Revised 2009_1231-Specs.pdf

NOAA – La Jolla Laboratory Replacement October 9 December 23, 2009 Final Construction Documents

TABLE OF CONTENTS 00010 - 1

DIVISION 0 – BIDDING AND CONTRACTING REQUIREMENTS

CONSTRUCTION AGREEMENT (NOT INCLUDED) (Amendment 2) GEOTECHNICAL REPORT (NOT INCLUDED) (Amendment 2)

CERTFICATES OF COMPLIANCE

SECTION 00010 - TABLE OF CONTENTS

DIVISION 1 - GENERAL REQUIREMENTS

01060 REGULATORY/PERMITTING REQUIREMENTS

01065 SAFETY

01290 PAYMENT PROCEDURES

01310 PROJECT MANAGEMENT AND COORDINATION

01320 CONSTRUCTION PROGRESS DOCUMENTATION

01322 PHOTOGRAPHIC DOCUMENTATION

01330 SUBMITTAL PROCEDURES (Reissued Amendment 2)

01352 LEED REQUIREMENTS

01353 INDOOR AIR QUALITY MANAGEMENT DURING CONSTRUCTION

01354 INDOOR AIR QUALITY TESTING BEFORE OCCUPANCY

01400 QUALITY CONTROL (Reissued Amendment 2)

01420 REFERENCES

01500 TEMPORARY FACILITIES AND CONTROLS (Reissued Amendment 2)

01524 CONSTRUCTION WASTE MANAGEMENT

01540 SECURITY

01600 PRODUCT REQUIREMENTS

01635 SUBSTITUTION PROCEDURES

01701 EXECUTION REQUIREMENTS

01702 CLOSEOUT PROCEDURES AND FINAL ACCEPTANCE

01731 CUTTING AND PATCHING

01781 PROJECT RECORD DOCUMENTS

01782 OPERATION AND MAINTENANCE DATA

01800 COMMISSIONING

01810 FUNCTIONAL PERFORMANCE TESTING (FPT) PROCEDURES

01820 DEMONSTRATION AND TRAINING

DIVISION 2 - SITE CONSTRUCTION

02230 SITE CLEARING

02231 TREE PROTECTION AND TRIMMING (Revised 12/23/2009)

02260 EXCAVATION SUPPORT AND PROTECTION

02300 EARTHWORK (Reissued Amendment 2)

02510 WATER DISTRIBUTION

02530 SANITARY SEWERAGE

02630 STORM DRAINAGE

02741 ASPHALT PAVING (Reissued Amendment 2) 02751 CEMENT CONCRETE PAVEMENT (Revised 12/18/2009)

02752 CONCRETE PAVERS FOR GREEN ROOF

NOAA – La Jolla Laboratory Replacement October 9 December 23, 2009

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02770 TACTILE WARNING SURFACES (PRECAST CONCRETE)

02810 IRRIGATION SYSTEMS (Revised 12/23/2009)

02811 IRRIGATION SYSTEM FOR GREEN ROOF

02915 SOILS FOR GREEN ROOF (Reissued Amendment 2)

02930 PLANTS FOR GREEN ROOF

02931 LANDSCAPING (Revised 12/23/2009)

DIVISION 3 - CONCRETE

03300 CAST-IN-PLACE CONCRETE (Reissued Amendment 2) 03331 CAST-IN-PLACE ARCHITECTURAL CONCRETE (Deleted Amendment 2)

03450 ARCHITECTURAL PRECAST CONCRETE STAIRS

03532 ARCHITECTURAL CONCRETE TOPPING

DIVISION 4 - MASONRY

04810 UNIT MASONRY ASSEMBLIES (Revised 12/18/2009)

DIVISION 5 - METALS

05120 STRUCTURAL STEEL (Revised 12/23/2009) 05210 STEEL JOISTS (Revised 12/18/2009)

05310 STEEL DECK

05400 COLD-FORMED METAL FRAMING (Revised 12/18/2009) (Revised 12/23/2009) 05500 METAL FABRICATIONS (Revised 12/18/2009)

05511 METAL STAIRS

05521 PIPE AND TUBE RAILINGS (Revised 12/23/2009)

05721 ORNAMENTAL RAILINGS

05730 MISCELLANEOUS INTERIOR FORMED METAL

05811 ARCHITECTURAL JOINT SYSTEMS (Reissued Amendment 2)

DIVISION 6 - WOOD AND PLASTICS

06100 ROUGH CARPENTRY

06160 SHEATHING (Reissued Amendment 2) 06402 INTERIOR ARCHITECTURAL WOODWORK (Reissued Amendment 2) (Revised 12/23/2009)

06615 ENGINEERED STONE COUNTERTOPS

06640 PLASTIC PANELING

DIVISION 7 - THERMAL AND MOISTURE PROTECTION

07131 PLAZA DECK/FOUNDATION WATERPROOFING (Reissued Amendment 2) 07162 CRYSTALLINE WATERPROOFING (Issued Amendment 2) 07182 PEDESTRIAN DECK COATINGS (Reissued Amendment 2) (Revised 12/23/2009)

07210 BUILDING INSULATION

07552 STYRENE-BUTADIENE-STYRENE (SBS) MODIFIED BITUMINOUS MEMBRANE ROOFING

(Reissued amendment 2)

NOAA – La Jolla Laboratory Replacement October 9 December 23, 2009

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07620 SHEET METAL FLASHING AND TRIM

07710 MANUFACTURED ROOF SPECIALTIES

07716 EXPANSION JOINT ASSEMBLIES (Revised 12/23/2009) 07720 ROOF ACCESSORIES (Reissued Amendment 2)

07811 SPRAYED FIRE-RESISTIVE MATERIALS

07841 THROUGH-PENETRATION FIRESTOP SYSTEMS

07842 FIRE-RESISTIVE JOINT SYSTEMS (Revised 12/23/2009)

07920 JOINT SEALANTS

DIVISION 8 - DOORS AND WINDOWS

08110 STEEL DOORS AND FRAMES (Reissued Amendment 2)

08119 FIRE RATED DOORS AND FRAMES

08130 STAINLESS-STEEL DOORS AND FRAMES (Reissued Amendment 2)

08211 FLUSH WOOD DOORS

08310 HORIZONTAL ACCESS DOOR

08340 OVERHEAD COILING GRILLES (Revised 12/23/2009) 08362 OVERHEAD COILING DOORS (Revised 12/23/2009) 08411 ALUMINUM-FRAMED ENTRANCES AND STOREFRONTS (Revised 12/23/2009)

08450 ALL-GLASS ENTRANCES AND STOREFRONTS

08520 ALUMINUM WINDOWS (Revised 12/23/2009) 08710 DOOR HARDWARE (Reissued Amendment 2) (Revised 12/23/2009)

08800 GLAZING

08816 DECORATIVE GLASS (Reissued Amendment 2)

08830 MIRRORS

08911 GLAZED ALUINUM CURTAINWALLS (Revised 12/23/2009)

DIVISION 9 - FINISHES

09111 NON-LOAD-BEARING STEEL FRAMING (Revised 12/23/2009) 09220 PORTLAND CEMENT PLASTER (Reissued Amendment 2) 09250 GYPSUM BOARD (Reissued Amendment 2) (Revised 12/18/2009) (Revised 12/23/2009)

09265 GYPSUM BOARD SHAFT-WALL ASSEMBLIES

09310 CERAMIC TILE (Reissued Amendment 2) (Revised 12/18/2009)

09511 ACOUSTICAL PANEL CEILINGS

09547 LINEAR WOOD CEILINGS (Issued Amendment 2) (Revised 12/23/2009)

09548 STAINLESS STEEL WALL PANELS

09638 STONE FLOORING (Revised 12/23/2009)

09651 RESILIENT FLOOR TILE

09652 RESILIENT SHEET FLOORING (Reissued Amendment 2)

09653 RESILIENT WALL BASE AND ACCESSORIES

09671 RESINOUS FLOORING AND WALL FINISH

09680 CARPET

09681 CARPET TILE

09720 WALL COVERINGS

09751 INTERIOR STONE FACING (Deleted Amendment 2) 09762 CONCRETE FLOOR SEALER/HARDENER (Issued Amendment 2) 09841 ACOUSTICAL WALL PANELS (Reissued Amendment 2)

09911 EXTERIOR PAINTING

09912 INTERIOR PAINTING

NOAA – La Jolla Laboratory Replacement October 9 December 23, 2009

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09931 WOOD STAINS AND TRANSPARENT FINISHES

09960 HIGH PERFORMANCE COATINGS

DIVISION 10 - SPECIALTIES

10155 TOILET COMPARTMENTS

10200 ARCHITECTURAL LOUVERS (Issued 12/23/2009) 10265 IMPACT-RESISTANT WALL PROTECTION (Revised 12/23/2009) 10431 SIGNAGE (Reissued Amendment 2)

10505 SOLID PLASTIC LOCKERS

10522 FIRE EXTINGUISHER CABINETS

10523 FIRE EXTINGUISHERS

10531 TERRA COTTA CLAY TILE BAGUETTE SYSTEM

10801 TOILET AND BATH ACCESSORIES

DIVISION 11 – EQUIPMENT

11132 PROJECTION SCREENS

11150 PARKING CONTROL EQUIPMENT (Deleted Amendment 2) 11160 LOADING DOCK EQUIPMENT (Revised 12/23/2009) 11610 FUME HOODS AND EXHAUST DEVICES (Reissued Amendment 2) 11640 LABORATORY EQUIPMENT (Reissued Amendment 2) (Revised 12/23/2009) 11641 LABORATORY FF&E – GENERAL REQUIREMENTS (Issued 12/23/2009)

DIVISION 12 – FURNISHINGS

12051 FURNITURE AND FURNISHINGS – GENERAL REQUIREMENTS (Revised 12/23/2009)

12494 ROLLER SHADES

12630 LABORATORY CASEWORK AND OTHER FURNISHINGS (Reissued Amendment 2) (Revised 12/23/2009)

12692 ENTRANCE GRIDS

DIVISION 13 - SPECIAL CONSTRUCTION

13034 CLEANROOM WALL SYSTEMS

13035 CONTROLLED ENVIRONMENT ROOMS (Reissued Amendment 2) (Revised 12/23/2009) 13037 CLEANROOM CEILINGS SYSTEMS (Revised 12/23/2009) 13090 RADIATION PROTECTION (Revised 12/23/2009)

13131 ACRYLIC AQUARIUM WINDOWS

13700 BASIC ELECTRONIC SECURITY REQUIREMENTS

13710 CARD ACCESS CONTROL SYSTEM

13712 CLOSED CIRCUIT VIDEO EQUIPMENT (Reissued Amendment 2)

13718 SECURITY EQUIPMENT CABINETS

13726 SECURITY DEVICES

13852 DIGITAL, ADDRESSABLE FIRE ALARM SYSTEM

13930 WET-PIPE FIRE SUPPRESSION SPRINKLERS

13935 DRY-PIPE FIRE SUPPRESSION SPRINKLERS

13967 CLEAN-AGENT EXTINGUISHING SYSTEMS

13974 FIRE SUPPRESSION STANDPIPES

NOAA – La Jolla Laboratory Replacement October 9 December 23, 2009

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DIVISION 14 - CONVEYING SYSTEMS

14210 ELECTRIC TRACTION PASSENGER ELEVATORS (Revised 12/23/2009) 14213 ELECTRIC TRACTION SERVICE ELEVATORS (Revised 12/23/2009) 14621 HOIST AND RAIL SYSTEM (Reissued Amendment 2)

DIVISION 15 - MECHANICAL/PLUMBING SECTIONS

15051 COMMON WORK RESULTS FOR FIRE SUPPRESSION

15052 COMMON WORK RESULTS FOR PLUMBING

15053 COMMON WORK RESULTS FOR HVAC

15057 COMMON MOTOR REQUIREMENTS FOR PLUMBING EQUIPMENT

15058 COMMON MOTOR REQUIREMENTS FOR HVAC EQUIPMENT

15061 HANGERS AND SUPPORTS FOR PLUMBING PIPING AND EQUIPMENT

15062 HANGERS AND SUPPORTS FOR HVAC PIPING AND EQUIPMENT

15072 VIBRATION AND SEISMIC CONTROLS FOR FIRE-SUPPRESSION PIPING AND

EQUIPMENT

15073 VIBRATION AND SEISMIC CONTROLS FOR PLUMBING PIPING AND

EQUIPMENT

15074 VIBRATION AND SEISMIC CONTROLS FOR HVAC PIPING AND EQUIPMENT

15076 IDENTIFICATION FOR PLUMBING PIPING AND EQUIPMENT

15077 IDENTIFICATION FOR HVAC PIPING AND EQUIPMENT

15082 PLUMBING INSULATION

15083 HVAC AND PROCESS INSULATION

15091 SLEEVES AND SLEEVE SEALS FOR FIRE SUPPRESSION PIPING

15092 SLEEVES AND SLEEVE SEALS FOR PLUMBING PIPING

15093 SLEEVES AND SLEEVE SEALS FOR HVAC PIPING

15096 ESCUTCHEONS FOR FIRE SUPPRESSION PIPING

15097 ESCUTCHEONS FOR PLUMBING PIPING

15098 ESCUTCHEONS FOR HVAC PIPING

15111 GENERAL-DUTY VALVES FOR PLUMBING PIPING

15112 GENERAL-DUTY VALVES FOR HVAC PIPING

15123 EXPANSION FITTINGS AND LOOPS FOR PLUMBING PIPING

15124 EXPANSION FITTINGS AND LOOPS FOR HVAC PIPING

15126 METERS AND GAGES FOR PLUMBING PIPING

15127 METERS AND GAGES FOR HVAC PIPING

15140 DOMESTIC WATER PIPING

15145 DOMESTIC WATER PIPING SPECIALTIES

15150 SANITARY WASTE AND VENT PIPING

15155 SANITARY WASTE PIPING SPECIALTIES

15160 STORM DRAINAGE PIPING

15165 STORM DRAINAGE PIPING SPECIALTIES

15181 HYDRONIC PIPING

15185 HYDRONIC PUMPS

15189 HVAC WATER TREATMENT

15195 FACILITY NATURAL-GAS PIPING

15214 COMPRESSED-AIR PIPING FOR LABORATORY FACILITIES

15223 CHEMICAL WASTE SYSTEMS FOR LABORATORY (Revised 12/23/2009)

15253 COMPRESSED-AIR EQUIPMENT FOR LABORATORY FACILITIES

NOAA – La Jolla Laboratory Replacement October 9 December 23, 2009

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15410 PLUMBING FIXTURES

15413 TECHNOLOGY TANK LIFE SUPPORT SYSTEMS

15415 DRINKING FOUNTAINS AND WATER COOLERS

15441 DOMESTIC WATER PUMPS

15445 SEWAGE PUMPS

15446 SUMP PUMPS

15450 POTABLE-WATER STORAGE TANKS

15469 WATER SOFTENERS

15471 AQUARIA LIFE SUPPORT SYSTEM

15487 DOMESTIC WATER HEAT EXCHANGERS

15513 CONDENSING BOILERS

15550 BREECHINGS, CHIMNEYS, AND STACKS (Revised 12/23/2009)

15555 DRAFT CONTROL DEVICES

15625 MAGNETIC BEARING CENTRIFUGAL WATER CHILLERS – 42 DEGREE CHILLED

WATER

15626 ROTARY SCREW WATER CHILLERS – 29 DEGREE CHILLED WATER

15635 REFRIGERANT DETECTION AND ALARM

15640 COOLING TOWERS

15710 HYDRONIC HEAT EXCHANGERS

15725 MODULAR INDOOR CENTRAL-STATION AIR-HANDLING UNITS

15734 COMPUTER-ROOM AIR-CONDITIONERS

15736 FILTER FAN UNITS

15762 UNIT HEATERS

15763 FAN-COIL UNITS

15815 METAL DUCTS

15820 DUCT ACCESSORIES

15836 AXIAL FANS

15838 POWER VENTILATORS, DUST COLLECTION, PAINT SPRAY BOOTH

15840 AIR TERMINAL UNITS

15855 DIFFUSERS, REGISTERS, AND GRILLES

15900 HVAC INSTRUMENTATION AND CONTROLS

15940 SEQUENCE OF OPERATION

15950 TESTING, ADJUSTING, AND BALANCING

15995 MECHANICAL SYSTEM COMMISSIONING

15996 BUILDING AUTOMATION SYSTEM COMMISSIONING

DIVISION 16 - ELECTRICAL SECTIONS

16051 COMMON WORK RESULTS FOR ELECTRICAL

16052 COMMON WORK RESULTS FOR COMMUNICATIONS

16053 COMMON WORK RESULTS FOR ELECTRONIC SAFETY AND SECURITY

16055 OVERCURRENT PROTECTIVE DEVICE COORDINATION

16060 GROUNDING AND BONDING

16073 HANGERS AND SUPPORTS FOR ELECTRICAL SYSTEMS

16074 VIBRATION AND SEISMIC CONTROLS FOR ELECTRICAL SYSTEMS

16075 ELECTRICAL IDENTIFICATION

16120 CONDUCTORS AND CABLES

16123 CONTROL-VOLTAGE ELECTRICAL POWER CABLES

16130 RACEWAYS AND BOXES

16139 CABLE TRAYS

16140 WIRING DEVICES

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16145 LIGHTING CONTROL DEVICES

16211 ELECTRICITY METERING

16215 ELECTRICAL POWER MONITORING AND CONTROL

16231 PACKAGED ENGINE GENERATORS

16264 STATIC UNINTERRUPTIBLE POWER SUPPLY

16269 VARIABLE FREQUENCY CONTROLLERS

16289 TRANSIENT VOLTAGE SUPPRESSION

16410 ENCLOSED SWITCHES AND CIRCUIT BREAKERS

16415 TRANSFER SWITCHES

16420 ENCLOSED CONTROLLERS

16441 SWITCHBOARDS

16442 PANELBOARDS

16461 LOW-VOLTAGE TRANSFORMERS

16491 FUSES

16511 INTERIOR LIGHTING

16521 EXTERIOR LIGHTING

16571 CENTRAL DIMMING CONTROLS

16714 COMMUNICATIONS EQUIPMENT ROOM FITTINGS

16716 COMMUNICATIONS BACKBONE CABLING

16717 COMMUNICATIONS HORIZONTAL CABLING

16718 CONDUCTORS AND CABLES FOR ELECTRONIC SAFETY AND SECURITY

16800 SOLAR PHOTOVOLTAIC SYSTEM (Reissued Amendment 2)

16995 ELECTRICAL SYSTEM COMMISSIONING

DIVISION 17 - COMMUNICATIONS SECTIONS

17100 VOICE-OVER-IP (VOIP) SYSTEM

NOAA - La Jolla Laboratory Consolidation October 9 December 23, 2009

TREE PROTECTION AND TRIMMING 02231 - 1

SECTION 02231 - TREE PROTECTION AND TRIMMING

PART 1 - GENERAL

1.1 SUMMARY

A. Section includes general protection and pruning of existing trees and plants that are affected by execution of the Work, whether temporary or permanent construction.

1.2 DEFINITIONS

A. Protection Zone: Area surrounding individual trees, groups of trees, shrubs, or other vegetation to be protected during construction, and indicated on Drawings

1.3 SUBMITTALS

A. Product Data: For each type of product indicated.

B. Samples: For each type of protection-zone fencing and protection-zone signage.

C. Tree Pruning Schedule: Written schedule detailing scope and extent of pruning of trees to remain that interfere with or are affected by construction.

D. Certification: From arborist, certifying that trees indicated to remain have been protected during construction according to recognized standards and that trees were promptly and properly treated and repaired when damaged.

E. Maintenance Recommendations: From arborist, for care and protection of trees affected by construction during and after completing the Work.

F. Existing Conditions: Documentation of existing trees and plantings indicated to remain, which establishes preconstruction conditions that might be misconstrued as damage caused by construction activities.

G. LEED Information:

1. Product Data for LEED Credits MR 4.1 and 4.2, Recycled Content: For products having recycled content, documentation indicating percentages by weight of postconsumer and preconsumer recycled content; include statement indicating costs for each product having recycled content.

2. Product Certificates for LEED Credits MR 5.1 and Credit MR 5.2, Regional Materials: For products and materials required to comply with requirements for regional materials indicating location and distance from Project of material manufacturer and point of extraction, harvest, or recovery for each raw material. Include statement indicating cost for each regional material and the fraction by weight that is considered regional.

TREE PROTECTION AND TRIMMING 02231 - 2

1.4 QUALITY ASSURANCE

A. Arborist Qualifications: Certified Arborist as certified by ISA, licensed arborist in jurisdiction where Project is located, current member of ASCA, or registered Consulting Arborist as designated by ASCA.

1.5 PROJECT CONDITIONS

A. The following practices are prohibited within protection zones:

1. Storage of construction materials, debris, or excavated material.

2. Parking vehicles or equipment.

3. Foot traffic.

4. Erection of sheds or structures.

5. Impoundment of water.

6. Excavation or other digging unless otherwise indicated.

7. Attachment of signs to or wrapping materials around trees or plants unless otherwise indicated.

B. Do not direct vehicle or equipment exhaust toward protection zones.

C. Prohibit heat sources, flames, ignition sources, and smoking within or near protection zones and organic mulch.

PART 2 - PRODUCTS

2.1 MATERIALS

A. Topsoil: Natural or cultivated top layer of the soil profile or manufactured topsoil; containing organic matter and sand, silt, and clay particles; friable, pervious, and black or a darker shade of brown, gray, or red than underlying subsoil; reasonably free of subsoil, clay lumps, gravel, and other objects more than 25 mm2.5 centimeter 1 inch in diameter; and free of weeds, roots, and toxic and other nonsoil materials.

B. Topsoil: Stockpiled topsoil from site.

C. Organic Mulch: Ground or shredded bark free from deleterious materials.

D. Protection-Zone Fencing: Fencing fixed in position and meeting the following requirements.

1. Plastic Protection-Zone Fencing: Plastic construction fencing constructed of high-density extruded and stretched polyethylene fabric with 5 centimeter 2-inch maximum opening in pattern and supported by tubular or T-shape galvanized-steel posts spaced not more than 2.4 meter 8 feet apart. High-visibility orange color, nonfading.

2. Height of Fencing: 1.2 meter 4 feet

3. Gates: Swing access gates matching material and appearance of fencing, to allow for maintenance activities within protection zones.

E. Protection-Zone Signage: Shop-fabricated, rigid plastic or metal sheet with attachment holes prepunched and reinforced; legibly printed with nonfading lettering.

TREE PROTECTION AND TRIMMING 02231 - 3

PART 3 - EXECUTION

3.1 EXAMINATION AND PREPARATION

A. Erosion and Sedimentation Control: Examine the site to verify that temporary erosion- and sedimentation-control measures are in place. Verify that flows of water redirected from construction areas or generated by construction activity do not enter or cross protection zones.

B. Protect tree root systems from damage caused by runoff or spillage of noxious materials while mixing, placing, or storing construction materials. Protect root systems from ponding, eroding, or excessive wetting caused by dewatering operations.

C. Protection Zones: Maintain protection zones in a weed-free state.

3.2 PROTECTION ZONES

A. Protection-Zone Fencing: Install protection-zone fencing along edges of protection zones in a manner that will prevent people from easily entering protected area except by entrance gates.

1. Chain-Link Fencing: Install to comply with ASTM F 567 and with manufacturer's written instructions.

2. Posts: Set or drive posts into ground one-third the total height of the fence without concrete footings. Where a post is located on existing paving or concrete to remain, provide appropriate means of post support acceptable to the Government.

3. Access Gates: Install as needed for maintenance of protection zone.

B. Protection-Zone Signage: Install protection-zone signage in visibly prominent locations in a manner approved by the Government.

C. Repair or replace trees, shrubs, and other vegetation indicated to remain or be relocated that are damaged by construction operations, in a manner approved by the Government.

D. Maintain protection-zone fencing and signage in good condition as acceptable to the Government and remove when construction operations are complete and equipment has been removed from the site.

3.3 EXCAVATION

A. General: Excavate at edge of protection zones and for trenches indicated within protection zones according to requirements in Division 2 Section "Earthwork."

B. Trenching near Trees: Where utility trenches are required within protection zones, hand excavate under or around tree roots or tunnel under the roots by drilling, auger boring, or pipe jacking. Do not cut main lateral tree roots or taproots; cut only smaller roots that interfere with installation of utilities. Cut roots as required for root pruning.

C. Do not allow exposed roots to dry out before placing permanent backfill.

TREE PROTECTION AND TRIMMING 02231 - 4

3.4 ROOT PRUNING

A. Prune roots that are affected by temporary and permanent construction. Root pruning shall be performed by a Certified Arborist retained by the Contractor. Prune roots as follows:

1. Cut roots manually by digging a trench and cutting exposed roots with sharp pruning instruments; do not break, tear, chop, or slant the cuts. Do not use a backhoe or other equipment that rips, tears, or pulls roots.

2. Temporarily support and protect roots from damage until they are permanently covered with soil.

3. Cover exposed roots with burlap and water regularly.

4. Backfill as soon as possible according to requirements in Division 2 Section "Earthwork."

B. Root Pruning at Edge of Protection Zone: Prune roots by cleanly cutting all roots to the depth of the required excavation.

C. Root Pruning within Protection Zone: Clear and excavate by hand to the depth of the required excavation to minimize damage to root systems. Use narrow-tine spading forks, comb soil to expose roots, and cleanly cut roots as close to excavation as possible.

3.5 CROWN PRUNING

A. Prune branches that are affected by temporary and permanent construction. Crown pruning shall be performed by a Certified Arborist retained by the Contractor Prune branches as follows:

1. Prune trees to remain to compensate for root loss caused by damaging or cutting root system. Provide subsequent maintenance during Contract period as recommended by arborist.

2. Pruning Standards: Prune trees according to ANSI A300 (Part 1) and the following:

3. Cut branches with sharp pruning instruments; do not break or chop.

4. Do not apply pruning paint to wounds.

B. Chip removed branches and dispose of off-site.

3.6 REGRADING

A. Lowering Grade: Where new finish grade is indicated below existing grade around trees, slope grade beyond the protection zone. Maintain existing grades within the protection zone.

B. Raising Grade: Where new finish grade is indicated above existing grade around trees, slope grade beyond the protection zone. Maintain existing grades within the protection zone.

C. Minor Fill within Protection Zone: Where existing grade is 5 centimeter 2 inches or less below elevation of finish grade, fill with topsoil. Place topsoil in a single uncompacted layer and hand grade to required finish elevations.

3.7 FIELD QUALITY CONTROL

A. Inspections: Engage a qualified arborist to direct plant-protection measures in the vicinity of trees, shrubs, and other vegetation indicated to remain and to prepare inspection reports.

TREE PROTECTION AND TRIMMING 02231 - 5

3.8 REPAIR AND REPLACEMENT

A. General: Repair or replace trees, shrubs, and other vegetation indicated to remain or be relocated that are damaged by construction operations, in a manner approved by the Government.

1. Have Certified Arborist perform the root cutting, branch pruning, and damage repair of trees and shrubs.

2. Treat damaged trunks, limbs, and roots according to Certified Arborist's written instructions.

3. Perform repairs within 24 hours.

4. Replace vegetation that cannot be repaired and restored to full-growth status, as determined by the Government.

3.9 DISPOSAL OF SURPLUS AND WASTE MATERIALS

A. Disposal: Remove excess excavated material, displaced trees, trash and debris, and legally dispose of them off the Government’s property.

END OF SECTION 02231

NOAA - La Jolla Laboratory Replacement October 9 December 23, 2009

IRRIGATION SYSTEM 02810 - 1

SECTION 02810 - IRRIGATION SYSTEM

1.1 RELATED DOCUMENTS

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

1.2 SCOPE OF WORK

The work includes all labor, materials, appliances, tools, equipment, facilities, transportation and services necessary for and incidental to performing all operations in connection with furnishing, delivery, and installation of a complete functioning "irrigation system," complete as shown on the drawings and as specified herein.

1.3 RELATED SECTIONS

A. EARTHWORK - SECTION 02300

B. EXTERIOR PLANTS - SECTION 02930

1.4 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 according to professional standards established for landscape installation and sprinkler irrigation operation as set forth by the California Landscape Contractors Association (CLCA). 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 and evenly and support optimum plant growth and health.

B. The Government Landscape Architect and/or his or her consultant shall be the sole judge of the true intent of the drawings and specifications and of the quality of all materials furnished in performance of the contract.

C. In the event of any discrepancies between the plans and the specifications, the final decision as to which shall be followed shall be made by the Government Landscape Architect and/or his or her consultant. The Contractor shall be compelled to act on this decision as directed.

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

D. 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 on written authorization of the Government Landscape Architect - except in an emergency endangering life or property.

E. Make use of all data in all of the contract documents including manufacturer's catalogs and verify the information on site prior to bidding on this work and also at the time of installation.

IRRIGATION SYSTEM 02810 - 2

1.5 INTENT OF CONSTRUCTION DRAWINGS

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 Government Owner’s Representative and the Landscape Architect of discrepancies between the drawings or specifications and the actual conditions. Although sizes and locations of plants and of 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 his or her work in such a manner that it will be in conformance to site conditions, complete, and in good working order.

B. Piping and equipment is to be located within the designated planting areas wherever possible unless specifically defined or dimensioned otherwise.

1.6 SUBMITTALS AND SUBSTITUTIONS

A. Prior to installation of any irrigation work, the Contractor shall submit for approval by the Landscape Architect, a list of all materials and equipment proposed for use. Submit as a minimum the following product data / catalog cut sheets to the Landscape Architect for approval:

1. Flow meter

2. Automatic controller assembly (including controller, controller cabinet, electrical

GFCI, etc.)

3. Rain-sensing device

4. Backflow preventer assembly (including “Y” strainer, pressure regulator, & enclosure cage)

5. Master control valve

6. Flow sensor and data interface

7. Main line pipe, lateral line pipe, pipe sleeves

8. Solvent cement

9. Isolation valves (gate valves, ball valves, etc)

10. Remote control valve

11. Drip valve assembly

12. Quick coupler valve

13. Valve boxes

14. Control wire

15. Air relief valves

16. Flush valves

17. Anti-drain valves

18. Waterproof wire connectors

19. Sprinkler heads (for each type)

20. Drip emitters / drip distribution tubing (for each type)

21. Paint products

22. Booster pump assembly, and all related components if required.

B. Upon fifteen (15) days after the Contractor has received the Owner's notice to proceed, the

Contractor shall submit to the Government Landscape Architect three (3) typewritten lists of all materials proposed, along with the manufacturer, model number, cut sheets, and source.

C. No substitutions of material or procedures shall be made concerning these documents without the written consent of an accepted equivalent by the Government Landscape Architect.

D. Equipment or materials installed or furnished without prior approval of the Landscape

Architect, may be rejected by the Government Landscape Architect or the Owner’s

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Representative and the Contractor shall be required to remove such materials from the site at his or her own expense.

E. 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 his or her own expense for all changes by approved substitutions, which affect other items of his or her own work and/or the work of other contractors.

F. Samples of the equipment may be required at the request of the Government Landscape

Architect if the equipment is other than that specified.

G. LEED Information:

1 Product Data for LEED Credits MR 4.1 and 4.2, Recycled Content: For products having recycled content, documentation indicating percentages by weight of postconsumer and preconsumer recycled content; include statement indicating costs for each product having recycled content.

2 Product Certificates for LEED Credits MR 5.1 and Credit MR 5.2, Regional Materials:

For products and materials required to comply with requirements for regional materials indicating location and distance from Project of material manufacturer and point of extraction, harvest, or recovery for each raw material. Include statement indicating cost for each regional material and the fraction by weight that is considered regional.

1.7 GUARANTEE

A. Contractor guarantees all equipment, materials, and labor furnished or performed under the contract (unless furnished by the Owner) against defects in design, materials, and workmanship for a period of one (1) year, unless otherwise specified, from the date of final acceptance of work.

B. Neither the final certificate for payment nor any provision in the contract documents shall relieve the Contractor of responsibility for faulty materials or workmanship, and he or she shall remedy any defects due thereto and pay for any damage to other work resulting there which may appear within a period of one (1) year from the date of final acceptance of work.

1.8 EXAMINATION OF SITE

The Contractor shall be held to have examined the project site and to have compared it with the drawings and specifications, to have carefully examined all of the contract documents and to have satisfied himself or herself as to the conditions under which the work is to be performed before entering into his or her contract for this work. No allowance shall subsequently be made on behalf of the Contractor on account of an error on his or her part or his or her negligence or failure to acquaint himself or herself with the conditions of the site, existing utility locations and easements, or of the streets or roads approaching the site. Submit any questions in writing prior to commencement of job.

1.9 PROTECTION OF WORK AND PROPERTY

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 cause to work under the contract. Materials shall be furnished in ample quantities and at such times as to ensure uninterrupted progress of the work.

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B. The Contractor shall continuously maintain adequate protection of all his or her work from damage, destruction, or loss, and shall protect the Owner's 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.

C. Prior to excavation for irrigation piping or equipment, Contractor shall locate underground utilities and related systems, and take proper precautions to avoid damage to such improvements. In the event of a conflict between such utilities, related systems, lines, irrigation piping, and/or equipment locations, Contractor shall notify the Owner's Representative and arrangements will be made for relocation as necessary. The Contractor assumes responsibility for making repairs for damages resulting from work as herein specified.

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

1.10 PROTECTION OF EXISTING IRRIGATION SYSTEM AND PLANT MATERIAL

A. All existing irrigation system components and plant material to remain which are within the project limits shall be tagged and identified by the Contractor prior to start of work. Contractor shall provide the required maintenance to maintain the vegetation in a healthy and growing condition, including supplemental irrigation if needed.

B. All existing irrigation system components and plant material shall be protected at all times from damage by personnel and equipment. All damages to existing irrigation system components and plant materials shall be repaired at the Contractor's expense.

C. Damage to a tree or shrub, which results in death or permanent disfiguration, shall result in the Contractor's complete removal of said tree or shrub, including roots, from the site. The Contractor shall replace the plant material as established by the Landscape Architect with one of equal value at his or her own expense or shall reimburse to the Owner the cost of said replacement. The Landscape Architect shall be the sole judge of the replacement of any plant material.

1.11 POINTS OF CONNECTION

A. The Contractor shall verify with the Owner’s Representative the most appropriate location and source for the water and electrical points of connection.

B. The electrical point of connection shall be made by an appropriately licensed Electrical

Contractor per governing codes.

1.12 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 Owner's Representative. Existing utilities may be used with the written permission of the Owner’s Representative.

B. The Contractor shall meter and pay for the furnishing of all electricity and water for his or her use unless otherwise stated. All water used for construction purposes shall be separated from the potable domestic water supply by a reduced pressure principle device (RP) backflow preventer approved by the Landscape Architect.

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1.13 SPECIMEN TREES

All specimen trees twenty-four-inch (24") box and larger shall be installed prior to the location of the irrigation system. The layout of the irrigation system shall be adjusted to accommodate all specimen trees with the approval of the Owner's Representative.

1.14 USE OF PREMISES

The Contractor shall confine his or her apparatus, the storage of materials and the operations of his or her personnel to limits indicated by the law, ordinances, or permits and shall not unreasonably encumber the premises with his or her materials.

1.15 PERMITS AND REGULATIONS

The Contractor shall give all notices and pay all fees necessary for completion of work under this contract, and shall obtain and pay for all permits, certifications, and licenses (except permanent easements) over all or any part of the work as drawn and specified.

1.16 APPLICABLE CODES AND STANDARDS

A. Wherever references are made in the contract 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.

Unless otherwise specified, reference to such standards or codes is solely for implementation of the technical portions of such standards and codes.

B. In case of conflict among any referenced standards or codes or between any referenced standards and codes and the specifications, the Landscape Architect shall determine which shall govern.

1.17 DRAWINGS AND SPECIFICATIONS AT THE WORK SITE

The Contractor shall keep one copy of all drawings and specifications on the work site, in good order, available to the Landscape Architect and to his or her representatives at the project site.

1.18 RECORD DRAWINGS

A. The Contractor shall be responsible for completion of ” Record Drawings, and the following procedure shall be adhered to:

1. Contractor shall maintain a redline Record Drawings set on-site at all times during construction, and shall update drawings on Friday of every week.

2. The Contractor shall not request inspection of any work installed contrary to the drawings until noted on the redline Record Drawings.

3. Before the final request for payment is made and final approval obtained, pre-As-Built Record Drawings shall be completed by the Contractor. One copy set of the drawings shall be delivered to the Landscape Architect with all as-built indications and changes noted, marking out all items which are not as-built conditions. The drawings shall present the final as-built information clearly.

Equipment such as valves and backflow preventers shall be referenced and dimensioned from two fixed points on the site, to triangulate their location.

4. After Record Drawings have been approved by the Landscape Architect, the Contractor shall obtain, at his or her own expense, Mylar transparencies of the original drawings and transfer the as-built information onto them. Drafting shall be of equal quality to the working drawings. All as-built indications shall be made on the transparencies by an experienced draftsperson. All as-built changes shall be drafted

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in black India ink. All items, which have changed and are not as-built shall be bubble/cloud encircled and clearly labeled.

5. The Contractor shall sign and certify on the original drawings as to the accuracy of the completed Record Drawings. All damages due to inaccurate As-Built Drawings shall be repaired within twenty-four (24) hours after notification to the satisfaction of the Owner’s Representative and at no cost to the Owner.

1.19 CONTROLLER CHARTS

A. Provide one controller chart for each automatic controller installed. Controller chart shall be blackline print of actual As-Built Record Drawings showing the area covered by that controller and reduced to fit in the controller cabinet. Keep reduction to maximum size possible to retain full legibility.

B. Identify the area of coverage of each remote control valve, using a distinctly different pastel color, drawn over the entire piping system of the area of coverage.

C. Following approval of charts by the Landscape Architect, hermetically seal chart between two layers of 20 mil. thick plastic sheeting.

D. Charts must be completed and approved prior to final walk-through of irrigation system.

E. The charts shall be affixed to the inside of the controller cabinet doors using an approved mastic or fastening system and also in the maintenance room area, if applicable.

1.20 SITE OBSERVATIONS

A. Site observations herein specified shall be made by the Government Landscape Architect during office working hours on each of the steps or conditions listed below. The Contractor or his or her authorized representative shall be on the site at the time of each observation.

The Contractor will not be permitted to initiate the succeeding step of work until he or she has received approval to proceed by the Government Landscape Architect. The Contractor shall notify the Government Landscape Architect of a requested site observation at least three (3) business days in advance of an observation.

B. All changes and deviations to the plans and specifications by the Government Landscape

Architect to the Contractor shall be confirmed in writing.

C. The Contractor shall have sufficient work personnel available during normal working hours to correct deficiencies immediately upon request of the Landscape Architect. Such repair or re-work services are to be performed without interference of regular project schedule.

D. Site observations will be required for the following parts of the work:

1. PRE-CONSTRUCTION MEETING: Immediately prior to the commencement of work of this section, the Owner’s Representative, Landscape Architect, and the Contractor shall meet for approval of the materials specified, equipment, schedule of work and the method of installation.

2. TRENCHING AND SLEEVING REVIEW: Completion and installation of all trenching and sleeving.

3. PRESSURE MAIN LINE TEST: Completion of installation and testing, prior to backfilling.

4. LATERAL LINE TEST: Completion and testing, prior to backfilling.

5. ADJUSTMENT AND COVERAGE TEST: Adjust and test the operating performance of all installed irrigation systems prior to commencement of planting operations with the exception of specimen tree planting.

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6. PRE-MAINTENANCE OBSERVATION: Entire irrigation system shall be completely installed and operational. All discharge ends of drip emitters shall be exposed under operation for observation to demonstrate that all emitters are performing and installed as designed, prior to placing bark mulch over emitter discharge ends. This observation shall be coordinated with the pre-maintenance observation of the planting installation. A written “punch list” indicating all items to be corrected and the beginning date of the Maintenance Period will be sent to the Contractor. This is not Final Acceptance and does not relieve the Contractor from any of the responsibilities in the contract documents.

7. FINAL SITE OBSERVATION AND ACCEPTANCE: At the conclusion of the Maintenance Period, a final site observation will be made. The Contractor shall show evidence that the Owner’s Representative has received all charts, records, drawings, and extra equipment as required before Final Acceptance. The Contractor shall show all corrections made from the written “punch list” previously generated by the Landscape Architect. Any items deemed not acceptable shall be reworked and the Maintenance Period will be extended.

8. The Contractor will be notified in writing that the contract work and Maintenance Period has been accepted or that the Maintenance Period has been extended to correct any deficiencies remaining. Final Acceptance shall establish the beginning date for the Guarantee Period.

E. Site observation of the work shall not relieve the Contractor of the obligation to fulfill all conditions of the contract.

PART 2 - PRODUCTS

2.1 MATERIALS

A. All materials shall be of standard, approved, and first grade quality and shall be new and in perfect 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 Landscape Architect.

Only upon submittal and subsequent written approval of the material list shall these items be permitted. Changes to hydraulics brought about by the use of other equipment than that specified shall be recalculated by the Contractor and submitted to the Landscape Architect for written approval. Such work shall not be installed prior to receipt by the Contractor of the written approval.

C. Whenever such terms as "in accordance with manufacturer's specifications" is used, it shall mean in strict accordance with the manufacturer's printed directions. If those directions conflict with this specification, the matter shall be brought to the attention of the Landscape Architect for clarification prior to proceeding with work.

D. Approval of any items or substitutions indicates only that the product(s) apparently meet the requirements of the drawings and specifications on the basis of the information or samples submitted. The Contractor shall be responsible for the performance of substituted items. If the substitution proves to be unsatisfactory, the Contractor shall replace said items with the originally specified items, including all necessary work and modifications to replace the items, at no cost to the Owner.

2.2 PIPING MATERIAL

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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. Steel Pipe: ASTM A 53/A 53M, Schedule 40, Type S or E, Grade A or B, galvanized with threaded ends.

1. Steel Pipe Nipples: ASTM A 733, made of ASTM A 53/A 53M or ASTM A 106, Schedule 40, galvanized, seamless steel pipe with threaded ends.

2. Malleable-Iron Unions: ASME B 16.39, Class 150, hexagonal-stock body with ball-and-socket, metal-to-metal, bronze seating surface, and female threaded ends.

3. Gray-Iron Threaded Fittings: ASME B 16.4, Class 125, galvanized, standard pattern.

4. Cast-Iron Flanges: ASME B 16.1, Class 125.

5. Cast-Iron Flanged Fittings: ASME B 16.1, Class 125, galvanized.

C. Brass pipe and fittings: Brass pipe shall be 85% red brass, American National Standard

Institute (ANSI), Schedule 40-screwed pipe.

1. Fittings shall be medium brass, screwed 125-pound Class.

D. Hard copper tube and fittings: Copper tube (pipe) shall be ASTM B 88, Type L, water tube, drawn temper.

1. Fittings shall be ASME B16.18, cast-copper-alloy or ASME B16.22, wrought-copper, solder-joint fittings for 2-1/2 inch size and smaller pipe.

2. Cast brass fittings shall be used for pipe over 2-1/2 inch size.

3. Bronze Flanges: ASME B 16.24, Class 150, with solder-joint end.

4. Copper Unions: MSS SP-123, cast-copper-alloy, hexagonal-stock body, with ball-and-socket, metal-to-metal seating surfaces and solder-joint or threaded ends.

E. Plastic pipe and fittings:

1. All pipes shall be free of blisters, internal striations, cracks, or any other defects or imperfections. The pipe shall be continuously and permanently marked with the following information: manufacturer’s name or trade mark, size, class and type of pipe, pressure rating, quality control identifications, and date of extrusion.

2. Pressure mainline for piping upstream of remote control valves and quick coupling valves:

a. 4” diameter pipe and larger: Shall be manufactured rigid virgin polyvinyl chloride PVC CLASS 200, conforming to ASTM D 2241. Pipe shall have an integral bell end with a locked-in factory installed gasket. Bell shall meet requirements of ASTM D 2672, gasket shall meet requirements of ASTM D 3139, and gasket material shall meet requirements of ASTM F 477. Pipe sizes shall be installed as shown on plans.

b. 2” to 3” diameter pipe: Plastic pipe for use with solvent weld or threaded fittings. Shall be manufactured rigid virgin polyvinyl chloride PVC 1120, ASTM D 1784, conforming to ASTM D 2241, class 315, SDR 13.5.

c. 3/4” to 1-1/2” diameter pipe: Plastic pipe for use with solvent weld and/or threaded fittings. Shall be manufactured rigid virgin polyvinyl chloride PVC 1120, ASTM D 1784, conforming to ASTM D 1785, designated as Schedule 40.

3. Non-pressure lateral line for piping downstream of remote control valves 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, three-quarter-inch (3/4) minimum size.

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4. Identification: Furnish plastic pipe continuously and permanently marked with following information: Manufacturer's name or trade mark, size, class and type of pipe, working pressure at 73.4 F and National Sanitation Foundation (NSF) rating.

5. Polyethylene tubing for drip systems shall be constructed of linear, low density, polyethylene resin manufactured under ASTM Standards.

6. Fittings and connections:

a. Fittings for 4” diameter pipe and larger: Fittings shall be ductile iron, deep-bell, gasketed fittings manufactured by Leemco, Inc., or approved equal.

b. Fittings for 3" diameter pipe and smaller shall be plastic manufactured rigid virgin polyvinyl chloride (PVC) 1220, (Type 2, Grade 1), conforming to ASTM D 2464 or D 2466, Schedule 40, high impact molded suitable for either solvent weld or threaded connections as required.

2.3 PIPE CONNECTION MATERIALS

A. Threaded connections: Teflon tape or approved equivalent, UL listed.

B. Gasketed fittings: Lubricant per manufacturer’s recommendations.

C. Solvent weld connections - primer and adhesive solvent shall be type as recommended by manufacturer of pipe and fittings:

1. All cans of solvents and primers shall have labels intact and shall be stamped with the date and manufacturer. No cans dated over two (2) years old will be permitted.

2. No thinning of solvent or primer in any manner will be permitted.

D. Nipples and risers:

1. Metallic: red brass, standard pipe size, schedule 40, ASTM b43. Composition:

nominal copper content to be 85 percent (min. 83%, max. 86%), nominal zinc content to be 15 percent. Maximum allowable lead and iron content to be 0.05 percent each.

2. Plastic: plastic nipples and risers shall be manufactured rigid virgin polyvinyl chloride PVC, (Type 1, Grade 1), conforming to ASTM D 1784 or D 2464, designated as Schedule 80 with molded threads.

2.4 BACKFLOW PREVENTION DEVICE / BACKFLOW PREVENTION ASSEMBLY

A. All sprinkler irrigation systems that are using water from potable water systems shall require backflow prevention. All backflow prevention devices shall be installed in accordance with requirements set forth by all regional codes, local codes, and the local Health Department.

B. Backflow prevention device shall be reduced pressure principle device (RP), constructed of brass or bronze, with all bronze or stainless steel trim and all moving parts of non-corrosive materials. All parts shall be removable or replaceable without removal of the unit from the line.

C. Backflow prevention assembly shall be integrally fitted with a brass or bronze isolation valve at both the inlet and outlet points.

D. See irrigation legend on the drawings for manufacturer and model type.

E. Backflow prevention assembly is to be housed within expanded metal backflow prevention assembly enclosure, constructed of #9 expanded stainless steel, with stainless steel frame.

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Size as required to completely enclose entire backflow preventer assembly. Lemeur, Rainman, Strong Box, or approved equal.

F. Pressure regulator on backflow prevention assembly: Pressure regulator shall consist of a bronze body and bell housing, a separate access cover for the plunger, and a bolt to adjust the downstream pressure. The bronze bell housing and access cap shall be threaded to the body and shall not require the use of ferrous screws. The assembly shall be of the balanced piston design and shall reduce pressure in both flow and no-flow conditions.