B09_Amendment06_32_92_00_-_Seeding_and_Mulching_0006.pdf
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- Attached to
- BICY 229154 Federal contract opportunity
- Solicitation number
- 140P2024R0084
About this file
This is a technical specification section (32 9200) for seeding and mulching work related to the Big Cypress National Preserve Fire Station construction project. The document details requirements for establishing grass areas through seeding and mulching operations.
The specification requires a grass seed mixture of 20% Bermuda seed and 80% Argentine Bahia seed, with minimum pure seed content of 95% for both varieties. Fertilizer must be 18-12-8 chemical composition with specific sulfur requirements. Key execution requirements include: soil preparation to 4-inch depth, pH adjustment to 6.0-7.0, fertilizer application at 400-500 pounds per acre, seed application at 100 pounds per acre, and mandatory rolling operations. The contractor must maintain seeded areas for at least 2 weeks after planting, including watering and mowing when grass reaches 12 inches. The contractor is responsible for repairing any damaged areas or failed grass establishment at their expense, unless factors are beyond their control. Operations cannot be performed when wind speeds exceed 15 mph or when soil conditions are unsuitable.
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Text version
BICY - 229154
32 9200 - 1
SEEDING AND MULCHING
SECTION 32 9200
PART 1 GENERAL
1.1 WORK INCLUDED
A. The work consists of establishing a stand of grass on the areas shown on the Drawings. Also included are mulching, fertilizing, watering, and maintenance as required to produce a healthy stand of grass.
1.2 SUBMITTALS
A. Certification: Certification of quality by producer shall be delivered to Contracting Officer ten days prior to use.
PART 2 PRODUCTS
2.1 MATERIALS
A. Seed: Grassing shall be in accordance with Section 570-1 through 570-3 of the FDOT
Specifications and as follows:
1. Grass seed shall be a mixture of 20 parts of Bermuda seed and 80 parts of Argentine Bahia seed. The separate types of seed used shall be thoroughly dry mixed immediately before sowing. Seed which has become wet shall not
2. The Bermuda seed shall be of a common variety with a minimum pure seed content of 95% and a minimum germination of 85%. The Argentine Bahia seed shall be scarified seed, having a minimum pure seed content of 95% with an active germination of 40 percent and a total germination of 85 percent. All seed shall meet the requirements of the State
Department of Agriculture and Consumer Services and all applicable state laws and shall be approved by the Contracting Officer before being sown.
B. Commercial Fertilizer:
1. Commercial fertilizers shall comply with the state fertilizer and herbicide composition requirements.
2. The numeral designations for fertilizer indicate the minimum percentages respectively of (1) total nitrogen, (2) available phosphoric acid and (3) water soluble potash, contained in the fertilizer.
3. The chemical designation of the fertilizer shall be 18-12-8. At least 50 percent of the phosphoric acid shall be from normal super phosphate or an equivalent source which will provide a minimum of two units of sulfur. The amount of sulfur shall be indicated on the quantitative analysis card attached to each bag or other container.
C. Water For Grassing: The water used in the grassing operations shall be obtained from the
Contracting Officer once the plant irrigation system is substantially complete. Sodding operations shall not be made prematurely. Salt water and off-site water shall not be used.
2.2 EQUIPMENT
A. Fertilizer Spreader: The device for spreading fertilizer shall be capable of uniformly distributing the material at the specified rate.
twilliams Strikethrough once the plant irrigation system is substantially complete
32 9200 - 2
B. Seed Spreader: The seed spreader shall be an approved mechanical hand spreader or other approved type of spreader.
C. Rollers: A cultipacker, traffic roller, or other suitable equipment will be required for rolling the grassed areas.
PART 3 EXECUTION
3.1 PREPARATION
A. Preparation Of Area To Be Seeded: The ground to be seeded shall be prepared by disc harrowing and thoroughly pulverizing the soil to a depth of 4 inches. The prepared soil shall be loose and reasonably smooth. It shall be reasonably free of large clods, roots and other material which will interfere with the work and subsequent mowing and maintenance operations. Hand picking may be required.
B. soil analysis: Before applying fertilizer, the soil pH shall be brought to a minimum range of 6.0
7.0.
3.2 APPLICATION
A. General:
1. Grassing shall be in accordance with Section 570-4 through 570-5 of the FDOT
Specifications.
2. Mulching shall be in accordance with Section 570-4.6 of the FDOT Specifications.
3. Weather Limitations: Fertilizing, seeding or mulching operations will not be permitted when wind velocities exceed 15 miles per hour. Seed shall be sown only when the soil is moist and in proper condition to induce growth. No seeding shall be done when the ground is unduly wet, or otherwise not in a tillable condition.
4. Sequence Of Operations: The several operations involved in the work shall proceed in the following sequence: Preparation and fertilizing of the ground, seeding and rolling.
B. Fertilizing:
1. The fertilizer shall be spread uniformly at the rate of 400 to 500 pounds per acre, by a spreading device capable of uniformly distributing the material at the specified rate.
Immediately after spreading, the fertilizer shall be mixed with the soil to a depth of approximately 4 inches.
C. Seeding:
1. While the soil is still loose and moist, the seed shall be scattered uniformly over the grassing area at a rate of 100 pounds per acre.
2. When so directed by the Contracting Officer, seed of an approved quick growing species of grass, such as rye, Italian rye, millet or other cereal grass, shall be spread at a rate of 30 pounds per acre in conjunction with the permanent type seed mixture.
D. Rolling: Immediately after completion of the mulching, the entire seeded and mulched area shall be rolled thoroughly with the equipment specified. At least two trips over the entire area will be required.
32 9200 - 3
E. Watering: The seeded areas shall be watered so as to provide optimum growth conditions for the establishment of the grass. In no case, however, shall the period of maintaining such moisture be less than 2 weeks after the planting.
F. Maintenance:
1. Grassing and mulching shall be maintained in accordance with Section 570-4.8 and 570-5 of the FDOT Specifications.
2. The Contractor shall, at his expense, maintain the seeded areas in a satisfactory condition until final acceptance of the project. Such maintenance shall include the repairing of any damaged areas where the establishment of the grass stand does not appear to be developing satisfactorily, or where erosion has washed away an area and filling and leveling are required.
3. Replanting or repair necessary due to the Contractor's negligence, carelessness or failure to provide routine maintenance shall be at the Contractor's expense. Replanting necessary due to factors determined to be beyond the control of the Contractor shall be paid for under the appropriate contract pay items.
G. Mowing: Provide initial mowing of the seeded areas when the grass reaches a height of 12" and then at a rate of 1 mowing per month during the growth months and once at the end of the project at final completion.
END OF SECTION
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