7-03 - Specifications.pdf

North Overton TIF Irrigation Improvements

Pland Collaborative 32 84 00 LANDSCAPE IRRIGATION SYSTEM

SECTION 32 84 00

LANDSCAPE IRRIGATION SYSTEM

PART 1 - GENERAL

1.1 DESCRIPTION OF WORK

A. The work consists of reworking underground irrigation systems as shown on the Drawings and as specified hereafter. The Contractor shall furnish all labor, equipment, materials and permits necessary for the completion of the system, unless otherwise specified as to be furnished by others. Unless otherwise specified or indicated on the Drawings, the construction of the irrigation system shall include the furnishing, installing, and testing of all pipe, fittings, valves, heads, controllers, wires, air release and vacuum valves, backflow preventers, inlet and discharge piping, automatic drain valves, manual drain valves, valve boxes, water meters and all other components pertinent to the system. The Contractor shall perform all trenching, excavating, boring, backfilling, compacting, concrete work, electrical work, welding, and any other work necessary for the completion of the irrigation system.

1.2 SITE INVESTIGATION

A. The Contractor shall examine related work and surfaces before starting the work of this section. The Contractor shall report to the Owner’s Representative, in writing, conditions which will prevent the proper execution of irrigation installation. Deviations from Drawings and Specifications shall be executed only with the express permission of the Owner’s

Representative and at no cost to the Owner. If obvious inadequacies or inappropriate design are found on the Drawings, they shall be promptly brought to the attention of the Owner’s

Representative in writing before proceeding with installation of the system.

1.3 CODES, RULES AND SAFETY ORDERS

A. All work and materials shall be in full accordance with the latest local rules and regulations of safety.

1.4 PROTECTION

A. The Contractor shall furnish and maintain all warning signs, shoring, barricades, red lanterns, and other protection devices, as required by the Safety Orders of the Division of Industrial

Safety and local ordinances.

1.5 DEVIATIONS OF LAYOUT

A. Reasonable changes in the location of piping, valves or other irrigation components shown on the Drawings will be considered prior to installation. Deviations from specified locations must be approved by the Owner’s Representative prior to installation. Any changes in location of irrigation components shall be effected at no cost to the Owner.

1.6 COORDINATION

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Pland Collaborative 32 84 00 LANDSCAPE IRRIGATION SYSTEM

A. The Contractor shall coordinate and cooperate with other contractors on site to ensure rapid and efficient completion of all contracted work.

1.7 SUBMITTALS

A. The Contractor shall prepare and make five sets of submittals providing manufacturer’s specifications and “cut sheets” on the following components:

Manual and automatic valves Heads and emitters Enclosures

Backflow preventer Valve boxes Drains

24 Volt wire Wire splicing materials Controller

Piping and tubing PVC fittings Filters

Joint materials Detectable line marking tape Pinch clamps

PVC primer and cement Threaded joint sealant or tape Drip end caps

B. Each set of submittals shall be bound or provided electronically in PDF format, and shall be clearly labeled with the project name and date.

C. The Contractor shall not proceed with the irrigation system work until receiving approval of the irrigation submittals from the Owner’s Representative.

1.8 RECORD DRAWINGS

A. The Contractor shall provide and keep up to date a complete set of “Record Drawings” which shall be corrected daily to show all changes in the location of heads, controllers, backflow preventers, valves, drains, meters, points of connection, pull boxes and wire splice boxes, pipe and wire routing and other changes that may have been made from the original Drawings and

Specifications. All gate valves, manual drains, wire splice and automatic and manual valve locations shall be shown with actual measurements to reference points so they may be easily located in the field.

B. At the time of final acceptance, the Contractor shall furnish one electronic copy (on

Flashdrive) and one paper copy of “Record Drawings” prepared by a qualified draftsperson in

AutoCAD format, showing the entire completed system as actually installed. This is the responsibility of the Contractor and shall not be construed to be the responsibility of any other party. This drawing shall be accurate and to scale. The symbols for valves, heads, and piping and other components shall be the same as originally shown on the Drawings. The legend shall be modified to designate any “record” changes. This “Record Drawing” shall be drawn on a project base sheet provided by the Owner’s Representative. The final drawings shall be dated and clearly labeled “RECORD DRAWING”.

1.9 CONTROLLER CHART

A. The Contractor shall provide two controller charts for each controller. Chart shall show the area covered by each automatic valve station on the controller with a different color used to show the area of coverage for each valve. Chart shall be a reduced drawing of the actual

“Record Drawing” system. The size of the chart shall be the maximum size that the controller door will allow. If controller sequence is not legible when the drawing is reduced, drawing

Pland Collaborative 32 84 00 LANDSCAPE IRRIGATION SYSTEM shall be enlarged to a size that is readable.

B. When completed and approved, chart shall be hermetically sealed between two pieces of plastic, each piece being minimum 20 mils thick. Chart shall be completed and approved prior to final observation and acceptance of the irrigation system. Contractor shall install one chart in each controller enclosure and shall provide one chart for each controller to the Owner’s

Representative. When charts are given to the Owner’s Representative they shall be labeled and identified by the controller address that is stated on the plan.

PART 2 - PRODUCTS

2.1 MATERIALS

A. All materials shall be new and without flaws or defects of any type and shall be the best of their class and kind. All materials shall have a minimum warranty of one year against material defects or defective workmanship.

B. All material shall be the brands and types noted on the Drawings or as specified herein, or approved equal.

C. The irrigation system was designed around equipment manufactured by specific companies as a standard. Approved equal equipment by other manufacturers may be used only with the approval of the Owner’s Representative. Request for approval of non-specified materials shall be submitted to the Owner’s Representative a minimum of seven (7) days prior to the opening of bids. Submission of irrigation sprinkler heads for approval as equal shall only be considered if submitted heads match the precipitation rate, gallons per minute, and spacing of specified sprinkler heads.

D. Irrigation components designated for use with recycled water shall be marked in accordance with the Uniform Plumbing Code.

2.2 COPPER TUBE AND FITTINGS

A. Hard Copper Tube: ASTM B 88M, Type B, water tube, drawn temper.

1. Copper Fittings: ASME B16.18, cast-copper-alloy or ASME B16.22, wrought-copper, solder-joint pressure type. Furnish only wrought-copper fittings if indicated.

B. Bronze Flanges: ASME B16.24, Class 150, with solder-joint end. Furnish Class 300 flanges if required to match piping.

C. Copper Unions: MSS SP-123, cast-copper-alloy, hexagonal-stock body with ball-and-socket, metal-to-metal seating surfaces, and solder-joint or threaded ends.

2.3 PIPE AND FITTINGS

A. PVC Pipe: All mainline pipe, from the point of connection to the zone valve, with a diameter of two inches (2”) or less shall be Schedule 40 PVC and shall conform to ASTM D 1785;

Pland Collaborative 32 84 00 LANDSCAPE IRRIGATION SYSTEM mainline pipe with a diameter of two and one-half inches (2-1/2”) or greater shall be Class 200

“O” ring gasket pipe, SDR 21; lateral line piping downstream of the zone valves which is 2-1/2” in diameter and greater shall be Class 200 SDR 21 and shall conform to ASTM D 2241. Lateral line piping downstream of the zone valves which is two inches (2”) in diameter or less shall be

Schedule 40 PVC and shall conform to ASTM D 1785. All PVC pipe shall be continuously marked with identification of the manufacturer, type, class, and size, and shall be free of holes, foreign material, blisters, wrinkles, dents, or sunburn.

B. Polyethelyne Pipe: Shall be linear, low density polyethylene drip tubing with 50 PSI maximum operating pressure at 100 degrees F, compatible with all standard 3/4" (OD) tubing.

C. Fittings for PVC Pipe: Fittings on PVC lines shall be Schedule 40 PVC, Type 1, Cell Classification

12454 and shall comply with ASTM D 2466.

D. Fittings for Polyethylene Pipe: Fittings for polyethylene pipe shall be PVC barbed insert fittings, conforming to ASTM D 2609.

E. Clamps for Fittings on Polyethylene Pipe: Clamps for fittings on polyethylene pipe shall be

Keystone SAE Type ‘J’ stainless steel pinch clamps or equal.

F. Threaded Nipples: All threaded PVC nipples shall be Schedule 80 molded PVC pipe. All galvanized nipples shall be Schedule 40 galvanized steel pipe.

2.4 VALVES AND VALVE BOXES

A. Valves: Valves for use in electrically controlled automatic control systems shall be diaphragm actuated and hydraulically operated solenoid valves as specified on the Drawings.

B. Gate valves shall be as specified on the Drawings.

C. Valve Boxes: Valve boxes shall be as noted on the Drawings. Valve box colors shall be as follows:

1. Green: Turf areas (potable water)

2. Tan: Gravel mulch areas (potable water)

3. Purple: Reclaimed water

2.5 HEADS AND EMITTERS

A. Heads and emitters shall be as specified on the Drawings.

2.6 CONTROLLER

A. Controller shall be as specified on the Drawings.

2.7 BACKFLOW PREVENTER

A. The backflow prevention device shall be as specified on the Drawings.

Pland Collaborative 32 84 00 LANDSCAPE IRRIGATION SYSTEM

2.8 PRIMER, CEMENT, AND THREADED JOINT SEALANT

A. Primer shall conform to ASTM F 656 and meet NSF. Cement shall be low VOC, NSF approved, and meet ASTM D 2564. Cement and primer shall be IPS Weld-On depending on size and schedule of pipe and fittings as follows:

Schedule 40 PVC Pipe and Fittings up to 6” Dia.: P-68 Primer and 705 Cement

Schedule 80 PVC Pipe and Fittings up to 4” Dia.: P-70 Primer and 705 Cement

Schedule 80 PVC Pipe and Fittings larger than 4” Dia.: P-70 Primer and 711 Cement

B. All threaded connections between metal to metal, PVC to metal, and PVC to PVC shall be made using Spears Blue 75 thread sealant or Polytetrafluoroethylene (PTFE) thread seal tape.

PTFE thread seal tape shall comply with MIL-T-27730A Specifications shall have a minimum thickness of 3.5 mils and shall be 99% pure PTFE. Thread sealing compound shall not be used on threaded connections between sprinkler and nipple or bubbler and nipple. Thread sealant or PTFE tape shall be used in accordance with manufacturer’s installation instructions.

C. All “O” ring gasket and pipe spigot ends shall be lubricated using the lubricant recommended or supplied by the pipe manufacturer. If the pipe manufacturer does not provide a lubricant for the pipe, use IPS Weld-on EZ Flush pipe lubricant, NSF approved.

2.9 WIRE

A. Wire for the 120 volt wiring shall be solid copper (or stranded copper in larger wire sizes), underground feeder for direct burial and PVC insulated. Size of wire shall be #12 AWG.

B. Wire for the 24 volt wiring shall be solid copper wire, PVC insulated, UL approved underground feeder wire for direct burial in ground. Common wires shall be #12, white, except as noted on Drawings. The control wires shall be #14 of any color other than white unless otherwise indicated on Drawings. The wire shall be supplied in either 500’ or 2,500’ rolls.

C. Wire Splicing Materials: All wire splices shall be made water-tight using 3M DBR/Y direct bury splice kit connectors or approved equal.

D. Grounding wire, ground rods, and wire clamps for controllers shall be as specified by the controller manufacturer.

E. Control wires shall be marked with the associated valve number with E-Z Coder WDR or equal wire marking tape at each valve, at the controller and at wire splices.

2.10 DETECTABLE LINE MARKING TAPE

A. Detectable line marking tape for irrigation main and lateral lines shall be manufactured by T.A.

Christy Enterprises or approved equal and shall consist of a minimum 5.0 mil (0.0050”) overall thickness; five-ply composition; ultra high molecular weight; 100% virgin polyethylene; acid, alkaline, and corrosion resistant.

Pland Collaborative 32 84 00 LANDSCAPE IRRIGATION SYSTEM

B. The tape width shall be a minimum of 6”.

C. Elongation properties shall be in accordance with ASTM D882-80A and shall be less than 150% at break.

D. Tensile strength shall be in accordance with ASTM D882-80A and shall be not less than 7800 PSI.

E. The tape shall have a minimum 20 gauge (0.0020”) solid aluminum foil core, adhered to a 2.55 mil

(0.00255”) polyethylene backing.

F. Tape color and legend combination shall be in accordance with APWA requirements. For irrigation lines with potable water supply, the color shall be blue and the legend shall read

“CAUTION: IRRIGATION LINE BURIED BELOW”. For irrigation lines with non-potable water supply, the color shall be purple and the legend shall read “CAUTION: RECYCLED/RECLAIMED WATER LINE

BURIED BELOW”.

2.11 OTHER MISCELLANEOUS FITTINGS AND MATERIALS

A. All other miscellaneous fittings and materials shall be as specified on the Drawings.

PART 3 - EXECUTION

3.1 GENERAL

A. This section includes installation specifications for all items installed as a part of the irrigation system. Certain construction procedures or minor equipment installation procedures that are necessary for the proper installation of the system may have been omitted from these specifications. In any case, Contractor shall install all materials and equipment in a neat and workmanlike manner according to manufacturer's recommendations and specifications, local and state codes, as shown on the Drawings and as specified herein.

3.2 PRODUCT HANDLING

A. The Contractor shall be responsible for correct procedures in loading, unloading, staking, transporting and handling all materials to be used in the system. The Contractor shall avoid rough handling which could affect the useful life of equipment. Pipe shall be handled in accordance with the manufacturer's recommendations on loading, unloading and storage.

3.3 POINT OF CONNECTION

A. Existing water main line locations shown on the Drawings are schematic. It shall be the

Contractor’s responsibility to pot hole and field check to determine actual locations as an incidental requisite to the construction contract.

B. The proposed controller location indicated on the Drawings is approximate. Actual location of the controller shall be determined by Owner’s Representative in the field.

Pland Collaborative 32 84 00 LANDSCAPE IRRIGATION SYSTEM

C. Where connections to existing pipe or stub out is required, the Contractor shall make necessary adjustments should pipe or stub out not be located exactly as shown, at no additional cost to the Owner.

3.4 STATIC PRESSURE TEST

A. The design pressure of the irrigation system is shown on the Drawings. Prior to start of construction of the irrigation system, the Contractor shall, in the presence of the Owner’s

Representative, provide a gauged test of available static pressure at the point of connection.

In the event that the actual static pressure is less than the design static pressure, the

Contractor shall not proceed with the work until receiving written direction from the Owner’s

Representative.

3.5 EXCAVATION AND TRENCHING

A. The Contractor shall stake the location of each run of pipe and all sprinkler heads and valves prior to trenching. Each run of the system shall be approved by the Owner’s Representative prior to installation.

B. Excavation and trenching for pipe lines shall be a true and straight line with the trench banks as nearly vertical as practical. The width of the trenches shall not be greater than necessary to permit proper joining, tamping, backfilling, bedding or any other installation procedures that may be necessary. Trench widths shall be wide enough to provide a minimum horizontal and vertical separation of 4" between pipes in the same trench.

C. In areas where trees are present, trench lines shall be adjusted on the site to eliminate any damage to tree roots.

D. Trench depths shall be sufficient to provide the specified pipe cover as described elsewhere in these Specifications or as noted on the Drawings. In rocky areas the trench depth and width shall be increased as needed to provide for a minimum of 6"of pipe bedding at bottom and sides of pipe.

E. Depth of Bury: Cover over mainline and lateral piping shall be as noted on the Drawings.

3.6 PIPE AND FITTINGS INSTALLATION

A. Installation of PVC pipe and fittings shall be in accordance with ASTM D 2774, the manufacturer’s recommendations and the procedures described in these Specifications.

B. Installation of polyethylene pipe and fittings shall be in accordance with manufacturers’ specifications. The Contractor shall secure insert fittings to polyethylene pipe with pinch clamps in accordance with manufacturer’s specifications.

C. Caution shall be exercised by the Contractor in handling, loading, unloading, and storing of pipe and fittings. All PVC pipe shall be stored and transported in a vehicle with a bed long enough to allow the pipe to lie flat without subjecting it to undue bending or concentrated external load at any point. Pipe shall be protected from damage by exposure to sunlight. Any

Pland Collaborative 32 84 00 LANDSCAPE IRRIGATION SYSTEM section of pipe that has been dented or damaged or in any other way found to be defective, either before or after laying shall be replaced with sound pipe at no cost to the Owner.

D. Before installation, the inside of the pipe shall be cleaned of all dirt and foreign matter and shall be kept in a clean condition during and after laying of pipe. When work is not in progress, open ends of pipe and fittings shall be secured closed so that no trench water, earth or other foreign substances will enter the pipe or fittings. Where pipe ends are left for future expansion or connections, they shall be valved and capped as directed on the Drawings.

E. All pipe and fittings shall be assembled to permit the pipe or fittings to be jointed at the true parallel position of the fittings. Placement of pipe which cause excessive bending and stress on pipe and fittings will not be permitted. No excess piping or fittings shall be permitted in the installation of the system, as this may increase pressure loss or potential for blockage.

F. Before installing the pipe, all rocks over 1 inch diameter, rubbish and debris shall be removed from the trenches. If the adjacent soil is rocky, the trenches shall be bedded and filled with clean dirt or sand to provide a minimum of 6” clearance between the pipe and the native soil.

Material used for pipe bedding and trench filling shall be approved by the Owner’s

Representative. The full length of each section of the pipe shall rest solidly upon the pipe bed, with recesses excavated to accommodate bells, joints, and couplings.

G. Pipe shall not be laid in water or when trench or weather conditions are unsuitable for the work. Any water which may be encountered or may accumulate in the trenches or excavation shall be pumped out or otherwise removed as necessary to keep the bottom of the trench or excavation free and clear of water during the progress of the work. Pipe shall not be laid when the temperature is 32 degrees F or below.

H. PVC pipe will expand or contract at the rate of +/- 3/8” per 100’ per 10 degrees F change of temperature. Therefore, PVC pipe shall be installed in a manner to provide for expansion and contraction as recommended by the manufacturer.

I. The minimum horizontal and vertical clearance between lines in the same trench shall be 4".

J. After all piping, risers, valves, thrust blocks, etc., have been installed and partially backfilled as specified in other parts of these Specifications, the control valve shall be opened and a full head of water used to flush out the system. Caution shall be observed to provide for release of any entrapped air in the system. After the system is thoroughly flushed, risers shall be capped and the system pressure tested in accordance with the testing section of these

Specifications. At the conclusion of the pressure test, the heads shall be installed and the backfill operation completed.

3.7 SOLVENT WELDING PROCEDURE ON PVC PIPE

A. All solvent weld joints shall be made in accordance with the solvent manufacturer’s recommendations and ASTM D 2855.

B. PVC plastic pipe shall be squarely cut utilizing a miter box mounted hacksaw or PVC specialty saw with a blade of 18 or 24 teeth per inch.

Pland Collaborative 32 84 00 LANDSCAPE IRRIGATION SYSTEM

C. Interior and exterior burrs shall be removed and the exterior shall be beveled to produce a 10-

15 degree bevel.

D. Thoroughly clean the mating pipe end and the fitting socket with a clean, dry cloth.

E. Using a properly sized applicator (approximately ½ the diameter of the pipe), apply a light coating of primer to the inside of the fitting socket, then apply a thin coat to the outside of the pipe end.

Apply a second, light coat of primer to the inside of the fitting socket taking care to avoid puddling of primer in fitting.

F. Apply a uniform coat of cement to the outside of the pipe end with a properly sized applicator

(approximately ½ the diameter of the pipe).

G. In like manner, apply a thin coating of cement to the inside of the fitting socket.

H. Re-apply a light coat of cement to the outside of the pipe end and quickly insert it into the fitting to the full depth of the fitting socket, while rotating the pipe or fitting approximately ¼ turn to ensure even distribution of cement.

I. Hold in position for approximately 30 seconds.

J. Wipe off any excess solvent cement that forms as a bead around the outer shoulder.

K. Contractor shall not use an excessive amount of solvent cement that could cause burrs or obstructions to form on the inside of the pipe joint.

L. Solvent weld joints shall be allowed to cure for minimum 24 hours before pressure is applied to the system.

3.8 BACKFILLING

A. Upon completion of a particular section of the irrigation system, and after sufficient time has elapsed for the curing of solvent weld joints, partial backfilling shall begin, leaving all joints, risers and connections exposed for visual inspection during the hydrostatic testing. Only upon successful completion of the hydrostatic test shall the backfill operation be completed for any one particular section.

B. All backfill material shall be subject to approval by the Owner’s Representative. Backfill material shall be free from rock, large stones, brush, sod, frozen material or other unsuitable substances that may damage pipe or compromise compaction during the backfilling operations.

C. In the event that the material from the excavation or trenching is found to be unsuitable for use in backfill by the Owner’s Representative, it shall be removed from the site and properly disposed of by the Contractor at his own expense. The Contractor shall then, at no cost to the

Owner, arrange for, purchase, and furnish suitable backfill material consisting of earth, loam, sandy clay, sand or other approved materials free of large clods of earth or sharp stones and

Pland Collaborative 32 84 00 LANDSCAPE IRRIGATION SYSTEM capable of attaining the same relative density of the surrounding ground.

D. In rocky areas, the trench depth shall be 6” below the normal trench depth to allow for 6” of suitable backfill as padding for the pipe. In like manner, there shall be minimum 6” of suitable backfill on all sides of the pipe as padding against rock in the wall of the trench.

E. All mainline and PVC lateral piping shall have detectable line marking tape installed in the trench six (6”) inches above the pipe. After pipe is placed in trench and the first 6" layer of backfill is placed and compacted, the detectable marking tape shall be placed continuously in all trenches prior to completion of backfill operations.

F. Backfill shall be placed in horizontal layers not exceeding 6” in depth and shall be thoroughly tamped, or water compacted to near original density or so that no settling will result. Backfill shall be placed to the original ground level. If settlement of trenches occurs within one (1) year from date of completion, it shall be the Contractor's responsibility to refill trenches and re-seed, re-sod or re-install landscape mulch in the repaired areas.

3.9 SADDLE TAPS

A. No saddle taps shall be permitted unless approved by the Owner’s Representative.

3.10 THRUST BLOCKS

A. Concrete thrust blocks shall be provided where necessary to resist system pressure, including at all direction changes, size changes, valves and terminations or at any other points of the system that will result in an unbalanced thrust line for equipment 2-1/2” and larger and as indicated on the Drawings. Thrust blocks shall not obstruct the outlets of fittings which are intended for future connections. Thrust blocks shall be poured against undisturbed earth and in accordance with the Drawings.

3.11 SLEEVED CROSSING

A. Unless otherwise noted on the Drawings, all piping installed under sidewalks, roadways, parking lots, etc., shall be sleeved in a Class 200 PVC pipe two (2) sizes larger than the pipe to be sleeved. Wire shall be placed in a separate sleeve from that of the pipe crossing and shall be Class 200 PVC minimum 2” size, or larger as required to accommodate the quantity of wire to be sleeved. Ends of sleeves shall be sealed with duct tape after installation of wire or piping.

3.12 HEAD INSTALLATION

A. Heads shall be of the type and make specified and shall be installed as shown on the

Drawings. Heads shall be installed with a 4" space between the edge of the head and curbs, walks, walls, driveways, building walls, etc. Heads shall be installed in the vertical position and backfilled and compacted to 80% modified Proctor.

B. Head spacing shall not exceed the spacing shown on the Drawings and shall be in the location and configuration as shown on the Drawings. Contractor shall verify turf area dimension while

Pland Collaborative 32 84 00 LANDSCAPE IRRIGATION SYSTEM staking head location. Heads shall be spaced to achieve uniform coverage.

C. After all piping and risers are in place and connected and before installation of the heads, all control valves for a given section shall be fully opened and a full head of water shall be used to flush out the system. If water pressure without the heads installed is not sufficient to provide adequate water flow from end risers, the Contractor shall cap off enough heads closest to the water source to provide adequate flushing of the end riser assemblies.

3.13 CONTROLLER INSTALLATION

A. The controller location is indicated on the Drawings. The Contractor shall familiarize himself with the requirements of making the power connections at the locations noted (120 volt supply to the controller) and shall include in his price for the irrigation system, the cost to complete this portion of the work.

B. The controller shall be mounted and wired according to the manufacturer's recommended procedures and as specified herein and on the Drawings.

C. Unless otherwise indicated in the Drawings, the Contractor shall direct-wire the 120 volt power supply to the controller.

D. Remote control valves shall be connected to controller in the numerical sequences as shown on the Drawings or as directed by the Owner’s Representative.

E. Controllers shall be grounded as specified by the manufacturer and as indicated on the

Drawings.

3.14 AUTOMATIC CONTROL VALVE INSTALLATION

A. Automatic control valves shall be of the type and size indicated on the Drawings. Installation shall be according to these Specifications, the Drawings, and the manufacturer's recommendations.

B. The valve boxes shall be of the size and type as shown on the Drawings.

C. Valve wire splices shall be waterproofed using 3M DBR/Y direct bury splice kit connectors or approved equal. The Contractor shall provide a 36" wire expansion coil to facilitate raising splices to ground level without cutting wires.

3.15 24 VOLT CONTROL VALVE WIRING

A. Wire installation procedures shall conform to local codes.

B. The Contractor shall install the 24 volt control valve wiring in the same trench as the irrigation mainline. Only when it is not possible for the wires to be installed in the mainline trench, they shall be installed in the lateral pipe trench. All wires shall be laid below the pipe. In no case shall the wire be laid on top of the pipe. The wires shall be laid loose in the trench and taped together at 10'-0" intervals. When trenches used for piping are not appropriate for routing

Pland Collaborative 32 84 00 LANDSCAPE IRRIGATION SYSTEM wire, Contractor shall install wire in a separate trench at 18" bury depth.

C. Wire splices, other than at valve box locations, shall be kept to a minimum and if needed shall be made only at common splice points and placed in a wire splice box. Wire splices shall be waterproofed using 3M DBR/Y direct bury splice kit connectors or approved equal.

D. At control wire splices, the Contractor shall provide a 36" wire expansion coil to facilitate raising splices to ground level without cutting wires.

E. Continual wire shall be one color and in no case shall wires of different colors be spliced together.

F. All 24 volt wiring shall be installed in PVC conduit when inside a building. All 24 volt wiring installed on exterior building walls shall be installed in metal conduit.

3.16 120 VOLT CONTROLLER POWER WIRING

A. The Contractor shall familiarize himself with the work required to complete this portion of the installation. All 120 volt wiring shall be installed in accordance with local electrical codes. The

120 volt service shall consist of one (1) black and one (1) white wire. The neutral wire shall be bonded.

B. The 120 volt power shall be supplied to the controller location and the backflow preventer location by a licensed electrician.

3.17 TESTING

A. Upon completion of the irrigation system's mainline, the entire mainline shall be tested with the Owner’s Representative present, for a one hour period at 100 psi, unless otherwise noted.

Prior to testing, the mainline shall be partially backfilled, leaving all joints and connections exposed for visual inspection. All dirt shall be flushed from the system and the line filled with water to remove air. The mainline shall be brought to static pressure. A pressure gauge and temporary valve shall be installed at the end of the mainline to permit air pressure to be applied to the main. A pressure of 100 psi shall be retained for a one hour period. Any leaks occurring during the one hour pressure test shall be repaired and the system retested until the system passes the test.

B. Upon completion of the PVC lateral piping sections, each lateral system shall be pressure tested, with the Owner’s Representative present for one hour at 100 psi. On systems using flex nipples or swing joints, the lateral system shall be tested prior to installation of the flex nipples or swing joints. Prior to testing, the lateral lines shall be partially backfilled leaving all joints and connections exposed for visual inspection. All air and dirt shall be flushed from the system and all open fittings shall be capped. The testing procedure shall be the same as used for the main line. Any leaks occurring during the hydrostatic test shall be repaired and the system retested until the system passes the test. If after one hour 100 psi pressure has been retained, the heads shall be installed, and the backfill operation completed.

C. The Contractor shall be responsible for payment of construction observations for retesting of

Pland Collaborative 32 84 00 LANDSCAPE IRRIGATION SYSTEM any lines or system components that fail initial pressure or performance test. Costs shall include the time of the observer at the observer’s standard rate, travel time and travel expenses.

3.18 ADJUSTING OF SYSTEM

A. After completion of testing and installation, the Contractor shall adjust all valves for the proper operating pressure and adjust all heads for uniform coverage and even flow.

Contractor shall wire the controller to have station numbers correspond with valve numbers indicated on the Drawings or as directed by the Owner’s Representative. The valve number shall be indicated on the controller panel for each station. Contractor shall program the controller to provide optimum system performance.

3.19 CLEAN UP

A. The Contractor shall continuously keep a neat and orderly area in which he is installing the system. Disposal of rubbish and waste material resulting from the installation shall be continual. Upon completion of the system, the Contractor shall remove from the Owner's property at his own expense, all temporary structures, rubbish, waste material, tools and equipment resulting from or used in the installation of the system.

3.20 PROTECTION OF EXISTING UTILITIES

A. The Contractor shall be responsible for locating all existing cables, conduits, piping, and any other utilities or structures that may be encountered either above or below ground. All necessary precautions shall be taken by the Contractor to prevent any damage to the existing utilities and improvements. In the event that such damage should occur from his operations, the Contractor shall repair or replace damaged utilities to their original condition at no expense to the Owner.

3.21 ROCK

A. If the Contractor encounters rock or other unfavorable trenching conditions, no additional compensation will be paid. When material from the excavation or trenching is unsuitable for use as backfill, additional backfill material suitable for this purpose shall be brought in at the expense of the Contractor. It shall be the Contractor's responsibility to remove and dispose of all unsuitable materials removed from the trench that cannot be used in the backfill operation.

3.22 FINAL ACCEPTANCE

A. When the Contractor is satisfied that the system is operating properly, that it is balanced and adjusted and that all work and clean-up is completed, he shall issue a notice of completion to the Owner’s Representative requesting a final observation. The Owner’s Representative will respond to the notice of completion and shall appear with the Owner for an observation of the project. At that time the Contractor shall demonstrate the operation of each system in its entirety. In reviewing the work, no allowance for deviation from the original Drawings and

Specifications will be made unless prior approval has been obtained.

Pland Collaborative 32 84 00 LANDSCAPE IRRIGATION SYSTEM

B. Any inconsistency to the Specifications or the Drawings will be noted by the Owner’s

Representative and a written copy of required corrections shall be given to the Contractor.

The Contractor shall complete all corrections in a timely manner and then shall issue a request to the Owner’s Representative for an inspection of corrected work. Final acceptance will not occur until correction of all items are complete.

3.23 OPERATIONAL INSTRUCTION

A. After the system has been tested and accepted, the Contractor shall instruct the Owner’s

Representative on the operation and maintenance of the system.

B. The Contractor shall provide the Owner with two (2) keys for each of the following:

1. manual gate valves

2. manual drain valves

3. valve boxes

4. controller enclosure

5. backflow preventer enclosure

6. any locking assembly in need of key access

C. The Contractor shall provide the Owner with two copies of a Maintenance Manual bound in a three ring binder. The maintenance manual shall include copies of the approved submittals, operation manuals and manufacturer’s warranties on all irrigation products.

3.24 SYSTEM MAINTENANCE AND GUARANTEE

A. Maintenance of the irrigation system shall begin immediately following the installation of the system and shall continue until the entire project is accepted. Maintenance shall include repair of defects or damages, adjustments and fine tuning of the system, and repairs of damages resulting from vandalism, erosion, weather, and the like.

B. For a period of one (1) year from final acceptance of the entire project, the Contractor shall promptly furnish and install, without cost to Owner, any and all parts or materials which prove defective in material or workmanship. Damage to the landscape or other property due to irrigation system line breaks shall be repaired and brought to original condition by the

Contractor at no expense to the Owner.

C. In the fall, at the Owner's request, the Contractor shall drain the system, and otherwise prepare the system for winter. In the spring, at the Owner's request, the Contractor shall reactivate the system, repair any defects or damage and adjust the system. As these services are performed, the Contractor shall instruct the Owner.

D. For a period of one (1) year from final acceptance of the system, the Contractor shall repair any settlement of trenches by one of the following methods as directed by the Owner’s

Representative.

1. Turf areas: Bring to grade by top-dressing (raking topsoil into the grass).

Pland Collaborative 32 84 00 LANDSCAPE IRRIGATION SYSTEM

2. Turf areas: Bring to grade with planting soil mixture and install seed mix to match existing turf.

3. Sod areas or tree/shrub planting areas: Remove existing sod or mulch. Fill depression with planting soil mixture, and replace with new sod or mulch to match existing.

4. Repair by any of the above methods shall result in a smooth, level area.

3.25 OBSERVATIONS

A. The following observations shall be the minimum required observations during the course of construction. Additional observations shall be made at any time at the discretion of the

Owner’s Representative. It shall be the responsibility of the Contractor to notify the Owner’s

Representative, in writing, 48 hours in advance of each required observation. The sequence of required observations shall not be changed from the sequence listed below. The

Contractor shall not proceed with work of the next sequence without written approval of the work of the previous sequence. The Contractor shall attach a copy of the written observation approvals to all applications for payment.

1. Observe staked locations of mainline, valves, laterals and heads.

2. Observe installation and pressure test of mainline.

3. Observe 24 volt control wire installation and ensure that existing controller operates all valve zones properly.

4. Observe installation and pressure test of automatic valves and lateral lines prior to installation of flex nipples, heads and emitters.

5. Observe head and emitter placement, coverage and operating pressure prior to planting.

6. Observe at final project review.

7. Observe 11 months after final project acceptance.

END OF SECTION