B09_Attachment_45_-_33_14_16___Site_Water_Utility_Distribution_0007.pdf

HAVO – 305150B 33 14 16 - 1

8/8/24 SITE WATER UTILITY DISTRIBUTION

SECTION 33 14 16 – SITE WATER UTILITY DISTRIBUTION

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section.

1.2 SUMMARY

A. This Section includes the following:

1. Domestic water connection to new comfort station.

2. Fire service to the KVC building and new comfort station.

B. Related sections:

1. Section 31 20 00 – Earth Moving

1.3 SUBMITTALS

A. Product data: Pipe, fittings, valves, corporation stop, service saddle, water meter, and water meter box.

B. Manufacturer’s Certification: That products meet or exceed specified requirements.

C. Pipe testing reports.

D. All materials (pipe, lubricants, paints, sealants, form oil, concrete admixtures, etc.) in direct contact with the drinking water shall have National Sanitation Foundations (NSF) approvals. The contractor shall submit these approvals for review and approval prior to its application.

PART 2 - PRODUCTS

2.1 PIPE

A. Ductile Iron Pipe

1. Unless noted otherwise, ductile iron pipe shall conform to ANSI A-21.51 and AWWA C151.

2. Pipes shall be furnished in lengths not shorter than 18 feet or longer than 20 feet.

3. Ductile iron pipe shall be either mechanical joint, push-on joint, or flanged joint unless otherwise specified.

HAVO – 305150B 33 14 16 - 2

4. Ductile iron pipe shall be Class 52 for mechanical joint and push-on joint pipe and Class 53 for use with threaded flanges.

B. Insulated HDPE Pipe

1. Carrier Pipe: High Density Polyethylene (HDPE) Pipe:

a. High molecular weight, high density, polyethylene pipe, ASTM D3350

i. Cell Classification: 345464C

ii. Standard Dimension Ratio (SDR): 200 psi (SDR 11) working pressure under

ASTM D2837.

iii. Pipe shall be ductile iron pipe size.

iv. Submit manufacturer's certification, including affidavit of compliance that pipe and fitting complies with the Specifications.

v. Pipe shall be from straight sticks of pipe. Coiled HDPE pipe shall not be used.

vi. Carrier pipe shall be black, and stamped with appropriate SDR and ASTM designations.

vii. Pipe shall be certified to NSF-61 in accordance with all applicable provisions and requirements of the latest revision of AWWA C901 and AWWAC906.

b. Joints: Butt fusion, ASTM D2657, except mechanical where required to connect with other pipe, valve or equipment materials.

i. Butt Fusion Joints: The tensile strength of the joint at yield shall not be less than the pipe. Joints shall be made with equipment acceptable to the pipe manufacturer. The equipment operators shall have been trained by certified fusion technicians. Submit description of the equipment and methods for favorable review.

c. Fittings: Molded fittings to ASTM D3261 required where available of the same material as the pipe, with DR no greater than the pipe, and with a pressure rating at least equal to the pipe. Fabricated fittings shall comply with AWWA C901, AWWA C906 and ASTM F2206 and shall only be used where molded fittings are unavailable.

2. Insulation between carrier pipe and HDPE outer jacket of all pipe and fittings shall be polyisocyanurate foam with minimum 3.5” thickness. It shall be applied and cured in accordance with manufacturer’s recommendations.

a. Polyisocyanurate foam shall exhibit the following properties and characteristics specified by the referenced ASTM tests below:

i. Maximum K-factor = as produced 0.17 btu-in/hr-ft2-degrees F at 75 degrees F and 0.30 at 366 degrees F in accordance with ASTM C518 and meets the requirements of ASTM C591.

HAVO – 305150B 33 14 16 - 3

ii. Core Density Range = minimum 2.7 lbs/ft3, accordance with ASTM D1622

iii. Minimum Compressive Strength (Parallel and perpendicular to pipe axis) = 30 psi, in accordance with ASTM D1621

iv. Maximum Water Absorption = 0.05 lb/ft3 in accordance with ASTM D2842

v. Dimensional Stability (Maximum Linear Change) = 1% at -20°F and 3% at +100°F in accordance with ASTM D2126.

b. Exposed polyisocyanurate foam faces at pipe and fitting ends shall be coated to protect against physical abuse, UV exposure during shipping and storage, and against water intrusion in service. The coating shall be suitable for direct application over polyisocyanurate foam with no deleterious effects to the foam or coating. The coating shall be formulated for long-term service and retained flexibility over extended periods of exposure to sunlight, harsh weather, and saltwater spray. The strength of the adhesive bond of the coating to the foam shall be greater than the tensile strength of the coating. In the event the coating is nicked or an edge is rolled up in handling, the coating that has been dislodged shall tear free from the coating still adhering to the foam rather than pull the balance of the coating off as a sheet.

i. The coating shall be applied and cured in accordance with the manufacturer's recommendations.

ii. The coating material shall exhibit the following properties and characteristics:

1. ASTM E398 or E96 Maximum Water Vapor Permeance: 1.0 perm

2. Dry Film Thickness Range: 15 to 63 mils

3. HDPE outer jacket for pipe and fittings shall be constructed from HDPE in accordance with ASTM D3350 and ASTM D-1248. The wall thickness shall be minimum 175 mils thick.

The joints in the HDPE outer jacket for fittings shall be butt fused when possible and extrusion welded where required an 80 mil polyurea jacket may be substituted with approval.

The joints in the HDPE outer jacket fabricated around fittings shall be welded with a continuous bead, resulting in a finished jacket that is watertight.

a. The HDPE outer jacket of all pipe and fittings shall be watertight under a five-foothead of water and shall present a relatively smooth, flat overall appearance.

b. All surfaces of the HDPE outer jacket, including end-cuts and welds, shall be finished such that no jagged edges exist that could cause personal injury.

c. The interior of the jacket shall be free of oils, grease, or other residue that could interfere with the adhesion of insulation to the outer jacket.

d. The HDPE outer jacket and insulation for carrier pipe fittings shall be factory insulated.

C. Service laterals

HAVO – 305150B 33 14 16 - 4

1. Polyethylene Tubing

a. PE tubing shall conform to all applicable requirements of the following standards, unless otherwise specified in these Standards:

i. AWWA C901 - Standard for Polyethylene (PE) Pressure Pipe, Tubing, and Fittings, ½-inch through 3-inch, for Water.

ii. ASTM D1248 - Specification for Polyethylene Molding and Extrusion Materials.

iii. ASTM D2737 - Specification for Polyethylene Plastic Tubing.

b. PE tubing shall be manufactured from ultra-high molecular weight polyethylene, meeting the requirements of ASTM Material Classification PE3408. PE tubing shall meet the requirements of Type III, Class C, Category 5-P34 as defined by ASTM D1248. PE tubing shall be made from all virgin material approved for potable water service by the National Sanitation Foundation (NSF) and shall conform to ASTM D2737. PE tubing shall not fail, balloon, burst, or weep as defined in ASTM D1598 when tested in accordance with the sustained pressure test method of ASTM D2737.

c. PE tubing shall be rated for use with water at 73.4ºF at a hydrostatic design stress of 630 psi and a minimum pressure class of 200 psi.

d. PE tubing shall have a Dimension Ratio (DR) of 9.

e. All PE tubing shall be permanently imprinted with manufacturer's brand name or trademark, pipe size, identification of National Sanitation Foundation approval, ASTM Specification No., maximum working pressure and production code.

f. PE tubing shall be packaged for protection against sunlight, dirt, and damage during shipment, handling and storage. Packages shall be fully labeled with brand name and manufacturer, NSF seal, size, and coil length.

2.2 FITTINGS

A. Ductile Iron

1. Ductile iron and cast iron fittings and special castings shall comply with ANSI A-21.10 and AWWA C110 and have mechanical joints or flanged joints and shall be all bell (without spigot or plain ends) unless otherwise specified.

2. Fittings shall be either mechanical joint or flanged joint only.

a. Mechanical Joint

i. Mechanical joints shall conform with all provisions of ANSI A-21.11 and AWWA C111, "Rubber-Gasket Joints for Ductile Iron Pressure Pipe and Fittings".

HAVO – 305150B 33 14 16 - 5

ii. Mechanical joint pipes and fittings shall be furnished complete with gaskets, glands, bolts, and nuts.

iii. Ductile iron MJ glands shall be straight-sided polygon in shape. Ductile iron thickness shall be the same as gray (cast) iron dimensions in AWWA C111.

Glands shall be full-bodied from and between bolt holes. Scalloped or reduced metal gland section glands are not permitted.

iv. Silicon bronze (ASTM F467 and F468) or stainless steel (ASTM F593 and F594, type 316) bolts and nuts shall be used for all mechanical joints. All bolts and nuts shall be silicon bronze only if submerged in water. All stainless steel bolt and nut threads shall be pre-coated with anti-seizing graphite compound before installation.

v. Gaskets shall be vulcanized natural or vulcanized synthetic rubber, free of porous areas, foreign materials, and visible defects. No reclaimed rubber shall be used.

vi. Bolt holes shall straddle the vertical centerline.

vii. Mechanical joint fittings shall be manufactured in accordance with ANSI A-

21.10 and AWWA C110.

viii. The mechanical joint fittings shall be Class 250 or 350 as called for in the proposal or designated on the plans equal to or exceeding the class of the ductile iron pipe to be installed.

ix. Mechanical joint fittings may be manufactured in accordance with AWWA C153, compact fittings.

b. Flanged Joint

i. Flanged pipes and fittings shall be furnished complete with gaskets, bolts, and nuts.

ii. Threaded flanged pipes shall conform to AWWA C115.

iii. Flanges shall be faced and drilled in accordance with ANSI B-16.1, Class 125, rated for 150 to 200 psi or Class 250, rated for 250 psi. Bolt holes shall straddle the vertical center line.

iv. Gaskets shall be "full face" 1/16-inch thick, duck-inserted rubber packing, Garlock No. 19, "half-face" 1/8-inch thick "FLANGE-TYTE" gasket, or approved equal.

v. The bolts used for all flanged joints shall protrude beyond the nuts a minimum of 1/8-inch but shall not exceed 1/2-inch. All stainless steel bolt and nut threads shall be pre-coated with anti-seizing graphite compound before installation. Should the bolts protrude more than 1/2-inch, the bolt ends shall be machine cut before installation. Bolts shall be with cut threads and American Standard heavy hexagon heads. Nuts shall be compatible with the

HAVO – 305150B 33 14 16 - 6

bolts in strength and material characteristics. Nuts shall be hexagon. Bolts and nuts for flanges shall conform to one of the following:

vi. Silicon bronze bolts and nuts shall conform to ASTM F467 and F468.

vii. Stainless Steel bolts and nuts shall conform to ASTM F593 and F594, type 316.

viii. Flanged fittings shall be Class 250 or 350.

ix. Fittings shall conform with ANSI A-21.10 and AWWA C110.

x. All flanged fittings and special castings shall have integral flanges and shall be sand cast.

B. Insulated HDPE

1. All fittings shall be HDPE, factory insulated and fusion welded to the HDPE service pipe and shall be sealed to the outer jacket. Field installed fittings shall be insulated and sealed.

2. After thermal butt fusion welding and hydrostatic testing of the carrier pipe, HDPE jacketed straight field joints shall be insulated with polyurethane foam half-shells to the thickness specified, and sealed water-tight with a heat-shrink sleeve.

C. Service laterals

1. Fittings used for polyethylene tubing shall be either compression or stab type. Stab type fittings shall utilize an internal grip ring and O ring seal. Stainless steel liners shall be used when utilizing compression fittings on polyethylene tubing.

2.3 VALVES

A. Gate Valves

1. General

a. Valves shall have non-rising stems, unless otherwise specified, with inside screw and shall open to the left or counter-clockwise.

b. Valves shall have the manufacturer's name, size, catalog number, and working pressure molded or stamped thereon in places where the name and number may be easily seen when the valves are installed. External surfaces of valves shall be shop coated with fusion-bonded epoxy coating or with two coats of an asphalt coating conforming to Federal Specifications TT-C-494B. Valves shall be furnished complete with all accessories.

c. Mechanical joint and flanged joint for gate valves shall be in accordance with all applicable requirements specified for joints.

d. All valves shall be for buried service unless otherwise specified.

HAVO – 305150B 33 14 16 - 7

e. Stuffing box bolts and nuts, bonnet bolts and nuts, and gland or flange bolts and nuts shall be Silicon Bronze in accordance with ASTM F467 and F468 or may be ASTM F593 and F594, type 316 stainless steel bolts and nuts. All stainless steel bolt and nut threads shall be pre-coated with anti-seizing graphite compound before installation.

f. All valves shall be full body and not thin-walled or reduced walled-type.

g. For working pressures of 200 psi or less, all gate valves 4-inches to 12-inches shall be resilient seat type of gate valve. For working pressures greater than 200 psi or when the gate valve size is larger than 12-inches, the gate valve shall be the metal-seated type.

2. Valves Three (3)-inch and Smaller.

a. Valves shall be of the wedge-disc type with non-rising stem, screw ends, and brass or bronze body.

b. Metal composition of the body, centerpiece, and other cast parts shall be bronze, meeting the requirements of ASTM B62.

c. All packing shall be Johns-Manville "Duro" packing style No. S-171 or approved equal, and shall have each ring cut to fit with staggered joints. Continuous (spiraled) packing shall not be used.

d. Valves shall be provided with brass handwheels and stuffing box glands. Unless otherwise specified, valves shall be for 200-pound water service.

3. Metal-Seated Valves Four (4)-Inch and Larger.

a. All metal-seated gate valves four (4)-inch and larger shall conform to AWWA C500 with cast iron body, bronze (not brass) mounted, double disc, and parallel seat and shall be furnished with 2-inch square operating nuts.

b. Valves shall be equipped with double O-ring stem seals with both rings located above the collar.

c. All valves except bevel geared gate valves shall operate "upright" (vertical in horizontal pipe).

d. Bevel geared gate valves shall operate on "edge" (horizontal in horizontal pipe) and shall be equipped with solid bronze rollers, tracks, and scrapers.

e. Valves shall be either Class 150, Class 200, or Class 250. Class 250 valves shall be designed for 250 pounds working pressure and tested to 400 pounds.

f. All bolts and nuts shall be either silicon bronze (ASTM F467 and F468) or stainless steel (ASTM F593 and F594, type 316).

g. All bolts and nuts shall be silicon bronze only if submerged in water.

h. Bolts and nuts installed shall be compatible in strength and material characteristics.

HAVO – 305150B 33 14 16 - 8

i. Bolts shall protrude beyond the nuts and protrusion shall be a minimum of 1/8-inch but shall not exceed 1/2-inch.

j. All stainless steel bolt and nut threads shall be pre-coated with anti-seizing graphite compound before installation.

k. Dimensions of bolting material shall meet ANSI B18.2.1 specifications.

l. Bolting of the valve body parts shall be by bolts and nuts. Tapped bolt holes into the valve body are unacceptable.

4. Resilient-Seated Gate Valves

a. Resilient-seated gate valves shall be manufactured to meet all applicable requirements of AWWA C509, "Resilient-Seated Gate Valves For Water And Sewerage Systems".

b. Valves shall be either 4, 6, 8, or 12-inch in size and rated for service at 200 psi working pressure.

c. Valves shall have non-rising stems, opening by turning left and provided with 2-inch square nut with arrow cast in metal to indicate direction of opening.

d. Each valve shall have manufacturer's name, pressure rating and year in which manufactured cast on the body.

e. All bolts and nuts shall be either silicon bronze (ASTM F467 and F468) or stainless steel (ASTM F593 and F594, type 316).

f. All bolts and nuts shall be silicon bronze only if submerged in water.

g. Bolts and nuts installed shall be compatible in strength and material characteristics.

h. Bolts shall protrude beyond the nuts and protrusion shall be a minimum of 1/8-inch but shall not exceed 1/2-inch.

i. All stainless steel bolt and nut threads shall be pre-coated with anti-seizing graphite compound before installation.

j. Dimensions of bolting material shall meet ANSI B18.2.1 specifications. Bolting of the valve body parts shall be by bolts and nuts.

k. Tapped bolt holes into the valve body are unacceptable.

l. Stuffing boxes shall be of an O-ring design with a minimum of three O-rings. No gasket material made of asbestos shall be used.

m. Interior and exterior coating shall be fusion epoxy meeting AWWA C550, "Standard For Protective Interior Coatings For Valves and Hydrants".

n. Stem shall be bronze meeting the requirements of Grade D or Grade E Bronze as specified in AWWA C509.

HAVO – 305150B 33 14 16 - 9

o. Low friction torque reduction thrust bearings shall be located both above and below the stem collar.

p. If guides for the gate are required, there shall be no metal-to-metal contact, only metal-to-rubber.

2.4 WATER METER BOX

A. For concrete boxes, the cement shall be Portland cement conforming to ASTM C150, Type I.

Fine and coarse aggregates shall conform to ASTM C33 or C330. Mixing water shall be clean and free from injurious amounts of oils, acids, alkalis, organic materials, or other deleterious substances. An admixture which increases durability and reduces permeability, and when used properly is in no way detrimental to the concrete, may be used. The combined aggregates shall be of such composition of sizes so that the surface of the finished product shall be continuous and of a uniform texture.

B. The maximum density of the concrete in the finished product shall be 115 pounds per cubic foot and the maximum absorption shall be 15 pounds per cubic foot. The compressive strength of the concrete shall be at least 2500 psi.

2.5 CAST IRON LIDS, COVERS, AND FRAMES

A. General

1. Cast iron for frames and covers shall conform to ASTM A48.

2. All castings shall be of tough, close-grained, gray iron, sound, smooth, clean, and free from blisters, blowholes, shrinkage, and cold shuts.

3. Allowance shall be made in the patterns so that the finished castings shall have the specified dimensions.

4. The seats of valve box frames and covers shall be machined, not ground, to secure FLAT AND TRUE SURFACES. Castings for Cover and Reading Lid seats shall be chipped and ground where necessary to secure FLAT AND TRUE SURFACES.

5. All castings shall be thoroughly cleaned and painted before leaving the shop with one coat of high-grade asphaltum.

B. Valve Box Covers and Frames and Standpipes

1. The minimum weight for valve box covers shall be 10 pounds. The minimum weight for frames shall be 40 pounds.

2. Valve box standpipes shall be either cast iron pipe, reinforced concrete pipe, PVC pipe, or approved equal.

2.6 SERVICE SADDLE

A. General

HAVO – 305150B 33 14 16 - 10

1. Casting shall be coated with fusion bonded black nylon, 10-14 mils thick, with a dielectric strength of 1,000 v/mil.

2. Working pressure up to 150 psi.

B. Saddle body

1. Cast from ductile (nodular) iron, meeting or exceeding ASTM A 536, Grade 65-45-12.

C. Gasket

1. NSF 61 approved Nitrile Butadiene Rubber (NBR) compounded for water and sewer service and a tolerance of petroleum products in accordance with ASTM D 2000 MBC 610.

D. Straps

1. Type 304 (18-8) heavy gauge Stainless Steel, two inches wide to spread out clamping forces on the pipe.

2. GMAW and GTAW welds.

3. Passivated for corrosion resistance.

E. Bolts and nuts

1. 5/8" UNC roll thread Type 304 (18-8) Stainless Steel bolts with heavy hex nuts.

2. All welds fully passivated for enhanced corrosion resistance.

3. Coat nuts to prevent galling.

F. Washers

1. 5/8" flat, type 304 (18-8) heavy gauge Stainless Steel and plastic washer to prevent galling.

2.7 DOUBLE CHECK VALVE ASSMEBLY

A. Reduced pressure principle assembly shall meet or exceed AWWA C511 and be on the List of Approved Backflow Prevention Assemblies published by the Foundation for Cross-Connection Control and Hydraulic Research a Division of the University of Southern California.

2.8 DOUBLE CHECK-DETECTOR ASSMEBLY

A. Double check-detector assembly shall be on the List of Approved Backflow Prevention Assemblies published by the Foundation for Cross-Connection Control and Hydraulic Research a Division of the University of Southern California.

HAVO – 305150B 33 14 16 - 11

PART 3 - EXECUTION

3.1 GENERAL

A. Prior to trenching for pipeline or any other water system installation, all A.C. and concrete pavement shall be “saw-cut” to the specified width. Prior to repaving of trenches, all A.C. and concrete shall be "saw-cut" to the required width prior to repaving of trenches. The required width shall include areas damaged or otherwise disturbed by the Contractor.

B. Prior to trenching for pipelines, and wherever a connection to an existing main is shown on the plans, the Contractor shall expose the existing main to verify the alignment and grades. This work shall be done sufficiently in advance of the trenching so that if any changes in the alignment or grade for the proposed water mains are required.

C. If the materials at the pipe invert are found to be unstable, notify the CO so appropriate measures shall be taken.

D. In the field and prior to installation, the Contractor shall thoroughly and visually inspect all pipe and appurtenances for surface defects such as cracks, cuts, abrasions or punctures. The Contractor shall assume full responsibility for the soundness of the pipe and appurtenances installed.

E. Any defective pipe or appurtenances, which have been installed, shall be removed and replaced.

F. Pipe shall not be laid on blocks or rocks.

G. All pipe and appurtenances shall be thoroughly cleaned and scraped of all foreign matter and protuberances and shall be kept clean until the assembling of the joint has been completed.

H. Should water, mud or any other foreign material enter any joint prior to the assembly of the joint, the joint thus affected shall be opened. The joint shall be thoroughly cleaned before the pipe or appurtenances are replaced and reset.

I. In sections where it is necessary to dewater the trench, the trench shall be kept free of water. No water shall enter the pipe. Should water enter the pipe, the inside shall be thoroughly cleaned before continuing with the installation. Should the trench become flooded after the pipe and appurtenances have been installed, the pipe and appurtenances shall be brought back to proper alignment and bearing and properly cushioned.

J. Warning tape shall be installed over the entire length of the pipe, bends and fittings.

K. Any material to be relocated as shown on the plans shall be removed, cleaned, painted and reinstalled at the new location by the Contractor unless otherwise specified. Any material to be salvaged as shown on the plans shall be removed, cleaned, and returned to the Park by the Contractor. Existing manholes, valve boxes or meter boxes and concrete reaction blocks to be demolished shall be done by the Contractor.

3.2 TRENCH EXCAVATION

A. No jumps or spaces between trenches will be permitted.

HAVO – 305150B 33 14 16 - 12

B. Unless otherwise specified, the trench widths for work on water mains and appurtenances shall be as shown below.

TRENCH WIDTH

Pipe Diameter (inches) Trench Width (inches)

Tubing < 4 12

4 24

6 24

8 24

12 24

C. Trench widths shall not be less than 12 inches.

D. For tubing smaller than 4 inches, the trench width of 12 inches shall not be allowed at soldered or mechanical connections and where to be installed at a depth more than 3 feet.

E. Where the water main is to be encased in concrete, the width of the trench shall be the width of the concrete jacket as shown on the plans plus 12 inches. If forming for the jacket is not required, the trench width shall equal the width of the concrete jacket. The depth of trench shall be to the bottom of the concrete jacket.

F. Depths of trenches for water mains and appurtenances, service laterals and service connections shall be to six inches below the invert grade shown on the drawings.

G. Should major tree roots 2-inches and greater in diameter be encountered during construction, these roots shall be cut and sealed with asphaltic paint.

H. Any part of the trench excavated beyond the specified depth shall be backfilled with pipe cushion materials and thoroughly compacted. This work shall be done by the Contractor at no additional cost to the Owner.

I. Enlargements for bell holes shall be made at all joints to provide sufficient space for completing the joints.

J. Where it is necessary for the Contractor to go through or under existing walls, masonry work and utilities, such structures shall be reconstructed to the original or better conditions at no additional cost to the Owner.

3.3 TRENCH BACKFILL

1. No "S4C" crusher screening shall be used for backfill and pipe cushion material in areas where the invert of the pipe is at or lower than the 4-foot elevation, USGS Datum, or in areas where the ground is wet.

HAVO – 305150B 33 14 16 - 13

2. Should dirt or debris fall into the trench at any time prior to or after the pipe cushion has been placed, the dirt or debris shall be immediately removed before proceeding with the backfill or compaction.

3. Before backfill is deposited, water shall be added to adjust the moisture content to optimal for compaction.

4. Warning tape shall be installed over centerline of the pipe, bends and fittings below the pavement structure or 12 inches from the finished grade unless otherwise specified on the construction plans along the entire length of trench.

B. Preparation of Trench Bottom

1. After the trench has been excavated to the proper depth of six inches below the invert grade, the trench bottom shall be backfilled to the required invert grade with pipe cushion material. Whether backfilled in this manner or not, the trench bottom shall be leveled off or shaped to obtain a smooth bed along the laying length of the pipe.

2. Wherever a firm foundation is not encountered at the bottom of the trench, the soft or otherwise undesirable materials shall be removed. The trench shall then be backfilled and compacted to within six inches of the pipe invert with trench stabilization material.

C. Prior to Testing

1. After cushion material has been placed on the trench bottom and mains, service laterals and service connections have been installed, pipe cushion material shall be deposited in the trench simultaneously on both sides of the pipe to the required height.

2. The joints of the pipe, other than concrete cylinder pipe, may remain exposed during the pressure test of the main unless the Contractor exercises the option to backfill the joints.

Whether the joints are backfilled or not, the Contractor shall be responsible to locate and stop any leakage that the pressure test may reveal.

D. After Testing

1. Upon completion of testing of mains and appurtenances, the following steps shall be observed unless otherwise specified:

a. For mains 12-inches and smaller, copper pipes, service laterals, service connections and appurtenances, backfilling may commence with pipe cushion material to 6 inches above the top of pipe. For pipe inverts below 4-foot elevation, USGS Datum or where water is encountered, backfilling with pipe cushion material shall continue to 12 inches above the top of pipe.

b. In the process of backfilling to the heights specified above the pipe, the cushion material shall be compacted with water using a 1½-inch nozzle curved to the circumference of the installed pipe and of sufficient length to reach the invert of pipe.

Compaction will be conducted in this manner along the entire length of pipe on alternate sides with each side compacted four times. Settlement greater than 1/6 the diameter of pipe will require additional material and compaction.

HAVO – 305150B 33 14 16 - 14

E. Completion of Backfill

1. After the trench has been backfilled with pipe cushion material to the height specified above, power equipment shall be used to complete the backfill.

2. Compaction of trench backfill shall meet applicable requirements in Section 31 20 00 – Earth Moving.

3. Before commencing power backfilling, a point in the trench shall be selected and backfilled by hand to within 12 inches of the top of the trench. The natural repose of this backfill will be in a slope running down the trench in both directions from the high point. Power equipment shall then deposit the backfill so as to cause the backfill to slide gently down the slopes as the work progresses. This power backfilling shall be carried to within 12 inches of the top of the trench. Materials used in this operation shall contain no stone, rock, concrete or other material larger than 6 inches in its greatest dimension and shall contain no vegetable matter or debris of any kind. No “cinders”, "adobe" or similar material shall be used. Compaction shall not be less than 95% of the material's maximum density as determined by latest edition of ASTM Test D-1557.

4. The remaining 12 inches of trench shall then be backfilled and tamped with approved pneumatic backfill tampers. Wherever the trenches are excavated below roadways, the above remaining 12 inches of trench shall be backfilled in accordance with Section 31 20 00 – Earth Moving.

5. The backfill shall be maintained at the proper grade until paving is completed.

6. In locations where pipe trench is excavated in existing pavement, the pavement shall be maintained at the proper grade by placing and compacting slow curing asphalt (SC-4) until the final repaving is completed.

F. Backfill at Valve Boxes

1. Prior to backfilling at those valve boxes where risers are required for the purpose of chlorinating the water mains, the Contractor shall install such risers. These risers including the necessary appurtenances shall be furnished by the Contractor.

2. After the risers have been installed, the region around these valve boxes may be backfilled temporarily.

3. Upon completion of the chlorination work, the Contractor shall backfill these areas permanently. Ball corp shall remain in place.

4. Materials for backfilling around the valves shall be black sand, sand, coral chips, or similar granular material.

3.4 DUCTILE IRON PIPE

1. Prior to the installation of the pipe, the circumference of the spigot ends shall be marked

HAVO – 305150B 33 14 16 - 15

showing the depth of the bell of the pipe.

2. After the trench bottom has been prepared, each pipe shall be laid so that the barrel of the pipe shall have bearing along its laying length with the bell end properly set to grade and alignment. The spigot end of the pipe shall then be centered and firmly embedded against the bell end of the pipe previously laid. There shall be uniform clearance around the bell. The pipe shall be firmly held in place by proper blocking on each side of the pipe.

3. No pipe "springing" or "buckling" into place between installed pipe or special castings shall be allowed.

4. Whenever it is required to cut ductile iron pipe 16-inches in diameter and larger, the pipe shall be saw cut.

5. All cut ends of the ductile iron pipe shall be ground even, free of all projections.

6. Whenever it is necessary to install pipe sleeves, the space between the ends of the adjoining pipes shall be filled by inserting a full ring piece. The filler piece shall be of the same material as the pipe.

7. Only ductile iron pipes and fittings installed at invert elevation 5 feet or lower shall be encased in polyethylene loose wrap installed by the Contractor. Installation of polyethylene loose wrap shall be in accordance with AWWA C105. The wrap shall consist of an 8-mil thickness polyethylene tube or flat sheet installed to completely encase the pipe and fittings and secured thereto with 2-inch wide plastic adhesive tape.

8. When pipe laying is interrupted or delayed, all openings shall be tightly closed with cast iron removable plugs or caps. The plugs shall be held securely in place.

B. Mechanical Joint

1. In making the joint, the bell and the spigot ends of the pipe as well as the rubber gasket shall be thoroughly cleaned before assembly. The gland, followed by the gasket, shall be placed over the spigot end of the pipe. The spigot end of the pipe shall be inserted into the bell of the pipe previously laid. The small side of the gasket and the lip side of the gland shall face the bell. The gasket shall then be pushed into position so that it is evenly seated in the bell. The gland shall be moved against the face of the gasket.

2. Bolts shall be inserted with threaded ends on the gland side. Nuts shall be screwed on by hand and made hand tight in pairs, 180 degrees apart. Bolts shall be alternately tightened (180 degrees apart) to the required tension with an ordinary ratchet wrench, beginning at the bottom, then the top and so on. The ranges of bolt torques to be applied shall be as indicated in the table below.

BOLT TORQUE

Bolt Size (inches)

Range of Torque (Ft. Pounds)

5/8 45-60

HAVO – 305150B 33 14 16 - 16

3/4 75-90

1 85-100

1-1/4 105-120

3. The table below indicates the lengths of wrenches that should satisfactorily produce the ranges of torques in table above.

WRENCH LENGTH

Bolt Size (inches)

Length of Wrench (inches)

5/8 8

3/4 10

1 12

1-1/4 14

4. When the joint is assembled, the distance between the face of the bell and the face of the gland shall be uniform all around the pipe.

5. All stainless steel bolt and nut threads shall be pre-coated with anti-seizing graphite compound before installation.

C. Push-On Joint

1. The gasket and gasket seat in the socket of the pipe shall be wiped clean. The gasket shall be placed in the socket with the large round end entering first. The gasket shall be sprung into place. The groove of the gasket shall fit over the bead in the seat.

2. A thin film of non-toxic lubricant, supplied by the manufacturer, shall be applied to the inside of the gasket that comes in contact with the pipe. A thin film of non-toxic lubricant may also be applied to the outside of the plain end of the pipe.

3. The joint shall be assembled by entering the plain end of the pipe past the gasket until contact is made with the base of the socket.

4. When pipes are cut in the field, the outside edges of the cut end shall be tapered with a coarse file or portable grinder. The taper shall be about 1/8 inch at an angle of about 30 degrees with the centerline of the pipe.

D. Flanged Ends

1. All flanged pipes, fittings and valves shall be installed to the lines and grade shown on the plans. The face of flanges shall be true and free of projections and shall be cleaned of all rust and foreign matter. Gaskets shall be "full face" carefully cut to fit flanges and bolt holes. "Flange-Tyte" gaskets may also be used. Flanges shall be brought up to true alignment and fit with uniform tension on all bolts. All stainless steel bolt and nut threads shall be pre-coated with anti-seizing graphite compound before installation.

HAVO – 305150B 33 14 16 - 17

3.4 INSULATED HDPE PIPE

A. The carrier pipe joining method shall be the thermal butt fusion method and shall be performed in strict accordance with these Specifications, PPI guidelines, and the pipe manufacturer's recommendations. Should there be a conflict between these Specifications and the pipe manufacturer's recommendations; the more stringent requirement shall govern. The butt fusion equipment used in the joining procedures shall be capable of meeting all conditions and procedures recommended by the pipe manufacturer, including but not limited to, temperature requirements, alignment, and interfacial fusion pressure and automatic recording of parameters for joining.

1. Heat fusion joining shall be complete, efficient, and match the outer diameter of the two pipe being heat fused. Any offset or mismatch shall not exceed 10% of the minimum wall thickness. In all cases, heat fusion pipe joints shall have a joint weld strength equal to or greater than the tensile strength of the pipe.

2. Submit detailed fusion joint reports as recorded by the heat fusion machine for all joints.

Submit a report to the CMR the same day the fusion is made. Submit a formal report of all fusions to the CMR on a weekly basis, no later than 4:00 p.m. each Friday. If any joint as indicated by these reports is found to be unsatisfactory, the Contractor shall remove portions of the pipe containing such joint and install a new pipe piece as required and approved by the CMR.

3. The first fusion shall be a trial fusion to be performed in the field in the presence of the CMR. The trial fusion shall be allowed to cool completely, then fusion test strips shall be cut out. The test strip shall be the longer of 12 inches or 30 times the wall thickness in length with the fusion in the center, and 1-inch minimum or 1.5 times the wall thickness in width. Then, the test strip shall be bent until the ends of the strip touch. If the fusion fails at the joint, or if the joint exhibits cracking or crazing, a new trial fusion shall be made, cooled completely and tested. Butt fusion of the pipe to be installed shall not commence until the trial fusion has passed the bend back test.

4. Following the successful initial trial fusion, the bend back test shall be performed once every fiftieth joint.

B. HDPE outer jacket joints shall be field insulated per manufacturer recommendations using a preformed insulated half shell.

3.5 SERVICE LINES

1. Upon completion of excavation, the trench bottom shall be brought up to the required invert grade by backfilling and compacting the trench.

2. All pipes and appurtenances shall be thoroughly inspected and tested prior to installation.

The various types and sizes of service laterals and connections shall be installed at the

HAVO – 305150B 33 14 16 - 18

locations shown on the plans in accordance with the Standard Details. Where possible, no joints will be permitted in the paved areas.

B. Water service pipes shall be cut using a tool or tools specifically designed to leave a smooth, even, and square end on the piping material to be cut. Cut ends shall be reamed to the full inside diameter of the pipe. Pipe ends to be connected using couplings which seal to the outside surface of the pipe shall be cleaned to a sound, smooth finish before the couplings are installed.

C. Installation shall be in accordance with the manufacturer's recommendation and shall comply with the applicable laws and regulations of the State of Hawaii and respective County. Minimum curving radius for tubing shall be as shown in the table:

Minimum Curving Radius

Tube Size (inches)

3/4 1 1-1/4 1-1/2 2

Minimum Radius (Inches)

11 14 19 21 21

D. Conducting cable shall be installed over tubing for "toning" purposes as directed by the Manager.

Conducting cable shall be solid one piece copper wire, No. 8 gauge (American or Brown and Sharpe Gage) or larger.

E. The conductive cable shall not be tied to or in contact with any other metallic fitting. The ends shall be terminated inside a test box and/or meter box or property valve box.

F. Fittings to be used with PE tubing shall be of the brass compression type or flare type as manufactured by Ford Meter Box Company or approved equal. Stainless steel insert stiffeners for PE tubing shall be used at all compression joints.

G. All pipes, laterals and appurtenances shall be hydrostatically tested separately or in conjunction with the water main. Test pressure for laterals shall be the same as specified for the water main.

H. Upon completion of the test, the trench shall be backfilled as specified in 3.3 TRENCH

BACKFILL.

I. A locator stake shall be placed at the capped end of the water line for locating in the future.

3.6 GATE VALVES

A. General

1. The Contractor shall furnish and install all gate valves at locations shown on the plans.

2. Unless otherwise specified, valves installed at invert elevation 5 feet or lower shall be encased in polyethylene loose wrap installed by the Contractor. Installation of polyethylene loose wrap shall be in accordance with AWWA C105. The wrap shall consist

HAVO – 305150B 33 14 16 - 19

of an 8-mil thickness polyethylene tube or flat sheet installed to completely encase the valve and secured thereto with 2-inch wide plastic adhesive tape.

3. All valves shall be thoroughly inspected to insure proper working order before being installed. When valves show leakage at any point under pressure tests, the valve will be rejected and shall be replaced at no additional cost to the Owner.

4. All gate valves installed with plastic pipe shall be secured in position with reinforced concrete blocks and non-corrosive straps.

5. Only proper standardized tools shall be used in operating valves.

3.6 METER BOXES

A. Meter boxes shall be installed for all services at the locations shown on the plans.

B. Where meter boxes are installed in sidewalk areas or with concrete slabs, the top of the box and the cast iron cover shall be flush and square with the sidewalk or slab. Meter boxes shall be 3 feet minimum clear from driveway flares or aprons, ramps and any structures. Meter boxes shall also be 12 inch minimum clear from right-of-way or property lines.

C. All meter boxes shall be installed to give a neat and finished appearance.

D. Upon completion of the installation, each metal frame and cover shall be given a coat of high-grade asphaltum.

3.7 FIRE HYDRANTS

A. Hydrants shall be installed at locations shown on the plans.

B. All fire hydrants shall be installed with the 4½-inch nozzle faced no more than 15 degrees to the left or right of the line running from the center of the hydrant and perpendicular to the street curb.

An adaptor may be required.

C. Hydrants shall be installed with the barrel vertical. After the hydrant has been checked for alignment and grade, the barrel shall be wedged tightly against the side of the trench to prevent any lateral movement. The wedges may be removed after the concrete anchor block poured at the bottom elbow has set.

D. The concrete anchor block shall be placed to at least 12 inches above the invert of the bottom elbow and shall not be disturbed for a minimum of seven days. For dry barrel fire hydrant, anchor block shall be placed so that the drain holes are not plugged.

E. Only standard tools shall be used in operating fire hydrants.

F. Fire hydrants installed in areas where there are no standard curbing shall be protected by the installation of DWS 2500 concrete curb guards or guard posts with concrete pads.

G. Prior to final inspection, all exposed fire hydrants and parts to 4 inches below grade shall be cleared of all oil, grease, dirt or other foreign material, sanded and painted.

HAVO – 305150B 33 14 16 - 20

H. Prior to final inspection, an EPA or FDA approved non-toxic grease shall be applied to the fire hydrant nozzle threads.

3.8 VALVE BOXES

A. Valve boxes shall be installed 3 feet minimum clear from gutter, curbs, utilities and any structures.

B. The standpipe shall be set plumb and centered over the valve stem. Backfill around the valve and standpipe shall be made by hand to 8 inches below the surface of the ground and compacted.

Compaction of backfill shall be done with approved pneumatic tampers.

C. The cast iron frame and cover shall be set firmly to grade. A 4” thick concrete slab shall be poured to secure the frame.

D. All cast iron covers shall be close fitting to avoid rattling due to the passing traffic. All defective frames and covers shall be replaced to the satisfaction of the CO.

E. Upon completion of installation, valve box frames and covers shall be cleaned and painted with one coat of approved asphaltum paint.

F. For existing valve boxes to be reconstructed to the required elevation, the existing standpipe shall be replaced with one having the correct length to bring the valve box to the required elevation.

The existing standpipe may be reused if so approved by the CO.

3.9 PIPE CLEANING

A. Pipe shall be thoroughly cleaned and flushed during or after installation prior to the hydrotesting work.

B. Unless otherwise specified, cleaning shall be by the use of “pigs” introduced into the pipeline and run completely through all installed pipelines excluding branch lines for fire hydrants and service laterals. Bare foam "pigs" shall be used to swab piping clean as each length of the pipeline is installed. Cleaning and "pigging" of the pipeline shall be considered incidental to the installation of the new pipeline.

3.10 BACKFLOW PREVENTION ASSEMBLIES

A. The backflow prevention assembly shall be installed above ground and as close to the meter's emergency by-pass connection and before any branches, as physically possible. Connections or tees between the meter and the backflow prevention assembly will not be permitted. Installation heights of backflow prevention assemblies shall conform to Table below:

HAVO – 305150B 33 14 16 - 21

BACKFLOW PREVENTION ASSEMBLY HEIGHT

Size of RP and DC Assemblies (Inches)

Dimension (Inches) Ground Level to Centerline of Backflow Prevention

Assembly

Minimum Maximum

¾ to 1½ 18 48

2 to 3 24 48

3 to 4 30 48

B. The backflow prevention assembly shall be installed in a horizontal, upright position, properly protected from external damage, in an easily accessible location, and in an area free of any obstruction within two feet surrounding the device. Drainage shall be provided.

C. Testing

a. Backflow Prevention Assemblies shall be tested by a certified Backflow Prevention Assembly General Tester acceptable to the Department of Water Supply.

3.11 FIELD QUALITY CONTROL

A. Field Tests and Inspections

1. All water mains and appurtenances including service laterals and service connections shall be subjected to a hydrostatic pressure test by the Contractor in the presence of the CO.

2. Prior to hydrostatic testing, obtain Contracting Officer approval of the proposed method for disposal of waste water from hydrostatic testing. The Contracting Officer will conduct field inspections and witness field tests specified in this section. The Contractor shall perform field tests, and provide labor, equipment, and incidentals required for testing. The Contractor shall produce evidence, when required, that any item of work has been constructed in accordance with the drawings and specifications

3. All equipment and material necessary for tests shall be furnished and installed by the Contractor.

4. Test water system in accordance with applicable requirements of AWWA C600 for hydrostatic testing. No leakage will be allowed at pipe joints. For pressure test, hydrostatic pressure shall not be less than 200 psi. Hold this pressure for not less than 2 hours. Prior to the pressure test, fill that portion of the pipeline being tested with water for a soaking period of not less than 24 hours. For leakage test, use a hydrostatic pressure not less than the maximum working pressure of the system. Leakage test may be performed at the same time and at the same test pressure as the pressure test.

5. If test fails, repair leaks and repeat the test as described above.

HAVO – 305150B 33 14 16 - 22

6. After all leaks have been stopped and the test completed, tapered threads plugs shall be furnished and installed by the Contractor in holes made for testing purposes.

3.12 DISINFECTION

A. Water mains shall be disinfected in accordance with AWWA standard for disinfecting water mains, ANSI/AWWA C651-14, Section 4.4, Continuous Feed Method.

B. Prior to chlorination, the water mains shall be thoroughly flushed and cleaned, respectively, in accordance with the applicable AWWA standards stated above.

C. Liquid chlorine or calcium hypochlorite that has been tested and certified as meeting the specifications of ANSI/NSF Standard 60, drinking water treatment chemicals-health effects, shall be used for the chlorination of the water mains.

D. The interior surfaces of the water mains shall be exposed to the chlorinating solution, by completely filling the main to remove all air pockets, for a minimum of 24 hours and the free chlorine residual shall not be less than 10 ppm after such time.

E. Should calcium hypochlorite be used, no solid and/or undissolved portion of the compound shall be introduced into any section of the water mains to be chlorinated.

F. At the end of the 24 hour disinfection period, representative samples shall be taken and analyzed to assure a free chlorine residual of at least 10 ppm.

G. Should the free chlorine residual results indicate adequate chlorination, the water mains and storage tank shall be thoroughly flushed and filled with water from the existing system and again tested for free chlorine residual. The flushing shall be considered adequate if the free chlorine residual test results indicate that the water in the water mains has a comparable chlorine residual as the water in the existing system.

H. The contractor shall be responsible for the proper disposal of chlorinated water to safeguard public health and the environment in accordance with applicable state department of health requirements. A neutralizing chemical shall be applied to the water to be wasted to thoroughly neutralize the chlorine residual remaining in the water in accordance with ANSI/AWWA C651- 14, Section 4.9.2.

I. The contractor shall be responsible for obtaining a National Pollutant Discharge Elimination System (NPDES) permit from the Department of Health, Clean Water Branch, prior to the start of construction for the disposal of water used for hydrotesting and chlorination.

J. Following the acceptable flushing of the water mains, two consecutive sets of acceptable samples, taken at least 24 hours apart from representative points, shall be subjected to microbiological tests (total and fecal coliform).