32_90_00_Planting-Rev20161103.pdf

U.S. General Services Adminstration Mid-Atlantic Region

Public Buildings Service

SECTION 32 90 00

PLANTING

100% Design – Issue for Bid 32 90 00-1 October 19, 2016 \\uspsw2pfpsw001\Data\Data_USPSW2VFP001\Environment\Piscataway\Project\GSA\60436364 Belle Mead Design\500 Deliverables\503 North Parcel Issue for Bid Design\Specifications\32 - Exterior Improvements\32 90 00 Planting.docx

PART 1 – GENERAL

1.01. SECTION INCLUDES:

A. Summary B. Laws and Regulations C. Safety D. Definitions E. Submittals F. Quality Assurance G. Delivery, Storage, and Handling H. Coordination I. Warranty J. Maintenance K. Tree and Shrub Material L. Plants M. Fertilizer N. Mulches O. Stakes and Guys P. Miscellaneous Products Q. Planting Soil Mix R. Examination S. Preparation T. Planting Bed Establishment U. Tree and Shrub Excavation V. Tree and Shrub Planting W. Tree and Shrub Pruning X. Guying and Staking Y. Ground Cover and Plant Planting Z. Planting Bed Mulching AA. Cleanup and Protection BB. Disposal CC. Landscape Maintenance

1.02. SUMMARY:

A. This section describes the work required to plant and maintain trees, shrubs, cuttings, and plantings as part of wetland and Site restoration. See Table 32 90 00 -1A-1D (Wetland Area Plantings), Table 32 90 00-2A-2B (Transition Area Plantings) and Table 32 90 00 -3A-3B (Riparian Zone Plantings). The Contractor will provide all labor and materials to restore all designated Wetlands areas and other areas as indicated on these tables and in the Construction Drawings and the Tree Preservation/Mitigation Plan submitted to the Township of Hillsborough.

1.03. LAWS AND REGULATIONS:

A. All work under this Contract shall be accomplished in accordance with regulations of local, county, State and Federal agencies and utility authority standards as they apply.

Public Buildings Service

SECTION 32 90 00

PLANTING

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1.04. SAFETY:

A. Methods of operation utilized in work related to these specifications shall be such as to provide maximum protection against injury or death to workmen or the public.

Requirements of the United States and New Jersey Occupational Safety and Health Acts as to safety regulations and procedures shall be adhered to for all work covered under these specifications.

1.05. DEFINITIONS:

A. Balled and Burlapped Stock: Exterior plants dug with firm, natural balls of earth in which they are grown, with ball size not less than diameter and depth recommended by ANSI Z60.1 for type and size of tree or shrub required; wrapped, tied, rigidly supported, and drum-laced as recommended by ANSI Z60.1.

B. Container-Grown Stock: Healthy, vigorous, well-rooted exterior plants grown in a container with well-established root system reaching sides of container and maintaining a firm ball when removed from container. Container shall be rigid enough to hold ball shape and protect root mass during shipping and be sized according to ANSI Z60.1 for kind, type, and size of exterior plant required.

C. Finish Grade: Elevation of finished surface of planting soil.

D. Planting Soil: Native or imported topsoil, manufactured topsoil, or surface soil modified to become topsoil; mixed with soil amendments.

E. Subgrade: Surface or elevation of subsoil remaining after completing excavation, or top surface of a fill or backfill, before placing planting soil.

1.06. SUBMITTALS:

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

B. Product Certificates: For each type of manufactured product, signed by product manufacturer, and complying with the following:

1. Manufacturer's certified analysis for standard products.

2. Analysis of other materials by a recognized laboratory made according to meth-ods established by the Association of Official Analytical Chemists, where appli-cable.

3. List of sources for each species specified and certification that material is re-served for Work.

C. Planting Schedule: Indicating anticipated planting dates for exterior plants.

D. Maintenance Instructions: Recommended procedures to be established by Construction Manager for maintenance of exterior plants during a calendar year. Submit before expiration of required maintenance periods.

Public Buildings Service

SECTION 32 90 00

PLANTING

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1.07. QUALITY ASSURANCE:

A. Installer Qualifications: A qualified landscape installer whose Work has resulted in successful establishment of exterior plants.

1. Installer's Field Supervision: Require installer to maintain an experienced full-time supervisor on Project Site when exterior planting is in progress.

B. Provide quality, size, genus, species, and variety of exterior plants indicated, complying with applicable requirements in ANSI Z60.1, "American Standard for Nursery Stock."

1. Selection of exterior plants purchased under allowances will be made by Wetland Scientist, who will tag plants at their place of growth before they are prepared for transplanting.

C. Tree and Shrub Measurements: Measure according to ANSI Z60.1 with branches and trunks or canes in their normal position. Do not prune to obtain required sizes. Take caliper measurements 6 inches above ground for trees up to 4-inch caliper size, and 12 inches above ground for larger sizes. Measure main body of tree or shrub for height and spread; do not measure branches or roots tip-to-tip.

D. Observation: Wetland Scientist may observe trees and shrubs either at place of growth or at site before planting for compliance with requirements for genus, species, variety, size, and quality. Wetland Scientist retains right to observe trees and shrubs further for size and condition of balls and root systems, insects, injuries, and latent defects and to reject unsatisfactory or defective material at any time during progress of Work. Remove rejected trees or shrubs immediately from Project Site.

1. Notify Wetland Scientist of sources of planting materials seven days in advance of delivery to the site.

E. Pre-installation Conference: Conduct conference at Project Site.

1.08. DELIVERY, STORAGE, AND HANDLING:

A. Deliver exterior plants freshly dug.

B. Do not prune trees and shrubs before delivery, except as approved by Wetland Scientist.

Protect bark, branches, and root systems from sun scald, drying, sweating, whipping, and other handling and tying damage. Do not bend or bind-tie trees or shrubs in such a manner as to destroy their natural shape. Provide protective covering of exterior plants during delivery. Do not drop exterior plants during delivery.

C. Handle planting stock by root ball.

D. Deliver exterior plants after preparations for planting have been completed and install immediately. If planting is delayed more than six hours after delivery, set exterior plants trees in shade, protect from weather and mechanical damage, and keep roots moist.

1. Set balled stock on ground and cover ball with soil, peat moss, sawdust, or other acceptable material.

Public Buildings Service

SECTION 32 90 00

PLANTING

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2. Do not remove container-grown stock from containers before time of planting.

3. Water root systems of exterior plants stored on site with a fine-mist spray. Water as often as necessary to maintain root systems in a moist condition.

1.09. COORDINATION:

A. Planting Restrictions: Plant during one of the following periods. Coordinate planting periods with maintenance periods to provide required maintenance from date of Substantial Completion.

1. Spring Planting: 15 March to 30 April.

2. Fall Planting: 1 September to Oct 15 for grasses and herbaceous species; ex-tend to Nov 15 for shrubs and trees.

B. Weather Limitations: Proceed with planting only when existing and forecasted weather conditions permit.

C. Coordination with Lawns: Plant trees and shrubs after finish grades are established unless otherwise acceptable to Wetland Scientist.

1.10. WARRANTY:

A. Special Warranty: Warrant the following exterior plants, for the warranty period indicated, against defects including death and unsatisfactory growth, except for defects or incidents that are beyond Contractor's control.

1. Warranty Period for Trees and Shrubs: 3 years from date of Substantial Comple-tion. Release from the 3 year warranty for the restoration project is contingent upon the vegetation meeting the performance criteria. Replacements will be guaranteed/warranted to one additional growing season beyond the original 3-year period; provided that the design criteria have been met.

2. Warranty Period for Ground Cover and Plants: 3 years from date of Substantial Completion. Release from the 3 year warranty for the restoration project is con-tingent upon the vegetation meeting the performance criteria. Replacements will be guaranteed/warranted to one additional growing season beyond the original 3-year period; provided that the design criteria have been met.

3. By the end of the third full growing season: the trees shall exhibit a survival rate of 80 percent; shrubs shall exhibit a survival rate of 80 percent; herbaceous plugs (potted materials) shall exhibit a survival rate of 85 percent. Plantings not meet-ing the above survival rate shall be replaced immediately unless required to plant in the succeeding planting season.

4. By the end of the third full growing season: trees and shrubs shall exhibit a sur-vival rate of 75 percent; herbaceous plugs (potted material) shall exhibit a surviv-al rate of 85 percent. Plantings not meeting the above survival rate shall be re-placed immediately unless required to plant in the succeeding planting season.

Public Buildings Service

SECTION 32 90 00

PLANTING

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5. Replace exterior plants that are more than 25 percent dead or in an unhealthy condition as directed by the Wetland Scientist and at end of warranty period.

6. A limit of one replacement of each exterior plant will be required, except for loss-es or replacements due to failure to comply with requirements. Replacements will be guaranteed/warranted to one additional growing season beyond the original 3-year period.

1.11. MAINTENANCE:

A. Trees and Shrubs: Maintain for the specified maintenance period by pruning, cultivating, watering, weeding, fertilizing, restoring planting saucers, tightening and repairing stakes and guy supports, and resetting to proper grades or vertical position, as required to establish healthy, viable plantings. Spray as required to keep trees and shrubs free of insects and disease. Install browse protection devices as necessary to control herbivory.

B. Ground Cover and Plants: Maintain for the specified maintenance period by watering, weeding, fertilizing, and other operations as required to establish healthy, viable plantings.

PART 2 – PRODUCTS

2.01 TREE AND SHRUB MATERIAL:

A. General: See Table 32 90 00-1 and Table 32 90 00-3 for list ofDrawings and Tree Mitigation Plan for BVW and SAV plant species list to be installed by Contractor. Furnish nursery-grown trees and shrubs in accordance with Table 32 90 00-1 and Table 32 90 00-3the Drawings and the Tree Mitigation Plan with healthy root systems developed by transplanting or root pruning. Provide well-shaped, fully branched, healthy, vigorous stock free of disease, insects, eggs, larvae, and defects such as knots, sun scald, injuries, abrasions, and disfigurement.

B. Wetlands: The Project area shall be fertilized, seeded, and mulched in accordance with the specifications below. During restoration of temporarily impacted wetlands fertilizer, lime and mulch will not be used unless required in writing by the appropriate agency

C. Grade: Provide trees and shrubs of sizes and grades complying with ANSI Z60.1 for type of trees and shrubs required. Trees and shrubs of a larger size may be used if acceptable to Wetland Scientist, with a proportionate increase in size of roots or balls.

D. Label at least one tree and one shrub of each variety and caliper with a securely attached, waterproof tag bearing legible designation of botanical and common name.

2.02 PLANTS:

A. Perennials: Provide healthy, field-grown plants from a commercial nursery, of species and variety shown or listed.

Public Buildings Service

SECTION 32 90 00

PLANTING

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2.03 FERTILIZER:

A. Slow-Release Fertilizer in upland areas: Granular or pelleted fertilizer consisting of 50 percent water-insoluble nitrogen, phosphorus, and potassium in the following composition:

1. Composition: 20 percent nitrogen, 10 percent phosphorous, and 10 percent po-tassium, by weight.

2. Composition: Nitrogen, phosphorous, and potassium in amounts recommended in soil reports from a qualified soil-testing agency.

2.04 MULCHES:

A. Compost Mulch in upland areas: Well-composted, stable, and weed-free organic matter, pH range of 5.5 to 8; moisture content 35 to 55 percent by weight; 100 percent passing through 1-inch sieve; soluble salt content of 5 to 10 decisiemens/m; not exceeding 0.5 percent inert contaminants and free of substances toxic to plantings; and as follows:

1. Organic Matter Content: 50 to 60 percent of dry weight.

2. Feedstock: Agricultural, food, or industrial residuals; biosolids; yard trimmings; or source-separated or compostable mixed solid waste.

2.05 STAKES AND GUYS:

A. Upright and Guy Stakes: Rough-sawn, sound, new hardwood, redwood, or pressure-preservative-treated softwood, free of knots, holes, cross grain, and other defects, 2 by 2 inches by length indicated, pointed at one end, or metal “T” fence post.

B. Guy and Tie Wire: ASTM A 641/A 641M, Class 1, galvanized-steel wire, 2-strand, twisted, 0.106 inch in diameter.

C. Hose Chafing Guard: Reinforced rubber or plastic hose at least 1/2 inch in diameter, black, cut to lengths required to protect tree trunks from damage.

2.06 MISCELLANEOUS PRODUCTS:

A. Antidesiccant: Water-insoluble emulsion, permeable moisture retarder, film forming, for trees and shrubs. Deliver in original, sealed, and fully labeled containers and mix according to manufacturer's written instructions.

2.07 PLANTING SOIL MIX:

A. Planting Soil Mix: Mix topsoil with the following soil amendments and fertilizers in upland areas in the following quantities:

1. Ratio of Loose Compost to Topsoil by Volume: 1:4.

2. Weight of Bonemeal per 1000 Sq. Ft : 10 lbs.

3. Weight of Slow-Release Fertilizer per 1000 Sq. Ft.: 2 lbs.

Public Buildings Service

SECTION 32 90 00

PLANTING

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PART 3 – EXECUTION

3.01 EXAMINATION:

A. Examine areas to receive exterior plants for compliance with requirements and conditions affecting installation and performance. Proceed with installation only after unsatisfactory conditions have been corrected.

3.02 PREPARATION:

A. Protect structures, utilities, sidewalks, pavements, and other facilities, and lawns and existing exterior plants from damage caused by planting operations.

B. Provide erosion-control measures to prevent erosion or displacement of soils and discharge of soil-bearing water runoff or airborne dust to adjacent properties and walkways.

C. Lay out individual tree and shrub locations and areas for multiple exterior plantings. Stake locations, outline areas, adjust locations when requested, and obtain Wetland Scientist's acceptance of layout before planting. Make minor adjustments as required.

D. Lay out exterior plants at locations shown on the Drawings and/or in accordance with the Tree Mitigation PlanTables 1A through 1E. Stake locations of individual trees and shrubs and outline areas for multiple plantings.

3.03 PLANTING BED ESTABLISHMENT:

A. Loosen subgrade of planting beds to a minimum depth of 4 inches. Remove stones larger than 1-1/2 inches in any dimension and sticks, roots, rubbish, and other extraneous matter and legally dispose as directed by the Construction Manager.

1. Apply fertilizer in upland areas directly to subgrade before loosening.

2. Spread topsoil, apply soil amendments and fertilizer on upland surfaces, and thoroughly blend planting soil mix.

a. Delay mixing fertilizer with planting soil if planting will not proceed within 5 days.

3. Spread planting soil mix to a depth of 4 inches but not less than required to meet finish grades after natural settlement. Do not spread if planting soil or subgrade is frozen, muddy, or excessively wet.

a. Spread approximately one-half the thickness of planting soil mix over loosened subgrade. Mix thoroughly into top 2 inches of subgrade.

Spread remainder of planting soil mix.

B. Finish Grading: Grade planting beds to a smooth, uniform surface plane with loose, uniformly fine texture. Roll and rake, remove ridges, and fill depressions to meet finish grades.

Public Buildings Service

SECTION 32 90 00

PLANTING

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C. Restore planting beds if eroded or otherwise disturbed after finish grading and before planting.

3.04 TREE AND SHRUB EXCAVATION:

A. Pits and Trenches: Excavate circular pits with sides sloped inward. Trim base leaving center area raised slightly to support root ball and assist in drainage. Do not further disturb base. Scarify sides of plant pit smeared or smoothed during excavation.

1. Excavate approximately two times as wide as ball diameter for balled and bur-lapped and container-grown stock.

2. If drain tile is shown or required under planted areas, excavate to top of porous backfill over tile.

B. Subsoil removed from excavations may be used as backfill.

C. Obstructions: Notify Wetland Scientist if unexpected rock or obstructions detrimental to trees or shrubs are encountered in excavations.

D. Drainage: Notify Wetland Scientist if subsoil conditions evidence unexpected water seepage or retention in tree or shrub pits.

E. Fill excavations with water and allow to percolate away before positioning trees and shrubs.

3.05 TREE AND SHRUB PLANTING:

A. Set balled and burlapped stock plumb and in center of pit or trench with top of root ball flush with adjacent finish grades.

1. Remove burlap and wire baskets from top third of root balls and partially from sides, but do not remove from under root balls. Remove pallets, if any, before setting. Do not use planting stock if root ball is cracked or broken before or during planting operation.

2. Place planting soil mix around root ball in layers, tamping to settle mix and elimi-nate voids and air pockets. When pit is approximately one-half backfilled, water thoroughly before placing remainder of backfill. Repeat watering until no more water is absorbed. Water again after placing and tamping final layer of planting soil mix.

B. Set container-grown stock plumb and in center of pit or trench with top of root ball flush with adjacent finish grades.

1. Carefully remove root ball from container without damaging root ball or plant.

2. Place planting soil mix around root ball in layers, tamping to settle mix and elimi-nate voids and air pockets. When pit is approximately one-half backfilled, water thoroughly before placing remainder of backfill. Repeat watering until no more water is absorbed. Water again after placing and tamping final layer of planting soil mix.

Public Buildings Service

SECTION 32 90 00

PLANTING

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3.06 TREE AND SHRUB PRUNING:

A. Prune, thin, and shape trees and shrubs as directed by Wetland Scientist.

B. Prune, thin, and shape trees and shrubs according to standard horticultural practice.

Prune trees to retain required height and spread. Unless otherwise indicated by Wetland Scientist, do not cut tree leaders; remove only injured or dead branches from flowering trees. Prune shrubs to retain natural character. Shrub sizes indicated are sizes after pruning.

3.07 GUYING AND STAKING:

A. Upright Staking and Tying: Stake trees of 2- through 5-inch caliper. Stake trees of less than 2-inch caliper only as required to prevent wind tip-out. Use a minimum of 2 stakes of length required to penetrate at least 18 inches below bottom of backfilled excavation and to extend at least 72 inches above grade. Set vertical stakes and space to avoid penetrating root balls or root masses. Support trees with two strands of tie wire encased in hose sections at contact points with tree trunk. Allow enough slack to avoid rigid restraint of tree. Use the number of stakes as follows:

1. Use 2 stakes for trees up to 12 feet high and 2-1/2 inches or less in caliper; 3 stakes for trees less than 14 feet high and up to 4 inches in caliper. Space stakes equally around trees.

3.08 GROUND COVER AND PLANT PLANTING:

A. Set out and space ground cover and plants as indicated.

B. Dig holes large enough to allow spreading of roots, and backfill with planting soil.

C. Work soil around roots to eliminate air pockets and leave a slight saucer indentation around plants to hold water.

D. Water thoroughly after planting, taking care not to cover plant crowns with wet soil.

E. Protect plants from hot sun and wind; remove protection if plants show evidence of recovery from transplanting shock.

3.09 PLANTING BED MULCHING:

A. Mulch backfilled surfaces of planting beds and other areas indicated.

1. Organic Mulch: Apply 3-inch average thickness of organic mulch, and finish level with adjacent finish grades. Do not place mulch against plant stems.

3.10 CLEANUP AND PROTECTION:

A. During exterior planting, keep adjacent pavings and construction clean and Work area in an orderly condition.

Public Buildings Service

SECTION 32 90 00

PLANTING

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B. Protect exterior plants from damage due to landscape operations, operations by other contractors and trades, and others. Maintain protection during installation and maintenance periods. Treat, repair, or replace damaged exterior planting.

3.11 DISPOSAL:

A. Disposal: Remove surplus soil and waste material, including excess subsoil, unsuitable soil, trash, and debris, and legally dispose of them as directed by the Construction Manager.

PART 4 – MAINTENANCE

4.01. LANDSCAPE MAINTENANCE:

A. During the landscape establishment period, the Contractor shall perform landscape maintenance as described herein. The Contractor shall maintain all landscaped areas in the condition they were in when first installed and accepted. Prior to the Notice of Substantial Completion, the Contractor shall submit a detailed maintenance plan which includes a schedule showing the number of hours or days personnel will be present, the type of Work to be performed, supervision, equipment and supplies to be used, emergency program and responsible person to contact for emergency Work, and inspection schedule. The detailed maintenance plan is subject to review and approval by the Construction Manager. The Construction Manager will not issue the Notice of Substantial Completion until the Construction Manager has received and approved the maintenance plan.

B. The proposed types, brand names, material safety data sheets, and rates of application of herbicides, pesticides, and fertilizers to be used shall be submitted for approval with the detailed maintenance plan. Herbicides, pesticides, and fertilizers shall meet all local, state, and federal Regulations and shall be applied by a licensed applicator.

C. The Contractor shall keep a Project diary documenting all landscape and irrigation maintenance activities including Work locations and time spent. The Contractor shall provide copies of the diary to the Construction Manager upon request.

D. The Contractor shall restore and reseed eroded areas and areas of poor establishment.

The Contractor shall maintain staking and guying until the end of the landscape establishment period. The Contractor shall remove all guying wire, straps, and stakes at the end of the landscape establishment period.

E. Watering in Non-irrigated Areas:

1. Trees planted shall be watered twice per month by the Contractor at the rate of 110 L (30 gallons) per tree per watering for the months May through October, and once per month at the rate of 110 L (30 gallons) per tree for the months No-vember through April of the 12-month period following planting.

2. Shrubs planted in upland areas shall be watered twice per month by the Contrac-tor at the rate of 40 L (10 gallons) per shrub per watering for the months May through October, and shall be watered once per month at the rate of 10 gallons per shrub for the months November through April of the 12-month period follow-ing planting. The contract performance bond, shall guarantee maintenance and

Public Buildings Service

SECTION 32 90 00

PLANTING

100% Design – Issue for Bid 32 90 00-11 October 19, 2016 \\uspsw2pfpsw001\Data\Data_USPSW2VFP001\Environment\Piscataway\Project\GSA\60436364 Belle Mead Design\500 Deliverables\503 North Parcel Issue for Bid Design\Specifications\32 - Exterior Improvements\32 90 00 Planting.docx replacement work during the plant establishment period. If all other Work is com-pleted on Project, no contract time will be charged during the plant establishment period.

END OF SECTION

SECTION 32 90 00 TABLES ARE ATTACHED

Public Buildings Service

SECTION 32 90 00

PLANTING

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TABLES 32 90 00 – 1A-1E

PLANTS, TREES, AND SHRUB QUANTITIES