36C26120R0040 Combined Specifications.pdf

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Renovate CWT Home Project No. 640A0-20-104 VA Medical Center, Menlo Park, CA

PLANTING IRRIGATION

32 84 00 - 1

SECTION 32 84 00

PART 1 - GENERAL

1.1 DESCRIPTION

A. This Section specifies materials and procedures for furnishing and installing a complete automatically-controlled irrigation system, including controller, piping, valves, fittings, control wiring, electrical connections, drip emitters, drip emitter tubing, dripline, bubblers, and all other necessary accessories as shown on the

Drawings and described herein.

1.2 RELATED REQUIREMENTS

A. Section 32 90 00, PLANTING

1.3 ABBREVIATIONS

A. FPT: Female pipe thread

B. HDPE: high-density polyethylene plastic

C. PVC: Polyvinyl chloride plastic D. PE: Polyethylene

E. O.D.: Outside diameter F. I.D.: Inside diameter

G. GPH: Gallons per hour

H. GPM: Gallons per minute I. IPS: Iron pipe size

1.4 REFERENCE, CODES AND STANDARDS

A. All current International Building Code, state, local, federal, and VA codes, standards, regulations, and ADA requirements shall pertain to this project. These may include but not limited to, architectural, structural, mechanical, electrical, fire and life safety codes. The project shall follow the most stringent and current rules codes, standards, and regulations.

AB1881 State of California Model Water Efficient Landscape

Ordinance, California Code of Regulation

Water Use Classification of Landscape Species (WUCOLS)

America Society of Irrigation Consultant (ASIC) Design Guidelines California Landscape Standards, California Landscape Contractors

Association (CLCA), Sacramento, California

32 84 00 - 2

CAL-OSHA, Title 8, Subchapter 4-Construciton Safety Orders, and

Subchapter 7-General Industry Safety Orders

NFPA 70, National Electrical Code (NEC)

California Electrical Code Uniform Plumbing Code (UPC)

California Plumbing Code (CPC)

National Fire Protection Association (NFPA) 24, Section 10.4 Depth of Cover

Underwriters Laboratories (UL): Electrical wiring, controls, motors and devices, UL listed and so labeled.

American Society of Testing Materials (ASTM)

1.5 APPLICABLE PUBLICATIONS

A. The publications listed below form a part of this specification to the extent referenced. The publications are referenced in the text by the basic designation only.

B. American Society Of Mechanical Engineers (ASME):

B16.18-2012 ........Cast Copper Alloy Solder Joint Pressure

Fittings

B16.22-2012 ........Wrought Copper and Copper Alloy Solder Joint

Pressure Fittings

B16.24-2011 ........Cast Copper Alloy Pipe Flanges and Flanged

Fittings: Classes 150, 300, 600, 900, 1500 and

B18.2.1-2012 .......Square, Hex, Heavy Hex, and Askew Head Bolts and Hex, Heavy Hex, Hex Flange, Lobed Head, and

Lag Screws (Inch Series)

B40.100-2005 .......Pressure Gauges and Gauge Attachments

C. American Society Of Sanitary Engineering (ASSE):

1013-2011 ..........Reduced Pressure Principle Backflow Preventers and Reduced Pressure Principle Fire Protection

Backflow Preventers

D. American Society For Testing And Materials (ASTM):

A536-84 (R2009) ....Ductile Iron Castings

B32-08 .............Solder Metal

B61-08 .............Steam or Valve Bronze Castings

32 84 00 - 3

B62-09 .............Composition Bronze or Ounce Metal Castings

B88/B88M-09 ........Seamless Copper Water Tube

B813-10 ............Liquid and Paste Fluxes for Soldering of Copper and Copper Alloy Tube

D1785-12 ...........Poly(Vinyl Chloride) (PVC) Plastic Pipe, Schedule 40, 80, and 120

D2241-09 ...........Poly(Vinyl Chloride) (PVC) Pressure Rated Pipe

(SDR Series)

D2464-13 ...........Threaded Poly (Vinyl Chloride) (PVC) Plastic

Pipe Fittings, Schedule 80

D2466-06 ...........Poly(Vinyl Chloride) (PVC) Plastic Pipe

Fittings, Schedule 40

D2467-13 ...........Poly(Vinyl Chloride) (PVC) Plastic Pipe

Fittings, Schedule 80

D2564-12 ...........Solvent Cements for Poly (Vinyl Chloride) (PVC)

Plastic Piping Systems

D2609-02(2008) .....Plastic Insert Fittings for Polyethylene (PE)

Plastic Pipe

D2683-10 ...........Socket-Type Polyethylene Fittings for Outside

Diameter-Controlled Polyethylene Pipe and

Tubing

D2855-96(2010) .....Making Solvent Cemented Joints with Poly (Vinyl

Chloride) (PVC) Pipe and Fittings

D3261-12 ...........Butt Heat Fusion Polyethylene (PE) Plastic

Fittings for Polyethylene (PE) Plastic Pipe and

Tubing

F477-10 ............Elastomeric Seals (Gaskets) for Joining Plastic

Pipe

F656-10 ............Primers for Use in Solvent Cement Joints of

Poly(Vinyl Chloride) (PVC) Plastic Pipe and

Fittings

F771-99(2005) ......Polyethylene (PE) Thermoplastic High-Pressure

Irrigation Pipeline Systems

E. American Water Works Association (AWWA):

32 84 00 - 4

C500-09 ............Metal-Seated Gate Valve for Water Supply

Service

C504-10 ............Rubber-Seated Butterfly Valves

C906-07 ............Polyethylene (PE) Pressure Pipe and Fittings, 4

in. through 63 in., for Water Distribution and

Transmission

F. American Welding Society (AWS):

A5.8/A5.8M:2011 ....Filler Metals for Brazing and Braze Welding

G. Manufacturers Standardization Society (MSS):

SP-70-2011 .........Gray Iron Gate Valves, Flanged and Thread Ends

1.6 QUALITY ASSURANCE:

A. General Criteria The Contractor, personally or through an authorized representative, shall supervise the work constantly, and shall keep the same foreman and workers on the job from commencement to completion.

The Contractor should be an employer of workers that include a landscaping contractor licensed by the State of California.

Contractor shall have a minimum of five (5) years of experience in installing irrigation systems of a similar size.

B. Products Criteria:

When two or more units of the same type or class of materials or equipment are required, these units shall be products of one manufacturer.

A nameplate bearing manufacturer's name or trademark, including model number, shall be securely affixed in a conspicuous place on equipment. In addition, the model number shall be cast integrally with equipment, or stamped, or otherwise permanently marked on each item of equipment.

C. System Requirements:

Full and complete coverage is required. The Contractor shall, at no additional cost to the Government, make minor adjustments necessary to avoid plantings and obstructions such as signs, utilities and light standards to achieve full and complete coverage of irrigated areas without overspray on roadways, sidewalks, window wells, and buildings, and to protect trees from close high spray velocity.

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Detailed system shall be done by the Contractor conforming to the requirements of the drawings and these specifications. All areas shall be irrigated by either in-line drip emitters or surface drip emitters, without the use of small diameter (1/4”) “spaghetti” tubing.

1.7 SUBMITTALS

A. Qualification Data Provide qualification data, including contractor license and certificate by Irrigation Association, and a list of three (3) projects of similar size and three (3) references.

B. Material List

Submit product data as one package for each type of product indicated. Include rated capacities, operating characteristics, electrical characteristics, and furnished specialties and accessories. Complete material list shall be submitted prior to performing any work.

Equipment or materials installed or furnished without prior approval of the Contracting Officer’s Representative may be rejected and the Contractor required to remove such materials from the site at Contractor’s own expense.

C. As-Built Drawings

The Contractor shall provide as-built drawings.

The original “as-built” plan shall be submitted to the Contracting

Officer’s Representative for approval prior to preparing the final

As-Built prints, PDF and CAD files, and producing Controller Chart.

See 1.7D for Controller Chart.

Drawings shall include depth, if applicable, and dimensions from two permanent points of reference, building corners, sidewalk, or road intersections, providing the location of the following items:

a. Connection to existing water lines

b. Connection to existing electrical power

c. Relocated existing equipment

d. Gate valves

e. Routing of sprinkler pressure lines (dimension maximum 100 feet along routing)

f. Sprinkler control valves

32 84 00 - 6

g. Routing of control wiring (dimension maximum 100 feet along routing)

h. Quick coupling valves

i. Controller location

j. Other related equipment as directed by the Contracting Officer’s

Representative

Identify all valves as to size, station, number and type of irrigation. All changes made during construction shall be shown in color red. Label plans "AS-BUILT" with date and the General

Contractor’s and Landscape Contractor’s name, address and phone number.

Submit the approved As-Built drawings as a hard copy at original scale, an electronic PDF file, and an electronic CAD file in conformance with the VA CAD Standards. Deliver the above items to the Contracting Officer’s Representative prior to final inspection.

All costs associated with this work will be included in the

Contract prices paid for the various items of work and no additional compensation will be allowed therefore.

D. Controller Chart Provide one laminated controller chart showing the area covered by controller for each automatic controller supplied at the maximum size controller door will allow. Chart shall be a reduced drawing of the actual "as-built" system. If controller sequence is not legible when the drawing is reduced to door size, the drawing shall be enlarged to a size that is readable and placed folded, in a sealed plastic container, inside the controller door.

Controller chart shall be a blackline print with a different color used to show area of coverage for each station. Charts must be completed and approved by the Contracting Officer’s Representative prior to final inspection of the irrigation system.

E. Maintenance and Operating Instructions and Manuals

Contractor shall prepare an Operation and Maintenance Manual, organized in a 3-ring binder, containing the following information.

a. Contractor's name, address, and telephone number

b. Duration of guarantee, periods as specified herein

c. List of equipment with names and addresses of local manufacturer's representatives with duration of written warranties

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d. Complete operating and maintenance instructions on all equipment

e. Spare parts lists and related manufacturer's information Submit two (2) copies of the Operation and Maintenance Manual to the Contracting Officer’s Representative within 10 Calendar Days of completion of work of this Section and as a condition of project acceptance.

In addition to the above-mentioned maintenance manuals, provide the Government’s maintenance personnel with training at the jobsite to provide instructions for major components. Training shall be conducted to the satisfaction of the Contracting Officer’s

Representative. Contractor shall be required to repeat the training at his own expense until the Contracting Officer’s

Representative has concluded that the training has been conducted satisfactorily.

1.8 SPARE PARTS / EXTRA MATERIALS

A. Furnish spare parts / extra materials, as listed below, that match products installed. The extra materials shall be packaged with protective covering for storage and identified with labels describing contents.

Drip system emitter tubing and dripline tubing: Provide 50 feet of each tubing size installed for the project.

Two (2) sets of special tools required for removing, disassembling and adjusting each type of sprinkler and valve installed for the project.

Two (2) - 5 foot valve keys for operation of gates valves.

Two (2) keys for each automatic controller.

Two (2) quick coupler keys and matching hose swivels for every type of quick coupling valve installed.

B. The above-mentioned equipment shall be delivered to the Government at the conclusion of the project. Before final inspection can occur, evidence that the Government has received the spare parts / extra materials must be shown to the Contracting Officer’s Representative.

1.9 DELIVERY, STORAGE, AND HANDLING

A. Deliver piping with factory-applied end caps. Maintain end caps through shipping, storage, and handling to prevent pipe-end damage and to prevent entrance of dirt, debris, and moisture.

32 84 00 - 8

B. Store plastic piping protected from direct sunlight. Support pipe to prevent sagging and bending.

C. Any section of pipe that has been dented or damaged will be discarded and, if installed, be replaced with new piping.

1.10 WARRANTY

A. The Contractor shall remedy any defect due to faulty material or workmanship and pay for any damage to other work resulting there from within a period of one (1) year from final acceptance. Further, the

Contractor will provide all manufacturers’ and supplier's written guarantees and warranties covering materials and equipment furnished under this Contract.

PART 2 - PRODUCTS

2.1 PIPES AND FITTINGS

A. Comply with requirements in the piping schedule for applications of pipe, tube, and fitting materials, and for joining methods for specific services, service locations, and pipe sizes.

B. If dissimilar metal materials are used in the piping system, use the appropriate dielectric union to isolate the metals.

C. Hard Copper Tube: ASTM B88, Type L (ASTM B88, Type B) water tube, drawn temper

Copper pressure fittings: ASME B16.22, wrought-copper solder-joint fittings

Bronze flanges: ASME B16.24, Class 150, with solder-joint end

Copper unions: Cast-copper-alloy, hexagonal-stock body, with ball-and-socket, metal-to-metal seating surfaces and solder-joint or threaded ends

D. PVC pipe: Use only new, non-corroded, defect free materials of brands and types that meet the specified standards specified herein, or approved equals.

Irrigation Mains:

a. 3 inches and smaller: Polyvinyl Chloride (PVC) Pressure Pipe, 1120 - Schedule 40 PVC compound conforming to ASTM Specification

D 1785

Irrigation Laterals: Polyvinyl Chloride, ASTM D2241, PVC 1120, Schedule 40

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Threaded Pipe: Polyvinyl Chloride, ASTM D1785, PVC 1120, Schedule

80, for threaded connections, risers and swing joints

All PVC pipes shall bear the following markings:

a. Manufacturer's name

b. Nominal pipe size

c. Schedule of class

d. Pressure rating in psi

e. NSF (National Sanitation Foundation) approval

f. Date of extrusion E. Fittings:

Irrigation Mains (3 inches and smaller): Schedule 40, solvent welded socket type, ASTM D2466.

Irrigation Laterals: PVC, Schedule 40, solvent welded socket type, ASTM D2466.

Threaded Pipe: Schedule 80, ASTM D2464

Swing Joints: Threaded fittings with elastomeric seals that allow

360-degree rotation, and designed for minimum 200 psi working pressure, may be used in lieu of standard threaded fittings.

2.2 PIPE JOINING MATERIALS

A. Bolts and nuts: ASME B18.2.1, carbon steel unless otherwise indicated.

B. Solvent cements for joining PVC piping: ASTM D2564. Include primer according to ASTM F656.

C. Plastic fittings: Type and material recommended by piping system manufacturer unless otherwise indicated.

2.3 VALVES

A. Underground Manual Shut-Off Valves:

1. Gate valves (3 inches and smaller): Bronze body, Screw-in Bonnet, Threaded with Cross Handle non-rising stem turning clockwise to close, 200 psi minimum working pressure.

2. Operations:

a. Underground: furnish valves with square or T-Handle (depending on size) socket wrench for operation.

b. Ends of valves shall accommodate the type of pipe installed.

B. Check Valves: Swing or spring. High impact PVC Type II body and bonnet, with minimum working pressure of 235 psi

C. Pressure Reducing Valve: Bronze body with stainless steel strainer and union

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D. Ball Valves (2 inch and smaller): Full-port ball valves with Schedule

80 PVC body, O-Ring under seat, and 90 degree on/off handle. Ball valves to have union NPT female end connections.

E. Remote Control Valves:

Valves shall be globe type of heavy duty construction and shall have manual shut-off and flow control adjustment and provide for manual operation.

F. Glass-filled nylon body, furnished as straight or angle pattern type, normally closed diaphragm type with manual shut off and flow control adjustment.

a. Install valves with unions on each side to allow for easy removal.

b. Valves shall have a minimum of 150 psi working pressure.

c. Each sprinkler section shall be automatically operated by a remote control valve installed underground and operated by a 24 volt AC electric solenoid.

d. Each valve shall be in a valve box.

G. Valves to operate at no more than 7 psi pressure loss at manufacturers maximum recommended flow rate.

H. Valves shall be completely serviceable from the top without removing valve body from the system.

2.4 VALVE BOXES

A. General Dimensions per valve type:

Gate Valve and Quick Coupler: 10 inches, Round B. Remote Control Valve: 14 inches W x 19 inches L x 12 inches D, Rectangular shaped.

C. Remote Control Valve (Drip): 20 inches W x 26 inches L x 12 inches D, Rectangular shaped.

D. Drip components: Top diameter to be 6 inches minimum, height of box to be 10-1/4 inches.

E. Gate valve and quick coupler valve boxes shall be round made of reinforced plastic with a lid constructed from HDPE, color: black. Box dimension shall be adapted to depth of cover required over pipe at valve location. Box shall have a bolt down lid.

Set box cover flush with finish grade.

Label boxes by heat branding “GV” for gate valve or “QC” for quick coupler, into the lid. Size of letters shall be a minimum of 2

32 84 00 - 11 inches. Letters shall be located at center of valve cover and shall face nearest main road or service road.

F. Remote control valve boxes shall be HDPE structural foam Type A, Class

III, color: black. Box shall have a bolt down lid.

Set box cover flush with finish grade.

G. Label boxes by heat branding the designated controller and circuit number into the lid. Size of numbers shall be a minimum two (2) inches. Numbers shall be located at center of valve cover and shall facenearest main road or service road.

H. Drip zone components: Round reinforced plastic valve box and lid constructed from HDPE, color: black. Lid shall have lift-hole for opening. Box shall have a bolt down lid.

I. All valve boxes in pavement shall be precast concrete with a cast iron lid. Compressive concrete strength shall be in excess of 4000 psi. Box shall have a bolt down lid.

J. Provide tampered proof bolts for all lids.

2.5 BACKFLOW PREVENTER

A. Reduced pressure principle backflow preventer: ASSE 1013, at each new connection to water distribution system.

2.6 STRAINER

A. Brass strainer basket: Bodies smaller than 2-1/2 inches shall be brass or bronze. Bodies 2-1/2 inches and larger shall be cast iron or semi-steel. Strainer cover shall be furnished with blow-off connection and shut-off valve to accommodate 3/4 inch diameter hose connection.

2.7 PRESSURE GAUGES

A. Pressure gauges: ASME B40.100, 4-1/2 inches diameter, all metal case, with bottom connection. Dial shall be white lacquered throughout with maximum graduations of 2 psi. Provide shut-off cocks.

2.8 RAIN SENSOR

A. The rain sensor shall be capable of turning off the irrigation system due to the onset of precipitation, depending on the intensity. Sensor can be wired or wireless.

B. The rain sensor shall be compatible with the automatic controller equipment.

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2.9 AUTOMATIC CONTROL EQUIPMENT - INDEPENDENT ELECTRIC CONTROLLERS

A. The electric automatic control system shall consist of one or more independent controllers that operate individual remote control valves in accordance with timing schedules programmed into the independent units. The number of units and location of the installations are shown on the Drawings.

B. The Controller System shall consist of an independent controller, rain sensor and all accessories necessary to operate the irrigation system.

All of these components and software shall be a standard package.

C. The independent controller shall be UL and C-UL approved and have the following equipment, characteristics and capabilities:

A minimum of three (3) completely independent programs with two (2) start times

a. Watering time for each station shall be capable of being set from in 1 minute increments, at minimum.

b. Watering days for each program shall be capable of being based on a seven-day week or a skip-a-day routine allowing a program to skip from 1 to 30 days.

D. A real time clock that retains the actual time during power outages without batteries, eliminating the need to reset the clock in case of power outages

E. A non-volatile memory that retains the program(s) indefinitely during power outages or seasonal shutdowns

F. Built-in remote control capability G. A percentage key to increase or decrease all station runtimes on a percentage basis in 1 percent increments from 0 to 300 percent by program.

H. The ability to select cycle and soak

I. Rain shut down to allow the selection for the number of days the controller will stay off in rain shut down mode before it goes back to the automatic mode.

J. Controller shall be housed in a wall mount enclosure. The controller will be housed within a NEMA 3R-rated, weather-resistant, UL-approved enclosure with a key-locking entry.

K. The controller shall be remote control ready.

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2.10 MAINTENANCE REMOTE

A. Remote shall include a hand held transmitter that is compatible and communicates with the controller.

B. Operating range shall be up to 1000’ (line-of-sight).

2.11 DRIP SYSTEMS

A. Drip Emitter Tubing:

Tubing shall be a minimum of 1/2 inch polyethylene tubing with a minimum wall thickness of 0.045 inch.

B. Drip Emitters:

Emitters shall be of the pressure compensating emitters with self-piercing barb inlet permitting one-step insertion into drip tubing.

C. Each plant shall receive two (2) – 1 GPH emitters D. Dripline (In Line Drip) Tubing:

Dripline tubing shall be made of UV resistant material with impregnated emitters. Tubing shall be linear low-density 5/8 inch polyethylene with a minimum wall thickness of 0.045 inch.

Emitter shall have dual discharge ports on opposing sides of the

The tubing shall have the emitters spaced every 12 or 18 inches, and flow rate to be determined.

The emitters shall be continuously self-flushing and pressure-compensating.

The dripline tubing row spacing shall be 12 or 18 inches on center.

The dripline tubing with emitters shall be manufactured with root intrusion technology.

E. Drip Accessories: Provide a dripline flush valve, air relief valve and operation indicator as required and detailed. Accessories shall be manufactured by the same manufacturer as the dripline tubing.

2.12 QUICK COUPLERS

A. Quick couplers shall have all parts contained in a two-piece unit and shall consist of a coupler water seal valve assembly and a removable upper body to allow the spring and key track to be serviced without shut down of the main.

B. Metal parts shall be brass.

C. Lids shall be lockable vinyl covered and have springs for positive closure on key removal. Also see 2.4 VALVE BOXES of this Section.

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2.13 LOW VOLTAGE CONTROL VALVE WIRE

A. Wire shall be solid copper wire, Underwriters Laboratories Inc.

approved for direct burial in ground.

B. Size of control wire shall be in accordance with manufacturer's recommendations, never less than No. 14.

C. Wire colors shall be as follows:

Common ground wire shall have white insulating jacket Control wire shall have a red insulating jacket

Spare wires shall have a yellow insulating jacket Master valve control wire shall have a blue insulating jacket

D. Flow sensor shall have one orange and one black insulating jacket

E. Provide a separate ground wire for each controller. Where there is more than one controller, provide a different color control wire for each controller.

F. Weather sensor / Rain sensor wire shall be 18 gauge, 2-conductor direct burial wire. Wire run shall be no longer than 100 feet. Wire shall be black in color.

2.14 SPLICING MATERIALS:

A. Splicing materials shall be epoxy waterproof sealing packet.

2.15 SLEEVE MATERIAL

A. ASTM D2241, PVC Schedule 40

B. White color pipe for water C. Grey color pipe for wires

2.16 WARNING TAPE

A. Provide standard, 4-Mil polyethylene 3 inch wide tape, detectable type blue with black letters and imprinted with “CAUTION BURIED IRRIGATION

WATER LINE BELOW” above all main lines.

2.17 TRACER WIRES

A. Tracer Wires shall be No. 14, Green, Type TW plastic-coated copper tracer wire shall be installed with irrigation main lines.

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PART 3 - EXECUTION

3.1 PREPARATION

A. Examine proposed irrigation areas for compliance with requirements and conditions affecting installation and performance.

B. Set flags to identify locations of proposed irrigation system – main line routing, valves and sprinklers. Obtain approval of the layout by the Contracting Officer’s Representative before excavation.

3.2 PIPE INSTALLATION - GENERAL

A. Layout work as closely as possible to Drawings. Swing joints, offsets and all fittings are not shown. Lines are to be in a common trench wherever possible.

B. Install sprinkler lines to avoid underground utilities, such as, but not limited to: heating, ventilating, and air conditioning trenches;

electric ducts; steam, condensate, chilled water, storm and sanitary sewer lines; and existing water and gas mains; all of which have the right of way.

C. Existing sidewalks and curbs shall not be cut during trenching and installation of pipe. Install pipe under sidewalks and curbs by jacking, auger boring, or by tunneling. Repair or replace any cracked concrete, due to settling, during the warranty period.

D. Do not lay pipe on unstable material, in wet trenches or, in the opinion of Contracting Officer’s Representative, when trench or weather conditions are unsuitable for work.

E. Allow a minimum of 4 inches between parallel pipes in the same trench.

F. Clean the interior portion of pipe and fittings of foreign matter before installation. Securely close open ends of pipe and fittings with caps or plugs to protect fixtures and equipment against dirt, water and chemical or mechanical injury. At completion of all work thoroughly clean fixtures, exposed materials and equipment.

G. The full length of each section of pipe shall rest upon the pipe bed with recesses excavated to accommodate bells or joints. Do not lay pipe on wood blocking.

H. Hold pipe securely in place while joint is being made.

I. Do not work over, or walk on, pipe in trenches until covered by layers of earth, well tamped, in place to a depth of 12 inches over pipe.

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J. Connect new system to existing mains or new point of connection as required.

Coordinate capping, rerouting, and required modifications to adjacent existing irrigation systems prior to the start of demolition and excavation work.

K. Ensure that existing irrigation systems adjacent to and beyond the project limits are and remain fully functional and protected from construction damage.

L. Work includes, but not necessarily limited to, the following:

a. Protect the existing irrigation systems mainline water sources and install new mainline connections to provide and maintain water to existing plants served by the existing irrigation systems.

b. Protect electrical low voltage wire connections from the existing irrigation controllers to remote control valves serving existing irrigation systems beyond the project limits and/or install new wires so that existing irrigation systems remain fully functional at all times.

c. Test and repair existing irrigation systems as required and directed by the Contracting Officer’s Representative.

M. Remove existing irrigation equipment within the project limits as required and directed by the Contracting Officer’s Representative.

Minimum cover over water mains shall be 18 inches. Cover laterals to minimum depth of 12 inches.

N. Warning tape shall be continuously placed 3 inches above sprinkler system water mains.

O. Backfill and Compacting Backfill excavations and trenches with clean soil, free of debris.

P. Regardless of the type of pipe covered, compact to minimum 95% density under pavements and 85% under planted areas.

Q. Firmly compact soil around swing joints and sprinklers to minimize settling.

R. Dress off areas to finish grades. Re-dress any areas that subsequently settle.

32 84 00 - 17

3.3 PLASTIC PIPE INSTALLATION

A. Plastic pipe shall be snaked in trench at least 1 foot per 100 feet to allow for thermal construction and expansion and to reduce strain on connections.

B. Joints

Solvent Welded Socket Type: ASTM D2855

C. Threaded Type: Apply liquid teflon thread lubricant on threaded joints. After joint is made hand tight (hard), a strap wrench should be used to make up to two additional full turns.

3.4 SLEEVE INSTALLATION

A. Furnish and install where pipe and control wires pass under walks, paving, walls, and other similar areas.

B. Use grey color pipe for wires and white pipe for water lines.

C. Sleeves to be twice line size or greater to accommodate retrieval for repair of wiring or piping and shall extend 12 inches beyond edges of paving or construction.

D. Bed sleeves with a minimum of 4 inches of sand backfill above top of pipe in areas where pipe is placed prior to hardscape is installed.

3.5 VALVE INSTALLATION

A. Install valves where shown on Drawings and group together where practical. Limit one remote control valve per box.

B. Locate valve boxes 12 inches from and perpendicular to walk edges, buildings, and walls. Provide 12 inches between valve boxes where valves are grouped together.

C. Thoroughly flush main line before installing valves.

D. Clean interior of valves of foreign matter before installation.

E. Install valves in shrub or groundcover areas where possible.

F. No valves shall be set under roads, pavement or walks. Label control line wire at each valve with a 2-1/4 inch by 2-3/4 inch polyurethane identification tag, indicated identification number of valve

(controller and station number). Attach label to control wire.

G. Place gopher wire mesh under the valve box and wrap up each side a minimum of 6 inches. Wire mesh shall be 19 gauge galvanized steel with

½ inch mesh.

H. Install 4 inch layer of pea gravel or 3/4 inch drain rock on top of the wire mesh at the bottom of the valve box.

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I. Set valve box cover flush with finished grade.

J. Heat brand controller and station number or valve type (gate valve or quick coupler) into the valve box lid.

3.6 QUICK COUPLER INSTALLATION

A. Quick couplers shall be placed on temporary nipples extending at least

3 inches above finished grade. After turf is established, remove temporary nipples, ensuring that no dirt or foreign matter enters outlet, and install quick couplers at ground surface as detailed.

B. Install all quick couplers on swing joints, as detailed on Drawings.

C. Flush all main and lateral lines prior to the installation of sprinkler heads and quick couplers.

3.7 DRIP EMITTER TUBING INSTALLATION

A. Thoroughly flush all lateral lines before installing drip emitter

B. Install as per manufacturer’s recommendations.

C. Install drip emitter tubing with direct-attached emitters on grade, stake down every four (4) feet and at every fitting. Cover with a minimum 2 inches of mulch.

D. Install pressure regulators and filter units in control valve boxes E. Adaptation from PVC Schedule 40 fittings to flex vinyl hose shall be line size by 3/8 inch insert bushings.

F. Tape all ends during installation and do not allow dirt or debris to enter tubing.

G. Use fittings at sharp bends and do not allow dripper line to kink.

H. Install a minimum two (2)automatic flush valves per zone at the low points and ends of the zone.

I. Use manufacturer recommended fittings for all changes in direction.

3.8 DRIPLINE (IN LINE) TUBING INSTALLATION

A. Thoroughly flush all lateral lines before installing dripline tubing.

B. Install as per manufactures recommendations.

C. Install dripline tubing with impregnated emitters 2 to 4 inches below grade, staked down every four (4) feet and at every fitting. Cover with a minimum 2 inches of mulch.

D. Install dripline in a grid pattern utilizing the specified spacing.

Install per VA standard detail.

E. Install air relief valves at all high points on the system.

32 84 00 - 19

F. Install a minimum two (2)automatic flush valves per zone at the low points and ends of the zone.

G. Install a minimum two (2) operation indicators at the ends of the zone.

H. Install pressure regulators and filter units in control valve boxes.

I. Adaptation from PVC Schedule 40 fittings to drip tubing shall be line size by 3/4 inch hose thread.

J. Tape all ends during installation and do not allow dirt or debris to enter tubing

K. Use fittings at sharp bends and do not allow dripper line to kink

L. Use manufacturer recommended fittings for all changes in direction.

3.9 RAIN SENSOR

A. Mount sensor on suitable post, pole, gutter, or building. Mount in location where sensor is open to rainfall and out of sprinkler spray.

Sensor can be wired or wireless.

3.10 AUTOMATIC IRRIGATION - CONTROL SYSTEM INSTALLATION

A. Prior to the start of the irrigation installation, the Contractor shall arrange with the irrigation controller manufacturer to provide pre-installation instructions and training on the proper installation and start-up of the irrigation control system.

Install exterior wall mounted controller on wall

Place and secure anchorage devices. Use setting drawings, templates, diagrams, instructions, and directions furnished with items to be embedded.

B. Install anchor bolts to elevations required for proper attachment to supported equipment.

3.11 CONTROL WIRE INSTALLATION

A. Wiring from controller to valves and stub cuts for future extension shall be located in trench with new mains, unless cross-country route is shown. Locate in trench with mains when possible on cross-country routes.

B. Wiring bundles located with piping shall be set under the shoulder of the pipe. Wires shall be bundled, and tied or taped at 15 foot intervals. A numbered tag shall be provided at each end of a wire, i.e., at valve, at field located controllers. The wires at each end of

32 84 00 - 20 wire to be the same in number and color. Do not tape wires located within sleeves.

C. Install a minimum three (3) spare wires of a different color along the entire main line. The spare wires shall be pulled into every valve box or group of valves along the main line.

D. Splicing shall be held to a minimum. A pullbox shall be provided at each splice. No splices will be allowed between field located controllers and remote control valves.

E. Provide 12 inch expansion loops in wiring at each wire connection or change in wire direction. Provide 24 inch loop at remote control valves.

F. The power wire(s) for the operation of irrigation system shall not be run in same conduit as the irrigation control wire(s).

3.12 TRACER WIRE INSTALLATION

A. Tracer wire shall follow main line pipe and branch lines and terminate in yard box with gate valve controlling these main irrigation lines.

Provide sufficient length of wire to reach finish grade, bend back end of wire to make a loop and attach a plastic label with designation

"Tracer Wire."

B. Tracer wire shall be installed on bottom of trench, adjacent to vertical pipe projections, carefully installed to avoid stress from backfilling, and shall be continuous throughout length of pipe with spliced joints soldered and covered with insulation type tape.

C. Record locations of tracer wires and their terminations on project record documents.

3.13 EXISTING TREES

A. Where it is necessary to excavate adjacent to existing trees, the Contractor shall comply with the provision of Section 01 00 00 General

Requirements for the protection of existing vegetation.

B. Excavation in areas where 2 inch or larger roots occur shall be done by hand. All roots 2 inch and larger in diameter, except directly in the path of pipe or conduit, shall be tunneled under and shall be heavily wrapped with burlap, to prevent scarring or excessive drying.

C. Where a ditching machine is run close to trees having roots smaller than 2 inch in diameter, the wall of the trench adjacent to the tree shall be hand trimmed, making clean cuts through.

32 84 00 - 21

3.14 ADJUSTMENTS

A. Adjust settings of controllers to provide adequate water to each irrigation zone.

B. Contractor shall flush and adjust all sprinkler heads for optimum performance, and to prevent overspray onto walks, roadways, and building, as much as possible.

C. If it is determined that adjustments in the irrigation equipment will provide proper and more adequate coverage, the Contractor shall make such adjustments prior to planting. Adjustments may include changes in nozzle sizes and degrees of arc as required.

3.15 TESTING AND SITE OBERSERVATIONS

A. Coordinate scheduling testing / observations with the Contracting Officer’s Representative to inspect, test, and adjust components, assemblies, and equipment installations, including connections.

B. Observations conducted by persons other than the Contracting Officer’s

Representative shall not be permitted without prior written authorization of the Contracting Officer’s Representative.

C. No site observations will commence without as-built drawings. In the event the Contractor calls for a site visit without as-builts drawings, without completing previously noted corrections, or without preparing the system for said visit, he shall be responsible for reimbursing the Contracting Officer’s Representative at his current bill rates per hour portal to portal (plus transportation costs) for inconvenience. No further site visits will be scheduled until this charge has been paid and received.

D. Contractor shall be responsible for notifying the Contracting

Officer’s Representative in advance for the following inspections/observation meetings, according to the time indicated:

Pressure supply line installation and testing-48 hours Remote control valves (RCV) and lateral lines visual inspection –

48 hours

E. Coverage test-48 hours F. Final inspection- 7 days

G. Tests and Inspections:

Pressure supply line installation and testing:

a. Make hydrostatic tests with risers capped when welded PVC joints have cured at least 24 hours. Center load piping with backfill

32 84 00 - 22 to prevent pipe from moving under pressure. Keep all couplings and fittings exposed

b. Apply the following tests for solvent weld main line after welded plastic pipe joints have cured for at least 24 hours.

1) Remove all the air from the piping system then test live

(constant pressure) and quick coupler valve lines hydrostatically at 125 psi minimum. Lines will be approved if test pressure is maintained for six (6) hours. The

Contractor shall make tests and repairs as necessary until test conditions are met.

H. RCV and lateral lines visual inspection:

Test RCV controlled lateral lines with water at line pressure and visually inspect for leaks. Retest after correcting defects.

I. Coverage Test:

After electrical circuitry has been energized and final adjustment of the drip system have been complete, test each remote control valve with a visual coverage/wetting pattern test in the presence of the Contracting Officer’s Representative, to determine if the water coverage for planting areas is complete and adequate. Furnish all material and perform all work required to correct any inadequacies of coverage due to deviation from Drawings. Contractor is responsible to perform all work required correcting any inadequate coverage at his own expense where the system has been willfully installed as indicated on the Drawings and the coverage is obviously inadequate, without bringing this to the attention of the Contracting Officer’s Representative.

J. Final Inspection:

Operate controllers and automatic control valves to demonstrate the complete and successful installation and operation of all equipment.

Test and adjust controls and safeties. Replace damaged and malfunctioning controls and equipment. Any irrigation product will be considered defective if it does not pass tests and inspections.

3.16 FINAL INSTRUCTIONS AND DOCUMENTATION

A. Program controller according to approved irrigation schedule

32 84 00 - 23

B. Manufacturer of Control Systems shall certify control system is complete, including all related components, and operational. Submit certificate to Contracting Officer’s Representative.

C. As-Built Drawings:

Maintain and provide a complete set of As-Built drawings, which shall be corrected daily to show changes in locations of all pipe, valves, pumps and related irrigation equipment.

Prepare As-Built drawings showing location of all valves, lateral lines, and route of control wires.

See 1.7C As-Built Drawings of this Section for the requirements for the drawings.

D. Controller Chart Provide one controller chart showing the area covered by controller for each automatic controller

Use the approved As-Built drawings for the controller chart.

E. See 1.7D Controller Chart of this Section for the requirements for the controller chart.

F. Maintenance and Operating Instructions and Manuals

Prior to final acceptance, verbal instructions, for a period of not less than 8 hours, shall be provided to the operating personnel.

Multiple instructions may be required for a total of 8 hours.

Instructions shall be conducted to the satisfaction of the

Contracting Officer’s Representative. Contractor shall be required to repeat the training at Contractor’s own expense until the

Contracting Officer’s Representative has conclude that the training has be conducted satisfactorily.

G. Deliver manuals to the Contracting Officer’s Representative, within 10 Calendar Days of completion of work of this Section and as a condition of its acceptance, to the Contracting Officer’s Representative

H. See 1.7E Maintenance and Operating Instructions and Manuals of this

Section for the requirements for the Operation and Maintenance Manuals

3.17 MAINTENANCE PERIOD

A. Maintenance period duration to start on the date of the project final acceptance. The irrigation may be installed and final tested prior to the project completion; however, the system remains in the

Contractor’s possession until the project is certified complete and

32 84 00 - 24 formally turned over to the government. The Contracting Officer shall provide written documentation to the Contractor stating this date.

B. Maintain, make minor adjustments, repair and / or replace any breaks, malfunctions or deficiencies of the irrigation system for the full duration of the 90 day maintenance period.

C. The Contracting Officer’s Representative reserves the right to waive or shorten the maintenance period.

3.18 CLEAN UP

A. Remove all trash, debris, surplus materials and equipment from the project site when the work of this Section has been completed and at such other times as may be directed by the Contracting Officer’s

Representative.

3.19 WARRANTY

A. It shall be the responsibility of the Contractor to fill and repair all depressions and replace all necessary lawn, planting and hard surfaces due to the settlement of irrigation trenches, and to replace all necessary lawn and planting impacted by the lack of proper irrigation coverage due to workmanship for one (1) year following completion and acceptance of the job.

- - - E N D - - -

SECTION 32 84 00

SECTION 32 84 00

PLANTING IRRIGATION

PLANTING IRRIGATION

PART 1 - GENERAL

PART 1 - GENERAL

A. This Section specifies materials and procedures for furnishing and installing a complete automatically-controlled irrigation system, including controller, piping, valves, fittings, control wiring, electrical connections, drip emitters, drip emitter...

A. This Section specifies materials and procedures for furnishing and installing a complete automatically-controlled irrigation system, including controller, piping, valves, fittings, control wiring, electrical connections, drip emitters, drip emitter...

A. Section 32 90 00, PLANTING

A. Section 32 90 00, PLANTING

A. FPT: Female pipe thread

A. FPT: Female pipe thread

B. HDPE: high-density polyethylene plastic

B. HDPE: high-density polyethylene plastic

C. PVC: Polyvinyl chloride plastic

C. PVC: Polyvinyl chloride plastic

D. PE: Polyethylene

D. PE: Polyethylene

E. O.D.: Outside diameter

E. O.D.: Outside diameter

F. I.D.: Inside diameter

F. I.D.: Inside diameter

G. GPH: Gallons per hour

G. GPH: Gallons per hour

H. GPM: Gallons per minute

H. GPM: Gallons per minute

I. IPS: Iron pipe size

I. IPS: Iron pipe size

A. All current International Building Code, state, local, federal, and VA codes, standards, regulations, and ADA requirements shall pertain to this project. These may include but not limited to, architectural, structural, mechanical, electrical, fire ...

A. All current International Building Code, state, local, federal, and VA codes, standards, regulations, and ADA requirements shall pertain to this project. These may include but not limited to, architectural, structural, mechanical, electrical, fire ...

A. The publications listed below form a part of this specification to the extent referenced. The publications are referenced in the text by the basic designation only.

A. The publications listed below form a part of this specification to the extent referenced. The publications are referenced in the text by the basic designation only.

B. American Society Of Mechanical Engineers (ASME):

B. American Society Of Mechanical Engineers (ASME):

B16.18-2012 Cast Copper Alloy Solder Joint Pressure Fittings

B16.18-2012 Cast Copper Alloy Solder Joint Pressure Fittings

B16.22-2012 Wrought Copper and Copper Alloy Solder Joint Pressure Fittings

B16.22-2012 Wrought Copper and Copper Alloy Solder Joint Pressure Fittings

B16.24-2011 Cast Copper Alloy Pipe Flanges and Flanged Fittings: Classes 150, 300, 600, 900, 1500 and 2500

B16.24-2011 Cast Copper Alloy Pipe Flanges and Flanged Fittings: Classes 150, 300, 600, 900, 1500 and 2500

B18.2.1-2012 Square, Hex, Heavy Hex, and Askew Head Bolts and Hex, Heavy Hex, Hex Flange, Lobed Head, and Lag Screws (Inch Series)

B18.2.1-2012 Square, Hex, Heavy Hex, and Askew Head Bolts and Hex, Heavy Hex, Hex Flange, Lobed Head, and Lag Screws (Inch Series)

B40.100-2005 Pressure Gauges and Gauge Attachments

B40.100-2005 Pressure Gauges and Gauge Attachments

C. American Society Of Sanitary Engineering (ASSE):

C. American Society Of Sanitary Engineering (ASSE):

1013-2011 Reduced Pressure Principle Backflow Preventers and Reduced Pressure Principle Fire Protection Backflow Preventers

1013-2011 Reduced Pressure Principle Backflow Preventers and Reduced Pressure Principle Fire Protection Backflow Preventers

D. American Society For Testing And Materials (ASTM):

D. American Society For Testing And Materials (ASTM):

A536-84 (R2009) Ductile Iron Castings

A536-84 (R2009) Ductile Iron Castings

B32-08 Solder Metal

B32-08 Solder Metal

B61-08 Steam or Valve Bronze Castings

B61-08 Steam or Valve Bronze Castings

B62-09 Composition Bronze or Ounce Metal Castings

B62-09 Composition Bronze or Ounce Metal Castings

B62-09 Composition Bronze or Ounce Metal Castings

B88/B88M-09 Seamless Copper Water Tube

B88/B88M-09 Seamless Copper Water Tube

B813-10 Liquid and Paste Fluxes for Soldering of Copper and Copper Alloy Tube

B813-10 Liquid and Paste Fluxes for Soldering of Copper and Copper Alloy Tube

D1785-12 Poly(Vinyl Chloride) (PVC) Plastic Pipe, Schedule 40, 80, and 120

D1785-12 Poly(Vinyl Chloride) (PVC) Plastic Pipe, Schedule 40, 80, and 120

D2241-09 Poly(Vinyl Chloride) (PVC) Pressure Rated Pipe (SDR Series)

D2241-09 Poly(Vinyl Chloride) (PVC) Pressure Rated Pipe (SDR Series)

D2464-13 Threaded Poly (Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 80

D2464-13 Threaded Poly (Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 80

D2466-06 Poly(Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 40

D2466-06 Poly(Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 40

D2467-13 Poly(Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 80

D2467-13 Poly(Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 80

D2564-12 Solvent Cements for Poly (Vinyl Chloride) (PVC) Plastic Piping Systems

D2564-12 Solvent Cements for Poly (Vinyl Chloride) (PVC) Plastic Piping Systems

D2609-02(2008) Plastic Insert Fittings for Polyethylene (PE) Plastic Pipe

D2609-02(2008) Plastic Insert Fittings for Polyethylene (PE) Plastic Pipe

D2683-10 Socket-Type Polyethylene Fittings for Outside Diameter-Controlled Polyethylene Pipe and Tubing

D2683-10 Socket-Type Polyethylene Fittings for Outside Diameter-Controlled Polyethylene Pipe and Tubing

D2855-96(2010) Making Solvent Cemented Joints with Poly (Vinyl Chloride) (PVC) Pipe and Fittings

D2855-96(2010) Making Solvent Cemented Joints with Poly (Vinyl Chloride) (PVC) Pipe and Fittings

D3261-12 Butt Heat Fusion Polyethylene (PE) Plastic Fittings for Polyethylene (PE) Plastic Pipe and Tubing

D3261-12 Butt Heat Fusion Polyethylene (PE) Plastic Fittings for Polyethylene (PE) Plastic Pipe and Tubing

F477-10 Elastomeric Seals (Gaskets) for Joining Plastic Pipe

F477-10 Elastomeric Seals (Gaskets) for Joining Plastic Pipe

F656-10 Primers for Use in Solvent Cement Joints of Poly(Vinyl Chloride) (PVC) Plastic Pipe and Fittings

F656-10 Primers for Use in Solvent Cement Joints of Poly(Vinyl Chloride) (PVC) Plastic Pipe and Fittings

F771-99(2005) Polyethylene (PE) Thermoplastic High-Pressure Irrigation Pipeline Systems

F771-99(2005) Polyethylene (PE) Thermoplastic High-Pressure Irrigation Pipeline Systems

E. American Water Works Association (AWWA):

E. American Water Works Association (AWWA):

C500-09 Metal-Seated Gate Valve for Water Supply Service

C500-09 Metal-Seated Gate Valve for Water Supply Service

C500-09 Metal-Seated Gate Valve for Water Supply Service

C504-10 Rubber-Seated Butterfly Valves

C504-10 Rubber-Seated Butterfly Valves

C906-07 Polyethylene (PE) Pressure Pipe and Fittings, 4 in. through 63 in., for Water Distribution and Transmission

C906-07 Polyethylene (PE) Pressure Pipe and Fittings, 4 in. through 63 in., for Water Distribution and Transmission

F. American Welding Society (AWS):

F. American Welding Society (AWS):

A5.8/A5.8M:2011 Filler Metals for Brazing and Braze Welding

A5.8/A5.8M:2011 Filler Metals for Brazing and Braze Welding

G. Manufacturers Standardization Society (MSS):

G. Manufacturers Standardization Society (MSS):

SP-70-2011 Gray Iron Gate Valves, Flanged and Thread Ends

SP-70-2011 Gray Iron Gate Valves, Flanged and Thread Ends

A. General…