6-Exhibit D Special Provisions.pdf

USPS ACCESS IMPROVEMENTS SPECIAL PROVISIONS

SPECIAL PROVISIONS - USPS

ACCESS IMPROVEMENTS

EXHIBIT D

RFP 2026-07

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TOWN OF HILTON HEAD ISLAND

USPS ACCESS IMPROVEMENTS

TECHNICAL SPECIFICATIONS

PART 1 – GENERAL

1. SCOPE

The project consists of the demolition of the existing USPS asphalt parking lot and construction of a new asphalt parking area, drive isles, 12’ wide pervious asphalt pathway and associated signage and marking, storm drainage, grading, and erosion control BMPs and stabilization.

2. SUBMITTALS

2.1 Construction Schedule. The CONTRACTOR shall submit to the TOWN and

ENGINEER for approval within 10 days of the contract execution, a practicable critical path method construction schedule based on calendar days and the major tasks involved and a methodology statement for prosecution of the work. No work on site shall begin until the schedule is approved in writing by the TOWN.

2.2 Contact List. The CONTRACTOR shall submit to the TOWN and ENGINEER at least 10 days prior to initiation of work a typed list of pertinent project personnel and their telephone numbers and e-mail addresses by which key personnel can be reached for purposes of notification and other matters discussed in these Specifications.

Should a subcontractor perform the work, the CONTRACTOR shall provide a contact person or person(s) directly employed by the CONTRACTOR who shall be the TOWN’s point of contact and who shall be in responsible charge of the subcontractor during the duration of the work.

2.3 List of Subcontractors. CONTRACTOR shal l submit to the TOWN and ENGINEER at least 10 days prior to the initiation of work a list that includes the name and physical address of each subcontractor and vendor and a description of the work or products to be provided by each entity. All subcontractors and vendors shall be acceptable to the TOWN.

2.4 Progress Reports. Between the time that the Notice to Proceed is issued and mobilization to the project site occurs, the CONTRACTOR shall only submit weekly progress reports. The CONTRACTOR shall notify the ENGINEER and TOWN’s Project

Manager at least three (3) days in advance of the mobilization of equipment and/or materials to the project site. Once the CONTRACTOR is mobilized to the work site, the CONTRACTOR shall submit daily reports (if required by the TOWN) that summarize the work completed at the end of each workday. Daily Reports shall be submitted every working day (if required by the TOWN) during the construction period (even when no work is done) between the time at which the

CONTRACTOR is mobilized at the work site and the time of Final Acceptance.

Reports shall be submitted by 10:00 a.m. to the ENGINEER and TOWN’s Project

Manager on a daily basis via e-mail. The CONTRACTOR shall coordinate with the

TOWN’s Project Manager to formulate an acceptable format for the daily report.

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3. SURVEY REQUIREMENTS

3.1 Horizontal control data and elevations for the work are included in the Plans.

Descriptions of the monument control in the vicinity of the work are also furnished in the Plans.

3.2 The CONTRACTOR shall establish the horizontal and vertical limits of the work and shall only use the tabulated and noted control provided in the Plans. The

CONTRACTOR shall not scale positions, distances, dimensions, elevation, slope, etc.

from the Plans for the purposes of work layout. The CONTRACTOR shall be responsible for all measurements that may be required for the execution of the work to the location and limit marks prescribed in the Plans and in these Specifications.

The ENGINEER reserves the right to modify the locations and elevations of the limit marks as may be required to meet changed conditions or as a result of necessary modifications to the work. A surveyor registered in the State of South Carolina shall be responsible for and certify all survey work provided by CONRTACTOR.

3.3 If the CONTRACTOR elects to establish temporary benchmarks through the work site, they shall be established by a closed loop of levels from a permanent benchmark or a line of levels between two permanent benchmarks. Any such temporary benchmark shall be located upon fixed objects such as utilities, roadways, etc. to assure reliability through the duration of the work.

3.4 Construction Stakes. The CONTRACTOR shall furnish, at his own expense, such stakes, templates, platforms, equipment, tools and material, and all labor as may be required in laying out any part of the work from the monuments, control data and elevations. It shall be the responsibility of the CONTRACTOR to maintain and preserve the stakes and other marks established by the ENGINEER for the purposes of this work until authorized to remove them. If such marks are destroyed by the

CONTRACTOR or through his negligence prior to their authorized removal, they may be replaced by the ENGINEER at his discretion, and the expense of replacement will be deducted from any amounts due or to become due. Work may be suspended at any time when location and limit marks established by the

CONTRACTOR are not reasonably adequate to permit checking of the work. It shall be the responsibility of the CONTRACTOR to determine rights of way, easements, and construction limits and other marks as established by the ENGINEER to ensure that the work is spatially accurate.

3.5 Record Data and Drawings. The CONTRACTOR shall keep accurate, legible records of the locations, types, and sizes of sanitary lines, service laterals, manholes, cleanouts, water lines, fittings, valves, hydrants, drainage pipes, drainage structures, pipe sizes and materials, approved field modifications, and other related work performed under this project. On a set of project plans, the CONTRACTOR shall prepare a set of "record" drawings from the data stated above. The horizontal locations of all portions of items installed on this project shall be accurately tied down to features that are physical and visible, such as property corner markers and/or permanent type structures. The actual invert elevations of all manholes, storm sewers and structures, sanitary sewers as built shall be clearly indicated on the

“record drawings”. These "record drawings” shall be kept clean and dry and maintained in a current state with the progress of the work. If at any time, a copy of this plan or portion of it is requested by the OWNER, such copy shall be made

P a g e | 3 available within 24 hours after the request is made. The final record survey shall be provided to the Town of HHI for review and approval within two (2) weeks of final completion. Final record drawings shall consist of a survey, signed and sealed by a licenses Surveyor in the State of South Carolina. The final record survey shall be delivered in (1) hardcopy and electronic (PDF) format. Pathway and walkway elevations shall include centerline elevations. Contract retainage will not be distributed by the Town until the final record survey is deemed acceptable to the

Town for project closeout purposes.

3.6 Property Corners. The CONTRACTOR shall be responsible for restoring any and all property corners or monuments disturbed during construction. They shall be restored in accordance with the Town’s Land Management Ordinance, by a professional land surveyor registered in the State of South Carolina before final payment will be made.

3.7 Project Coordination.

Survey/Recording: Working from established lines and levels at or near project site, establish and maintain dependable markers for lines and levels of the work construction. Calculate dimensions and measure for layout of work; do not scale the drawings. Maintain surveyor's log of layout work. Record deviations (if any) from drawing information on existing conditions, and review with Engineer at time of discovery. Provide copy of survey log and as-built drawings to owner at contract completion.

3.8 Field Engineering.

Surveys and Records/Reports: Work from lines and levels established by property survey, and as shown in relation to the work, establish and maintain benchmarks and other dependable markers to set lines and levels for the work and elsewhere on site as needed to properly locate each element of entire project. Survey and stake property corners, easements, and rights of way as necessary to determine construction limits and ensure horizontal construction accuracy.

Calculate and measure required dimensions as shown (within recognized tolerances if not otherwise indicated).

Do not scale drawings to determine critical dimensions.

Advise subcontractors performing the work, of marked lines and levels provided for their use in layout of work.

Survey Procedures: Verify construction staking from information shown on

Drawings in relation to survey, existing benchmarks, and fasteners before proceeding with actual work. As work proceeds, check major location of critical dimensions. Replace all staking damaged or removed during construction process prior to installation.

3.9 The TOWN reserves the right to withhold final payment until acceptable verifiable as-built drawings prepared, signed, and seal by a Professional Surveyor Licensed in the State of South Carolina have been submitted.

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4. PROTECTION OF EXISTING STRUCTURES

Roadways, fences, utilities, and other dwelling infrastructure within the work area and access routes shall be protected by the CONTRACTOR to prevent damage thereto by the

CONTRACTOR’S operations.

5. TESTING AND INSPECTING

5.1 Owner shall select and engage the testing laboratory. Testing laboratory shall be responsible to the Owner and Owner’s Engineer. Payment for laboratory and all tests shall be by the Owner, except Owner specifically reserves the right to deduct from Contractor’s payment, expenses, and charges of testing laboratory when:

5.1.1 Contractor gives notice the work is ready for inspection and testing, and fails to be ready for the test, and/or

5.1.2 Testing of the Contractor’s work, products or materials fail, and retesting is required, and/or

5.1.3 Contractor abuses the service or interferes with the work of the testing laboratory in the conduct of this work.

5.2 Employment of testing agency or laboratory in no way relieves Contractor of obligation to perform Work in accordance with requirements of the specifications.

5.3 Testing laboratory and Project Engineer/Project Representative shall be given a minimum of 48 hours’ notice prior to taking any tests.

5.4 Test results shall be furnished to the Project Representative prior to continuing with associated or subsequent work.

5.5 Testing shall conform to SCDOT Testing Procedures and Sampling. Should SCDOT not have testing standards for any component of construction, the Alternate

Testing Schedule in Part 3 shall be used.

6. SITE CLEAN-UP and RESTORATION

6.1 It is the intent of the TOWN that the work be accomplished with minimum disturbance to the properties adjacent to the work area (specifically, the adjacent landscaping, trees, and nearshore areas), and that the immediate and general vicinity of the work area remain in its pre-project state subsequent to completion of the work. All materials utilized by the CONTRACTOR during construction shall be removed from the site, including survey stakes, debris, flagging and other temporary survey controls.

6.2 Should the CONTRACTOR during the progress of the work, lose, dump, or misplace any material or equipment which in the opinion of the TOWN or ENGINEER may be considered unaesthetic, environmentally deleterious, dangerous to the public, or impact adjacent properties the CONTRACTOR shall recover and remove same within 24 hours of receipt of said notice at no additional cost to the TOWN.

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6.3 The CONTRACTOR shall inspect the work areas at the end of every workday to ensure that all debris left by the CONTRACTOR’s and subcontractor’s workers has been removed from the work areas and properly disposed of. This includes, for example, lunch bags, soda cans, drink cups, etc.

6.4 Upon completion of all construction activity, the CONTRACTOR shall restore all staging, storage, transport, and work areas, fences, and other facilities to an equivalent pre-project condition or better to the approval of the TOWN, ENGINEER.

7. EXAMINATION & FINAL ACCEPTANCE

7.1 The work will be thoroughly examined at the cost and expense of the TOWN as soon as practicable, and no later than thirty (30) days after the completion of the entire work or any portion of the work thereof. The CONTRACTOR or his authorized representative will be notified when the examination(s) is (are) to be made and will be permitted to accompany the survey party.

7.2 Should deficiencies in the work be determined relative to the Constructions Plans and Contract Documents, the CONTRACTOR will be required to correct same at the discretion and direction of the ENGINEER or TOWN. Corrections to the work involving the placement of additional material of any kind shall be paid for at the contract rate. No direct payment shall be made for corrections to the work involving the removal and replacement of unacceptable materials, escarpment removal, or site clean-up, unless specifically allowed by the ENGINEER or TOWN.

7.3 Final acceptance of the whole or a part of the work and the deductions or corrections of deductions made thereon will not be reopened after having once been made, except on evidence of collusion, fraud or obvious error, and the acceptance of a completed section shall not change the time of payment of the retained percentages of the whole or any part of the work.

PART 2 – MATERIALS – USPS ACCESS IMPROVEMENTS

1. GENERAL. The majority of quantities listed in the plan set are based on SCDOT 2025

Standard Specifications for Highway Construction and SCDOT’s standard drawings. Those quantities that are not part of the SCDOT’s 2025 Standard Specifications or standard drawings are specified below.

2. SP-1 REMOVE & DISPOSE OF EXISTING CONCRETE SIDEWALK/WALKWAY. Measurement shall include full removal and lawful disposal of existing concrete sidewalk/pathway section, as indicated on plans, as prescribed by line-item unit completed and accepted. Payment will be made at the contract unit price per square yard of pathway removed and will include all materials, labor, disposal costs, and incidental costs required to remove and dispose of concrete sidewalk/pathway.

3. SP-2 REMOVE & DISPOSE OF EXISTING WATER LINE. Measurement shall include full removal and lawful disposal of the existing water line(s), as indicated on plans, as prescribed by line-item unit completed and accepted. Payment will be made at the contract unit price per linear foot for the various types and sizes of pipe that are removed and will include all materials, labor, equipment, bypass, locating, excavating, dewatering, cutting, disposal costs, and incidental costs required to remove and dispose of the water line.

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4. SP-3 REMOVE & DISPOSE OF EXISTING SIGN. Measurement shall include full removal and disposal of signs, supporting posts and foundations, as indicated on plans, as prescribed by line-item unit completed and accepted. Payment will be made at the contract unit price per sign removed and will include all materials, labor, and incidental costs required to remove and dispose of the sign, post, and all appurtenances.

5. SP-4 REMOVE & DISPOSE OF EXISTING WOOD POSTS, WHEEL STOPS & SPEED BUMPS.

Measurements shall include full removal and lawful disposal of all wooden posts, wheel stops, and speed bumps required to be removed for construction. Payment will be made at the contract unit price per item removed and will include all materials, labor, equipment and incidental costs required to remove and dispose of wooden posts, wheel stops, speed bumps and all appurtenances.

6. SP-5 REMOVE & DISPOSE OF EXISTING LIGHT & CONNECTING LINE. Measurement shall include full removal and lawful disposal of existing light fixtures and connecting lines, as indicated on plans, as prescribed by line-item unit completed and accepted. Payment will be made at the contract unit price for Remove & Dispose of Existing Light &

Connecting Line and will include all utility coordination materials, labor, disposal costs, and incidental costs required to remove and dispose of existing lights and connecting lines. It is the Contractor’s responsibility to coordinate with the utility provider.

7. SP-6 TREE REMOVAL. Measurement shall include the full removal and lawful disposal of trees, as indicated on plans, as prescribed by line-item unit and completed and accepted.

Payment will be made at the contract unit price for per tree removed and will include all materials, labor, equipment, disposal costs, and incidental costs required to safely limb, remove, and dispose of trees.

8. SP-7 CONNECT PROPOSED PIPE TO EXISTING INLET. Measurement shall include full installation and connection of the proposed pipe to existing stormwater structure, as prescribed by line-item unit completed and accepted. Payment will be made at the contract unit price for each pipe connection made. Payment shall include cost of all pipes, joints, filter fabric and bedding, including trenching, dewatering, excavation, backfill and compaction, surface clean–up, existing structure repair, and all incidental labor, testing and material necessary to complete the connection.

9. SP-8 CONNECT PROPOSED PIPE TO EXISTING PIPE. Measurement shall include full installation and connection of the proposed pipe to existing pipe, as prescribed by line-item unit completed and accepted. Payment will be made at the contract unit price for each pipe connection. Payment shall include cost of all pipes, concrete, saddles, steel, joints, filter fabric and bedding, including trenching, dewatering, excavation, backfill and compaction, surface clean–up, and all incidental labor, testing and material necessary to complete the connection.

10. SP-9 EARTHWORK - COMPLETE. Measurement shall include any and all topsoil removal, stock pipe and re-placement, on-site movement of earthwork to achieve final grade, excavation, placement and compaction of in-situ materials to achieve specified subgrade, borrow material required for paving systems, drainage swale excavation and earthwork movement, stormwater excavation and grading to construct this project. The line item also includes material type sourcing, machine handling, haul, placement, compaction, fuel, equipment, labor, disposal, and any other ancillary items required to provide the earthwork required to construct this project. Payment will be made at the line-

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11. SP-10 3” #789 WASHED CRUSH STONE AGGREGATE. Measurement shall include full installation of 3” #789 Washed Crush Stone Aggregate, as prescribed by line-item unit completed and accepted. Payment will be made at the contract unit price per square yard of completed and accepted aggregate for the thickness specified. Payment shall include all materials, labor, haul, delivery, excavation, placement, compaction, backfill, and any other incidental expenses necessary to construct and place 3” #789 Washed Crushed Stone

Aggregate.

12. 7209100/SP-11 DETECTABLE WARNING SURFACE. All detectable warning surfaces shall have a concrete apron surrounding the surface as per the plans. East Jordan Iron Works (EJ)

DURALAST® detectable warning plates shall be used. The tiles shall be a 300 x 300mm (11.8 x 11.8”) square which is one foot installed, and the color shall be NATURAL CAST IRON or other color specified by Owner. The coarse aggregate on the back of each tile enhances adhesion to Portland cement concrete substrate, using an exterior latex-based adhesive material. The detectable warning Surface materials must comply with the current requirements of the Americans with Disabilities Act.

13. SP-12 VALLEY GUTTER. Measurement shall include full installation of the valley gutter, as prescribed by line-item unit completed and accepted. Payment will be made, regardless of thickness, at the contract unit price per square yard of completed and accepted valley gutter. Payment shall include all materials, labor, tools, inserts, placement, formwork, finishing, compaction, backfill, and any other incidental expenses necessary to construct and place valley gutter.

14. SP-13 OUTLET PROTECTION WITH FABRIC. Measurement shall include full installation of the outlet protection with fabric, as prescribed by line-item unit completed and accepted.

Payment shall include all materials, labor, haul, delivery, placement, maintenance, and any other incidental expenses necessary to construct and place outlet protection with fabric.

15. SP-14 DUST CONTROL. Payment shall be made at the contract unit price for Dust Control and will include all materials, labor and incidental costs required to implement and maintain dust control.

16. SP-15 TRACKOUT CONTROL MAT. Measurement shall include full installation and removal of the trackout control mat as prescribed by line-item unit completed and accepted.

Payment will be made at the contract unit price per mat. Payment shall include all materials, labor, delivery, placement and any other incidental expenses required to install trackout control mat.

17. 1031000/SP-16 MOBILIZATION. Payment shall be made at the contract unit price for mobilization and consists of the preparatory operations including: moving personnel, supplies, equipment and incidentals to the project site; paying bond and insurance premiums; establishing offices, buildings, and other facilities necessary for work on the project; all other preparatory work or costs incurred before beginning work on the project and the cost of demobilization.

18. SP-17 REMOVE & REINSTALL EXISTING FIRE HYDRANT. Measurement shall include full removal, relocation, and reinstallation of the fire hydrant as prescribed by line-item unit completed and accepted. Payment will be made at the contract unit price for each

P a g e | 8 hydrant and will include all labor, equipment, materials, excavation and installation of valves, boxes, joints, extensions and all other connecting appurtenances required to completely reinstall existing hydrant.

19. SP-18 EV CHARGING SIGN. Measurement shall include all materials and fabrication to provide the complete signage, prescribed by line-item unit completed and accepted.

Payment shall include all materials, including fabrication, hardware, concrete, posts, materials, labor, and all incidental costs required to install the sign completely.

20. SP-19 MUTCD SIGNS. Measurement shall include all materials and fabrication to provide the complete signage, prescribed by line-item unit completed and accepted. Payment shall include all materials, including fabrication, hardware, concrete, posts, materials, labor, and all incidental costs required to install signs completely.

21. SP-20 PATHWAY SIGNAGE. Measurement shall include all materials and fabrication to provide the complete signage, prescribed by line-item unit completed and accepted.

Payment shall include all materials, including fabrication, hardware, concrete, materials, labor, and all incidental costs required to install signs completely.

22. SP-21 REMOVE & REINSTALL EXISTING DROP BOX. Measurement shall include full removal, storage, and placement of the existing USPS drop box as indicated on plans, as prescribed by line-item unit completed and accepted. Payment will be made at the contract unit price and will include removal, storage, materials, labor, hardware, and incidental costs required to remove, store, and reinstall the existing post office drop box.

23. SP-22 EV CHARGING PEDESTAL. Measurement shall include full installation of the EV charging pedestal as prescribed by line-item unit completed and accepted. Payment will be made at the contract unit price per pedestal and will include labor, materials, equipment, installing the electronics, chargers, extensions, all connecting appurtenances, and any other incidental expenses to placing the EV charging pedestal.

24. SP-23 WATER UTILITIES. Measurement shall include full installation and connection of proposed pipes to existing pipes and structures, as prescribed by line-item unit completed and accepted. Payment will be made at the contract unit price per linear foot for the various types and sizes of pipe that are placed. Payment shall include the cost of all labor, materials, locating, excavating, dewatering, cutting, cleaning, disinfecting, installing and grouting in pipe, fittings, sealing joints, backfilling, compaction, and all incidental work necessary to complete the connection.

PART 1 – GENERAL

23.1 SECTION INCLUDES

A. Piping

B. Valves

C. Fittings

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D. Connect to Existing System

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

23. 2 OMITTED

23.3 OPTIONS

23.4 REFERENCES (LATEST REVISION)

A. Hilton Head Island Public Service District No. 1 (HHI PSD No.1) – All water distribution materials and installation shall be in accordance with HHI PSD No.1 specification and standards. In the event of an omission in the HHI PSD NO.1 specifications, the specifications below shall govern.

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

Seamless.

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

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

E. ASTM C 478 – Precast Reinforced Concrete Manhole Sections.

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

Using Modified Effort.

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

(Vinyl Chloride) (CPVC) Compounds.

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

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

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

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

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

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

M. ASTM D 6938 – In–Place Density and Water Content of Soil and Soil – Aggregate by

Nuclear Methods (Shallow Depth).

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

Inspection.

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

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

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

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

Flanges.

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

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

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

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

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

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

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

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

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

Waterworks Service.

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

Service.

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

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

EE. AWWA C 651 – Disinfecting Water Mains.

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

GG. AWWA C 900 – Polyvinyl Chloride (PVC) Pressure Pipe and Fabricated Fittings, 4 inch through 12 inch for Water Transmission and Distribution.

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

II. AWWA C 905 – Polyvinyl Chloride (PVC) Pressure Pipe and Fabricated Fittings, 14 inch through 48 inch (350 mm through 1,200 mm), for Water Transmission and

Distribution.

JJ. 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).

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

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

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

Domestic Water Distribution Systems.

23.5 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 which 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.

F. Hydrostatic tests on pipe shall be made by Contractor with equipment qualified by the Engineer. The 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

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Water Supplier.

G. All pipes, 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 which contact potable water must be third party certified as meeting the specifications of ANSI/NSF Standard 61.

23.6 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. Potable water lines shall not be laid less than 25 feet horizontally from any portion of a wastewater tile field or spray field, or shall be otherwise protected by a method acceptable to DHEC.

F. 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.

G. 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.

H. 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.

I. Chambers, pits, or manholes containing valves, blow–off, meters, air release

P a g e | 12 valves, or other such appurtenances to a distribution system, shall not be connected directly to any storm drain or sanitary sewer.

J. 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.

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

L. Thermoplastic pipe shall not be used above grade.

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

C200 or ASTM A53.

N. Water mains shall be installed out of contaminated areas, unless using piping materials protecting the system (i.e., Ductile Iron Pipe with chemical resistant gaskets). Route lines out of contaminated areas if possible.

O. Cross Connection Control (Backflow Prevention Devices):

i. 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.

ii. No–by–passes shall be allowed, unless the bypass is also equipped with an equal, acceptable backflow prevention device.

iii. 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.

iv. 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.

23.7 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 and neither damaged nor deteriorated material shall be used in the work.

SEQUENCING AND SCHEDULING

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

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23.8 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 it is 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

Contractor’s convenience.

23.9 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.

23.10 EXISTING UTILITIES

A. All known utility facilities are shown schematically on plans, and are not necessarily accurate in location as to plan or elevation. Utilities such as service lines or unknown facilities not shown on plans 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 plans

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

Underground utilities location service can be contacted at 811 or 1–888–721–

7877.

23.11 CONNECT NEW MAIN TO EXISTING SYSTEM

A. Contractor shall furnish 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.

23.12 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.

23.13 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.

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B. Payment –

i. 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, installation, backfill, compaction, testing, metal detector tape, tracing wire, and all other incidentals to installation of the mains shall be considered as subsidiary obligations of the Contractor for the completion of the line in place.

ii. 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.

iii. 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.

iv. 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.

v. 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.

vi. 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.

vii. Tracing Wire – No separate payment will be made for wire. The cost of furnishing and placing location wire shall be included in the contract unit price for installing pipe.

viii. Restrained Joints – No separate payment will be made for restrained joints. The cost of furnishing and installing restrained joints shall be included in the contract unit price for installing pipe.

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23.14 TESTING

A. Laboratory tests for moisture density relationship for fill materials shall be in accordance with ASTM D 1557, (Modified Proctor).

B. In place density tests in accordance with ASTM D 6938.

C. Testing laboratory shall operate in accordance with ASTM D 3740 and E 329 and be acceptable to the Engineer.

D. The testing laboratory and Project Engineer/Project Representative shall be given a minimum of 48 hours notice prior to taking any of the tests.

E. Testing Laboratory shall be selected by, engaged by and be the responsibility of the Owner. Testing Laboratory shall be responsible to the Owner and the

Owner’s Engineer. Payment for laboratory and all tests shall be by the Owner, except the Owner specifically reserves the right to deduct from the contractor’s payment, the expense and charges of the Testing Laboratory when:

i. the contractor gives notice that his work is ready for inspection and testing, and the contractor fails to be ready for the test, and/or

ii. the test of the contractor work products or materials fail, and retesting is required, and/or

iii. the contractor abuses the services or interferes with the work of the testing laboratory in the conduct of this work.

Test results shall be furnished to the Engineer prior to continuing with associated or subsequent work.

Products and materials used in the work shall conform to the following:

23.15 GENERAL REQUIREMENTS

A. All material or products that come into contact with drinking water shall be third party certified as meeting the specifications of the American National

Institute/National Sanitation Foundation Standard 61, Drinking Water System

Components – Health Effects. The American National Standards Institute shall accredit the certifying party.

B. All pipe, fittings, packing, jointing materials, valves, and fire hydrants shall conform to Section C of the AWWA Standards.

23.16 PIPE

A. Ductile Iron Pipe – Shall conform to ANSI A–21.50 (AWWA C–150) and ANSI A–

21.51 (AWWA C–151). All pipe shall be Pressure Class 350 unless otherwise noted.

It shall be cement lined in accordance with ANSI A–21.4 (AWWA C–104).

B. P.V.C. – All pipe shall be blue in color with factory marked homing lines. Pipe 4

P a g e | 16 inches through 12 inches shall conform to all requirements of AWWA C–900, DR

18, pressure class of 235 p.s.i. and shall have the following minimum wall thickness:

4 inches 0.267 inches

6 inches 0.383 inches

8 inches 0.503 inches

10 inches 0.617 inches

12 inches 0.733 inches

Pipe 14 inches through 18 inches in diameter shall conform to all the requirements of AWWA C 905, DR 18, pressure rating of 235 p.s.i.

Pipe with diameter less than 4 inches shall conform to all requirements of ASTM

D– 1784 and D–2241 (SDR 21). The pipe shall have a minimum pressure rating of

200 p.s.i. Certificates of conformance with the foregoing specifications shall be furnished with each lot of pipe supplied. All P.V.C. pipe shall bear the National

Sanitation Foundation Seal of Approval.

C. Plastic Tubing – Tubing for service lines shall be:

Polyethylene Tubing: CTS PE 3408 conforming to all requirements of AWWA C–901 and ASTM D–2737 (SDR9). The tubing shall be copper tubing size and rated for a minimum working pressure of 200 p.s.i. Marking on the tubing shall include:

nominal tubing pipe size; type of tubing material – PE 3408; SDR 9; pressure rating

200 p.s.i.; ASTM D–2737; manufacturer’s name and seal of the National

Sanitation Foundation.

23.17 JOINTS

A. Flanged Joints – Shall conform to ANSI A–21.15 (AWWA C–115). Bolts shall conform to ANSI B–18.2.1 and nuts shall conform to ANSI B–18.2.2. Gaskets shall be rubber, either ring or full face, and shall be 1/8 inch thick. Gaskets shall conform to the dimensions recommended by AWWA C–115 latest revision.

B. Mechanical Joints – In ductile iron pipe shall conform to ANSI A–21.11 (AWWA C–

111).

C. Push–On–Joints – In ductile iron pipes shall conform to ANSI A–21.11 (AWWA C– 111)

D. Plastic Pipe – Joints in plastic pipe 4 inches and larger shall meet all requirements of AWWA C–900. Joints in plastic pipe 14 inches through 18 inches shall meet all requirements of AWWA C905. Joints in plastic pipe with a diameter less than 4 inches shall conform to ASTM D–3139.

E. Restrained Joints – Restrained joints for pipe, valves and fittings shall be mechanical joints with ductile iron retainer glands equivalent to “Megalug” or push–on type joints equivalent to "Lok–Ring," "TR Flex," or "Super Lock" and shall have a minimum rated working pressure of 250 p.s.i. for ductile iron pipe and 100 p.s.i. with a minimum safety factor of 2:1 for PVC pipe. The joints shall be in accordance with the applicable portions of AWWA C–111. The manufacturer of the joints shall furnish certification, witnessed by an independent laboratory, that the joints furnished

P a g e | 17 have been tested without signs of leakage or failure. Restrained joints shall be capable of being deflected after assembly.

F. Natural rubber or other material which will support microbiological growth may not be used for any gaskets, o–rings, and other products used for jointing pipes, setting meters and valves or other appurtenances which will expose such material to water.

23.18 FITTINGS

A. Fittings for Ductile Iron or Plastic Pipe – Shall be ductile iron, manufactured in accordance with ANSI A–21.53 (AWWA C–153). They shall be cement lined in accordance with ANSI A–21.4 (AWWA C–104). Fittings shall be designed to accommodate the type of pipe used.

B. Fittings for Flanged Pipe – Shall be manufactured in accordance with ANSI A–

21.10 (AWWA C–110), Class 125 flanges.

C. Fittings for Plastic Pipe – Less than 4 inches shall be PVC with ring tite rubber joints conforming to ASTM D–3139.

23.19 GATE VALVES

A. Two Inches and Larger – Shall be cast iron or ductile iron body, bronze mounted, double disc or resilient wedge design, with non–rising stems, conforming to

AWWA C–500, C–509, or C–515. Valves shall have a working pressure of 200 p.s.i.

and be tested at 400 p.s.i.

Valves shall be furnished with "O" ring packing. Two "O" rings shall be located above the thrust collar and one “O” ring below. The thrust collar shall be permanently lubricated and have an anti–friction washer on top of the thrust collar.

Valves installed in pits or above ground shall be furnished with hand wheels.

Buried valves shall be furnished with square operating nuts.

B. Smaller than 2 Inches – Shall be all brass, ball valve type. The pressure rating shall be 175 p.s.i.

C. Valve Boxes – Underground valves shall be installed in acceptable valve boxes.

The valve boxes shall have a suitable base which does not damage the pipe, and shaft extension sections to cover and protect the valve and permit easy access and operation. The box, cover, and any extensions needed shall be cast or ductile iron having a crushing strength of 1,500 pounds per linear foot. Valve boxes shall conform to the detail shown.

D. Valve Manholes –

1. Masonry – Shall be new whole brick of good quality laid in masonry mortar or cement mortar made of 1 part Portland cement and 2 parts clean sharp sand. Every brick shall be fully bedded in mortar. Manholes shall conform to the locations and details shown on the plans.

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2. Precast Concrete – Shall be reinforced concrete constructed in accordance with ASTM C 478 and the details shown on the plans

“Precast Concrete Manholes.” The joints shall be tongue and groove sealed with flexible gaskets or mastic sealant. Gaskets shall be O–Ring or equivalent to Type A or B “Tylox” conforming to ASTM C 443. Mastic shall be equivalent to “Ram–nek” with primer. The primer shall be applied to all contact surfaces of the manhole joint at the factory in accordance with the manufacturer’s instructions.

3. Frames and Covers – Shall be cast iron equivalent to the following:

E. Flush valves – Shall conform to the details shown.

23.20 VALVE BOXES

A. Underground valves shall be installed in approved valve boxes. The valve boxes shall have a suitable base that does not damage the pipe, and shaft extension sections to cover and protect the valve and permit easy access and operation.

The cover, box, and any extensions needed shall be cast or ductile iron having a crushing strength of 1,500 pounds per linear foot. Valve boxes shall conform to the detail shown.

23.21 VALVE MANHOLES

A. Masonry – Shall be new whole brick of good quality laid in masonry mortar or cement made of one part Portland cement and two parts clean sharp sand.

Every brick shall be fully bedded in mortar. Manholes shall conform to the locations and details shown on the plans.

B. Precast Concrete – Shall be reinforced concrete constructed in accordance with ASTM C 478 and the details shown on the plans “Precast Concrete

Manholes.” The joints shall be tongue and groove sealed with flexible gaskets or mastic sealant. Gaskets shall be O–Ring or equivalent to Type A or B “Tylox” conforming to ASTM C 443. Mastic shall be equivalent to “Ram–nek” with primer.

The primer shall be applied to all contact surfaces of the manhole joint at the factory in accordance with the manufacturer’s instructions.

C. Frames and Covers – Shall be cast iron equivalent to the following:

23.22 FIRE HYDRANTS

A. General – Hydrants shall be manufacturer's current model design and construction. All units to be complete including joint assemblies. Physical characteristics and compositions of various metal used in the hydrant components shall meet the requirements as specified in AWWA C–502 latest revision. Hydrants shall be suitable for working pressure of 150 p.s.i.

Neenah Foundry Co. R–1668 Type “C” Lid

Neenah Foundry Co. R–1668 Type “C” Lid

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B. Bonnet – Bonnet may have oil filled or dry…