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HomeMy WebLinkAbout2889-5r ce)g IRRIGATION SPECIFICATIONS . (f) Routing of control wires. PART 1 - GENERAL (g) Electrical service lines. (h) Sprinkler heads. 1.01 SCOPE (i) Lateral lines. (1) All work shall be performed by a contractor with a C-27 license or greater. The work required is indicated Related equipment (as may be directed). on the drawings and includes, but is not limited to new irrigation systems in medians and retrofitted (5) Maintain record drawings on site at all times. irrigation systems on each side of roadway, automatic controller, remote control valves, quick coupler valves, water connections, and electric connectiouL 1.05 GUARANTEE 1.02 CITY INSPECTIONS/TESTS A. It is the landscape contractors responsibility to contact theEngffieering Division Landscape Inspector, 48 hours prior to desired inspection of an item at extension (909) 350-6653. B. Prior tore of utilities or maintenance period commencement, the following inspections are required: - Construction of irrigation system in open trench condition (prior to backfill). Pressure test 150 PSI for a three (3) hour continuous period - An irrigation coverage test. - Planting, including street trees. Contact the Parks Planning and Landscape Development Section, Engineering Division for species and locations. - Finish grade prior to seeding. - Compliance with approved landscape plans. - Any special Conditions of Approval attached to project. - Final Inspection. C. The owner's representative and landscape contractor shall be present at this inspection. 1.03 MAINTENANCE GUIDELINES A. Landscape shall be maintained in a neat, clean, weed -fine and healthy condition. This shall include but not limited to: 1. Cultivation of planted beds at intervals (not to exceed ten (10) days 2. Regular mowing to maintain a lawn height not to exceed two (2)' inches (will vary with species). 3. Regular pruning of plants as necessary to control and direct growth. 4. Scheduled maintenance of irrigation controller to assure proper application rate of water necessary for proper plant growth. Drip irrigation may require specialized landscape maintenance care. 5. Immediate replacement of plant material as needed due to dead, disease, or lack of growth. 6. Fertilization on a regular schedule as 1.04 TURNOVER IRRIGATION ITEMS A. Controller charts: Provide one controller chart (of the maximum size the controller door will allow) for each automatic controller. The chart shall show the area covered by controller and be prepared from record drawings. B. Operation and maintenance manuals: Two individually bound copies of operation and maintenance manuals shall be delivered to the City. C. Supply as part of this contract the following items: (a) Two keys for each automatic controller. (b) One valve box cover wrench. D. Materials List: (1) Complete material list shall be submitted to the City's on-site Construction Manager prior to performing any work. Catalog data and full descriptive literature must be submitted whenever the use of items different than those specified is requested. (2) Material list shill be submitted using the following example: Item Description Manufacturer Model 1 Pressure Supply Lines Lasco Sched.40 2 Lawn Head Toro 570 -GP E. Record drawings for new systems: Contractor shall provide completed as -built drawings which shall be Mylar copies of the project plans and shall conform to the following: (1) Record accurately on one set of contract drawings all changes in the work constituting departures from the original contract drawings. (2) The changes and dimensions shall be recorded in a legible and workmanlike manner to the satisfaction of the Inspectors. Prior to final inspection of work, submit record drawings to Inspectors for approval. (3) Dimension from two permanent points of reference (walls, sidewalks, curbs, pavement, etc.). Data to be shown on record drawings shall be recorded day to day as the project is being installed. All lettering on drawings shall be a minimum of 1/8 inch in size. (4) Show locations and depths of the following items for new systems: (a) Point of connection for water and electrical (b) Routing of sprinkler pressure lines (dimenswa maximum 100 feet along routing). (c) Gate valves. (d) Sprinkler control valves. A. The entire sprinkler system, including all work done under this contract, shall be guaranteed by the Contractor against all defects, fault of material, and workmanship, for (1) one year from date of final inspection. B. The Contractor shall instruct the City's Representative in the operation and maintenance of the system and shall furnish a complete set of operating instructions. PART 2 - MATERIALS 2.01 GENERAL Materials and equipment installed or furnished that do not meet these standards will be rejected and shall be removed from the site at no expense to the City. 2.02 GALVANIZED STEEL PIPE AND FITTINGS (if applicable) A. All galvanized steel pipe shall be Schedule 40, threaded, coupled, and hot -dipped galvanized, and shall comply with the requirements of ASTM A120-66 or ASTM A53-67. B. All fittings for galvanized steel pipe shall be 150 pound rated galvanized malleable iron, banded ern. C. Pipe sizes indicated on the drawings are nominal inside diameter, unless otherwise noted. 2.03 BRASS PIPE AND FITTINGS A. Brass pipe and fittings to be I.P.S. standard weight, 125 UBS, 85% red brass, and are to be used as standpipes on backflow preventor. B. Where galvanized risers and/or fittings are required, a dielectric union shall be installed at connection point of galvanized and bronze material. 2.04 PLASTIC PIPE AND FITTINGS A. All plastic pipe shall bear the following markings: manufacturer's name, nominal pipe size, schedule or class, type of material, pressure rating in PSI, NSF seal of approval, and the date of extrusion. B. Presste supply lines 1 1/2 inches and smaller downstzearn of the backflow prevention unit shall be Schedule 40 PVC. Pressure supply lines 2" and larger shall be either Class 315 solvent weld PVC or Class 200 rubber gasket type PVC. Solvent weld and ring type pipe shall not be used together on the same pressure supply line. C. Non -pressure lines shall be Class 200 PVC. D. All fittings shall be standard weight Schedule 40 and shall be injection molded of an improved PVC fitting compound. Threaded plastic fittings shall be injection molded. E. All threaded nipples shall be standard weight Schedule 80 with molded threads unless otherwise specified. F. All solvent cementing of plastic pipe and fittings shall be a two-step process, using primer and solvent cement applied per the manufacturer's recommendations. Cement shall be of a fluid consistency, not gel -like or ropy. Primer and solvent shall be applied to BOTH mating surfaces. 2.05 BACKFLOW PREVENTION UNITS Backflow unit shall be as shown on the drawings. 2.06 VALVES A. Gate valves: (1) Gate valvas 2 inches or smaller shall have screwed joints and brass bodies. (2) All gate valves shall have a minimum working pressure of not less than 150 PSI and shall conform to AWWA. B. Remote control valves: Valves shall be as shown on the drawings. Connect the cootrolkx in the operating soo�enoe indicated on the drawings. 2.07 VALVE BOXES A. Valve boxes shall be fabricated from a durable, weather resistant plastic material, resistant to sunlight and chemical action of soils. B. The valve box cover shall be secured with a hidden latch mechanism or bolts. C. The cover and box shall be capable of sustaining a load of 1,500 pounds. D. Valve box extensions shall be by the same manufacturer as the valve box. E. Gate valve boxes shall be round plastic boxes with bolt -down covers marked "GATE VALVE". F. Remote control valve boxes shall be rectangular plastic boxes with bolt -down covers marked with the valve identification number stenciled in 2 -inch -high letters/numbers using epoxy resin base paint of a contrasting color. 2.08 AUTOMATIC CONTROLLER Automatic controllers shall be as indicated on the drawings complete with hookup to electrical sources. All controllers shall be enclosed in a vandal -resistant, waterproof enclosure, LeMeur or approved equal, or as shown on the drawings. All wiring from electrical meter to pedestal moat controller to be underground and sleeved through concrete pads. 2.09 ELECTRICAL - PRIMARY A. All electrical equipment shall be NEMA Type 3, waterproofed for exterior installations. B. All electrical work shall conform to local codes and ordinances. Above ground wires shall be conduit enclosed. 2.10 WIRING - LOW VOLTAGE A. Remote control wire shall be direct -burial AWG -UF type, #14 size according to manufacturers specifications. B. Connections shall be either epoxy -sealed packet -type or Scotch Lock connectors. C. Ground wires shall be white in color. Control wires shall be of same color far a given controller. Where more than one controller occupies a single trench, each controller shall have different color control wires. 2.11 SPRINKLER HEADS Sprinkler heads shall be as indicated on the drawings. Anti -Drain valves (or equal) to be installed as required for elimination of low head drainage. 2.12 IRRIGATION SLEEVES Irrigation sleeves shall be SCH 40 PVC. Size shall be two times (2x) size of pipe, electrical wiring and pipes to be sleeved separately. Sleeving required uuder all paved surfaces. 2.13 SENSOR SYSTEM A. The sensor system shall be as indicated on the drawings. It shall consist of three main analog components: Control Module, Switch Module and Probe. B. The sensor system shall have an operating temperature range of -40 degrees Centigrade to 100 degrees Centigrade. PART 3 - EXECUTION 3.01 GENERAL INSTALLATION A. Water Supply: Connections to proposed water meter (meter installation by others) shall be at the location shown on the drawings. Minor changes caused by actual site conditions shall be made at no additional cost to the City. B. Layout: Layout irrigation systems and make minor adjustments required due to differences between site and drawings. Where piping is shown on drawings under paved areas, but running parallel and adjacent to planted areas, install the piping in the planted areas. C. Diagrammatic Intent: The drawings are essentially diagrammatic. The size and location of equipment and fixtures are drawn to scale where possible. Provide offsets in piping and changes in equipment locations as necessary to conform with structures and to avoid omens or conflicts with other work. D. Grades: Before starting work, carefully check all grades to determine that work may safety proceed, keeping within the specified material depths with respect to finish grade. E. Inspection: (1) Prior to all work of this section, carefully inspect the installed work of all other trades and verify that all such work is complete to the point where this installation may properly commence without conflicts. (2) Verify that the irrigation system may be installed in strict accordance with all pertinent codes and regulations, the original design, the referenced standards, and the various manufacturer's recommendations. (3) Verify PSI prior to any work. Contact Landscape Architect if pressure varies from that indicated on plans. F. Discrepancies: Do not proceed with installation in areas of diiscrepauCy until all ducn;pencidsi have beet resolved. G. Field Measurements: Make all necessary measurements in the field to ensure precise !it of items in accordance with the original design. 3.02 TRENCHING A. Contractor shall notify UNDERGROUND SERVICE ALERT (800) 422-4133 at least two (2) working days before begin to dig. B. Dig trenches and support pipe continuously on bottom of ditch. Lay pipe to an even grade. Trenching excavation shall follow layout indicated on drawings to the depths below finished grade and as noted. C. Tree roots shall be protected. Cut no roots over 1/2" diameter. Reroute pipe above or below all roots. Preservation of all roots to take precedence over pipe depth requirement. All trenching to maximize distance from existing mature trees. Hand digging is required where trenching might impact existing tree roots. D. Provide minimum cover of 30 inches over pressure supply lines under paved areas. E. Provide minimum cover of 18 inches over pressure supply lines 2 1/2 inches and smaller. F. Provide minimum cover of 18 inches over control wires. G. Provide minimum cover of 12 inches over non -pressure lines. 3.03 BACKFILLING A. Initial backfill on all lines shall be of fine granular material with no foreign matter larger than 1/2 inch in size, 6" above pipe. B. Backfill shall be tamped in 4 -inch layers under the pipe and uniformly on both sides for the full width of the trench and the full length of the pipe. Materials shall be sufficiently damp to permit thorough compaction, free of voids. Backfill shall be compacted to dry density equal to adjacent undisturbed soil and shall conform to adjacent grades. C. Flooding in lieu of tamping is not allowed without specific prior approval. D. Under no circumstances shall truck wheels be used to compact soil. E. Provide sand backfill a minimum of 6 inches over and under all piping under paved areas. 3.04 PIPING A. Piping under existing concrete pavement must be installed in sleeves 2 1/2" x diameter. No hydraulic driving is permitted under any concrete pavement. B. Cutting or breaking of existing pavement is not permitted without written permission from the Owner. C. Install pipe with all marking up for visual inspection and verification. D. Remove all dented and damaged pipe sections. E. Contractor shall install concrete thrust blocking at all changes of direction and tanninil points of pressure pipe. F. All lines shall have a minimum clearance of 4 inches from each other and 6 inches from lines of other trades. G. Parallel lines shall not be installed directly over one another. H. Make all joints in strict accordance with the manufacturer's recommended methods; allow solvent welds at least 15 minutes setup time before moving or handling and 24 hours curing time before filling. I. All threaded plastic -to -plastic connections shall be assembled using Teflon tape. J. For plastic -to -metal connections, use non -hardening pipe dope on all threaded plastic -to -metal connections, except where noted otherwise. K. Piping shall be snaked from side to sidle in trench bottom to allow for expansion and contraction. 3.05 ASSEMBLIES A. Install all assemblies specified herein according to the respective detail drawings or specifications, using best standard practice. B. Install backflow assemblies in shrub areas and/or adjacent to other hardscape items rather than turf areas, when possible, and at height required by local codes. C. Valves shall be installed in shrub areas whenever possible. D. Each valve box shall be installed on a foundation of pea gravel, backfill one cubic foot mum. Valve boxes shall be installed with their tops one inch above the surface of surrounding finish grade in shrub area, and flush with turf areas. 3.06 CONTROLLER A. Controller shall be located by Inspector, and placed behind shrubs and/or adjacent to other hwdscWe items. Maintenance access shall be provided. B. The irrigation system shall be programmed to operate during the periods of minimal use of the design area and at time of least evaporation and wind turbulence, generally 2:00 A.M. to 6:00 A.M. C. The controller shall be programmed so that each valve operates separately. 3.07 WIRING A. Wiring shall occupy the same trench and shall be installed along the same route as the pressure supply lines wherever possible. B. Where more than one wire is placed in a trench, the wiring shall be taped together at intervals on 12 feet. C. All connections shall be of an appzovtype and shall occur in s valve box. Provide an 18 inch service loop at each connection. r D. An expansion loop of 12 inches shall be provided at each wire connection and/or directional turn, and one of 24 inches shall be provided at each remote control valve. E. A continuous run of wire shall be used between the controller and each remote control valve. Under no circumstances shall splices be used without prior approval. F. Wire running from controller to control valves shall be AWG -UF 600V, No. 14 minimum, solid core, single conductor copper wire, and style Br. (direct burial type). G. Spare control wires shall be ran to valve box locations as shown on the plans. Provide an 18 inch expansion loop at valve box. 3.08 FLUSHING THE SYSTEM A. Prior to installation of sprinkler heads, the valves shall be opened and a full bead of water used to flush out the lines and risers. B. Sprinkler heads shall be installed after flushing the system has been completed. 3.09 SENSOR SYSTEM A. The sensor system shall have one or more soil moisture sensors connected to the time clock. B. The system shall have one or more Control Modules per time clock and one Switch Module/Probe per designated valve, and will use irrigation wiring. C. The Switch Module shall be wired to the existing solenoid wines and hardwired to the probe, and allow switch of use of time clock wires from power of valve to part of Sensor System. Operate on 20-35 VAC 50-60 HZ. D. The Control Module shall have an interface board built into device to allow use of existing station time clock wires as an extension of probe wires back to time clock location. This interface board will also allow grouping of valve/landscape areas together through on common wire, to allow one field sensor to control several valves. Operate on 115 VAC 50 to 60 HZ., and have either normally open or close relay contacts. E. The control module shall compensate for the presence of salts and fertilizers. It shall not require re -calibration or over -ride of system when not fertilizing. The Control Module shall not require any down time field maintenance. F. The Probe shall be constructed of 100% non-metallic components. 3.10 SPRINKLER HEADS A. Sprinkler heads shall be installed as designated on the drawings. B. Spacing of heads shall not exceed maximum indicated on the drawings or in manufacturer's directions. C. Head height in relation to finish grades shall be as indicated on the drawings at the time of completion. 3.11 ADJUSTING THE SYSTEM Contractor shall adjust valves, align sprinkler heads of each system to maximize coverage to 100% and minimize overspray prior to planting. 3.12 IRRIGATION SLEEVING A. Provide minimum cover of eighteen (18) inches on irrigation sleeves to be provided under all paving. B. See 3.02 (TRENCHING) and 3.03 (BACKFILLING) for fiuther information. 3.13 COMPLETION CLEANING Upon completion of work, Contractor shall smooth all ground surfaces; remove excess materials, rubbish, debris, etc.; sweep adjacent streets, curbs, gutters, walkways, and trails; and remove construction equipment from the premises. t� _ ' A 4 U Z O� 0 � H b.18 � - 14 La w Wahl.. i4 i!. . l�wG.�?B84 DATE: 7/17/2000 JOB NO.: 99-36 DRAWN BY: S.J.R. REVISIONS: SHEET NUMBER: S OF: 6 A Z O� � H U � U A �-4 w a �a UA 00 � 0 04 0 U ;7y W �5 W � 0 O � � V CA 04 U A o 9 O W a ME-4UW l�wG.�?B84 DATE: 7/17/2000 JOB NO.: 99-36 DRAWN BY: S.J.R. REVISIONS: SHEET NUMBER: S OF: 6 Z O� � H U � U A �-4 w a l�wG.�?B84 DATE: 7/17/2000 JOB NO.: 99-36 DRAWN BY: S.J.R. REVISIONS: SHEET NUMBER: S OF: 6