HomeMy WebLinkAbout32-92-20-Seeding-For-Lawn-Areas_Rev_1Dennis Yarmouth Intermediate Middle School January 19, 2021
Dennis Yarmouth Regional School District 100% Construction Documents
Perkins Eastman DPC, project #71011
32 92 20 SEEDING FOR LAWN AREAS
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Section 32 92 20
SEEDING FOR LAWN AREAS
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of Contract, including General and Supplementary
Conditions and Division 01 Specification sections, apply to work of this section.
B. Related Sections: The following Sections contain requirements that relate to this
Section:,
1. Section 32 92 00 - Soil Preparation for Lawn Establishment
1.2 DESCRIPTION OF WORK
A. Provide all materials, equipment, and labor necessary to complete the work as
indicated on the drawings or as specified herein.
B. The principal work of this section includes, but may not be limited to, the following:
1. Application of seed
2. Application of weed control
3. Maintenance of seeded areas
4. Acceptance of seeding
C. In general, seeded areas shall, at a minimum, include all areas of site within project
limit lines that have been disturbed or are barren unless otherwise noted on the
plans. Overseeding of established lawn areas, if required on plans, shall also
extend to the limit of disturbance (LOD), unless otherwise noted with a different
seed mix, refer to Plans.
1.3 QUALITY ASSURANCE
A. Subcontract seeding work to a firm specializing in such work unless Contractor is
fully experienced and qualified.
B. Each seed bag or container shall display a label which identifies the contents as a
true representation of the seed mix and percentages required by specification. No
seed shall be applied to a site until display labels are submitted to the Owner's
representative and has determined the mixture meets all requirements.
C. Do not make substitutions without written approval. If specified seed mixes are not
available, obtain approval for substitution from the Owner's representative.
1.4 SUBMITTALS
A. Certifications and/or blue tag labels of proposed seed mixtures stating common and
scientific names of grasses, percentages by weight, and percentages of
purity and germination.
B. Product information for all proposed weed control chemicals.
Dennis Yarmouth Intermediate Middle School January 19, 2021
Dennis Yarmouth Regional School District 100% Construction Documents
Perkins Eastman DPC, project #71011
32 92 20 SEEDING FOR LAWN AREAS
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1.5 PRODUCT DELIVERY, STORAGE AND HANDLING
A. Protect all products from weather or other damaging or deteriorating conditions.
B. Seed mixes which have been damaged or have deteriorated in transit or storage
are not acceptable.
C. Seeding Schedule: Prepare a proposed seeding schedule. Schedule dates for
each type of landscape work during normal seasons for such work.
Seeding: March 15 - June 30
August 15 - October 15
D. Correlate with specified maintenance periods to provide maintenance to date of
acceptance. Once the schedule is accepted, dates shall be revised and submitted in
writing for reasons of delay.
1.6 WARRANTY
A. Warranty seeding until final acceptance of grass stand. Final acceptance is defined
in Part 3 of this specification.
1.7 MAINTENANCE
A. Maintenance of seeding to be performed by the installer to ensure plant survival and
to eliminate undesirable species includes:
1. Watering
2. Mowing
3. Regrading and replanting eroded areas
4. Seeding or patching sparse or bare areas
5. Debris removal
6. Replacement of damaged or dead material
7. Additional fertilizations
8. Additional weed control
B. Maintain seeded areas immediately after placement until seed areas are accepted
as outlined in Part 3 of this specification.
PART 2 - PRODUCTS
2.1 MULCH
A. Hydro mulch: Shall be a Bonded Fiber Matrix Hydraulically applied erosion
system, consisting of long strand, virgin wood fibers (90% by weight), bound
together by a pre-blended, high-strength polysaccharide polymer adhesive (10%
by weight). The virgin wood fibers shall be thermo-mechanically defibrated from
clean whole wood chips, containing a minimum of 25% of the fibers averaging 10
mm long, with a minimum of 50% or more retained on a #24 mesh screen. The
organic binders shall be a high viscosity. Fiber shall not be produced from
recycled material such as sawdust, paper or cardboard.
The bonded fiber matric shall be of such character that it will disperse uniformly
Dennis Yarmouth Intermediate Middle School January 19, 2021
Dennis Yarmouth Regional School District 100% Construction Documents
Perkins Eastman DPC, project #71011
32 92 20 SEEDING FOR LAWN AREAS
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into a slurry when mixed with water. The slurry, when hydraulically applied to the
ground, shall form an absorptive mat of mulch. No materials which inhibit growth
or germination shall be present in the mixture.
2.2 SEED
A. General: Pure, live, fresh seed from commercial sources meeting and labeled in
accordance with State and Federal laws, rules and regulations. All seed to have
minimum germination rate of 90%.
1. All seed shall meet one or both of the following:
a. Turfgrass Water Conservation Alliance or
b. Alliance for Low Input Sustainable Turf 'A List'
2. Seed mix for all general lawn areas with the limit of disturbance not
otherwise noted to receive seed shall conform to the following grass types
and percentages:
Improved Perennial Rye 50%
Creeping Red Fescue 25%
Turf Type Tall Fescue 18.5%
Kentucky Bluegrass 5%
Red Top 1%
Colonial Bentgrass 0.5%
Sowing Rate: 5 to 7 pounds per 1,000 sq. ft.
Overseed Sowing Rate: 2 to 3 pounds for 1,000 sq. ft.
2.3 WEED CONTROL
A. Pre-emergent weed control for Loam and Seed Areas shall be Treflan 5-G or
approved equal. Deliver in manufacturer’s fully identified containers and apply
according to manufacturer’s directions.
B. Contractor shall notify Owners Project Manager 4 days prior to anticipated
application, time, and type of pre-emergent weed control.
2.4 WATER
A. Clean, fresh potable water free of salt and other impurities injurious to vegetation.
Site irrigation may be used.
2.5 JUTE MESH
A. Jute mesh shall be uniform, open, plain weave of undyed and unbleached single
jute yarn, a minimum of four (4) feet in width plus or minus one (1) inch. There shall
be 78 warp ends per width and 41 weft ends per yard. Weight shall average 1.22
pounds per linear yard, plus or minus 5%. Staples for Erosion Control Materials: 9
gauge staples shall be used with jute mesh: 11 gauge with woven paper.
Dennis Yarmouth Intermediate Middle School January 19, 2021
Dennis Yarmouth Regional School District 100% Construction Documents
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32 92 20 SEEDING FOR LAWN AREAS
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PART 3 - EXECUTION
3.1 GENERAL
A. Seeded areas shall, at a minimum, include all areas of site within project limit lines
that have been disturbed or are barren unless otherwise noted on the plans.
B. Any seeded areas that are rutted or eroded due to construction, weather or
otherwise damaged shall be the responsibility of the contractor to correct.
C. Multi-phased projects may have different seeding times based on each phase. It is
the contractor’s responsibility to follow the specifications herein for each phase of
construction.
3.2 APPLICATION OF SEED
A. Seeding operations shall not occur until the seed bed has been approved per
Specification 32 92 00, Section 3.1.
B. The approved seed mixture shall be applied at a rate indicated in Section 2.2 of this
specification by means of a seeder device capable of penetrating ground to depth of
1". Seeder machine shall be equipped with disc-type penetrating action and seeder
tubes which plant seeds. Seeder shall be similar to Jacobson Model 524-100,
548100 or equal.
C. Distribute seed over area in two separate passes, each one perpendicular to the
other (north-south, east-west orientation). Each pass shall be in a linear
progression, and shall conform to the field direction that permits the longest straight
line application procedure.
D. Hydro mulch shall be applied to seeded areas after seeding has occurred on
athletic fields.
E. Hydroseeding will be permitted only with permission of Owner’s Representative. All
requests shall be in writing with detailed and itemized procedure to be followed.
F. Broadcast seeding will be permitted only with permission of Owner’s
Representative. All requests shall be in writing with detailed and itemized
procedure to be followed.
3.3 APPLICATION OF FERTILIZER
A. Complete fertilizer in granular form shall be applied per Specification 32 92 00 – Soil
Preparation for Lawn Establishment.
3.4 APPLYING JUTE MESH
A. Jute mesh shall be applied to any slopes 4:1 or steeper.
B. Apply jute mesh loosely but smoothly to fit the contour of the finished grade,
parallel to and in same direction as the flow of water. The up-slope end of each
separate strip or piece of jute mesh shall be buried in a six (6) inch minimum
vertical anchor slot or junction slot with the soil tamped firmly against the mesh.
Dennis Yarmouth Intermediate Middle School January 19, 2021
Dennis Yarmouth Regional School District 100% Construction Documents
Perkins Eastman DPC, project #71011
32 92 20 SEEDING FOR LAWN AREAS
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Where more than one width of material is required, edges shall overlap a minimum
of twelve (12) inches, and the up-slope section of mesh will be on top. Down-hill
ends of the jute mesh shall be folded under approximately four (4) inches and
stapled in place. Staples will be inserted through the mesh along edges, overlaps,
and in the center of all jute mesh strips at intervals not greater than three (3) feet.
All anchor slots, junction slots, check slots, and terminal folds shall have five (5)
staples spaced not more than nine (9) inches on center across widths.
C. On seeded banks, jute shall be applied immediately after seeding.
3.5 ACCEPTANCE OF SEEDING FOR GENERAL LAWN AREAS
A. PROVISIONAL APPROVAL FOR GENERAL LAWN AREAS
Provisional approval shall be considered after a minimum of ONE full growing
season as indicated in Section 1.5 Paragraph C. In order for provisional
approval to be granted, the Contractor shall request in writing to the Owner’s
Representative that he/she is ready to have the seeded areas reviewed. The
following requirements shall be met.
1. Provisional approval will not occur until after one full growing season. The
seeded areas must be well established, exhibiting a vigorous growing
condition and devoid of bare spots greater than 1 square foot.
2. It will be the contractor’s responsibility to maintain seeded areas from the
time of seed installation until the date of Final Acceptance. See Section 3.4,
C. herein for maintenance requirements.
3. Provisional approval will not be granted until contractor has obtained, in
writing, a statement from the landscape architect indicating that grass is
satisfactory under the terms of the provisional approval.
4. Following are some examples of delays in provisional approval of seeded
areas:
a. Improper grading:
-Low or high spots on flat or fairly level areas
-Improper drainage
-Washed out or rilled areas
-Exposed debris
b. Turf Grass Conditions
-Poor or thin stands of lawn
-Improper fertilization application
-Persistent weeds established in turf areas
-Significant stands of clover are not considered persistent weeds in
general lawn areas
B. FINAL ACCEPTANCE FOR GENERAL LAWN AREAS
In order for final acceptance to be granted, the Contractor shall request in writing
to the Owner’s Representative that he/she is ready to have the seeded areas
reviewed and the following requirements shall be met.
1. All seeded areas have been maintained by the Contractor for not less than
ONE growing season from the time provisional approval is granted.
Growing season shall be defined as follows:
a) If provisional approval is received during April, May, June or July,
next growing season shall end on October 15.
b) If provisional approval is received during September, October,
Dennis Yarmouth Intermediate Middle School January 19, 2021
Dennis Yarmouth Regional School District 100% Construction Documents
Perkins Eastman DPC, project #71011
32 92 20 SEEDING FOR LAWN AREAS
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November or December, next growing season shall end on June 1.
2. Inspection will be made by the Owner’s Representative and the Landscape
Architect. Grass areas not demonstrating satisfactory stands as outlined
above, (except if damaged by vandalism) as determined, by the L.A. shall
be renovated, re-seeded, and maintained meeting all requirements as
specified herein. Maintenance period shall extend to the end of the next
growing season, see Section 3.5, B,1 herein.
3. After all necessary corrective work has been completed, the Landscape
Architect will submit in writing recommending to the Owner's
Representative that Final Acceptance shall be granted.
4. One application of turf maintenance fertilizer shall be applied before final
acceptance of seeded areas can be granted.
5. Decision of Owner’s Representative as to the necessity to replace grass
areas or repair any defects in workmanship, or cause of any destruction or
loss, impairment or failure to flourish, shall be conclusive and binding upon
Contractor. Replacements shall be the same as specified. All
replacements shall be planted as specified herein at Contractor's expense.
6. "Vandalism", as noted above, is intended to mean any acts, whether
intentional or accidental, by other persons, which clearly result in damage,
and which may reasonably be considered to be beyond the Contractor's
reasonable control, as determined by the Owner's representative.
C. MAINTENANCE FOR GENERAL LAWN AREAS
1. Contractor is responsible for maintaining lawn areas for the growing
seasons as outlined in 3.5, A and B herein.
2. Maintain grassed areas by watering, mowing, fertilizing, weeding, debris
removal and trimming.
3. The Contractor shall mow all established seeded areas. No mowing shall
remove more than one-third of the grass blade length. Heavy mowing,
resulting in grass on the surface shall be “doubled mowed” or the contractor
shall remove grass on surface. The grass shall be mown to a height of two
and one half to three inches (2-1/2”-3”).
4. The Contractor shall keep all seeded areas watered and in good condition,
reseeding if and when necessary to meet the requirements specified
herein.
5. Watering of seeded areas.
a. During this period, water grass as necessary to maintain an
adequate supply of moisture within the root zone. An adequate
supply of moisture is the equivalent of two (2) inches of absorbed
water per week that is delivered at weekly intervals in the form of
natural rain or is augmented by watering by the contractor.
6. Repair areas damaged by erosion or construction activities by regrading,
rolling and replanting.
7. Reseed small, sparse grass areas. When sparse areas exceed 20 percent
of planted area, reseed and hydro mulch.
END OF SECTION