CSI_Specifications.pdf

SECTION 01010

SUMMARY OF WORK

PART 1 - GENERAL

1.1 PROJECT DESCRIPTION:

A. This project replaces a section of 4” steel water line with an HDPE water line serving the USFS Callahan Guard Station. This section of line runs along the edge of a paved county road through the town of Callahan and across private property. It will connect to existing new PVC water line that continues to the Station at one end and an old existing steel line that connects to the water storage tank at the other end. A large portion of the new line is in very close proximity to a new PVC water line serving the town. Extreme care must be used to avoid damage to this line and to adjacent private property.

B. The Contractor shall furnish all labor, supervision, equipment, transportation and materials to perform the following:

Excavating a waterline trench; installing a new 4” HDPE water line; backfill and compaction, installing buried utility marking tape; and patching the road pavement to county specifications contained in the included encroachment permit. All work shall meet requirements shown on the drawings and specified herein.

1.2 LOCATION:

A. The project is located approximately in the town of Callahan, CA. From Yreka proceed south via State Highway 3 approximately 40 miles to the town of Callahan. Turn right onto South Fork Road and proceed approximately ¼ mile to the beginning of project.

B. The Project owner is the U.S. Forest Service, Klamath National Forest.

1.3 CONTRACTOR’S USE OF PREMISES:

A. The Contractor shall conduct his operations to minimize inconvenience to the fire station and Callahan water system users. The Contractor may close portions of the site during construction, providing temporary access or detours. The closure plan shall be developed by the contractor, and approved by the Contracting Officer and Project Engineer.

C. Storage of construction materials shall be limited to those areas designated and approved by the Project Engineer.

D. Site clearing shall be limited to areas within the limits of construction, and as shown on the drawings. Care shall be taken not to damage or destroy natural vegetation outside construction limits.

E. The Contractor shall take precautions to locate and protect all existing utility lines.

Notify utility companies and the Project Engineer prior to excavations in the vicinity of known utilities.

1. Should damage occur to an unknown utility, repairs shall be performed as directed by the Project Engineer. Equitable adjustments shall be made under the terms of the contract.

F. The Contractor shall comply with all legal load requirements of the State of

California and County Jurisdictions when operating on site access roads. Contractor shall abide by all provisions of the attached Siskiyou County Encroachment Permit.

Damage to existing roadways from equipment operation or excessive loads shall be repaired by the Contractor at no additional cost to the Owner.

1.4 FIELD VERIFICATION:

A. The Contractor shall field-verify all new and existing dimensions and field conditions prior to starting work or ordering products.

1.5 CONTRACTOR-FURNISHED ITEMS:

A. The Contractor shall furnish all labor, materials and equipment necessary for the completion of the work, as specified.

PART 2 - PRODUCTS

Not Used.

PART 3 - EXECUTION

END OF SECTION

SECTION 01300

SUBMITTALS

1.1 DESCRIPTION: The work of this section consists of submittal requirements before and during construction.

A. Progress Schedule: Submit schedule of work (normally in bar chart form) showing estimated starting and completion dates for each part of the work.

1.2 SHOP DRAWINGS, PRODUCT DATA AND SAMPLES:

A. General Procedures:

1. As specified in the individual sections, forward submittals to the Project

Engineer at least 7 days before need for approval. Unless a different number is specified, submit three copies of each shop drawing, two specimens of each sample, and three copies of all other submittals requested, all of which will be retained by the Project Engineer. Submit any additional copies that are to be returned.

2. Coordinate all submittals and review them for legibility, accuracy, completeness, and compliance with contract requirements. Forward submittals that are related to or affect one another as a package to facilitate coordinated review.

3. List submittals on a transmittal letter with date of submittal and content of submittal. Transmittal letter shall be on Contractor’s letterhead or other approved format. All submittals shall be uniformly transmitted.

4. Submittals will not be accepted for review if an incorrect amount of submittals are submitted, the transmittal form is incorrectly filled out, submittals are not coordinated, or submittals do not show evidence of Contractor’s approval.

B. Specific Procedures:

1. Shop Drawings: Identify each copy of shop drawings with contract drawing number in lower right hand corner.

2. Samples: Samples shall be large enough to illustrate clearly the functional characteristics and full range of color, texture, or pattern.

3. Manufacturer’s Literature: Submit only pertinent pages; mark each copy of standard printed data to identify products referenced in specification section.

4. Materials: Submit Certificates of for materials incorporated into the project.

5. Pre-fabricated components: Submit in accordance with Section 13002.

C. Project Engineer’s Review:

1. After approving submittals, Project Engineer will return Contractor’s copies.

2. If submittals are not approved, Project Engineer will return all copies to

Contractor with reasons for rejection. Resubmit, identifying changes.

3. Any work done before approval shall be at Contractor’s own risk.

1.3 APPROVED EQUALS AND SUBSTITUTIONS:

A. For each item proposed as an ‘approved equal’, submit a separate request. With each request, submit supporting data, including:

1. Drawings and samples as appropriate.

2. Comparison of the qualities of the proposed item with that specified.

3. Changes required in other elements of the work because of the substitution.

4. Name, address and telephone number of vendor.

5. Manufacturer’s literature regarding installation, operation and maintenance, including schematics for electrical and hydraulic systems, lubrication requirements, and parts lists. Describe availability of maintenance service, and state source of replacement materials.

B. A request for approval constitutes a representation that the contractor:

1. Has investigated the proposed item and determined that it is equal or superior in all respects to that specified.

2. Will provide the same warranties for the proposed item as for the item specified.

3. Has determined that the proposed item is compatible with interfacing items.

4. Will coordinate the installation of an approved item and make all changes required in other elements of the work because of the substitution.

5. Waives all claims for additional expenses that may be incurred as a result of the substitution.

C. New Construction Materials: The Contractor is encouraged to submit for approval products made out of recycled or environmentally-responsible material.

1.4 MANUFACTURER’S INSTALLATION INSTRUCTIONS: When contract documents require compliance with manufacturer’s printed instructions, provide one complete set of instructions for the Project Engineer and keep another complete set of instructions at the project site until substantial completion.

PART 3 - EXECUTION

Not Used.

PART 4 - MEASUREMENT AND PAYMENT

4.1 SUBMITTALS: Payment will be included in the schedule of items for which this work relates. No separate measurement and payment shall be made.

SECTION 01530

BARRIERS

1.1 DESCRIPTION: The work of this section consists of furnishing, installing and maintaining construction barriers to protect existing facilities and the public from construction operations, when construction zones remain open for public use.

2.1 GENERAL: Material may be new or used, but shall be suitable for intended purpose.

Fences and barriers shall be structurally adequate and neat in appearance.

2.2 BARRICADES AND SIGNS: Manual on Uniform Traffic Control Devices (MUTCD), Part VI, 2009 edition.

2.3 LUMBER: Free of nails, large knotholes and splinters.

2.4 BARRIER TAPE: Banner Guard, imprinted with ‘CAUTION: CONSTRUCTION

AREA’, manufactured by Reef Industries, Inc., Houston, Texas, or approved equal.

PART 3 - EXECUTION

3.1 PROTECTION OF PUBLIC:

A. Fence, barricade, or otherwise block off the immediate work area to prevent unauthorized entry.

B. Erect and maintain barricades, lights, danger signals, and warning signs in accordance with MUTCD-2009.

C. Adequately barricade and post open cuts in or adjacent to thoroughfares.

D. Protect pedestrian traffic by guardrails or fences.

E. When pedestrian traffic is detoured onto a roadway, provide temporary walkways with protection as required at ends and overhead. For walkways, use lumber running parallel to direction of traffic movement and provide ramps at changes of elevation.

F. Cover pipes, hoses and power lines crossing sidewalks and walkways with troughs using beveled edge boards.

G. Erect and maintain sufficient detour signs at road closures and along detour routes.

3.2 BARRIER TAPE: Install where directed by the Project Engineer. Keep a minimum of two rolls on site at all times.

3.3 REMOVAL: Completely remove barriers no longer needed when approved by the

Project Engineer.

PART 4 - MEASUREMENT AND PAYMENT

4.1 BARRIERS: Payment will be included in the schedule of items under items requiring barriers. No separate measurement and payment will be made.

SECTION 01900

MOBILIZATION

1.1 DESCRIPTION: This work shall include preparatory work and operations necessary for the movement of personnel, equipment, supplies and incidentals to the project site, and for all other work and operations that must be performed prior to beginning work on various items on the project. This work also includes washing and treating construction equipment and vehicles necessary for equipment transport to remove seeds, plants, and plant fragments before the equipment is used on Forest Service lands, according to the requirements within.

Not used.

PART 3 - EXECUTION

3.1 EQUIPMENT CLEANING REQUIREMENTS: Wash the sides, tops, and undercarriages of all construction equipment. Remove all seeds, plants, plant fragments, dirt, and debris from the construction equipment. Only equipment inspected by the Forest Service will be allowed to operate within the project area. All subsequent move-ins of equipment to the project area will be treated in the same manner as the initial move-in. This requirement does not apply to cars, pickup trucks, and other vehicles that regularly travel between the construction site and areas off the National Forest.

Equipment will be considered free of soil, seed, and other such debris when a visual inspection does not disclose such material. Disassembly of equipment, components or the need for specialized inspection tools is not required.

Notify the CO in writing at least 72 hours before moving any construction equipment onto the national forest. Notification will include an agreed upon location where the equipment will be available for inspection by the Forest Service. Inspection will be required after every cleaning.

PART 4 - MEASUREMENT AND PAYMENT

4.1 MEASUREMENT: Shall be lump sum for the job.

4.2 PAYMENT: Progress payments shall be made as follows:

A. When 5 percent or more of the original contract amount is earned from other pay items, 50 percent of the amount for mobilization, or 5 percent of the original contract amount, whichever is less, will be paid.

B. When 10 percent or more of the original contract amount is earned from other pay items, 100 percent of the amount for mobilization, or 10 percent of the original contract amount, whichever is less, will be paid.

C. Upon completion of all work on the project, any unpaid amount for mobilization will be paid.

The total of all payments, including bonding, shall not exceed the original contract amount for this item.

SECTION 02221

UTILITY TRENCHING AND BACKFILLING

1.1 DESCRIPTION: The work of this section consists of trenching and backfilling for the construction and installation of pipelines.

1.2 QUALITY ASSURANCE:

A. All in place density testing will be by visual inspection.

Test locations will be selected at the discretion of the Project Engineer.

1.3 PROJECT CONDITIONS:

A. Arrange construction sequences to provide the shortest practical time that the trenches will be open to avoid hazard to the public and to minimize the possibility of trench collapse. Trenches in traffic areas shall be plated or otherwise protected from the public.

1.4 EXCAVATION CLASSIFICATION: Regardless of the nature of material excavated, all excavation will be considered unclassified.

PART 2 - PRODUCTS

2.1 GENERAL: All backfill material shall be approved before use and be free of cinders, ashes, ice, frozen soil, large hard clods, organic debris, or other deleterious items.

Trench excavation materials may be used as approved by the Project Engineer.

2.2 MATERIALS FOR SELECT BACKFILLING:

A. The class or type of backfill material shown on the plans and designated in these specifications shall meet the following criteria:

1. Class 1 Material: Three types of materials are acceptable; 1) naturally occurring (not crushed) rounded sand, 2) crushed sand, and 3) decomposed granite. All material shall be free from clay, organic, or other deleterious material, shall have a sand equivalent of at least 50, and shall meet the following percent passing by weight gradations:

Natural Crushed Decomposed Sieve Size Sand Sand Granite

1-1/2” 100 --- 3/4” 75-100 100 100 No. 4 55-100 75-100 75-100 No. 200 0-5 0-15 0-5

2. Class 2 Material: Select excavated earth, free from stones or lumps exceeding 1” in greatest dimension, vegetable matter, or other deleterious material.

3. Class 3 Material: Select excavated earth, free from stones or lumps exceeding 2” in greatest dimension, vegetable matter or other deleterious material.

4. Class 4 Material: Select excavated earth, free from stones or lumps exceeding 6” in greatest dimension, vegetable matter or other deleterious material.

5. Permeable Backfill Material: Hard, durable, clean gravel or crushed stone, free from organic material, clay balls, or other deleterious substance, conforming to one of the following grades:

Percentage Passing Sieve Size 1/2” 1-1/2” 2” -- 100 1-1/2” -- 95-100 3/4” 100 50-100 1/2” 95-100 3/8” 70-100 13-55 No. 4 0-55 0-25 No. 8 9-10 0-5

No. 200 0-3 0-3

6. Sand-Cement Slurry Backfill Material: Sand-cement slurry shall consist of washed sand, free from clay and organic material of which 100% will pass a ¾” screen, at least 75% will pass a No. 4 sieve and no more than 5% will pass a No.

200 sieve. The sand shall be mixed thoroughly with Type 1 or 2 cement, at a ratio of 1-1/2 sacks per cubic yard of sand and enough water to accommodate mixing and placing.

3.1 TRENCH CLEARING:

A. The maximum width of clearing for utility trenches shall be 2 feet unless otherwise directed by the Project Engineer. Trench spoils shall not be placed over or around un-cleared vegetation unless specifically approved by the Project Engineer.

3.2 TRENCH EXCAVATION:

A. This work shall consist of pipe trench excavation regardless of character of surface and subsurface conditions including location of underground facilities, blasting, over-excavating and shoring.

1. Trench Configuration (not adjacent to existing waterline): The trench shall be excavated to allow the pipe to be aligned in the approximate center. Trench widths shall permit the pipe to be laid and joined properly and to allow for proper placement and compaction of backfill material. In no case shall the trench width be less than the pipe O.D. plus 14 inches. The trench sidewalls shall be as near vertical as possible, except where sloping is permitted by the Project Engineer.

The trench bottom shall provide a firm, uniform and continuous bedding for the pipe. Mounding of trench bottom to support pipe will not be allowed.

2. Trench Configuration (adjacent to existing waterline): The trench shall be excavated to allow the pipe to be aligned adjacent to the existing 3” Callahan or USFS waterline. Trench widths shall permit the pipe to be laid and joined properly and to allow for proper placement and compaction of backfill material.

In no case shall the trench width be less than the pipe O.D. plus 8 inches. The trench sidewalls shall be as near vertical as possible, except where sloping is permitted by the Project Engineer. When excavating in areas with chip seal or asphalt surfacing the trench edges shall be saw cut.

3. Excavation (adjacent to existing Callahan waterline): Trenching is permitted with excavating equipment until sand backfill is encountered. Further excavation shall be by hand or other approved method only until the existing Callahan waterline is suitably exposed to permit the placing of the new waterline adjacent to it. Extra care shall be taken when excavating in areas of cross connections to adjacent homes. A supply of appropriate fittings and pipe shall be kept on site to effect repairs as soon as possible should a breach of the existing waterline occur.

4. Over Excavation (not adjacent to existing waterline): Trenches for all types of pipeline materials shall be over excavated to provide for a minimum 6-inch sand (class 1) bedding.

Trenches in areas of underground water shall be over excavated to allow for 6 inches or more of permeable backfill, as required for Pipe Trench Backfill, as described elsewhere in this section.

Any areas of trench over excavated beyond the lines and grades shown on the plans or specified herein shall be brought back up to proper grade using suitable materials as approved by the Project Engineer. This material shall be compacted to the specified degree prior to placing any pipe or sand bedding in the trench.

3.3 SHORING AND SHEETING: Construct and maintain all shoring, sheeting, barricades, and slope layback necessary to protect the excavation, as needed for the safety of the employees and as required by applicable State and Federal laws.

3.4 BACKFILLING:

A. Native material removed from the trench may be used for backfill material provided it meets all of the requirements set forth on the plans and in these specifications.

Native backfill material may be mechanically screened to meet these requirements.

B. Contractor shall import the type and quantities of backfill materials not found on the job site at his own cost.

C. Compaction: Use vibratory compactors for sands and gravels (noncohesive soils).

Use mechanical tampers for sand and gravel containing a significant portion of fine-grained material, such as silt and clay (cohesive soils). Hand tamp around pipe or cable to protect the lines until adequate cushion is attained. Puddling or water flooding for consolidation of backfill or compaction by wheel rolling with construction equipment will not be permitted. Backfill shall exceed the density of the surrounding embankment.

D. Utility Installation: Shape the trench bottom to ensure uniform contact with the full length of the installed line and remove any sharp-edged materials that might damage the line. Compaction shall be maintained beneath the line.

E. Select Backfill: Fill by hand placement around the utility to just over half depth, and compact in a manner to ensure against lateral or vertical displacement. Place select backfill to 6 inches above the utility line by hand placement in not more than 6-inch layers. Compact each layer to exceed the density of the surrounding embankment.

G. All utilities shall be marked in accordance with Section 02229.

3.5 SURFACE FINISH WORK:

A. Open Areas and Roads: Grade all disturbed areas to a finish ordinarily obtained from a blade grader, with no abrupt changes in grade or irregularities that will hold water.

B. Clean-Up: Prior to final inspection and acceptance, remove all rubbish and excess material for disposal as approved, and leave area in a neat, satisfactory condition.

PART 4 - MEASUREMENT AND PAYMENT

UTILITY TRENCHING AND BACKFILLING: Payment shall be as shown in Bid Schedule under ‘Site Utilities” and includes all trenching, bedding, utility line and installation, and backfill to finish grade.

4.1 MEASUREMENT: Measurement shall be as shown in the schedule of items.

SECTION 02229

UTILITY LINE MARKING

1.1 DESCRIPTION: The work of this section consists of furnishing and installing utility line marking.

1.2 SUBMITTALS: As specified in Section 01300.

A. Samples: 24-inch strips of tape and two markers.

B. Certification that the materials used in the tape fabrication meet the requirements of this section.

PART 2 - PRODUCTS

2.1 MARKING TAPE: Capable of being inductively detected electronically.

A. Construction: Metallic foil laminated between two layers of impervious plastic film not less than 3 inches wide. Total thickness of tape shall not be less than 0.005 inch (5 mil) plus or minus 10 percent manufacturing tolerances.

1. Film: Inert plastic. Each film layer shall be not less than 0.0005 inch thick (0.5 mil).

2. Foil: Not less than 0.00035 inch thick (0.035 mil).

3. Adhesive: Compatible with foil and film.

B. Imprint: 3/4-inch or larger bold black letters.

C. Legend: Identify buried utility line tape with imprint such as ‘Caution: Water Line

Below’. Repeat identification at approximately 24-inch intervals.

D. Background Color: APWA color code and as specified below:

Color Utility

Safety Precaution Blue Water System

E. Manufacturer: Lineguard, Inc., Wheaton, Illinois; Reef Industries, Inc., Houston, Texas; Thor Enterprises, Inc., Sun Prairie, Wisconsin; or approved equal.

3.1 MARKING TAPE:

A. Install tape in backfill directly over each buried utility line as shown on the drawings.

Place tape during final backfilling.

B. Tape shall be continuous along the entire length of the waterline and shall be extended 2’ into the utility boxes at the terminal ends.

PART 4 - MEASUREMENT AND PAYMENT

4.1 UTILITY LINE MARKING: Payment will be included in the schedule of items for the utility, which this work relates to.

SECTION 02660

WATER DISTRIBUTION SYSTEM

PART 1 GENERAL

1.1 SCOPE:

A. This work consists of furnishing and installing a new potable water line as shown on the drawings and specified in this contract.

1.2 CODES AND STANDARDS:

A. In addition to the Codes and Standards listed under Section 01060, Regulatory

Requirements, work performed under this section shall meet the requirements of the following:

1. Uniform Plumbing Code (latest) Edition.

2. National Sanitation Foundation (NSF)

3. American Society for Testing and Materials (ASTM)

4. International Association of Plumbing and Mechanical Officials (IAPMO)

5. American Water Works Association (AWWA)

a. AWWA Manual M20, "Water Chlorination, Principles and Practices."

b. AWWA Standard C-601-68.

1.3 LICENSED CONTRACTOR

A. All work under this section shall be performed by a licensed general contractor for the installation of underground utilities with a minimum of 3 years experience in installing HDPE pipe.

2.1 PIPE AND FITTINGS:

A. All materials shall be new, of size, material, and type called for in these specifications and shown on the drawings.

1. HDPE PIPE – 4 Inch, rated 160 PSI - Pipe shall be manufactured from a PE 3408 resin listed with the Plastic Pipe Institute (PPI) as TR-4. The resin material will meet the specifications of ASTM D3350 with a cell classification of PE:345464C. Pipe shall have a manufacturing standard of ASTM F714. Pipe O.D. sizes 4” to 24” shall be available in both steel pipe sizes (IPS) and ductile iron pipe sizes (DIPS). Pipe O.D. sizes 26” to 54” shall be available in steel pipe sizes (IPS). Pipe shall be DR 17 (100psi WPR) for pipe sizes up to 36” unless otherwise specified on the plans. The pipe shall contain no recycled compounds except that generated in the manufacturer's own plant from resin of the same specification from the same raw material. All pipes shall be suitable for use as pressure conduits, listed as NSF 61, and per AWWA C906 Pressure Class (PC) 100 have a nominal burst value of three and one-half times the Working Pressure Rating (WPR) of the pipe. Peak flow water velocity of 5 ft/sec shall be used in the hydraulics engineering design.

2. FITTINGS

a) Butt Fusion Fittings - Fittings shall be PE3408 HDPE, Cell Classification of 345464C as determined by ASTM D3350-02, and approved for AWWA use.

Butt Fusion Fittings shall have a manufacturing standard of ASTM D3261.

Molded & fabricated fittings shall have a pressure rating equal to the pipe unless otherwise specified in the plans. Fabricated fittings are to be manufactured using Data Loggers. Temperature, fusion pressure and a graphic representation of the fusion cycle shall be part of the quality control records. All fittings shall be suitable for use as pressure conduits, and per AWWA C906, have nominal burst values of three and one-half times the Working Pressure Rating (WPR) of the fitting.

b) Electrofusion Fittings - Fittings shall be PE3408 HDPE, Cell Classification of 345464C as determined by ASTM D3350-02. Electrofusion Fittings shall have a manufacturing standard of ASTM F1055. Fittings shall have a pressure rating equal to the pipe unless otherwise specified on the plans. All electrofusion fittings shall be suitable for use as pressure conduits, and per AWWA C906, have nominal burst values of three and one-half times the Working Pressure Rating (WPR) of the fitting.

c) Flanged and Mechanical Joint Adapters - Flanged and Mechanical Joint Adapters shall be PE 3408 HDPE, Cell Classification of 345464C as determined by ASTM D3350-02. Flanged and Mechanical Joint Adapters shall have a manufacturing standard of ASTM D3261. Fittings shall have a pressure rating equal to the pipe unless otherwise specified on the plans.

2.2 MARKING TAPE

See Section 02229

2.3 VALVES

A. Valves and valve boxes shall be new, of size, material and type shown on the drawings or specified herein. All valves shall be equipped with handwheel or other operating devices.

1. SHUT-OFF VALVES: Ball Valve shall be 4” thermoplastic True Union 2000

Industrial type, Part # 1831-040 as manufactured by Spears Manufacturing Company, Sylmar, CA or approved equal. All valves shall have Safe-T- Shear stem with O-ring stem seal. All union nuts shall have Buttress threads and Vitron O- rings. Valves shall be pressure rated to 235 psi and certified by NSF International for use with potable water.

2.4 VALVE BOXES

A. Boxes shall be molded structural foam (plastic), 12” x 17” x 12” deep retangular with 6” extension and cover engraved “water”. Covers will be flush. Boxes shall be as manufactured by Carson Industries, LLC or equal.

PART 3: EXECUTION

3.1 GENERAL:

A. Pipe and Fittings: Size as indicated on the plans. Install as shown in accordance with manufacturer’s recommendations.

3.2 HAULING, UNLOADING and DISTRIBUTING PIPE:

A. During loading, transportation and unloading, every precaution shall be taken to prevent injury to the pipe. No pipe shall be dropped from cars or trucks, or allowed to roll down slides without proper retaining ropes. During transportation each pipe shall rest on suitable pads, strips, skids or blocks securely wedged or tied in place.

Any pipe damaged shall be replaced.

3.3 LAYING PIPELINE

A. Protection of pipe: All pipe and fittings shall be protected during storage and installation to prevent contamination. Care shall be taken during laying and joining to prevent dirt and other objectionable material from entering pipe. Cap or plug lines when work is not in progress.

B. No pipe shall be placed in the trench until the trench subgrade and bedding have been inspected and approved by the Government.

3.4 VALVE INSTALLATION

A. The valve shall be installed in the location as shown on the drawings and in accordance with the manufacturer's recommendations. The final assembly, including pipe and fittings, shall be tested and disinfected in accordance herein.

B. Unless otherwise indicated on the drawings or in vertical lines, valve handles or levers shall be on top.

C. All valves shall be supported and braced as necessary to provide full support and prevent movement during normal operation. It shall be the responsibility of the Contractor to design, fabricate and install the necessary supports and bracing. All valves shall be placed upon a bed of drain rock material, 6 inch maximum thickness.

D. Each valve, its fittings and appurtenances, shall be kept free of dirt or other foreign materials. Each valve shall be tested for leakage and operation during the system tests.

E. Valve enclosures shall be centered over valves and other appurtenances. Adequate clearance shall be provided between the enclosure and pipelines, valves and appurtenances. Sectional or stacked units shall be permanently assembled. The enclosures shall be installed in such a manner to prevent settlement or other movement after installation. In final position the box shall be 1/2 inch minimum above surrounding finish grade and there shall be a minimum of 1/2 inch clearance between the box and the pipeline at any point.

3.5 EXCAVATION AND TRENCHING: Section 02221

3.6 FUSION:

A. Sections of polyethylene pipe should be joined into continuous lengths on the jobsite above ground. The joining method shall be the butt fusion method and shall be performed in strict accordance with the pipe manufacturer's recommendations. The butt fusion equipment used in the joining procedures should be capable of meeting all conditions recommended by the pipe manufacturer, including, but not limited to, temperature requirements of 400 degrees Fahrenheit, alignment, and an interfacial fusion pressure of 75 PSI. The butt fusion joining will produce a joint weld strength equal to or greater than the tensile strength of the pipe itself. All welds will be made using a Data Logger to record temperature, fusion pressure, with a graphic representation of the fusion cycle shall be part of the Quality Control records.

B. Sidewall fusions for connections to outlet piping shall be performed in accordance with HDPE pipe and fitting manufacturer’s specifications. The heating irons used for sidewall fusion shall have an inside diameter equal to the outside diameter of the

HDPE pipe being fused. The size of the heating iron shall be ¼ inch larger than the size of the outlet branch being fused.

C. Mechanical joining will be used where the butt fusion method cannot be used.

Mechanical joining will be accomplished by either using a HDPE flange adapter with a Ductile Iron back-up ring or HDPE Mechanical Joint adapter with a Ductile Iron back-up ring.

D. Socket fusion, hot gas fusion, threading, solvents, and epoxies will not be used to join HDPE pipe.

3.7 INSPECTION: Inspect the pipe for defects before installation and fusion. Defective, damaged or unsound pipe will be rejected.

3.8 TESTING: Pressure testing shall be conducted in accordance with ASTM F2164, Field Leak Testing of Polyethylene Pressure Piping Systems Using Hydrostatic Pressure. The HDPE pipe shall be filled with water, raised to test pressure and allowed to stabilize. The test pressure shall be 1.5 times the operating pressure at the lowest point in the system.

In accordance with section 9.8, the pipe shall pass if the final pressure is with 5% of the test pressure for 1 hour. For safety reasons, hydrostatic testing only will be used.

3.9 DISINFECTION METHOD

A. After being tested and before being placed into service, the water system shall be disinfected with chlorine. The system shall be filled with a chlorine solution of 50 parts per million chlorine and left to stand a minimum of 24 hours.

3.10 FINAL FLUSHING

A. Following chlorination, all treated water shall be thoroughly flushed from the newly laid waterline. Flushing shall continue until the free available chlorine level is one milligram per liter or less.

PART 4 – MEASUREMENT AND PAYMENT

A. Water distribution system measurement and payment shall be as shown in the schedule of items under ‘Site Utilities.’