Attach 1.Spec 12.32 92 23.09R0007.pdf

Solicitation No. FA5270-09-R-0007

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SECTION 32 92 23

SODDING

PART 1 - GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to in the text by the basic designation only. The most current editions shall be used.

FEDERAL SPECIFICATIONS (FS):

FS O-F-241D (1999) Fertilizers, Mixed, Commercial

AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM):

ASTM D2607-69 Peats, Mosses, Humus, and Related Products

AMERICAN SOD PRODUCERS ASSOCIATION, INC. (ASPA):

ASPA GSS-94 Guideline Specifications for Sodding

1.2 DELIVERY AND HANDLING

a. Delivery:

1. Sod Protection: Protect from drying out and from contamination during delivery, on-site storage, and handling.

2. Fertilizer Delivery: Deliver to the site in original, unopened containers bearing manufacturer's chemical analysis, name, trade name, trademark, and indication of conformance to Japanese laws. Instead of containers, fertilizer may be furnished in bulk with certificate indicating the above information.

b. Handling: Do not drop or dump materials from vehicles.

1.3 TIME LIMITATION FOR SOD

Limit the time between harvesting and placing sod as specified in paragraph entitled "Placing".

PART 2 - PRODUCTS

2.1 SOD

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Machine cut sod at a uniform thickness of 19mm within a tolerance of 6mm, excluding top growth and thatch. Each individual sod piece shall be strong enough to support its own weight when lifted by the ends. Broken pads, irregularly shaped pieces, and torn or uneven ends will be rejected. Wood pegs and wire staples for anchorage shall be as recommended by sod supplier.

2.2 SOIL CONDITIONERS

Provide singly or in combination as required to meet specified requirements for topsoil.

a. Peat: ASTM D2607 as modified herein. Shred and granulate peat to pass 13mm mesh screen and condition in storage pile for minimum 6 months after excavation.

b. Sand: Clean and free of materials harmful to plants.

c. Rotted Manure: Well rotted, horse or cattle manure containing maximum 25 percent by volume of straw, sawdust, or other bedding materials. Manure shall be free of stones, sticks, and soil.

d. Composted Wood Derivatives: Ground bark, sawdust, or other wood waste material free of stones, sticks, and soil stabilized with nitrogen and having the following properties:

1. Particle Size: Minimum percent by weight passing

No. 4 mesh screen 95 No. 8 mesh screen 80

2. Nitrogen Content: Minimum percent based on dry weight

Redwood Sawdust 0.5 Fir Sawdust 0.7 Fir or Pine Bark 1.0

2.3 FERTILIZER

Commercial grade fertilizer conforming to FS O-F-241, Type I, Class 2, free flowing, uniform in composition.

2.4 MULCHES

Free from noxious weeds, mold, and other deleterious materials.

a. Wood Chips: Ground redwood or fire tree bark, 5mm maximum particle size.

b. Straw: Stalks from oats, wheat, rye, barley, or rice. Furnish in air-dry condition and proper consistency for placing with commercial mulch blowing equipment.

c. Hay: Air-dry condition and of proper consistency for placing with commercial mulch blowing equipment. Provide only marsh hay for lawn areas.

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d. Wood Cellulose Fiber: Processed to contain no growth or germination-inhibiting factors and dyed an appropriate color to facilitate visual metering of materials application. Composition on air-dry weight basis: 9 to 15 percent moisture, pH range from 3.5 to 5.0. Use with hydraulic application of grass seed and fertilizer.

2.5 WATER

Suitable quality for irrigation.

PART 3 - EXECUTION

3.1 PREPARATION

a. Subgrade: After areas required to be turfed have been brought to the required subgrade, thoroughly till to minimum depth of 150mm by scarifying, disking, harrowing, or other approved methods. Remove debris and stones larger than 25mm in any dimension remaining on surface after tillage.

b. Topsoiling: Immediately prior to placing existing topsoil, scarify subgrade to a 50mm depth for bonding of topsoil with subsoil. Spread topsoil evenly to a minimum depth of 100mm. Do not spread topsoil when excessively wet or dry. Correct irregularities in finished surfaces to eliminate depressions. Protect finished topsoil areas from damage by vehicular or pedestrian traffic.

c. Fertilizer and Soil Conditioners:

1. Application Rates and Analysis: Apply fertilizer and soil conditioner at rates recommended by the manufacturer.

2. Depth: Incorporate fertilizer and soil conditioners into soil to minimum depth of

150mm. This may be done as part of the subgrade tillage operation specified herein.

3.2 SODDING

a. Placing: Place sod a maximum of 36 hours after initial harvesting, in accordance with ASPA GSS as modified herein. Thoroughly moisten areas to be sodded immediately prior to placing sod.

b. Spot Sodding: Cut sod into plugs 50mm square or 50mm in diameter. Place individual pieces of sod and press firmly into soil by foot pressure or by tamping.

c. Sodding Slopes: For slopes 2:1 and greater, lay sod with long edge parallel to slope.

Anchor each piece of sod with wood pegs or wire staples maximum 60cm on center. On slope areas, start sodding at bottom of the slope.

d. Finishing: After completing sodding, blend edges of sodded area smoothly into surrounding turfed area.

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e. Watering: Start watering immediately after completing each day's sodding. Apply water at a rate sufficient to ensure thorough wetting of soil to minimum depth of 100mm.

3.3 PROTECTION OF TURF AREAS

Immediately after turfing, protect area against traffic and other use.

3.4 RESTORATION

Restore to original condition existing turf areas which have been damaged during turfing operations.

Keep clean at all times at least one paved pedestrian access route and one paved vehicular access route to each building. Clean other paving when work in adjacent areas is complete.

3.5 TURF ESTABLISHMENT PERIOD

a. Period Parameters: Turf establishment period will be in effect until turf has been mowed three times.

b. Maintenance During Turf Establishment Period:

1. Mowing: Mow turfed area to an average height of 38 mm when average height of grass becomes 50 mm.

2. Promotion of Turf Growth: Mow, remove excess clippings, eradicate weeds, water, fertilize, and perform other operations necessary to promote turf growth.

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