100_Specs_Div_2_to_5_and_App.pdf

02010-1

SECTION 02010

MOBILIZATION

PART 1 - GENERAL

1.01 SCOPE OF WORK

A. Work included in this Section includes all work necessary to transport all materials, equipment, personnel and prepare sites for piping improvements including but not limited to, clearing and grubbing, and providing access, power, water, and temporary facilities, as needed.

PART 2 - PRODUCTS

2.01 GENERAL

A. The Contractor is solely responsible for providing security for all materials stored on-site during the construction activities.

PART 3 - EXECUTION

3.01 GENERAL

A. The Contractor shall provide 10 days notification to the Engineer prior to initiating mobilization to the site and initiating work. The Contractor will also provide proof that all permits have been obtained prior to initiating work.

B. The Contractor shall restrict his operations to the designated work area and ensure that construction activities do not disrupt normal operational activities of the County’s utility services.

C. The Contractor is responsible for visually inspecting the site to note obstructions or access difficulties.

D. The Contractor is responsible for providing and/or maintaining access to the work site to facilitate all construction, inspection and testing activities.

END OF SECTION

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02080-1 Rev. 01/2019 UTILITY MATERIALS Pub. 11/2020

SECTION 02080

UTILITY MATERIALS

PART 1 – GENERAL

1.01 DESCRIPTION

A. The Work included in this section consists of furnishing all labor, equipment and materials for the construction and installation of all utility piping, valves, and appurtenances within the limits of the Work shown, complete and ready for operation as shown on the drawings.

B. The Contractor shall coordinate making connection of the new mains to mains which are in service at the time of construction with the Utility. The Contractor shall not connect to existing facilities unless the Engineer and a representative of the Utility are present. The Engineer and the Utility shall be notified at least 48 hours prior to the time connection is desired.

C. Operation of all system valves shall be done by the Utility's personnel only. At no time shall the Contractor operate any system valves. System valves shall be defined as any valve which has main pressure against either side of the valve. The Contractor shall notify the Utility to request that a valve be operated, at least 48 hours prior to the time operation is required.

1.02 CONSTRUCTION REQUIREMENTS

A. All underground pipes shall be installed with at least 36 inches of cover, unless otherwise shown or indicated on the Drawings.

B. For underground water and force main, changes in horizontal alignment of less than 11 1/4 degrees may be achieved through the use of allowable pipe deflection subject to approval of the Engineer. Said deflection shall not exceed 80 percent of the maximum allowable deflection as stated in the pipe manufacturer's installation instructions. Deflection shall not occur in fittings.

C. The minimum diameter for pressurized utility mains is 4-inch diameter.

D. Valves shall be designed to facilitate the isolation of each section of the pipeline between intersections of the grid. The minimum number of valves at an intersection shall be one less than the number of pipes forming the intersection. No more than four valves should need to be operated to isolate any pipe segment.

E. Valves shall be installed at intervals not greater than those listed below:

1. Force main – 1000 linear feet

2. Potable Water Main

i. Distribution main – 700 linear feet

ii. Transmission main – 800 linear feet

3. Reclaimed Water Main

i. Distribution main – 700 linear feet

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ii. Transmission main – 800 linear feet F. Water shall not be allowed in trenches while underground pipes or structures are being laid or tested. The Contractor shall not open more trench than the available pumping facilities are able to dewater to the satisfaction of the Engineer. The Contractor shall assume responsibility for disposing of all water so as not to injure or interfere with the normal drainage of the area in which he is working. In no case shall pipelines being installed be used as drains. Pipe ends shall be kept properly and adequately plugged during construction by the use of stoppers approved by the Utility and not by improvised equipment. All necessary precautions shall be taken to prevent the entrance of mud, sand, or other obstructing matter into pipelines. If upon completion of the work any such materials have entered the pipelines, they must be cleaned as directed by the Engineer so that the entire system will be left clean and unobstructed.

1.03 HANDLING AND INSPECTION

A. Materials shall be handled and stored in a manner to prevent them from damage.

Particular care shall be taken not to damage pipe coatings. Insides of pipes, valves, and backflow preventers shall be kept free of dirt and debris.

B. The Contractor shall obtain from pipe manufacturers a certificate of inspection that the pipe and fittings supplied for this Contract have been inspected at the plant and that they meet the requirements of these specifications.

C. All materials shall be subject to visual inspection at time of delivery and also just before they are incorporated into the work. Items that do not conform to specifications will be rejected and must be removed immediately by the Contractor.

D. All materials shall be clearly marked or otherwise identified with the date of manufacture. Materials greater than the age listed below will not be accepted:

1. Valves and fittings: 2 years

2. PVC Pipe: 4 years

3. Fire Hydrants: 1 year

E. The entire product of any plant may be rejected when, in the opinion of the Utility, the methods of manufacture fail to secure uniform results, or where the materials used are such as to produce inferior pipe or fittings.

1.03 SUBMITTALS

A. Shop Drawings:

1. Shop drawings for all components of the project shall be submitted to the

Engineer for approval prior to construction.

2. A separate shop drawing submittal will be required for each major item and for each different type of an item within a major item. For example, with regard to valves, separate submittals will be required for gate, plug, butterfly, ball, check, and automatic air release valves.

B. Material Affidavits:

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1. The Contractor shall furnish an Affidavit of Compliance certified by the pipe manufacturer that the pipe, fittings and specials furnished under this Contract comply with all applicable provisions of current AWWA and ASTM Standards and these Specifications. No pipe or fittings will be accepted for use in the work on this project until the Affidavit has been submitted and approved by the Engineer.

2. The Utility reserves the right to sample and test any pipe or fitting after delivery and to reject all pipe and fittings represented by any sample which fails to comply with the specified requirements.

3. Fire hydrants shall be clearly marked with a year of manufacture cast onto the barrel of the hydrant. Fire hydrants greater than one year old will not be accepted.

PART 2 - PRODUCTS

2.01 GENERALLY

A. The intent of the Utility is to allow either PVC or HDPE pipe for potable water, reclaimed water and sewer lines 4 inches in diameter to 12 inches in diameter unless a particular pipe material is expressly called for on the Drawings. Pipes larger than 12-inch diameter shall be ductile iron pipe.

2.02 DUCTILE IRON PIPE AND FITTINGS

A. Ductile iron pipe shall conform to the requirements of ANSI, A 21.51 and AWWA C 151, latest revision. The pipe shall have a minimum pressure class of Class 350 for diameters 4 to 12 inches in size and a minimum pressure class of Class 250 for diameters larger than 12 inches in size. Flanged pipe shall have a minimum thickness class of Class 53.

B. Pipe shall be furnished in nominal laying lengths of 20 feet or less, unless specifically shown otherwise on the Drawings.

C. The applicator firm and personnel shall be certified, experienced, and qualified to perform the application of the lining and coating materials specified herein. All ductile iron pipe and ductile iron fittings shall have the linings and coatings applied and warranted by the same applicator firm. The applicator firm shall submit certification attesting that it met the requirements of this specification and the requirements of the lining and/or coating materials manufacturer's application specifications. The pipe lining material shall be applied to new, unused, never lined ductile iron pipe and fittings. The pipe and fitting linings and coatings shall be tested for freedom from holidays and pinholes. The pipe shall be lined and coated as specified below:

1. Ductile iron pipe and fittings used for potable water shall be cement lined in accordance with ANSI/AWWA C 104, current revision, "Cement-Mortar Lining for Ductile Iron and Gray Iron Pipe and Fittings for Water". The cement lining shall have standard thickness and, after curing, the lining shall have a seal coat

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Pub. 11/2020 of bituminous material in accordance with AWWA C 104, current revision and shall be listed by ANSI/NSF Standard 61 for potable water contact.

2. Ductile iron pipe and fittings used for force main shall be coated with a ceramic epoxy lining and reclaimed water shall be coated with a fusion bonded epoxy lining or a cement lining. The interiors of the ductile iron pipe and fittings shall receive 40 mils dry film thickness of the protective lining. Storage, surface preparation, application and safety precautions shall strictly follow manufacturers’ instructions. The applicator of the interior lining shall be approved by the lining manufacturer and written certification of such approval shall be submitted to the Engineer before any lining work is initiated.

Applicator firms not having lining manufacturer’s written approval will not be considered.

3. Ductile iron pipe, fittings and specials to be installed underground shall be coated on exterior at the factory with an asphaltic coating as specified in AWWA C 151. All clamps, bolts, nuts, studs and other uncoated parts of joints for underground installation shall be coated with epoxy prior to backfilling.

Epoxy shall be equal to Carboline Bitumastic No. 300-M.

4. Ductile iron pipe and fittings to be installed aboveground shall be furnished with a shop applied primer on the exterior.

5. Polyethylene Pipe Encasement for Buried Pipe:

i. Polyethylene tube encasement shall be provided and installed for all buried ductile iron pipe. Both material and installation procedures shall be in accordance with AWWA C 105.

ii. The polyethylene encasement shall be a minimum of 8 mil thick and shall be certified by the manufacturer to provide suitable protection of pipe installation in corrosive soil.

iii. All pipe joints shall consist of a minimum of one foot of polyethylene overlap onto the adjacent pipe at both ends. All overlap material shall be secured in place with at least two wraps of ½-inch x 8 mils polyethylene adhesive tape. Any slack liner material along the pipe barrel shall be taken up by folds secured in-place with adhesive tape.

Repair any rips, punctures or other damage to polyethylene with tape or by patching.

iv. All valves, fittings and specialty items shall be jointed with proper overlaps and fastening as described above. Prepare openings for service taps, air-reliefs, etc., by making a cut in the polyethylene and temporarily folding back the edges. After installation is completed, replace the polyethylene and repair the cut with polyethylene adhesive tape.

v. Care shall be taken during backfilling so that no damage will occur to the polyethylene liner. In general, backfilling shall be done in accordance with AWWA Standard C 600.

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vi. The Contractor shall install polyethylene encasement in accordance with all liner and pipe manufacturer recommendations.

D. Fittings for ductile iron pipe shall be either mechanical joint, restrained joint or flanged joint as indicated on the Drawings and shall have a minimum working pressure of 250 psi. Fittings shall be ductile iron and shall conform to ANSI/AWWA C 110, ANSI/AWWA C 111 and ANSI/AWWA C 153, latest revisions for flanged and mechanical joint pipe. Fittings shall be coated and lined as specified above for ductile iron pipe. The rubber gaskets for flanged, mechanical, and push-on joints shall be as described below.

E. Pipe using push-on joints shall be in strict accordance with AWWA C 111 and ANSI A 21.11, latest revision. Jointing materials shall be provided by the pipe manufacturer and installation shall be in strict accordance with the manufacturer's recommended practice.

F. Jointing materials for mechanical joints shall be provided by the pipe and fitting manufacturer. Materials assembly and bolting shall be in strict accordance with ANSI/AWWA C 111 and ANSI/AWWA C 153, latest revisions. Tee head bolts and nuts for mechanical joints shall be manufactured of CORTEN, high strength, low alloy, corrosion resistant steel.

G. Flange joints shall be Class 125 per ANSI B 16.1 with any special drilling and tapping as required to ensure correct alignment and bolting.

1. Gaskets shall be full-face, 1/8-inch thick, cloth-inserted rubber and shall be suitable for a water pressure of 350 psi at a temperature of 180°F.

2. Bolts and Nuts for Flanges:

i. Bolts and nuts for flange located outside above ground or indoors and in enclosed vaults and structures shall be carbon steel, ASTM A 307, Grade B.

ii. Bolts and nuts for buried and submerged flanges and flanges located in wet wells, and manholes shall be Type 316 stainless steel conforming to ASTM A 193, Grade B8M for bolts, and ASTM A 194, Grade 8M for nuts.

iii. Flanges shall be long-hub type screwed tightly on pipe by machine at the foundry prior to facing and drilling. Flange machine surfaces shall be coated with rust inhibitor immediately after facing and drilling. Field assembled screwed on flanges are prohibited.

H. Restrained joints shall be provided for all piping systems in accordance with the restraint tables contained elsewhere within these criteria.

1. Joints shall be manufacturer's standard specifically modified push-on type joints with joint restraint provided by ductile iron retainer rings joined together by corrosion resistant, high strength steel tee head bolts and nuts or with joint restraint provided by a welded-on retainer ring and a split flexible ring assembled behind the retainer ring.

2. Restrained joint pipe and fittings shall be ductile iron and shall comply with applicable portions of this specification. Manufactured restrained joints shall

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Pub. 11/2020 be capable of deflection during assembly. Deflection shall not exceed 80 percent of the manufacturer's recommendations. Deflection at fittings is not permitted.

3. Tee head bolts and nuts for restrained joints shall be manufactured of CORTEN, high strength, low alloy, corrosion resistant steel.

4. Surcharged gravity pipes shall be restrained as pressure pipes.

I. Ductile iron pipe fittings with mechanical joints may also be restrained, at the

Contractor's option, using a follower gland which includes a restraining mechanism.

When actuated during installation, the restraining device shall impart multiple wedging actions against the pipe wall which increases resistance as internal pressure in the pipeline increases.

1. The joint shall maintain flexibility after installation. Glands shall be manufactured of ductile iron conforming to ASTM A 536 and restraining devices shall be of heat-treated ductile iron with a minimum hardness of 370 Brinell Hardness Number. The gland shall have standard dimension and bolting patterns for mechanical joints conforming to ANSI/AWWA C 111 and C 153, latest revisions.

2. Tee head bolts and nuts shall be manufactured of corrosion resistant, high strength, low alloy CORTEN steel in accordance with ASTM A 242.

3. The restraining wedges shall have twist-off nuts to insure proper torqueing.

The mechanical joint restraint device shall have a minimum working pressure rating of 250 psi with a minimum safety factor of 2 to 1. After installation prior to backfilling, all parts of the joint restraint system shall be coated with coal tar epoxy equal to Carboline Bitumastic No. 300-M.

J. All buried piping shall receive a color-coded adhesive tape or other identification tape as specified elsewhere in these Criteria.

2.03 POLYVINYL CHLORIDE PIPE AND FITTINGS (PVC)

A. PVC Gravity Sewer: PVC pipe and fittings 4 inches nominal diameter and larger for wastewater gravity sewer lines and services shall conform to the requirements of ASTM D 3034, latest revision, with a standard dimension ratio (SDR) 26 or 35. Pipe shall be furnished in standard laying lengths of 14 ft.

1. Pipe joints shall be an integral wall bell and spigot with a solid cross section, elastomeric ring gasket which shall conform to the manufacturer's standard dimensions and tolerances and meet the requirements of ASTM D 3212, latest revision. The elastomeric ring gasket shall be factory assembled in the pipe bell and securely locked in place to prevent displacement during jointing in the field.

2. All fittings and accessories shall be manufactured of PVC in accordance with the same specifications as PVC pipe of the same size. Fittings shall have bell ends with elastomeric gaskets which conform to the same dimensions, tolerances and specifications as the PVC pipe. PVC fittings shall be molded where available.

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B. Unless otherwise noted, PVC pressure pipe for nominal diameters 4 to 12 inches in size shall conform to the requirements of AWWA C 900, pressure class 150, dimension ratio of DR18, and gasketed integral bell ends. Fittings shall be ductile iron with restrained mechanical joint ends. Pipe shall be made to ductile iron pipe outer diameters.

1. Pipe joints shall be made with integral bell and spigot pipe ends. The bell shall consist of an integral thickened wall section designed to be at least as strong as the pipe wall. The bell shall be supplied with factory glued rubber ring gasket which conforms to the manufacturer's standard dimensions and tolerances. The gasket shall meet the requirements of ASTM F 477 "Elastomeric Seals (Gaskets) for Joining Plastic Pipe".

2. Restrained joints shall be provided for all piping systems in accordance with DIPRA Standards, to restrain system thrust. Restraint calculations shall be based on pipe laying condition type 4 and soil type SM. Pipe joints and fittings shall be restrained in accordance with the restraint tables contained elsewhere within these criteria.

3. Surcharged gravity lines shall be restrained as pressure lines.

C. All buried piping shall receive a color-coded adhesive tape or other identification tape as specified elsewhere in these Criteria.

2.04 HIGH DENSITY POLYETHYLENE PIPE AND FITTINGS (HDPE)

A. Polyethylene pipe shall be manufactured in accordance with and conforming with AWWA C 906 latest edition and ASTM F714. Pipe diameters are as shown on the drawings.

B. Polyethylene pipe shall be rated for use with water at 73.4 degrees F at a hydrostatic design basis of 1,600 psi.

C. Dimension Ratio (DR) of DR 9 shall be the minimum allowed for HDPE less than four inches in diameter

D. Dimension Ratio (DR) of DR 11 shall be the minimum allowed for HDPE four inches and greater in diameter

E. Polyethylene extrusion compound from which the polyethylene pipe is extruded must comply with application requirements for PE-4710 high molecular weight polyethylene plastic material, as described in ASTM D 3350.

F. The pipe color shall be solid color or co-extruded with color strips for wastewater, potable water or reclaimed water and marked to include nominal pipe or tubing size;

type of plastic material, i.e., PE-4710; standard thermoplastic pipe dimension ratio or pressure rating in psi for water at 73.4oF @100 psi; ASTM designation with which pipe complies; and manufacturer’s name or trademark and code.

G. All molded fittings and fabricated fittings shall be fully pressure rated to match the pipe STANDARD DIMENSION RATIO pressure rating to which they are made. All fittings shall be molded or fabricated by the manufacturer. No Contractor fabricated fittings shall be used unless approved by the Utility.

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H. The manufacturer of the HDPE pipe shall supply all HDPE fittings and accessories as well as any adapters and/or specials required to perform the work as shown on the Drawings and specified herein.

I. All fittings shall be installed using butt-fused fittings, thermo-fused fittings/couplings, or flanged adapters and must be approved by the Utility. Size on size wet taps are prohibited for HDPE pipe

J. All transition from HDPE pipe to ductile iron or PVC shall be made per the approval of Engineer and per the HDPE pipe manufacturer’s recommendations and specifications.

A molded flange connector adapter within a carbon steel back-up ring assembly shall be used for pipe type transitions. Ductile iron back-up rings shall mate with cast iron flanges per ANSI B16.1. A 316 stainless steel back-up ring shall mate with a 316 stainless steel flange per ANSI B16.1.

K. Stainless steel stiffener inserts shall be installed in the bore of HDPE pipe when connection plain end HDPE pipe with mechanical fittings of valves. Stiffeners may be one or two pieces and shall be constructed of 316 stainless steel.

2.05 PIPE COUPLINGS

A. Pipe couplings used to join two pieces of plain end pipe shall be sized to suit the outside diameter of the pipe ends to be jointed. Transition couplings shall be used to join pipes of different outside diameters. Pipe couplings shall be bolted-type with steel middle ring and end followers.

B. All carbon steel parts of the coupling shall be coated on the interior and exterior with a fusion bonded or thermosetting epoxy coating with a 12-mil nominal coating thickness.

C. Gaskets for the coupling shall be wedge -type of Buna-N resilient rubber.

D. Bolts shall be manufactured of high strength Type 304 stainless steel with Type 316 stainless steel hexagonal nuts. Bolts and nuts shall conform dimensionally to ANSI/AWWA C 111, latest revision.

2.06 FLANGED COUPLING ADAPTERS

A. Adapters shall be suitable for joining plain end pipe to flanged pipes and fittings.

Adapters shall conform in size and bolt hole placement to ANSI standards for steel and/or cast-iron flanges 125- or 150-pound standard unless otherwise required for connections.

B. Adapters shall be constructed of steel or cast iron, coated in accordance with Section 09900. Bolts and nuts shall be Type 304 stainless steel conforming to ASTM A 193, Grade B8 for bolts, and ASTM A 194, Grade 8 for nuts and washers. Bolts and nuts greater than 1 1/8-inches shall be carbon steel, ASTM A 307, Grade B, with cadmium plating, ASTM A 165, Type NS.

C. Adapters shall be equipped with tie rods and all required accessories needed to restrain plain end pipe joint against piping system thrust.

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2.07 GATE VALVES

A. Gate valves shall have a cast or ductile iron body with the manufacturer's distinctive marking, pressure rating and year of manufacture cast on the body. Gate valves shall open by turning to the left (counter-clock-wise), when viewed from the stem. When fully open, gate valves shall have a clear waterway equal to the nominal diameter of the pipe. Operating nut or hand wheel shall have an arrow cast in the metal indicating the direction of opening. Prior to shipment from the factory, each valve shall be tested by applying to it a hydrostatic pressure equal to twice the specified working pressure. Hydrostatic and leakage tests shall be conducted in accordance with ANSI/AWWA C 509 or ANSI/AWWA C 515, latest revisions, whichever is applicable.

B. Gate valves with nominal sizes from 3 to 36 inches shall conform to ANSI/AWWA C 515, latest revision, and shall be designed for a minimum working pressure of 250 psi.

Valves shall be iron body resilient seat type with O-ring stem seals. The valve stem, stem nut, glands and bushings shall be bronze. Valve disc shall be constructed to assure uniform seating pressure between disc seat ring and body seating surface.

Resilient seat of valve shall be formed by EPDM rubber which is permanently bonded to and completely encapsulates a cast or ductile iron valve disc. Valve ends for underground installation shall be mechanical joint as specified for ductile iron pipe and flanged for above ground valves. Interior of valve body shall be coated with a fusion bonded or thermosetting epoxy coating in accordance with AWWA C 550, latest revision. Coating shall be holiday-free, NSF approved, with a minimum thickness of 12 mils. Surfaces shall be clean, dry and free from rust and grease before coating.

Exterior surfaces shall be coated as specified hereinafter.

C. All gate valves shall have either mechanical joint, restrained joint or flanged ends to fit the pipe run in which they are to be used. Gate valves installed on push-on joint pipe shall have mechanical joint ends unless otherwise specified.

D. Unless otherwise shown on the Drawings or specified herein, gate valves shall have non-rising stems. Buried gate valves shall be furnished with a 2-inch square AWWA standard nut operator with a valve box and cover. Gate valves located aboveground or inside structures shall be furnished with a handwheel operator which shall have an arrow cast in the metal indicating the direction of opening.

E. All exterior surfaces of iron body gate valves shall be clean, dry and free from rust and grease before coating. For buried service, the exterior ferrous parts of all valves shall be coated at the factory with epoxy with a minimum total finish dry film thickness of 20 mils. Prior to back filling, all uncoated nuts, bolts, glands, rods and other parts of joints shall be coated in the field with Carboline Bitumastic No. 300- M or approved equal. For valves installed aboveground, the exterior ferrous parts of all valves shall be shop primed at the factory with one coat, minimum dry film thickness 2 - 3.5 mils, of a lead and chromate- free primer with rust-inhibitive pigments and synthetic resins.

Primer shall be suitable for finish paint specified.

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2.08 PLUG VALVES

A. Plug valves shall be non-lubricated eccentric plug type with semi-steel bodies, resilient faced plugs and welded nickel port areas shall be one hundred percent (100%) of full pipe area. Valves shall be capable of drip-tight shutoff at pressure in either direction.

All exposed nuts, bolts, springs and washers shall be zinc plated, except exposed hardware for submerged valves which shall be 304 stainless steel. Valve bodies shall be furnished with 125-pound ANSI Standard flanged ends, or mechanical joints, as shown on the drawings.

2.09 WET TAPPING SLEVES AND VALVES

A. Wet tapping sleeves shall be stainless steel, mechanical joint type, with working pressure rating of 200 psi for sizes 4 through 12 inches and 150 psi for sizes 14 inches and larger, and shall conform to the applicable Sections of AWWA Standard C 110 of current revision. Tapping sleeve shall have a full-face rubber gasket or O- ring and shall be tested in accordance with ASTM A-285. Sleeve and glands shall be split type for assembly on pipe, and sleeve and mechanical joint glands and gaskets shall be sized for use with the class and type of pipe being tapped. A pressure testing port shall be provided. Sleeve and glands shall be factory coated on interior and exterior with a fusion bonded, thermosetting epoxy coating in accordance with AWWA C 550, current revision. Coating shall be holiday free with a minimum thickness of 12 mils dry film thickness, and shall be furnished complete with all accessories. Outlet flange shall be Class 125 Standard. Contractor shall obtain approval from the Engineer for the drilling machine prior to tapping operations. Prior to backfilling, all uncoated exterior nuts, bolts, glands, rods and other parts of sleeve shall be coated in the field with coal tar epoxy to Carboline Bitumastic No. 300-M.

B. Wet tapping valves shall conform to ANSI/AWWA C 509 or ANSI/AWWA C 515, current revision, and shall be designed for a minimum working pressure of 250 psi.

Tapping valves 3 to 16 inches in size shall be resilient seat type gate valves as specified for gate valves 3 to 16 inches in size. Resilient seat type tapping valves shall be furnished with a raised guide ring cast integrally on the flanged end which is designed to match the groove in the tapping sleeve in accordance with MSS-SP60. The purpose of this guide ring shall be to ensure true alignment of the valve with the tapping sleeve. The interior of the waterway in the valve body shall be a full opening and capable of passing a full-sized shell cutter equal to the nominal diameter of the valve.

2.10 SWING CHECK VALVES

A. Swing check valves 4 inch through 12 inch in size shall conform to AWWA C 508, latest revision, and shall be designed for a minimum water working pressure of 150 psi.

Check valves shall have cast iron body with flanged ends and Class 125 drilling pattern in accordance with ANSI B 16.1. When open, the valve shall have a straight way passage with a minimum flow area equal to the full pipe area. Swing check valves shall be completely bronze fitted with renewable bronze seat ring and a rubber faced disc;

valve hinge pin shall be stainless steel. Check valves shall be supplied with an outside

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Pub. 11/2020 lever and weight. The check valve bonnet shall be provided with a tapped boss with plug for installation of the pressure gauges.

B. Swing check valves shall absolutely prevent the return of water back through the valve when the inlet pressure decreases below the downstream pressure. The check valve shall be constructed such that the disc and body seat ring may be easily removed and replaced without removing the valve from the line. Each valve shall be hydrostatically tested at the factory, at a test pressure of 300 psi.

C. Prior to shipment from the factory, the interior ferrous surfaces of the valve, except for finished, non-ferrous or bearing surfaces, shall be coated with a fusion bonded or thermosetting epoxy coating in accordance with AWWA C 550, latest revision. Coating shall be holiday-free, NSF approved, with a minimum thickness of 12 mils. Surfaces shall be clean, dry and free from rust and grease before coating.

D. All exterior surface of swing check valves shall be clean, dry and free from rust and grease before coating. For valves installed in below ground valve vaults, the exterior ferrous parts of all valves shall be coated at the factory with epoxy with a minimum total finish dry film thickness of 20 mils. Following installation, all uncoated nuts, bolts, glands, rods and other parts of joints shall be coated in the field with coal tar epoxy equal to Carboline Bitumastic No. 300-M. For valves installed aboveground, the exterior ferrous parts of all valves shall be shop primed at the factory with one coat, minimum dry film thickness 2 - 3.5 mils, of a lead and chromate-free primer with rust-inhibitive pigments and synthetic resins. Primer shall be suitable for finish paint specified.

2.11 SEWAGE AIR RELEASE VALVES

A. Air release valves shall be a heavy-duty combination air release and air vacuum type for 150 psi working pressure, tested to 300 psi. The body of these valves shall be conical shaped to maintain maximum air gap with the spring-loaded float and seal plug connection combining to ensure no contact between the sewage and the seal.

The valve shall have a double float design with the upper float being enclosed in the upper section of the valve and shall be made of polypropylene. The lower float shall be in the main body of the valve and shall be foam filled polypropylene. The body shall be constructed of reinforced nylon, and shall have a funnel shaped lower body to automatically drain sewage back in to the system. All internal metal parts are to be made from corrosion resistant stainless steel, with all operating parts in the upper section to be non-metallic reinforced nylon materials. The rolling resilient seal shall provide smooth positive opening, closing, and leak free sealing over the fluctuation of pressure differentials.

2.12 PRESSURE GAUGE ASSEMBLIES

A. Pressure gauges shall have the following design features: glycerin filled, 4 ½-inch dial, Type 316 stainless steel bourdon tube and movement, stainless steel case and ring, safety glass lens, and threaded lens retaining ring. Gauge shall be dual range (psi and

ft. of water) and will be selected such that the normal operating pressure is indicated

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Pub. 11/2020 approximately at mid span. Diaphragm seals shall be furnished for gauges used for wastewater service. Connections for both the gauge and the bottom connection shall be ½-inch female National Pipe Thread Taper threaded connections. The bottom member shall have a 1/2-inch plugged flushing connection with a Type 316 stainless steel plug. Liquid filling for the diaphragm seals shall be silicone. Diaphragm protection seals shall be supplied by the manufacturer of the gauge.

B. Each pressure gauge assembly shall be furnished with an isolation ball valve. Body, stem and all other parts of valves shall be manufactured of Type 316 stainless steel.

Valve packing shall be high-density TFE. Valve connections shall be ½-inch female National Pipe Thread Taper threaded connections.

2.13 SERVICE SADDLES, CORPORATION STOPS AND SAMPLING STATIONS

A. Service saddles shall have 85-5-5- brass alloy bodies in accordance with ASTM B62, ASTM B584 and AWWA C800, latest revisions, with double stainless-steel straps.

Straps shall be Type 304 stainless steel with premium grade Type 304 L stainless steel bolts and Type 304 stainless steel washers and nuts. The nuts shall be Teflon coated.

The gasket material shall be an elastomeric compound resistant to degradation by oil, natural gas, acids, alkalis, most aliphatic fluids and chloramines. The outlet of the saddle shall have National Pipe Thread Taper threads.

B. Corporation stops shall be all bronze construction in accordance with AWWA C 800, latest revision. Inlet threads shall be National Pipe Thread Taper iron pipe threads and the outlet connection shall be of the packed joint type suitable for use with CTS Poly Pipe.

1. Temporary sampling stations shall be a combination of corporation stops, service saddles, polyethylene tubing, and curb stops. Temporary sampling stations shall be properly abandoned after successful testing.

2.14 VALVE BOXES AND EXTENSIONS

A. A valve box shall be placed over the operating nut for each buried valve. The valve box shall be designed so as to prevent the transmission of surface loads directly to the valve or piping

B. Valve boxes shall be of the adjustable slide-type of suitable length with an interior diameter of not less than 5 inches. The valve boxes shall be manufactured of cast iron and shall be of the two-piece heavy-duty design including a bottom section and top section with cover. The cast iron cover shall be cast with the applicable service markings --"WATER", "SEWER", etc. The top section shall be adjustable for elevation and shall be set to allow equal movement above and below finished grade.

C. The castings shall be manufactured of clean, even grain, gray cast iron conforming to ASTM A48, Class 30B for Gray Iron Castings; and shall be smooth, true to pattern, free from blow holes, sand holes, projections and other harmful defects. The seating surfaces of both the cover and the top section shall be machined so that the cover will not rock after it has been seated.

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D. The valve boxes shall be coated inside and outside with an asphaltic coating prior to machining, so that the machined seating surfaces will be free of any coating.

E. If the depth of the valve nut is greater than 36" below grade, or 30" below grade and under the water table, a valve extension stem will be required. The extension stem shall be a continuous length of solid stainless steel 1-1/4-inch diameter round bar fitted with a 2-inch square operating nut on the top, have a centering collar, and will be mechanically attached to the valve operating nut.

2.15 ELECTRONIC MARKERS AND LOCATORS

A. Marker disks shall consist of a passive device capable of reflecting a specifically designated repulse frequency tuned to the utility being installed.

B. Marker disks shall be fifteen inches (15”) in diameter and one inch (1”) thick with a solid polyethylene shell.

C. Marker balls shall be 4” in diameter with a solid polyethylene shell.

D. Marker balls and disks shall be coded in accordance with the American Public Works

Association’s Utility Location and Coordinating Council Standards.

2.16 LOCATION MARKING

A. A suitable number of electronic markers shall be furnished so that a marker can be installed at one hundred-foot (100') intervals along the pipeline length.

B. Markers shall be placed at tees, valves or other points of connection and as directed by the Utility.

C. Markers shall be placed at points of horizontal pipe deflection so as to provide accurate indication of pipeline location and as directed by the Utility.

D. Marker disks shall be laid in a flat, horizontal position directly above the gravity sewer service and hand backfilled one-foot (1') above the disk to prevent damage or movement during subsequent backfilling. Depth of burial shall not be less than two feet (2') nor more than four feet (4').

2.17 MANHOLE GRADE RINGS

A. Precast concrete or HDPE rings shall be used to adjust frames to finished grade.

Concrete grade rings shall conform to ASTM Standard C-478 and shall be free from cracks, voids, and other defects. HDPE rings should conform to ASTM D-4976 and have an H-20 load rating. Bricks shall not be used to adjust the frame to finished grade, unless previously approved by BCUSD.

B. Interfaces between and among the manhole, manhole ring and grade rings shall be pre-formed plastic or butyl rubber gaskets meeting the requirements of federal specification SS-S-00210, Type 1, rope form. Minimum dimension of preformed material shall be one-half inch square.

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2.18 MISCELLANEOUS ITEMS

A. Other items necessary for the complete installation not specified herein shall conform to the details and notes shown on the Construction Drawings. All minor items implied, usually included, or required for the construction of a complete operating system shall be installed whether shown on the Construction Drawings or not.

PART 3 - EXECUTION

3.01 INSPECTION

A. All pipe shall be inspected and tested at the foundry.

B. All pipe, fittings, valves, and other material shall be subject to inspection and approval by the Engineer after delivery, and no broken, cracked, imperfectly coated, or otherwise damaged or unsatisfactory material shall be used. When a defect or crack is discovered, the damaged portion shall not be installed. Cracked pipe shall have the defect cut off at least 12 inches from the break into the sound section of the barrel.

C. The Utility shall have the right to have any or all piping, fittings or special castings inspected and tested by an independent testing agency at the foundry or elsewhere.

D. Such inspection and testing will be at the Utility’s expense.

E. All pipe lengths showing a crack, damaged lining, or receiving a severe blow that may cause an incipient fracture, even though no such fracture can be seen shall be mark as rejected and immediately remove from the job site.

3.02 GENERAL INSTALLATION REQUIREMENTS

A. Excavation, backfill, and compaction shall conform to specifications given elsewhere in these criteria. Upon satisfactory installation of the pipe bedding material, a continuous trough for the pipe barrel and recesses for the pipe bells or couplings shall be excavated by hand digging. When the pipe is laid in the prepared trench, true to line and grade, the pipe barrel shall receive continuous, uniform support and no pressure shall be exerted on the pipe joints from the trench bottom.

B. Cover for underground piping shall not be less than that indicated on the Drawings.

The minimum cover for pipe shall be 36 inches. In areas where piping conflicts preclude the minimum cover desired, the piping shall be laid to provide the maximum cover obtainable as directed by Utility Service’s staff.

C. Pipe, fittings, valves, and accessories shall be installed as shown or indicated on the Drawings.

D. All connections to existing piping systems shall be made as shown or indicated on the Drawings after consultation and cooperation with representatives of the Utility. Some such connections may have to be made during off-peak hours (late night or early morning).

E. Pipe and fittings shall be laid accurately to the lines and grades indicated on Drawings.

Where grades for the pipeline are not indicated on the Drawings, maintain a uniform depth of cover with respect to finish grade. Care shall be taken to ensure a good

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Pub. 11/2020 alignment both horizontally and vertically and to give the pipe a firm bearing along its entire length. Any pipe which has its grade or joint disturbed after laying shall be taken up and re-laid.

F. All pipe and fittings shall be cleared of sand, dirt, and debris before laying. All precautions shall be taken to prevent sand, dirt or other foreign material from entering the pipe during installation. If necessary, a heavy, tightly woven canvas bag of suitable size shall be placed over each end of the pipe before lowering into the trench and left there until the connection is made to the adjacent pipe. Any sand, dirt, or other foreign material that enters the pipe shall be removed from the pipe immediately. Interior of all pipe and fittings shall be kept clean after installation until accepted in the complete work.

G. Any time that pipe installation is not in progress, the open ends of pipe shall be closed by a watertight plug or other method approved by the Utility. Plugs shall remain in pipe ends until all water is removed from the trench. No pipe shall be installed when trench conditions are unsuitable for such work, including standing water, excess mud, or rain.

H. After pipe has been laid, inspected, and found satisfactory, sufficient backfill shall be placed along the pipe barrel to hold the pipe securely in place while conducting the preliminary hydrostatic test. Leave joints exposed to view for the detection of visible leaks until the preliminary test is satisfactorily completed, I. Piping shall be cut accurately to measurements established at the job site and shall be worked into place without springing or forcing. Changes in sizes shall be made with appropriate reducing fittings. Pipe connections shall be made in accordance with the details shown and manufacturer's recommendations. Open ends of pipe lines shall be properly capped or plugged during installation to keep dirt and other foreign material out of the system. Pipe supports and hangers shall be provided where indicated or as required to insure adequate support of the piping.

3.03 TRACING WIRE

A. Lay the tracing wire continuously on the top of the pipe. Splices shall be with a wire nut.

B. Wire shall be brought up in each valve box that is over 48 inches in length.

C. Tracing wire shall be #14 UF insulated solid copper wire.

D. For pipe installed by horizontal directional drill, a minimum of 2 tracer wires shall be used.

3.04 INSTALLATION OF DUCTILE IRON PIPE

A. Handling and Cutting Pipe:

1. Care shall be taken in handling, cutting, and laying ductile iron pipe and fittings to avoid damaging the pipe and interior coal tar epoxy or cement mortar lining, scratching or marring machined surfaces, and abrasion of the pipe coating. All cracked pipe and fittings shall be removed at once from the work at no additional cost to the Utility.

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2. Pipe cutting shall be done in a neat workmanlike manner without creating damage to the pipe and interior epoxy or cement mortar lining. Ductile iron pipe may be cut using an abrasive pipe saw, rotary wheel cutter, guillotine pipe saw, milling wheel saw or oxyacetylene torch. Cut ends and rough edges of ductile iron pipe shall be ground smooth. For push-on joint connections, the cut end shall be beveled to prevent gasket damage during joint assembly.

Interior lining shall be repaired at cut ends per the manufacturer's instructions prior to joint assembly.

B. Laying Pipe and Fittings:

1. Bedding for Ductile Iron Pipe: Minimum bedding requirements shall be Type 2 as defined in ANSI/AWWA C 600, latest revision. Provide proper bedding required, in accordance with thickness class of pipe being laid and depth of cover. Proper pipe laying conditions shall be in accordance with ANSI/AWWA C 150, C 151, latest revisions, and ANSI/AWWA C 600, latest revision.

C. Ductile Iron Pipe Joints:

1. The joints of all pipelines shall be made absolutely tight. The particular joint used shall be approved by the Utility prior to installation. Where shown on the Drawings or where, in the opinion of the Engineer, settlement or vibration is likely to occur, all pipe joints shall be bolted mechanical type or restrained type as specified above, or as indicated on the Drawings.

2. Push-on joints shall be made in strict accordance with the manufacturer's recommendations. Lubricant, if required, shall be an NSF approved, inert, non-toxic, water soluble compound incapable of harboring, supporting, or culturing bacterial life. Manufacturer's installation recommendations shall be submitted to the Engineer for review and approval before commencing work. The bell of the pipe shall be cleaned of excess tar or other obstructions and wiped out before the cleaned and prepared spigot of the next pipe is inserted. The new pipe shall be shoved firmly into place until properly seated and held securely until the joint has been completed.

3. All types of mechanical joint pipes shall be laid and jointed in full conformance with manufacturer's recommendations, which shall be submitted to the Engineer for review and approval before work is begun. Only specially skilled workmen shall be permitted to makeup mechanical joints. Torque wrenches, set as specified in AWWA Standard C 111, shall be used; or spanner type wrenches not longer than specified therein may be used without the permission of the Engineer.

4. Restrained joints shall be provided where indicated on the Drawings. Joint assembly shall be made in strict accordance with the manufacturer's instructions, which shall be submitted to the Engineer for review and approval before commencing work.

5. Flanged joints shall be made up by inserting the gasket between the flanges.

The threads of the bolts and the faces of the gaskets shall be coated with suitable lubricant immediately before installation.

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i. Bolt holes of flanges shall straddle the horizontal and vertical centerlines of the pipe. Clean flanges by wire brushing before installing flanged fittings. Clean flange bolts and nuts by wire brushing lubricate bolts with oil and graphite.

ii. Insert the nuts and bolts (or studs) finger tighten, and progressively tighten diametrically opposite bolts uniformly around the flange to the proper tension.

iii. Execute care when tightening joints to prevent undue strain upon valves, pumps and other equipment.

iv. If flanges leak under pressure testing, loosen or remove the nuts and bolts, reset or replace the gasket, reinstall or retighten the bolts and nuts, and retest the joints. Joints shall be watertight.

3.05 INSTALLATION OF PVC PIPE

A. Storage and Handling:

1. PVC pipe shall be delivered to the site in unbroken bundles packaged in such manner as to provide protection against damage. When possible, pipe should be stored at the job site in the unit packages until ready for use. Packaged units shall be handled using a forklift or a spreader bar with fabric straps.

Packaged units shall not be stacked at the job site higher than two units high.

2. When it is necessary to store PVC pipe for periods greater than six months, exposure to direct sunlight shall be prevented by covering the pipe with an opaque material. Adequate air circulation above and around the pipe shall be provided as required to prevent excessive heat accumulation. PVC pipe shall not be stored close to heat sources of hot objects such as heaters, fires, boilers or engine exhaust. Pipe gaskets shall be protected from excessive exposure to heat, direct sunlight, ozone, oil and grease. The interior and all sealing surfaces of pipe, fittings, and other appurtenances shall be kept clean and free of dirt and foreign matter.

3. Care shall be taken in handling and laying pipe and fittings to avoid severe impact blows, crushing, abrasion damage, gouging or cutting. Pipe shall be lowered, not dropped, from trucks or into trenches. All cracked, damaged, or defective pipe and fittings, or any length of PVC pipe having a gouge, scratch or other permanent indentation of more than 10 percent of the wall thickness in depth, shall be rejected and removed at once from the work and replaced with new acceptable pipe at no additional cost to the Utility.

4. Pipe exceeding manufacturer tolerance for “roundness” will not be accepted.

B. Field cutting of pipe shall be done in a neat workmanlike manner without creating damage to the pipe.

1. The pipe shall be cut square with a fine- toothed hand or power saw or other cutter or knife designed for use with plastic pipe. Prior to cutting, the pipe shall be marked around its entire circumference or a square-in vise shall be

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Pub. 11/2020 used to ensure the pipe end is cut square. Remove burrs by smoothing edges with a knife, file, or sandpaper.

2. Bevel the cut end of the pipe using a pipe beveling tool, wood rasp or portable sander to prevent damage to the gasket during joint assembly. A factory-finished beveled end should be used as a guide to ensure proper beveling angle and correct depth of bevel. Round off any sharp edges on the leading edge of the bevel with a knife or file.

C. Laying PVC Pipe:

1. All PVC pipe shall be…