A04_Statement_of_Work.pdf

SCOPE OF WORK

PAVEMENT PRESERVATION

SHENANDOAH NATIONAL PARK

PMIS 328114A – Patch 1,200 SF of Skyline Drive

Table of Contents Acronyms

1. Project Introduction

1.1 Location and Facilities

1.2 Short Project Description

1.3 NPS Points of Contact

1.4 Pre-bid Site Conference

1.5 Schedule for Construction

2. General Requirements

2.1 Project Scope

2.2 Progress Payments

2.3 Project Meetings

3. Construction Requirements

3.1 Construction Support

3.2 Access And Work Zones

3.3 Working Hour Restrictions

3.4 Environmental and Sustainability Requirements for Construction

3.5 Quality Control

3.6 Temporary Materials, Equipment and Services

3.7 Work Limits

3.8 Maintaining Existing Utilities

3.9 Hauling Restrictions

3.10 Accident Prevention

3.11 Housekeeping

3.12 Project Close-out

4. Project Description and Technical Requirements

4.1 Existing Conditions

4.2 Detailed Project Description

4.3 Project Criteria and Performance Requirements……

4.4 Project Technical Requirements

5. Deliverables and Submittals

5.1 Construction Schedule

5.2 Schedule of Values

5.3 Design and Construction Documents

5.4 Technical Specifications and Submittals

5.5 Quality Control Submittals

5.6 Project Close-Out Submittals

Acronyms

CO Contracting Officer

COR Contracting Officer’s Representative

CQC Contractor Quality Control

FONSI Finding of No Significant Impact

NPS National Park Service

NCR Natural and Cultural Resources

PM Project Manager

PMIS Project Management Information System

1. Project Introduction

Project Name: Pavement Preservation and Patching Within Shenandoah National Park

Project Number: PMIS 328114

Park Name and Address:

Shenandoah National Park

3655 U.S. Highway 211 East Luray, VA 22835

Phone:

(540) 999-3500 ext 3252

1.1 Location and Facilities

This project is located at mile post 32.1 (Mary’s Rock Tunnel) along Skyline Drive in Shenandoah National Park, VA.

Staging areas may be utilized near project sites. Mary’s Rock Parking area or 25% of The Tunnel Overlook.

1.2 Short Project Description

This project will provide a full depth patch repair of approximately 1,200 Square Feet utilizing hot mix asphalt and according to VDOT and ASSHTO standards. Asphalt mixes shall follow VDOT specs for pavement patching.

Section 5 provides detailed information on the project description, existing conditions, and technical requirements.

1.3 NPS Points of Contact

Contract Specialist – Melvin Gartrell

Contracting Officer – Cole Johnson

Technical – Project Manager (PM) / on-site – Contracting Officer’s Representative (COR):

Russell Griswold

Russell_griswold@nps.gov

Office Phone: 540-999-3500 ext 3776

1.4 Pre-bid Site Conference

A Pre-bid Site Conference will be scheduled within ten (10) days of the distribution of this solicitation.

Interested bidders, i.e. contractors, subcontractors, etc. are encouraged to attend. The existing conditions may be observed and NPS staff will be available to answer questions.

1.5 Schedule for Construction

The Contractor has ten (10) calendar days after award to provide Performance and Payment Bonds.

Once Performance and Payment bonds are approved the Notice to Proceed for construction will be issued. Upon award, the Contractor shall determine and provide a schedule for completion of the construction milestones listed in Section 6. The performance period for construction shall be ninety (90) days from the date of Notice to Proceed to substantial completion of the improvements.

2. General Requirements

This Section briefly describes components of the project and outlines progress payments and required project meetings.

2.1 Project Scope

The project includes, but is not limited to the following (see section 5.2 for Detailed Project Description):

For section to receive Full Depth Patch:

1. Saw cutting of asphalt concrete pavement along repair limits – no hand held saw cuts will be acceptable.

2. Removal of asphalt concrete pavement within the defined repair limits.

3. Placement and compaction of aggregate base course on prepared subgrade to VDOT standard.

4. Placement and compaction of hot asphalt concrete for roadways within the defined repair areas according to VDOT patching Specifications.

5. Applying tack coat as required by VDOT Specifications.

6. Restripe pavement markings to match existing markings.

2.2 Progress Payments

Progress payments during construction will be based on the percentage of work completed on items listed on the approved Schedule of Values (Section 6.2) or by Contract Line Item. Actual construction completed and in place will form the basis for payment. Verification of the percentage (%) complete shall be initiated by the Contractor for approval by the COR. The Contractor shall make the computations for payment based on the government’s verification of work completed and in place for any periods for which progress payments are requested.

The Contractor shall furnish the originals of all field notes, invoices and payroll reports, and all other records relating to the basis for payment, to the CO, who shall use them as necessary to determine the final amount of progress payments. The Contractor shall retain copies of all such material furnished to the CO.

2.3 Project Meetings

2.3.1 Pre-Construction Meeting

After 100% complete Construction Documents are approved and prior to the start of construction, the CO will arrange an on-site pre-construction meeting with the Contractor. Notes of the meeting shall be recorded by the Contractor and will be distributed after the meeting. Deliverables required in advance of the meeting are listed in Section 6.5. The meeting agenda will include the following as a minimum:

1. Park rules and regulations

2. Correspondence procedures

3. Progress meetings

4. Lines of authority

5. Roles and responsibilities

6. Coordination of subcontractors

7. Submittal process

8. Distribution of or access to digital images of construction progress

9. Resolution to NPS comments on 100% Construction Documents

10. Final construction schedule

11. Weekly work schedule

12. Progress payments

13. Acceptance/rejection of the work

14. Liquidated damages

15. Labor standards and labor law application

16. Payroll reports

17. Modifications

18. Accident Prevention Plan and accident reporting

19. Contractor’s Quality Control Plan

1. Waste Management and Recycling Plan

1. Medical emergency processes, availability, emergency numbers, and contacts

2. Park permits, burning construction waste, rules of the road, alcohol use, housekeeping, firearms, pets, natural and cultural resource concerns

3. Access and site constraints

4. Visitation and public relations

5. Environmental and sustainability requirements for the project

6. Archeological resources protection requirements

3. Construction Requirements

3.1 Construction Support

3.1.1 Staging Areas

Construction sites will be limited to the smallest feasible area. Ground disturbance and site management will be carefully controlled to prevent undue damage to vegetation, soils, and archeological resources and to minimize air, water, soil, and noise pollution.

Confine storage of construction materials and equipment to immediate vicinity of project site, or as directed by the CO. Coordinate location of construction equipment and material storage with the park.

All staging areas shall be returned to pre-construction conditions once construction is complete.

Standards for this, and methods for determining when the standards are met, shall be developed in consultation with the CO. If used, all temporary water, sewer, sanitary facilities, electric and other utilities and utility connections shall be completely removed upon project completion.

Suggested staging areas for equipment: Tunnel Overlook Parking or Mary’s Rock Tunnel Parking.

The location of trailers, storage, field offices, sheds and staging areas will require CO approval.

3.1.2 Construction Camp

Establishment of a construction camp will not be permitted.

3.2 Access and Work Zones

Coordinate construction efforts with the CO such that there is minimal impact to the work of NPS personnel and the visiting public. Confine construction activities in any one sequence to the smallest practicable area to allow public access to resources. Coordinate trail and parking area closures with the park to ensure maximum public communication.

Work Zones and Traffic Control shall be established according to MUTCD Standards. Parking area closures will only be permitted for the duration that the asphalt treatment is required to cure. Closures shall be noted to the CO at least two weeks in advance of work. Work within the mainline of Skyline Drive shall allow continuous access for visitors and employees. Only one lane closures will be permitted along Skyline Drive. Full road closures shall not be permitted. Maximum traffic wait times shall not exceed 15 minutes.

3.3 Working Hour Restrictions

All work and deliveries shall be limited to normal weekday business hours unless otherwise approved by the CO. A standard workday will be 7 am to 5 pm. No work shall occur on NPS holidays or weekends without prior approval.

3.4 Environmental and Sustainability Requirements for Construction

The following are general environmental and sustainability requirements during construction, designed to minimize construction impacts.

3.4.1 Air

Employ construction practices that minimize dust production and combustion byproducts.

3.4.2 Water

Avoid materials that can leach toxic chemicals into the ground water. Do not allow toxic chemicals to enter sewers or storm drains. Submit a Storm Water Pollution Prevention Plan (Section 6.5.2) to the CO prior to Construction which meets local, state, federal requirements, and obtain all necessary permits;

as needed. Apply Best Management Practices, including vehicle wash-down areas, protection of equipment storage and maintenance areas, and sweeping of roadways related to hauling activities.

3.4.3 Soil

Protect against erosion, contamination and topsoil depletion. Any erosion or disturbance shall be fixed at no additional cost to the government.

3.4.4 Exotic Vegetation and Noxious Weeds

Prevent the introduction and minimize the spread of exotic vegetation and noxious weeds. Any fill, rock, or additional topsoil needed shall be obtained from a Government approved source. All areas disturbed by construction shall be re-vegetated using approved native seed and/or plants. Wash all vehicles, equipment, and tools PRIOR to entering work area to remove non-native soil, seeds, contaminants, etc.

3.4.5 Vegetation Salvage and Re-vegetation Plan

Any re-vegetation efforts shall use approved native species and/or native seed, and park policies regarding vegetation and site restoration shall be incorporated into the plan. The plan shall consider, among other things, the use of native species, plant salvage potential, the avoidance of exotic vegetation and noxious weeds, and the use of pedestrian barriers.

3.4.6 Habitats

Protect natural habitats and ecological systems on facility site.

3.4.7 Special Status Species

To protect any unknown or undiscovered threatened, endangered, or special status species, the construction contract will include provisions for the discovery of such. The Contractor should contact the park for direction for evaluation of any special species at the site.

3.4.8 Noise

Minimize noise generation during construction. Operate power equipment in accordance with local noise restrictions.

3.4.9 Materials

Use resources efficiently. Select materials and use construction practices that achieve the most efficient use of resources and materials.

3.4.10 Waste Management Goals

Employ processes that ensure the generation of as little waste as possible. Minimize waste generation due to over-packaging, poor planning, breakage, mishandling, contamination, error or other factors. Of the waste generated, as much as is economically feasible shall be reused, salvaged or recycled. Waste disposal in landfills shall be minimized. All material unsuitable for recycling must be disposed of, in a legal manner, at public or private dumping areas outside the park.

Materials that may be recycled include but are not limited to the following:

1. Cardboard, paper, packaging

2. Clean dimensional wood, pallet wood

3. Beverage containers

4. Concrete

5. Concrete Masonry Units

3.4.11 Air and Water Pollution Control

Air quality impacts are expected to be temporary and localized. All necessary and reasonable measures shall be taken to reduce air and water pollution by any material or equipment used during construction.

Volatile wastes shall be stored according to best industry practices and in covered containers.

3.4.12 Cultural Resources

If archeological resources are discovered at the project site while the archeological monitor is absent, all work in the vicinity of the discovery must stop immediately, and the discovery must be reported to the

COR/CO.

3.5 Quality Control

3.5.1 General

The quality of all work shall be the responsibility of the Contractor. Inspect and test all work as needed to ensure that the quality of materials, workmanship, construction, finish, and functional performance is in compliance with applicable specifications and drawings. Quality Control Daily Reports shall be completed by the Quality Control Supervisor. Test reports shall be completed by person performing the test.

3.5.2 Quality Control Staff

The Contractor's Quality Control Supervisor may also perform the duties of Project Superintendent.

Required Quality Control Submittals are listed in Section 6.

1. Review quality control submittal requirements with personnel directly responsible for the quality control work.

2. Review all applicable specifications sections and drawings related to the feature of work.

3. Ensure that copies of all referenced standards related to sampling, testing and execution for the feature of work are available on site.

4. Ensure that provisions have been made for field control testing.

5. Examine the work area to ensure that all preliminary work has been completed.

6. Verify all field dimensions and advise the CO of discrepancies with contract documents.

7. Ensure that necessary equipment and materials are at the project site and that they comply with approved shop drawings and submittals.

8. Document all preparatory phase activities and discussions on the Contractor's Quality Control Daily Report.

9. Review control testing procedures to ensure compliance with contract requirements.

10. Document all initial phase activities and discussions on the Contractor's Quality Control Daily Report. Exact location of initial phase shall be indicated for future reference and comparison with follow-up phases.

3.5.3 Testing Laboratory and Equipment

Employ certified independent laboratories to perform sampling and testing. The testing laboratory organization shall be certified for the type of testing work to be done.

All measuring devices, laboratory equipment, and instruments shall be calibrated at established intervals against certified standards.

3.5.4 Documentation

Maintain Quality Control Daily Reports, Daily Test Report Information Sheets, and Accessibility Inspection Reports (attached) of quality control activities and tests.

Quality Control Daily Reports may not be substituted for other written reports required under clauses of the contract, such as Disputes, Differing Site Conditions, or Changes.

3.5.5 Enforcement

The Contractor shall stop work on any item or feature pending satisfactory correction of any deficiency noted by the Contractor’s quality control staff or the CO.

3.6 Temporary Materials, Equipment and Services

Temporary materials may be new or used but must be adequate in capacity for the required usage, must not create unsafe conditions, and must not violate requirements of applicable codes and standards.

3.6.1 Fire Protection Equipment

Observe and enforce standards of fire prevention. No open fires shall be allowed. A capable and qualified person shall be placed in charge of fire protection. The responsibilities shall include locating and maintaining fire protective equipment and establishing and maintaining safe torch cutting and welding procedures.

3.6.2 Vehicles and Equipment

Provide one fire extinguisher on each vehicle or piece of equipment. Extinguishers shall have a minimum UL rating of 2-A:10-B:C.

3.6.3 Hazard Control

Take all necessary precautions to prevent fire during construction. Do not store flammable or combustible liquids in existing structures. Provide adequate ventilation during use of volatile or noxious substances.

3.6.4 Spark Arresters

Equip all gasoline or diesel-powered equipment used in potential forest or grass fire locations with appropriate spark arresters. Locate internal combustion equipment so that exhausts discharge well away from combustible materials. Shut down equipment before refueling.

3.6.5 Smoking

Smoking within buildings or temporary storage sheds is prohibited. No smoking within 25 feet of any building

3.6.6 Power

Any power necessary to complete construction shall be furnished by contractor. Generators may be utilized.

3.6.7 Telephone

Cell phone service is not always reliable at the project site.

3.6.8 Water

Contractor shall provide any potable or non-potable water when utilized in a construction capacity and pay all costs.

3.6.9 Sanitary Facilities

The Contractor shall provide and maintain temporary toilet facilities in accordance with State Health Department and NPS regulations for use of Contractor’s personnel if needed at remote locations.

Completely remove sanitary facilities upon completion of work. The park will allow contractor’s employees to use public restrooms on a limited basis located on site; confirm with the park prior to commencing work.

3.7 Work Limits

Working limits for full depth asphalt patching and repair will be marked by NPS staff (estimated to be 1,200 SF) and will allow for up to one foot of disturbance outside of existing pavement edges. Confine all operations to work limits of the project. Prevent damage to natural surroundings. Contractor is responsible for restoring damaged areas outside the work limits, repairing or replacing damaged trees, plants, and cultural resources - including rock curbing and drinking fountains at no additional expense to the NPS.

Provide temporary barriers to protect existing trees, plants, root zones and cultural resources that are to remain in place. Do not remove, injure, or destroy trees or other plants without prior approval. Consult with the COR. If agreed-upon, remove roots and branches that interfere with construction. Do not fasten ropes, cables, or guys to existing trees. Carefully supervise excavation, grading, backfilling, and other construction operations near trees and plants to prevent damage.

3.8 Maintaining Existing Utilities

Location of existing utilities is the responsibility of the Contractor. Disruptions of services shall be kept to a minimum. The Contractor shall coordinate with the local utility companies or NPS subject matter experts. All disruptions shall be arranged at least 48 hours in advance with the NPS and must be approved by the CO.

Construction procedures will prevent accidental disruptions to facilities outside the project limits by investigation of existing utilities and protection during construction: accidental disruptions shall be remedied at no cost to the NPS.

3.9 Hauling Restrictions

36 CFR §4.11 - VEHICLE LOAD, WEIGHT AND SIZE LIMITS

(a)The following load, weight and size limits, which are more restrictive than State law, apply to the roads indicated under the terms and conditions, and/or under permit as noted:

• Vehicles that exceed the loads, weight or size limits specified below are prohibited from travel on Park roads without a permit.

• When vehicle or vehicle combination gross weight exceeds 40,000 lbs. between May 1 to November 30 (inclusive) of each year.

• When vehicle or vehicle combination gross weight exceeds 20,000 lbs. during the period of December 1 to April 30 (inclusive) of each year.

• When road condition signing at the various entrances to Shenandoah National Park indicate weight restrictions which are less than the gross combined vehicle weight of vehicle being used.

• When size and/or length of vehicle requires special permit under state regulations.

• Travel through Mary's Rock Tunnel by vehicles over 12 feet 8 inches in height or over 11 feet in width.

• All such requests, other than emergency responses, should be in writing. The application should state:

1. The approved Park project which requires this type of equipment.

2. Alternatives identified.

3. Safety procedures for the protection of visitors, staff and resources

4. Liability limits and copies of a current insurance policy

Generally, applicants should follow the following guidelines in their planning. These guidelines are in compliance with maximum load limits suggested by the Federal Highway Administration for travel on Skyline Drive. However, weather, road, route or other conditions may require lower limits or may permit higher limits.

Single unit's Gross vehicle weight (lbs.)

2 axles 40,000

3 axles 48,000

4 axles 52,000

Combination Units Gross Vehicle Combination (lbs.) 3 axles 57,000

4 axles 62,000

5 or more axles 66,000

Limits are essential to protect the motor road and appurtenances, to protect resources, and for reasons of visitor safety.

Comply with all legal and local load restrictions in the hauling of materials.

3.10 Accident Prevention

3.10.1 Accident Prevention Program

Prior to the Preconstruction Meeting, submit a site-specific accident prevention program as described in Section 6.5.1. The program must be accepted by the NPS before any on-site work may begin.

3.10.2 Accident Reporting

Reportable accidents, defined as death, occupational disease, traumatic injury to Contractor’s personnel, NPS employees or the public, property damage of any accident and fires, must be reported immediately. Complete an Accident/Property Damage Report (attached Form CM-22) and forward to the CO within seven days.

3.10.3 Quality Assurance

Ensure that all employees are physically qualified to perform their assigned duties in a safe manner. Do not allow employees to work if their abilities are impaired. Operators of all equipment shall be able to understand signs, signals and operating instructions, and be capable of operating such equipment.

3.10.4 Safety Measures

Contractor must provide the following:

1. First aid supplies.

2. Personal protective equipment that meets the requirements of NIOSH and MSHA.

3. Emergency instructions, including telephone numbers and reporting instructions for ambulance, physician, hospital, fire department and park police. Place in conspicuous locations at the worksite.

4. Adequate egress at all times in accordance with the Life Safety Code (NFPA 241).

3.10.5 Training

Provide training for first aid and hazardous material handling and storage.

3.11 Housekeeping

Keep project neat, orderly, and in a safe condition at all times.

3.12 Project Close-out

3.12.1 Cleaning

Before scheduling the final inspection, remove all tools, equipment, surplus materials, and rubbish.

Restore or refinish surfaces that are damaged due to work of this contract to original condition. Remove grease, dirt, stains, foreign materials, and labels from finished surfaces. Pick up and remove all construction debris from the site. At time of final inspection, project shall be thoroughly clean and ready for use.

3.12.2 System Demonstration and Training

Train designated personnel in maintenance and other requirements of materials. Instructors shall be thoroughly trained in operating theory as well as practical operation and maintenance work for each type of material.

4. Project Description and Technical Requirements

4.1 Existing Conditions

4.1.1 Existing Site

1,200 SF of Skyline Drive has become unsafe due to deteriorated conditions including weathering, severe potholing, rolling, cracking and lack of proper functionality. This section of failing asphalt will receive a full depth asphalt patch and repair. The intent of the project is to replace deteriorated surfaces, mitigate existing degradation and hazardous conditions associated with Skyline Drive and listed parking areas.

4.2 Detailed Project Description

4.2.1 Repair 1,200 SF of Asphalt Along Skyline Drive

The work includes, but is not limited to the following:

Repair approximately 1,200 SF of asphalt at mile post 32.1 (Mary’s Rock Tunnel), along Skyline Drive.

Area to be repaired will be marked by NPS staff using marking paint which will identify the working limits. Asphalt shall be saw cut in a straight line, perpendicular to the flow of traffic. Repair shall include removal and disposal of existing asphalt. Subbase shall be restabilized and meet compaction of at least 95% or greater and clean and free from debris contaminants. Contractor shall provide 3rd party compaction tests prior to repaving. If the subbase material is compromised, the contractor shall remove, replace, and compact subbase, prior to paving operations. Asphalt pavement shall be placed according to VDOT Standards for full depth patch repair. Contractor is responsible for replacement of existing pavement markings to match adjacent roadway markings.

4.3 Project Criteria and Performance Requirements

4.3.1 Accessibility

If the work will require a deviation from the current footprint or specifications, the contractor shall provide options with cost efficiency, minimal excavation, limited added base/subbase materials, and limited footprint alteration.

4.3.1.1 Demolition

Remove and dispose of all non-natural hard surfaces (asphalt). Remove subgrade(s) and fill that are not suitable for new paving. Salvage for re-use any subgrade materials, as appropriate. The Contractor is responsible for the cost to remove, haul and dispose of all demolished and/or unused construction materials at an off-site location.

4.3.1.2 Construction

Limit excavations to area identified and marked by NPS Staff (See Section 4.8 for definition of Work Limits.) Ensure that subgrade conditions are appropriate for selected paving systems. Where necessary, provide subbase course materials suitable for selected paving system. Place new paving according to VDOT specifications and/or manufacturer’s recommendations.

Materials for paving, regrading, new fill, new subbase, replacement stone for curbs, etc. shall not be obtained from within the park without express permission of the NCR staff.

4.4 Project Technical Requirements

4.4.1 Outline Specifications - Division 32 Exterior Improvements

SECTION 32 01 17.72 - FULL DEPTH PATCHING (FDP1) OF FLEXIBLE PAVING

PART 1 - GENERAL

1.1 SUMMARY

A. This work consists of the following:

1. Saw cutting of asphalt concrete pavement along repair limits.

2. Removal of asphalt concrete pavement within the defined repair limits.

3. Placement and compaction of aggregate base course on prepared subgrade.

4. Placement and compaction of hot asphalt concrete for roadways within the defined repair areas.

5. Applying tack coat.

B. Full Depth Patching – Type 1 (FDP1) shall be performed as shown in the plans or exhibits, and as directed by the Contracting Officer (CO). This work will be undertaken on existing asphalt concrete surfaces after the milling of the asphalt concrete surface.

C. Measurement Procedures

1. Full Depth Patching – Type 1 (FDP1) of Asphalt Pavement will be measured per square foot. The lump sum contract bid for Full Depth Patching – Type 1 of Asphalt Pavement will include:

· all sampling and testing required by the contract.

· all materials, labor, and equipment required to remove and dispose of existing materials, prepare the subgrade, place and compact the aggregate base course, place tack coat, and place and compact the asphalt concrete.

D. Payment Procedures

1. The accepted work will be paid at the contract lump sum price for all work.

1.2 REFERENCES

A. Virginia Department of Transportation (VDOT)

1. 2020 Road and Bridges Specifications

2. Virginia Test Methods (VTMs) B. FAR - Federal Acquisition Regulations

1. FAR 46.105 Contractor responsibilities

2. FAR 52.236-9 Protection of Existing Vegetation, Structures, Equipment, Utilities, and Improvements

3. FAR 52.246-12 Inspection of Construction

1.3 SUBMITTAL

National Parks Service (NPS) approval is required for submittals listed below before excavation of partial depth patch and production and placement of any HMA pavement.

1. Aggregate Base Course, including test and gradation reports;

a. After a representative quantity of aggregate is produced and when requested by the COR, submit proposed target values for the appropriate sieve sizes along with a representative at least 14 days before incorporating the aggregate into the work.

2. Proposed Job Mix Formula (JMF) and related certifications;

3. Testing Laboratory Certification of Compliance;

4. Quality Control Technician Certifications;

5. Production Plant Certification;

6. Manufacturer’s certificate for emulsified asphalt

7. Certified test reports for approval not less than 10 days before material is required for the work. Test reports shall be provided for base and subbase material and shall include as a minimum gradation and optimum density information.

PART 2 – PRODUCTS

2.1 MATERIALS

A. Tack Coat

1. Tack Coat shall be placed in accordance with VDOT Section 310.

2. Tack Coat material shall conform to VDOT Section 210

B. Asphalt Concrete

1. Provide a hot asphalt concrete mix composed of crushed stone or gravel and asphalt binder mixed in an approved plant, in accordance with Section 32 12 16.01 Minor Asphalt Pavement and VDOT Section 211. Use VDOT Asphalt Concrete Mix Type

IM-19.0A.

C. Aggregate Base Course.

1. Furnish Aggregate Base Course in accordance VDOT Section 208.

2. Aggregate Base Course shall meet the requirements of VDOT Gradation 21A, Type I.

PART 3 – EXECUTION

3.1 PREPARATION

1. Removing Material. Saw cut pavements as illustrated in the Full Depth Patching – Type 1 (FDP1) detail in the plans. Construct structurally adequate debris shields to contain debris within the construction limits. Do not permit debris to enter waterways, travel lanes open to public traffic, or areas designated not to be disturbed.

B. Disposing of Material. Dispose of debris and unsuitable and excess material as follows:

1. Remove from project. Recycle or dispose of material legally off the project.

Furnish a statement documenting the nature and quantity of material processed or sold for recycling. Otherwise, furnish a signed copy of the disposal agreement before disposal begins.

C. Make the excavation square or rectangular with faces straight and vertical to a depth that will allow the placement of a minimum of 6” of crushed aggregate base beneath the existing thickness of asphalt concrete. Refer to the Full Depth Patching – Type 1 (FDP1) detail in the plans.

3.2 APPLICATION

A. The Contractor may use power pavement saw-cutting or milling or equipment approved by the CO such that no damage occurs to the finished pavement edge. A hand-held pavement cutter will not be allowed for cutting the perimeter of the patch at the pavement surface. Remove the existing bound pavement to the defined limits as indicated in the Full Depth Patching – Type 1 (FDP1) detail in the plans and Pavement Evaluation Report, or as directed by the CO.

2. Aggregate Base Course Material. The aggregate base course shall be mixed and supplied in conformance with VDOT Section 208 for Gradation 21A, Type I. Spread and shape the mixture on the prepared subgrade in a uniform layer. Do not place the mixture in a layer exceeding 6 inches in compacted thickness. Route hauling equipment uniformly over the full width of the surface to minimize rutting or uneven compaction.

C. Aggregate Base Compaction. Compact the Aggregate Base Course in accordance with the requirements in VDOT Section 309 based on the gradation of the supplied 21A, Type I material. Compact each layer full width. Roll from the sides to the center where repair width allows, parallel to the centerline of the road. Along curbs, headers, walls, and all places not accessible to the roller, compact the material with approved tampers or compactors. Determine the in-place density and moisture content in accordance with VDOT Section 309 or other approved test procedures.

D. Aggregate Base Course Surface Tolerance. If grade finishing stakes are required, finish the surface to within ±0.05 feet from staked line and grade elevation. If grade finishing stakes are not required, shape the surface to the required template and check the surface with a 10-foot straightedge. Defective areas are surface deviations in excess of 1/2 inch in 10 feet between any two contacts of the straightedge with the surface.

Correct all defective areas by loosening the material, adding or removing material, reshaping, and compacting.

E. Maintain the aggregate base course to the correct line, grade, and cross-section by blading, watering, rolling, or any combination thereof until placement of the next course.

Correct all defects according to Subsection D above.

F. Swab or paint the vertical faces of the existing asphalt concrete within the repair areas with tack coat such that full coverage (100%) of the entire vertical face is achieved to provide a uniform film of asphalt remains when cured.

G. Asphalt Concrete Placement. Place the IM-19.0A asphalt concrete with a mechanical paver within the repair limits where practical. Lifts of IM-19.0A shall have a minimum thickness of 2 inches and maximum thickness of 3 inches. The upper or final lift of asphalt concrete within the repair areas will be placed with a mechanical paver where practical. In areas where mechanical spreading and finishing is impractical the asphalt concrete may be placed by hand raking, screeding, or by other methods approved by the CO. Construct a surface that is uniform in texture and cross-section.

H. Asphalt Concrete Compaction.

1. Compact the IM-19.0A asphalt concrete to a minimum of 92 percent of the maximum theoretical density. Complete compaction before the mix temperature falls below 160°F. Determine density by nuclear gauge or as directed by the CO.

2. Compact areas that are not accessible to rollers by other approved methods.

I. Complete placement and compaction of the aggregate base and asphalt concrete within 24 hours of excavation. If drop-offs are left overnight, sign all drop-offs in excess of 1- 1/2 inches with "Uneven Lanes" warning signs, but in no case will a drop-off greater than 2 inches be allowed.

J. Pavement Smoothness. Use a 10-foot metal straightedge to measure at right angles and parallel to the centerline. Defective areas are surface deviations in excess of 1/4 inch in 10 feet between any two contacts of the straightedge with the surface. Correct defective areas using approved methods.

K. The perimeter of the patch at the finished surface shall be painted with tack coat such that a 4" wide strip will be equally spaced on the new and existing pavement. The tack coat material shall be dusted with stone screenings or stone dust such that no tracking or pickup of the seal will occur under traffic.

3.3 FINAL ACCEPTANCE

Asphalt Concrete will be evaluated under VDOT Sections 211 and 315.

Aggregate Base Course will be evaluated under VDOT Sections 208 and 309.

Tack Coat will be evaluated under VDOT Sections 210 and 310.

END OF SECTION

5. Deliverables and Submittals

5.1 Construction Schedule

Upon award, the Contractor shall determine and provide a schedule for completion of the project, including identification of probable critical paths. The schedule shall include following design and construction milestones and elements, and any others identified by the Contractor:

Milestone/Element

Minimum Duration

Notice to Proceed

Construction Start Date 60 calendar days

Construction Substantial Completion Date 20 calendar days

Construction Final Completion Date 10 calendar days

Upon acceptance of the Construction Schedule by the Contracting Officer, the Construction Schedule will be used to evaluate the Contractor's monthly applications for payment. The schedule shall be updated and transmitted to the CO before the Pre-Construction meeting, monthly with updates, and immediately if any adjustments impacting the schedule by a week or more are required.

5.2 Schedule of Values

After contract award, submit a schedule of dollar values based on the Contract Price Schedule.

Breakdown each lump-sum item into component parts of design deliverables or construction work for which progress payments may be requested. The total costs for the component parts of work shall equal the contract line-item amount for that lump-sum item. The CO may request data to verify accuracy of dollar values. Include mobilization, general condition costs, overhead and profit in the total dollar value of unit price items and in the component parts of work for each lump-sum item, as described below. Do not include mobilization, general condition costs, overhead or profit as a separate item.

The total cost of all items shall equal the contract sum. The Schedule of Values will form the basis for progress payments. An acceptable Schedule of Values shall be agreed upon by the Contractor and CO before the first progress payment is processed.

5.3 Technical Specifications and Submittals

5.3.1 Technical Specifications

The Contractor shall prepare and submit for review technical specifications covering the work described in this document, due with Construction Drawings. Technical specifications shall be written in Microsoft Word and follow Construction Specifications Institute (CSI) MasterFormat 2004 Edition numbering.

Additional information may be found at www.csinet.org.

5.3.2 Submittals

The following submittals will require NPS approval prior to procurement or performance of the work:

Submittals Format and Quantity Electronic Asphalt Paving

Manufacturer’s/supplier’s product data 2 sets: 1 COR, 1 CO

Samples (stabilizer and crusher fines)

Manufacturer’s/supplier’s product data 2 set: 1 COR, 1 CO

5.3.3 Material Submittal and Approval Procedures

Other types of submittals in addition to those above may be required. Submit design and construction submittals a minimum of fourteen (14) calendar days prior to the need for approval. Submit two (2) copies of paper submittals, directing one to the COR and one to the CO.

Submit sufficient information based upon the performance specifications for the NPS to make an informed decision on compliance or lack of compliance for the items above. Submittals shall be transmitted using NPS form CM-16. A copy of the form is included as an attachment.

5.3.4 Contracting Officer's Review

Any work done or orders for materials or services placed before approval shall be at the Contractor's own risk.

After reviewing submittals, the CO will return one copy of form CM-16 and one copy of applicable (marked up) submittal sheets to the Contractor. All submitted items will be retained.

Samples shall be large enough to illustrate clearly the functional characteristics and full range of color, texture, or pattern. When using Manufacturers' Catalog Sheets or cut sheets, submit only pertinent pages and clearly mark each copy of standard printed data to identify specific products proposed for use.

The returned submittal will be marked in one of three ways as defined below:

APPROVED: Acceptable with no corrections.

APPROVED WITH NOTATIONS: Minor corrections or clarifications are required. All comments are clear and no further review is required. The Contractor shall address all review comments when proceeding with the work.

DISAPPROVED - RESUBMIT: Rejected as not in accordance with the contract or as requiring major corrections or clarifications. The CO will identify the reasons for disapproval. The Contractor shall revise and resubmit with changes clearly identified.

5.4 Pre-Construction Deliverables

The following deliverables shall be submitted a minimum of one week prior to the Pre-Construction Meeting.

1. Letter designating the Contractor’s Project Superintendent

2. Final project schedule with construction portion fully developed

3. Accident Prevention Program

4. A list of subcontractors for this project (must be same as in the Contractor’s proposal)

5. Waste Management and Recycling Plan

6. Contractor Quality Control Plan

7. Visitor Access Control Plan (projects affecting trails and visitor use facilities)

8. Traffic Control Plan

9. Storm Water Pollution Prevention Plan and Submittal Process

5.4.1 Accident Prevention Program

The site-specific Accident Prevention Program shall comply with OSHA and project requirements.

Include the following:

1. Name of responsible supervisor to carry out the program

2. Safety meetings

3. First aid procedures

4. Outline of each phase of work

5. Hazards associated with each phase and methods proposed to ensure property protection and safety of the public

6. NPS staff and Contractor employees, including contact information

7. Training

8. Plan for possible emergency situations

9. Housekeeping and fire protection

5.4.2 Storm Water Pollution Prevention Plan (if applicable)

The site-specific Storm Water Pollution Prevention Plan (SWPPP) shall comply with the Clean Water Act, the National Pollutant Discharge Elimination System (NPDES) permit program, and all Federal, State, and local regulations. Refer to Section 4.5.2 and provide a SWPPP that includes the following information and forms:

1. Site description

2. Expected sequencing of operations and construction schedule

3. Weather monitoring procedure

4. Descriptions and details of erosion controls, including dust control

5. Erosion control plans

6. Controls for other potential onsite storm water pollutants

7. Applicable specifications

8. Maintenance and inspection procedures and forms

9. Description of potential non-storm water discharges at site

10. Notice of Intent (NOI) form

11. Notice of Termination (NOT) form

12. Contractor and Sub-contractor Certification forms

13. Other record keeping forms and procedures

14. Housekeeping Best Management Practices, including vehicle wash-down areas, protection of equipment storage and maintenance areas, and sweeping of roadways related to hauling activities

5.4.3 Waste Management Plan

Refer to Section 4.6.10 and develop a site-specific waste management plan that identifies waste reduction and recycling measures. List each type of waste and whether it will be salvaged, recycled, or disposed of in landfill or incinerator.

1. Salvaged Materials for Reuse: For materials that will be salvaged and reused in this project, describe methods for preparing salvaged materials before incorporation into the Work.

2. Salvaged Materials for Sale or Donation: Include a list of local receivers for materials that will be sold or donated to individuals and organizations.

3. Recycled Materials: Include list of local receivers and processors and type of recycled materials each will accept.

4. Disposed Materials: Indicate how and where materials will be disposed of.

5.5 Quality Control Submittals

5.5.1 Contractor Quality Control Plan

After Contract Award, and Prior to the Pre-Construction meeting, submit for approval a written Contractor Quality Control (CQC) plan to the CO.

If the plan requires any revisions or corrections, the Contractor shall resubmit the plan within ten (10) calendar days. The Government reserves the right to require changes in the plan during the contract period as necessary to obtain the quality specified. No change in the approved plan may be made without written concurrence by the CO.

Quality Control is as described in previous sections. The plan shall include:

1. A list of personnel responsible for quality control and assigned duties. Include each person's qualifications.

2. A copy of a letter of direction to the Contractor's Quality Control Supervisor outlining assigned duties.

3. Names, qualifications, and descriptions of laboratories to perform sampling and testing, and samples of proposed report forms.

4. Methods of performing, documenting, and enforcing quality control of all work.

5. Methods of monitoring and controlling environmental pollution and contamination as required by regulations and laws.

5.5.2 Daily Reports

Submit on the first workday following the date covered by the report, showing all inspections and tests.

Utilize the forms included as attachments.

5.5.3 Test Reports

Test all work as needed to ensure that the quality of materials, workmanship, construction, finish, and functional performance is in compliance with applicable specifications and drawings. Submit Daily Test Information Sheets with Quality Control Daily Reports. Submit failing test results and proposed remedial actions within four hours of noted deficiency. Submit three copies of complete test results not later than one calendar day after the test was performed.

If the CQC plan and Quality Control Daily Reports are not submitted as specified, the CO may retain all payments until such time a plan is accepted and implemented, or may retain payments for work completed on days there are no Quality Control daily reports.

5.5.4 Off-Site Inspection Reports

Submit prior to shipment to project site.

5.6 Project Close-Out Submittals

Provide the following documents at project close-out and before submitting a request for final inspection.

5.6.1 Warranties

Provide manufacturer’s standard warranty for all proprietary products used (e.g. Stabilized Aggregate Paving).

5.6.2 Substantial Completion and Final Inspection

Submit written certification that project, or designated portion of project, is substantially complete, and request, in writing, a final inspection. Upon receipt of written request that project is substantially complete, the CO will proceed with inspection within 10 calendar days of receipt of request or will advise the Contractor of items that prevent the project from being designated as substantially complete.

When work is determined to be substantially complete, the CO will prepare a list of deficiencies ("Punch List") to be corrected before final acceptance. The CO will issue a Letter of Substantial Completion.

If work is not determined to be substantially complete, the CO will notify the Contractor in writing. After completing work, the Contractor shall resubmit certification and request a new final inspection.

If, following final inspection, the work is determined to be substantially complete, CO will prepare a list of deficiencies to be corrected before final acceptance and issue a Letter of Substantial Completion.

Contractor shall complete the work described on the list of deficiencies within 30 calendar days, as weather permits. If the Contractor fails to complete the work within this time frame, the CO may either replace or correct the work with an appropriate reduction in the contract price or charge for re-inspection costs in accordance with the Inspection of Construction clause of the contract.

5.6.3 Acceptance of Work

After all deficiencies have been corrected, the CO will issue a Letter of Acceptance.