R5 RO Landscape Spec 328400 Irrigation.pdf

Region 5 Regional Office Landscape Renewal

32 8400-1 Irrigation

SECTION 328400 IRRIGATION

1. SUMMARY

A. Irrigation system required for this work includes but is not limited to the furnishing of all labor, tools, materials, appliances, tests, permits, taxes, water and electric hookup fees, etc., necessary for the installation of a landscape irrigation system as herein specified and shown on the drawings, and the removal of all debris from the site.

1. Locate, purchase, deliver and install piping, conduit, sleeves, 120 volt and low voltage electrical and water connections, valves, backflow preventer devices, controllers, rain sensors, stationary moisture sensors, spray and bubbler heads, drip irrigation lines, and associated accessories and guidelines for a fully operational automatic underground irrigation system.

2. Removal of all existing irrigation piping, valves, valve boxes and controllers with proper offsite disposal of all materials and backfill emptied locations.

3. Material procurement should involve the BAA (Buy American Act).

4. Trenching and water settling of backfill material.

5. Testing and startup of the irrigation system.

6. Contractor will prepare and provide an as-built record set of drawings to government.

7. Follow Federal and State water resources guidelines.

8. Training of the government maintenance personnel in the operational requirements of the

Irrigation system.

9. Clean up and disposal of all excess and surplus materials.

10. Maintenance of the irrigation system during the proscribed maintenance and warranty period.

B. The system shall efficiently and evenly irrigate all areas and be complete in every respect and shall be left ready for operation to the satisfaction of the government.

C. Coordinate with other trades, as needed to complete work, including but not limited to Water Meter, Point of Connection (POC) and Backflow Preventer Device (BFPD) location and electrical hookups.

2. CONTRACT DOCUMENTS

A. Shall consist of specifications and its general conditions and the drawings. The intent of these documents is to include all labor, materials, water resource guidelines and services necessary for the proper execution of the work. The documents are to be considered as one. Whatever is called for by any part shall be as binding as if called for in all parts.

3. RELATED DOCUMENTS AND REFERENCES

A. Related Documents:

1. Drawings and general provisions of contract, including general and supplementary conditions and Division I specifications, apply to work of this section.

2. Related Specification Sections B. Sections - Planting References:

1. American Society of Testing Materials (ASTM): cited section numbers.

2. National Sanitation Foundation (NSF): rating system.

3. Irrigation Association: Turf & Landscape Irrigation Best Management Practices.

4. California Department of Water Resources (Irrigation Systems of 30psi).

4. VERIFICATION

A. Irrigation piping and related equipment are drawn diagrammatically. Scaled dimensions are approximate only. Before proceeding with work, carefully check and verify dimensions and immediately notify the Contracting Officer Representative (COR) of discrepancies between the drawings or specifications and the actual conditions. Although sizes and locations of plants and or irrigation equipment are drawn to scale wherever possible, it is not within the scope of the drawings to show all necessary offsets, obstructions, or site conditions. The Contractor shall be responsible to install the work in such a manner that it will be in conformance to site conditions, completed, and in good working order.

B. Piping and equipment are to be located within the designated planting areas wherever possible

32 8400-2 unless specifically defined or dimensioned otherwise.

5. PERMITS AND REGULATIONS

A. The Contractor shall obtain and pay for all permits related to this section of the work unless previously excluded under provision of the contract or general conditions. The Contractor shall comply with all laws and ordinances bearing on the operation or conduct of the work as drawn and specified. If the Contractor observes that a conflict exists between permit requirements and the work outlined in the contract documents, the Contractor shall promptly notify the COR in writing including a description of any necessary changes and changes to the contract price resulting from changes in the work.

B. Wherever references are made to standards or codes in accordance with which work is to be performed or tested, the edition or revision of the standards and codes current on the effective date of this contract shall apply, unless otherwise expressly set forth.

C. In case of conflict among any referenced standards or codes or between any referenced standards and codes and the specifications, the more restrictive standard shall be applied, or COR shall determine which to govern.

6. PROTECTION OF WORK, PROPERTY AND PERSON

A. The Contractor shall adequately protect the work areas, adjacent property, and the public, and shall be responsible for any damages or injury due to the Contractor’s actions.

7. CHANGES IN THE WORK

A. The Contracting Officer (CO) may order changes in the work, and the contract sum being adjusted accordingly. All such orders and adjustments plus claims by the Contractor for extra compensation must be made and approved in writing before executing the work involved.

B. All changes in the work, notifications and Contractor’s request for information (RFI) shall conform to the contract general condition requirements.

8. CORRECTION OF WORK

A. The Contractor shall re-execute any work that fails to conform to the requirements of the contract and shall remedy defects due to faulty materials or workmanship upon written notice from the CO, or COR at the soonest as possible time that can be coordinated with other work, and seasonal weather demands, but not more than 90 (ninety) days after notification.

9. DEFINITIONS

A. Contracting Officer (CO): The person appointed by the government to represent their interest in the review and approval of the work and to serve as the contracting authority with the Contractor.

The CO may appoint other persons to review and approve any aspects of the work.

B. Contracting Officer Representative (COR): The person appointed by the Government to represent their interest in the review and approval of the work.

C. Substantial Completion Acceptance (SCA): Date at conclusion of all Planting, Planting Soil, and Irrigation installation where the COR accepts all work performance in these sections is completed within scope, and the Warranty period has begun. This date may be different than the date of substantial completion for the other sections of the project.

D. Final Acceptance (FA): The date when the COR accepts that the plants and work in this section meet all the requirements of specification. It is intended that the materials and workmanship warranty for Planting, Planting Soil, and Irrigation work run concurrently.

10. SUBMITTALS

A. See the contract General Conditions for policy and procedures related to submittals.

B. Product data

1. Submit a minimum of (3) complete lists of all irrigation equipment to be used, manufacturer's brochures, maintenance manuals, warrantees, proper disposal documentation and operating instructions, within 15 days after the notice to proceed.

a. This submission may be done digitally, and all documents shall be submitted in one

PDF document.

2. The submittals shall be packaged and presented in an organized manner, in the quantity described in Division 1 of the specifications. Provide a table of contents of all submitted

32 8400-3 items.

3. Clearly identify on each submitted sheet by underlining or highlighting (on each copy) the specific product being submitted for approval. Failure to clearly identify the specific product being submitted will result in a rejection for the entire submittal. No substitutions of material or procedures shall be made concerning these documents without the written consent of an accepted equivalent by the COR.

4. Equipment or materials installed or furnished with2out prior approval of the COR, may be rejected by the COR and the Contractor shall be required to remove and properly dispose of such materials from the site at their own expense.

5. Approval of substitution of material and/or products, other than those specified shall not relieve the Contractor from complying with the requirements of the contract documents and specifications. The Contractor shall be responsible, at their own expense, for all changes that may result from the approved substitutions, which affect the installation, operations, or other items of their own work and/or the work of other Contractors.

C. Samples: Samples of the equipment may be required at the request of the COR if the equipment is other than that specified.

D. Other Submittals: Submit for approval:

1. Documentation of the installer’s qualifications.

2. As-built record set of drawings.

3. Testing data from all required pressure testing.

4. Backflow prevention device certification: Certification from the manufacturer or their representative that the back flow prevention device has been installed correctly according to the manufacture’s requirements.

5. Existing booster pump certification: Certification from the manufacturer or Contractor’s representative that the existing booster pump connections, pressure testing, full functionality have been certified according to the manufacturer’s requirements.

6. New irrigation controller certification: Certification from the manufacturer or an authorized distributor that the Controller has been installed correctly according to the manufacturer’s requirements.

11. OBSERVATION OF THE WORK

A. The COR may inspect the work at any time. They may remove samples of materials for conformity to specifications. Rejected materials shall be immediately removed from the site and replaced at the Contractor's expense. The cost of testing materials not meeting specifications shall be paid by the Contractor.

B. The COR shall be informed of the progress of the work so the work may be observed at the following key times in the construction process. The COR shall be afforded sufficient time to schedule visit to the site. Failure of the COR to make field observations shall not relieve the Contractor from meeting all the requirements of this specification.

1. Trenching, directional boring, and sleeving review.

2. Hydrostatic pressure testing.

3. Adjustment and coverage test.

4. Pre-maintenance observation.

5. Final acceptance / system malfunction corrections.

12. PRE-CONSTRUCTION CONFERENCE

A. Schedule a pre-construction meeting with the COR at least seven (7) days before beginning work to review any questions the Contractor may have regarding the work, administrative procedures during construction and project work schedule.

13. QUALITY ASSURANCE

A. It is the intention of this specification to accomplish the work of installing an automatic irrigation system, which will operate in an efficient and satisfactory manner. The irrigation system shall be installed and made operational according to the workmanlike standards established for landscape installation and sprinkler irrigation operation as set forth by the most recent Best Management Practices (BMP) of the Irrigation Association.

32 8400-4

B. The specification can only indicate the intent of the work to be performed rather than a detailed description of the performance of the work. It shall be the responsibility of the Contractor to install said materials and equipment in such a manner that they shall operate efficiently, conservational of all surface areas in support of optimum plant growth and health.

C. The COR shall be the sole judge of the true intent of the drawings, specifications and quality of all materials furnished in performance of the contract.

D. The Contractor shall keep one copy of all drawings and specifications on the work site, in good order. The Contractor shall make these documents available to the COR when requested.

E. In the event of any discrepancies between the drawings and the specification, the final decision as to which shall be followed, shall be made by the COR.

F. In the event the installation is contradictory to the direction of the COR, the installation shall be rectified by the Contractor at no additional cost to the Government. The Contractor shall immediately bring any such discrepancies to the attention of the COR.

G. It shall be distinctly understood that no oral statement of any person shall be allowed in any manner to modify any of the contract provisions. Changes shall be made only in written authorization of the Governments Representative.

H. Installer Qualifications: The installer shall be a firm with at least 5 years of successful experience in relation to the scope of work.

a. Installer Field Supervision: The installer shall maintain on site an experienced full-time supervisor who can communicate in English with the COR.

b. Submit the installer’s qualifications for approval.

14. IRRIGATION SYSTEM WARRANTY:

A. The Contractor shall Warrantee all workmanship and materials for a period of three years following the acceptance of the work.

1. Any parts of the irrigation work that fails or is defective shall be replaced or reconstructed at no expense to the Government including but not limited to restoring grades that have settled in trenches and excavations related to the work. Reconstruction shall include any plantings, soil, mulch or other parts of the constructed landscape that may be damaged during the repair or that results from soil settlement.

B. The date of acceptance of the work and start of the Guarantee period shall be determined by the COR, upon the finding that the entire irrigation system is installed as designed and specified, and found to be operating correctly, supplying water evenly to all planting and/or lawn areas.

C. The system controller shall be warranted by the equipment manufacturer against equipment malfunction and defects for a period of three years, following the acceptance of the work.

D. Neither the final acceptance nor any provision in the contract documents shall relieve the Contractor of responsibility for faulty materials or workmanship. The Contractor shall remedy any defects within a period of 5 business days from the date of notification of a defect.

15. SITE CONDITIONS

A. It is the responsibility of the Contractor to be aware of all surface and sub-surface conditions, and to notify the COR, in writing, of any circumstances that would negatively impact the installation of the work. Do not proceed with work until unsatisfactory conditions have been corrected.

16. DELIVERY, STORAGE, AND HANDLING

A. All materials and equipment shall be stored properly and protected as required by the

Contractor. The Contractor shall be entirely responsible for damages or loss by weather or other causes under the contract. Materials shall be furnished in ample quantities and at such times as to ensure uninterrupted progress of the work.

B. Deliver the products to the job site in their original unopened container with labels intact and legible at time of use, or review.

C. Store in accordance with the manufacturers' recommendations.

17. PROTECTION

32 8400-5

A. The Contractor shall continuously maintain adequate protection of all their work from damage, destruction, or loss, and shall protect the governments property from damage arising in connection with this contract. Contractor shall make good any such damage, destruction, loss or injury. Contractor shall adequately protect adjacent property as provided by law and the contract documents.

B. The Contractor shall maintain sufficient safeguards, such as railings, temporary walkways, lights, etc., against the occurrence of accidents, injuries or damage to any person or property resulting from their work and shall alone be responsible for the same if such occurs.

C. All existing paving, structures, equipment or plant material shall be always protected, including the irrigation system related plants from damage by workers and equipment.

1. The Contractor shall follow all protection requirements including plant protection provision of the general contract documents. All damages shall be repaired or replaced at the Contractor's expense. Repairs and or replacement shall be to the satisfaction of the COR, including the selection of a Contractor to undertake the repair or maintenance. Repairs shall be at no cost to the Government.

2. For trees damaged to the point where they will not be expected to survive or which are severely disfigured and that are too large to replace, the cost of damages shall be as determined by the Government’s Arborist using accepted tree value evaluation methods.

D. The Contractor shall refrain from trenching within the drip line of any existing tree to remain.

The COR may require the Contractor to relocate proposed irrigation work, bore lines beneath roots or use Pneumatic Soil Excavation tools (e.g. Airspade) technology to dig trenches through and under the root system to avoid damage to existing tree root areas.

18. EXCAVATING AROUND UTILITIES

A. Contractor shall carefully examine the civil, record, and survey drawings to become familiar with the existing underground conditions before trenching and follow all OHSA, or other related guidelines in relation to trenching, digging, and excavating.

1. Do not begin any trenching until all underground utilities have been located and properly marked. Determine location of underground utilities and perform work in a manner that will avoid possible damage. Hand excavate as required. Maintain stakes and or markings set by contractor until parties concerned mutually agree to their removal.

B. Notification of DigAlert is required for all excavation around utilities. The Contractor is responsible for knowing the location and avoiding utilities that are not covered by the DigAlert dial 811or 1-800-422-4133.

C. Section 4216/4217 of the government code requires a dig-alert identification number be issued before a “permit to excavate” will be valid. For your dig-alert identification number call underground service alert toll free 1-800-422-4133 two working days before beginning construction.

19. POINT OF CONNECTION

A. The point of connection of the irrigation system to its electrical power sources shall be provided by the General Contractor’s licensed electrical Contractor per governing codes at the location shown on the drawings. The irrigation Contractor will connect the power to provided junction box or grounded plug receptacle.

B. The point of connection of the irrigation system to its potable and or non-potable water sources, including the main shutoff valve and backflow preventer shall be provided by the General Contractor’s licensed plumbing Contractor per governing codes at the location shown on the drawings. The minimum size and water pressure of the pressurized line will be as noted on the irrigation drawing.

20. TEMPORARY UTILITIES

A. All temporary piping, wiring, meters, panels and other related appurtenances required between source of supply and point of use shall be provided by the Contractor and coordinated with the COR. Existing utilities may be used with the written permission of the government.

21. CUTTING, PATCHING, TRENCHING AND DIGGING

32 8400-6

A. The Contractor shall do all cutting, fitting, trenching or patching of their work that may be required to make its several parts come together as shown upon, or implied by, the drawings and specifications for the completed project.

B. Digging and trenching operations shall be suspended when the soil moisture is above field capacity.

22. USE OF PREMISES

A. The Contractor shall confine their apparatus; the storage of materials, and the operations of their workers to limits indicated by the law, ordinances, or permits and shall not unreasonably encumber the premises with their materials.

B. Contractor parking, materials and equipment storage locations shall be in areas approved by the COR. Government is not responsible for any vehicles, materials and equipment associated with this contract for thief, damage, natural causes, or loss. It’s the contractor’s sole responsibility with costs associated with these types of circumstances of due cause.

23. AS-BUILT RECORD SET OF DRAWINGS

A. Immediately upon the installation of any buried pipe or equipment, the Contractor shall indicate on the progress record drawings the locations of said piping or relative equipment. The progress record drawings shall be made available at any time for review by the COR.

B. Before final acceptance of work, the Contractor shall provide an as-built record set of drawings showing the irrigation system work as built. The drawings shall be transmitted to the COR in paper format and as a pdf file of each document on compact disk or flash drive.

The drawings shall include all information shown on the original contract document and revised to reflect all changes in the work. The drawings shall include the following additional information

1. All valves shall be numbered by station and corresponding numbers shall be shown on the as-built record set of drawings.

2. All main line pipe or irrigation equipment including sleeves, valves, sensors, controllers, irrigation wire runs which deviate from the mainline location, backflow preventers, remote control valves, grounding rods, shut-off valves, rain sensors, moisture sensors, wire splice locations, and quick coupling valves shall be located by two (2) measured dimensions, to the nearest one-half foot. Dimensions shall be given from permanent objects such as buildings, sidewalks, curbs, walls, structures and driveways. All changes in direction and depth of main line pipe shall be noted exactly as installed. Dimensions for pipes shall be shown at no greater than 50-ft. maximum intervals.

3. As-built record set of drawings shall be signed and dated by the Contractor attesting to and certifying the accuracy of the as-built record set of drawings. As-built record set of drawings shall have "As-Built Record Set of Drawings”, company name, address, phone number and the name of the person who created the drawing and their contact’s name (if different).

C. The Government shall make the original contract drawing files available to the Contractor.

24. CONTROLLER CHARTS:

A. Provide one controller chart for each automatic controller installed.

1. On the inside surface of the cover of each automatic controller, prepare and mount a color-coded chart showing the valves, main line, sensors, and systems serviced by that controller.

All valves shall be numbered to match the operation schedule and the drawings. Only those areas controlled by that controller shall be shown. This chart shall be a plot plan, entire or partial, showing buildings, walks, walkways, roads and walls. The plan, reduced as necessary and legible in all details, shall be made to a size that will fit into the controller cover. This print shall be approved by the COR and shall be protected in laminated in a plastic cover and be secured to the inside back of the controller cabinet door.

2. The controller chart shall be completed and approved prior to acceptance of the work.

25. TESTING

A. Provide all required system testing with written reports as described in part 3.

26. OPERATION AND MAINTENANCE MANUALS AND GUARANTEES

32 8400-7

A. Prepare and deliver to the COR within ten calendar days prior to completion of construction, two 3-ring hard cover binders containing the following information:

1. Index sheet stating Contractor's address and telephone number, list of equipment with name and addresses of local manufacturers' representatives.

2. Catalog and parts sheets on all material and equipment.

3. Guarantee statement. The start of the guarantee period shall be the date the irrigation system is accepted by the Government.

4. Complete operating and maintenance instruction for all major equipment.

5. Irrigation product manufacturers warrantees.

B. In addition to the above-mentioned maintenance manuals, provide the Government’s maintenance personnel with instructions for maintaining major equipment and show evidence in writing to the COR at the conclusion of the project that this has been rendered.

PART 2 – PRODUCTS

2.1 MATERIALS GENERAL

A. All materials shall be of standard, approved and first grade quality and shall be new and in perfect working condition when installed and accepted.

B. The use of a manufacturer's name and model or catalog number is for the purpose of establishing the standard of quality and configuration desired only. Other manufacturer's equipment may be submitted for approval with written approval by the COR. Substituted equipment shall not substantially alter the operations of the system.

C. All controllers, valves, sensors, and heads (add other product categories if needed) shall be manufactured by the following manufacturer(s) (or approved equal).

1. Rain Bird

2. Toro

3. Orbit

4. Irritrol

B. Approval of any items indicates only that the product(s) apparently meet the requirements of the drawings and specifications based on the information or samples submitted. The Contractor shall be responsible for the performance of substituted items. If the substitution proves to be unsatisfactory or not compatible with other parts of the system, the Contractor shall replace said items with the original specified items, including all necessary work and modifications to replace the items, at no cost to the government.

2.2 PIPING MATERIAL

A. Individual types of pipe and fittings supplied are to be of compatible manufacturer unless otherwise approved. Pipe sizes shown are nominal inside diameter unless otherwise noted.

B. Plastic pipe:

1. All piping shall be free of blisters, internal striations, cracks, or any other defects or imperfections. The piping shall be continuously and permanently marked with the following information: manufacturer’s name or trademark, size, class and type of pipe pressure rating, quality control identifications, date of extrusion, and National Sanitation Foundation (NSF) rating.

2. Pressure main line for piping upstream of remote-control valves and quick coupling valves:

a. Pipe smaller than 2-inch diameter shall be plastic pipe for use with solvent weld or threaded fittings. Shall be manufactured rigid virgin polyvinyl chloride (PVC) 1220, Type 1, Grade 2 conforming to ASTM D 1785, designated as Schedule 40.

b. Pipe 2 - 3-inch diameter shall be manufactured rigid virgin polyvinyl chloride (PVC), Type 1, Grade 2 conforming to ASTM D 1785, designated as bell gasket Class 315.

c. Pipe larger than 3-inch diameter shall be manufactured rigid virgin polyvinyl chloride (PVC), Type 1, Grade 2 conforming to ASTM D 1785, designated as bell gasket Class

200 PVC.

3. Non-pressure lateral line for piping downstream of remote-control valves: plastic pipe for use

32 8400-8 with solvent weld or threaded fittings. Shall be manufactured rigid virgin polyvinyl chloride PVC 1220 (type 1, grade 2) conforming to ASTM d 1785, designated as Class 200, 3/4ʺ minimum size.

C. Galvanized pipe shall be used for above ground connections to, backflow prevention device assemblies, hose bibs, booster pumps, and pressure tank and as shown on the plans and details.

1. Pipe shall be hot dip galvanized continuous welded, seamless, Schedule 40 conforming to applicable current ASTM standards.

2.3 FITTINGS AND CONNECTIONS:

A. Polyvinyl chloride pipe fittings and connections: Type II, Grade 1, Schedule 40, high impact molded fittings, manufactured from virgin compounds as specified for piping tapered socket or molded thread type, suitable for either solvent weld or screwed connections. Machine threaded fittings and plastic saddle and flange fittings are not acceptable. Furnish fittings permanently marked with following information: nominal pipe size, type and schedule of material, and National Sanitation Foundation (NSF) seal of approval. PVC fittings shall conform to ASTM D2464 and D2466.

B. Brass pipe fittings, unions and connections: standard 125-pound class 85% red brass fittings and connections, IPS threaded.

C. PVC Schedule 80 threaded risers and nipples: Type I, grade 1, Schedule 80, high impact molded, manufactured from virgin compounds as specified for piping and conforming to ASTM D-2464. Threaded ends shall be molded threads only. Machined threads are not acceptable.

D. Galvanized pipe fittings shall be galvanized malleable iron ground joint Schedule 40 conforming to applicable current ASTM standards.

2.4 SOLVENT CEMENTS AND THREAD LUBRICANT

A. Solvent cements shall comply with ASTM D2564. Socket joints shall be made per recommended procedures for joining PVC plastic pipe and fittings with PVC solvent cement and primer by the pipe and fitting manufacturer and procedures outlined in the appendix of

ASTM D2564.

B. Thread lubricant shall be Teflon ribbon-type, or approved equal, suitable for threaded installations as per manufacturer's recommendations.

C. Pipe Joint Compound (Pipe dope) shall be used on all galvanized threaded connections. Pipe Joint Compound is a white colored, non-separating thread sealant compound designed to seal threaded connections against leakage due to internal pressure. It shall contain PTFE (Polytetrafluoroethylene) to permit a tighter assembly with lower torque, secure permanent sealing of all threaded connections and allow for easy disassembly without stripping or damaging threads.

2.5 BACKFLOW PREVENTION DEVICES

A. The backflow prevention device shall be certified to NSF/ANSI 372 shall be ASSE Listed

1013, rated to 180-degree F, and supplied with full port ball valves.

B. The main body and access covers shall be low lead bronze (ASTM B 584) C. The seat ring and all internal polymers shall be NSF Listed Noryl, and the seat disc elastomers shall be silicone.

D. Backflow Preventer shall be as indicated on the drawings.

2.6 PRESSURE REGULATOR

A. Pressure regulator shall certify to NSF/ANSI 372, consisting of low lead bronze body bell housing, a separate access cap shall be threaded to the body and shall not require the use of ferrous screws.

B. The main valve body shall be cast bronze (ASTM B 584).

C. The access covers shall be bronze (ASTM B 584 or Brass ASTM B 16).

D. The assembly shall be of the balanced piston design and shall reduce the pressure in both flow and no flow conditions.

E. Pressure regulator shall be as indicated on the drawings.

32 8400-9

2.7. WYE STRAINER

A. Strainer shall conform to MIL –S-16293 and be ANSI 3rd party certified to comply with the states lead plumbing law 0.25% maximum weighted average lead content.

B. The main body shall be low lead bronze (ASTM B 584).

C. The access covers shall be yellow brass or cast bronze (ASTM B 16 or ASTM B 584).

D. Strainer screen shall be 300 series stainless steel available in 20, 40, 60, 80, or 100 mesh.

E. Wye strainer shall be as indicated on the plans.

2.7 BACKFLOW PREVENTER CAGE

A. A heavy-duty steel mesh cage with rust proof finish. The caging shall be sized to allow space for the entire piping assembly associated with the Backflow Preventer unit, and all associated equipment.

B. The cage shall include the manufacturers’ standard tamper proof locking mechanism.

C. Provide a concrete base as detailed on the drawings.

D. Backflow Preventer Cage type, manufacturer and color shall be as indicated on the plans.

2.8 BOOSTER PUMP

A. Test and verify that existing booster pump is operational.

B. Provide options for repair or replacement of existing booster pump.

C. Booster pump shall be housed in a sturdy, locking, weather-resistant case, furnished for maximum exterior protection.

D. Booster pump shall be as indicated on the drawings.

2.9 PRESSURE TANK

A. Test and verify that existing pressure tank is operational.

B. Provide options for repair or replacement of existing pressure tank.

C. Pressure tank exterior components shall be housed in a sturdy, locking, weather-resistant casing, furnished for maximum exterior protection.

D. Pressure tank shall be as indicated on the drawings.

2.10 BALL VALVES

A. Ball valves for 3/4 inch through 2-1/2 inch shall be of PVC, block, true-union design with

EDPDM seals and O-ring.

B. Ball valves for 3-inch and larger shall be gate design and shall be iron body, brass or bronze mounted AWWA gate valves, and shall have a clear waterway equal to the full nominal diameter of the valve, and shall be rubber gasket, flanged or mechanical joint only, and shall be able to withstand a continuous working pressure of 150 PSI. Valve shall be equipped with a square- operating nut.

C. All ball valves located in a valve manifold shall be the same size as the main line (1-1/2 inch size minimum). Provide pipe-reducing adapters down stream of valves, as required. All ball valves in line shall be the same size as the pipe.

D. Ball valves shall be as indicated on the drawings.

2.11 CHECK VALVES

A. Swing check valves 2-inch and smaller shall be 200 lbs., W.O.G., bronze construction with replaceable composition, neoprene or rubber disc and shall meet or exceed federal specification WW-V- 5ld, class a, type iv.

B. Anti-drain valves shall be of heavy-duty virgin PVC construction with female iron pipe thread inlet and outlet. Internal parts shall be stainless steel and neoprene. Anti-drain valves shall be field adjustable against draw out from 5 to 40 feet of head.

C. Check valves shall be as indicated on the drawings.

2.12 REMOTE CONTROL VALVES

A. Remote control valves shall be electrically operated, single seat, normally closed configuration, equipped with flow control adjustment and capability for manual operation.

B. Valves shall be actuated by a normally closed low wattage solenoid using 24 volts, 50/60 cycle solenoid power requirement. Solenoid shall be epoxy encased. A union shall be installed on the discharge end.

C. Remote control valves shall be wired to controller in same numerical sequence as

32 8400-10 indicated on drawings.

D. Remote control valves shall be as indicated on the drawings.

2.13 MASTER CONTROL VALVES

A. Master Control Valve shall be compatible with the irrigation controller.

2.14 FLOW SENSOR

A. Flow sensor shall be compatible with the irrigation controller.

2.15 MOISTURE SENSORS

A. Moisture sensor shall be compatible with the irrigation controller.

B. Moisture sensors shall be provided for each control zone.

2.16 HYDROMETER

A. Hydrometer shall be compatible with the irrigation controller.

2.17 QUICK COUPLER VALVES

A. Quick coupler valves shall be a one- or two-piece, heavy-duty brass construction with a working pressure of 150 PSI with a built-in flow controller and a self-closing valve.

B. Quick coupler shall be equipped with locking red brass cap covered with durable yellow thermo- plastic rubber cover. Key size shall be compatible with quick coupler and of same manufacturer.

2.18 SPRINKLER HEADS

A. All sprinkler heads shall have check valves installed.

B. All sprinkler heads shall be submitted for review and approval by COR.

C. Riser nipples for all sprinkler heads shall be the same size as the riser opening in the sprinkler body and fabricated as shown on the drawings.

2.19 AUTOMATIC CONTROLLER.

A. Controller shall be housed in a sturdy, locking, weather-resistant case, furnished for maximum exterior protection.

B. Controller shall be equipped with evapo-transpiration (ET) sensor, which adjusts the controller programming based on local climatic conditions. The sensor shall also have a rain sensing shut-off switch, wind sensing shut off switch, and freeze sensing shut-off of switch.

1. If a moisture sensor is used in lieu of an evapo-transpiration sensor an additional sensor, which has a rain-sensing shut-off switch, wind sensing shut-off switch, and freeze sensing shut-off switch shall be provided.

C. Automatic controller shall be as indicated on the drawings.

2.20 CONTROLLER DECODERS

A. All decoders shall be per the controller manufacturer’s specifications.

2.21 ELECTRICAL CONTROL WIRING

A. Low voltage

1. The electrical control wire shall be direct burial type UF, no. 14 AWG, solid, single conductor, copper wire UL approved or larger, if required to operate system as designed.

2. For 2-Wire controllers all irrigation wire for the controller, flow sensor, master valve, hydrometer, remote control valves and moisture sensors shall be per the controller manufacturer’s specifications and recommendations.

3. Color code wires to each valve. Common wire shall be white.

4. If multiple controllers are being utilized, and wire paths of different controllers cross each other, both common and control wires from each controller to be of different colors.

5. Control wire splices: Splices are when required shall be placed in splice boxes.

6. Wire connections shall be per the controller manufacturer’s specifications and recommendations.

B. High voltage

1. Shall be of type as required by local codes and ordinances.

2. Shall be of proper size to accommodate needs of equipment it is to serve.

2.22 VALVE BOXES AND MATERIALS

A. Valve boxes: valve boxes shall be constructed of ABS (acrylonitrile butadiene styrene) plastic, 32 8400-11 green in color, with rigid base and sides and shall be supplied with bolt lock cover secured with stainless steel bolts. Cover shall be identified as shown on drawings. Provide box extensions as required.

1. Master valves, flow sensors, remote control irrigation valves, gate valves, and ball valves 3-inch or less in size shall use a rectangular box.

2. Quick coupler valves, wire splices, and grounding rods shall use a 10-inch circular box.

2.23 CONCRETE THRUST BLOCKS

A. Concrete thrust blocks shall be sized per the pipe manufactures requirement or as indicated on the drawings.

2.24 VALVE IDENTIFICATION TAGS

A. Valve Identification Tags shall be 2.25 inch x 2.65 inch polyurethane. Color: potable water;

yellow / non-potable water; purple. Tags shall be permanently attached to each remote-control valve with tamper proof seals as indicated on the drawings.

2.25 EQUIPMENT TO BE FURNISHED TO GOVERNMENT

A. Two (2) sets of keys for each automatic controller.

B. Two (2) 48-inch tee wrenches for operating the gate valves.

C. Three (3) sets of special tools required for removing, disassembling and adjusting each type of sprinkler and valve supplied on this project.

D. Five (5) Extra sprinkler heads, nozzles, shrub adapters, nozzle filter screens, for each type used on the project.

E. Two (2) quick coupler keys to match manufacturer type of quick coupler.

2.26 INCIDENTAL MATERIALS AND EQUIPMENT

A. Furnish all materials and equipment not specified above, but which are necessary for completion of the work as intended.

2.27 MAIN LINE LOCATOR TAPE

A. 3-inch wide plastic detectable locator tape.

2.28 MAIN LINE AND LATERAL LINE BEDDING SAND

A. Sand shall consist of natural or manufactured granular material, free of organic material, mica, loam, clay or other substances not suitable for the intended purpose.

B. Sand shall be masonry sand ASTM C 144 or coarse concrete sand, ASTM C 33.

PART 3 – EXECUTION

3.1 GENERAL REQUIREMENTS

A. Code requirements shall be those of state and municipal codes and regulations locally governing this work, providing that any requirements of the drawings and specifications, not conflicting therewith, but exceeding the code requirements, shall govern unless written permission to the contrary is granted by the COR.

B. Extreme care shall be exercised at all times by the Contractor in excavating and working in the project area due to existing utilities and irrigation systems to remain. Contractor shall be fully responsible for expenses incurred in the repair of damages caused by their operation.

1. The Contractor is responsible for identifying and maintaining existing irrigation main lines that supply water to areas on the site as noted on the drawings and outside of the proposed limit of work. The Contractor shall relocate or replace existing irrigation main line piping as required to provide a continuous supply of water to all areas of existing irrigation on site.

a. Providing continuous water supply shall include hand watering and or the use of watering trucks to provide adequate water.

C. Plan locations of backflow preventers, valves, controllers, sensors, irrigation lines, sleeves, spray heads and other equipment are diagrammatic and indicate the spacing and relative locations of all installations. Final site conditions and existing and proposed plantings shall

32 8400-12 determine final locations and adjusted as necessary and as directed to meet existing and proposed conditions and obtain complete water coverage. Minor changes in locations of the above from locations shown shall be made as necessary to avoid existing and proposed trees, piping, utilities, structures, etc. at the Contractor's expense or when directed by the COR.

1. The Contractor shall be held responsible for relocation of any items without first obtaining the COR's approval. The Contractor shall remove and relocate such items at their expense if so directed by the COR.

D. Prior to any work the Contractor shall stake out locations of all piping, valves, equipment and irrigation heads and emitters using an approved staking method and maintain the staking of the approved layout in accordance with the drawings and any required modifications. Verify all horizontal and vertical site dimensions prior to staking of heads. Do not exceed spacing shown on drawings for any given area. If such modified spacing demand additional or less material than shown on the drawings, notify the COR before beginning any work in the adjacent area.

E. Stub out main line at all ends run and as shown on drawings. Stub out wires for future connection where indicated on plans and as directed.

F. Point of connection shall be approximately as shown on drawings. Connect new underground piping and valves and provide all flanges, adapters or other necessary fittings for connection.

G. Permission to shut off any existing in-use water line must be obtained 48 hours in advance, in writing from the Government. The Contractor shall receive instructions from the COR as to the exact length of time of each shut-off.

H. No fittings shall be installed on pipe underneath pavement or walls.

I. Prior to starting any work, Contractor shall obtain a reading of existing static water pressure

(no flow condition) at the designated point of connection and immediately submit written verification of pressure with date and time of recording to COR.

3.2 TRENCHING, DIRECTIONAL BORING, AND SLEEVING

A. Perform all trenching, directional boring, sleeving and excavations as required for the installation of the work included under this section, including shoring of earth banks to prevent cave-ins.

B. The Contractor may directional bore lines where it is practical or where required on the plans.

1. Extend the bore 1-foot past the edge of pavement unless noted differently on the plans

2. Cap ends of each bore and locate ends at finished grade using metal stakes.

3. All boring and sleeving shall have detectable locator tape placed at the ends of the pipe.

C. Make trenches for mains, laterals and control wiring straight and true to grade and free of protruding stones, roots or other material that would prevent proper bedding of pipe or wire.

D. Excavate trenches wide enough to allow a minimum of 4-inch between parallel pipelines and 8-inch from lines of other trades. Maintain 3-inch vertical clearance between irrigation lines.

Minimum transverse angle is 45 degrees. All pipes shall be able to be serviced or replaced without disturbing the other pipes.

E. Trenches for pipelines shall be made of sufficient depth to provide the minimum cover from finished grade as follows:

1. Pressure main line: 18-inches below finish grade and 24-30 inches below paved areas in Schedule 40 PVC sleeves.

2. Reclaimed water constant pressure main lines shall cross at least 12-inches below potable water lines.

a. If a constant pressure reclaimed water main line must be installed above a potable water line or less than 12-inches below a potable water line, then reclaimed water line shall be installed within an approved protective sleeve. The sleeve shall extend 10-feet from each side of the center of the potable line, for a total of 20-feet. The sleeve shall be color-coded (purple) for use with reclaimed water.

3. Lateral lines: 12-inches below finish grade and 18-inches below paved areas in Schedule 40 PVC sleeves.

4. Control wiring: to the side of pressure main line and 24-inches below paved areas in Schedule 40 PVC sleeves.

32 8400-13

F. On new on-site systems (post-meter), the required horizontal separation between potable water lines, reclaimed water constant pressure main lines and sewer lines shall be a minimum of 4-feet apart as directed by the project engineer and, or regulatory agency. Measurements shall be between facing surfaces, not pipe centerlines.

G. When trenching through areas of imported or modified soil, deposit imported or modified soils on one side of trench and subsoil on opposite side.

H. Backfill the trench per the requirements in paragraphs “Backfilling and Compacting” below.

3.3 PIPE INSTALLATION

A. General Pipe Installation

1. Exercise caution in handling, loading and storing, of plastic pipe and fittings to avoid damage.

a. The pipe and fittings shall be stored under cover until using, and shall be transported in a vehicle with a bed long enough to allow the length of pipe to lay flat so as not to be subjected to undue bending or concentrated external load at any point.

b. All pipe that has been dented or damaged shall be discarded unless such dent or damaged section is cut out and pipe rejoined with a coupling.

2. Trench depth shall be as specified above from the finish grade to the top of the pipe.

3. Install a detectable pipe locator tape 6 to 8-inches above all main line pipes.

B. Polyvinyl Chloride Pipe (PVC) Installation

1. Under no circumstance is pipe to rest on concrete, rock, wood blocks, construction debris or similar items.

2. No water shall be permitted in the pipe until a period of at least 24 hours has elapsed for solvent weld setting and curing.

3. Install assemblies and pipe to conform to respective details and where shown diagrammatically on drawings, using first class workmanship and best standard practices as approved. All fittings that are necessary for proper connections such as swing joints, offsets, and reducing bushings that are not shown on details shall be installed as necessary and directed as part of the work.

4. Dielectric bushings shall be used in any connections of dissimilar metals.

5. Gasketed plastic pipe: pipe-to-pipe joints or pipe to fittings shall be made in accordance with manufacturer’s specifications.

6. Solvent weld or threaded plastic pipe:

a. Installation of all pipe and fittings shall be in strict accordance with manufacturer’s specifications.

b. Pipe shall be cut using approved PVC pipe cutters only. Sawed joints are disallowed.

All field cuts shall be beveled to remove burrs and excess before gluing.

c. Welded joints shall be given a minimum of 15 minutes to set before moving or handling. Excess solvent on the exterior of the joint shall be wiped clean immediately after assembly.

d. Plastic to metal connections shall be made with plastic adapters and if necessary, short (not close) brass threaded nipples. Connection shall be made with two (2) wraps of Teflon tape and hand tightened plus one turn with a strap wrench.

e. Snake pipe horizontally in trench to allow 1-foot of expansion and contraction per 100-feet of straight run.

f. Threaded pipe joints shall be made using Teflon tape. Solvent shall not be used with threaded joints. Pipe shall be protected from tool damage during assembly. All damaged pipes shall be removed and replaced. Take up threaded joints with light wrench pressure.

g. No close nipples or risers are allowed. Cross connections in piping are disallowed.

h. Center load pipe at 10-feet on center intervals with small amount of backfill to prevent arching and slipping under pressure. Other than this preliminary backfill all pipe joints, fittings and connections are to remain uncovered until successful completion of hydrostatic testing and written approval of the testing report.

i. Concrete thrust blocks shall be constructed behind all pipe fittings 1-1/2 inch diameter and larger at all changes of direction of 45 degrees or more.

32 8400-14

C. Galvanized Pipe Installation

1. All joints shall be threaded with pipe joint compound used on all threads.

2. Dielectric bushings shall be used in any connections of dissimilar metals.

3.4 TRENCHING, DIRECTIONAL BORING, AND SLEEVING REVIEW:

A. Upon completion and installation of all trenching, directional boring, and sleeving, all installed irrigation control wiring, lines and fittings shall be visually observed by the COR unless otherwise authorized. Do not cover any wires, lines or fittings until they have been tested and observed by the COR.

3.5 FLUSHING

A. Openings in piping system during installation are to be capped or plugged to prevent dirt and debris from entering pipe and equipment. Remove plugs when necessary to flush or complete system.

B. After completion and prior to the installation of any terminal fittings, the entire pipeline system shall be thoroughly flushed to remove dirt, debris or other material.

3.6 HYDROSTATIC PRESSURE TESTING

A. After flushing, and the installation of valves the following tests shall be conducted in the sequence listed below. The Contractor shall furnish all equipment; materials and labor necessary to perform the tests and all tests shall be conducted in the presence of the COR.

B. Water pressure tests shall be performed on all pressure main lines before any couplings, fittings, valves and the like are concealed.

C. Immediately prior to testing, all irrigation lines shall be purged of all entrapped air or debris by adjusting control valves and installing temporary caps forcing water and debris to be discharged from a single outlet.

D. Test all pressure main line at 150 PSI. For a minimum of four (4) hours with an allowable loss of 5 PSI.