atch 1 2936 Hydro Seeding.pdf

Topsoil & Hydro Seeding FA5000-12-R-0001 Attachment 1

2936- 1

1. SCOPE:

1.1 Placing topsoil, fertilizing, seeding, and maintaining.

2. RELATED WORK:

2.1 Section 2510 - Concrete Sidewalks and Curbs and Gutters.

3. REFERENCES

3.1 Fed Spec FS O-F-241 - Fertilizers, Mixed, Commercial.

4. DEFINITIONS.

4.1 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.

5. REGULATORY REQUIREMENTS:

5.1 Comply with regulatory agencies for fertilizer and herbicide composition.

6. QUALITY ASSURANCE:

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

7. TESTS:

7.1 Testing is not required if recent tests are available for imported topsoil. Submit these test results to the testing laboratory for approval. Indicate, by test results, information necessary to determine suitability.

8. DELIVERY, STORAGE, AND HANDLING:

8.1 Deliver products to site IAW manufacturer's provisions and instructions.

8.2 Store and protect products properly.

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

8.4 Deliver fertilizer in waterproof bags showing weight, chemical analysis, and name of

Pavements - IDIQ

FXSB 11-2102

Section 2936

Topsoil & Hydro seeding

2936- 2 manufacturer.

9. SEED MIXTURE:

9.1 Seed Mixture:

9.1.1 Creeping Red Fescue Grass: 50 percent.

9.1.2 Norlea Perennial Rye: 50 percent.

9.1.3 Or approved equal to meet the Municipality of Anchorage hydro seeding specifications.

10. SOIL MATERIALS:

10.1 Topsoil: Clean, natural, fertile, friable, surface soil without admixtures of subsoil, refuse, foreign materials, roots, noxious weeds, brush, sticks, stubble, litter, debris, gravel and stones over 3/8 inches.

10.1.1 Topsoil Mix: As specified below or approved equal for Alaskan conditions.

PART 3 – EXECUTION:

11. INSPECTION:

11.1 Verify that prepared soil BASE is ready to receive the work of this Section.

12. PREPARATION OF SUBSOIL:

12.1 Prepare subsoil to eliminate uneven areas and low spots. Maintain lines, levels, profiles and contours. Make changes in grade gradual. Blend slopes into level areas.

12.2 Remove foreign materials, weeds, and undesirable plants and their roots. Remove contaminated subsoil.

12.3 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 subsoil.

13. PLACING TOPSOIL:

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

Organic Material 15% to 25% by dry weight of total sample (organic matter is to be determined by loss-on-ignition of oven-dried material IAW

ASTM D-2974).

Silt 15% to 40% by dry weight of the total sample.

Sand 35% to 55% by dry weight of the total sample.

2936- 3

Place topsoil during dry weather and on dry unfrozen sub-grade. Remove vegetable matter and foreign non-organic material while spreading.

13.2 Grade to eliminate rough, low, or soft areas, and to ensure positive drainage. Install edging at periphery of seeded areas in straight lines to consistent depth.

13.3 Lightly compact placed topsoil until surface does not compact further with each passage of a roller weighing approx 50 lbs per linear foot of roller.

13.4 Install edging at periphery of seeded areas in straight lines to consistent depth.

14. FERTILIZING:

14.1 Apply fertilizer in accordance with manufacturer's instructions.

14.2 Apply after smooth raking of topsoil and prior to roller compaction.

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

14.4 Mix thoroughly into upper 1 to 2 inches of topsoil.

14.5 Lightly water to aid the dissipation of fertilizer.

15. SEEDING:

15.1 Apply seed at a rate of 4 lbs per l000 sq ft evenly in two intersecting directions. Rake in lightly.

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

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

15.3 Roll seeded area with roller not exceeding 112 lbs.

15.4 Immediately following seeding and compacting, apply mulch to a thickness of 1/8 inches.

Maintain clear of shrubs and trees.

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

15.6 Hydro seeding

is an acceptable alternate method.

15.6.1 Seed and fertilizer shall be added to water and thoroughly mixed at a rate as specified by the manufacturer for Alaska conditions. Wood cellulose fiber mulch shall be added at the rate recommended by the manufacturer after the seed, fertilizer, and water have been thoroughly mixed, to produce a homogeneous slurry. The slurry shall be applied under pressure over the entire area. The hydro seeded area shall not be rolled. Do not add more than a total of 220 pounds of these combined solids to each 100 gallons of water.

15.6.2 Watering shall be started within 2 days after completing the hydro seeded area or the seeded area. Water shall be applied at a rate sufficient to ensure moist conditions to a minimum depth of 1 inch. Runoff and puddling shall be prevented. Watering shall be at intervals to obtain a moist soil

2936- 4 condition. Frequency of watering and quantity of water shall be adjusted with the growth of the turf.

15.6.3 Continue watering until the grass is at least 4" high, and is ready to cut. The first mowing will be accomplished by the contractor.

Further mowing will be by JBER personnel.

16. SEED PROTECTION:

16.1 Identify seeded areas with stakes and string around area periphery. Set string height to 18 inches. Space stakes at 8 feet.

17. SUBMITTALS:

17.1 Submit certification for type of seeds and fertilizer.

17.2 Submit certification for topsoil mix.

18. CLEAN-UP

18.1 Keep the premises clear of hazardous obstructions. Remove tools, surplus materials, equipment, and debris. Broom-clean paved areas where debris, soil or dust accumulations are present. Remove and properly dispose of debris. Remove all temporary construction facilities and unused material provided for the work upon completion of the work. Place the premises in a neat and clean condition. Clean all sidewalks, roads, fire hydrants, or exterior of buildings if they have been oversprayed with hydro seeding.

19. UNIT OF MEASUREMENT AND PAYMENT: Per the Bid Schedule and Section 1020.

End of Section