Attachment_A_Technical_Specifications_-_Winding_Woods_Water_Sewer_Phase_2.pdf

TECHNICAL SPECIFICATIONS

FOR

WATER AND SEWER EXTENSION

FOR

WINDING WOODS COMMERCE PARK –

PHASE 2

PREPARED FOR:

DORCHESTER COUNTY ECONOMIC

DEVELOPMENT

J – #26087.0009

DATE:

AUGUST 2026

thomasandhutton.com

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TABLE OF CONTENTS

TECHNICAL PROVISIONS

02110 Site Clearing 02110–1 – 02110–4

02111 Site Preparation 02111–1 – 02111–2

02210 Soil Erosion Control 02210–1 – 02210–6

02310 Jack & Bore 02310-1 – 02310-4

02570 Traffic Control 02570–1 – 02570–3

02667SC Water Distribution System 02667SC–1 – 02667SC–24

02731 Wastewater Collection System 02731–1 – 02731–25

02902 Grassing 02902–1 – 02902–6

APPENDICES

Dorchester County Water & Sewer Specifications

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INDEX TO

SECTION 02110 – SITE CLEARING

Paragraph Title Page

PART 1 – GENERAL

1.1 Section Includes 02110–1

1.2 Related Sections 02110–1

1.3 Measurement and Payment 02110–1

1.4 Regulatory Requirements 02110–1

PART 2 – PRODUCTS

2.1 Materials 02110–1

PART 3 – EXECUTION

3.1 Preparation 02110–2

3.2 Protection (Omitted) 02110–2

3.3 Clearing 02110–3

3.4 Removal 02110–3

3.5 Disposal 02110–3

3.6 Grubbing 02110–4

02110–1

SECTION 02110

SITE CLEARING

1.1 SECTION INCLUDES

A. Removal of surface debris.

B. Removal of trees, shrubs, and other plant life.

C. Topsoil excavation.

1.2 RELATED SECTIONS

A. Section 02204 – Earthwork

1.3 MEASUREMENT AND PAYMENT

A. Site Clearing: Clearing, grubbing and other items to be removed will be included in the lump sum price in the proposal for clearing work. Includes clearing site, removing stumps, loading and removing waste materials from site.

1.4 REGULATORY REQUIREMENTS

A. Coordinate clearing Work with utility companies.

2.1 MATERIALS

A. Provide tree protection materials as detailed on the construction drawings.

3.1 PREPARATION

A. Verify existing plant life designated to remain is tagged or identified.

B. Identify a waste area for placing removed materials.

3.2 PROTECTION:

OMITTED

3.3 CLEARING

02110–2

A. Clear areas required for access to site and execution of work. Clearing shall consist of felling and cutting trees into sections, and satisfactory disposal of trees and other vegetation designated for removal, including downed timber, snags, brush, and rubbish occurring within area to be cleared. Trees, stumps, roots, brush, and other vegetation in areas to be cleared shall be [burned or] removed completely from the site, except such trees and vegetation as may be indicated or directed to be left standing. Trees designated to be left standing within cleared areas shall be trimmed of dead branches 1–1/2 inch or more in diameter.

Limbs and branches to be trimmed shall be neatly cut close to the trunk of the tree or main branches. Cuts more than 1–1/2 inches in diameter shall be painted with an accepted treewound paint. Trees and vegetation to be left standing shall be protected from damage incident to clearing, grubbing, and construction operations, by the erection of timber barriers or by such other means as circumstances require. Such barriers must be placed and be checked by the

OWNER before construction observations can proceed (See 3.2). Clearing shall also include removal and disposal of structures obtruding, encroaching upon, or otherwise obstructing the work.

3.4 REMOVAL

A. Where indicated or directed, trees and stumps shall be removed from areas outside those areas designated for clearing and grubbing. Work shall include felling of such trees and removal of their stumps and roots. Trees shall be disposed of as hereinafter specified.

B. Remove debris, rock, and other extracted plant life from site.

3.5 DISPOSAL

A. Disposal of trees, branches, snags, brush, stumps, etc., resulting from clearing and grubbing shall be the Contractor’s responsibility and shall be disposed of by burning, removal from site, or a combination of both. All costs in connection with disposing of materials will be at the Contractor’s expense. Material disposed of by burning shall be burned in a manner avoiding all hazards, such as damage to existing structures, construction in progress, trees, and vegetation. Contractor shall be responsible for compliance with all local and State laws and regulations relative to the building of fires. Disposal by burning shall be kept under constant attendance until fires have burned out or extinguished. All liability of any nature resulting from disposal of cleared and grubbed material shall become the

Contractor’s responsibility. Disposal of all materials cleared and grubbed will be in accordance with rules and regulations of the State of South Carolina. No material will be burned unless directed to do so by the OWNER. Contractor shall obtain a permit to burn on site from local fire department, before beginning the work.

3.6 GRUBBING

A. Grubbing shall consist of removal and disposal of stumps, roots larger than one inch in diameter, and matted roots from designated grubbing areas. This material, together with logs and other organic or metallic debris not suitable for building of pavement

02110–3 subgrade or building pads, shall be excavated and removed to a depth of not less than 18 inches below original surface level of the ground in embankment areas and not less than 2 feet below finished earth surface in excavated areas. Depressions made by grubbing shall be filled with suitable material and compacted to make the surface conform to original adjacent ground.

END OF SECTION

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SECTION 02111 – SITE PREPARATION

1.1 Summary 02111-1

1.2 Related Requirements 02111-1

1.3 Protections 02111-1

Not Used

3.1 Clearing or Removal of Trees and Other Vegetation 02111-2

02111-1

SECTION 02111

SITE PREPARATION

Paragraph

1.1 SUMMARY

A. Section Includes:

1. Protection or removal of trees and other vegetation.

2. Topsoil stripping.

3. Clearing and grubbing.

4. Erosion control.

1.2 RELATED REQUIREMENTS

A. Construction Drawings

1.3 PROTECTIONS

A. Provide protection necessary to prevent damage to existing improvements, trees, or vegetation indicated on the Contract Documents to remain.

B. Protect improvements on adjoining properties and on Owner’s property.

C. Restore damaged improvements to original condition as acceptable to parties having jurisdiction.

D. Conduct operations to ensure minimum interference with roads, streets, walks, and other adjacent occupied or used facilities. Do not close or obstruct streets, walks, or other occupied or used facilities without permission from authorities having jurisdiction and from Owner. Streets and roadways shall be thoroughly cleaned and/or swept on a daily basis or more frequently as required by the governing authority.

E. Provide traffic control as required, in accordance with the U.S. Department of

Transportation “Manual of Uniform Traffic Control Devices” and the state highway department requirements.

F. Provide necessary erosion control measures to prevent siltation of existing pavement or storm drainage facilities to remain.

Not Used

02111-2

3.1 CLEARING AND REMOVAL OF TREES AND OTHER VEGETATION

A. Unless otherwise indicated on the drawings, remove trees, shrubs, grass, other vegetation, improvements, or obstructions interfering with installation of new construction within the limits of work. Removal includes digging out stumps and roots. Do not remove items elsewhere on site or premises unless specifically indicated.

B. Strip topsoil to whatever depths encountered to prevent intermingling with underlying subsoil or other objectionable material. Cut heavy growths of grass from areas before stripping. Topsoil shall consist of sandy clay surficial soil found in depth of not less than 6 inches. Satisfactory topsoil is reasonably free of subsoil, clay lumps, stones and other objects over 2 inches in diameter, weeds, roots, and other objectionable material.

C. Stockpile topsoil in storage piles in areas shown or where directed. Construct storage piles to freely drain surface water. Cover storage piles if required to prevent windblown dust. Dispose of unsuitable or excess topsoil same as specified for waste material, unless otherwise specified by Owner.

D. Completely remove stumps, roots, and other debris below proposed subgrade elevation. Fill depressions caused by clearing and grubbing operations with satisfactory soil material, unless further excavation or earthwork is required. Place fill material in horizontal layers not exceeding 8-inches loose depth, and thoroughly compacted per fill requirements of this section.

E. Remove existing above grade and below grade improvements and abandoned underground piping or conduit necessary to permit construction and other work.

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SECTION 02210 – SOIL EROSION CONTROL

1.1 Related Documents 02210–1

1.2 Description of Work 02210–1

1.3 Purposes 02210–1

1.4 Quality Assurance 02210–1

1.5 Submittals 02210–2

1.6 Measurement and Payment 02210–2

2.1 Grassing Materials 02210–3

2.2 Hay Bales 02210–3

2.3 Silt Fence 02210–3

2.4 Chemicals for Dust Control 02210–4

2.5 Rip–Rap 02210–4

2.6 Product Review 02210–4

3.1 General 02210–4

3.2 Grassing 02210–4

3.3 Sediment Barriers 02210–

3.4 Silt Fence 02210–6

3.5 Dust Control 02210–6

3.6 Sediment Basin 02210–6

3.7 Rip–Rap 02210–6

3.8 Construction Exit 02210–6

3.9 Inlet Protection 02210–6

02210–1

SECTION 02210

SOIL EROSION CONTROL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Special

Conditions apply to this section.

1.2 DESCRIPTION OF WORK

A. Extent of soil erosion control work includes all measures necessary to meet the requirements of this section.

Erosion and sediment control measures shall be installed prior to any construction activity.

Soil erosion and sediment control measures shall include all temporary and permanent means of protection and trapping soils of the construction site during land disturbing activity. Activity covered in this contract shall meet standards of

NPDES General Permit for the state where work is performed.

1.3 PURPOSES

A. Contractor is to achieve the following goals:

1. Minimize soil exposure by proper timing of grading and construction.

2. Retain existing vegetation whenever feasible.

3. Vegetate and mulch denuded areas as soon as possible.

4. Divert runoff away from denuded areas.

5. Minimize length and steepness of slopes when it is practical.

6. Reduce runoff velocities with sediment barriers or by increasing roughness with stone.

7. Trap sediment on site.

8. Inspect and maintain erosion control measures.

1.4 QUALITY ASSURANCE

A. Manufacturer's Qualifications: Firms regularly engaged in the manufacture of soil erosion control systems products of types and sizes required, whose materials have been in satisfactory use for not less than 5 years.

02210–2

B. Codes and Standards: Comply with all applicable Local, State, and Federal

Standards pertaining to soil erosion control.

1.5 SUBMITTALS

A. Product Data: Submit manufacturer's technical product data and installation instruction for soil erosion control materials and products.

1.6 MEASUREMENT AND PAYMENT

A. Grassing – Payment for permanent or temporary grassing will be made at the contract unit price. Payment shall include all equipment, labor, materials, and maintenance necessary to establish a stand of grass.

B. Silt Fence – Payment will be made at the contract unit price. Payment shall include all equipment, labor, materials, and maintenance necessary to install and keep silt fence functioning properly.

C. Ditch Check – Payment will be made at the contract unit price. Payment shall keep ditch check functioning properly.

D. Rip–Rap – Payment will be made at the contract unit price. Payment shall include all equipment, labor, materials, and maintenance necessary to install rip– rap per the construction drawings.

E. Construction Exit – Payment will be made at the contract unit price. Payment shall include all equipment, labor, materials, and maintenance necessary to install and keep construction exit functioning properly.

F. Inlet Protection – Payment will be made at the contract unit price. Payment shall keep inlet protection functioning properly.

G. Dust Control – There will be no separate payment for dust control. Any costs connected thereto shall be a subsidiary responsibility of the Contractor.

2.1 GRASSING MATERIALS

A. Refer to Section 02902 – Grassing.

1. General: All grass seed shall be free from noxious weeds, grade A recent crop, recleaned and treated with appropriate fungicide at time of mixture. Deliver to site in original sealed containers with dealer's guarantee as to year grown, percentage of purity, percentage of germination and date of the test by which percentages of purity and germination were determined. All seed sown shall have a date of test within six months of the date of sowing.

02210–3

2. Type of Seed: Either Annual Rye or Common Bermuda Grass seed will be used depending on time of year in which seeding is to occur.

3. Mulch: Straw.

4. Fertilizer: Commercial balanced 4–12–12 fertilizer.

2.2 HAY BALES:

OMITTED

2.3 SILT FENCE

A. Silt fence shall be a woven geotextile fabric sheet. Fabric shall be a synthetic polymer composed of at least 85% by weight propylene, ethylene, amide, ester, or vinylidene chloride, and shall contain stabilizer and/or inhibitors added to the base plastic to make filaments resistant to deterioration due to ultra–violet and/or heat exposure. Fabric should be finished so the filaments will retain their relative position with respect to each other. Fabric shall be free of defects, rips, holes, or flaws.

Fabric shall meet the following requirements:

Woven Fabrics

Grab Strength 90 lbs.

Burst Strength 175 PSI

UV Resistance 80%

2.4 CHEMICALS FOR DUST CONTROL

A. Calcium Chloride, Anionic Asphalt Emulsion, latex Emulsion or Resin–in–Water

Emulsion may be used for dust control.

2.5 RIP–RAP

A. Shall be hard quarry or field stone of such quality the pieces will not disintegrate on exposure to water, sunlight, or weather. Stone shall range in weight from a minimum of 25 pounds to a maximum of 125 pounds. At least 50 percent of the stone shall weigh more than 60 pounds. The stone shall have a minimum dimension of 12 inches.

2.6 PRODUCT REVIEW

A. Contractor shall provide the Engineer with a complete description of all products before ordering. Engineer will review all products before they are ordered.

02210–4

3.1 GENERAL

A. All disturbed soil areas except those to support paving shall be graded and protected from erosion by grassing. Disturbed areas must be grassed within 14 days of work ending unless work is to begin again before 21 days. Storm water conveyance systems shall have sediment barriers installed at all entrances, intersections, change in direction and discharge points.

3.2 GRASSING

A. Refer to Section 02902 – Grassing.

3.3 SEDIMENT BARRIERS

A. Hay Bales for Sheet Flow Applications:

1. Excavate a 4 inch deep trench the width of a bale and length of proposed barrier. Barrier should be parallel to the slope. Place barrier 5 to

6 feet away from toe of slope, unless otherwise instructed.

2. Place bales in the trench with their ends tightly abutting. Corner abutment is not acceptable. A tight fit is important to prevent sediment from escaping through spaces between the bales.

3. Backfill the trench with previously excavated soil and compact it. Backfill soil should conform to ground level on downhill side of barrier and should be built up to 4 inches above ground on uphill side of bales.

4. Inspect and repair or replace damaged bales promptly. Remove hay bales when uphill sloped areas have been permanently stabilized.

B. Rock Ditch Check

1. Excavate a 6 inch deep trench the width and length of proposed barrier.

Install a non–woven geotextile fabric in the trench before placing rock for the ditch check.

2. The body of the ditch check shall be constructed of 12 inch rip–rap. The upstream face may be covered with 1–inch washed stone.

3. Ditch checks shall not exceed a height of 2 feet at centerline of the channel and have a minimum top flow length of 2 feet.

4. Rip–rap shall be placed over the channel banks to prevent water from flowing around ditch check. Rock must be installed by hand or mechanical placement (no dumping of rock) to achieve complete coverage of the ditch and ensure the center of the check is lower than the edges.

02210–5

5. The maximum spacing between ditch checks shall be where the toe of the upstream check is at the same elevation as the top of the downstream check.

6. Contractor shall maintain ditch checks as required by State regulations.

3.4 SILT FENCE

A. Silt fence shall be placed at approximate location shown and installed in accordance with the detail on the construction drawings. Contractor shall maintain silt fence as required by state regulations.

3.5 DUST CONTROL

A. Dust raised from vehicular traffic will be controlled by wetting down access road with water or by the use of a deliquescent chemical, such as calcium chloride, if relative humidity is over 30%. Chemicals shall be applied in accordance with manufacturer's recommendations.

B. Contractor shall use all means necessary to control dust on and near the work, or off–site borrow areas when dust is caused by operations during performance of work or if resulting from the condition in which any subcontractor leaves the site.

Contractor shall thoroughly treat all surfaces required to prevent dust from being a nuisance to the public, neighbors, and concurrent performance of work on site.

3.6 SEDIMENT BASIN

A. A sediment basin equal in volume to 3,600 cubic feet per disturbed acre is required. The sediment basin/lagoon adjacent to the outfall for the site shall be constructed and stabilized prior to any additional land disturbed activity.

3.7 RIP–RAP

A. Rip–Rap shall be placed at the locations shown and installed in accordance with the detail on the construction drawings.

3.8 CONSTRUCTION EXIT

A. Construct exit at the location shown per detail on the construction drawings.

Contractor shall maintain construction exit as required by state regulations.

3.9 INLET PROTECTION

A. Install inlet protection per detail on the construction drawings. Contractor shall maintain inlet protection as required by state regulations until all disturbed surfaces are stabilized.

SECTION 02310 – JACK AND BORE

1.1 Section Description 02310–1

2.1 Casing Pipe Materials and Installation 02310–1

Minimum Steel Pipe Casing Dimensions 02310–2

2.2 Carrier Pipes 02310–3

2.3 Casing Insulators 02310–3

3.1 Installation 02310–4

02310 – 1

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SECTION 02310

JACK AND BORE

1.1 SECTION DESCRIPTION

A. This section includes materials, performance and installation standards, and

Contractor responsibilities associated with the furnishing of all labor, materials, equipment and incidentals required to install, complete required boring and jacking installations, or other trenchless methods for pipelines, as shown on the

Drawings and as specified herein.

B. The provision of this section shall be the minimum standards for the installation of casing pipe by the boring and jacking method. Other types of trenchless methods may be acceptable and encouraged if the specific method is at least equal to the performance of typical jack and bores and is comparable in cost.

C. Payment for Jack & Bore will be made under the lump sum price for miscellaneous piping and fittings. Payment will include excavation, dewatering, backfilling, compaction, testing, and all equipment, labor and materials necessary to complete the work.

2.1 CASING PIPE MATERIALS AND INSTALLATION

A. Casing shall be steel pipe conforming to the requirements of ASTM Designation A–

139. The minimum casing pipe size and wall thickness shall be as shown herein.

For sizes not included, or for special design considerations, approval shall be obtained from the Engineer of Record. The BCWS Standards shall have precedence if there is a conflict with these specifications.

B. For crossing of state roads, casing materials and installation shall conform to

SCDOT Standards, latest edition, or as minimum shall comply with the following table (see next page):

02310 – 2

Minimum Steel Pipe Casing Dimensions for D.I.P. & PVC

Carrier Steel Casing

Highway & DOT

Bores

Highway & DOT

Bores Railroad Bores

Pipe Pipe Size < 200 L.F. > 200 L.F.

I.D.

(Nom.) Pressure Gravity

Minimum

Wall Weight

Minimum

Wall Weight

Minimum Wall

Thickness (in) Weight

System System

Thickness

(in) Class

Thickness

(in) Class Pressure Gravity Class

4 12 16 0.375 STD 0.500 XS 0.500 0.500 XS

6 16 20 0.375 STD 0.500 XS 0.500 0.500 XS

8 18 24 0.375 STD 0.500 XS 0.500 0.500 XS

10 20 24 0.375 STD 0.500 XS 0.500 0.500 XS

12 24 30 0.375 STD 0.500 XS 0.500 0.500 XS

16 30 36 0.375 STD 0.500 XS 0.500 0.532 XS

18 36 48 0.375 STD 0.500 XS 0.532 0.688 XS

24 38 48 0.375 STD 0.500 XS 0.532 0.688 XS

30 48 54 0.375 STD 0.500 XS 0.688 0.781 XS

36 54 60 0.375 STD 0.500 XS 0.781 0.844 XS

02310 – 3

Minimum Steel Pipe Casing Dimensions for Fusible PVC

Carrier Steel Casing

Highway & DOT

Bores

Highway & DOT

Bores Railroad Bores

Pipe Pipe Size < 200 L.F. > 200 L.F.

I.D.

(Nom.) Pressure Gravity

Minimum

Wall Weight

Minimum

Wall Weight

Minimum Wall

Thickness (in) Weight

System System

Thickness

(in) Class

Thickness

(in) Class Pressure Gravity Class

4 8 16 0.375 STD 0.500 XS 0.500 0.500 XS

6 10 20 0.375 STD 0.500 XS 0.500 0.500 XS

8 12 24 0.375 STD 0.500 XS 0.500 0.500 XS

10 16 24 0.375 STD 0.500 XS 0.500 0.500 XS

12 16 30 0.375 STD 0.500 XS 0.500 0.500 XS

16 20 36 0.375 STD 0.500 XS 0.500 0.532 XS

18 24 48 0.375 STD 0.500 XS 0.532 0.688 XS

24 30 48 0.375 STD 0.500 XS 0.532 0.688 XS

30 36 54 0.375 STD 0.500 XS 0.688 0.781 XS

36 42 60 0.375 STD 0.500 XS 0.781 0.844 XS

2.2 CARRIER PIPES

A. Wastewater and water carrier pipes to be installed within the specified casings shall be equipped with restrained joint connections. Pipe and fittings shall comply with the applicable provisions of these Standards, with minimum Ductile Iron Pipe Class 51.

2.3 CASING INSULATORS

A. Non–corrosive casing insulators shall be used. The casing runner height shall be large enough so that it does not interfere with the pipe–restrained joints. Stainless steel nuts and bolts shall be used. Installation and spacing of casing insulators shall be as required by the manufacturer.

02310 – 4

3.1 INSTALLATION

A. Casing pipes crossing under roadways/railroads shall be located at suitable approved alignments in order to eliminate possible conflict with existing or future utilities and structures, with a minimum 36–inch depth of cover between the top of the casing pipe and the surface of the roadway. For casing pipe crossings under roadways/railroads, the Contractor shall comply with the regulations of said authority in regard to design, specifications, and construction. Casing installations shall be as specified in the State of South Carolina Department of Transportation, “Utility

Accommodation Guide”, and for railroads the American Railway Engineering

Association.

B. The boring and jacking operations shall be done simultaneously, with continuous installation, until the casing pipe is in final position. Correct line and grade shall be carefully maintained. Add–on sections of casing pipe shall be full–ring welded to the preceding length, developing watertight total pipe strength joints. The casing installation shall produce no upheaval, settlement, cracking, movement, or distortion of the existing roadbed or other facilities. Following placement of the carrier pipe within the steel casing, end link seals are to be installed at each open end. Said end link seals shall be suitable for restraining the external earth load, while allowing internal drainage.

C. Casing pipe holes shall be mechanically bored through the soil by a cutting head on a continuous auger mounted inside the pipe. The distance between the leading end of the first auger section and the leading end of the casing shall be as necessary to maintain a solid plug of spoil material inside the forward portion of the casing.

D. The casing pipe shall be adequately protected to prevent crushing or other damage under jacking pressures. Backstops shall be provided for adequately distributing the jack thrust without causing deformation of the soil or other damage. Should the casing pipe be damaged, such damaged portion not in the hole shall be replaced;

however, if installed, the encasement pipe shall be abandoned in place, grouted full, and suitably plugged, and an alternate installation made. An alternate installation will also be required if the casing alignment or elevation substantially deviates from the plan locations, and results in the installation being unusable, as determined by the Project Engineer.

E. Required boring and jacking pits or shafts shall be excavated and maintained to the minimum dimensions necessary to perform the operation. Said excavations shall be adequately barricaded, sheeted, braced and dewatered as required. Boring and jacking pits will normally be no closer than five (5) feet from the edge of pavement, with the permitting agency having final determination of the required setback distance.

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SECTION 02570 – TRAFFIC CONTROL

1.1 Description 02570–1

1.2 Related Work 02570–1

1.3 Responsibility 02570–1

1.4 Measurement and Payment 02570–1

2.1 Materials 02570–1

3.1 Erection 02570–2

3.2 Delays to Traffic 02570–2

3.3 Temporary Traffic Lanes 02570–2

3.4 Signs and Barricades 02570–2

02570–1

SECTION 02570

TRAFFIC CONTROL

1.1 DESCRIPTION

A. This section covers furnishing, installation, and maintenance of all traffic control devices, portable signal equipment, warning signs, and temporary traffic lanes used during construction of the project.

1.2 RELATED WORK

A. Section 02731 – Wastewater Collection System

B. Section 02667 – Water Distribution System

1.3 RESPONSIBILITY

A. The Contractor shall furnish, install, and maintain all necessary automated signals, barricades, concrete traffic barriers, warning signs, traffic barriers, traffic lanes, and other protective devices. Ownership of these temporary warning devices shall remain with the Contractor provided devices are removed promptly after completion and acceptance of work to which devices pertain. If such warning devices are left in place for more than thirty (30) days after specified time for removal, Owner shall have the right to remove such devices and to claim possession thereof.

1.4 MEASUREMENT AND PAYMENT

A. There will be no measurement for this item. Payment shall be subsidiary to the contract price.

2.1 MATERIALS

A. All barricades signs, and traffic control signal devices shall conform to requirements of the current South Carolina Manual on Uniform Traffic Control Devices except as may be modified in these project specifications.

B. Portable traffic control signal devices, barricades, signs and other Control Devices shall be either new or in acceptable condition when first erected on Project and shall remain in acceptable condition throughout the construction period.

B. All signs shall have a black legend and border on an orange reflectorized background and will be a minimum of engineering grade reflective.

02570–2

3.1 ERECTION

A. Prior to commencement of any actual construction on the project, Contractor shall erect appropriate advance warning signs and place concrete traffic barriers where necessary. Subsequently, as construction progresses and shifts from one side of road to the other, temporary lanes must be installed to provide continuous two-way traffic and bike thoroughfare. All appropriate signs and traffic control devices pertinent to the work shall be erected ahead of construction site to advise and warn travelling public of activity and any necessary detours.

3.2 DELAYS TO TRAFFIC

A. Except in rare and unusual circumstances, two–way traffic shall be maintained at all times by temporary and/or permanent roads. There are to be no traffic delays during the hours between 7 AM – 10 AM and 4 PM – 10 PM. Between the hours of 10

AM and 4 PM the maximum delay is to be 15–minutes.

B. When traffic is halted temporarily due to transition procedures including the ingress and egress of construction vehicles, Contractor shall provide necessary flagging personnel with proper equipment and clothing to hold such traffic.

C. If Contractor's proposed traffic control plan involves more than occasional disruption to alternating one way traffic through the work, then temporary, signalized control equipment will be required.

3.3 TEMPORARY TRAFFIC LANES

A. Two–lane traffic shall be maintained at all times unless prior written permission has been given and all necessary flagging personnel and/or signage has been installed.

Temporary lane line stripes shall be applied to the detour paving, as agreed to by

Engineer and Owner's representative. The no–passing double center–line stripes shall be yellow. Such stripes shall be a temporary, degradable, reflectorized tape strip.

All temporary striping shall be maintained throughout the period traffic control is needed.

B. Contractor is responsible for installation and removal of all temporary roads and trails throughout the construction process. These detour roads are to be in accordance with the Pavement Specifications herein.

3.4 SIGNS AND BARRICADES

A. Contractor shall provide a detailed map showing location and verbage of all traffic control signs and methods for the project. All critical warning signs for the project will be a minimum of engineering grade reflective material and include appropriate flashing lights.

02570–3

B. Appropriate Safety Barricades shall be installed between bicycle trails, sidewalks, and the temporary traffic lanes. These barricades shall be impact resistant for passenger vehicles with a travelling speed of 40 mph.

1. Advance warning signs: These signs shall be placed approximately 500 feet in advance of the construction site and detour on each approach to the construction area with subsequent warning signs every 250 feet, until construction site is met.

2. Road Construction Signs: Before and during construction of the detour, advance road construction signs shall be located as already stated above.

The construction site detour lanes will have reflective trestle type barricade with flashing lights spaced a maximum of 25 feet apart to delineate each side of any temporary roadway. Additional signage shall be placed to indicate a reduced speed limit of ten (10) mph for the entire construction area. Other signs as appropriate to a particular activity in the work area shall be erected in advance of that activity.

3. Barricades: While detour is open to traffic, a line of concrete traffic barricades shall be placed across the closed roadway to channelize traffic onto detour. They shall be spaced across the blocked roadway end to end so no vehicle will be able to pass between any two adjacent barricades.

4. Barriers: Shall be wooden having a minimum of 3 horizontal 6-inch rails spaced 20 inches on center. Markings for barrier rails shall be 6 inches wide alternate orange and white reflectorized stripes sloping downward at 45 degrees in the direction traffic is to pass.

During hours of darkness, the Contractor shall place and maintain flashing warning lights on tops of all barriers.

5. Direction Arrow Signs: At each change in traffic direction along the detour, Contractor shall install a sign with an arrow indicating change in traffic direction. This sign is to be located across the pavement from and facing on–coming traffic.

6. End Construction Sign: This sign shall be 60 inches x 24 inches and erected approximately 200 feet beyond end of construction area on the right–hand side.

Z:\26087\26087.0009\Documents\Construction\Bid\Specifications\02667 - Water Distribution System.doc

SECTION 02667 – WATER DISTRIBUTION SYSTEM

1.1 Section Includes 02667–1

1.2 Related Sections 02667–1

1.3 Options 02667–1

1.4 References 02667–1

1.5 Quality Assurance 02667–3

1.6 Requirements of Regulatory Agencies 02667–4

1.7 Product Delivery, Storage & Handling 02667–6

1.8 Sequencing and Scheduling 02667–6

1.9 Alternatives 02667–6

1.10 Guarantee 02667–6

1.11 Existing Utilities 02667–6

1.12 Connect New Main to Existing System 02667–6

1.13 Damage to Existing Water System 02667–7

1.14 Measurement and Payment 02667–7

1.15 Testing 02667–9

2.1 Pipe 02667–10

2.2 Joints 02667–10

2.3 Fittings 02667–11

2.4 Gate Valves 02667–11

2.5 Butterfly Valves 02667–12

2.6 Fire Hydrants 02667–14

2.7 Service Connections 02667–15

2.8 Tapping Sleeves 02667–15

2.9 Curb Stops 02667–15

2.10 Backflow Preventer Assembly 02667–15

2.11 Metal Detector Tape 02667–16

2.12 Tracer Wire 02667–16

2.13 Casing 02667–16

2.14 Casing Spacers 02667–17

2.15 Air Release, Air/Vacuum, and Combination Air Valves 02667–17

2.16 Product Review 02667–17

3.1 On–Site Observation 02667–17

3.2 Installation 02667–18

3.3 Air Release, Air/Vacuum, and Combination Air Valves 02667–21

3.4 Connections of Water Mains 02667–21

3.5 Disinfection 02667–22

3.6 Partial Acceptance of the Work 02667–22

3.7 Grassing 02667–22

3.8 Separation Between Water and Sanitary Sewer 02667–22

3.9 Remove and Replace Pavement 02667–24

3.10 Field Quality Control 02667–24

02667–1

SECTION 02667

WATER DISTRIBUTION SYSTEM

1.1 SECTION INCLUDES

A. Piping

B. Valves

C. Fittings

D. Connect to Existing System

E. All necessary appurtenances to convey potable water from existing system to the location shown on plans.

1.2 RELATED SECTIONS

A. Section 02110 – Site Clearing

B. Section 02902 – Grassing

C. The current edition of Dorchester County’s Water and Sewer Standard

Specifications are included in Appendices A-E. These standards shall take precedence should they conflict with this specification.

1.3 OPTIONS

A. The bid form and specifications describe several pipe materials. Where manufacturers of material or equipment are named in the specifications, Contractor may use equipment or materials of other manufacturers provided they are reviewed and accepted by Engineer as meeting specifications prior to ordering such equipment or materials.

1.4 REFERENCES (LATEST REVISION)

A. ASTM A 53 – Pipe, Steel, Black and Hot–Dipped, Zinc–Coated, Welded and

Seamless.

B. ASTM A 139 – Electric–Fusion (Arc) – Welded Steel Pipe (NPS 4 and Over).

C. ASTM C 443 – Joints for Concrete Pipe and Manholes, Using Rubber Gaskets.

D. ASTM C 478 – Circular Precast Reinforced Concrete Manhole Sections.

E. ASTM D 1557 – Test Methods for Laboratory Compaction Characteristics of Soil

Using Modified Effort.

02667–2

F. ASTM D 1784 – Rigid Poly (Vinyl Chloride) (PVC) Compounds and Chlorinated Poly

(Vinyl Chloride) (CPVC) Compounds.

G. ASTM D 2241 – Poly (Vinyl Chloride) (PVC) Pressure–Rated Pipe (SDR – Series).

H. ASTM D 2737 – Polyethylene (PE) Plastic Tubing.

I. ASTM D 2774 – Underground Installation of Thermoplastic Pressure Piping.

J. ASTM D 3139 – Joints for Plastic Pressure Pipes Using Flexible Elastomeric Seals.

K. ASTM D 3740 – Minimum Requirements for Agencies Engaged in Testing and/or

Inspection of Soil and Rock as Used in Engineering Design and Construction.

L. ASTM D 6938 – In–Place Density and Water Content of Soil and Soil – Aggregate by Nuclear Methods (Shallow Depth).

M. ASTM E 329 – Agencies Engaged in Construction Inspection, Testing, or Special

Inspection.

N. AWWA C 104– Cement–Mortar Lining for Ductile Iron Pipe and Fittings for Water.

O. AWWA C 110 – Ductile–Iron and Gray–Iron Fittings.

P. AWWA C 111– Rubber Gasket Joints for Ductile–Iron Pressure Pipe and Fittings.

Q. AWWA C 115 – Flanged Ductile–Iron Pipe with Ductile–Iron or Gray–Iron Threaded

Flanges.

R. AWWA C 150 – Thickness Design of Ductile Iron Pipe.

S. AWWA C 151 – Ductile Iron Pipe, Centrifugally Cast, for Water.

T. AWWA C 153 – Ductile–Iron Compact Fittings.

U. AWWA C 200 – Steel Water Pipe 6 Inch (150 mm) and Larger.

V. AWWA C 500 – Metal–Seated Gate Valves for Water Supply Service.

W. AWWA C 502 – Dry–Barrel Fire Hydrants.

X. AWWA C 504 – Rubber–Seated Butterfly Valves, 3 inch through 72 inch.

Y. AWWA C 509 – Resilient–Seated Gate Valves for Water Supply Service.

Z. AWWA C 512 – Air Release, Air/Vacuum, and Combination Air Valves for

Waterworks Service.

AA. AWWA C 515 – Reduced–Wall, Resilient–Seated Gate Valves for Water Supply

Service.

BB. AWWA C 600 – Installation of Ductile Iron Water Mains and Their Appurtenances.

02667–3

CC. AWWA C 605 – Underground Installation of Polyvinyl Chloride (PVC) Pressure Pipe and Fittings for Water.

DD. AWWA C 651 – Disinfecting Water Mains.

EE. AWWA C 800 – Underground Service Line Valves and Fittings.

FF. AWWA C 900 – Polyvinyl Chloride (PVC) Pressure Pipe and Fabricated Fittings, 4 inch through 60 inch (100mm Through 300 mm), Water Distribution.

GG. AWWA C 901 – Polyethylene (PE) Pressure Pipe and Tubing, 1/2 inch through 3 inch, for Water Service.

HH. ASME B18.2.1 – Square, Hex, Heavy Hex, and Askew Head Bolts and Hex, Heavy

Hex, Hex Flange, Lobed Head, and Lag Screws (inch series).

II. ASME B18.2.2 – Nuts for General Application: Machine Screw Nuts, Hex, Square, Hex Flange, and Coupling Nuts (inch series).

JJ. NSF/ANSI 61 – Drinking Water System Components – Health Effects.

KK. ASSE 1003 – Performance Requirements for Water Pressure Reducing Valves for

Domestic Water Distribution Systems.

1.5 QUALITY ASSURANCE

A. Materials – Contractor will furnish the Engineer and Owner a description of all material before ordering. Engineer will review the Contractor's submittals and provide in writing an acceptance or rejection of material.

B. Manufacturer – Material and equipment shall be standard products of a manufacturer who has manufactured them for a minimum of 2 years and who provides published data on quality and performance of the products.

C. Subcontractor – A subcontractor for any part of the work must have experience on similar work, and if required, furnish Engineer with a list of projects and Owners or Engineers who are familiar with its competence.

D. Design – If Contractor wishes to furnish devices, equipment, structures, and systems not designed by Engineer, these items shall be designed by either a

Professional Engineer registered in the state of this project, or by someone

Engineer accepts as qualified. If required, complete design calculations and assumptions shall be furnished to the Engineer or Owner before acceptance.

E. Testing Agencies – Soil testing shall be conducted by a testing laboratory that operates in accordance with ASTM D 3740 and E 329 latest revision and be acceptable to the Engineer prior to engagement. Mill certificates of tests on materials made by manufacturers will be accepted provided manufacturer maintains an adequate testing laboratory, makes regularly scheduled tests that are spot checked by an outside laboratory, and furnishes satisfactory certificates with name of entity making the test.

02667–4

F. Hydrostatic tests on pipe shall be made by Contractor with equipment qualified by the Engineer. Engineer or Project Representative reserves the right to accept or reject testing equipment. Hydrostatic testing shall be conducted in the presence of Engineer or Project Representative and a representative of water supplier.

G. All pipe, fittings, packing, jointing materials, valves, and fire hydrants shall conform to Section C of the American Water Works Association (AWWA) Standards.

H. All materials and products that contact potable water must be third party certified as meeting the specifications of ANSI/NSF Standard 61.

1.6 REQUIREMENTS OF REGULATORY AGENCIES

A. Water mains shall be sterilized to meet requirements of the appropriate Health

Department. Sterilization shall be in accordance with AWWA Standards C–651, latest revision.

B. Fire line sprinkler systems and dedicated fire lines shall be protected by an acceptable double check valve assembly. Water lines in high hazard categories shall be protected by an acceptable Reduced Pressure Zone (RPZ) Backflow

Preventer.

C. Any pipe, solder, or flux which is used in the installation or repair of any public water system or in any plumbing in a residential or nonresidential facility which provides water, through connection to a public water system, for human consumption shall be lead free. Lead free is defined as not more than 0.2% lead with respect to solder and flux and not more than 8.0% lead with respect to pipes and pipe fittings. Leaded joints necessary for repair of cast iron pipes shall be exempt from the lead-free requirement.

D. No water pipe shall pass through or come in contact with any part of a sewer manhole. Water lines may come in contact with storm sewers or catch basins if there is no practical alternative, provided ductile iron is used, no joints of water line are within the storm sewer or catch basin, and joints are located as far as possible from storm sewer or catch basin.

E. Air relief valves shall be provided in accordance with sound engineering practices at high points in water mains as required. Automatic air relief valves shall not be used in situations where flooding of the manhole or chamber may occur.

F. The open end of an air relief pipe from automatic valves or from a manually operated valve shall be extended to the top of pit and provided with a screened downward facing elbow.

G. Chambers, pits, or manholes containing valves, blow–off, meters, air release valves, or other such appurtenances to a distribution system, shall not be connected directly to any storm drain or sanitary sewer.

02667–5

H. There shall be no connection between distribution system and any pipes, pumps, hydrants, or tanks whereby unsafe water or other contaminated materials may be discharged or drawn into the system.

I. Asbestos cement pipe shall not be used in potable water system except in the repair of existing asbestos cement lines.

J. Thermoplastic pipe shall not be used above grade.

K. Steel pipe shall not be allowed in water systems unless specified as in AWWA

C200 or ASTM A53.

L. Water mains shall be installed out of contaminated areas, unless using piping materials protecting the system (i.e., Ductile Iron Pipe with chemical resistant

Viton gaskets). Route lines out of contaminated areas if possible.

M. Cross Connection Control (Backflow Prevention Devices):

1. There shall be no connection between the distribution system and any pipes, pumps, hydrants, or tanks whereby unsafe water or other contaminated materials may be discharged or drawn into the system.

2. No Bypasses shall be allowed, unless the bypass is also equipped with an acceptable backflow prevention device.

3. Reduced pressure principal backflow prevention assemblies shall not be installed in any area location subject to possible flooding. This includes pits or vaults not provided with a gravity drain to the ground’s surface capable of exceeding discharge rate of relief valve. Generally, if installed in a pit, drain line shall be 2 times the size of line entering backflow prevention device. The drain cannot empty into any type of ditch, storm drain, or sewer, which could flood water back into pit.

4. All piping up to inlet of the backflow prevention device must be suitable for potable water. The pipe must be AWWA or NSF approved. Black steel pipe cannot be used on inlet side of the device.

N. Where the minimum cover of 30 inches cannot be provided, pipe shall be steel, concrete, ductile iron, or other material and method acceptable to DHEC, and, when necessary, insulated to prevent freezing.

1.7 PRODUCT DELIVERY, STORAGE & HANDLING

A. Material shall be unloaded in a manner avoiding damage and shall be stored where it will be protected and will not be hazardous to traffic. Contractor shall repair any damage caused by the storage. Material shall be examined before installation. Neither damaged nor deteriorated material shall be used in the work.

02667–6

1.8 SEQUENCING AND SCHEDULING

A. Contractor shall arrange the work so sections of mains between valves are tested, sterilized, pavement replaced, and the section placed in service as soon as reasonable after installation.

1.9 ALTERNATIVES

A. The intention of these specifications is to produce the best system for the Owner.

If Contractor suggests alternative material, equipment or procedures will improve the results at no additional cost, Engineer and Owner will examine suggestion, and if accepted, it may be used. The basis upon which acceptance of an alternative will be given is its value to the Owner, and not for the Contractor’s convenience.

1.10 GUARANTEE

A. Contractor shall guarantee the quality of materials, equipment, and workmanship for a period of 12 months after acceptance. Defects discovered during this period shall be repaired by Contractor at no cost to the Owner.

1.11 EXISTING UTILITIES

A. All known utility facilities are shown schematically on the construction drawings and are not necessarily accurate in location as to plan or elevation. Utilities such as service lines or unknown facilities not shown will not relieve the Contractor of responsibility under this requirement. "Existing Utilities Facilities" means any utility existing on the project in its original, relocated, or newly installed position.

Contractor will be held responsible for the cost of repairs to damaged underground facilities, even when such facilities are not shown on drawings.

B. The Contractor shall call for underground utility locations before starting work.

Underground utilities location service can be contacted at 1–888–721–7877 or

811.

1.12 CONNECT NEW MAIN TO EXISTING SYSTEM

A. Contractor shall furnish the necessary pipe and perform all excavation, dewatering, shoring, backfilling, etc., necessary to make the connection of a new main to existing water system. Contractor shall contact the Superintendent of Water Utility a minimum of 48 hours in advance of construction. Contractor shall be responsible for coordinating construction with the utility operator.

1.13 DAMAGE TO EXISTING WATER SYSTEM

A. Damage to any part of the existing water system by Contractor or

Subcontractors, repaired by Utility Owner's forces, shall be charged to Contractor on basis of time and material, plus 30% for overhead and administration.

02667–7

1.14 MEASUREMENT AND PAYMENT

A. Measurement – The length of mains and branch lines to be paid for will be determined by measurement along the centerline of the various sizes and types of pipe actually furnished and installed, from the center of fitting, and from the center of the main to the end of the branch connection. No deduction will be made for the space occupied by valves and fittings.

B. Payment –

1. Pipe – Payment will be made at the contract unit price per linear foot for the various types and sizes of pipe that are actually placed, as shown on the plans, or as directed by the Engineer. Excavation, dewatering, installation, backfill, compaction, testing, metal detector tape, tracer wire, and all other incidentals to installation of the mains shall be considered as subsidiary obligations of the Contractor for completion of the line in place.

2. Fittings – Fittings for iron and plastic pipe in the distribution system will be paid for on the basis of the unit price per pound of ductile iron fittings at the weights listed in AWWA Specification C–153 for mechanical joint compact fittings. (Excluding Accessories.) No distinction will be made between the weight of compact ductile iron, cast iron or ductile iron fittings, unless the fittings used are not manufactured as compact fittings.

Fittings not manufactured as compact fittings will be paid for on the basis of the unit price per pound of ductile iron fittings at the weights listed in

AWWA C–110. P.V.C. fittings used for P.V.C. pipe, at the Contractor's option, will be considered a subsidiary obligation to the pipe and will not be measured for separate payment. Payment for P.V.C. fittings shall be included in the unit price per foot for P.V.C. The adapters necessary to connect to valves shall be considered a part of the line in which they are installed.

3. Valves – Payment will be made at the contract unit price for each size.

Payment will include furnishing and installing the valve, valve boxes, extensions, or manholes.

4. Fire Hydrants – Payment will be made at the contract unit price. Payment will include the cost of furnishing, installing and connecting the hydrant, gravel sump, restrained joints, backfilling, and painting. The 6–inch pipe from the main line to the hydrant will be paid for as 6–inch pipe. Gate valve and valve box will be paid for separately.

5. Cleaning and Disinfecting – No separate payment will be made for cleaning and disinfecting. Cleaning and disinfecting piping in the distribution system will be included in the lump sum and unit prices for the appropriate items.

6. House Service Connections – Payment will be made at the contract unit price. Payment will include the cost of furnishing and installing the tapping saddle, corporation stop, curb stop and marking stake at the property line. Service pipe will be paid for at the contract unit price for each size specified.

02667–8

7. Grassing – There will be no separate measurement or payment. Grassing shall be considered as a subsidiary obligation of the Contractor in the restoration of disturbed areas.

8. Metal Detector Tape – No separate payment will be made for tape. The cost of furnishing and placing metal detector tape shall be included in the contract unit price for installing pipe.

9. Connections to Existing Mains – Payment will be made at the contract unit price for each type connection and will include all equipment, labor, and materials required to locate, excavate, cut, connect, backfill, and compact.

10. Tapping Sleeves and Crosses – Payment will be made at the contract unit price. Payment will include all labor, materials, and equipment necessary to locate, excavate, furnish, and install the sleeve or cross, valve, valve boxes or manholes, tap the existing main, backfilling and compaction.

11. Remove and Replace Existing Pavement – Payment will be made on a square yard basis and constructed in accordance with the detail shown.

12. Flush Valves – Payment will be made at the contract unit price. Payment will include furnishing and installing the ball valve, riser pipe and cap, valve or meter box and the concrete collar.

13.