329300_PLANTINGFINEGRADING_CAR2015_2_BID_revised_2014_06_24.pdf

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SECTION

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PART 1

1.1 S

A. T

1.2 R

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031814 PLANTING AND FINE GRADING

1.4 APPLICABLE STANDARDS

A. The references listed herein shall be the standards used for the Work, unless noted otherwise: All standards shall include the latest additions and amendments as of the date of advertisement for bids.

1. ANLA: American Nursery & Landscape Association

a. American Standard for Nursery Stock, ANSI Z60.1-2004

B. American National Standards for Tree Care Operations, ANSI A300. American National Standards Institute, 11 West 42nd Street, New York, N.Y. 10036.

1.5 DEFINITIONS

A. Balled and Burlapped Stock (B&B): Exterior plants dug with firm, natural balls of earth in which they are grown; wrapped, tied, rigidly supported, drum-laced and sized as recommended by

ANSI Z60.1.

B. Containerized or 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 rootball shape and protect root mass during shipping and shall be sized according to ANSI Z60.1 for kind, type, and size of exterior plant required.

C. Final Acceptance: Date at which all Work, including work identified in the ”Punch List”, is completed and accepted by the Contracting Officer. Warranty and maintenance periods do not begin until final acceptance.

D. Finish Grade: Elevation of finished fine graded surface of planting soil.

E. Girdling Root: A root that has become wrapped around the trunk of the plant that over time will inhibit the uptake of nutrients and produce structural failure, eventually leading to death of the plant.

F. Long Term Storage (of Plants): Equal to a period of three weeks or more after digging of the plants at the nursery, or a period of one week or more after receipt of plants at the Project Site

G. Planting Soil for Soil Profiles: Soil produced on- or off-site by homogeneously blending mineral soils or sand with stabilized organic soil amendments to produce topsoil or planting soil. See Section 32 91 19 “Planting Soil System - Installation.”

H. Plugs: A seedling raised in a manufactured soil mix in individual cells ready for transplanting.

I. Root Flare: Also referred to as trunk flare, root crown, or root collar. The transition zone between the main stem and the root system, visible as the outwardly curving base of a tree where it joins the roots, often distinguishable as individual root buttresses.

J. Subgrade: Surface or elevation of subsoil remaining after completing excavation, or top surface of a fill or backfill, before placing planting soil. See Section 31 20 00 “Earthwork”.

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K. Tagging / Tagged / Tag: The Contracting Officer’s selection of plant material at the nursery. An individually numbered seal is placed on the north-facing branches of a tagged plant.

1.6 ACTION SUBMITTALS

A. Product Data: Provide for each element of construction listed.

1. Plant Anchoring Systems.

2. Natural burlap.

B. Samples: Provide for each element of construction listed.

1. Mulch: At least three pint-bags of aged milled leaf mulch of the type to be used on this project.

2. Plant anchoring system, all components.

C. Photographs of Plants taken at the Nursery Source: Provide representative images of plants prior to scheduling tagging trips and as the basis for the Contracting Officer to select plants.

1. Contractor shall label each photograph with the plant species botanical name, nursery name, and date of photograph.

2. Photographs shall include images showing the full range of characteristics of each plant including detailed photographs of the bark, the base of the tree (rootball crown), leaves if present, branching structure, form, and habit.

3. Images shall include a scale figure or measuring device to indicate true size.

4. Photographs may be transmitted electronically but the title of electronic files must bear the plant name, nursery, and date.

5. For container plants, also provide close up photographs of the rootball with the container removed.

a. Quantity: 10% of the total number specified.

1.7 INFORMATIONAL SUBMITTALS

A. Installer Qualifications: In addition to requirements of Section 01 33 23 “Submittal Procedures,” provide qualifications for the Project Manager and Foreman/Site Supervisor showing years of experience, and a minimum of three project references. For each reference list client, design or engineering professional hired by the client, type, cost and duration of project and role of personnel.

B. Periodic Construction Images: In addition to the requirements in Section 01 32 33 “Photographic Documentation for Historic Preservation Projects,” provide the following images:

1. Rootball immediately prior to backfill.

a. Frequency: During planting operations, provide images of a half-dozen trees two times a week during planting activities.

C. Plant Species and Source List: The Contractor shall maintain an up-to-date plant species and source list indicating the plant botanical and common name, size, quantity, form, rootball, JEFF - 181202 32 93 00-4 identification of fall dig hazards, limb height (if applicable), nursery source, including contact information, and Contracting Officer’s seal number.

1. Plant list shall clearly indicate deviations from the specified plant list and any proposed substitutions.

2. Contractor shall confirm nursery source prior to scheduling tagging trip.

3. As the project progresses and plants are located and sealed, revise and re-submit the plant list submittal.

D. Planting Schedule: Indicating anticipated planting dates for performing all Work within this Section, coordinated with the Project. Coordinate and incorporate work in Sections 32 91 00 “Planting Soil System”, 32 80 00 “Irrigation”.

1.8 QUALITY ASSURANCE

A. Pre-installation Conference: A pre-installation conference with the Contracting Officer is required for the work of this Section.

B. Integrated Exterior Mockup: Required for the work of this Section.

1. General:

a. Mockups shall be In-Situ, and the approved mockup shall become part of the final Work.

b. The Mockups will be reviewed at each stage of construction. The Contractor shall not cover installed work until approved by the Contracting Officer.

c. Work with the Contracting Officer to select the location and extent of the mockup.

Each mockup shall be in a sloped location, approximately 1600 SF in extent, and shall include 2 trees of 3” caliper minimum.

2. Mockup #1: Soil Installation and Tree Planting in EX-1 Soil Area. The mockup shall demonstrate all materials and methods used to build the planted slope including:

a. Underdrains.

b. Protection of Existing Soil within the Vegetation and Soil Protection Fence.

c. Repair to existing soils disturbed as part of the Work.

d. Soil Profile Installation.

e. Tree Planting.

3. Mockup #2: Soil Installation and Tree Planting in SP-2 Soil Area. The mockup shall demonstrate all materials and methods used to build the planted slope including:

a. Soil Profile Installation, including geofibers.

b. Tree Planting.

c. Fine Grading.

C. Installer Qualifications: In addition to the requirements of Section 01 40 00 “Quality Requirements”, provide the following:

1. The Contractor shall have been in business a minimum of two years.

JEFF - 181202 32 93 00-5

2. The Contractor’s record of successful in-service performance shall include the installation of manufactured planting soils similar to the specification in Section 32 91 19 “Planting Soil System - Installation”.

3. Installer's Field Supervision: Require Installer to maintain an experienced full-time supervisor on Project site when planting is in progress. Field Supervisor shall have a minimum of five years’ experience.

D. Labeling: Label at least one specimen of each variety and size with a securely attached, waterproof tag bearing legible designation of botanical and common name in compliance with the recommendations of the American Nursery & Landscape Association.

E. 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. Measure main body of tree or shrub for height and spread; do not measure branches or roots tip-to-tip.

F. Pruning: Unless otherwise noted, pruning of plants before, during or after installation shall be prohibited except to remove dead or broken branches and limbs. Confer with the Contracting Officer before any pruning.

1. Pruning plants after the Contracting Officer’s selection and prior to delivery to the site shall be cause for rejection.

G. PROJECT CONDITIONS Planting Seasons: Work only within seasonal limitations for proper planting as follows:

Item Spring Season Fall Season Deciduous (container) Mar. 1 to May 30 Sept. 1 to Nov 30 Deciduous (B&B) Mar. 1 to May 7 Sept. 15 to Nov 30 Platanus x occidentalis Mar. 1 to May 31 London Planetree (Owner Provided) Groundcover April 1 to May 30 Sept. 15 to Nov 15 Perennials April 15 to May 30 Sept. 15 to Nov 15

H. Water: In addition to the requirements of Section 01 50 00 “Temporary Facilities and Controls”, provide the following:

1. Water will be provided by the Government and available on site. The Contractor shall immediately notify the Contracting Officer in writing if water is insufficient for work and plant maintenance operations.

2. Provide all hoses and equipment to distribute water to area of landscape work and areas needing watering. Provide water tank trucks if water service is interrupted. Prior to providing water tank trucks, submit to Contracting Officer for review and approval.

1.9 ACCEPTANCE AND MAINTENANCE

A. Request for Acceptance: In writing, request Contracting Officer’s inspection for acceptance at least 10 days in advance of preferred inspection date. Do not request inspection for acceptance until work is 100% complete (not including maintenance) and in compliance with the Contract requirements.

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1. Partial Acceptance: Acceptance of partial areas or portions of the total work may be granted, at the Contracting Officer’s option, if the area to be inspected for acceptance is large, well defined, and easily described. The Contracting Officer is not obligated to provide partial acceptance of the work.

2. Maintenance Period: Completely maintain plants and trees from date of receipt from nursery to 60 days after Final Acceptance.

a. Maintenance Activities: Provide complete maintenance and service as required to promote and maintain healthy growth including, without limitation, watering, weeding, fallen leaf removal, treatment for insects and disease, resetting plants to proper grade and upright position, and other operations and maintenance work.

Throughout the maintenance period, restore planting saucers and mulch, and keep mulch beds weed free. Tighten and adjust rootball fixing system to keep trees in vertical position.

1.10 WARRANTY

A. Warranty: Provide written warranty agreeing to remove and replace work that exhibits defects in materials or workmanship for the specified periods. "Defects" is defined to include death, unsatisfactory growth, disease, insect infestation, abnormal foliage density, abnormal size, abnormal color, failure to thrive, and other unsatisfactory characteristics.

1. Warranty Period

a. For Processional Walk Trees (Platanus x acerifolia ‘Bloodgood’): Two years from date of Final Acceptance.

b. For all other plants: One year from date of Final Acceptance.

2. If the Contractor disagrees with the planting practices herein specified, he/she shall state them in writing at least 60 days before planting work commences. Failure to present this written notice shall be interpreted as acceptance of the planting practices specified herein.

3. Replacement: Replace defective work with new material of same species, size, character, and quality of originally accepted work. With each replacement material, provide a new one year warranty for the replacement work. If a replacement is unacceptable during its second one year warranty, the Contractor shall provide another replacement or, when approved by the Government, equivalent cash payment.

4. Replacement Planting Seasons: The replacement period for plant warranty work shall comply with the Planting Seasons specified herein. Electing to plant outside of the specified Planting Seasons shall not absolve the Contractor from providing the warranty.

5. Repair of Adjacent Work After Warranty Replacement: Contractor shall return all adjacent elements and systems modified during removal and replacement of plants to the condition in which they were found, including shrub and perennial planting, planting soils and drainage.

6. Government Responsibility and Warranty Exclusions: The Contractor's warranty shall exclude problems due to improper or inadequate maintenance, vandalism or acts of nature.

a. During the warranty period, the Contractor shall visit the site at least three times during the growing seasons to review the conditions of the accepted work. The Contractor shall submit in writing to the Government regarding the Government’s

PART 2

2.1 P

A. S

B. C

2.2 G

A. T

2.3 P

A. T

B. C

2.4 S

A. T tial and Propr b.

PRODUCT

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1. Tagging: At least three weeks prior to the expected planting date, request, in writing, the Contracting Officer’s inspection of plant material at the nursery. Provide photographs beforehand if requested by the Contracting Officer.

a. The Contracting Officer will make his/her own travel arrangements to the nursery.

b. Seals placed on the selected plants at the nursery shall remain on the plants until Final Acceptance of the work.

2. The Contracting Officer’s basis of plant selection will include:

a. Conformance with specified genus, species, variety, size, form, rootball and quality.

b. The visual characteristics of the plants.

c. Plant health.

d. Adherence of the nursery to cultural practices and maintenance procedures that are at or above industry standard.

3. On-Site Inspection:

a. The Contractor shall permit the Contracting Officer to inspect plants upon their arrival to the project site and at any time prior to planting. The Contracting Officer will inspect the plant materials for size and condition of rootballs and/or root systems, insects, injuries, defoliation, wind burn and latent defects. The Contractor shall remove plant material that is unsatisfactory or defective and replace the plants at no additional cost to the Government.

b. The Contracting Officer may reject a specific nursery source and associated plants if he/she determines before, during or after receipt of plants, any of the following:

1) The nursery stock does not meet health standards set forth herein, including disease and infestation.

2) The nursery stock does not meet the requirements of the Contracting Officer’s basis of selection as stated herein.

3) The nursery cannot supply the specified plant(s) or an acceptable substitute cultivar or species.

B. Substitutions

1. In the event that the Contractor is unable to obtain the plant material specified, either because of unavailability or the failure of the plant material to meet the quality requirements of this Section, the Contractor shall provide substitute plants of equal size, quality and value to the plant originally specified. The substitute plants shall conform to all requirements of this Section.

2.5 DIGGING SEASON

A. Plants shall be delivered freshly dug. Plants that have been pre-dug the previous season shall not be accepted.

1. Spring Dig: Plants shall be dug as early as possible and as determined by the nursery owner, and no later than bud break.

a. Do not transport plants within 14 days after bud break.

2. Fall Dig: Plants shall be dug following leaf senescence.

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a. Fall Dig Hazard: Many species of trees or shrubs are considered “Fall Transplanting Hazards” by the nursery trade. Fall Transplanting Hazards are to be transplanted only during the spring digging season. The Contractor shall identify Fall Transplanting Hazards from the plant schedule, and factor the proper handling of these trees into the overall sequencing of construction. The Contractor shall notify the Contracting Officer of any conflicts arising from this analysis of the plant list. Fall Dig Hazards are listed on the Drawings.

2.6 PLANT MATERIALS - GENERAL

A. General: Furnish specimen nursery-grown plants of genus, species, and cultivar specified complying with ANSI Z60.1, with healthy root systems well provided with fibrous roots 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. All parts of the plant shall be moist and show active green cambium when cut. Plants will be densely foliated when in leaf.

B. Grade: Provide plants of specified height, caliper, sizes and grades complying with ANSI Z60.1 for type of plants required.

1. Larger Stock: Plants larger than required may be used if approved by the Contracting Officer if rootball is proportionately larger, and if there is no change in Contract Price.

2. Undersize Stock: If approved by the Contracting Officer, plants may be undersized as long as not more than 10% of plants smaller than required are used. If more than 10% undersized plants are used, then an 25% of the undersized plants shall be provided at no additional expense to the Government.

C. Hardiness: Provide plant stock certified to have been grown within hardiness Zones 2 through 6 as established by the USDA’s Plant Hardiness Zone Map. Submit certification if so requested by the Contracting Officer.

D. Plant Character: All plants shall be typical of their species or variety and shall have a normal habit of growth and be legibly tagged with the proper name. Form and size shall comply with

ANSI Z60.1.

1. Canopy Trees: Well defined trunk flare, straight trunk, and single stem. Co-dominant leaders shall not be accepted. Evidence of equal increments of growth over the prior three seasons shall be discernible.

a. Matched Trees: Provide the following trees with matching overall form and branching, including overall height, height of first branch, width of crown and general placement and frequency of branching:

1) Taxodium distichum

2. Multistem Trees: Branched or pruned naturally according to species and type, with relationship of caliper, height, and branching according to ANSI Z60.1

3. Shrubs: Multi-stemmed plants complying with ANSI Z60.1 for the species indicated.

4. Groundcover: Provide groundcover of species indicated, established and well rooted in pots or similar containers, and complying with ANSI Z60.1.

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5. Herbaceous Plants: Provide healthy plants from a commercial nursery, of species and variety shown or listed.

a. Upon award of Bid, the Contractor shall arrange for all species or quantities of species require contract growing.

6. Herbaceous Plugs: All plants shall be typical of their species or variety and shall have a normal habit of growth.

a. Provide fully rooted with a diameter of 1.5 inches, and a depth of 2.5” inches.

E. Trunk: The height of the trees shall be in accordance with ANSI Z60.1. No part of the trunk shall be conspicuously crooked as compared with normal trees of the same variety, for example ‘S’ curves shall not be allowed. The trunk shall be free from sunscald, frost cracks, or wounds resulting from abrasions, fire or other causes. No pruning wounds shall be present having a diameter exceeding one inch and such wounds must show vigorous bark on all edges.

F. Rootballs:

1. General:

a. The diameter and depth of rootballs shall be sufficient to encompass the fibrous and root feeding system necessary for the healthy development of the plant in accordance with ANSI Z60.1., or the minimum rootball diameter shown, whichever is larger.

1) If the root flare is buried 2” or more, provide a larger diameter or greater depth rootball to compensate for the buried root flare, as the soil overburden shall be removed prior to planting, which effectively reduces the size of the rootball.

b. No plant will be accepted when the ball of earth surrounding its roots has been cracked or broken prior to or during the process of planting or after the burlap, staves, ropes or platform required in connection with its transplanting have been removed. The rootballs shall remain intact during all operations.

c. Girdled Roots: Inspect root crown for girdling roots. Inspection for girdled roots shall be done at the nursery to the extent possible. If girdled roots are not visible at the nursery and are revealed before acceptance, any plant with a girdled root over 1/2” shall be rejected.

2. Balled and Burlapped: All plants to be moved balled and burlapped shall be moved with the root systems as solid units with balls of earth firmly wrapped with burlap, firmly held in place by a stout cord and drum lacing, or wire basket. Burlap for containing rootballs shall be untreated, made from biodegradable natural fibers.

2.7 CONTAINER STOCK:

A. Container stock shall have a full container of well-developed root system. Plants loose in the container are not acceptable. The root zone shall be free of circling or kinked roots. Large matted roots at the sides or bottom of the container will not be accepted. Staked plants must be self-supporting when unfastened from the stake. Container grown plants may be substituted for balled and burlapped material if approved by the Contracting Officer.MULCH

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2.8 P

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2.9 M

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2.10 T

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PART 3

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C. Deliver materials and plants only after preparations for planting have been completed and accepted, including but not limited to: planting soil system, irrigation (minimum: Mainline), rough grading, utilities, decompaction or remediation of soils. The Contracting Officer will determine when the site is acceptable for planting.

3.2 HANDLING OF PLANTS

A. 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.

B. Provide a double tarp protective covering over exterior plants during transport.

C. Do not drop exterior plants during delivery.

D. Do not loosen drum-lacing nor remove container-grown stock from containers before time of planting.

E. Do not move trees if rootballs are saturated.

F. Handle planting stock by supporting the rootball or container.

3.3 TEMPORARY STORAGE OF PLANTS

A. Storage – General

1. For plants stored on or off-site for more than 24 hours, the Contractor shall keep a log that records dates of watering.

2. The contractor shall fully inspect and maintain plants for the entire duration of the storage period.

3. All stored plants shall remain the property of the Contractor and shall be replaced in kind to meet the standards defined herein for healthy plants and the character and habit defined herein. The Contracting Officer shall be the sole evaluator of whether replacement plants match the originally stored plants.

4. No plant shall be stored more than four weeks without written acceptance by the Contracting Officer.

B. Storage of plants less than one week:

1. If planting is delayed more than six hours after delivery of plants to the site, the contractor shall adhere to the following practices:

a. Set plants in shade, protect from weather and mechanical damage, and keep roots moist.

b. Store plants upright with room between rootballs.

c. Closely monitor plants for sufficient root moisture.

d. Store all plant materials in a secure and clean location, free from conditions that would be harmful and/or deleterious to the immediate or long-term health of the trees.

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C. Storage of plants more than one week:

a. The Contractor shall store plants at a location mutually agreed upon by the Contractor and Contracting Officer.

b. Space plants sufficiently apart to prevent damage or death to branches and leaves.

During all seasons, set balled stock upright and plumb on firm ground and cover the ball with fully aged and decomposed wood mulch or other material acceptable to the Contracting Officer

c. During the growing season, stored plant material shall be watered and the rootballs kept moist with an automatic drip irrigation system to prevent drying out. Mist plants several times a day as necessary to reduce transpiration in sunny or windy locations.

d. During the dormant season, rootballs shall be insulated against freezing and cold weather damage. Plants shall be protected from wind and ice damage.

e. During the storage period, inspect all plants for pests and diseases and, if found, have them evaluated by an arborist certified in the state where the project is located.

1) Before proceeding, report on the presence of any diseases or pests.

2) Before proceeding, report on issues and recommended treatment to the Contracting Officer for review and approval.

3) Whenever possible, select and use organic treatments.

4) Isolate trees with diseases or pests and remove and replace if the Contracting Officer determines that the plants are unusable.

3.4 PLANT LAYOUT

A. Horizontal Layout: The plant locations shown on the Drawings are approximate. The Contractor shall layout the final location of individual plants by stake or flag and obtain the Contracting Officer’s approval of locations before starting installation. After staking is accepted, set plants in place for final review and acceptance by the Contracting Officer. The Contractor shall make revisions and adjustments as directed by the Contracting Officer.

1. Contractor shall not stake plant locations until proper subgrade, drainage, and subsoil layers are installed.

2. Indicate the species and size of plant on the stake or flag.

B. Vertical Layout: Set the elevation of trees through the use of string lines or by instrumentation.

Demonstrate to the Contracting Officer through the use of stakes and string that trees have been set at the correct elevation prior to completing planting and installing S1 soils, if requested.

3.5 PLANTING WOODY PLANTS

A. General

1. Sequence of Planting: Plant trees and shrubs after the subgrade has been accepted and concurrently with the horticultural subsoil planting soil layer unless otherwise approved by the Contracting Officer. Complete landscaping work as quickly as possible on portions of the site as they become available for landscaping.

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2. If plants are installed in planting pits, scarify sides of pits before placing trees.

3. Grade stakes: If present, protect and maintain grade stakes and location stakes until removal is acceptable to the Contracting Officer and all parties involved in this project.

If grade stakes are not present, establish grade stakes to ensure that grades shown on the Drawings are being met.

4. Painting: Do not paint vegetation for any reason.

B. Rootball and Rootflare

1. Rootball Pedestals: Provide a rootball pedestal composed of subgrade fill immediately beneath the ball or root mass. Pedestal shall provide the relationship to finish grade described below and prevent settlement of the plant. Compact pedestal to 95% Standard Proctor.

2. Identifying and Exposing the Root Flare: Prior to setting the height of the rootball pedestal, the Contractor shall remove burlap and twine from the top of the rootball and inspect each plant to determine if the trunk flare is buried within the rootball. If buried, the Contractor shall expose the trunk flare by removing excess fill on top of rootball, taking care not to damage the bark or roots while removing the soil overburden.

Adventitious roots and girdling roots shall be removed with sharp pruners. Adjust the rootball pedestal to position the trunk flare 2”-3” higher than the proposed finished grade.

3. Wire Baskets: Once set, completely remove top one-third of wire basket. Cleanly cut each tier of horizontal wires making one cut centered between each set of vertical wires.

a. Burlap: Completely remove top one-third of burlap.

4. Drum lacing and Burlap: Once set, remove top one-third of lacing and burlap.

5. Containerized plants: Completely remove container. Cut out container with a sharp blade if container does not readily separate from the rootball.

6. Scarification of Balled and Burlapped Plants: The Contracting Officer will examine the exposed rootball and determine if the Contractor shall scarify of the sides of the rootball.

Scarification shall result in no additional expense to the Government.

7. Scarification of Containerized Plants: The Contractor shall scarify the rootballs of container plants with a sharp blade 2” in length. Rest the plant on its side and scarify an ‘X’ on the bottom of the root mass. Then make vertical cuts that are the full height of the rootball every 3” o.c of the full circumference.

8. Rootballs shall be kept in a moist, but not wet, condition. Protect rootballs from damage due to sun and wind. Contractor shall strictly limit the time between exposing the rootball and backfilling. Protect exposed rootballs with burlap or other shading device until backfilled.

C. Placement of Planting Soil Mixture at Woody Plants: Place planting soil mix to levels shown on Drawings and described in Section 32 91 19 “Planting Soil System - Installation”.

1. Maintain at all times during the planting operations at least one stockpile of each approved type of plant soil mixture.

2. Planting soil shall be in full contact with the rootball, with no voids or air pockets. Where burlap is present, burlap shall be tightly pressed between backfill and rootball. Folded or bunched burlap will create an obstruction to backfill and rootball contact and shall be removed.

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3. Backfilling of Tree Pits in EX-1 Soil: Backfill with planting soil mix in 6” layers.

Handtamp each layer to eliminate voids and air pockets before placing subsequent layers.

Continue until backfill has reached finish grade shown on the Drawings.

4. Watering Dish and Mulch: To promote water to collect and seep into the root zone form a watering saucer around the tree using the S1 soil layer as shown in the Drawings. Hand tamp edges of dish to be firm and withstand hose pressure. Cover waterish dish with mulch, leaving a 4” gap between mulch and the trunk.

D. Watering:

1. Flood all plants with water twice within the first 24 hours after planting. Take care to avoid saturating adjacent soils where planting operations are ongoing. Monitor water pressure. Displacement of soil materials by watering shall not be acceptable.

E. Plant Anchoring System: Install tree stakes immediately after planting to maintain trunk plumb.

1. Bamboo Staking: Wrap bamboo stake with a minimum of five layers of burlap where stake is in contact with tree trunk.

3.6 PLANTING POTTED HERBACEOUS PLANTS

A. The Contractor shall scarify the rootballs of container plants. Using a sharp knife, make vertical cuts the full height of the rootball at a depth of 2” and every 3” o.c.

3.7 PLANTING HERBACEOUS PLUGS

A. Install the plug so the stem base is at or slightly above finish grade. Plant plugs fully into planting soil, not mulch.

B. Install plugs to their full depth. A “J-Root” installation shall not be acceptable.

C. Tamp each plug in place so that it is firmly seated in the soil, with no air pockets.

3.8 APPLICATION OF LIQUID BIOLOGICAL AMENDMENT

A. Refer to Section 32 93 10 “Liquid Biological Amendment.” (NOT IN CONTRACT)

3.9 SOIL DIAGNOSTICS DURING THE MAINTENANCE PERIOD

A. If plants exhibit unsatisfactory growth during the maintenance period, perform soil testing for chemical properties, compaction and infiltration rates. See Section 32 92 00 “Lawn” for testing definitions. Coordinate with testing defined in Section 32 93 10 “Liquid Biological Amendment (LBA)”. Adhere to Contracting Officer’s recommend remediation. Remediation may include, but are not limited to, soil amendments, LBA treatments (NOT IN CONTRACT), or soil decompaction.

3.10 FINE GRADING

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A. Prior to fine grading, Contractor shall verify that the rough grading, under drainage system, planting soil mixes, planting of woody plants and irrigation system have been accepted.

B. Fine Grading: Set finished grades by instrumentation and in accordance with Section 01 73 40, “Execution”. At minimum, set stakes at the bottom, middle, and top of slopes and at the edges and centers of plant beds. Connect contours and spot elevations with an even slope.

1. Fine grade planted areas shall have an even surface free from ridges, rills or depressions.

Surface of planting soil shall be free draining have a fine texture.

2. All large stiff clods, lumps, brush, roots, litter and other foreign matter, and stones over one inch in diameter, shall be removed from the planting soil surface. Planting soil shall be free of smaller stones in excessive quantities as determined by the Contracting Officer.

3.11 PROTECTION, REPAIR AND CLEANUP

A. Protect new and existing site improvements from damage due to planting operations.

1. Underdrainage and Irrigation: Underdrainage and elements of the Irrigation System will be in place when planting activities begin. The contractor shall coordinate with the work of those Sections, and shall take all precautions to prevent damage to them. If damage occurs, the Contractor shall stop work and immediately report the damages to the Contracting Officer. Work shall not resume until all work is repaired, inspected and accepted by the Contracting Officer.

2. The Contractor shall pay for all remediation to damages.

B. In addition to the requirements of Section 01 73 40 “Execution”, limit all conditions that retard the growth of the plants, whether installed or when in storage.

C. The Contractor shall be strictly prohibited from tracking or driving over newly planted areas.

1. In areas where tracking or driving cannot be avoided, the Contractor shall install a protective barrier as approved by the Contracting Officer.

D. Restore areas disturbed by planting activities, or if otherwise eroded, settled, or disturbed after fine grading, and prior to lawn installation.

E. Tags: Remove all identification labels, seals and tags at final acceptance of the project.

END OF SECTION