HomeMy WebLinkAbout02810.pdf BICKFORD OF CARMEL, IN 12/12/2012
UNDERGROUND IRRIGATION 02810-1
SECTION 02810 - UNDERGROUND IRRIGATION
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 1 Specification Sections, apply to this Section.
1.2 SUMMARY
A. Scope of work: Furnish and install the complete underground irrigation system specified herein from
point-of-connection throughout site; including labor, materials, equipment, apparatus, and services for
the testing, adjusting, retesting and readjusting as required to place the system in an approved
operating condition. The irrigation system shall include the design and installation of the following:
1. Piping
2. Meter and backflow assembly
3. Sprinkler heads
4. Valves and valve boxes
5. Controllers
6. Control wiring
7. Fittings
8. Electrical connections
9. Quick-couplers
10. All other necessary accessories
11. System Manuals
12. Instructional walk-through with Owner
B. Limits of work: Area within project limits as delineated on the irrigation identification plan.
C. Related Sections: The following Sections contain requirements that relate to this Section:
1. Section 02318 – Excavating, Backfilling & Compaction
2. Section 02900 – Landscaping
1.3 QUALITY ASSURANCE
A. Irrigation contractor must have technical qualifications, experience, trained personnel and facilities to
perform the specified work and have been engaged in sprinkler design and installation, of systems of
similar size and scope, for at least five (5) years. Irrigation Contractor shall have completed a project
of similar size and scope within the past three (3) years.
B. Quality Control Criteria:
1. Provide irrigation products as described in this specification and according to manufacturer’s
specifications.
2. Comply with requirements of for prevention of backflow and backsiphonage.
3. Comply with requirements for plumbing and other regulations affecting site irrigation.
4. Comply with National Plumbing Code, National Electric Code, and applicable city or state
codes.
1.4 SUBMITTALS
A. General: Submit the following according to the Conditions of the Contract and Division 1
Specification Sections.
B. Submit manufacturer's literature, technical data, and recommendations for the system as specified
including:
1. Pipe
2. Fittings
BICKFORD OF CARMEL, IN 12/12/2012
UNDERGROUND IRRIGATION 02810-2
3. Sprinkler heads
4. Valves
5. Controller
6. Backflow preventer
7. Wiring
8. Valve boxes
C. Shop Drawings:
1. Design and submit an irrigation layout plan based on the Irrigation Identification Plan. The
plan shall include the following information:
a. Point-of-connection to existing services.
b. Main and lateral pipe routing, size and sleeve locations and size under pavement.
c. Sprinkler head layout, size, radius, and sprinkler head coverage.
d. Zone Labels indicating valve sizes, GPM and locations.
e. Component, control system and wiring diagram showing routes and sizes.
f. Location and mounting details of controller.
g. Irrigation details.
h. Friction loss calculations for each zone.
2. Submit four (4) hardline sets of shop drawings and an electronic copy (AutoCAD release 2008
or newer).
3. Do not begin construction work until shop drawings have been approved.
D. Closeout Submittals – Submit the following:
1. As-built drawings: Following construction of system, submit two (2) reproducible hardline sets
of as-built drawings and an electronic copy (AutoCAD release 2008 or newer).
E. Submit color-coded print of controller chart.
1.5 JOB CONDITIONS
A. Contractor shall carefully examine the work site, local conditions, specifications and plot plan for any
existing conditions and limitations that may apply to the work. Submission of a proposal shall be
considered evidence than an examination has been conducted.
B. Utilities: Determine location of utilities and perform work in a manner which will avoid possible
damage. When necessary the Contractor shall make any minor adjustments in location or alignment
of the new work. Hand excavate, as required. Maintain grade stakes set by others until removal is
mutually agreed upon by parties concerned. Contact Architect if potential conflicts are apparent.
1.6 SEQUENCING AND SCHEDULING
A. Schedule and coordinate to facilitate the most expeditious completion of the project in a workmanlike
manner.
B. Consult all other relevant specification sections to determine the extent of work specified elsewhere
but related to that included herein.
C. Schedule and coordinate all required irrigation utility connections with other project trades and/or
utility companies.
D. Obtain information pertaining to location of all proposed lines and accessories prior to irrigation
installation.
E. Contractor shall assume responsibility for locating all site utilities, and perform work in a manner to
avoid damage.
1.7. PROTECTION OF EXISTING CONDITIONS
A. Any existing structures, equipment, utilities, pavement, landscaping, etc., damaged by Contractor
during the course of the work including any subsequent damage caused by leakage or settling of
piping shall be restored at Contractor's expense.
BICKFORD OF CARMEL, IN 12/12/2012
UNDERGROUND IRRIGATION 02810-3
1.8 HANDLING
A. Deliver irrigation system components in manufacturer’s original undamaged and unopened containers
with labels intact and legible.
B. Deliver plastic piping in bundles, packed to provide adequate protection of pipe ends, both threaded
and plain. Pipe and accessories shall be handled in such manner as to ensure delivery to the trench
in sound, undamaged condition. Before installation, the pipe shall be inspected for defects. The
interior of pipe and accessories shall be thoroughly cleaned of foreign matter before being lowered
into the trench and shall be kept clean during laying operations by plugging or other approved method.
C. Store and handle materials to prevent damage and deterioration.
D. Provide secure, locked storage for valves, sprinkler heads, and similar components that cannot be
immediately replaced to prevent installation delays.
E. Manufacturer’s Specifications: The latest printed specifications of approved manufacturer of materials
shall become part of these specifications.
1.9 DESIGN CRITERIA / PERFORMANCE
A. Prior to design of the irrigation system, the contractor shall perform water pressure tests at the site to
determine available volume and dynamic pressure. If water pressure and/or volume appear
inadequate, reasonable measures such as a booster pump shall be included in system design as part
of the bid. If a pump is required only VFD controlled pump solutions will be accepted. If, in the
opinion of the bidder, extra-ordinary measures are needed to adequately serve the intended irrigation
system, the bidder shall notify the Engineer immediately. Submission of a proposal shall be
considered evidence that any water source issues are adequately addressed for proper system
performance.
B. The sprinkler system shall cover all landscaped areas and shall be designed to avoid overspray onto
paved areas. The sprinkler system shall be completely underground and automatic, capable of
providing complete coverage of the area to be irrigated.
C. Irrigation system shall provide 100% coverage for all irrigated areas.
D. Pipe sizes, valve sizes, and zone operation schedule shall provide an economic and efficient system.
E. In sizing lines, allow for pressure loss due to meters, valves, backflow preventer, pipe and fittings,
elevation change and all applicable factors. Flow velocities for all lines shall not exceed five (5) feet
per second. Pressure available at each head shall be at least the minimum specified by the
manufacturer, and shall not exceed the maximum.
F. Seasonal Drainage: The seasonal drainage shall be done by the “Blow-out method” (replacing water
with compressed air. The blow-out connections shall utilize a 1” Quick-Coupling valve.
G. Reduced Pressure: Backflow Preventers shall be installed if existing is not sufficient. The contractor
shall be responsible for determining the correct size and type of equipment needed to comply with
local regulations and include this in the calculations for the design of the sprinkler system.
H. Provisions for winterization of the system shall be included in the design.
I. Provide separate zones for each of the following:
1. Lawn areas.
2. Shrub, Groundcover beds
3. Annual beds.
4. Areas of different exposures
J. Sleeve all irrigation lines below paving with Class 200 PVC. Sleeving shall be at least two sizes larger
than pipe contained. Sleeving shall extend at least 12” beyond edge of paving and marked with an
iron post. Wire shall be placed in a separate sleeve, minimum of 1 ½” Class 200 PVC. Design the
system to minimize the amount of main lines below pavement.
1.10 EXTRA MATERIALS
A. Provide extra materials as follows:
1. Two extra sprinkler heads of each type and size.
2. Two valve keys for manual valves
BICKFORD OF CARMEL, IN 12/12/2012
UNDERGROUND IRRIGATION 02810-4
3. Two valve box keys.
4. Two keys for valve markers.
5. Two wrenches for each type head core and removing and installing each type head.
PART 2 - PRODUCTS
2.1 MAIN LINE
A. Piping on pressure side of irrigation control valves:
1. Polyvinyl chloride (PVC) 1120-1220, SDR 21 Class 200, and conform to ASTM standards D2241-
05 & D2672 or latest revision. Materials shall conform to all requirements of D1784, or latest
revision.
2.2 LATERALS
A. Piping on non-pressure side of irrigation control valves:
1. Polyvinyl chloride (PVC) 1120-1220, SDR 21 Class 200, and conform to ASTM ASTM standards
D2241-05 & D2672 or latest revision. Materials shall conform to all requirements of D1784, or
latest revision.
2. Pipe 1-1/4" and smaller pipe may also be flexible non-toxic polyethylene pipe made for 100%
virgin material meeting N.S.F. (National Sanitation Foundation) standard #14 for use in pressure
potable water applications, for 800 design stress. All sizes shall have a minimum 100 P.S.I.
working pressure rating. All polyethylene pipe shall be continuously and permanently marked
with the manufacturer's name, material, size, and schedule. Pipe shall conform to A.S.T.M.,
D2239, and D1248 (3C5PE34) or latest revision.
2.3 FITTINGS
A. Solvent welded socket fittings conforming to ASTM D 2467 (Schedule 80 PVC) and ASTM D 2466
(Schedule 40 PVC). Threaded type fittings shall conform to ASTM D 2464 (Schedule 80 PVC).
Solvent cement shall conform to ASTM D 2564. Risers for rotary or gear driven sprinkler heads shall
be 3/4" Flexible PVC, manufactured by AG Products, Sun Valley, CA or approved equal. Burst
strength of fittings shall equal or exceed that of the pipe on which they are installed.
2.4 SPRINKLER HEADS
A. Sprinkler heads shall be provided by HUNTER or RAIN BIRD:
B. Sprayheads: Provide 6" pop-up (Pressure compensating with check valve) in lawn areas and 12" pop-
up (pressure compensating with check valve) in planting beds. Spray heads shall consist of heavy-
duty plastic body, with interchangeable nozzles, pressure activated, multi-function no-flow wiper seal,
ratcheting riser for quick arc alignment, heavy duty spring and “pull-ring” flush plug design. Full and
part circle spray heads shall have matched precipitation rates. Spray heads shall include internal
drain check valve for preventing low head drainage. Adjustable nozzles are only allowed in “odd
angle” applications all others shall be fixed arc.
C. Gear Driven Rotary Heads: Provide 6” pop-up. Sprinkler case shall be of heavy-duty plastic
construction with plastic or rubber cover with a pop-up height of 6", FloStop Control, Easy arc
Adjustment 40-360 degrees, Water lubricated gear drive, extra strong spring and Drain check valve
for up to 10’ of elevation change. Match the recipitation rates between full circle and part circle heads
when valved together in the same zone. Nozzles shall be interchangeable.
BICKFORD OF CARMEL, IN 12/12/2012
UNDERGROUND IRRIGATION 02810-5
2.5 CONTROL VALVES
A. Remote control valves shall be HUNTER ICV or Rain Bird PEB:
B. Valves shall have Heavy-duty solenoid, High grade construction (150psi rating), Internal manual
bleed, Flow control with non-rising handle, Rigid diaphragm support, Globe and angle configurations,
Captive bonnet bolts and solenoid plunger and pressure regulator compatible.
2.6 CONTROLLERS
A. The automatic electronic controller shall be universal ‘remote-ready’ as manufactured by HUNTER or
Rain Bird. Controller shall have the capacity of 5 stations more than required.
B. Each controller shall be equipped with remote receiver and transmitter. The controller shall be of a
versatile modular design, have a minimum of 4 fully independent programs, independent day
schedule options for each program, non-volatile 100 year memory, programmable pump circuit by
station, Cycle and Soak capability by station and remote control ready, and operate from a
conventional 115-volt service. The controller shall be installed and wired in accordance with the
manufacturer’s published instructions. Controllers mounted outside shall be either wall mounted or
installed with Optional metal pedestal.
C. Controller shall be decoder controller on systems requiring 30, or more, individual stations. Only
single station decoders will be accepted.
D. The exact location shall be negotiated between the Owner and Architect while still adhering to the
manufacturer’s recommendations.
2.7 QUICK-COUPLING VALVES
A. Provide quick coupling valves at locations that allow access to any landscaped area with a 50' length
hose.
B. Provide five (5) valve keys fitted with 3/4" swivel hose cells.
C. Quick Coupling Equipment:
1. Valves: One-piece body constructed from heavy-duty cast bronze with a 1" FIP riser
connection.
2. Quick Couplers: Single lug coupler of heavy cast bronze and detachable handle.
3. Swivel Hose ELL: Heavy cast bronze, connected to quick couplers for hose connection. Hose
ells 1" FIPX 1" Male Hose Threads.
4. Each quick coupler should be installed in a valve box by Ametek (or approved equal) and packed
with pea gravel, 4" in depth.
2.8 VALVE BOXES
A. Provide box and cover, with open bottom and openings for piping; designed for installing flush with
grade. Include size as required for valves and service. The box shall be of plastic construction
with UV protection. Boxes shall be vandal resistant including lockable lid. Permanently label valve
box cover, brass or stainless steel tags, with zone number. Box and lid assembly color shall be
green color.
B. Accepted manufacturer: Carson – Access Boxes or approved equal.
2.9 CONTROL WIRE
A. Copper with UL approval for direct burial in the ground, size No. 14-1 minimum. Common ground
wire shall have a white insulating jacket; control wires shall be a color other than white. All wires
place for future use to be of different color than in-use power wires. All wire splices shall occur in a
valve box. Splices shall be made with waterproof connections – 3M DBY-6 and DBY-6 wire
connectors.
B. Follow manufactures recommendations while still adhering to minimum wire sizing.
BICKFORD OF CARMEL, IN 12/12/2012
UNDERGROUND IRRIGATION 02810-6
2.10 BACKFLOW PREVENTER
A. Reduced pressure backflow preventer shall be installed in accordance with local codes, and
adequately sized for the irrigation system.
2.11 RAIN SENSOR
A. Rain sensor shall cut power supply between timer-controller and 24V solenoid valves after rainfall
quantities of 1/8", 1/4", 1/2", 3/4" or 1". Sensor shall be accurate to within + 1/1 6" and will restore
power after 2-20 hours, depending on conditions. U.L. listed switch rating of 10.1 amps, 1/4 H.P. at
125/250 VAC.
B. The device shall be mounted in a location unobstructed by walls, trees, or other hindrances (as not to
be vandalized). The sensor shall be located as directed by Architect.
2.12 FREEZE SENSOR
A. Freeze sensor shall keep irrigation system from operating during freezing or near freezing
temperature. Sensor shall have a temperature set point of 4EC + 3EC (39EF) and a temperature
differential of + 1EC. The freeze sensor shall have an electrical rating of 24 VAC 6 amps. Bracket
and housing material shall be 6063 aluminum. Location of sensor shall be as directed by Architect.
PART 3 - EXECUTION
3.1 LAYOUT
A. Inspection: Examine existing elevations and conditions of site. Do not begin system design until all
existing conditions are satisfactorily understood.
B. Design Pressure: Verify at connection to water supply. Actual working pressure in an individual zone
shall fall between manufacturer’s recommended minimum and maximum operating pressures for the
last sprinkler head in the zone.
C. Design Velocities: Velocity of water in sprinkler system should not exceed 5 fps.
E. Backflow Preventer: Install reduced pressure backflow prevention valve, pump, booster pump, fittings
and accessories required to complete the system. Provide union on downstream side. Install in
accordance with local codes, and adequately sized for the irrigation system.
F. Meter: The Contractor shall determine if a separate water meter is required for this irrigation system.
The Contractor shall determine the size needed for the system design and install according to local
standards. The approximate location of this meter shall be determined by the Architect. Prior to
system design, verify potential point-of-connection with Architect.
G. Zoning of Irrigation System: Individual zones shall be designed so that total GPM required for zone
does not exceed available GPM. System shall be designed so that areas irrigated by individual zones
exhibit compatible conditions, including soil type, plant material type and sun exposure. System shall
be designed so that sprinkler head types and precipitation rates of sprinklers are compatible on the
same zone. System shall not have spray heads on the same zone as rotors.
H. Coverage: Full and complete coverage is required, make necessary adjustments to layout required to
achieve full coverage of irrigated areas at no additional cost to the Owner.
I. Connections: Where connections to existing stubouts or sleeves are indicated, make necessary
adjustments in layout to connect should stubs or sleeves not be located exactly where shown. Adjust
layout as necessary to install around existing work.
J. Pipe Routing: Where piping is shown under paved areas but running parallel and adjacent to planted
areas, install piping in planted areas. Do not install directly over another line in same trench.
K. Control Valves: Do not locate control valves in swales where water will be directed into the valve box.
Relocate valve as required.
BICKFORD OF CARMEL, IN 12/12/2012
UNDERGROUND IRRIGATION 02810-7
3.2 EXCAVATING AND TRENCHING
A. Perform excavations as required for installation of work. Restore all surfaces, existing underground
installations, etc., damaged or cut as a result of the excavations, to their original condition.
B. Dig trenches wide enough to allow a minimum 6" between parallel pipelines. Trench sufficient depth
to provide minimum cover (18” for all main lines and 12” for all laterals) from finish grade as shown on
drawings.
3.3 SLEEVING
A. Install sleeves where control wires and pipes pass through or under walls.
B. Install sleeves for control wiring and pipe under walks and paving.
C. Sleeves to be provided and extend a minimum of 12" beyond edges of walls, walks, and paving.
D. Mark the sleeve ends with an iron post.
E. Place wires in separate sleeve (1 ½” minimum).
F. Coordinate sleeve installation with other trades as required.
3.4 PIPE INSTALLATION
A. Install pipe in accordance with manufacturer's instructions.
1. Solvent-weld PVC pipe and fittings, using primer, solvents, and methods recommended by
manufacturer, except where screw connections are required. Clean pipe and fittings of dirt and
moisture before assembly. Snake pipe from side to side of trench bottom to allow for expansion
and contraction. Make all connections between PVC pipe and metal valves or pipe with threaded
fittings using PVC male adapters.
2. Gasket type PVC pipe required on main line sizes 4” and larger.
3. Use Teflon tape only on threaded joints, plastic to plastic and/or plastic to metal. Assemble
threaded PVC fittings finger-tight plus one to two turns - no more.
B. Install thrust blocks on main lines (larger than 3”) at locations that make a change of direction.
C. Avoid following piping layout situations:
1. Avoid piping layout along sides of structures.
2. Avoid odd angles in piping layout.
3. Avoid unbalanced friction losses.
4. Avoid high friction losses.
5. Avoid excessive trenching.
3.5 SPRINKLER HEADS
A. Location of Sprinkler Heads: Begin sprinkler head design at areas to be bordered (i.e. back-of-curb,
walks, building, etc.). Sprinkler heads adjacent to back-of-curbs shall be located 6” off of curb edge
as to prevent damage to head. Fill-in bordered areas with sprinklers. Design for 100% radius (head-
to-head) overlap coverage. When possible locate sprinkler heads based on triangular spacing. When
possible, locate sprinkler heads so that trees are approximately halfway between heads. Sprinkler
heads and quick coupling valves shall be installed perpendicular to grade and level with terrain,
unless otherwise indicated. Do not spray buildings or sidewalks.
B. All risers to heads shall be constructed of nipples or elbows to permit height adjustment of head.
C. All heads with 1” or larger inlet shall be installed on manufactured swing joints – 10” minimum.
3.6 ZONE VALVES
A. Remote Control Valves: Install control valves in valve boxes where shown and group together where
practical. Place no closer than 12" to walk edges, buildings, and walls. Set valve boxes flush with
finish grade.
3.7 CONTROLLERS
BICKFORD OF CARMEL, IN 12/12/2012
UNDERGROUND IRRIGATION 02810-8
A. Install per local code and manufacturer's instructions.
B. Connect remote control valves to controller in clockwise sequence to correspond with station setting
beginning with Stations 1, 2, 3, etc.
C. Affix a non-fading copy of irrigation diagram to cabinet door. Irrigation diagram to be sealed between
two sheets of 20 mil (min.) plastic. Irrigation diagram shall be a copy of the as-built drawing and shall
show clearly all valves operated by the controller, showing station number, valve size, and type of
planting irrigated.
D. Exact field location of controllers to be verified before installation. Coordinate the electrical service to
these locations.
E. Mount controller as to allow ease of programming and viewing – provide angle bracket when
necessary.
F. Provide a Freeze Sensor and Rain Sensor for each controller; coordinate locations with Architect.
3.8 CONTROL WIRING
A. Install control wires with sprinkler mains and laterals in common trenches wherever possible. Lie to
the side of pipeline and tie wires in bundles at 10' intervals and allow Slack for contraction between
ties. Provide one control wire per zone.
B. Provide a minimum of 3' of looped extra ground and control wire at each valve and at 200' intervals on
long wire runs. Snake wires in trench to allow for contraction of wires.
C. Control wire splices at remote control valves to be crimped and sealed with 3M DBR-6 or 3M DBY-6
wire connectors only.
3.9 FLUSHING AND TESTING
A. Cap or plug all openings as soon as lines have been installed to prevent entrance of materials that
would obstruct the pipe. Leave in place until removal is necessary for completion of installation.
B. Thoroughly flush out all water lines before installing heads, valves, and other hydrants.
C. Testing: All instruments, equipment, facilities, and labor required to conduct the tests shall be
provided by Contractor. Piping shall be tested hydrostatically before backfilling and proved tight at a
hydrostatic pressure of 100 psi without pumping for a period of one hour with an allowable pressure
drop of 5 psi. If hydrostatic pressure cannot be held for a minimum of 4 hours, Contractor shall make
adjustments or replacements and the tests repeated until satisfactory results are achieved and
accepted by the Owner.
D. Upon satisfactory completion of testing, complete assembly and adjust all heads for proper arc and
radius.
3.10 BACKFILL AND COMPACTING
A. After system is operating and required tests and inspections have been made, backfill excavations
and trenches with clean soil, free of rubbish.
B. Backfill for all trenches, regardless of the type of pipe covered, shall be compacted to minimum
95% density under pavements, 85% under planted areas.
C. Compact trenches in areas to be planted by thoroughly flooding the backfill. Jetting process may
be used in those areas.
D. Dress off all areas to finish grade.
3.11 CLEANUP
A. Keep areas of work clean, neat, and orderly at all times. Keep paved areas clean during installation.
Clean up and remove debris from the entire work areas prior to final acceptance.
B. Protect irrigation system and materials from damage due to performance of work, operations by other
contractors, trades and trespassers. Maintain protection during installation and testing period.
BICKFORD OF CARMEL, IN 12/12/2012
UNDERGROUND IRRIGATION 02810-9
C. The Contractor shall be responsible for all damage caused by his operations to trees, shrubs, curbs,
paving, structures, utilities, etc., on the site or adjacent to the site of the work and shall repair, replace
or otherwise make good any damage caused by their work.
D. The Contractor shall check the system two weeks after acceptance and four weeks after acceptance.
The Contractor shall drain the system in the fall following installation, turn it on and completely
checking the entire system in the spring following installation.
PART 4 - ACCEPTANCE
4.1 ACCEPTANCE
A. Demonstrate operation of all irrigation zones for the Architect. All irrigated areas are to have 100%
coverage. Contractor shall add additional heads, as necessary, at no cost to the Owner. Adjust all
heads as required for proper operation, alignment, elevation, radius, and arc.
B. A field training course shall be provided for designated operating and maintenance staff members.
Training shall be provided for a total period of up to 4 hours of normal working time and shall start
after the sprinkler system is functionally complete. Field training shall cover all of the items contained
in the operating and maintenance manuals.
C. The Contractor will provide on-site consultation with the Owner's operating personnel for a period of 6
months, not to exceed 4 hours per month, at no cost to the Owner. This consultation will be provided
at the Owner's request.
4.2 GUARANTEE
A. The entire sprinkler system will be unconditionally guaranteed against defects in material and
workmanship, including settling of backfilled areas below grade and adjusting heads to proper level
for a period of one year from date of acceptance.
B. In addition to minor adjustments, any defective electrical controls, valves, sprinkler heads or other
working parts will be repaired or replaced without cost to the Owner for a period of one year from date
of acceptance.
C. Damage by other during the one-year guarantee period will be the Owner’s responsibility.
4.3 RECORD INFORMATION
A. Furnish record drawings of the complete irrigation system.
B. Record Drawings and Controller Chart:
1. Provide a complete set of up-to-date as built drawings, and an electronic copy (AutoCAD release
2008 or newer).
2. Prepare a controller chart showing:
a. Location of all sections, valves, lateral lines, and routes of control wires.
b. Identify all valves as to size, station, number, and type of irrigation.
c. Provide chart as a black-line print with a different color used to show area of coverage for
each station.
d. Locate chart inside controller door. Seal chart between two pieces of plastic.
e. Complete chart and receive approval prior to final inspection of irrigation system.
END OF SECTION