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    SECTION 02480

    LANDSCAPE WORK

   PART 1 - GENERAL

   1.01 DESCRIPTION OF WORK

   A. Extent of landscape development work is as required for restoration.

   B. Subgrade Elevations: Excavation, filling and grading required to establish elevations shown on drawings are not specified in this section. Refer to earthwork sections.

   1.02 QUALITY ASSURANCE

   A. Subcontract landscape work to a single firm specializing in landscape work for planting work or restoration in excess of 1 acre (single site).

   B Source Quality Control:

   1. General: Ship landscape materials with certificates of inspection required by governing authorities. Comply with regulations applicable to landscape materials.

   2. Do not make substitutions. If specified landscape material is not obtainable, submit proof of non-availability from a minimum of 6 suppliers to Engineer, together with proposal for use of equivalent material.

   C. Analysis and Standards: Package standard products with manufacturer's certified analysis. For other materials, provide analysis by recognized laboratory made in accordance with method established by the Association of Official Agriculture Chemists, wherever applicable.

   1.03 SUBMITTALS

   A. Certification: Submit certificates of inspection as required by governmental authorities. Submit manufacturer's or vendors certified analysis for soil amendments and fertilizer materials. Submit other data substantiating that materials comply with specified requirements.

   1. Submit seed vendor's certified statement for each grass seed mixture required, stating botanical and common name, percentage by weight, and percentages of purity, germination, and week seed for each grass seed species.

   B. Planting Schedule: Submit proposed planting schedule, indicating dates for each type of landscape work during normal seasons for such work in area of site. Correlate with specified maintenance periods to provide maintenance from date of substantial completion. Once accepted, revise dates only as approved in writing, after documentation of reasons for delays.

   C. Maintenance Instructions: Submit typewritten instructions recommending procedures to be established by Owner for maintenance of landscape work for one full year. Submit prior to expiration of required maintenance period(s).

   1.04 DELIVERY, STORAGE AND HANDLING

   A. Packaged Materials: Deliver packaged materials in containers showing weight, analysis and name of manufacturer. Protect materials from deterioration during delivery, and while stored at site.

   1.05 JOB CONDITIONS

   A. Proceed with the complete landscape work as rapidly as portions of site become available, working within seasonal limitations for each kind of landscape work required.

   B. Utilities: Determine location of underground utilities and perform work in a manner which will avoid possible damage. Hand excavate, as required. Maintain grade stakes set by others until removal is mutually agreed upon by parties concerned.

   C. Excavation: When conditions detrimental to plant growth are encountered, such as rubble fill, adverse drainage conditions, or obstructions, notify Engineer before planting.

   D. Planting Time: Plant or install materials during normal planting seasons for each type of landscape work required. Correlate planting with specified maintenance periods to provide maintenance from date of substantial completion.

   E. Planting Schedule: Prepare a proposed planting schedule. Schedule dates for each type of landscape work during normal seasons for such work in area of site. Correlate with specified maintenance periods to provide maintenance from date of substantial completion. Once accepted, revise dates only as approved in writing, after documentation of reasons for delays.

   F. Coordination with Lawns: Plant trees and shrubs after final grades are established and prior to planting of lawns, unless otherwise acceptable to Engineer. If planting of trees and shrubs occurs after lawn work, protect lawn areas and promptly repair damage to lawns resulting from planting operations.

   1.06 SPECIAL PROJECT WARRANTY

   A. Warranty lawns through specified lawn maintenance period, and until final acceptance.

   PART 2 - PRODUCTS

   2.01 TOPSOIL

   A. Topsoil for landscape work may not available at site in sufficient quantity and must be furnished as specified.

   B. New topsoil shall be fertile, friable, natural loam, surface soil, reasonably free of subsoil, clay lumps, brush, weeds and other litter, and free of roots, stumps, stones larger than 2" in any dimension, and other extraneous or toxic matter harmful to plant growth. Topsoil to have minimum 2% organic material established by a laboratory burn test.

   1. Obtain topsoil from local sources or from areas having similar soil characteristics to that found at project site. Obtain topsoil only from naturally, well-drained sites where topsoil occurs in a depth of not less than 4"; do not obtain from bogs or marshes.

   2.02 SOIL AMENDMENTS

   A. Lime: Natural limestone containing not less than 85% of total carbonates, ground so that not less than 90% passes a 10-mesh sieve and not less than 50% passes a 100-mesh sieve. Apply if pH of soil is less than 6.0.

   B. Peat Humus: FS Q-P-166 and with texture and ph range suitable for intended use. Well shredded.

   C. Superphosphate: Soluble mixture of treated minerals; 20% available phosphoric acid. Apply if soil test indicates a phosphorous deficiency.

   D. Sand: Clean, washed sand, free of toxic materials.

   E. Manure: Well rotted, unleached stable or cattle manure containing not more than 25% by volume by straw, sawdust or other bedding materials and containing no chemicals or ingredients harmful to plants.

   F. Mulch: Organic mulch free from deleterious materials and suitable for top dressing of trees, shrubs or plants and consisting of one of the following:

   1. Ground or shredded bark.

   G. Commercial Fertilizer: Complete fertilizer of neutral character, with some elements derived from organic sources and containing following percentages of available plant nutrients:

   1. For trees and shrubs, provide fertilizer with not less than 5% total nitrogen 10% available phosphoric acid and 10% soluble potash.

   2. For lawns, provide fertilizer with percentage of nitrogen required to provide not less than 1 lb. of actual nitrogen per 100 sq. ft. of lawn area and not less than 4% phosphoric acid and 2% potassium. Provide nitrogen in a form that will be available to lawn during initial period of growth; at least 50% of nitrogen to be organic form.

   H. Topsoil Mix: Topsoil mix shall be a clean uniform mixture of the following composition:

   1. 60% sand

   2. 30% topsoil

   3. 10% peat humus, manure or other approved dampened organic matter.

   4. Topsoil mix is intended for trees, shrubs, ground cover and planting beds only. Seeded areas shall receive topsoil only.

   I. Add 3 lbs. of 5-10-10 fertilizer to each cubic yard of topsoil mix and blend in thoroughly.

   2.03 GRASS MATERIALS

   A. Grass Seed: Provide fresh, clean, new-crop seed complying with tolerance for purity and germination established by Official Seed. Analysts of North America. Provide seed mixture composed of grass species, proportions and minimum percentages of purity, germination, and maximum percentage of weed seed, as specified.

   B. Grass Seed Mixture by Weight: Kentucky 31 tall Fescue - 75%; Sericea Lespedeza, Common (Scarified) - 15%; Ledino White Clover - 5%; Kenstar Red Clover - 5%.

   PART 3 - EXECUTION

   3.01 PREPARATION

   A. Preparation of Planting Lawns:

   1. Before mixing, clean topsoil of roots, plants, sods, stones, clay lumps, and other extraneous materials harmful or toxic to plant growth.

   2. Mix fertilizers with topsoil at rates specified. Delay mixing of fertilizer if planting will not follow placing of planting soil within a few days.

   B. For pit and trench type backfill, mix planting soil prior to backfilling, and stockpile at site.

   C. For planting beds mix planting soil either prior to planting or apply on surface of topsoil and mix thoroughly before planting.

   1. Mix lime with dry soil prior to mixing of fertilizer if pH of soil is less than 6.0.

   2. Prevent lime from contacting roots of acid-loving plants.

   D. Preparation for Planting Lawns:

   1. Loosen subgrade of lawn areas to a minimum depth of 4". Remove stones over 1-1/2" in any dimension and sticks, roots, rubbish and other extraneous matter. Limit preparation to areas which will be planted promptly after preparation.

   2. Spread topsoil to mixture to minimum depth required to meet lines, grades and elevations shown, after light rolling and natural settlement. Add specified soil amendments and mix thoroughly into upper 4" of topsoil.

   3. Place approximately 1/2 of total amount of planting topsoil required. Work into top of loosened subgrade to create a transition layer and then place remainder of planting soil. Add specified soil amendments and mix thoroughly into upper 4" of topsoil.

   4. Fine grade lawn areas to smooth, even surface with loose, uniformly fine texture. Roll, rake and drag lawn areas, remove ridges and fill depressions, as required to meet finish grades. Limit fine grading to areas which can be planted immediately after grading.

   5. Moisten prepared lawn areas before planting if soil is dry. Water thoroughly and allow surface moisture to dry before planting lawns. Do not create a muddy soil condition.

   6. Restore lawn areas to specified condition if eroded or otherwise disturbed after fine grading and prior to planting.

   E. Preparation of Planting Beds:

   1. Loosen subgrade of planting bed areas to a minimum depth of 6" using a cultimulcher or similar equipment. Remove stones over 1-1/2" in any dimension, and sticks, stones, rubbish and other extraneous matter.

   2. Spread topsoil mixture to minimum depth required to meet lines, grades and elevations shown, after light rolling and natural settlement. Place approximately 1/2 of total amount of planting soil required. Work into top of loosened subgrade to create a transition layer, then place remainder of the planting soil.

   3.02 SEEDING NEW LAWNS

   A. Schedule seeding operation for August 15 - October 15 or February 20 - April 15 if possible for the project duration.

   B. Do not use wet seed or seed which is moldy or otherwise damaged in transit or storage.

   C. Sow seed using a spreader or seeding machine. Do not seed when wind velocity exceeds 5 mi. per hr. Distribute seed evenly over entire area by sowing equal quantity in 2 directions at right angles to each other.

   D. Sow not less than 4 lbs. of seed mixture per 1,000 square feet.

   E. Rake seed lightly into top 1/8" of soil, roll lightly, and water with a fine spray.

   F. Protect seeded areas against erosion by spreading specified lawn mulch after completion of seeding operations. Spread uniformly to form a continuous blanket not less than 1-1/2" loose measurement over seeded areas.

   3.03 CLEANUP AND PROTECTION

   A. During landscape work, keep pavements clean and work area in an orderly condition.

   B. Protect landscape work and materials from damage due to landscape operations, operations by other contractors and trades and trespassers. Maintain protection during installation and maintenance periods. Treat, repair or replace damaged landscape work as directed.

   3.04 INSPECTION AND ACCEPTANCE

   A. When landscape work is completed, including maintenance, Engineer will, upon request, make an inspection to determine acceptability.

   B. Where inspected landscape work does not comply with requirements, replace rejected work and continue specified maintenance until reinspected by Engineer and found to be acceptable. Remove rejected plants and materials promptly from project site.

    END OF SECTION

Rembco Geotechnical Contractors specializes in slope stabilization, foundation repair and support, shoring, grouting, soil nails, micropile installations, and sinkholes. We are experienced in these applications: micro piles, sinkhole repair, permeation grouting, pressure grouting, soil nails, chemical grouting, micropiles, compaction grout, rock anchors and compaction piles. Our specialties are rock anchor, chemical and compaction grouting, mini piles, sinkhole repair, micropiles, and soil nailing. We use a problem-solving approach in the geotechnical portions of buildings, bridges, water plants, sewage plants, tunnels, sinkholes, caisson, and roads. Rembco techniques apply when adding new real estate structures: especially rock anchor, microfine grouting, soil nailing, micropile installations for foundation support. Add URL Construction, Drilling and Concrete