FA8501-09-R-0041 - 02936 - Seeding.docx

02936 SEEDING

1 PART 1 GENERAL

1.1 SECTION INCLUDED

A. Preparation of subsoil

B. Placing topsoil

C. Seeding, mulching and fertilizer

1.2 RELATED SECTIONS

A. Section 02223 - Backfilling.

1.3 MEASUREMENT AND PAYMENT

A. Topsoil:

1. Basis of Measurement: Included in lump sum price for the work.

2. Basis of Payment: Includes topsoil, placing topsoil and disposal of excess topsoil.

B. Grassed Areas:

1. Basis of Measurement: Included in lump sum price for the work.

2. Basis of Payment: Includes preparation of topsoil, placing topsoil, seeding, mulching, watering and maintenance to specified time limit.

1.4 REFERENCES

A. FS O-F-241 - Fertilizers, Mixed, Commercial

1.5 DEFINITIONS

A. Weeds: Includes Dandelion, Jimsonweed, Quackgrass, Horsetail, Morning Glory, Rush Grass, Mustard, Lambsquarter, Chickweed, Cress, Crabgrass, Canadian Thistle, Nutgrass, Poison Oak, Blackberry, Tansy Ragwort, Bermuda Grass, Johnson Grass, Poison Ivy, Nut Sedge, Nimble Will, Bindweed, Bent Grass, Wild Garlic, Perennial Sorrel, and Brome Grass.

1.6 MAINTENANCE DATA

A. No submittal required for maintenance data.

1.7 QUALITY ASSURANCE

A. Provide seed mixture in containers showing percentage of seed mix, year of production, net weight, date of packaging, and location of packaging.

1.8 REGULATORY REQUIREMENTS

A. Comply with regulatory agencies for fertilizer and herbicide composition.

B. Provide certificate of compliance from authority having jurisdiction approval of seed mixture.

1.9 DELIVERY, STORAGE, AND HANDLING

A. Deliver grass seed mixture in sealed containers. Seed in damaged packaging is not acceptable.

B. Deliver fertilizer in waterproof bags showing weight, chemical analysis, and name of manufacturer.

1.10 MAINTENANCE SERVICE

A. Maintain seeded areas immediately after placement until grass is well established and exhibits a vigorous growing condition for two cuttings.

2 PART 2 PRODUCTS

2.1 SEED MIXTURE

A. Seed Mixture # 1 Common Bermuda Grass: 100 percent (Hulled)

B. Seed Mixture # 2 Annual Rye Grass: 50 percent Perennial Rye Grass: 50 percent

2.2 SOIL MATERIALS

A. Topsoil: Excavated from site and free of weeds.

2.3 ACCESSORIES

A. Mulching Material: Dry oat or wheat straw, free from weeds, and foreign matter detrimental to plant life. Hay or chopped cornstalks are not acceptable.

B. Fertilizer: FS o-f-241, Type I, Grade A; recommended for grass, with fifth percent of the elements derived from organic sources; of proportion necessary to eliminate any deficiencies of topsoil, to the following proportions:

Nitrogen 10 percent, phosphoric acid 10 percent, soluble potash 10 percent.

C. Water: Clean, fresh and free of substances or matter which could inhibit vigorous growth of grass.

2.4 TESTS

A. Testing is not required.

3 PART 3 EXECUTION

3.1 EXAMINATION

A. Verify that prepared soil base is ready to receive the work of this section.

3.2 PREPARATION OF SUBSOIL

A. Prepare sub-soil to eliminate uneven areas and low spots.

Maintain lines, levels, profiles and contours. Make changes in grade gradual. Blend slopes into level areas.

B. Remove foreign materials, weeds and undesirable plants and their roots. Remove contaminated sub-soil.

C. Scarify subsoil to a depth of 3 inches where topsoil is to be placed. Repeat cultivation in areas where equipment, used for hauling and spreading topsoil, has compacted sub-soil.

3.3 PLACING TOPSOIL

A. Spread topsoil to a minimum depth of 4 inches over areas to be seeded. Rake until smooth.

B. Place topsoil during dry weather and on dry unfrozen subgrade.

C. Remove vegetable matter and foreign non-organic material from topsoil while spreading.

D. Grade topsoil to eliminate rough, low or soft areas, and to ensure positive drainage.

3.4 FERTILIZING

A. Apply fertilizer in accordance with manufacturer’s instructions.

B. Apply after smooth raking of topsoil.

C. Do not apply fertilizer at same time or with same machine as will be used to apply seed.

D. Mix thoroughly into upper 2 inches of topsoil.

E. Lightly water to aid the dissipation of fertilizer.

3.5 SEEDING

A. Apply seed at a rate of 6 lbs per 1000 sq ft evenly in two intersecting directions. Rake in lightly.

B. Do not seed areas in excess of that which can be mulched on same day.

C. Planting Season: Seed Mix # 1 -3/15 - 7/31 Seed Mix # 2 -8/1 - 11/15

D. Do not sow immediately following rain, when ground is too dry, or during windy periods.

E. Immediately following seeding, apply mulch to a thickness of 1/8 inches. Maintain clear of shrubs and trees.

F. Apply water with a fine spray immediately after each area has been mulched. Saturate to 4 inches of soil.

3.6 SEED PROTECTION

A. Identify seeded areas with stakes and string around area periphery. Set string height to 12 inches. Space stakes at 10 feet.

B. Cover seeded slopes where grade is 4 inches per foot or greater with an approved erosion fabric. Roll fabric onto slopes without stretching or pulling.

C. Lay fabric smoothly on surface, bury top end of each section in 6 inch deep excavated topsoil trench. Provide 12 inch overlap of adjacent rolls. Backfill trench and rake smooth, level with adjacent soil.

D. Secure outside edges and overlaps at 36 inch intervals with stakes.

E. Lightly dress slopes with topsoil to ensure close contact between fabric and soil.

F. At sides of ditches, lay fabric laps in direction of water flow. Lap ends and edges minimum 6 inches.

3.7 SCHEDULE

A. Seeded Areas: Grass seed mixture specified, 4 inch top soil on all disturbed areas.

END OF SECTION

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