacting the operation of the FAA facility and shall be responsible for the immediate repair or restoration of any portion of the operational system that has been damaged or suffered diminished performance as a result of the contractor's activities. No repairs shall be completed without notification of the COR. In some cases, the repairs may be performed by FAA personnel at the contractor’s expense, due to the criticality of the repair.

The Contractor will be responsible for obtaining and payment of all building fees, inspection fees, utility connection charges and any other fees or charges which may be incurred in the performance of this contract. The contractor shall comply with all local city, county, and state construction codes.

All materials or workmanship or both which have been rejected by the COR by reasons of failure to conform with the requirements of the Contract Documents shall be removed and replaced with new, acceptable materials by the contractor at the contractor's own expense. Contractor shall also pay for testing of new materials which have been installed in place of rejected materials.

6. CONSTRUCTION SCHEDULE

The work plan and schedule prepared by the contractor shall consist of a logical narrative plan. Include construction activities, submittal and approval of materials, samples and shop drawings (if applicable), the procurement of critical materials and equipment, fabrication of special materials and equipment along with their installation and testing.

At least fifteen (15) calendar days prior to the start of onsite activities, following contract award, the contractor shall submit the schedule and work plan. Work will not commence until the schedule is approved.

The Contractor shall participate in a review and evaluation of the proposed schedule with the Contracting Officer’s Representative (COR). Any revisions necessary as a result of the review shall be re-submitted for approval. The approved schedule shall then be used by the contractor for planning, organizing, and directing work, reporting progress, and requesting payment for work accomplished. If the contractor, thereafter, desires to make changes in the schedule, the Contracting Officer shall be notified in writing, stating the reasons for the change. If the Contracting Officer considers the change to be of a major nature, the contractor may be required to revise the schedule and submit it for approval, without additional cost to the government.

7. SAFETY REQUIREMENTS

Contractor Responsibility

1. General Safety Provisions - The Contractor shall bear full responsibility to provide safe working conditions for its employees and Contractors. The Contractor shall not permit any employee or Subcontractor to work in surroundings or under working conditions that are unsanitary, hazardous, or dangerous to the health and safety of the employee.

2. Accident Prevention - The Contractor shall bear the responsibility of maintaining an accident prevention program such that frequent and regular inspections of the job site, materials and equipment are made by a competent person designated by the employer.

3. Use of Equipment - The Contractor shall not permit the use of any machinery, tool, material, or equipment that is not in compliance with OSHA regulations. The employer shall permit only those employees qualified by training and/or experience to operate equipment and machinery.

4. The FAA shall not be held responsible for safety inspections to ensure Contractor conformance with the OSHA safety regulations. The FAA, however, reserves the right to notify the Contractor of any deficiencies regarding worker safety.

5. The FAA will evaluate the Contractor on its safety performance, including that of its Subcontractors. The number and severity of safety and security violations will be considered in this evaluation. Contractor safety violations are cause for termination for default, may result in notification of the Contractor’s bonding company, and will affect the Contractor’s opportunity to propose on future work. Failure to correct such deficiencies may impact the Contractor’s ability to work on future FAA contracts.

OSHA Regulations

The Contractor shall comply with the latest Occupational Safety and Health Administration regulations (CFR 29 Part 1926) regarding safety in the work area.

The Contractor shall be responsible for obtaining copies of non-FAA referenced documents without additional cost to the FAA. If Contractor requests a copy of FAA directives, they may be obtained by contacting the Contracting Officer.

The Contractor is not relieved from adhering to other OSHA requirements not listed herein. The Contractor shall consult the latest referenced OSHA documents for safety regulations.

OSHA Documents:

CFR 29 Part 1926 Safety and Health Regulations for Construction

CFR 29 Part 1910 General Industry Standards Applicable to Construction Industry FAA Documents:

FAA Order 3900.49 Control of Hazardous Energy During Maintenance, Servicing and Repair

8. CLEAN-UP

The contractor shall correct or repair any damage done during any part of this contract. Scrap and debris resulting from the project shall be removed from the site after each day’s work on site. All debris and generated waste shall require disposal in a manner that is not in conflict with local sanitary regulations.

9. CONTACT/LOCATION INFORMATION

A. Location of Work:

QGV ARSR Radar Site Project Location:

Lat./Long. 33°59'25.00"N, 77°55'4.00"W Fort Fisher, NC 28449

B. FAA Point of Contact:

Name: TBA Address:

City, ST Zip:

Phone Number:

10. ACCEPTANCE OF WORK

The FAA COR will conduct a Construction Acceptance Inspection (CAI) at the completion of the project to ensure that all items of the contract have been fulfilled and that the site has been cleaned of debris.

APPENDIX

Figure 1 - Aerial Photograph of General Area of QGV ARSR Radar Site

Figure 2 - Aerial Photograph of The Proposed Work Area Along Davis Road Which Leads To The QGV ARSR Radar Site

Figure 3 – Intersection Of Davis Rd & Marquesa Way (One End Of The Proposed Work)

Figure 4 Intersection Of Davis Rd & The Access Rd To The Radar Site (The Other End Of The Proposed Work)

Figure 5 – Typical Road Cross Section

Figure 6 – Drawing so-d-101803-c06

QGV ARSR RADAR SITE

REPLACE AND REPAIR DAVIS ROAD April 2022

FT. FISHER, NORTH CAROLINA SPECIFICATION 32 12 16 ASPHALT PAVING

SPECIFICATION SECTION 32 12 16 - ASPHALT PAVING

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Hot-mix asphalt patching.

2. Hot-mix asphalt paving.

3. Hot-mix asphalt overlay.

1.2 PREINSTALLATION MEETINGS

A. Preinstallation Conference: Conduct conference at Project site.

1. Review methods and procedures related to hot-mix asphalt paving including, but not limited to, the following:

a. Review proposed sources of paving materials, including capabilities and location of plant that will manufacture hot-mix asphalt.

b. Review requirements for protecting paving work, including restriction of traffic during installation period and for remainder of construction period.

1.3 ACTION SUBMITTALS

A. Product Data: For each type of product.

1. Include technical data and tested physical and performance properties.

2. Hot-Mix Designs: Certification by North Carolina Department of Transportation of approval of each hot mix proposed for the Work.

B. Sustainable Design Submittals:

1.4 INFORMATIONAL SUBMITTALS

A. Qualification Data: For manufacturer and testing agency.

B. Material Certificates: For each paving material. Include statement that mixes containing recycled materials will perform equal to mixes produced from all new materials.

C. Material Test Reports: For each paving material, by a qualified testing agency.

D. Field quality-control reports.

1.5 QUALITY ASSURANCE

A. Manufacturer Qualifications: A paving-mix manufacturer registered with and approved by authorities having jurisdiction or the DOT of state in which Project is located.

B. Testing Agency Qualifications: Qualified according to ASTM D 3666 for testing indicated.

C. Regulatory Requirements: Comply with materials, workmanship, and other applicable requirements of North Carolina Department of Transportation for asphalt paving work. State of North Carolina, Department of Transportation (NCDOT) – Construction Specifications for NCDOT Projects along with NC QMS Asphalt Manual.

1. Measurement and payment provisions and safety program submittals included in standard specifications do not apply to this Section.

1.6 FIELD CONDITIONS

A. Environmental Limitations: Do not apply asphalt materials if subgrade is wet or excessively damp, if rain is imminent or expected before time required for adequate cure, or if the following conditions are not met:

1. Prime Coat: Minimum surface temperature of 60 deg F.

2. Tack Coat: Minimum surface temperature of 60 deg F.

3. Asphalt Base Course: Minimum surface temperature of 40 deg F and rising at time of placement.

4. Asphalt Surface Course: Minimum surface temperature of 60 deg F at time of placement.

PART 2 - PRODUCTS

2.1 AGGREGATES

A. General: Use materials and gradations that have performed satisfactorily in previous installations and meet NCDOT standards.

B. Coarse Aggregate: ASTM D692/D692M, sound; angular crushed stone, crushed gravel, or cured, crushed blast-furnace slag and meet NCDOT specifications.

C. Fine Aggregate: ASTM D1073, sharp-edged natural sand or sand prepared from stone, gravel, cured blast-furnace slag, or combinations thereof and conform to NCDOT specification.

D. Mineral Filler: Rock or slag dust, hydraulic cement, or other inert material shall meet NCDOT specifications.

2.2 ASPHALT MATERIALS

A. Asphalt Binder: AASHTO M 320, and requirements set forth in NCDOT Construction and Material Specifications.

B. Cutback Prime Coat: AASHTO M-82, medium-curing cutback asphalt, RC-70 or RC-250, in accordance with NCDOT Specifications.

C. Consult state or local NCDOT for recommended asphalt-emulsion prime coat for local conditions.

D. Emulsified Asphalt Prime Coat: AASHTO M 140 emulsified asphalt or AASHTO M 208 cationic emulsified asphalt, slow setting, diluted in water, of suitable grade and consistency for application, in accordance with curing materials specified in NCDOT Construction and Material Specifications.

E. Tack Coat: AASHTO M 140 emulsified asphalt or AASHTO M 208 cationic emulsified asphalt, slow setting, diluted in water, of suitable grade and consistency for application, in accordance with NCDOT Construction and Material Specifications.

2.3 AUXILIARY MATERIALS

A. Herbicide: Commercial chemical for weed control, registered by the EPA, and not classified as "restricted use" for locations and conditions of application. Provide in granular, liquid, or wettable powder form.

B. Sand: ASTM D 1073 or AASHTO M 29, Grade No. 2 or No. 3.

C. Joint Sealant: ASTM D 6690 or AASHTO M 324, Type I, hot-applied, single-component, polymer-modified bituminous sealant.

2.4 MIXES

A. Recycled Content of Hot-Mix Asphalt: Postconsumer recycled content plus one-half of preconsumer recycled content not less than 10 percent or more than 15 percent by weight.

1. Surface Course Limit: Recycled content no more than 10 percent by weight.

B. Hot-Mix Asphalt: Dense-graded, hot-laid, hot-mix asphalt plant mixes approved by NCDOT and complying with the following requirements:

1. Provide mixes with a history of satisfactory performance in geographical area where Project is located.

2. Provide mixes in accordance with the NCDOT Construction and Material Specifications.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Verify that subgrade is dry and in suitable condition to begin paving.

B. Proof-roll subgrade below pavements with heavy pneumatic-tired equipment to identify soft pockets and areas of excess yielding. Do not proof-roll wet or saturated subgrades.

1. Completely proof-roll subgrade in one direction. Limit vehicle speed to 3 mph.

2. Proof roll with a loaded 10-wheel, tandem-axle dump truck weighing not less than 15 tons.

3. Excavate soft spots, unsatisfactory soils, and areas of excessive pumping or rutting, as determined by COR, and replace with compacted backfill or fill as directed.

C. Proceed with paving only after unsatisfactory conditions have been corrected.

3.2 COLD MILLING

A. Clean existing pavement surface of loose and deleterious material immediately before cold milling. Remove existing asphalt pavement by cold milling to grades and cross sections indicated.

1. Mill to a depth indicated or required.

2. Mill to a uniform finished surface free of excessive gouges, grooves, and ridges.

3. Control rate of milling to prevent tearing of existing asphalt course.

4. Repair or replace curbs, manholes, and other construction damaged during cold milling.

5. Excavate and trim unbound-aggregate base course, if encountered, and keep material separate from milled hot-mix asphalt.

6. Patch surface depressions deeper than 1 inch after milling, before wearing course is laid.

7. Handle milled asphalt material according to disposal methods approved by COR.

8. Keep milled pavement surface free of loose material and dust.

9. Do not allow milled materials to accumulate on-site.

3.3 PATCHING

A. Asphalt Pavement: Saw cut perimeter of patch and excavate existing pavement section to sound base. Excavate rectangular or trapezoidal patches, extending 12 inches into perimeter of adjacent sound pavement, unless otherwise indicated. Cut excavation faces vertically. Remove excavated material. Recompact existing unbound-aggregate base course to form new subgrade.

B. Portland Cement Concrete Pavement: Break cracked slabs and roll as required to reseat concrete pieces firmly.

1. Remove disintegrated or badly cracked pavement. Excavate rectangular or trapezoidal patches, extending into perimeter of adjacent sound pavement, unless otherwise indicated. Cut excavation faces vertically.

Recompact existing unbound-aggregate base course to form new subgrade.

C. Tack Coat: Before placing patch material, apply tack coat uniformly to vertical asphalt surfaces abutting the patch. Apply at a rate of 0.05 to 0.15 gal./sq. yd..

1. Allow tack coat to cure undisturbed before applying hot-mix asphalt paving.

2. Avoid smearing or staining adjoining surfaces, appurtenances, and surroundings. Remove spillages and clean affected surfaces.

D. Placing Patch Material: Fill excavated pavement areas with hot-mix asphalt base mix for full thickness of patch and, while still hot, compact flush with adjacent surface.

E. Placing Patch Material: Partially fill excavated pavements with hot-mix asphalt base mix and, while still hot, compact. Cover asphalt base course with compacted, hot-mix surface layer finished flush with adjacent surfaces.

3.4 REPAIRS

A. Leveling Course: Install and compact leveling course consisting of hot-mix asphalt surface course to level sags and fill depressions deeper than 1 inch in existing pavements.

1. Install leveling wedges in compacted lifts not exceeding 3 inches thick.

B. Crack and Joint Filling: Remove existing joint filler material from cracks or joints to a depth of 1/4 inch.

1. Clean cracks and joints in existing hot-mix asphalt pavement.

2. Use emulsified-asphalt slurry to seal cracks and joints less than 1/4 inch wide. Fill flush with surface of existing pavement and remove excess.

3. Use hot-applied joint sealant to seal cracks and joints more than 1/4 inch wide. Fill flush with surface of existing pavement and remove excess.

3.5 SURFACE PREPARATION

A. General: Immediately before placing asphalt materials, remove loose and deleterious material from substrate surfaces. Ensure that prepared subgrade is ready to receive paving.

B. Herbicide Treatment: Apply herbicide according to manufacturer's recommended rates and written application instructions. Apply to dry, prepared subgrade or surface of compacted-aggregate base before applying paving materials.

1. Mix herbicide with prime coat if formulated by manufacturer for that purpose.

C. Cutback Prime Coat: Apply uniformly over surface of compacted unbound-aggregate base course at a rate of 0.15 to 0.50 gal./sq. yd.. Apply enough material to penetrate and seal, but not flood, surface. Allow prime coat to cure.

1. If prime coat is not entirely absorbed within 24 hours after application, spread sand over surface to blot excess asphalt. Use enough sand to prevent pickup under traffic. Remove loose sand by sweeping before pavement is placed and after volatiles have evaporated.

2. Protect primed substrate from damage until ready to receive paving.

D. Emulsified Asphalt Prime Coat: Apply uniformly over surface of compacted unbound-aggregate base course at a rate of 0.10 to 0.30 gal./sq. yd. per inch depth. Apply enough material to penetrate and seal, but not flood, surface.

Allow prime coat to cure.

1. If prime coat is not entirely absorbed within 24 hours after application, spread sand over surface to blot excess asphalt. Use enough sand to prevent pickup under traffic. Remove loose sand by sweeping before pavement is placed and after volatiles have evaporated.

2. Protect primed substrate from damage until ready to receive paving.

E. Tack Coat: Apply uniformly to surfaces of existing pavement at a rate of 0.05 to 0.15 gal./sq. yd..

1. Allow tack coat to cure undisturbed before applying hot-mix asphalt paving.

2. Avoid smearing or staining adjoining surfaces, appurtenances, and surroundings. Remove spillages and clean affected surfaces.

3.6 PLACING HOT-MIX ASPHALT

A. Machine place hot-mix asphalt on prepared surface, spread uniformly, and strike off. Place asphalt mix by hand in areas inaccessible to equipment in a manner that prevents segregation of mix. Place each course to required grade, cross section, and thickness when compacted.

1. Place hot-mix asphalt base course in number of lifts and thicknesses indicated.

2. Place hot-mix asphalt surface course in single lift.

3. Spread mix at a minimum temperature of 250 deg F.

4. Begin applying mix along centerline of crown for crowned sections and on high side of one-way slopes unless otherwise indicated.

5. Regulate paver machine speed to obtain smooth, continuous surface free of pulls and tears in asphalt-paving mat.

B. Place paving in consecutive strips not less than 10 feet wide unless infill edge strips of a lesser width are required.

1. After first strip has been placed and rolled, place succeeding strips and extend rolling to overlap previous strips. Overlap mix placement about 1 to 1-1/2 inches from strip to strip to ensure proper compaction of mix along longitudinal joints.

2. Complete a section of asphalt base course before placing asphalt surface course.

C. Promptly correct surface irregularities in paving course behind paver. Use suitable hand tools to remove excess material forming high spots. Fill depressions with hot-mix asphalt to prevent segregation of mix; use suitable hand tools to smooth surface.

3.7 JOINTS

A. Construct joints to ensure a continuous bond between adjoining paving sections. Construct joints free of depressions, with same texture and smoothness as other sections of hot-mix asphalt course.

1. Clean contact surfaces and apply tack coat to joints.

2. Offset longitudinal joints, in successive courses, a minimum of 6 inches.

3. Offset transverse joints, in successive courses, a minimum of 24 inches.

4. Construct transverse joints at each point where paver ends a day's work and resumes work at a subsequent time. Construct these joints using either "bulkhead" or "papered" method according to AI MS-22, for both "Ending a Lane" and "Resumption of Paving Operations."

5. Compact joints as soon as hot-mix asphalt will bear roller weight without excessive displacement.

6. Compact asphalt at joints to a density within 2 percent of specified course density.

3.8 COMPACTION

A. General: Begin compaction as soon as placed hot-mix paving will bear roller weight without excessive displacement. Compact hot-mix paving with hot, hand tampers or with vibratory-plate compactors in areas inaccessible to rollers.

1. Complete compaction before mix temperature cools to 185 deg F.

B. Breakdown Rolling: Complete breakdown or initial rolling immediately after rolling joints and outside edge.

Examine surface immediately after breakdown rolling for indicated crown, grade, and smoothness. Correct laydown and rolling operations to comply with requirements.

C. Intermediate Rolling: Begin intermediate rolling immediately after breakdown rolling while hot-mix asphalt is still hot enough to achieve specified density. Continue rolling until hot-mix asphalt course has been uniformly compacted to the following density:

1. Average Density: 96 percent of reference laboratory density according to ASTM D 6927 or AASHTO T 245, but not less than 94 percent or greater than 100 percent.

2. Average Density: 92 percent of reference maximum theoretical density according to ASTM D 2041, but not less than 90 percent or greater than 96 percent.

D. Finish Rolling: Finish roll paved surfaces to remove roller marks while hot-mix asphalt is still warm.

E. Edge Shaping: While surface is being compacted and finished, trim edges of pavement to proper alignment.

Bevel edges while asphalt is still hot; compact thoroughly.

F. Repairs: Remove paved areas that are defective or contaminated with foreign materials and replace with fresh, hot-mix asphalt. Compact by rolling to specified density and surface smoothness.

G. Protection: After final rolling, do not permit vehicular traffic on pavement until it has cooled and hardened.

H. Erect barricades to protect paving from traffic until mixture has cooled enough not to become marked.

3.9 INSTALLATION TOLERANCES

A. Pavement Thickness: Compact each course to produce the thickness indicated within the following tolerances:

1. Base Course: Plus or minus 1/2 inch.

2. Surface Course: Plus 1/4 inch, no minus.

B. Pavement Surface Smoothness: Compact each course to produce a surface smoothness within the following tolerances as determined by using a 10-foot straightedge applied transversely or longitudinally to paved areas:

1. Base Course: 1/4 inch.

2. Surface Course: 1/8 inch.

3. Crowned Surfaces: Test with crowned template centered and at right angle to crown. Maximum allowable variance from template is 1/4 inch.

3.10 FIELD QUALITY CONTROL

A. Testing Agency: Engage a qualified testing agency to perform tests and inspections.

B. Thickness: In-place compacted thickness of hot-mix asphalt courses will be determined according to

ASTM D 3549.

C. Surface Smoothness: Finished surface of each hot-mix asphalt course will be tested for compliance with smoothness tolerances.

D. In-Place Density: Testing agency will take samples of uncompacted paving mixtures and compacted pavement according to ASTM D 979 or AASHTO T 168.

1. Reference maximum theoretical density will be determined by averaging results from four samples of hot-mix asphalt-paving mixture delivered daily to site, prepared according to ASTM D 2041, and compacted according to job-mix specifications.

2. In-place density of compacted pavement will be determined by testing core samples according to ASTM D 1188 or ASTM D 2726.

a. One core sample will be taken for every 1000 sq. yd. or less of installed pavement, with no fewer than three cores taken.

b. Field density of in-place compacted pavement may also be determined by nuclear method according to ASTM D 2950 and correlated with ASTM D 1188 or ASTM D 2726.

E. Replace and compact hot-mix asphalt where core tests were taken.

F. Remove and replace or install additional hot-mix asphalt where test results or measurements indicate that it does not comply with specified requirements.

3.11 WASTE HANDLING

A. General: Handle asphalt-paving waste in accordance with approved waste management plan, federal, state and local regulations.

END OF SECTION 32 12 16

B. Sustainable Design Submittals:

C. Proceed with paving only after unsatisfactory conditions have been corrected.