HomeMy WebLinkAbout32-92-10-Soil-Preparation-For-Athletic-Fields_Rev_1Dennis Yarmouth Intermediate Middle School January 19, 2021
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32 92 10 SOIL PREPARATION FOR ATHLETIC FIELDS
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Section 32 92 10
SOIL PREPARATION FOR ATHLETIC FIELDS
PART 1 - GENERAL
1.1 SUMMARY
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 31 00 00 – Earth Moving
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. Loam from off-site, if on-site is insufficient.
2. Grading and Spreading Loam.
3. Preparations of Areas for Seeding.
4. Application of Limestone.
5. Application of Lawn Starter Fertilizer.
6. Application of Turf Maintenance Fertilizer.
7. Applying Jute Mesh.
1.3 MINIMUM REQUIREMENTS
A. The successful contractor shall meet the following minimum requirements in order to be
considered for installation of the athletic fields. All requirements listed in 1.3 MINIMUM
REQUIREMENTS shall be documented and submitted to the Landscape Architect for approval
prior to commencement of any athletic field work.
1. Selected installer/ base contractor shall employ a person certified by ASBA in the
construction of natural grass athletic fields CFB-N. The contractor shall employ and
maintain for the term of the contract an ASBA certified natural turf field builder on staff
to ensure quality control in all aspects of a project conducted under this solicitation.
Failure of the bidder to meet this requirement in its response will be deemed non-
responsive.
2. Selected installer must have installed a minimum of ten (10) fields greater than five (5)
years old of similar materials and design. Documentation of this shall be furnished per
1.3, A above.
3. Selected installer must install athletic fields using his/her own crews, subcontracting of
installation work will not be allowed.
4. Selected installer must have a minimum of ten (10) outdoor fields at over 70,000 square
feet each installed in the Northeast United States of similar construction. A list of these
installations with owner’s name and phone number shall be furnished per 1.3, A above.
5. Selected installer must have a minimum of five (5) years’ experience in the installation
of athletic fields. The crew foreman shall have installed a minimum of five (5) similar
installations. A list of previous projects installed by foreman shall be furnished per 1.3, A
above.
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1.4 QUALITY ASSURANCE
A. The approved contractor shall review all plans and specification including the following prior to
the start of construction:
1. Review the entire system including subgrade, base, utilities, and drainage to ensure all
components are complimentary.
B. Installation of the athletic field shall be done only after excavation and construction work which
might injure work that has been complete. Damage caused during construction shall be repaired
prior to acceptance.
C. Do not make substitutions without written approval. If specified materials are not available,
obtain approval for substitution from the Owner's Representative.
1.5 SUBMITTALS
A. At least 30 days to ordering material, the Contractor shall submit to the engineer samples,
manufacturer’s product data, source of off-site loam to be provided, and certified test results for
materials as specified below. Certification shall list soil additives to loam including rates and
type.
B. Existing On-Site loam: Sample and test existing on-site loam. The Contractor shall sample the
existing loam soils from the construction site with the following requirements:
1. The contractor shall provide a one cubic foot representative sample per each 1,000
cubic yard on-site stockpile of existing loam for testing. All stockpile sampling shall be
per ASTM D 75 and Appendixes.
2. Preparation of Samples: Contractor shall place these soil slices into a large, clean
plastic container and mix thoroughly. Contractor shall take one cup of soil mixture and
dry it room temperature (do not dry samples in an oven or on a stove or radiator).
Once soil is dry, place soil in sandwich size type plastic bag and close. Label each
sample on outside of bag, identifying sample by soil type and acre.
C. Loam from off-site, if on-site is insufficient: The Contractor shall provide a one cubic foot
representative sample per each 1,000 cubic yard proposed stockpile of loam borrow for testing.
All stockpile sampling shall be per ASTM D 75 and Appendixes.
D. All testing shall be at the expense of the contractor. Contractor shall deliver samples to the
testing facility and have the results forwarded to the Architect. Perform all tests for gradation,
organic content, soil chemistry and Ph. Testing reports shall include the following tests and
recommendations:
1. Mechanical gradation (sieve analysis) shall be performed and compared to the USDA
Soil Classification System.
2. Chemical Analysis shall be undertaken for Nitrate Nitrogen, Ammonium Nitrogen,
Phosphorus, Potassium, Calcium, Magnesium, Lead, Zinc, Soluble Salts, extractable
Aluminum, Cadmium, Copper, pH and buffer pH. Except where otherwise noted,
nutrient tests shall be for available nutrients.
3. Soil analysis tests shall show recommendations for soil additives to correct soils to
meet the specifications and for additives necessary to accomplish lawn work as
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specified.
4. Permeability rates for materials.
E. Compost: Submit supplier’s certification of contents.
F. Certification and/or labels of proposed soil additives stating names of each.
1.6 DEFINITIONS
A. The following definitions shall apply to the work of this section.
The following size distributions of mineral particles by diameter and sieve size shall apply to the
following conventional names of soil types:
Conventional Name Retained on US Sieve No. Diameter (mm)
Very Coarse Sand #18 1-2
Coarse Sand #35 0.5-1
Medium Sand #60 0.25-0.5
Fine Sand #140 0.10-0.25
Very Fine Sand #270 0.05-0.10
Silt by hydrometer 0.002-0.05
Clay by hydrometer Less than 0.002
1.7 PRODUCT DELIVER, STORAGE AND HANDLING
A. Protect all products from weather vandalism or other damaging or deteriorating conditions.
PART 2 - PRODUCTS
2.1 CLEAN SCREENED LOAM
A. Loam shall consist of screened fertile, loose, friable fine sandy loam or sandy loam free of subsoil,
refuse, stamps, roots, rocks, cobbles, stones, brush, noxious weeds, litter and other materials which
are larger than 1/2 inch (1/2”) in any dimension and which will prevent healthy plant growth.
B. Loam shall be one of the following sandy loams: “coarse sandy loam”, “sandy loam”, “fine sandy
loam” based on the USDA Classification System determined by mechanical analysis ASTM D-
422. It shall be uniform in composition, without admixture of subsoil. The loam shall possess
good filtration and permeability rates, and shall possess a mechanical analysis where:
Sand (0.05 to 2.0 mm) 65% - 75% with no less than 70% of the sand in
the medium through very coarse sand fractions
(0.25 – 2 mm)
Silt (0.002 to 0.05 mm) 15%-25%
Clay (< 0.002) 10%-20%
Gravel (> 2.0 mm) <15%
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Maximum size shall be three eighths (3/8”) inches largest diameter.
C. Organic Content and Ph: Loam shall contain not less than 3% or more than 6% organic matter
D. Acidity range shall be pH 6 to 7.5 in seeded areas when tested according to methods of testing
or A.O.A.C.
1. Loam Borrow shall be pH adjusted for particular planting applications and shall be
adjusted prior to delivery to the project site.
a. When pH of loam is equal to or greater than 7.5 use aluminum sulfate to adjust
pH to required levels.
b. When pH of loam is less than 6 use either sulfur or ferrous sulfate to adjust pH
to required levels.
E. The loam borrow must not be handled or moved when in wet or frozen conditions.
F. Loam shall be uncontaminated by salt water, foreign matter and substances harmful to plant
growth. Topsoil shall not have extractable aluminum greater than 200 parts per million unless
otherwise noted. Cation Exchange Capacity (CEC) shall be between 10 and 15.
G. Loam should yield a saturated hydraulic conductivity value of 1 to 2 inches per hour.
H. Contractor is made aware that on-site materials will not likely meet requirements of clean
screened loam for use within athletic fields. Contractor shall include imported screened loam for
all athletic fields within the Base Bid.
I. Existing loam from on site shall be screen to remove all stones and debris larger then ½”. Any
additional amending of loam on site shall be done on site with a portable pug mill type plant.
Final screened loam shall be tested by third party to meet the minimum requirements of this
specification.
2.2 SOIL ADDITIVES
A. Dolomitic Limestone: contain up to 50% magnesium carbonate in a dry, granular form.
Limestone shall be ground to such a fineness that at least 50% will pass through a 100-mesh
sieve and 90% to 100% will pass through a 20-mesh sieve.
B. Aluminum Sulfate: shall be unadulterated, 57%.
C. Lawn Starter and Maintenance Fertilizer:
1. Fertilizer shall be Organic-based and be OMRI (Organic Materials Review Institute)
Certified
2. Complete fertilizer in granular form, from commercial sources bearing manufacturer’s
analysis; 2-3-3 ratio of N-P-K.
a. Total Nitrogen (N) – 2.0%
b. 0.8% - Water Soluble Nitrogen
c. 1.2% - Water Insoluble Nitrogen
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d. Available Phosphate (P2O5) – 3.0%
e. Soluble Phosphate (K2O) – 3.0%
Application Rate: Apply 2-3 pounds per 100 square feet
D. Sand: Shall be clean, course, ungraded material meeting ASTM C33 requirements for
masonry sand, with the following addendums:
1. The sand shall have a fineness modulus of 2.5 to 3.2.
2. A coefficient of uniformity (D60/D10) of less than 4.
E. Compost: Compost may be used, compost shall be derived from the following:
1. Yard Debris: Compost made from yard trimmings, such as leaves, grass clippings and
pruning that have been properly composted, are mature and have been sieved through a ¾
inch screen shall be free of trash and contain no toxic substances harmful to plant growth
Compost and/or biosolids compost/compost sludge.
2. Biosolids Compost/Compost Sludge: Compost made from biosolids that are mature and have
been sieved through a 1/2 inch screen. The pH range shall be 6.2-7.2
3. All compost provided shall have the following properties:
1. Organic matter content of no less than 30% as determined by ASTM D2974.
2. A moisture content of 35%-70%, as determined by ASTM D2974.
3. A carbon/nitrogen ratio of 15:1 to 30:1.
4. Soluble salts not to exceed 3 dS/m.
5. A Solvita Index of 6 to 8.
6. A pH of 6 to 8.
7. Non-phytotoxic.
F. Humus: Shall be natural humus, free from excessive amounts of zinc, low in wood content, free from
hard lumps and in a shredded or granular form. The acidity range shall be approximately 5.5 pH to
7.5 pH and the organic matter shall not be less than 85% as determined by loss on ignition. The
minimum water absorbing ability shall be 200% by weight on an oven-dry basis.
G. Bone Meal: shall be fine ground, steam cooked, packing house bone with a minimum analysis of 23%
phosphoric acid and 4% nitrogen.
H. Jute Mesh: 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.
2.3 WATER
B. Clean, fresh potable water.
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PART 3 - EXECUTION
3.0 GRADING AND SPREADING LOAM
A. Remove all debris and other inorganic materials on any prepared subgrades, and reshape and
dress any damaged or eroded slopes, swales, and other areas. Scarify and loosen subgrade to a
friable condition in any areas where compaction may have occurred. Loam shall not be placed
until subgrade is in suitable condition and free of excessive moisture or frozen materials.
B. Prior to the spreading of any loam the testing and inspection shall be performed to meet the
required compaction of 90%. Landscape Architect shall inspect the subgrade and each
subsequent layer prior to moving to the layer in the process.
C. Loam shall be spread as specified on all disturbed and bare areas to produce a total depth of 6"
as shown on the plan. Fill all depressions in existing grades with suitable fill material as specified
in Section 31 00 00 prior to spreading loam, then shape and finish grade to depth of loam
required.
D. Area shall be progressively fine graded and machine and hand raked, with loam added to correct
depressions and other irregularities, to produce smooth and unbroken finish grades and the depth
of loam required.
E. Drawings show grading design intent to achieve a uniform grade not less than 1.25% slope.
Finish grades shall conform to lines, grades, sections, and shapes of lawn areas as shown on the
plans. Provide positive drainage. Provide smooth, uniform, rounded transitions at all changes
and break in grade. Loam is to be consistent depth of 1/2" below adjacent pavements surfaces.
F. FINISH GRADING – of Athletic fields
1. Verify topsoil has been contoured and compacted to within 1/8” in 10 ft.
2. Remove debris, roots, branches or stones in excess of ½” in size. Fine grade to eliminate
uneven areas and low spots. Maintain profiles and contours of field sloped at maximum
1.25%.
3. Fine grading on the topsoil MUST be done with laser guided equipment to ensure precise
grading of the fields. Equipment shall be equipped with turf-type flotation tires to
minimize rutting and compaction.
G. TOLERANCES
1. Subgrade: Plus or minus 0.02 foot (7mm) from design grade.
2. Finish grade of Field and Field Events: Plus or minus 1/8” in 10 ft from required
elevations. NO /exceptions will be granted.
H. FIELD QUALITY CONTROL
1. Field inspection and testing will be performed by independent testing agency under
provisions of Section 01 4000.
2. Tests and analysis of fill material will be performed by independent testing agency in
accordance with ASTM D698 and with Section 01 4000.
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3. Compaction testing will be performed by independent testing agency in accordance with
ASTM D698 and with Section 01 4000.
4. The Contractor shall provide a topographical of each layer (Subgrade, Sub Base, and
Finish Graded Loam) survey shall be by means of a laser and plotted on a 10-foot grid
produced a third party Massachusetts licensed surveyor. Based upon the inspection of
the topographical surveys, the Contractor shall fine grade each layer suitably, including
properly rolling and compacting the base to achieve a surface planarity to within 1/8” in
10-feet (+0, -1/8”). PERMISSION SHALL NOT BE PROVIDED TO MOVE FORWARD
FOR TOLERANCE TO GRADE WITHOUT REVIEW OF THE CONTRACTOR
PROVIDED LASER SURVEY AND APPROVAL BY THE LANDSCAPE FOR EACH
LAYER OF BASE WORK INCLUDING SUBGRADE, SUBBASE AND FINISH TOPSOIL.
If the topographical survey does not meet tolerances as indicated in this specification,
contractor shall repair areas to meet tolerance and resurvey the area repaired at no cost
to the Owner.
5. If tests OR survey indicate work does not meet specified requirements, remove work,
replace, and retest at no cost to Owner.
3.1 PREPARATION OF AREAS FOR SEEDING
A. GENERAL DESCRIPTION: This work shall consist of the preparation of the seed bed. Work
shall be done as described herein:
1. Areas shall be finely raked to a finished grade. Substantially, all sticks, litter, wire, weeds,
cable or stones larger than one half (1/2") inch in greater dimension shall be removed and
disposed of per the contract specifications.
2. Where the soil has become compacted, prior to fine raking, areas to be seeded shall be
scarified by discing, york raking, or other approved method to a minimum depth of two (2)
inches.
3. No seeding will be permitted on areas where the seed bed has not been properly
prepared or where the soil is compacted.
4. Request inspection of the work for approval before proceeding with seeding.
3.2 APPLICATION OF LIMESTONE
A. When applied dry, limestone shall be spread evenly and incorporated thoroughly into the soil by
discing or other approved means.
B. When applied hydraulically, no discing will be necessary.
C. Granular treatment to be applied at the rate of 25 to 50 lbs. per 1,000 square feet or as required
by soil pH test to produce a pH of 6.0 to 6.5.
3.3 APPLICATION OF STARTER AND MAINTENANCE FERTILIZER
A. One application of turf maintenance fertilizer will be required before final acceptance of seeded
areas.
B. Fertilizer shall be Organic-based and be OMRI (Organic Materials Review Institute) Certified
C. Application Rate: Apply 2-3 pounds per 100 square feet.
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D. Fertilizer shall be applied at a time, which shall be requested in writing by the Contractor, and
approved in writing by the Owner’s representative.
END OF SECTION 32 92 10