HomeMy WebLinkAbout32 92 00 Turf and GrassesTHE KENT
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SECTION 329200 - TURF AND GRASSES
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
1.2 SUMMARY
A. Section Includes:
1. Seeding
2. Sodding
1.3 DEFINITIONS
A. Finish Grade: Elevation of finished surface of planting soil.
B. Pesticide: A substance or mixture intended for preventing, destroying, repelling, or mitigating a
pest. Pesticides include insecticides, miticides, herbicides, fungicides, rodenticides, and
molluscicides. They also includes substances or mixtures intended for use as a plant regulator,
defoliant, or desiccant.
C. Pests: Living organisms that occur where they are not desired or that cause damage to plants,
animals, or people. Pests include insects, mites, grubs, mollusks (snails and slugs), rodents
(gophers, moles, and mice), unwanted plants (weeds), fungi, bacteria, and viruses.
D. Planting Soil: Existing, on-site soil; imported soil; or manufactured soil that has been modified
with soil amendments and perhaps fertilizers to produce a soil mixture best for plant growth.
See Section 329113 "Soil Preparation Specification and drawing designations for planting soils.
E. Subgrade: The surface or elevation of subsoil remaining after excavation is complete, or the top
surface of a fill or backfill before planting soil is placed.
1.4 SUBMITTALS
A. Qualification Data: For landscape Installer.
B. Certification of Grass Seed: From seed vendor for each grass-seed monostand or mixture,
stating the botanical and common name, percentage by weight of each species and variety, and
percentage of purity, germination, and weed seed. Include the year of production and date of
packaging.
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1. Certification of each seed mixture for turf grass and sod. Include identification of source
and name and telephone number of supplier.
C. Material Test Reports: For existing surface soil, manufactured or imported soil and planting
mixes.
D. Maintenance Instructions: Recommended procedures to be established by Owner for
maintenance of turf and grasses during a calendar year. Submit before expiration of required
maintenance periods.
1.5 QUALITY ASSURANCE
A. Installer Qualifications: A qualified landscape installer whose work has resulted in successful
establishment of materials specified.
B. Soil-Testing Laboratory Qualifications: An independent laboratory, recognized by the State
department of Agriculture, with the experience and capability to conduct the testing indicated
and that specializes in types of tests to be performed.
C. Topsoil and Planting Soil Analysis: See Planting Soil Specification 329113
1.6 DELIVERY, STORAGE, AND HANDLING
A. Seed and Other Packaged Materials: Deliver packaged materials in original, unopened
containers showing weight, certified analysis, name and address of manufacturer, and
indication of compliance with state and Federal laws, as applicable.
B. Sod: Harvest, deliver, store, and handle sod according to requirements in "Specifications for
Turf grass Sod Materials" and "Specifications for Turf grass Sod Transplanting and Installation"
sections in TPI's "Guideline Specifications to Turf grass Sodding." Deliver sod within 24 hours of
harvesting and in time for planting promptly. Protect sod from breakage and drying.
C. Bulk Materials:
1. Do not dump or store bulk materials near structures, utilities, walkways and pavements,
or on existing turf areas or plants.
2. Provide erosion-control measures to prevent erosion or displacement of bulk materials;
discharge of soil-bearing water runoff; and airborne dust reaching adjacent properties,
water conveyance systems, or walkways.
3. Accompany each delivery of bulk materials with appropriate certificates.
1.7 FIELD CONDITIONS
A. Planting Restrictions: Plant during one of the following periods. Coordinate planting periods with
initial maintenance periods to provide required maintenance from date of Substantial
Completion.
1. Spring Planting: April 1 to May 15
2. Fall Planting: August 25-September 15 or as approved.
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B. Weather Limitations: Proceed with planting only when existing and forecasted weather
conditions permit.
PART 2 - PRODUCTS
2.1 SEED
A. Grass Seed: Fresh, clean, dry, new-crop seed complying with AOSA's "Rules for Testing
Seeds" for purity and germination tolerances.
B. Seed Species:
1. Quality: State-certified seed of grass species as listed below for solar exposure.
2. Quality: Seed of grass species as listed below for solar exposure, with not less than 95
percent germination, not less than 85 percent pure seed, and not more than 0.5 percent
weed seed:
3. Full Sun: Perennial Rye and Kentucky full sun 50-50% Perennial Ry KY blue minimum 4
varieties (2 each)
a. 50 percent Kentucky bluegrass (2 varieties)
b. 50 percent perennial rye grass (2 varieties)
4. Partial Shade: Perennial Rye, Kentucky Bluegrass, and Red Fescue
a. 10 percent Kentucky Blue Grass (1 variety).
b. 35 percent Perennial Rye (1 variety).
c. 55 percent Red Fescue (2 varieties)
2.1 TURF GRASS SOD
A. Turf grass Sod: complying with "Specifications for Turfgrass Sod Materials" in TPI's "Guideline
Specifications to Turf grass Sodding." Furnish viable sod of uniform density, color, and texture
that is strongly rooted and capable of vigorous growth and development when planted.
B. Turf grass Species: Sod of grass species as follows, with not less than 85 percent germination,
not less than 95 percent pure seed, and not more than 0.5] <Insert number> percent weed
seed:
1. Full Sun: Kentucky bluegrass (Poa pratensis), a minimum of three cultivars.
2. Sun and Partial Shade: Proportioned by weight as follows:
a. 50 percent Kentucky bluegrass (Poa pratensis).
b. 30 percent chewings red fescue (Festuca rubra variety).
c. 10 percent perennial ryegrass (Lolium perenne).
d. 10 percent redtop (Agrostis alba).
3. Shade: Proportioned by weight as follows:
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a. 50 percent chewings red fescue (Festuca rubra variety).
b. 35 percent rough bluegrass (Poa trivialis).
c. 15 percent redtop (Agrostis alba).
2.2 FERTILIZERS
A. Bonemeal: Commercial, raw and steamed, finely ground; a minimum of 4 percent nitrogen and
20 percent phosphoric acid.
B. Superphosphate: Commercial, phosphate mixture, soluble; a minimum of 20 percent available
phosphoric acid.
C. Commercial Fertilizer: Commercial-grade complete fertilizer of neutral character, consisting of
fast- and slow-release nitrogen, 50 percent derived from natural organic sources of urea
formaldehyde, phosphorous, and potassium in the following composition:
1. Composition: Nitrogen, phosphorous, and potassium in amounts recommended by
Topsoil Analysis report from a qualified soil-testing laboratory.
D. Slow-Release Fertilizer: Granular or pelleted fertilizer consisting of 50 percent water-insoluble
nitrogen, phosphorus, and potassium in the following composition:
1. Composition: Nitrogen, phosphorous, and potassium in amounts recommended by Top
Soil Analysis report from a qualified soil-testing laboratory.
2.3 MULCHES
A. Straw Mulch: Provide air-dry, clean, mildew- and seed-free, salt hay or threshed straw of wheat,
rye, oats, or barley.
B. Fiber Mulch: Biodegradable, dyed or natural wood, cellulose-fiber mulch; nontoxic and free of
plant-growth or germination inhibitors; with a maximum moisture content of 15 percent and a pH
range of 4.5 to 6.5.
C. Nonasphaltic Tackifier: Colloidal tackifier recommended by fiber-mulch manufacturer for slurry
application; nontoxic and free of plant-growth or germination inhibitors.
D. Asphalt Emulsion: ASTM D 977, Grade SS-1; nontoxic and free of plant-growth or germination
inhibitors.
2.4 EROSION-CONTROL MATERIALS – Refer to C-Series Drawings and Specs
PART 3 - EXECUTION
3.1 EXAMINATION
A. Examine areas to be planted for compliance with requirements and other conditions affecting
installation and performance of the Work.
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1. Verify that no foreign or deleterious material or liquid such as paint, paint washout,
concrete slurry, concrete layers or chunks, cement, plaster, oils, gasoline, diesel fuel,
paint thinner, turpentine, tar, roofing compound, or acid has been deposited in soil within
a planting area.
2. Suspend planting operations during periods of excessive soil moisture until the moisture
content reaches acceptable levels to attain the required results.
3. Uniformly moisten excessively dry soil that is not workable or which is dusty.
B. Proceed with installation only after unsatisfactory conditions have been corrected.
C. If contamination by foreign or deleterious material or liquid is present in soil within a planting
area, remove the soil and contamination as directed by Architect and replace with new planting
soil.
3.2 PREPARATION
A. Protect structures; utilities; sidewalks; pavements; and other facilities, trees, shrubs, and
plantings from damage caused by planting operations.
1. Protect adjacent and adjoining areas from hydroseeding overspray.
2. Protect grade stakes set by others until directed to remove them.
B. Install 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.
3.3 TURF AREA PREPARATION
A. General: Prepare planting area for soil placement and mix planting soil according to
Section 329113
B. Placing Planting Soil:
C. Newly Graded Subgrades: Loosen subgrade to a minimum of 4” (100m). Remove stones
larger than 1 inch (25mm) in any dimension and sticks, roots, rubbish, and other extraneous
matter and legally dispose of them off Owner’s property.
1. Apply fertilizer directly to subgrade before loosening.
2. Thoroughly blend planting soil mix off-site before spreading or spread topsoil, apply soil
amendments and fertilizer on surface, and thoroughly blend planting soil mix.
a. Delay mixing fertilizer with planting soil if planting will not proceed within a few
days.
b. Mix lime with dry soil before mixing fertilizer.
3. Spread planting soil mix to a minimum depth of 6” (100 mm), but not less than required to
meet finish grades after light rolling and 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 (50 mm) of subgrade. Spread
remainder of planting soil mix.
b. Reduce elevation of planting soil to allow for soil thickness of sod.
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D. Unchanged Subgrades: If lawns are to be planted in areas unaltered or undisturbed by
excavating, grading, or surface soil stripping operations, prepare surface soil as follows:
1. Remove existing vegetation. Do not mix into soil surface.
2. Loosen surface soil to a depth of at least 6 inches (150 mm). Apply soil amendments
and fertilzers according to planting soil mix proportions and mix thoroughly into top 4
inches (100 mm) of soil. Till soil to a homogeneous mixture of fine texture.
a. Apply fertilizer directly to surface soil before loosening.
3. Remove stones larger than ½” inch (25 mm) in any dimension and sticks, roots, trash,
and other extraneous matter.
4. Legally dispose of waste material, including grass, vegetation, and turf off Owner’s
property
E. Finish Grading: Grade planting areas to a smooth, uniform surface plane with loose, uniformly
fine texture. Grade to within plus or minus ½ inch (13 mm) of finish elevation. Roll and rake,
remove ridges, and fill depressions to meet finish grades. Limit fine grading to areas that can
be planted in the immediate future.
F. Moisten prepared area before planting if soil is dry. Water thoroughly and allow surface to dry
before planting. Do not create muddy soil.
G. Restore planting areas if eroded or otherwise disturbed after finish grading.
3.4 SEEDING
A. Sow seed with spreader or seeding machine. Do not broadcast or drop seed when wind velocity
exceeds 5 mph (8 km/h).
1. Evenly distribute seed by sowing equal quantities in two directions at right angles to each
other.
2. Do not use wet seed or seed that is moldy or otherwise damaged.
3. Do not seed against existing trees. Limit extent of seed to outside edge of planting
saucer.
B. Sow seed at a rate no less than 4 lb/1000 sq. ft. (1.4 to 1.8 kg/92.9 sq. m
C. Rake seed lightly into top 1/8 inch (3 mm) of soil, roll lightly, and water with fine spray.
D. Protect seeded areas with slopes exceeding 1:6 with erosion-control fiber mesh and 1:4 with
erosion –control blankets installed and stapled according to manufacturer’s written instructions.
E. Protect seeded areas with slopes not exceeding 1:6 by spreading straw mulch. Spread
uniformly at a minimum rate of 2 tons/acre (42 kg/92.9 sq. m) to form a continuous blanket 1-1/2
inches (38 mm) in loose thickness over seeded areas. Spread by hand, blower, or other suitable
equipment.
1. Bond straw mulch by spraying with asphalt emulsion at a rate of 10 to 13 gal./1000 sq. ft.
(38 to 49 L/92.9 sq. m). Take precautions to prevent damage or staining of structures or
other plantings adjacent to mulched areas. Immediately clean damaged or stained areas.
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3.5 HYDROSEEDING
A. Hydroseeding: Mix specified seed, fertilizer, and fiber mulch in water, using equipment
specifically designed for hydroseed application. Continue mixing until uniformly blended into
homogeneous slurry suitable for hydraulic application.
1. Mix slurry with fiber-mulch manufacturer's recommended tackifier.
2. Spray-apply slurry uniformly to all areas to be seeded in a one-step process. Apply slurry
at a rate so that mulch component is deposited at not less than 1500-lb/acre (15.6-
kg/92.9 sq. m) but not less than the rate required to obtain specified seed-sowing rate
3.6 SODDING
A. Lay sod within 24 hours of harvesting unless a suitable preservation method is accepted by
Architect / Landscape Architect prior to delivery time. Do not lay sod if dormant or if ground is
frozen or muddy.
B. Lay sod to form a solid mass with tightly fitted joints. Butt ends and sides of sod; do not stretch
or overlap. Stagger sod strips or pads to offset joints in adjacent courses. Avoid damage to soil
or sod during installation. Tamp and roll lightly to ensure contact with soil, eliminate air pockets,
and form a smooth surface. Work sifted soil into minor cracks between pieces of sod; remove
excess to avoid smothering sod and adjacent grass.
1. In areas exceeding a1:6 slope sod shall be anchored with wood pegs or steel staples as
recommended by bod provider.
2. Provide adequate moisture to sod and soil for initial (4) weeks after installation to ensure
establishment.
3.7 TURF RENOVATION
A. Renovate existing turf where indicated.
B. Renovate existing lawn in poor shape and existing lawn damaged by Contractor's operations,
such as storage of materials or equipment and movement of vehicles.
1. Reestablish turf where settlement or washouts occur or where minor regrading is
required.
C. Remove sod and vegetation from diseased or unsatisfactory turf areas; do not bury in soil.
D. Remove topsoil containing foreign materials, such as oil drippings, fuel spills, stones, gravel,
and other construction materials resulting from Contractor's operations, and replace with new
planting soil.
E. Remove weeds before seeding. Where weeds are extensive, apply selective herbicides as
required. Do not use pre-emergence herbicides.
F. Remove waste and foreign materials, including weeds, soil cores, grass, vegetation, and turf,
and legally dispose of them off Owner's property.
G. Till stripped, bare, and compacted areas thoroughly to a soil depth of 6 inches (150 mm).
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H. Apply soil amendments and initial fertilizer required for establishing new lawn and mix
thoroughly into top 4 inches (100 mm) of existing soil. Install new planting soil to fill low spots
and meet finish grades.
I. Apply seed and protect with straw mulch as required for new lawns.
J. Water newly planted areas and keep moist until new turf is established.
3.8 TURF MAINTENANCE
A. General: Maintain and establish turf by watering, fertilizing, weeding, mowing, trimming,
replanting, and performing other operations as required to establish healthy, viable turf. Roll,
regrade, and replant bare or eroded areas and remulch to produce a uniformly smooth turf.
Provide materials and installation the same as those used in the original installation.
3.9 SATISFACTORY LAWN
A. Lawn installations shall meet the following criteria as determined by Architect/ Landscape
Architect:
1. Satisfactory Seeded Lawn: At end of maintenance period, a healthy, uniform, close stand
of grass has been established, free of weeds and surface irregularities, with coverage
exceeding 90 percent over any 10 sq. ft. (0.92 sq. m) and bare spots not exceeding 3 by
3 inches
2. Satisfactory Sodded Turf: At end of maintenance period, a healthy, well-rooted, even-
colored, viable turf has been established, free of weeds, open joints, bare areas, and
surface irregularities.
3.10 RESTORATION AND RECOVERY OF UNSATISFACTORY LAWNS
A. Slit Seeding: In such condition that the initial seeding procedures fail to achieve a successful
lawn condition, slit seeding may be utilized as an in-fill technique to improve germination.
B. Overseeding and Lawn Recovery: The contractor shall submit a full Maintenance Program, in
writing, to the Owner detailing restoration procedures and schedules if the initial seeding fail to
achieve successful lawn establishment. The following tenets shall form the foundation of the
Program
1. Mowing
2. Weed Control, including herbicides or other methods
3. Fertilizing
4. Overseeding
C. Redundant Coordination: Should the Contractor Fail to achieve successful turf establishment
as a result of inattention, poor timing or general lack of effort as determined by the Landscape
Architect, the Consultant’s time and travel expenses will be reimbursed by the Contractor for
multiple site/punch visits and additional coordination or administration required to overcome
shortcoming.
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3.11 CLEANUP AND PROTECTION
A. Promptly remove soil and debris created by planting work from paved areas. Clean wheels of
vehicles before leaving site to avoid tracking soil onto roads, walks, or other paved areas.
B. Remove surplus soil and waste material, including excess subsoil, unsuitable soil, trash, and
debris, and legally dispose of them off Owner's property.
C. Erect temporary fencing or barricades and warning signs as required to protect newly planted
areas from traffic. Maintain fencing and barricades throughout initial maintenance period and
remove after plantings are established.
D. Remove erosion-control measures after grass establishment period.
3.12 MAINTENANCE SERVICE
A. Turf Maintenance Service: Provide full maintenance by skilled employees of landscape Installer.
Begin maintenance immediately after each area is planted and continue until acceptable turf is
established, but for not less than the following periods:
1. Seeded Turf: 60 days from date of Substantial Completion.
a. When initial maintenance period has not elapsed before end of planting season, or
if turf is not fully established, continue maintenance during next planting season.
2. Sodded Turf: 30 days from date of Substantial Completion.
END OF SECTION 329200