02932 Establish Turf.doc

Base Pavements IDIQ

JCGU 09-1700

DIVISION 02 - SITE WORK

SECTION 02932 - ESTABLISHMENT OF TURF

AND SITE GROUND COVERINGS

PART 1 – GENERAL:

1.1 DESCRIPTION: After completion of the topsoiling operation, all bare topsoil within the limits of construction shall receive hydromulch. The Contractor shall furnish all labor, tools, materials and equipment necessary to provide turf as described in the Task Order (TO) and specified herein. Turf work shall be accomplished only when satisfactory results can be expected. When conditions such as drought, excessive moisture, high winds, or other factors prevail to such an extent that satisfactory results are not likely to be obtained. Establishment of turf shall be accomplished on all unpaved graded and disturbed areas that are the result of the Contractor's operations. The work shall include the application of seed, fertilizer, mulch, water, and all other operations necessary to provide the growth specified herein.

1.2 REFERENCES: The publications listed below form a part of this specification to the extent referenced. The publications are referred to in the text by basic designation only. All publications shall be the latest version/edition/revision of the documents listed below, in effect on the date of this solicitation, except where a date is given.

FEDERAL SPECIFICATIONS

FS O-F-241 Fertilizers, Mixed, Commercial

PART 2 – PRODUCTS:

2.1 TOPSOIL: All topsoil necessary to complete the work shall be obtained from topsoil stockpiles from grading and excavating operations and from approved topsoil sources off of Government controlled property. Topsoil shall be free from tree roots, stones, shale, parent and other materials that hinder grading, planting, plant growth and maintenance operations, and free from noxious and other objectionable weed seeds and toxic substances.

2.2 TURF MATERIALS: Materials used in the hydromulching operation shall be of the best quality available. The hydromulch shall contain no weed seed and shall consist of the following:

Summer Grasses - applied from May 1 to October 31

Conwed - 2000 wood cellulose fiber

Hulled Bermuda grass seed

8-8-8 Fertilizer

The mixture shall be applied at the following rates:

50 lb. Conwed per 1000 square feet

1 lb. Bermuda Grass seed per 1000 square feet

7 gal. liquid Fertilizer per 5000 square feet, or

70 lb. granular Fertilizer per 5000 square feet

Winter Grasses - applied from November 1 to April 30 Conwed - 2000 wood cellulose fiber Fescue seed 8-8-8 Fertilizer The mixture shall be applied at the following rates:

50 lb. Conwed per 1000 square feet 8 lb. Fescue seed per 1000 square feet 7 gal. liquid Fertilizer per 5000 square feet, or 70 lb. granular Fertilizer per 5000 square feet

2.2.1 Any deviation from the above rates and application seasons shall be submitted for approved by the Contracting Officer.

2.2.2 Hydroseed shall be furnished and placed free of noxious weeds and undesirable plants, stones, roots of trees, and other materials that hinder development and maintenance.

2.2.3 Water shall be free from oil, acid, alkali, salt, and other substances harmful to growth of grass, and shall be from a source approved prior to use.

2.2.4 Ground Covers: Prior to placement, the Contractor shall apply weed/grass killer in accordance with manufacturer’s directions and best commercial practices. The Contractor shall turn over all site soil to a depth of 12 inches to ensure all soil is free of all existing weeds/vegetation.

2.2.5 River Rock: Washed and graded Colorado river natural gravel (color white-gray). Rock gradation shall be one-half inch (1/2”) to four (4”).

2.2.6 Lava Rock: Crushed and screened, open structured red colored volcanic scoria. Gradation shall be on-quarter inch (1/2”) to one-half inches (1-1/2”).

2.2.7 Multi-Color River Gravel: Washed and graded Colorado river natural gravel (color gray-black). Rock gradation shall be one-half inch (1/2”) to four (4”).

2.2.8 Landscape Weed Barrier: Woven type weed barrier that will not rot., mildew or brittle in cold weather, won’t tear or puncture when walked on. The Contractor shall be responsible for installing three layers of landscape weed barrier. Weed barrier shall be cut to accommodate existing or new plantings as necessary. All weed barrier shall be placed in three (3) layers.

PART 3 – EXECUTION:

3.1 TOPSOIL: Graded areas shall be topsoiled where indicated on plans and where it is determined by the Contracting Officer that at least 4 inches of suitable soil for the growth of grass is not present. Equipment necessary for handling and placing all materials required shall be on hand, in good condition and shall be approved before the work is started. Grades on the areas to be topsoiled are as described on the plans and shall be maintained in a true and even condition.

3.1.1 Placing Topsoil: Topsoil shall be uniformly distributed and evenly spread to an average thickness of 4 inches, with a minimum thickness of 3 inches. Topsoil shall be spread so that planting can proceed with little additional soil preparation or tillage. Surface irregularities resulting from topsoiling or other operations shall be leveled to prevent depressions. The grades shall be adjusted to assure that the planted grade shall be 1- inch below the adjoining grade of any surfaced area. Topsoil shall not be placed when the subgrade is frozen, excessively wet or compacted, extremely dry, or in a condition detrimental to the proposed planting or grading.

3.1.2 Cleanup: Prior to topsoiling, vegetation that may interfere with operations shall be mowed, grubbed, and raked. The collected material shall be removed from the site. The surface shall be cleaned of stumps, and stones larger than 1 inch in diameter, and roots, cable, wire and other materials that might hinder the work or subsequent maintenance shall also be removed.

3.1.3 Repair: Where any portion of the surfaces becomes gullied or otherwise damaged, the affected area shall be repaired to establish the condition and grade prior to topsoiling, and then shall be re-topsoiled as specified in Paragraph 3.1.1, Placing Topsoil.

3.2 TURF: After topsoil has been placed, hydromulching shall be performed in accordance with standard practices, as approved by the Contracting Officer. All areas to receive hydromulching shall be cultivated to a depth of at least one inch (1"). The cross section previously established shall be maintained throughout the process of cultivation and any necessary reshaping shall be done prior to hydromulching. The Contractor is put on notice that they may be required to provide clean water/transportation to the site if it is not readily available by the Government.

3.2.1 Fertilizer: Fertilizer shall be applied not more than 24 hours in advance of tilling operations. Fertilizer shall be distributed with a fertilizer distributor (Ezee Flow) or approved equal. Fertilizer shall be uniformly distributed.

3.3 TURF MAINTENANCE: It shall be the responsibility of the Contractor to maintain the planted areas during the planting period and for an additional period of not less than 45 calendar days. Maintenance work shall be accomplished until an acceptable stand of grass is present. A stand of grass is defined as 2” tall minimum green grass with no bare spots. Maintenance shall consist of watering, replanting, mowing, maintaining existing grades, and repair of erosion damage. Areas on which an acceptable stand of grass is not present at the end of the 45 days period shall be hydroseeded again, and maintained by the Contractor until an acceptable stand of grass is present at no additional cost to the Government.

3.3.1 Watering: The Contractor shall be responsible for applying water at sufficient quantity and frequency to establish an acceptable stand of grass.

3.3.2 Replanting: Areas on which a stand of growing grass is not present in a reasonable length of time, it shall be hydroseeded again in accordance with the appropriate planting season and shall continue to be hydroseeded and maintained throughout the maintenance period until an acceptable stand is obtained. A stand shall be defined as live grass plants from hydromulching occurring over 95% of the area, with no more than 10 square feet left uncovered in any one place.

3.3.3 Mowing: Vegetation shall be kept under control by mowing. Any time that the weed or grass growth reaches a height of 3 inches, the areas shall be mowed. Mowing shall be done with approved mowing machines in such manner that shall leave a vegetation height of between 2 and 2½ inches.

3.3.4 Maintenance of Grades and Repair of Erosion Damage: It shall be the responsibility of the Contractor to maintain the original grades of the lawn areas after the commencement of planting operations. Any damage to the finished surface from Contractor's operations shall be promptly repaired. In the event erosion occurs from either watering operations or from rainfall, such damage shall be prompted repaired. Ruts, ridges, tracks, and other surface irregularities shall be corrected and the areas replanted, where required, prior to acceptance.

3.3.5 The Contractor responsibility for turf establishment and maintenance may exceed the performance period of a Task Order.

3.4 GROUND COVER PLACEMENT AND CLEANUP: The Contractor shall ensure a uniform layer of ground cover rock is evenly placed. Each layer shall not exceed 2 (two) inches of depth. After completion of all ground cover placement, the Contractor shall thoroughly sweep/clean all surrounding areas and remove all debris and foreign matter from the site.

END OF SECTION

Section 02932 – Page 1 of 4