SECTION 32 8400

PLANTING IRRIGATION

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[LANL MASTER SPECIFICATION]{.underline}

This template must be edited for each project.  In doing so, specifier
must add job-specific requirements.  Brackets are used in the text to
indicate designer choices or locations where text must be supplied by
the designer.  Once the choice is made or text supplied, remove the
brackets.  The specifications must also be edited to delete
specification requirements for processes, items, or designs that are not
included in the project \-- and specifier's notes such as these.  To
seek a variance from requirements in the specifications that are
applicable, contact the Engineering Standards Manual Civil
[POC](http://engstandards.lanl.gov/engrman/3civ/htmls/civilnew2.htm).
Please contact POC with suggestions for improvement as well.\
\
When assembling a specification package, include applicable
specifications from all Divisions, especially Division 1, General
requirements.\
\
Specification developed for ML-4 projects.  For ML-1, 2, and 3
applications, additional requirements and independent reviews should be
added if increased confidence in procurement or execution is desired;
see ESM Chapter 1 Section Z10 Specifications and Quality sections.

This specification is to be used for the establishment or
reestablishment of vegetation. See ESM Civil Chapter 3, Section G2050,
Landscaping and ESM Architectural Chapter 4, Section B-C_GEN, G2050 for
additional guidance.

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1.  GENERAL

1.1 SECTION INCLUDES

A. Underground sprinkler system.

B. The Work consists of providing an underground irrigation system as
shown and specified, furnishing of labor, equipment, appliances, and
materials including but not limited to piping, valves, backflow
preventer, heads, drains, controllers, and other components, accessories
and appurtenances required for a complete~~,~~ and operable system.
Perform required trenching, excavation, boring, backfilling and
compacting.

2.  RELATED SECTIONS

    A.  Section 31 2000, Earth Moving

    B.  Section 22 1100, Facility Water Distribution

1.3 SUBMITTALS

A. Submit the following in accordance with Section 01 3300, Submittal
Procedures:

1\. Catalog data for all equipment furnished under this Section.

2\. Installation instructions for underground sprinkler system.

3\. Operating and maintenance manual.

a\. Prepare a zone chart for each controller with waterproof,
color-coded diagram keying stations of the controller to valve locations
and to the irrigation heads served by the station. Diagram is to be
mounted inside the door of the automatic controller. Copy to be included
in the Operation and Maintenance Manual.

4\. Irrigation plan, to scale, showing the location of irrigation
equipment: controllers and electrical connections, backflow preventer,
valves, heads, piping and equipment schedule. Refer to Part 3 for
required location of irrigation equipment.

5\. Record Drawing: Prepare and make corrections as required by LANL. On
a record print mark the exact arrangement of the irrigation system,
including the location of valves and main lines. Show locations by a
system of measurements from easily identified, permanent features such
as building, roads and walks.

1.4 QUALITY ASSURANCE

A. Work shall be performed by a licensed Subcontractor experienced in
irrigation systems, with the type and scale of work required and having
the equipment and personnel adequate to perform the work satisfactorily.

B.  Provide underground sprinkler system in as complete a unit as
    possible, produced by a single manufacturer, including heads,
    valves, piping circuits, controls, and accessories.

C.  Site design analysis shall consider drainage, topography, soil
    conditions, and environmental conditions with respect to slope
    orientation and precipitation.

1.5 STORAGE AND HANDLING

A. Follow manufacturer's recommended procedures in loading, unloading,
stacking, transporting and handling all materials to be used.

1.6 JOB CONDITIONS

A. Prior to installing irrigation heads, stake or otherwise locate trees
and shrub areas according to plans, or as adjusted in field under LANL's
direction. Coordinate bubblers and shrub pop-ups with tree and shrub
locations. Do not lay irrigation lines in rootball zones of plants.
Coordinate the work of constructing the irrigation system with the
planting schedule.

2.  PRODUCTS

    1.  PLASTIC PIPE AND FITTINGS

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valves, and other necessary, related material from the point of
connection through the backflow preventer to the master control valve
shall conform to the requirements of LANL Master Specification 22 1100.

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A. Pressure Lines: Schedule 40 or Schedule 80 PVC pipe, ASTM D 1785, as
shown on Drawings.

B. PVC Fittings: Schedule 40, ASTM D 2466; Schedule 80, ASTM D 2467.

C. Nipples: 3/4 inch and 1 inch, Schedule 80, PVC, threaded.

2.2 CLEANER, PRIMER AND SOLVENT CEMENTS

A. Use compatible cleaner, primer, and solvent cements. Comply with the
requirements of ASTM D 2855 for solvent-cemented joints.

2.3 SPRINKLER HEADS

A.  Install as shown on the Drawings. The irrigation design is based on
    the characteristics of the following standard heads:

> Toro Company:
>
> Large Radius Head Model No. 640
>
> Medium Radius Head Model No. 700 Super
>
> Small Lawn Pop-up Model No. 570-4P
>
> Shrub Pop-up Model No. 570-HP or 570-6P
>
> Bubblers for Shrub Areas Model No. 570 series
>
> Bubblers - Adjustable Model No. 514-20

2.4 DRIP EMITTERS

A. Provide fittings and drip tubing compatible with drip emitters.
Provide solvent-cemented joints or compression type fittings between
drip system and PVC irrigation system.

2.5 VALVES

A. Provide automatic valves (type and size) as indicated on Drawings.
Valves shall have a manual bleed screw in the handle and bleed ports
protected with built in filter. Valves shall be made of noncorrosive
material. The valve shall open and close smoothly with low-pressure
loss. The valve shall be installable at any angle and have a flow
control and manual shut off. The solenoid shall be 24 volts A.C.60 Hz
and have a consumption not exceeding 2 watts. Manufacturer: Toro Inc.,
Model 216 brass body.

B. Provide manual gates valve, Type 1, rated at 250 lbs. water pressure,
threaded ends, meeting MSS SP-80, bronze body, bronze trim, hand wheel
for Gate, Globe, Angle and Check Valves Specification.

2.6 QUICK COUPLER VALVES

A. Provide quick coupler valves as indicated on the Drawings. Provide
coupler keys, swivel ells, and hose bibs in the quantity of one for each
quick coupler.

2.7 AUTOMATIC DRAIN VALVES

A. Provide automatic drain valves. The valve shall open when pressure in
line decreases to 9 psig and seal again when pressure increases to 10
psig. Provide valves with screens on both inlet and outlet. Drain valves
to be installed only on laterals of nominal pipe size 1-1/2 inch or
less. Install valves at low points and at 100 feet on center in the
laterals.

2.8 BACKFLOW PREVENTER

A.  Furnished and installed by the Subcontractor. Installed per LANL
    Mechanical Standard Drawing ST-D20GEN-1.

B.  Backflow preventer shall conform to LANL Master Specification 22
    1100.

2.9 VALVE BOX

A.  Provide HDPE plastic or fiberglass valve boxes with plastic locking
    cover.

B.  Covers shall be labeled "Irrigation Control Valve".

2.10 GRAVEL DRAIN BACKFILL

A. Cleaned gravel or crushed stone, graded from 3/4 inch minimum to
1-1/2 inch maximum.

2.11 WIRING MATERIALS

A. Provide UL-approved wire for direct burial, Type UF 600 Volts.
Minimum gauge No. 14 AWG. Control wire must be insulated, single stand
copper designed for use with 24 to 50 volts and copper conductor must
meet or exceed ASTM B-3 specifications.

B. Make electrical wire splices water-tight using an appropriate sealing
material. Underground, buried splices are not allowed.

12. AUTOMATIC CONTROL SYSTEM

A. Furnish low voltage system manufactured expressly for control of
automatic circuit valves of underground sprinkler systems. Provide unit
of capacity to suit number of circuits as indicated.

B. Provide manufacturer's standard control enclosure with locking cover,
complying with NFPA 70 (National Electric Code). Provide weather proof
enclosures at exterior locations.

C. Provide a transformer to convert site service voltage to control
voltage of 24 volts. Provide dedicated breaker for controller at power
panel connection.

D. Controller: Motorola MIR 5000C Field Unit, radio controlled.

PART 3 EXECUTION

3.1 EXAMINATION

A. Carefully investigate the structural and finished conditions
affecting the work, and plan work accordingly to furnish fittings and
appurtenant items that are required to meet field conditions. Install
the work so conflicts between sprinkler installation, existing
utilities, planting and other new and existing features shall be
avoided.

B. Notify the LANL Construction Inspector 10 days prior to startup of
construction to have LANL's support services subcontractor identify
known underground utilities and stake and flag locations. If a conflict
exists between the location of such obstacles and the proposed work,
promptly notify the LANL Construction Inspector and arrange for
relocations.

3.2 TRENCHING

A. Stake out all sprinkler head and valve locations. Prior to trenching,
the stake-out will be reviewed by the LANL Construction Inspector.

B. Excavate trenches for controlled slope of pipe to low points for
system drainage. Pitch piping to drains a minimum of 6 inches in each
100 feet. (0.5%). Make excavations of sufficient depth and width to
permit proper handling and installation of the pipe and fittings. Keep
trench free of water and clean trench of all soil, rocks, and debris
before installing pipe and fittings.

C. Excavate trenches to a depth of 2 inches below invert of pipe. Bed
the piping in 2 inches of sand or approved backfill material and extend
to a minimum of 2 inches over the top of pipe.

D. Provide 48 inch clearance between top of pipe and finish grade for
pressure lines, and 12 inches for non-pressure lines, except where
otherwise indicated on Drawings. When two or more irrigation pipes are
to be placed in the same trench, maintain a minimum of six inches
horizontal and vertical distance between the pipes.

E. Where existing pavement must be cut to install landscape irrigation
system, cut smoothly to straight lines 6 inches wider than trench.

1.  Sleeve pipe and wiring under sidewalks, roadways, or parking lots in
    Schedule 80 PVC pipe. Size pipe sleeves 2 inches larger interior
    diameter than outside diameter of pipe being sleeved.

2.  Repair or replace pavement cuts with equivalent materials and
    finishes.

3.3 INSTALLATION

A. Install materials and equipment in accordance with the
recommendations of the manufacturers of the materials and ASTM D 2774.

B. Point of connection for the irrigation system shall be in the
facilities equipment room after the backflow preventer.

C. Pipe:

1\. Install plastic pipe in accordance with the manufacturer's
recommended procedures. Carefully handle and store plastic pipe and
fittings under cover to avoid damage. Do not use damaged or dented pipe.
Replace any section of pipe found to be defective before or after laying
with sound pipe.

2\. Provide solvent-cemented joint plastic pipe and fittings using
solvents and methods recommended by the manufacturer of the pipe. Make
all connections between plastic pipe and metal valves or steel pipe with
screw fittings using plastic female adapters with a nonhardening pipe
dope applied to male threads. Make screwed connections with light wrench
pressure. Use solvent-cemented joints for main lines under continuous
pressure or pipes larger than 2-1/2 inches in diameter (nominal) with
PVC cement per ASTM D 2855.

3\. After piping is installed, but before outlets are installed and
backfilling commences, open valves and flush system with full head of
water.

4\. The full length of each section of pipe shall rest solidly upon the
pipe bed, with recesses excavated to accommodate elbows and joints. When
work is not in progress, temporarily cap open ends of pipe and fittings
to keep out foreign matter. To ensure a \"clean\" system, each joint of
pipe shall be held in an upright position to allow foreign objects to
fall out before the joint is added to the system.

D. Do not use saddle taps on irrigation lines. Make branches only with
fittings and reducers. Do not use bushings, street ells, or closed.

E.  Provide sprinkler heads as specified and install to grade. Use
    teflon tape or teflon sealer on threaded connection at heads and
    joints. Install head in the vertical position, hand backfilled and
    compacted to near original density. Maintain a 24 inch clearance
    from wall, buildings or windows. Install heads adjacent to walks and
    curbs abutting the walk or curb edge with top of head to be 1/2 inch
    below top of walk or curb. Adjust irrigation heads to insure proper
    watering of plant material.

F.  Install sprinkler heads, bubblers, and emitters up-slope of trees
    and shrubs at inside edge of depression so water will flow into the
    depression.

G. Install automatic drain valves on lateral lines only, at low points,
100 feet O.C. Install automatic drain valve 3 inches below top of gravel
drain sump. Gravel drain sump shall be one cubic foot of washed gravel,
with filter fabric completely surrounding gravel and automatic drain
valve.

H. Install automatic and manual control valves and valve boxes in
accordance with the recommendations of the manufacturer and as detailed
in Drawings. Wire each valve to a separate station on the controller.

I. Controllers shall be located on the exterior walls adjacent to the
facilities equipment room and the point of connection for the irrigation
system. Controller shall not be located in secure areas that require
special access. Mount and wire the controllers according to the
manufacturer's approved procedures and as specified. Connect controller
to a dedicated breaker on the power panel at the location noted.

J. Install control wire in same trenches as sprinkler main lines and
laterals wherever practical. Snake the wires in the trench to allow for
displacement of the wire during backfilling. Lay wires on the trench
bottom on one side of the pipe only. If wiring is not in the same trench
as piping, install in PVC minimum Class 160 piping and provide 12 inches
minimum cover. Securely tape together valve wires running in the same
trench at 10-foot intervals. Place the bundle of wiring to one side of
piping (east of north/south lines and north of east/west lines) and no
more than 3 inches from piping.

K. Keep wire splices to a minimum and if needed shall be made only in
common splice boxes located in valve boxes. Provide a slack-wire loop at
100 feet intervals and at each valve with enough slack so that wire
splices can be extended 24 inches above ground level to facilitate
testing and trouble-shooting. Do not use wire size smaller than No. 14
AWG.

L. Install 115 Volt AC wiring in accordance with the requirements of the
National Electrical Code. Service to controllers shall consist of one
black and one white and one green wire in rigid conduit. Electric
control lines from controller to automatic valves shall be a different
color from the 115 volt service from the valves to the controller. Each
wire from zone valves to controller shall be blue color for each station
on the controller. Wire to master control valve shall be red. The valve
common wire shall be white. All electrically operated devices and all
metal enclosures shall be connected to ground, as approved.

3.4 TESTING AND INSPECTION

A. Provide notification to LANL Construction Inspector 24 hours in
advance that work is in readiness for testing. Should work requiring
testing or approval be backfilled prior to LANL approval, the
Subcontractor, at the Subcontractor's expense, shall uncover, retest and
restore the surface.

B. Should any portion of the Work done or any materials delivered fail
to comply with requirements of the Specifications or Drawings, such work
or materials shall be rejected and shall be immediately removed from the
site or corrected satisfactorily.

C. Pressure test irrigation piping after laying and completing joints
and settings valves, but prior to backfilling. Calibrated pressure
gauges shall be used on the line being tested. Pressure test as follows:

1\. Center-load the pipe with a small amount of backfill to prevent
arching or slipping under pressure. Flush out all lines, then cap all
outlets and hydrostatically test the normally pressurized part of the
system at a pressure of 150 psig for 4 hours. Test lines between master
valves and remote control valves (where applicable) in the same manner
at a pressure of 100 psig for 4 hours.

2\. Test laterals (intermittently pressurized) in the same manner at
existing available static pressure. Leave joints exposed for inspection
during the pressure test. Do not install swing joints or flexible
nipples prior to pressure test. Maintain pressure tests for 4 hours. Do
not use air pressure test.

3\. If pressure loss occurs, affected line shall be repaired and tests
shall be repeated until the entire system has been proven tight. Conceal
lines passing hydrostatic pressure test the same day if nighttime
temperatures are to be 32 degrees Fahrenheit and below.

3.5 COVERAGE AND ADJUSTMENT

A. When the sprinkler system is complete, perform a coverage test to
determine if the water coverage for planting areas is complete and
adequate and that spray does not hit buildings, walks and other
locations where not required. Correct any inadequacies of coverage by
adjusting all heads and valves, and program controller to provide
optimum sprinkler system performance.

3.6 MAINTENANCE

A. Maintain and adjust the irrigation system in coordination with the
plant materials requirements until final acceptance by LANL maintenance
staff is achieved. Irrigation maintenance shall include repair,
replacement of parts not operating properly and adjustment of timing and
coverage of heads.

B. Prior to the acceptance of the project, furnish to LANL an irrigation
operation and maintenance manual and review the manual and its contents
with the LANL maintenance staff.

3.7 INSPECTION AND ACCEPTANCE

A. When work is completed, including maintenance, LANL will make an
inspection to determine acceptability.

B. Where inspected irrigation work does not comply with requirements,
replace rejected work and continue specified maintenance until
re-inspected and system is found to be acceptable. Remove rejected
equipment and materials promptly from project site.

END OF SECTION

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Do not delete the following reference information:

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FOR LANL USE ONLY

This project specification is based on LANL Master Specification 32 8400
Rev. 2, dated July 14, 2008.