TURF OF EDUCATIONAL CENTER
Has been made turf project of an education center.
TURF
PART 1 - GENERAL
This section covers seeding of all areas not paved within the limits of construction and all areas outside the project area disturbed by construction operations.
SEED
Seed for permanent seeding shall consist of the following mixture of seed by weight:
20% Lolium Perenne 5% Agrostis Tenuis
10% Poa Pratensis
45% Festuca Arundinacea « Bardeluc »
20% Festuca Ovina
Seed for temporary seeding shall consist of 100 percent annual rye. All seed shall be furnished in sealed and labeled standard containers. Seed that has become wet, or otherwise damaged in transit or in storage will not be acceptable. The minimum percentage by weight of pure live seed in each lot of seed shall be 88 percent. The maximum percent by weight of material other than the grass seed stated above shall include the following: Non-viable seed, chaff, hulls, live seed of crop plants other than the pure live seed, harmless inert matter; and weed seed not exceeding 2 percent by weight of the total of pure live seed and other material in the mixtures. Minimum seed quantity shall be 35 grams/ square meter.
FERTILIZER
Fertilizer shall be 12 percent nitrogen, 18 percent phosphorus and 12 percent potassium (NPK12-18-12), distributed uniformly over the areas at the rate indicated by the producer, uniform in composition, free-flowing and suitable for application with approved equipment. Fertilizer shall be delivered to the site in bags or other convenient containers, each fully labeled, bearing the name, trade name or trade mark, and warranty of the producer.
TOPSOIL
As defined in Section 02315, "Excavation and Fill".
WATER
Water shall be free from oil, alkali, salt and other substances harmful to growth of grass. The water source shall be subject to the approval of the Contracting Officer prior to use.
PESTICIDES AND HERBICIDES
Storage, use and disposal of pesticides and herbicides shall be in accordance with Italian National, Regional and local laws.
PREPARATION OF SEED BED
General
The areas to be seeded shall be all areas stated in "Part 1 GENERAL" above. Equipment necessary for the proper preparation of the ground surface and for handling and placing all required materials shall be on hand, in good condition, and shall be approved by the Contracting Officer before the work is started.
Tillage
After the areas required to be seeded have been brought to the required subgrade, thoroughly till to a depth of at least 15 centimeters by scarifying, disking, harrowing, or other approved methods. Remove debris and stones larger than 2.5 centimeters remaining on the surface after tillage.
Topsoiling
Prior to placing topsoil, scarify the subgrade to a 5 centimeters depth for bonding of topsoil with subsoil. Spread the topsoil evenly to a minimum depth of 10 centimeters. Do not spread topsoil when frozen or excessively wet or dry. Correct irregularities in finished surfaces to eliminate depressions. Protect finished topsoil areas from damage by vehicular or pedestrian traffic. Provide seeding only after areas have been brought to proper grade.
Application of Fertilizer
Fertilizer shall be distributed uniformly over the areas to be seeded at the rate of 800-1000 kilograms per hectare. It shall be mixed into the soil by disking, harrowing, or other methods acceptable to the Contracting Officer. Distribution by means of an approved seed drill equipped to sow seed and distribute fertilizer at the same time will be acceptable.
Leveling
Surface irregularities resulting from fertilizing or other operations shall be leveled out before seeding operations are begun.
PLANTING SEED
General
All seeding work shall be done during the most favorable planting season for the designated species, except as otherwise directed in writing by the Contracting Officer. A method of sowing satisfactory to the Contracting Officer shall be employed, making use of an approved mechanical seeder, hand-seeder or other approved equipment. When delays in operations carry the work beyond the most favorable planting season for the species designated, or when by reason of drought, high winds, excessive moisture, or other factors, satisfactory results are not likely to be obtained, the Contracting Officer will stop the work. Work shall be resumed only when conditions are favorable again or when approved alternate procedures or corrective measures have been put into effect. If, during seeding, or after the grass has grown, unseeded areas are discovered, these shall be reseeded by the Contractor at no additional cost to the Government.
Broadcast Seeding
Seed shall be broadcast either by hand or approved sowing equipment at the rate of 150 kilograms per hectare. The seed shall be uniformly distributed over the designated areas. Half the seed shall be sown with the sower moving in one direction, and the remainder shall be sown with the sower moving at right angles to the first sowing. Broadcast seeding shall not be done during windy weather.
Compacting
Immediately after the planting operations have been completed, the entire area shall be compacted by means of approved equipment.
Protection
After the seeding is completed, the area shall be protected against traffic or other use by placing warning signs on the various areas.
Watering
Water shall be applied immediately after final compaction. Watering shall be at the rate prescribed for the types of seed specified. Additional applications shall be made as directed by the Contracting Officer. Water shall be delivered in containers equipped with satisfactory means for even distribution of water at the specified rate. Watering shall be done in a manner to prevent erosion due to the application of excessive quantities, and the watering equipment shall be of a type that will prevent damage to the finished surface.
ESTABLISHMENT
General
The Contractor shall be responsible for proper care of the seeded areas during the period when the grass is becoming established. This period shall extend for four months after the completion of the seeding on the entire project, unless the desired cover is established in a shorter period of time, and the Contracting Officer authorizes a shorter period of responsibility by the Contractor.
Refertilizing
Areas needing refertilizing will be designated by the Contracting Officer. The fertilizer shall be distributed on the seeded areas during a period when the grass is dry. The fertilizer shall be of type and grade specified and applied at the rate specified hereinbefore.
Establishment Period
The turf establishment period will be in effect until the turf has been mowed two times.
Turf
A stand of turf is defined as 95 percent ground cover of the species established.
Care
The Contractor is responsible for the establishment and proper care of a stand of turf over the entire seeded area. Maintenance During the Establishment Period
Perform the following maintenance
Mowing, removal of excess clippings, eradicating weeds, watering, fertilizing, overseeding, and other operation necessary to promote the growth of grass or legumes.
Mowing Height
Mow the seeded area to an average height of 3 centimeters whenever the average height of the grass becomes 6 centimeters.
FINAL ACCEPTANCE
General
Final inspection and acceptance will be at the end of the turf establishment period. Acceptance will be based upon a satisfactory standard of turf establishment as defined hereinbefore.
Replanting
Areas which do not have a minimum of 95 percent ground cover of the established species shall be replanted. Replant rejected areas of turf within acceptable planting dates as directed by the Contracting Officer.
Repairs
If at any time before completion and acceptance of the entire work covered by this contract, any portion of the surface becomes gullied or otherwise damaged following seeding, or the grass seedings have been destroyed, the affected area shall be repaired to re-establish the condition and grade of the soil prior to seeding and shall then be reseeded and the grass established as specified. Repairs shall be at no additional cost to the Government.