HomeMy WebLinkAbout32-92-40-Seeding-For-Non-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 40 SEEDING FOR NON- LAWN AREAS
1 of 6
Section 32 92 40
SEEDING FOR NON-LAWN AREAS
PART 1 – GENERAL
1.1 SUMMARY
A. Drawings and general provisions of Contract, including General and
Supplementary Conditions and Division-1 Specification sections, apply to work of
this section.
B. Related Sections
1. Section 32 92 00 - Soil Preparation for Lawn Establishment
2. Section 32 92 50 – Soil Preparation for Raingardens
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. Acceptance of seeding
C. In general, seeding for non-lawn areas shall be located in specific areas as shown
on the plans.
D. Chemical application in sensitive areas shall be in accordance with the Town’s
Outdoor Integrated Pest Management (IPM) Policy and Plan if available,
manufacturer’s recommendations and as determined by the qualified individual
noted herein.
1.3 RESTRICTIONS
A. Prior to seeding, contractor shall clearly and plainly mark his limits as indicated on
plans.
B. No work shall be performed prior to field determination and approval from Owner’s
Representative.
1.4 QUALITY ASSURANCE
A. Subcontract seeding work to a firm specializing in such work unless Contractor is
fully experienced and qualified.
1. All work associated with invasive management for raingardens, meadow
grass areas and low maintenance areas shall be performed by a qualified
individual with demonstrated experienced in the identification and control
of invasive vegetation and who also holds a pesticide applicators license in
the State of Massachusetts.
B. Each seed bag or container shall display a label which identifies the contents as a
Dennis Yarmouth Intermediate Middle School January 19, 2021
Dennis Yarmouth Regional School District 100% Construction Documents
Perkins Eastman DPC, project #71011
32 92 40 SEEDING FOR NON- LAWN AREAS
2 of 6
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 or Owner's
Representative.
1.5 SUBMITTALS
A. Certifications and/or labels of proposed seed mixtures stating common and
scientific names of plants, percentages by weight, and percentages of purity and
germination.
B. Product information for all proposed weed control chemicals.
C. Submit demonstrated experience in the form of a resume and three references of
qualified personnel performing invasive monitoring and control.
D. Submit current pesticide applicators license in the State of Massachusetts.
1.6 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
Seeding outside of dates above may require additional growing seasons
necessary until Provisional and Final Acceptance.
D. Correlate with specified maintenance periods to provide maintenance to date of
Final Acceptance. Once the schedule is accepted, revise dates only as approved
in writing after documentation of reasons for delays.
1.7 WARRANTY
A. Warranty seeding until final acceptance of seeded areas.
1.8 MAINTENANCE
A. Maintenance of seeding to be performed by the installer includes:
1. Watering
2. Regrading and replanting eroded areas
3. Seeding or patching sparse or bare areas
4. Debris removal
5. Replacement of damaged or dead material
6. Weed removal
Dennis Yarmouth Intermediate Middle School January 19, 2021
Dennis Yarmouth Regional School District 100% Construction Documents
Perkins Eastman DPC, project #71011
32 92 40 SEEDING FOR NON- LAWN AREAS
3 of 6
7. Trimming
B. Maintain seeded areas immediately after placement until Final Acceptance
as outlined in Part 3 of this specification.
PART 2 – PRODUCTS
2.1 SEED
A. Any manufacturer’s names and/or model numbers identified herein are intended to
assist in establishing a general level of quality, configuration, functionality, and
appearance required. This is NOT a proprietary specification and it should be
noted that “or equivalent” applies to all products denoted herein. It is understood
that all manufacturers will have minor variations in configuration, appearance, and
product specifications and such minor variations shall not eliminate such
manufacturers as an equivalent. It is the intent of this specification to encourage
open and competitive involvement from multiple manufacturers that are able to
supply similar products.
B. General: Pure, live, fresh seed from commercial sources, meeting and labeled in
accordance with State and Federal laws, rules, and regulations. Contractor shall
provide labels of all seed used indicating species and percentages. All seed to
have minimum germination rate of 85% unless otherwise noted.
C. Seed Mix A (SMA) for Raingardens - as indicated on the Plans shall be “New
England Erosion Control/Restoration Mix for Detention Basins and Moist Sites” as
supplied by New England Wetland Plants, Inc. or approved equivalent.
Percentages of species shall be per New England Wetland Plants specifications.
Seeding Rate: 35 lbs/acre
D. Seed Mix B (SMB) for Low Maintenance – as indicated on the Plans shall be “New
England Wildflower Mix” as supplied by New England Wetland Plants, Inc. or
approved equivalent. Percentages of species shall be per New England Wetland
Plants specifications.
Seeding Rate: 23 lbs/acre
E. Seed Mix C (SMC) for No-Mow Grass- as indicated on Plans shall be “Prairie
Nursery No-Mow Seed Mix” as supplied by Prairie Nursery or approved equivalent.
Percentage of species shall be per Prairie Nursery specifications.
Seeding Rate: 2.5 lbs/1000 sf
2.2 COVER CROP SEEDING
A. Cover crop seeding shall be applied to all non-lawn areas as shown on the Plans.
B. Cover Crop Seed Mix shall be Grain Oats if application is Jan. 1-July 1 or Grain Rye
if application is August 1-Dec 31.
C. Cover Crop shall be applied at 30 lbs/acre unless otherwise included in seed mix.
2.3 WATER
A. Clean, fresh potable water free of salt and other impurities injurious to vegetation.
Dennis Yarmouth Intermediate Middle School January 19, 2021
Dennis Yarmouth Regional School District 100% Construction Documents
Perkins Eastman DPC, project #71011
32 92 40 SEEDING FOR NON- LAWN AREAS
4 of 6
PART 3 – EXECUTION
3.1 GENERAL
A. Seed Mixes shall be placed in areas noted on the plans.
3.2 APPLICATION OF SEED
A. Seeding shall not occur until the seed bed has been approved per Specification 32
92 00, Section 3.3.
B. The approved seed mixture shall be applied at a rate specified by each particular
type of seeding, by means of a mechanical spreader or by hand on to prepared
soil. Seed shall be lightly raked or rolled to ensure soil contact.
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.
Hydroseeding shall not be permitted for seeded areas specified herein.
E. Broadcast seeding will be permitted only with permission of Owner or Owner’s
Representative. All requests shall be in writing with detailed and itemized
procedure to be followed.
3.3 CARE OF SEEDED AREAS
A. Watering: Contractor shall water all seeded areas immediately after seeding
operations and on a regular basis over the first 2 to 3 weeks until germination is
complete.
B. Refer to Section 3.4, C for additional maintenance requirements.
3.4 ACCEPTANCE OF SEEDING
A. PROVISIONAL APPROVAL
Provisional approval shall be considered after a minimum of ONE full growing
seasons after seeding schedule as outlined in Section 1.6 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 are well established, exhibiting a vigorous growing condition
and devoid of bare spots greater than 1 square foot.
a) If seeding operations are completed during March, April, May or
June the second growing season shall end June 1 the following
Spring.
b) If seeding operations are completed during August, September or
October the second growing season shall end October 1 the
Dennis Yarmouth Intermediate Middle School January 19, 2021
Dennis Yarmouth Regional School District 100% Construction Documents
Perkins Eastman DPC, project #71011
32 92 40 SEEDING FOR NON- LAWN AREAS
5 of 6
following Fall.
2. It will be the contractor’s responsibility to maintain seeded areas from the
time of seed installation, through Provisional approval 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 seeded
areas are satisfactory under the terms of the provisional approval.
4. Following are some examples of delays in provisional approval of seeded
areas:
a. Improper grading
Improper drainage
Washed out or rilled areas
Exposed debris
Persistent weeds established
Over mowing
Seeding outside of accepted schedule
B. FINAL ACCEPTANCE
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. 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 in June, the next growing season
shall end on October 15.
b) If provisional approval is received during October, the next growing
season shall end on June 1.
2. Inspection will be made by the Owner’s Representative and the Landscape
Architect. Seeded 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 3.4, 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. Decision of Owner’s Representative as to the necessity to replace seeded
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.
5. "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
1. Contractor shall maintain seeded areas up to provisional approval and a
minimum of one full growing season after provisional approval through
Final Acceptance.
Dennis Yarmouth Intermediate Middle School January 19, 2021
Dennis Yarmouth Regional School District 100% Construction Documents
Perkins Eastman DPC, project #71011
32 92 40 SEEDING FOR NON- LAWN AREAS
6 of 6
2. General: The contractor shall maintain seeded areas by watering, weed
and invasive species removal, debris removal, repair damaged areas and
trimming.
3. Trimming:
a. Seed Mixes shall be trimmed using a weed-eater set to a height
of 6” to 8”. Trimming lower than 4” will kill many species in the
mixes. Trimming shall occur once in the fall after fall blooming
has occurred and once in the spring before May 15th.
4. Watering: The Contractor shall keep all seeded areas watered and in good
condition during establishment.
a. During this period, water seeded areas 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: Repair areas damaged by erosion or construction activities by
regrading, topdressing and re-seeding until Final Acceptance. Reseed
small, sparse vegetated areas. When sparse areas exceed 20 percent of
planted area, reseed and water.
7. Invasive Plant Identification: There are a number of invasive species that
may potentially colonize the new landscape areas and must be identified
and removed. Some include Asiatic Bittersweet (Celastrus orbiculatus),
Glossy Buckthorn (Rhamnus frangula), Japanese Barberry (Berberis
thunbergii) and Multiflora Rose (Rosa multiflora), Autumn Olive (Elaeagnus
umbellata), Common Reed (Phragmites australis), Japanese Knotweed
(Polygonum cuspidatum), Purple Loosestrife (Lythrum salicaria), and Reed
Canary Grass (Phalaris arundinacea), Tartarian Honeysuckle (Lonicera
tatarica), Poison Ivy (Toxicodendron radicans). Any and all of these
species pose at least a potential threat to colonize the replication areas.
8. Weed and Invasive Removal: Problem weeds and invasives should be
hand-pulled including root systems in all non-lawn areas beginning at the
completion of seeding operations. Contractor shall inspect all seeded
areas once per month after seeding operations are completed for each
area through Provisional and Final Acceptance to remove weed and
invasive plant growth while seed is establishing.
9. Inspection frequency and maintenance shall occur each month from April
through October through Final Acceptance.
10. Reporting: Contractor shall complete an inspection report indicating
inspections and work completed each month from April through October
during construction until Final Acceptance. Monthly Reporting shall include
update on watering, trimming, repair, weed and invasive removal.
1. Sample Inspection Report included herein.
END OF SECTION 32 92 40