HomeMy WebLinkAboutFile Documents.754 Moore Dr.0034.2018 (36).ARBK754 Moore Drive, Aspen, CO 81611 December 2018
SOIL PREPARATION 329113 - 1
SECTION 329113 - SOIL PREPARATION
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 planting soils specified by composition of the mixes.
B. Related Requirements:
1. Section 329200 "Turf and Grasses" for placing planting soil for turf and grasses.
2. Section 329300 "Plants" for placing planting soil for plantings.
1.3 DEFINITIONS
A. AAPFCO: Association of American Plant Food Control Officials.
B. Backfill: The earth used to replace or the act of replacing earth in an excavation. This can be
amended or unamended soil as indicated.
C. CEC: Cation exchange capacity.
D. Compost: The product resulting from the controlled biological decomposition of organic
material that has been sanitized through the generation of heat and stabilized to the point that it
is beneficial to plant growth.
E. Duff Layer: A surface layer of soil, typical of forested areas, that is composed of mostly
decayed leaves, twigs, and detritus.
F. Imported Soil: Soil that is transported to Project site for use.
G. Manufactured Soil: Soil produced by blending soils, sand, stabilized organic soil amendments,
and other materials to produce planting soil.
H. NAPT: North American Proficiency Testing Program. An SSSA program to assist soil-, plant-,
and water-testing laboratories through interlaboratory sample exchanges and statistical
evaluation of analytical data.
I. Organic Matter: The total of organic materials in soil exclusive of undecayed plant and animal
tissues, their partial decomposition products, and the soil biomass; also called "humus" or "soil
organic matter."
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J. Planting Soil: Existing, on-site soil; imported soil; or manufactured soil that has been modified
as specified with soil amendments and perhaps fertilizers to produce a soil mixture best for
plant growth.
K. RCRA Metals: Hazardous metals identified by the EPA under the Resource Conservation and
Recovery Act.
L. SSSA: Soil Science Society of America.
M. Subgrade: Surface or elevation of subsoil remaining after excavation is complete, or the top
surface of a fill or backfill before planting soil is placed.
N. Subsoil: Soil beneath the level of subgrade; soil beneath the topsoil layers of a naturally
occurring soil profile, typified by less than 1 percent organic matter and few soil organisms.
O. Surface Soil: Soil that is present at the top layer of the existing soil profile. In undisturbed areas,
surface soil is typically called "topsoil"; but in disturbed areas such as urban environments, the
surface soil can be subsoil.
P. USCC: U.S. Composting Council.
1.4 ACTION SUBMITTALS
A. Product Data: For each type of product.
1. Include recommendations for application and use.
2. Include test data substantiating that products comply with requirements.
3. Include sieve analyses for aggregate materials.
4. Material Certificates: For each type of imported soil and soil amendment and fertilizer
before delivery to the site, according to the following:
a. Manufacturer's qualified testing agency's certified analysis of standard products.
b. Analysis of fertilizers, by a qualified testing agency, made according to AAPFCO
methods for testing and labeling and according to AAPFCO's SUIP #25.
c. Analysis of nonstandard materials, by a qualified testing agency, made according
to SSSA methods, where applicable.
1.5 DELIVERY, STORAGE, AND HANDLING
A. Packaged Materials: Deliver packaged materials in original, unopened containers showing
weight, certified analysis, name and address of manufacturer, and compliance with state and
Federal laws if applicable.
B. 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.
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3. Do not move or handle materials when they are wet or frozen.
4. Accompany each delivery of bulk fertilizers and soil amendments with appropriate
certificates.
PART 2 - PRODUCTS
2.1 MATERIALS
A. Regional Materials: Imported soil manufactured planting soil and soil amendments and
fertilizers shall be manufactured within 500 miles (800 km) of Project site from materials that
have been extracted, harvested, or recovered, as well as manufactured, within 500 miles (800
km) of Project site.
2.2 PLANTING SOILS SPECIFIED BY COMPOSITION
A. General: Soil amendments, fertilizers, and rates of application specified in this article are
guidelines that may need revision based on testing laboratory's recommendations after
preconstruction soil analyses are performed.
B. Planting Soil Type 1 – Shrubs, Perennials and Lawn:
1. Percentage of Organic Matter: 9 to 18 percent by volume.
2. Soil Reaction: pH of 6 to 7
3. CEC of Total Soil: Minimum 10 meq/100 mL
4. Soluble-Salt Content: 5 to 10 dS/m measured by electrical conductivity.
5. Bulk Density: 1.1 g/cu. cm to 1.4 g/cu. cm at 85% compaction.
6. Total Porosity: Minimum 50 percent at 85% compaction.
7. Fertility: Per laboratory recommendation
8. Microbiological Content: per laboratory recommendation
9. RCRA Metals: Below maximum limits established by the EPA per section 31 23 23
10. Soil Texture: Sandy loam
11. Minimum Soil Depth: 8 inches.
C. Planting Soil Type 2 – Trees:
1. Percentage of Organic Matter: 5 percent by volume.
a. Percentage of Organic Matter for Top Soil: 5 percent by weight.
b. Percentage of Organic Matter for Subsoil: 1 to 3 percent by weight.
2. Back fill trees with 50% native topsoil.
3. Soil Reaction: pH of 6 to 7
4. CEC of Total Soil: Minimum 10 meq/100 mL
5. Soluble-Salt Content: 5 to 10 dS/m measured by electrical conductivity.
6. Bulk Density: 1.1 g/cu. cm to 1.4 g/cu. cm at 85% compaction.
7. Total Porosity: Minimum 50 percent at 85% compaction.
8. Fertility: Per laboratory recommendation
9. Microbiological Content: per laboratory recommendation
10. RCRA Metals: Below maximum limits established by the EPA per section 31 23 23
11. Soil Texture: Sandy loam
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12. Minimum Total Top Soil Depth: 36 inches
D. Planting Soil Type 3 – Native Revegetation:
1. Percentage of Organic Matter: 5 percent by volume.
2. Soil Reaction: pH of 6 to 7
3. CEC of Total Soil: Minimum 10 meq/100 mL
4. Soluble-Salt Content: 5 to 10 dS/m measured by electrical conductivity.
5. Bulk Density: 1.1 g/cu. cm to 1.4 g/cu. cm at 85% compaction.
6. Total Porosity: Minimum 50 percent at 85% compaction.
7. Fertility: Per laboratory recommendation
8. Microbiological Content: per laboratory recommendation
9. RCRA Metals: Below maximum limits established by the EPA per section 31 23 23
10. Soil Texture: Sandy loam
11. Minimum Soil Depth: 3 inches.
2.3 INORGANIC SOIL AMENDMENTS
A. Lime: ASTM C 602, agricultural liming material containing a minimum of 80 percent calcium
carbonate equivalent and as follows:
1. Class: T, with a minimum of 99 percent passing through a No. 8 (2.36-mm) sieve and a
minimum of 75 percent passing through a No. 60 (0.25-mm) sieve.
2. Class: O, with a minimum of 95 percent passing through a No. 8 (2.36-mm) sieve and a
minimum of 55 percent passing through a No. 60 (0.25-mm) sieve.
3. Form: Provide lime in form of ground dolomitic limestone or calcitic limestone.
B. Sulfur: Granular, biodegradable, and containing a minimum of 90 percent elemental sulfur, with
a minimum of 99 percent passing through a No. 6 (3.35-mm) sieve and a maximum of 10
percent passing through a No. 40 (0.425-mm) sieve.
C. Iron Sulfate: Granulated ferrous sulfate containing a minimum of 20 percent iron and 10 percent
sulfur.
D. Perlite: Horticultural perlite, soil amendment grade.
E. Agricultural Gypsum: Minimum 90 percent calcium sulfate, finely ground with 90 percent
passing through a No. 50 (0.30-mm) sieve.
F. Sand: Clean, washed, natural or manufactured, free of toxic materials, and according to
ASTM C 33/C 33M.
2.4 ORGANIC SOIL AMENDMENTS
A. Compost: Well-composted, stable, and weed-free organic matter produced by composting
feedstock, and bearing USCC's "Seal of Testing Assurance," and as follows:
1. Feedstock: Limited to leaves.
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2. Reaction: pH of 5.5 to 8.
3. Soluble-Salt Concentration: Less than 4 dS/m.
4. Moisture Content: 35 to 55 percent by weight.
5. Organic-Matter Content: 50 to 60 percent of dry weight.
6. Particle Size: Minimum of 98 percent passing through a 2-inch (50-mm) sieve.
7. Compost Classification: Class I or Class II compost
B. Sphagnum Peat: Partially decomposed sphagnum peat moss, finely divided or of granular
texture with 100 percent passing through a 1/2-inch (13-mm) sieve, a pH of 3.4 to 4.8, and a
soluble-salt content measured by electrical conductivity of maximum 5 dS/m.
C. Muck Peat: Partially decomposed moss peat, native peat, or reed-sedge peat, finely divided or
of granular texture with 100 percent passing through a 1/2-inch (13-mm) sieve, a pH of 6 to 7.5,
a soluble-salt content measured by electrical conductivity of maximum 5 dS/m, having a water-
absorbing capacity of 1100 to 2000 percent, and containing no sand.
D. Wood Derivatives: Shredded and composted, nitrogen-treated sawdust, ground bark, or wood
waste; of uniform texture and free of chips, stones, sticks, soil, or toxic materials.
1. Partially Decomposed Wood Derivatives: In lieu of shredded and composted wood
derivatives, mix shredded and partially decomposed wood derivatives with ammonium
nitrate at a minimum rate of 0.15 lb/cu. ft. (2.4 kg/cu. m) of loose sawdust or ground
bark, or with ammonium sulfate at a minimum rate of [0.25 lb/cu. ft. (4 kg/cu. m) of
loose sawdust or ground bark.
2.5 FERTILIZERS
A. Superphosphate: Commercial, phosphate mixture, soluble; a minimum of 33 percent available
phosphoric acid.
B. 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: 1 lb/1000 sq. ft. (0.5 kg/100 sq. m) of actual nitrogen, 4 percent
phosphorous, and 2 percent potassium, by weight.
2. Composition: Nitrogen, phosphorous, and potassium in amounts recommended in soil
reports from a qualified testing agency.
C. Slow-Release Fertilizer: Granular or pelleted fertilizer consisting of 50 percent water-insoluble
nitrogen, phosphorus, and potassium in the following composition:
1. Composition: 20 percent nitrogen, 10 percent phosphorous, and 10 percent potassium, by
weight.
2. Composition: Nitrogen, phosphorous, and potassium in amounts recommended in soil
reports from a qualified testing agency.
D. Chelated Iron: Commercial-grade FeEDDHA for dicots and woody plants, and commercial-
grade FeDTPA for ornamental grasses and monocots.
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PART 3 - EXECUTION
3.1 GENERAL
A. Place planting soil and fertilizers according to requirements in other Specification Sections.
B. 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 planting soil.
C. Proceed with placement only after unsatisfactory conditions have been corrected.
3.2 PREPARATION OF UNAMENDED, ON-SITE SOIL BEFORE AMENDING
A. Excavation: Excavate soil from designated area(s) to a depth of 6 inches (150 mm) and
stockpile until amended.
B. Unacceptable Materials: Clean soil of concrete slurry, concrete layers or chunks, cement,
plaster, building debris, oils, gasoline, diesel fuel, paint thinner, turpentine, tar, roofing
compound, acid, and other extraneous materials that are harmful to plant growth. The soil shall
have no herbicides, heavy metals, biological toxins or hydrocarbons that impact plant growth or
exceed the EPA’s standards for soil contaminant.
C. Unsuitable Materials: Clean soil to contain a maximum of 5 percent (5%) by volume of stones,
roots, plants, sod, clay lumps, and pockets of coarse sand.
1. Site shall be free of rocks and debris over one-inch (1”) diameter in size. Rocks and
debris 0.5 inch (0.5”) to one inch (1”) shall not exceed 5 percent (5%) by volume and
gravel 0.6 inch (0.6”) to 1.25 inches (1.25”) shall not exceed 5 percent (5%) by volume.
Particles such as concrete, brick, glass, metal, wood or plastic greater than 1 inch (1”)
shall not be allowed. The total volume of these materials smaller than one inch (1”) shall
not exceed 5 percent (5%).
2. Site shall be free of dirt clods over three-quarter inch (3/4”) diameter in size. Dryland
seed areas may contain dirt clots up to two-inch (2”) diameter in size.
D. Screening: Pass unamended soil through a 1-inch (25-mm) sieve to remove large materials.
3.3 PLACING AND MIXING PLANTING SOIL OVER EXPOSED SUBGRADE
A. General: Apply and mix unamended soil with amendments on-site to produce required planting
soil. Do not apply materials or till if existing soil or subgrade is frozen, muddy, or excessively
wet.
B. Subgrade Preparation: Till subgrade to a minimum depth of 6 inches (100 mm).
C. Remove stones larger than 2 inches (50 mm) in any dimension and sticks, roots, rubbish, and
other extraneous matter and legally dispose of them off Owner's property.
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1. Apply, add soil amendments, and mix approximately half the thickness of unamended
soil over prepared, loosened subgrade according to "Mixing" Paragraph below. Mix
thoroughly into top 4 inches (100 mm) of subgrade. Spread remainder of planting soil.
D. Mixing: Spread unamended soil to total depth of 4 inches (100 mm), but not less than required
to meet finish grades after mixing with amendments and natural settlement. Do not spread if soil
or subgrade is frozen, muddy, or excessively wet.
1. Amendments: Apply soil amendments and fertilizer, if required, evenly on surface, and
thoroughly blend them to a minimum depth of six inches (6”) with unamended soil to
produce planting soil. Organic mulch shall be applied at one (1) cubic yard per eighty
(80) square feet at a depth of four (4) inches, and as appropriate to each species.
a. A minimum of four (4) cubic yards of organic matter soil amendment per one-
thousand square feet of landscaped area shall be required as necessary to meet the
5 percent (5%) organic matter specification.
b. Mix lime and sulfur with dry soil before mixing fertilizer.
c. Mix fertilizer with planting soil no more than seven days before planting.
E. Finish Grading: Grade planting soil to a smooth, uniform surface plane with loose, uniformly
fine texture. Roll and rake, remove ridges, and fill depressions to meet finish grades.
1. Site shall be graded to within two-tenths of a foot (2/10) of the grading plan.
3.4 PLACING MANUFACTURED PLANTING SOIL OVER EXPOSED SUBGRADE
A. General: Apply manufactured soil on-site in its final, blended condition. Do not apply materials
or till if existing soil or subgrade is frozen, muddy, or excessively wet.
B. Subgrade Preparation: Till subgrade to a minimum depth of 4 inches (100 mm) in any
dimension and sticks, roots, rubbish, and other extraneous matter and legally dispose of them
off Owner's property.
1. Apply approximately half the thickness of planting soil over prepared, loosened
subgrade. Mix thoroughly into top 4 inches (100 mm) of subgrade. Spread remainder of
planting soil.
C. Application: Spread planting soil to total depth of 4 inches (100 mm), but not less than required
to meet finish grades after natural settlement. Do not spread if soil or subgrade is frozen,
muddy, or excessively wet.
D. Finish Grading: Grade planting soil to a smooth, uniform surface plane with loose, uniformly
fine texture. Roll and rake, remove ridges, and fill depressions to meet finish grades.
3.5 BLENDING PLANTING SOIL IN PLACE
A. General: Mix amendments with in-place, unamended soil to produce required planting soil. Do
not apply materials or till if existing soil or subgrade is frozen, muddy, or excessively wet.
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B. Preparation: Till unamended, existing soil in planting areas to a minimum depth of of 6 inches
(150 mm) in any dimension and sticks, roots, rubbish, and other extraneous matter and legally
dispose of them off Owner's property.
C. Mixing: Apply soil amendments and fertilizer, if required, evenly on surface, and thoroughly
blend them into full depth of unamended, in-place soil to produce planting soil.
1. Mix lime and sulfur with dry soil before mixing fertilizer.
2. Mix fertilizer with planting soil no more than seven days before planting.
D. Finish Grading: Grade planting soil to a smooth, uniform surface plane with loose, uniformly
fine texture. Roll and rake, remove ridges, and fill depressions to meet finish grades.
3.6 PROTECTION
A. Protection Zone: Identify protection zones according to Section 015639 "Temporary Tree and
Plant Protection."
B. Protect areas of in-place soil from additional compaction, disturbance, and contamination.
Prohibit the following practices within these areas except as required to perform planting
operations:
1. Storage of construction materials, debris, or excavated material.
2. Parking vehicles or equipment.
3. Vehicle traffic.
4. Foot traffic.
5. Erection of sheds or structures.
6. Impoundment of water.
7. Excavation or other digging unless otherwise indicated.
C. If planting soil or subgrade is overcompacted, disturbed, or contaminated by foreign or
deleterious materials or liquids, remove the planting soil and contamination; restore the
subgrade as directed by Architect and replace contaminated planting soil with new planting soil.
3.7 CLEANING
A. Protect areas adjacent to planting-soil preparation and placement areas from contamination.
Keep adjacent paving and construction clean and work area in an orderly condition.
B. Remove surplus soil and waste material including excess subsoil, unsuitable materials, trash,
and debris and legally dispose of them off Owner's property unless otherwise indicated.
1. Dispose of excess subsoil and unsuitable materials on-site where directed by Owner.
END OF SECTION 329113
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