ATTACHMENT 1 SPECIFICATIONS FOR NANTAHALA RANGER DISTRICT.pdf

SPECIFICATIONS

FOR

NANTAHALA RANGER DISTRICT

ADMINISTRATIVE COMPLEX

WATER SYSTEM IMPROVEMENTS

NANTAHALA NATIONAL FOREST

NF’s IN NC

ENGINEERING

MAY 2021

i

TABLE OF CONTENTS

DIVISION 1 GENERAL REQUIREMENTS PAGE

01110 Summary of Work……………………………………………….1 01140 Construction Constraints……………………………………….3 01270 Measurement & Payment………………………………………4 01330 Submittals…………………………………………………………7 01420 Reference Standards…………………………………………...8 01450 Quality Control…………………………………………………...9 01460 Compaction Control & Testing………………………………..11 01500 Mobilization……………………………………………………..12 01720 Construction Staking…………………………………………..13

DIVISION 2 SITE WORK

02220 Selective Demolition…………………………………………...14 02250 Sheeting, Shoring & Bracing…………………………………..15 02310 Earthwork………………………………………………………..17 02315 Trenching, Backfilling & Compacting for Utilities……………19 02720 Aggregate Base…………………………………………………21 02740 Hot Bituminous Pavement……………………………………..22 02920 Mulching…………………………………………………………26

DIVISION 3 CONCRETE

03100 Concrete Formwork……………………………………………27 03300 Cast in Place Concrete………………………………………..28 03360 Concrete Finishing……………………………………………..30 03370 Concrete from Packaged Dry Mix……………………………31

DIVISION 15 MECHANICAL

15100 Valves & Valve Boxes…………………………………………32 15200 Hydrants & Eye Wash Stations……………………………….33 15213 Waterlines……………………………………………………….34 15214 Disinfection of Waterlines……………………………………..36

SECTION 01110

SUMMARY OF WORK

PART 1 GENERAL

1.01 PROJECT LOCATION

A. Location of work is the Nantahala Ranger District Office and Work Center, 90 Sloan St in Franklin North Carolina

1.02 DESCRIPTION

A. This work shall consist of water system improvements to the existing water system for the Nantahala Office Complex. The work shall include the following: replacement of existing waterline and appurtenances.

B. The Contractor shall furnish all labor, materials, equipment, tools, supplies, supervision and transportation and perform all of the work required AS SHOWN ON THE DRAWINGS AND SPECIFICATIONS.

1.03 STORAGE OF MATERIALS

A. The Contractor may store materials and equipment at the work site at their own risk. All materials must be kept in an area designated by the COR and be neat and orderly.

B. The Contractor shall install barricades or tape barriers around all open excavations and storage areas.

1.04 EXISTING FACILITIES

A. Sanitary facilities are available at the site.

B. Electricity is available at the job site. In areas where electricity is available, the Contractor shall not be charged for electricity used for construction.

C. There is potable water available at the job site.

1.05 SAFETY

A. No trenches shall be left open overnight.

B. Construction fencing shall be used to limit access to the construction areas by the general public or Forest personnel.

1.06 PROJECT CLOSEOUT

A. Instruction of Government Personnel in Use of Facilities

B. It is the responsibility of the Contractor to see that the proper manufacturer's representative, subcontractors, contractor's superintendents, etc., are available at completion of the job and before acceptance to provide instructions in the use of all facilities and equipment.

C. Operating and Maintenance Manuals

1. The Contractor shall furnish the following:

a. Instructions for maintenance of all systems.

b. Copies of hardware schedule.

c. Warranties

d. Shop drawings and brochures on all special items and equipment.

e. Three copies of the complete operating and maintenance manual for mechanical and electrical equipment. The bound manual shall contain the following:

1. Word description of the systems.

2. General operating instructions, including copies of posted specific instructions.

3. Maintenance instructions, followed by tabulated manufacturer's descriptive literature, shop drawings, performance curves and rating data, spare parts lists, and maintenance manuals.

SECTION 01140

CONSTRUCTION CONSTRAINTS

1.01 DESCRIPTION

A. This specification covers the scheduling requirements and restrictions for this project.

1.03 TIME REQUIREMENTS

A. Contractor shall coordinate with Nantahala District Ranger any utility outages that may occur for the district office or work center.

SECTION 01270

MEASUREMENT AND PAYMENT

1.01 SUMMARY

A. The intent of this section is to explain, in general; what is and what is not included in a bid item; the limits or cut-off points where one bid item ends and another begins; and method of measurements and basis of payment for work items listed in the Bid Item Schedule.

B. Work:

1. Furnishing all labor, materials, equipment, and other incidentals necessary to successfully complete the project or any portion of it, and carrying out all duties and obligations imposed by the contract on the Contractor.

C. Payment:

1. For each individual item listed here and in the Schedule of Items, payment shall be full compensation for all work related to the particular item in accordance with these specifications, as shown on the drawings, and as staked in the field.

2. Measurement and payment for contract work shall be made only for and under those pay items included in the Schedule of Items. All other work and materials shall be considered incidental or as included in the payment for items shown.

1.02 DETERMINATION OF QUANTITIES

A. The contractor shall perform, or cause to be performed, all measurement of quantities of materials incorporated into the work processes that are to be measured under the provisions of the contract.

B. Quantity Measurements:

1. The Contractor shall make all measurements for computation of quantities for all work items except those specified for payment by Contract Quantity (CQ) or Lump Sum Quantity (LSQ).

2. The contractor shall compute the quantities for periodic progress payments; the Contracting Officer shall compute the quantities for the final payment based on measurements taken by the Contractor.

3. All Contractor measurements are subject to verification.

4. The Contractor shall submit all field notes, calculation sheets, and other data used to determine quantities.

5. The Contractor shall certify in writing as to the accuracy of the measurements and computations submitted.

C. The following measurements and calculations are used to determine contract quantities.

1. For individual construction items, longitudinal and lateral measurements for area computations shall be made horizontally or corrected to horizontal measurement unless otherwise specified.

Measurements for geotextiles, netting and erosion control blankets shall be along slope lines.

2. The average end area method shall be used to compute volumes of excavation or embankment.

However, if in the judgment of the Contracting Officer (CO), the average end area method is impractical, measurement shall be made by volume in hauling vehicles or by other three-dimensional methods.

3. Structures shall be measured according to neat lines shown on the drawings or as altered by the CO, in writing, to fit field conditions.

4. For items that are measured by the linear foot, such as pipe culverts, fencing, guardrail, and underdrains, measurements shall be made parallel to the base or foundation upon which the structures are placed. Pipes shall be measured along center of invert.

5. For aggregates weighed for payment, the tonnage shall not be adjusted for moisture content, unless otherwise provided for.

6. For standard manufactured items--such as fence, wire, plates, rolled shapes, pipe conduits--identified by gauge, weight, section dimensions, and so forth, such identifications shall be considered the nominal weights or dimensions. Unless controlled by tolerances in cited specifications, manufacturer's tolerances shall be accepted.

1.03 UNITS OF MEASUREMENT

A. Payment shall be by units defined and determined according to U.S. Standard measure and by the following:

B. Cubic Yard: A measurement computed by one of the following methods:

1. Excavation, Embankment, or Borrow. The measurement computed by the average end area method from measurements made longitudinally along a centerline or reference line.

2. Material in Place or Stockpile. The measurement computed using the dimensions of the in-place material.

3. Material in the Delivery Vehicle. The measurement computed using measurements of material in the hauling vehicles at the point of delivery. Vehicles shall be loaded to at least their water level capacity. Leveling of the loads may be required when vehicles arrive at the delivery point.

C. Each: One complete unit, which may consist of one or more parts.

D. Linear Foot: Linear feet measured horizontally.

PART 2 METHOD OF MEASUREMENT

2.01 GENERAL

A. One of the following methods of measurement for determining final payment is designated on the Schedule of Items for each pay item:

B. CONTRACT QUANTITIES (CQ)

1. These quantities denote the final number or units to be paid for under the terms of the contract.

They are based upon the original design data available prior to advertising the project. Original design data include the preliminary survey information, design assumptions, calculations, drawings, and the presentation in the contract. Changes in the number of units shown in the Schedule of Items may be authorized under any of the following conditions:

a. As a result of changes in the work authorized by the CO.

b. As a result of the CO determining that errors exist in the original design that cause a pay item quantity to change by 15 percent or more.

c. As a result of the Contractor submitting to the CO a written request showing evidence of errors in the original design that cause a pay item quantity to change by 15 percent or more.

The evidence must be verifiable and consist of calculations, drawings, or other data that show how the designed quantity is believed to be in error.

C. ACTUAL QUANTITIES (AQ)

1. These estimated quantities which are determined from actual measurements of completed work.

D. LUMP SUM QUANTITIES (LSQ)

1. These quantities denote one complete unit of work as required by or described in the contract, including necessary materials, equipment, and labor to complete the job. They shall not be measured.

SECTION 01330

SUBMITTALS

1.01 REQUIREMENTS INCLUDED

A. Procedures

B. Manufacturers Instructions

C. Manufacturers Certificates

1.02 PROCEDURES

A. Submittals shall be furnished before fabrication or installation occurs. All submittals shall be evaluated and either approved or rejected by the COR within 14 days after their receipt. A minimum of four (4) copies of submittals shall be supplied to the COR.

B. If the Contractor intends to provide or install an item that is an "or equal" or differs from that which is specified or shown on the drawings, he/she shall submit all product data, revised drawings or new drawings to the COR. for approval.

C. The contractor shall submit four sets of the manufacturer's description of all "or equals" proposed in lieu of name brands specified. This description shall include:

1. Product name and model number

2. Manufacturer

3. Product description

4. Technical data

D. The contractor shall be required to furnish the following to the COR prior to commencing any work that relates to a respective submittal. (4 copies of all submittals required).

1. Finish Hardware

2. Mechanical and Plumbing Equipment Data and Drawings

3. Electrical Equipment Data and Drawings

E. Other submittals (in quantities indicated) are required as identified in these specifications.

1.03 MANUFACTURER’S INSTRUCTIONS

A. The Contractor shall provide three (3) copies of all of the manufacturers installation and maintenance instructions (written and/or drawings) to the COR.

1.04 MANUFACTURER’S CERTIFICATES

A. The Contractor shall provide all guarantees, certificates of performance, material of workmanship or warranties provided by the manufacturer or required by the specifications to the COR.

SECTION 01420

REFERENCE STANDARDS

1.01 QUALITY ASSURANCE

A. For products or workmanship specified by association, trade, or Federal Standards, comply with the requirements of the standard, except when more rigid requirements are specific or required by applicable codes.

1.02 SCHEDULE OF REFERENCES

AASHTO American Association of State Highway and Transportation Officials ACI American Concrete Institute ADA Americans with Disabilities Act AI Asphalt Institute ANSI American National Standards Institute ASTM American Society for Testing and Materials AWS American Welding Society FS Federal Specification NCDOT North Carolina Department of Transportation

1.03 TOLERANCES

A. Construction tolerances shall be as follows:

Elevations +/- 0.1 feet Alignment +/- 0.5 feet Slopes +/- 2.0% of slopesa

a) Maximum allowable deviation from staked slope measured will be from slope stakes or hinge points.

B. Deviations shall be uniform in the direction of change for a distance of 100 feet or more along the project centerline.

SECTION 01450

QUALITY CONTROL

1.01 WORK INCLUDED

A. The work shall consist of providing quality control in conformance with the Inspection of Construction provisions of this contract to ensure compliance with the drawings, specifications, and provisions of the contract. The Contractor shall provide all personnel, equipment, tests, and reports to meet the requirements of this specification.

PART 2 PRODUCTS

Not Used

PART 3 EXECUTION

3.01 QUALITY CONTROL SYSTEM

A. The Contractor shall provide and maintain a quality control system that will ensure that all services, supplies, and construction required under this contract conform to the contract requirements. The contractor shall perform, or cause to be performed, the sampling, inspection, and testing required to substantiate that all supplies, services, and construction conform to the contract requirements.

3.02 QUALITY CONTROL PLAN

A. The contractor shall submit in writing the following:

2. Authorities and responsibilities of inspection and testing personnel.

3. Experience and qualifications of inspection and testing personnel to be assigned and location of any (for hire) testing facility to be used.

B. The contractors proposed quality control plan shall be submitted to the COR for review prior to the contractor commencing work. The COR shall approve or disapprove the plan within 5 working days.

Construction work shall not begin prior to the contractor's receipt of written approval of the quality control plan.

C. The contractor shall submit to the COR in writing any proposed changes to the approved plan. Proposed changes shall not be put into effect until approved in writing by the COR.

3.02 SAMPLING & TESTING

A. The contractor shall provide and maintain appropriate measuring and testing devices, equipment, and supplies to accomplish the required measurement, testing and inspection in a timely manner. The contractor shall take samples and perform inspections and tests necessary to achieve the quality of construction required by the contract. Sampling and testing frequency for specific items shall be as defined in the specifications.

3.03 RECORDS

A. The contractor shall maintain current records of all inspections and tests performed. The following format or one containing the following information will be acceptable to the Government:

Project Number Contract Number

Pay Item Test Date Station Standard Results Initials

B. The contractor shall certify in writing that all inspections were performed in accordance with specifications. All testing and inspection records shall be submitted to the COR upon completion of the project.

3.04 BASIS OF PAYMENT

NOT A PAY ITEM. Incidental to other work.

SECTION 01460

COMPACTION CONTROL AND TESTING

PART 1 - GENERAL

A. This section covers all compaction for earth fills under pavement, footings, ramps, slabs, walkways, and other backfill as shown on the drawings and specified herein.

PART 2 – PRODUCTS

2.01 FILL

A. Material used for fills and backfills shall be as described in Section 02310, Earthwork.

PART 3 - EXECUTION

3.01 FILL & BACKFILL

A. The ground on which the fill or backfill material is to be placed shall be firm, dry, unfrozen, and cleared of all debris.

B. Compacted earth fills under concrete slabs, ramps, footings, and walkways shall be placed in approximately 12" lifts and be compacted to a uniform density until no visible settlement occurs.

C. Backfill around structures and supports shall be done in 8" lifts and compacted to a uniform density until no visible settlement occurs.

D. Compaction shall be accomplished by the use of a mechanical compaction equipment and shall continue until no visual displacement occurs.

E. Compaction testing shall not be required.

SECTION 01500

MOBILIZATION

1.01 DESCRIPTION

A. The work shall consist of preparatory work and operations necessary for the movement of personnel, equipment, supplies and incidentals to the project site. This includes all work and operations that must be performed or that cause costs to be incurred prior to beginning work on the various items on the project site.

Not Used

PART 3 EXECUTION

3.01 BASIS OF PAYMENT

PAY ITEM PAY UNIT

01500(01) Mobilization.........................……….…….........Lump Sum

SECTION 01720

CONSTRUCTION STAKING

A. The locations of all proposed new work relative to existing features are indicated on the construction drawings. Bench marks for vertical control and centerline station stakes for all utilities will be provided by the COR.

B. Construction staking shall be the responsibility of the contractor. Staking for any part of the work shall be approved by the COR prior to commencing construction on that part.

SECTION 02220

SELECTIVE DEMOLITION

A. This work shall consist of the removal and legal disposal of designated asphalt and concrete pavement, waterline, waterline appurtenances and other items as shown on the drawings and specified herein.

1.02 PROJECT CONDITIONS

A. Government will occupy portions of building immediately adjacent to selective demolition area. Conduct selective demolition so Government operations will not be disrupted. Provide not less than 72 hours' notice to CO of activities that will affect Government operations.

B. Maintain access to existing walkways, corridors, and other adjacent occupied or used facilities.

1. Do not close or obstruct walkways, corridors, or other occupied or used facilities without written permission from authorities having jurisdiction.

C. Government assumes no responsibility for condition of areas to be selectively demolished.

1. Conditions existing at time of inspection for bidding purpose will be maintained by Government as far as practical.

D. Utility Service: Maintain existing utilities indicated to remain in service and protect them against damage during selective demolition operations.

2.01 REPAIR MATERIALS

A. Use repair materials identical to existing materials.

B. If identical materials are unavailable or cannot be used for exposed surfaces, use materials that visually match existing adjacent surfaces to the fullest extent possible.

C. Use materials whose installed performance equals or surpasses that of existing materials.

3.01 PREPARATION

A. Site Access and Temporary Controls: Conduct selective demolition and debris-removal operations to ensure minimum interference with roads, streets, walks, walkways, and other adjacent occupied and used facilities.

B. Do not close or obstruct streets, walks, walkways, or other adjacent occupied or used facilities without permission from CO and authorities having jurisdiction. Provide alternate routes around closed or obstructed traffic ways if required by governing regulations.

C. Erect temporary protection, such as walks, fences, railings, canopies, and covered passageways, where required by authorities having jurisdiction.

D. Protect existing site improvements, appurtenances, and landscaping to remain.

E. Temporary Facilities: Provide temporary barricades and other protection required to prevent injury to people and damage to adjacent buildings and facilities to remain.

3.02 SELECTIVE DEMOLITION

A. General: Demolish and remove existing construction only to the extent required by new construction and as indicated. Use methods required to complete the Work within limitations of governing regulations.

1. Neatly cut openings and holes plumb, square, and true to dimensions required. Use cutting methods least likely to damage construction to remain or adjoining construction.

3.03 REMOVAL OF STRUCTURES

A. Such sawing as is necessary to produce a uniform line between the asphalt pavement to be retained and that which is to be removed shall be performed as directed by the COR.

B. The Contractor shall execute the demolition work in a way not to damage adjacent facilities to remain.

3.04 REPAIRS

A. Repair all existing site features to previously existing condition.

1. Concrete walks to be repaired per Sections of Division 3 – CONCRETE.

2. Asphalt surfaces shall be repaired to match existing strucutural section.

3. Disturbed landscaped areas shall be seeded as specified within the plans within 15 days of final grading.

3.05 DISPOSAL

A. All other demolished structures shall become the property of the Contractor. All demolition refuse and construction debris shall be removed and disposed of legally off of Government Land.

SECTION 02250

SHEETING, SHORING, AND BRACING

PART 1 – GENERAL

A. This work includes any additional support that the sides of a trench or excavation may require to remain stable during construction operations.

PART 2 - PRODUCTS

2.01 MATERIALS

A. Timber or metal members used by the Contractor shall provide adequate support of the soils during the work. The Contractor shall be responsible for selection of proper materials to maintain adequate support.

3.01 INSTALLATION

A. Excavations and sides of trenches shall be supported with adequate materials as necessary for the safety of personnel and protection of the pipe before backfilling.

B. Protect structures, utilities, sidewalks, pavements, and other facilities from damage caused by settlement, lateral movement, undermining, washout, and other hazards that could develop during excavation support and protection system operations.

C. The installation and removal of all lagging, sheeting, shoring, piling, and bracing shall be such to maintain the required trench or excavated section and to maintain the undisturbed state of the soils at and below the bottom of excavation.

3.02 REMOVAL

A. Remove excavation support and protection systems when construction has progressed sufficiently to support excavation and bear soil and hydrostatic pressures. Remove in stages to avoid disturbing underlying soils or damaging structures, pavements, facilities, and utilities.

B. All sheeting and shoring shall be removed when safe to do so.

SECTION 02310

EARTHWORK

A. This section covers all required site grading, including excavation and the placement of interior and exterior fills and the final dressing of the site within the construction area.

1.02 DEFINITIONS

A. Borrow: Satisfactory soil imported from off-site for fill or backfill.

B. Unclassified Excavation: Excavation to subgrade elevation and to lines and dimensions indicated regardless of the character of surface and subsurface conditions encountered, including rock, soil materials, and obstructions.

2.01 BACKFILL AND FILL MATERIAL

A. The material for the interior and exterior fills shall consist of surplus excavated material or imported fill consisting of a mixture of soil, gravel talus rock, disintegrated granite, semi-gravel, sand, caliche, shale, scoria, clinkers, cinders, or other suitable material.

B. The material shall be free from organic vegetative matter.

C. The maximum size of any particle shall not be greater than 3" in diameter.

D. Oversize material may either be removed or broken down to the specified dimension by any method which accomplishes reduction to that size.

E. The removal or the breakdown of oversize material to the specified size shall be done at the material source.

3.01 EXCAVATION

A. Excavation shall produce surfaces to line and grade shown on drawings. All excavated areas shall drain.

B. The root structure of all existing trees that are to remain shall not be disturbed. Do not operate heavy equipment within 10' of trees that are to remain.

3.02 EMBANKMENT

A. The contractor shall supply all fill material.

3.03 COMPACTION

A. Compact earth fills under all concrete slabs, ramps, and footings.

B. Compaction shall be in accordance with Section 01460, Compaction Control and Testing.

3.04 FINISHING

A. All slopes shall be rounded.

B. When all exterior earthwork is completed, the contractor shall give the entire site a final dressing to assure that all surfaces are in accordance with the elevations indicated on the drawings.

SECTION 02315

TRENCHING, BACKFILLING, AND COMPACTING FOR UTILITIES

A. Work included in this section covers all trenching, backfilling, and compacting for the installation of all utility lines.

1.02 DEFINITIONS

A. Backfill: Soil materials used to fill an excavation or as pipe bedding.

B. Initial Backfill: Backfill placed beside and over pipe in a trench, including haunches to support sides of pipe.

C. Subsequent Backfill: Backfill placed over initial backfill to fill a trench.

D. Subbase Course: Layer placed between the subgrade and base course for concrete or asphalt pavement or walk.

E. Aggregate Base Course: Layer placed between the subgrade and asphalt paving, concrete slab, concrete walk or structure.

F. Bedding: Layer placed over the excavated subgrade in a trench before laying pipe.

G. Utilities include on-site underground pipes, conduits, ducts, and cables, as well as underground services within building.

2.01 BACKFILL

A. Bedding and Initial Backfill - Naturally or artificially graded mixture of natural or crushed gravel, crushed stone, and natural or crushed sand; ASTM D 2940; except with 100 percent passing a ½- inch (25 mm) sieve and not more than 8 percent passing a No. 200 (0.075 mm) sieve.

B. Subsequent Backfill - excavated material free from rock larger than three inches in greatest dimension, clods, and debris.

2.03 SUBBASE

A. Naturally or artificially graded mixture or natural or crushed gravel, crushed stone, and natural or crushed sand; ASTM D 2940; with at least 90 percent passing a 1-1/2 – inch (38 mm) sieve and not more than 12 percent passing a No. 200 (0.075 mm) sieve.

2.02 IDENTIFICATION TAPE

A. Detectable Warning Tape: Acid- and alkali-resistant polyethylene film warning tape manufactured for marking and identifying underground utilities, minimum 3 inches (75 mm) wide and 4 mils (0.1 mm) thick, continuously inscribed with a description of utility, with metallic core encased in a protective jacket for corrosion protection, detectable by metal detector when tape is buried up to 30 inches (750 mm) deep;

colored as follows:

Red: Electric.

Yellow: Gas, oil, steam, and dangerous materials.

Orange: Telephone and other communications.

Blue: Water systems.

Green: Sewer systems.

PART 3 – EXECUTION

3.01 PROTECTION

A. The Contractor shall take all precautions to assure that water does not accumulate in trenches while utility lines are being constructed.

B. Any pipe damaged by backfill operations shall be replaced by new pipe.

3.02 EXCAVATION

A. Trenches shall be excavated through any or all materials regardless of natural substances.

B. A firm, full-length support shall be formed for all underground pipe.

C. If the bottom of any excavation is taken out beyond the elevations shown on the plans, it shall be refilled at the Contractor's expense with initial backfill material compacted to the density of adjacent undisturbed material.

D. Where the excavated material is rock or other unsatisfactory bedding material, the trench shall be excavated below the final grade of the pipe invert a distance of four inches. The trench shall then be backfilled to the grade of the pipe with initial backfill material.

3.03 BEDDING & BACKFILL

A. Trenches shall be bedded to the proper elevation for installing the pipe with initial backfill material. All backfill material within six inches of pipe shall be initial backfill material.

B. Initial backfill shall be deposited and compacted to a density equal to or greater than that of the existing soils for all piping. Subsequent backfilling shall not be compacted except for areas within roadways, parking or sidewalks.

C. Compaction shall be accomplished by the use of a mechanical vibrating tamper.

D. All trenches not within roadway areas shall be mounded 4 to 6 inches to allow for settlement.

E. Backfilling shall not be performed on any section of pipeline without prior approval by the COR.

F. Areas where utility lines are located within roads or trails shall be dressed and graded to a condition similar to one prior to the installation of the utility. Restore all drainage structures.

SECTION 02720

AGGREGATE BASE

A. This work consists of furnishing and placing aggregate base between backfill and asphalt paving, concrete slab, concrete walk, or structure.

2.01 AGGREGATE

A. Aggregate base course shall be NC DOT approved ABC.

3.01 HANDLING & STORAGE

A. Aggregates shall be handled in such a manner as to minimize segregation.

B. Any method of stockpiling aggregate which allows the stockpile to become contaminated with foreign matter or causes excessive degradation of the aggregate will not be permitted.

3.02 CONSTRUCTION

A. The sub-base shall be completed in accordance with Section 02310 – Earthwork and approved in writing by the COR before placing the base course.

B. The aggregate base course shall be spread in a uniform layer, and to a loose depth that shall have the required thickness when compacted. The aggregate shall be moistened or dried to a uniform moisture content suitable for compaction. The compaction equipment shall be operated over the full width of each layer until visual displacement ceases, but not fewer than three passes.

C. The thickness of the compacted base shall not vary more than 1/2 inch from the required thickness shown on the drawings.

SECTION 02740

HOT BITUMINOUS PAVEMENT

PART 1.GENERAL

A. This work consists of furnishing and constructing all asphalt patching, overlays and new construction as shown on the drawings and specified herein.

1.02 REFERENCES

AASHTO M 156-89 Requirements for Mixing Plants for Hot- Mixed, Hot-Laid Bituminous Paving Mixtures

NCDOTSS North Carolina Department of Transportation Standard Specifications for Roads & Structures

1.03 SUBMITTALS

A. The asphalt mix formula proposed for use by the subcontractor shall be a mix formula that has been previously certified by NC DOT as meeting the requirements of this specification. The subcontractor shall submit a letter of certification from the proposed asphalt mix supplier that verifies the intended formula meets said requirements.

B. The Contractor shall furnish with each shipment 2 copies of a delivery ticket. Both copies shall accompany the shipment and be delivered to the COR at the destination. The delivery ticket shall contain the following information: Delivery ticket number, date shipped, state project or purchase order number, State Laboratory assigned batch number, destination, name of consignee, trailer or car number, supplier's storage tank or batch number, quantity loaded (pounds or gallons), specific gravity or pounds per gallon at 60F., loading temperature, and net gallons at 60F.

C. Certified reports of Inspections and laboratory tests as required by this specification shall be prepared by an independent testing laboratory.

D. In either case no asphalt materials shall be delivered to the job site prior to said certifications being received and/or accepted by the COR.

1.04 QUALITY PROGRAM REQUIREMENTS

A. The asphalt mixing plant shall conform to AASHTO M 156 and the requirements of NCDOTSS , Section 610-5. Prior to the start of paving, a detailed batch plant equipment inspection may be performed to ensure equipment is in compliance with AASHTO M 156.

1.05 STORAGE

A. In no case shall an asphalt mixture be stored overnight for use the next day.

2.01 ASPHALT CEMENT

A. Asphalt cement graded by viscosity shall meet the requirements of AASHTO M226, using the limits shown in Table 2 of M226. The maximum loss on heating requirements shall apply.

2.02 AGGREGATE

A. Aggregate shall meet the requirements of NCDOTSS, Section 1012 – Aggregate for Asphalt Bases & Pavements.

2.03 PRIME COAT

A. Prime coat shall meet the requirements of NCDOTSS, Section 600 – Prime Coat.

2.04 TACK COAT

A. Tack coat shall meet the requirements of NCDOTSS, Section 605 – Asphalt Tack Coat.

2.04 ASPHALTIC CONCRETE - SURFACE COURSE

A. NCDOT Type I-2 shall be used as a surface course and placed over a prepared aggregate base course or existing pavement as shown on the drawings. The composition of this mix shall be as follows:

Sieve Designation Percentage by Weight Passing 3/4 inch 100 1/2 inch 96-100 3/8 inch 85-100 No. 4 67-92 No. 8 55-75 No. 40 45-15 No. 80 22-7 No.200 9-3

B. Asphalt cement shall be 6.0 minimum - 7.2 Maximum Percent of Total Mixture. Hydrated lime shall be one percent (1%) of the total mixture weight. Minimum stability shall be 800 pounds. Air voids shall be 4 -10%.

C. Asphaltic concrete mixtures shall be maintained uniformly throughout the project and shall conform to the tolerances listed below:

Passing No. 4 and larger sieves +/- 7.0% Passing No 8 sieve +/- 5.0% Passing No 40 sieve +/- 5.0% Passing No. 80 sieve +/- 5.0% Passing No 200 sieve +/- 2.0% Asphalt Cement for Surface Courses +/- 0.5% Temperature of Mixing +/- 15 degrees F

D. No job mix formula, with or without tolerances listed, can be outside the extreme range.

E. Hot Laid Asphalt Concrete, when discharged from the mixing plant, shall be between 290 degrees and

540 degrees. In addition, the asphalt cement shall not be heated to above 350 degrees F at any time.

3.01 PROTECTION OF EXISTING STRUCTURES

A. The surfaces of adjacent structures shall be protected from spattering or marring upon application of the tack coat or prime coat.

3.02 AGGREGATE SUBGRADE PREPARATION

A. All areas to receive new asphalt paving shall be graded to ensure continuous drainage.

B. All aggregate bases to receive new asphalt paving shall be treated with a prime coat. Prime coat shall be allowed to thoroughly penetrate the base and shall be maintained in an acceptable condition until the pavement is placed.

C. Prime shall only be applied when the base is sufficiently dry and atmospheric temperature is above 40 degrees Fahrenheit.

3.03 ASPHALT PATCHING AND LEVELING COURSE

A. Where the surface of the existing pavement is irregular, it shall be brought to uniform contour by leveling with an asphalt mixture and thoroughly compacted until it conforms to the surrounding surface. The material for the leveling course shall be NCDOT I-2. A tack coat shall be uniformly applied at a rate of

0.05 to 0.15 gallons per square yard for all areas receiving leveling course.

B. Where tree roots have disturbed the existing pavement, the roots shall be cut and removed. A minimum section of 1’ asphalt shall be removed along the length of the trail and re-leveled.

3.04 TACK COAT

A. Tack coat shall only be applied when the surface is sufficiently dry and atmospheric temperature is above 35 degrees Fahrenheit.

B. Contact surfaces of existing pavement shall have a tack coat uniformly applied at a rate of 0.05 to 0.15 gallons per square yard.

3.05 ASPHALT PAVEMENT

A. Surface Smoothness tolerances shall conform to NCDOTSS, Section 610-13 Surface Requirements.

B. Do not apply asphalt mixtures to a wet or frozen surface or when the air temperature is below 45 degrees F or when weather conditions are otherwise unfavorable. Any exceptions to these restrictions shall require written permission from the COR.

C. The asphalt mixture for the trail shall be spread and finished to the required grades, cross sections, thicknesses, and widths as shown on the drawings. The Contractor may spread, rake, and lute the mixture by hand methods in irregular areas as determined by the COR.

3.06 JOINTS

A. When the laying of the mixture is to be suspended long enough to permit the mixture to become chilled, a transverse joint shall be constructed.

B. A butt joint will be permitted, provided proper compaction is achieved. The joint shall be constructed square to the lane alignment and all excess material shall be discarded.

C. Before paving operations are resumed, the exposed edge of the previously constructed pavement shall be lightly coated with tack coat.

3.06 COMPACTION

A. Asphalt shall be uniformly compacted by rolling before the asphalt has cooled below 185 degrees F.

Compaction equipment shall meet the requirements of NCDOTSS Section 610-10.

B. Asphalt shall be compacted to a density of at least 95% of the laboratory density as determined by the

Marshall method of test.

3.03 TESTING & INSPECTION

A. In-Process Batch Plant Tests

1. Testing of the materials, mixtures and equipment at the batch plant shall be made by the Testing Laboratory as deemed necessary by said laboratory in order to certify compliance with the requirements as stated in this specification.

B. Field Inspection and Testing

1. Verity that all surfaces to receive asphalt materials are clean and free of foreign debris and loose gravel prior to placement of materials.

2. Take samples of the asphalt mixture at the paver for field testing for marshal stability, asphaltic cement content and gradation as determined by the Testing Laboratory.

3. Measure mix temperature of each truckload prior to dumping into paver, to verity that mix temperature meets specified requirements.

4. Check completed pavement surfaces for compliance with the surface smoothness requirements as stated in paragraph 3.03 B. 1 at minimum intervals of 25 feet along the roadway centerline for the entire length of the work.

5. Density shall be determined in accordance with NCDOTSS Section 610-11 – Density Control &

Determination.

SECTION 02920

MULCHING

A. This section covers the mulching of all areas disturbed by construction activities.

A. Mulch shall be straw or hay applied at the rate of two (2) tons per acre.

3.01 APPLICATION

A. Mulching operations shall be carried out in a timely manner following any and all backfill completion as directed by the COR.

B. All disturbed areas to be mulched shall be graded and leveled.

C. Straw or hay shall be uniformly spread over the area at the rate specified.

SECTION 03100

CONCRETE FORMWORK

A. This section covers all concrete formwork, expansion joints, and related accessories.

2.01 FORMS

A. Forms shall be wood, plywood, hardboard, or metal and shall be approved by the COR.

B. Form oil shall be nonstaining type.

2.02 EXPANSION JOINTS

A. Expansion joints shall be ½” pressure treated #2 Southern Yellow Pine.

3.01 FORM CONSTRUCTION

A. Forms shall be built tight, in proper alignment, and adequate to resist the stresses of concrete placement without deformation.

B. Forms shall be constructed to produce the required concrete surface.

3.02 JOINTS

A. Expansion and contraction joints shall be formed as indicated on the drawings.

B. Control joints shall be saw cut at the locations shown on the drawings. Joints shall be 1/5 the depth of the slab.

SECTION 03300

CAST-IN-PLACE CONCRETE

A. This Section includes cast-in-place concrete, including reinforcement, concrete materials, mix design, and placement procedures.

1.02 REFERENCES

A. The latest editions of the following specifications and recommended practices shall govern:

ACI 301 - Specifications for Structural Concrete for Buildings ACI 306 - Recommended Practice for Winter Concrete ACI 305 - Recommended Practice for Hot Weather Concrete

1.03 SUBMITTALS

A. Product Data: For each manufactured material and product indicated.

B. Design Mixes: For each concrete mix indicated.

2.01 CONCRETE MATERIALS

A. Aggregate shall conform to the requirements of AASHTO M6 and AASHTO M80, and shall be well graded from fine to coarse within designated limits.

B. Portland Cement shall comply with ASTM C150, Type 1. Supplier shall provide mill certification of compliance with specification.

C. Water shall be clean, fresh, and free from injurious amounts of minerals or foreign substances.

D. Additives or air entrainment agents shall comply with ASTM C 260.

E. Synthetic Fiber: Fibrillated or monofilament polypropylene fibers engineered and designed for use in concrete, complying with ASTM C 1116, Type III, 1/2 to 1-1/2 inches (13 to 38 mm) long.

F. All concrete shall have a minimum "compressive strength" of 3500 psi at 28 days. Concrete shall be air-entrained and shall contain not less than 3% and not more than 6% entrained air determined by test procedure ASTM C-138. The design of the concrete mixture shall be the responsibility of the contractor.

3.01 PREPARATION

A. The subgrade and all formwork shall be inspected and approved by the COR prior to work beginning.

B. The Contractor shall give the COR a minimum of 24 hours written notice before placing concrete.

3.02 PLACING CONCRETE

A. "Ready-Mixed Concrete" may be employed if the time interval between mixing at the plant and discharge into the form does not exceed 1-1/2 hours. The batch ticket shall show the time the mix was batched.

B. All concrete shall be placed within 1-1/2 hours from the time of mixing. No concrete shall be placed after it has started its initial set or with a temperature above 90 degrees F.

C. Concrete shall be placed in such a manner as to avoid segregation of the mixture. Concrete shall be spread in horizontal layers when practicable and shall not be freely dropped more than five (5) feet.

Depositing a large quantity of concrete and flowing or working it along the forms will not be permitted.

D. Mechanical vibrators shall be used for consolidation of concrete. Concrete shall be consolidated within 15 minutes after placement. A minimum of two vibrators, in working order, shall be on the job during concrete placement. If consolidation of concrete with mechanical vibrators is impractical, hand tamping, rodding, and spading shall be permitted.

E. Concrete plant standards and truck mixer and agitator standards shall be as recommended by the

National Ready Mix Association.

F. The Contractor is responsible for making and testing cylinders from the concrete being incorporated in the project. Slump testing will be performed by the Contractor in accordance with ASTM Standard Method C143. Slump shall not exceed 3" for vibrated concrete.

G. Finishing and curing shall be in accordance with Section 03360 – Concrete Finishing.

3.03 WEATHER LIMITATIONS

A. Cold weather concreting shall meet the requirements of ACI 306R-99.

B. Hot weather concreting shall meet the requirements of ACI 305R-99.

3.04 SAMPLING & TESTING

A. Sampling and testing shall be the responsibility of the Contractor, through an approved testing laboratory.

The Contractor shall test for strength, air content and slump.

B. Sampling and testing shall be done in accordance with the following test methods:

Sampling Fresh Concrete AASHTO T-141 Making and Curing Concrete Compression Test Specimens AASHTO T-23 Compressive Strength of Concrete Cylinders AASHTO T-22 Percent Entrained Air (Pressure Method) AASHTO T-152 Consistency (Slump) of Concrete AASHTO T-119

C. Testing frequency shall be one sample or test per every 10 CY or truck load.

D. Test results shall be submitted in writing to the COR.

SECTION 03360

CONCRETE FINISHING

A. This section covers the requirements for finishing, including coloring and imprinting, and curing concrete as shown on the drawings and specified.

2.01 COLOR & IMPRINTING

A. Coloring shall be added only as necessary to match adjacent existing concrete color.

B. Coloring shall be BOMANITE Color Hardener, Heavy Duty Grade, or approved equal. Color samples shall be submitted to the COR for final approval.

2.02 CURING & SEALING

A. Begin curing after finishing concrete, but not before free water has disappeared from concrete surface.

B. Cure formed and unformed concrete for at least seven days as follows:

1. Moisture-Retaining-Cover Curing: Cover concrete surfaces with moisture-retaining cover for curing concrete, placed in widest practicable width, with sides and ends lapped at least 12 inches (300 mm), and sealed by waterproof tape or adhesive. Immediately repair any holes or tears during curing period using cover material and waterproof tape.

2. Curing Compound: Apply uniformly in continuous operation by power spray or roller according to manufacturer's written instructions. Recoat areas subjected to heavy rainfall within three hours after initial application. Maintain continuity of coating and repair damage during curing period.

A. The concrete shall be placed and screeded to the finished grade and floated to a uniform surface using standard finishing techniques.

B. BOMANITE Color Hardener shall be applied evenly to the surface of the fresh concrete by the dry-shake method using a minimum of 60 pounds per 100 square feet. It shall be applied in two or more shakes, floated after each shake and troweled only after the final floating.

C. BOMANITE Cure and Seal, or approved equal, shall be applied in accordance with the manufacturer's recommendations immediately after final floating.

SECTION 03370

CONCRETE FROM PACKAGED DRY MIX FOR MINOR STRUCTURES

A. This section covers requirements for constructing small concrete structures requiring one-half cubic yard or less.

A. The prebagged concrete mix shall be made using a dry preportioned blended mix meeting the requirements of ASTM C-387 for 28 days, 3,500 psi concrete.

B. Water shall be clean and free from alkali and other deleterious materials. Water shall be added to each bag as recommended by the manufacturer.

C. Forms shall be plywood, hardboard, wood, metal or other approved material to yield the required finish.

3.01 PROJECT SITE MIXING

A. Measure, batch, and mix concrete materials and concrete according to ASTM C 94. Mix concrete materials in appropriate drum-type batch machine mixer.

1. For mixer capacity of 1 cu. yd. (0.76 cu. m) or smaller, continue mixing at least 1-1/2 minutes, but not more than 5 minutes after ingredients are in mixer, before any part of batch is released.

2. For mixer capacity larger than 1 cu. yd. (0.76 cu. m), increase mixing time by 15 seconds for each additional 1 cu. yd. (0.76 cu. m).

B. Provide batch ticket for each batch discharged and used in the Work, indicating Project identification name and number, date, mix type, mix time, quantity, and amount of water added. Record approximate location of final deposit in structure.

3.02 CONSTUCTION

A. The fresh concrete shall be placed in the forms and rodded as necessary to remove the air pockets. The exposed surfaces of the concrete shall receive a medium trowel finish.

B. The Contractor shall ensure that the air surrounding the fresh concrete be kept at a temperature above 50 degrees F for a period of five days after the concrete is placed.

C. Specifications for curing of cast-in-place concrete shall also apply to concrete from packaged dry mix.

SECTION 15100

VALVES & VALVE BOXES

A. This work includes furnishing and installing all valves and associated fittings at the locations shown on the drawings.

2.01 VALVES

A. All valves shall be designed to a minimum working pressure of 200 psi.

B. Curb Valves: 1 1/2“ curb valves for yard hydrants, eye wash station and branch lines shall be Model H- 10283N MARK II Oriseal by Mueller Co, or approved equal.

C. 2” Gate valves shall be Model A-2360 resilient wedge gate valve with 2” square operating nut by Mueller Co, or approved equal.

D. Gate valves 3” and larger gate valves shall be Model A-2361 resilient wedge gate valve with 2” square operating nut by Mueller Co, or approved equal.

2.02 VALVE BOXES

A. Valve boxes shall be provided for all valves installed below grade. All valve boxes shall be cast iron screw type with a base to fir the valve yoke with a removable cover and the word “water” cast thereon.

B. Curb valve boxes: Tyler Union Model 6500 Screw Type, or approved equal.

C. Gate valve boxes: Tyler Union Model Model 6860 Screw Type, or approved equal.

3.01 INSTALLATION

A. Install valves at locations and to the details shown on the drawings.

B. Install valve boxes with all buried valves as shown on the drawings.

SECTION 15200

HYDRANTS & EYE WASH STATIONS

PART 1 – GENERAL

1.01 WORK INCLUDED

A. This section includes furnishing and installing yard hydrants and safety stations with eye wash.

2.01 YARD HYDRANTS

A. Yard hydrants shall be Model U150W freeze-proof utility yard hydrants with a wheel handle by Woodford or approved equal.

2.02 EYE WASH STATIONS

A. Eye wash stations shall be Model G1941 (Safety Station with Eye Wash, Freeze Protection Valve), green power coated, by Guardian Equipment, or approved equal.

3.02 INSTALLATION

A. Install all fixtures to the details shown on the drawings and in accordance with manufacturer’s recommendations.

SECTION 15213

WATERLINES

A. This work includes furnishing and installing buried waterlines as shown on the drawings.

2.01 PIPE

A. Plastic pipe, 2 inch diameter and larger, shall be polyvinyl chloride (PVC) SDR 21-200 psi gasket joints.

Pipe shall be stamped with NSF seal.

B. Plastic pipe 1-1/2 inch diameter and smaller shall be SCH. 40 PVC glued joints, or high density polyethylene water pipe, HDPE, at the Contractors option.

2.02 FITTINGS

A. Fittings shall be of the same type and manufacture as the pipe being jointed.

B. All plastic fittings requiring threading shall be Schedule 80 PVC, female threads.

2.03 UNDERGROUND DETECTION AND MARKING TAPE

A. Section 02315.

2.04 TAPPING SLEEVE

A. Tapping sleeves shall consist of 18-8 type 304 Stainless Steel full circumference band. The flanges shall meet AWWA C207 Class D, ANSI 150# drilling, recessed for tapping valve, fusion bonded. Gasket shall be Nitrile (Buna-N) NSF 61 compounded to resist water at temperatures up to 180ºF.

B. Bolts and nuts shall be 18-8 type 304 stainless steel heavy hex nuts stud bolts & washers. Nuts and studs shall be coated to prevent galling.

C. The sleeves shall have flanged outlets which will accommodate the tapping valves. Valves will be identical to resilient wedge gate valves elsewhere specified with outlet end adaptable to the tapping machine and to provide mechanical joint connections to discharge pipes.

D. Tapping Sleeve shall be Smith Blair or Ford.

A. Pipe and fittings shall be installed in accordance with the manufacturer's installation guide for the type being installed and as shown on the drawings.

B. Waterlines shall be buried a minimum of 30” deep.