ft_mc_irrgation specification_final.pdf

Repair Parade Grounds Irrigation System

Ft. MacArthur HHEK-081036

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SECTION 02810

IRRIGATION SYSTEM

PART 1 - GENERAL

1.01 RELATED DOCUMENTS

A. General Conditions and Supplementary Conditions apply to this section.

1.02 WORK INCLUDED

A. Supply material, pipe, pipe fittings, automatic valves, wiring, control system and labor to install a fully automatic sprinkler system. Restore any existing landscaping disturbed during the installation.

B. Schedule construction so that no more then one half of the irrigation system is out of service at any one time. If an area currently served by the existing system will be without service for more then two weeks, provide a temporary water system to allow irrigation at a rate of at least ½” per week with uniformly distributed watering.

C. Restoration of surfaces to pre-construction conditions.

1.03 QUALITY ASSURANCE & REQUIREMENTS

A. Obtain and pay for any and all permits and inspections as required.

B. Follow manufacturer's directions and detailed drawings in all cases when the manufacturers of products used in this contract furnish directions covering points not included in the drawings and specifications.

C. All local, municipal and state laws, and rules and regulations governing or relating to any portion of this work are hereby incorporated into and made a part of these specifications, and their provisions shall be carried out by the Contractor. Anything contained in these specifications shall not be construed as conflicting with any such rules and regulations, or the requirements of the same. However, when these specifications and drawings call for or describe materials, workmanship, or construction of a better quality, higher standard, or larger size than is required by such rules and regulations, the provisions of these specifications and drawings shall take precedence.

D. Superintendent:

1. A superintendent satisfactory to the Contracting Officer shall be present on the site at all times during progress of the work.

2. Do not change the Superintendent except with the consent of the Contracting Officer.

3. The Superintendent shall be authorized to represent the Contractor.

4. Contractor to layout and stake irrigation system per irrigation design.

E. Explanation of Drawings:

1. Due to the scale of drawings, it is not possible to indicate all offsets, fittings, sleeves, etc., which may be required. Carefully investigate the structural and finish conditions affecting this work and plan work accordingly, furnishing such offsets, fittings, sleeves, etc., as may be required to meet site conditions. Drawings are generally diagrammatic and indicative of the work to be installed. Install the work in such a manner as to avoid conflicts between irrigation systems, planting and rural features.

2. The word Contracting Officer as used herein refers to the Owner's authorized representative.

3. Furnish and install all work called for on the drawings by notes or details whether or not specifically mentioned in the specifications.

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4. Do not install the irrigation system as shown on the drawings when it is obvious in the field that obstructions, grade differences or discrepancies in area dimensions exist that might not have been considered in engineering. Bring such obstructions or differences to the attention of the Contracting Officer. Failure to do so will mean the Contractor is responsible for any revisions necessary.

5. Do not purchase or install materials as noted in legend on drawing when it is obvious there is an oversight or discrepancy. Failure to obtain prior material approval may result in rejection by the Contracting Officer. The Contractor will be responsible for any revisions necessary due to his failure to bring material discrepancies to the attention of Contracting Officer, or failure to comply with material submittals.

6. Coordinate as necessary the work of this Section which is allied with the work of other trades.

7. It is the intent of the drawings and specifications to describe a complete irrigation system providing uniform water coverage. If the plans or specifications appear in any way to be incomplete, misleading, conflicting, or subject to misinterpretation, it is the Contractor's responsibility to bring these concerns to the Contracting Officer's attention before bidding. If the Contractor fails to do so, the Contractor must accept the Contracting Officer's interpretation and any potential related financial impact that may occur.

F. Electrical wiring, controls, and devices shall be Underwriters Laboratories listed, and labeled U.L.

G. DEFINITIONS

Compaction: The process of mechanically stabilizing a material by increasing its density at a controlled moisture condition. Compaction in this section is based on the Standard

Proctor density, which is the maximum dry unit weight of soil compacted at optimum moisture content as obtained by laboratory test in accordance with ASTM D 698. The specified compaction is at least 90% of maximum Proctor density at a moisture content within 2% dry of optimum to 1% wet of optimum).

1.04 SUBMITTALS

A. Material List:

1. Furnish the articles, equipment, materials, or processes specified by name in the drawings and specifications. Substitution is allowed only with prior written approval of the Contracting Officer.

2. Submit complete material list prior to performing any work. Material list shall include the manufacturer name, model number and description of all proposed materials and equipment.

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

4. If equipment proposed for use is as specified, a material list ONLY is required, and it is UNNECESSARY to submit manufacturer descriptive catalogs with submittal.

B. Documentation describing the moisture-density relationships of the material for construction.

Documents shall be in the form of a standard Proctor density curve (ASTM D698) developed by an independent licensed soils laboratory.

C. Record Drawings:

1. Provide and maintain up to date and complete project record documents (set of full size digital prints). Update daily and show all changes from the original drawings and specifications, as well as exact "as-built" locations, and sizes and types of

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02810-3 equipment. Prints for this purpose may be acquired from the Contracting Officer.

Keep this set of drawings on site and use only for such recording.

2. These drawings shall also serve as work progress prints and shall be the basis for measurement and payment for work completed. Drawings must be available at all times for site reviews, in a location designated by the Contracting Officer. Should the record progress prints be unavailable for review or fail to be up to date at the time of any site reviews (refer to Section 3.02-B-3 - Observation Schedule), it will be assumed no work has been completed and the Contractor will be assessed the cost of that site visit at the current billing rate of the Contracting Officer. No other inspections will take place until payment of that assessment.

3. Make neat and legible notations daily on the record progress prints as the work proceeds, showing the work as actually installed. Should equipment location differ from plan, indicate the new location in a graphic manner, matching the original symbols in the irrigation legend.

4. Before the final site review, transfer all information from the record prints to computer-generated reproducible drawings (or other approved method), and submit these reproducible drawings along with related CAD disk to the Contracting Officer for approval prior to preparing controller chart.

5. Dimension the following locations from two permanent points of reference (building corners, sidewalks, road intersections, etc.):

a. Connection to existing water lines

b. Connection to existing electrical power supply

c. Gate valves

d. Remote control valves

e. Quick coupling valve

f. New location of existing automatic controllers

6. On or before the date of the final site review, deliver the updated and completed reproducible drawings to the Contracting Officer. Delivery of these drawings does not relieve the Contractor of responsibility for furnishing any required information that may have been omitted from the prints.

D. Controller Charts:

1. Record drawings must be approved by the Contracting Officer before controller charts are prepared.

2. Provide two controller charts for each existing controller.

3. The chart shall show the area controlled by the automatic controller and shall be the maximum size controller door will allow.

4. The chart shall be based on a record drawing, reduced to the maximum size that will fit inside controller housing (printed on two sides if required for graphic clarity).

5. The chart shall be a photocopy with colors to differentiate areas of coverage for each hydro-zone, using pastel or transparent colors.

6. When completed and approved, hermetically seal the chart between two pieces of plastic (thickness of each piece being minimum 10 mils).

7. These charts must be completed and approved prior to final acceptance of the irrigation system. Installation will not be accepted without charts.

E. Operation and Maintenance Manuals:

1. Prepare and deliver to the Contracting Officer within 10 calendar days prior to completion of construction two hardcover three ring binders containing the following information:

a. Index sheet stating Contractor's address and telephone number

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b. List of equipment with names, addresses, and telephone numbers of local manufacturer representative

c. Catalog and parts sheets regarding material and equipment installed under this contract

d. Warranty statement

e. Complete operating and maintenance instruction on all major equipment

2. In addition to these maintenance manuals, instruct Owner's maintenance personnel regarding operation of major equipment and show written evidence to the Contracting Officer at the conclusion of the project that this service has been rendered.

F. Tools to be Furnished:

1. Supply as part of this contract the following tools:

a. Two keys for opening valve boxes

b. One quick coupler key and matching hose swivel

c. One remote hand-held radio control unit per controller specified (transmitter and receiver) compatible with controller specified.

d. Two Rain Bird pressure gauges, RBG-L160-D

2. Turn over this equipment to the Owner at the conclusion of the project. Before final acceptance can occur, written evidence that the Owner has received materials must be shown to the Contracting Officer.

1.05 PRODUCT DELIVERY, STORAGE AND HANDLING

A. Exercise care in handling, loading, unloading, and storing PVC pipe and fittings.

Transport PVC pipe in a vehicle which allows the length of pipe to lie flat, to avoid undue bending or concentrated external load at any point. Any section of pipe dented or damaged must be discarded or, if installed, must be replaced with new piping.

B. Cover any pipe stored outdoors to protect it from sunlight.

1.06 SUBSTITUTIONS

A. To request substitution of any equipment or material in lieu of equipment or material listed on the irrigation drawings and in the specifications, provide the following information to the Contracting Officer for approval:

1. Statement indicating the reason for making the substitution, using a separate sheet of paper for each requested substitution

2. Descriptive catalog literature and performance charts (if available) for each requested substitution

3. Hydraulic calculations for proposed substitution, as applicable

4. Itemized list of proposed substitution(s), noting difference in material and labor costs between substitution and item originally specified

5. Written confirmation that Owner has received any credit resulting from approved substitution (with a copy sent to Contracting Officer) B. Approval of any substitution or alternate will be based on information and/or samples provided by the Contractor.

C. Responsibility for the total performance of any substitution to equal or surpass the item originally specified in every respect rests with the Contractor.

D. If the Contracting Officer determines the substitution has proven to be unsatisfactory, it shall be removed and replaced with the originally specified item as part of the work of this contract (both materials and labor).

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E. The Contracting Officer shall be solely responsible for accepting or rejecting any substitution as equal to equipment and materials listed on the irrigation drawings and in the specifications.

1.07 WARRANTY

A. Sprinkler irrigation system warranty shall be according to the following form.

B. Manufacturer warranties do not relieve the Contractor of his liability under the warranty.

Such warranties only supplement the warranty.

C. Include a copy of the warranty form in the Operations and Maintenance Manual.

D. The following warranty form shall be typed on Contractor's letterhead:

WARRANTY FOR SPRINKLER IRRIGATION SYSTEM

We hereby warranty that the sprinkler irrigation system we have furnished and installed is free from defects in materials and workmanship, and the work has been completed in accordance with the drawings and specifications, ordinary wear and tear, unusual abuse or neglect excepted. We agree to repair or replace any defects in material or workmanship which may develop during a period of one year from the date of project completion, and also to repair or replace any damage resulting from the repairing or replacing of such defects, at no additional cost to the Owner. We will perform such repairs or replacements within three days after receipt of written notice. In the event of our failure to perform such repairs or replacements within a reasonable time after receipt of written notice from Owner, we authorize the Owner to proceed to complete said repairs or replacements at our expense and we will pay the costs and charges therefore upon demand.

PROJECT:

CONTRACTOR:

ADDRESS:

PHONE NO.:

BY:

DATE OF ACCEPTANCE:

BY:

1.08 TEMPORARY REPAIRS

A. The Owner reserves the right to make temporary repairs as necessary to keep the sprinkler system equipment in operating condition. The exercise of this right by the Owner will not relieve the Contractor of responsibilities under the terms of the guarantee as herein specified.

PART 2 - PRODUCTS

2.01 MATERIALS

A. Use only new materials of manufacturer and type noted on drawings and as specified herein, or approved equal.

2.02 PIPE & FITTINGS

A. Pressurized main lines (buried) shall be PVC Schedule 80.

B. Non-pressure lines (buried) shall be PVC Schedule 40. (1/2 inch pipe is not permitted.)

C. All PVC pipe and fittings shall conform to following specific requirements:

1. PVC (Solvent Weld)

a. Pipe shall be manufactured from virgin polyvinyl chloride compound in accordance with ASTM D 1784, cell classification 12454 B, hydrostatic design stress rating not less than 2,000 PSI

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b. Fittings (solvent weld or thread) shall be standard weight, Schedule 80, side gated, injection molded PVC, complying with ASTM D 1784, cell classification

13454 B, including threads when required.

2. PVC nipples shall be Schedule 80, with molded threads.

3. All PVC pipe must bear the following markings:

a. Manufacturer name

b. Nominal pipe size

c. Schedule or class

d. Date of extrusion

4. Solvent cement and primer for PVC solvent-weld pipe and fittings shall be of type and installation method prescribed by the manufacturer.

D. Copper Pipe and Fittings (Provided Under Mechanical Section by the Plumbing

Contractor):

Pipe shall be Type L, hard tempered.

Fittings shall be wrought copper, solder joint type.

Joints shall be soldered with silver solder, 45 percent silver, 15 percent copper, 16 percent zinc, 24 percent cadmium, solidus at 1125 F. and liquidus at 1145 F.

2.03 ELECTRICAL (HIGH VOLTAGE)

A. Automatic controllers shall be reconnect to existing high voltage service.

B. Electrical equipment installed outside building shall be NEMA 4 type.

2.04 ELECTRICAL (LOW VOLTAGE)

A. Remote control wire shall be direct-burial AWG-UF type, size as indicated on the drawings, and in not case smaller than 14 gauge.

B. Connections shall be either epoxy-sealed packet type or Penn-Tite connectors.

C. Ground wires shall be white in color. Control wires shall be red (where two or more controllers are used, the control wires shall be a different color for each controller. These colors shall be noted on the “Record Drawings” plans located on controller door.

2.05 GATE VALVES

A. Valves 4 inches and smaller shall be ASTM B 62 brass body, 150 pound saturated steam rated with screwed joints, non-rising stem, screwed bonnet, and solid disc, unless otherwise noted on drawings. Provide with hand wheel.

B. A gate valve shall be installed at each remote control valve and quick coupler pressure supply line outlet (on structure, provided by the plumbing contractor). Coordinate installation of gate valves on site.

2.06 QUICK COUPLING VALVES

A. Valves shall be class 125 brass body, 150 pound class, with 1 inch female threads opening at base permitting operation with a special connecting device (coupler) designed for this purpose.

1. Coupler threads shall be lug type.

2. Provide with rubber-like vinyl hinge cover.

2.07 AUTOMATIC CONTROLLER

A. Utilize existing automatic controllers, relocate if necessary for new construction of pump system and mount in new location as directed by Contracting Officer. Remove existing control wires and replace with new control wires.

2.08 REMOTE CONTROL VALVES

A. Remote control valves shall be of the manufacturer, size and type indicated on the drawings.

B. Remote control valves shall be electrically operated.

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2.09 VALVE BOXES

A. Valve boxes shall be fabricated from a durable plastic material resistant to weather, sunlight and chemical action of soils, with black covers.

B. Remote control valves, shall be installed in rectangular plastic boxes, Ametek or approved equal, with bolt down hinged covers.

C. Quick coupling valves and flush-out assemblies shall have 10 inch round plastic boxes with exterior as required to properly protect valve, Ametek or approved equal.

2.10 TREE IRRIGATORS/BUBBLER HEADS

A. Tree irrigation bubblers shall be of the manufacturer, size and type indicated on the drawings.

PART 3 - EXECUTION

3.01 SITE CONDITIONS

A. All scaled dimensions are approximate. Check and verify all dimensions per Contracting

Officer's approval prior to proceeding with work under this section.

B. Exercise extreme care in excavating and working near existing utilities. Coordinate excavations with underground service alert and utility companies. Damage to utilities caused by operations or neglect shall be repaired at Contractor’s expense. Check existing utility drawings for locations.

C. Coordinate installation of sprinkler irrigation materials, including pipe, so there will be NO interference with utilities or other construction, or difficulty in planting trees, shrubs, and ground covers.

D. Carefully check all grades to ensure work on the sprinkler irrigation system may safely commence.

3.02 PREPARATION

A. Water Supply:

1. Connect sprinkler irrigation system to water supply points of connection as indicated on the drawings. Verify exact location on site.

2. Connections as shown on drawings are approximate. Minor deviations (plus or minus 20 feet) required by actual site conditions shall be a part of this contract.

3. Coordinate connection to meters, water outlets, etc. with Contracting Officer and other trades on site to ensure proper connection.

4. Coordinate pipe crossing hardscapes, walks, etc., with appropriate trades to minimize disturbance to finish product. If a preferable route is noted on site, contact Contracting Officer to discuss alternative and obtain approval of same.

B. Observation Schedule:

1. Notify the Contracting Officer in advance for the following observation meetings, according to the time indicated:

a. Pre-job conference - 5 days

b. Automatic controller location - 48 hours

c. Pressure supply line and control wire installation and testing - 48 hours

d. Lateral line and sprinkler installation - 48 hours

e. Coverage test - 48 hours

f. Final site review - 5 days

2. When observations are conducted by other than the Contracting Officer, show evidence in writing when and by whom these observations were made.

3. Maintain a set of current and up to date plans on the job site at all times. No site observations will commence without record drawings and current plans. In the event the Contractor calls for a site visit without record drawings, without current plans, REVISED: 5/28/2009 IRRIGATION SYSTEM Ft. MacArthur, CA

02810-8 without completing previously noted corrections, or without preparing the system for said visit, he shall be responsible for reimbursing the Contracting Officer based on his current billing rates per hour (portal to portal, plus transportation costs) for the inconvenience. No subsequent site visits will be scheduled until this charge has been paid.

C. Physical Layout:

1. All piping or equipment shown diagrammatically on drawings outside planting areas shall be installed inside planting area whenever possible, to exact dimensions noted in construction details unless otherwise approved.

2. Prior to installation, Contractor will stake out the position of all devices.

3. Entire layout shall be approved by Contracting Officer prior to installation.

3.03 COMPACTION

A. Before establishing the compaction method required to achieve the specified soil compaction, Contractor shall arrange for an approved commercial testing laboratory to conduct the tests necessary to establish the optimum moisture and maximum standard Proctor compaction density for earthen materials. A minimum of 3 samples of soil, taken from widely spaced points in the parade grounds shall be analyzed.

B. COMPACTION METHOD. At the start of the project, Contractor shall establish the amount of effort required to obtain the specified compaction. A test trench of at least 20 feet in length will be excavated to the design depth. Piping will be installed and the backfilling process begun. As each of the 8-inch thick layers is compacted and completed, Contractor shall obtain compaction samples and analyze the samples. The method for obtaining the specified compaction shall be noted (equipment, number of passes, compaction effort). This process shall be carried out until the method consistently produces the level of compaction required. Selection of compaction equipment shall be that of the Contractor; however, the equipment shall be capable of achieving the compaction requirements with out excessively working the soil. Proof of obtaining these density parameters is the responsibility of the Contractor.

C. During construction, proof of specified compaction may be established by either one of the following methods:

1. Contractor shall consistently use the compaction effort (method) established as described above to obtain the compaction.

2. Alternatively, Contractor shall test in sufficient numbers to ensure that the specified density is being obtained throughout. Field in-place density shall be determined in accordance with

ASTM D 2167 (rubber balloon) or ASTM D 1556 (sand cone). Contractor shall immediately provide density and moisture information to the Engineer during construction, in a timely manner, to allow the Engineer to determine whether the compaction requirements are being met. The Engineer may independently check densities, using its own equipment. If so, the

Contractor shall not rely on the Engineer to provide density readings. Engineer's measurements are the measurements for compliance. Should an area fail to meet the requirements, the area will be re-excavated, reworked (including moisture adjustment) and recompacted at the Contractor's expense.

3.04 INSTALLATION

A. Piping:

1. Install all plastic pipe and fittings according to manufacturer instructions.

2. All lines shall have a minimum clearance of 6 inches from each other and from lines of other trades. Parallel lines shall not be installed directly over one another.

3. All major plumbing work using copper pipe shall be performed by a licensed and bonded Plumbing Contractor. Irrigation Contractor shall obtain all permits required.

B. Trenching:

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1. Excavate trenches to required depths. Follow approved layout for each system.

2. Trench bottom shall be flat to ensure piping is supported continuously at prepared grade.

3. Where lines occur under paved areas, consider dimension to be below the sub-grade.

4. Provide minimum coverage as follows:

a. Pressure supply lines (4 inches and smaller): 18 inches, unless otherwise noted on drawing.

b. Non-pressure lines: 12 inches, unless otherwise noted on drawing.

C. Tracer Wires:

1. Carefully place tracer wire on bottom of trench under vertical projection of pipe, avoiding stress from backfilling and running wire continuously throughout the length of pipe.

2. Tracer wire shall follow main line pipe and branch lines, terminating in a yard box with a gate valve that controls these main irrigation lines. Provide sufficient wire to reach surface grade, bending back end of wire to form a loop, and attach a Dymo- Tape type plastic label noting “TRACER WIRE.”

3. All splices shall be made using Scotch-lok or equal, encased in epoxy resin to provide a permanent U.L. approved watertight connection.

D. Backfilling:

1. Buried pipe in trenches shall be center loaded only until all required tests are performed. Carefully backfill trenches with approved excavated materials such as earth, loam, sandy clay, sand, or other approved materials free from large clods of earth or stones. Mechanically compact backfill in landscaped areas to a dry density equal to adjacent undisturbed soil in planting areas. Backfill must conform to adjacent grades without dips, depressions, humps or other surface irregularities.

2. Place fine granular material backfill on all lines initially. No foreign matter larger than 1/2 inch in size will be permitted in the initial backfill.

3. Flooding of trenches will not be permitted.

4. If settlement occurs and subsequent adjustments in pipe, valves, sprinkler heads, lawn, planting, etc. are necessary, make all such adjustments at no cost to the Owner.

E. Trenching and Backfill Under Paving:

1. Under areas where paving, asphaltic concrete, or concrete will be installed, embed the pipe in coarse sand. Pipe shall have 6 inches of sand below and 3 inches of sand above the pipe. Pipe vertical alignment shall be maintained through the paved area by overexcavating the depth of the trench to the extent necessary to accommodate the added volume of sand. Compact backfill in 8-inch thick layers to 95 percent maximum standard Proctor density.

2. Pressure test all piping under paving prior to the paving work.

3. Install piping under existing walks by boring or by hand excavation.

4. Where boring is used,

a. Install a casing pipe, tightly-fit to the bore hole. The fit should be tight enough that pipe jacking is required. Casing pipe shall be sized to allow installing the irrigation pipe without having to use force beyond just sliding the pipe(s) into the casing by hand. PVC casing shall be SCH 40 minimum thickness. Casing shall extend a minimum of 2 feet beyond each edge of pavement.

b. Install wires under paving in separate conduit of size that results in a maximum of

30% conduit fill.

c. Hydraulic driving requiring the use of jetted water will not be permitted.

5. Where hand excavation is the method for installation

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a. Sawcut through paving as necessary. Place and backfill pipe as described in 1 and 2 above, except the six inches of fill below the paving shall be a well graded road base material compacted to 95% maximum standard Proctor density.

b. Wires shall be installed in conduit. Conduit shall extend a minimum of 4 feet beyond the edge of pavement on each side.

c. Install new paving identical to the paving that was removed.

6. Coordinate installation of piping and sleeves under paved areas with Contracting

Officer.

F. Assemblies:

1. Routing of sprinkler irrigation lines as indicated on the drawings is diagrammatic.

Install lines and various assemblies to conform with details on plans.

2. Install NO multiple assemblies in plastic lines. Provide each assembly with its own outlet.

3. Perform all directional changes on pressure supply line using 45 degree elbows. No 90 degree elbows will be permitted without approval of Contracting Officer.

4. No more than one size may be used when reducing or increasing a fitting outlet, unless approved by Contracting Officer.

5. Install all assemblies specified herein in accordance with respective detail. In absence of detail drawings or specifications pertaining to specific items required to complete work, perform such work in accordance with best standard practice, with prior approval of the Contracting Officer.

6. Thoroughly clean PVC pipe and fittings of dirt, dust and moisture before installation.

Installation and solvent welding methods shall be as recommended by the pipe and fitting manufacturer.

7. On PVC to metal connections, work the metal connections first. Use Teflon tape or approved equal on all threaded PVC to PVC and on all threaded PVC to metal joints, with only light wrench pressure. Where threaded PVC connections are required, use threaded PVC adapters into which the pipe may be welded.

8. Verify exact location of all major equipment with the Contracting Officer before installation.

9. Install remote control valves in shrub areas and perpendicular to hardscape unless otherwise approved.

G. Automatic Controller:

1. Utilize (2) existing automatic controllers

H. Flushing of System:

1. After all new sprinkler pipe lines and risers are in place and connected, all necessary diversion work has been completed, and prior to installation of sprinkler heads, open the control valves and flush out the system using adequate pressure.

2. Install sprinkler heads only after the system has been flushed to the complete satisfaction of the Contracting Officer.

I. Sprinkler Heads:

1. Install the sprinkler heads per the drawings and according to their respective detail.

2. Spacing of heads shall not exceed 5 percent of width of planting area. Refer to plan, and bring any discrepancies to the attention of Contracting Officer.

J. Valve Boxes:

1. Install all buried valves and equipment in the specified box.

2. Fill area under box with a minimum of 3 cubic feet of 3/4 inch gravel for remote control valves and two cubic feet for gate valves and quick coupling valves, before box is installed.

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3. Attach identification tags to each remote control valve, showing number that corresponds with controller sequence. Tags shall be manufactured of polyurethane Behr Desopaid, yellow in color with black letters, 2-3/4 inches by 2-1/4 inches.

4. Brand sequence number of each valve in minimum 2 inch high numerals into box top.

5. Install valve boxes in shrub areas unless otherwise approved.

6. Install valve boxes square to one another and to edges of adjacent hardscape, unless otherwise approved by Contracting Officer.

K. Electrical Supply:

1. Place low voltage wiring in the same trench and along side of main lines unless otherwise approved.

2. When more than one wire is placed in a trench, tape wires together at maximum 12 feet on center.

3. Provide a 12 inch expansion loop at each connection and directional change for low voltage wires and two feet for stub outs.

4. Use a continuous wire between controller and remote control valves. Except as otherwise approved, do not splice wire at any point. Enclose all approved splices in an U.L. approved junction box.

5. Provide each controller with separate ground wire.

6. Provide pull box for low voltage wires approximately every 200 feet along continuous lineal runs.

3.05 FIELD QUALITY CONTROL

A. Adjustment of the System:

1. Adjust all sprinkler heads and valves for optimum performance, to minimize overspray onto walks and roadways. Spray on buildings, windows, Palm trees will not permitted.

2. If it is determined that adjustments in the irrigation equipment will provide proper or more adequate coverage, make such adjustments prior to planting. Adjustments may include changes in nozzle sizes or trajectory of spray or degrees of arc, as may be required. Use variable arc nozzles where required.

B. Testing of Irrigation System:

1. Test all pressure lines under hydrostatic pressure of 100 pounds per square inch or 50 pounds more than normal static pressure (whichever is greater), and prove watertight.

2. Testing of pressure main lines must occur prior to installation of electric control valves, quick couplers or any other equipment that might prevent a proper test from being performed.

3. Test all piping under paved areas under hydrostatic pressure of 100 pounds per square inch, and prove watertight prior to paving.

4. Sustain pressure in lines for minimum 4 hours, unless otherwise authorized. If leaks develop, replace joints and repeat test until entire system is proven watertight.

5. All hydrostatic tests shall be conducted only in the presence of the Contracting Officer or other duly authorized representative of the Owner. Do not completely backfill pipe until it has been inspected, tested and approved in writing.

6. Furnish necessary force pump and all other test equipment, if permanent connection is unavailable.

7. When the sprinkler irrigation system is completed, perform a coverage test in the presence of the Contracting Officer to confirm that water coverage for planting areas is complete and adequate. Furnish all materials and perform all work required to

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02810-12 correct any inadequacies of coverage due to deviations from plans, or where the system has been willfully installed as indicated on the drawings when it is obviously inadequate without notifying the Contracting Officer. This test shall be accomplished before any planting occurs.

8. Provide handheld walkie-talkie or personnel as necessary to accomplish this task expeditiously.

9. Upon completion of each phase of work, test and adjust entire system to meet site requirements.

10. Test any low voltage wiring more than 50 feet long installed under paving for continuity prior to paving.

C. Final Observation Prior to Acceptance:

1. Operate each system in its entirety for the Contracting Officer at time of final observation. Any items deemed unacceptable by the Contracting Officer due to noncompliance with the specifications and drawings shall be corrected to the complete satisfaction of the Contracting Officer.

2. Operate the following at conclusion of maintenance period to confirm proper performance:

a. Automatic controller

b. All spray systems

3. Evidence must be shown to the Contracting Officer that the Owner has received all required equipment, charts, record drawings, etc. before final observation can occur.

D. Conclusion of Maintenance Period:

1. At end of maintenance period, submit written confirmation to Contracting Officer that the system is operating properly, as per final acceptance, and note any changes/adjustments made during maintenance period. Based on this, Contracting Officer may request additional site review.

3.06 MAINTENANCE

A. The entire sprinkler irrigation system shall be operated automatically for a period of seven days.

B. The Contracting Officer reserves the right to waive or shorten the operation period.

C. After maintenance period, demonstrate in presence of the Contracting Officer that the system is in proper operating order.

3.07 CLEANUP

A. Perform cleanup as each portion of the work progresses. Remove refuse and excess dirt from the site, and sweep or wash down all walks and paving. Repair any damage to the work of others and return to original condition.

3.08 OPERATING INSTRUCTIONS

A. Train Owner's maintenance personnel in proper operation of all major equipment.

Provide written confirmation of the person(s) so trained to the Contracting Officer.

Contractor to video tape the training sessions and provide the session to the Contracting Officer on CD.

B. During maintenance period, establish infiltration rate of soil in all areas (particularly slopes). Schedule automatic controller to not exceed saturation point, and program repeat cycles as required to meet landscape needs while avoiding runoff. At conclusion of maintenance period, provide a typed record of the watering schedules for each valve during maintenance, including various schedules due to seasonal changes.

3.09 EXISTING LANDSCAPING

REVISED: 5/28/2009 IRRIGATION SYSTEM Ft. MacArthur, CA

02810-13

A. Protect all existing landscaping. Any existing landscaping removed or damaged shall be properly replaced, including sod, as directed by the Contracting Officer.

B. Verify that fencing has been provided around trees, located at the dripline (line of furthest branch of tree plus 3 feet). Notify Contracting Officer to review and approve final location of the proposed irrigation system layout and trenching in the vicinity of existing trees to be retained.

C. Do not excavate or install irrigation materials or equipment within the dripline of existing trees using mechanical trenching equipment. Do not permit sprinkler heads to spray onto trunks of existing trees and Palms. Use all possible care to avoid injury to trees and tree roots. Excavate by hand in areas where 2 inch and larger roots occur. Tunnel under all roots 2 inches and larger in diameter and heavily wrap with burlap, to prevent scarring or excessive drying.

D. Confirm trenching locations at existing trees with Contracting Officer to obtain approval prior to trenching. Where roots are encountered outside the dripline, hand trim the wall of the trench adjacent to the tree, making clean cuts through. Paint roots 1 inch and larger in diameter with two coats of Tree Seal, or equivalent. Close trenches adjacent to tree within 24 hours. Where this is not possible, shade the side of the trench adjacent to the tree with burlap or canvas.

E. Restore vegetation over backfilled trenches in grassed area by seeding with Marathon II at rate of 10 pounds per thousand square feet. Replace St. Augustine grass with sod or plugs as specified by sod growers.

3.10 SERVICES/DATA TO BE PROVIDED BY THE CONTRACTOR

A. Water schedules.

B. Training of Owner’s personnel in proper operation of all major equipment. This training shall be provided in one 8 hour session wherein the operation of the entire system, including electrical, controls, and pumps, will be presented as training items. Include at a minimum, a one hour session on pump maintenance.

C. Equipment to be supplied per Section 1.04 E.1.

END OF SECTION