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HomeMy WebLinkAbout4071-8W. WEED CON 77?OL- A. KILLING WEEDS: Contractor shall germinate and destroy existing weed seeds before preparing areas for planting. Sufficlent water shall be applied to cause week seed to sprout. Young weeds shall then be destroyed and removed before they have opportunity to set seed B. ADD17IONAL REQUIREMENTS: For additional weed killing, refer to Planting Notes on the Planting Plan. Wt. SOIL PREPARATION. A. SOIL REPORT: Before starting sod preparation the Contractor shall submit a soil report to the Owner and Landscape Architect. If no sod report Is submitted it will be assumed that amendments were not added and the Landscape Contractor wdl be requested to give a credit for soil preparation. B. COMPACTED AREAS.- Sod areas that are compacted to more than 92X durLn3p site preparation shall be ripped to a minimum of 12 prior to beginning sod preparation. These areas shall be defined by the Landscape Architect and be billed as an extra if the unit price Is quoted in the bid. C. METHOD OF MIXING: If the slope Is under 2 112 to I the sod preparation materials should be broadcast uniformly over all landscape areas and worked to a depth of 6* by a rototffler or other acceptable mechanical means to obtain a uniform blend to the soil. If the slope is greater than 2 112 to 1 the amendments shall be hydraulically applied for areas over 1000 square feet and raked in for small areas. For the soil amendment mix refer to the Planting Notes on the Planting Plan. 0. EXTRANEOUS MATERIAL- In addition to the work specifled above the Contractor shall remove ag extraneous material that is exposed on the surface and grade to facHitate run-off of surface water. E. DELIVER SLIPS: Supply delivery slips from the supplier for the soil amendments to the site (Bulk loads from the Contractors ycrd will not be accepted Supply empty bags for fertilizer to the Superintendent of the job.) Wil. SHRUB AND TREE PLANTING. - A. CORRELATION.- Trees and shrubs shall not be planted until all operations in conjunction with the installation of the sprinkler system have been completed, final grades have been established, and the planting beds property prepared by cultivation and fertilization as covered in these speciflcations. B. HANDLING AND STORAGE: All plants shall be handled and stored so they are adequately protected from drying out, sun, windburn or any other in)jry. C. PLAN77NG TIME.- No planting shall take place during extremely hot, dry, windy or freezing weather. D. LOCATIONS.- Relative position of all plants and trees is subject to approval of the Landscape Architect and they shall, if necessary, be relocated at his direction as part of this contract. E. DISTRIBUTION: No more plants shall be distributed about the landscape area than can be planted and watered on the some day. F. CONTAINER REMOVAL: Plant containers shall be removed when planting the plants. Cons shall be split on both sides. An axe or spade shall not be used. All containers shall be removed from the site. G. PLANTING PITS., Ali tree and shrub pits shall have a diameter of at least twice the diameter of the rootball. Pit depths shall be minimum 12' deeper than the rootball for trees and 8' deeper than the root ball for shrubs or as per planting detalls. H. PLACING. Plants shall be placed and held during backfill In an upright position in the center of the pit. Plants shall be held at, or slightly above nursery level. The earth ball shall be kept intact. Any exposed roots shall be spread Injured roots shall be pruned. I. BACKFILL- Plant pit backrilling sod shall consist of I part nitrogen stobflized sawdust - 2 parts topsoil. Materials shall be thoroughly mixed before replacement. In addition to backfill commercial fertilizer 20-10-5 Agriform 21 gram tablets shall be added to plant pits at the following rates: • one tablet per one gallon container • two tablets per rive gallon container • three tablets per 15 gallon container • four tablets per 20' and 24* box • rive tablets per 30' box • six tablets per 36" box • seven tablets per 42* box • eight tablets per 60" box • nine tablets per 72* box • ten tablets per 84' box • ground cover plants planted from flats or liners in 2:1 or steeper slopes shall receive one 5 gram tablet per plan t J. WATERING.- Men the pit has been backfilled to three- quarters of its depth water shall be poured about the roots. Air pockets shall be eliminated and backfill continued until the backfill is brought to the grade level. K. COMPACTING.- Backill shall not be compacted around the roots or ball of the plant during or after planting. The backnil on which the plant ball rests shall be lightly compacted. M. STAKING.- Stakes shall be driven to sufficlent depth to hold tree rigid. Tree shall be supported by at least two ties (see details). 0. PRUNING.- Limbs, branches, cones and runners which require trimming shall be removed to leave a clean cut flush with trunk. (Pruning only as directed by the Landscape Architect). P. PLAN77NG BEDS: Planting beds shall be edged and cultivated to the line shown. Beds shall be brought to a smooth even surface conforming to established grades after full settlement has occurred X1. SHRUB COVER AREAS: A. REFERENCE: Refer to Paragraphs V. W. W11. for Anish grading, weed control, and soil preparation. B. SOIL PREPARATION: Prepare the sod -as per these specifications and the planting Notes on the Planting Plan. C. GRADING: Areas shall be raked and floated smooth to provide a true and uniform surface. 0. PLANT PITS AND FERTILIZER: Planting pits for ground cover shall be 4" x 4" or adequate to accept material from flats without crushing or deforming the rootball. Place a 20-10-5- Agriform 5 gram, fertilizer tablet in each ground cover. E. PLANTING: Ali ground cover areas noted on the plans shall be rooted cuttings from flats and shall be planted in staggered rows continuously under all trees and shrubs at the spacing indicated on the plans. All plants shall be protected from dr)ing out prior to planting. F. WATERING.- Each section of ground cover shall be immediately watered upon completion of planting, and thereafter as required. G. SPACING FROM EDGE: The Rrst row of ground cover should always be within 6" of the edge of the planting area. X SEASONAL COLOR: A. REFERENCE: Refer to Paragraphs V. W. WI. for flnish grading, weed control, and sod preparation. 8. SOIL PREPARATION.- Prepare the sod as per these specifications and the Planting Notes on the Planting Plan. C. GRADING.- Areas shall be raked and floated smooth to provide a true and uniform surface. 0. QUALITY OF PLANTS: Plants shall be healthy annual plant material in 4* pots in boom. E. PLANT PITS AND FERTILIZER: Each plant pit for seasonal color shall be 6"WW with one teaspoon of bone meal mix into the backM mix. (Use shrub backfill mix). Do not use Agriform plant tablets. G. WATERING.- Each section of seasonal color shall be immediately watered upon completion of planting, and watered thereafter as required H. SPACING FROM EDGE: The first row of seasonal color should always be within 6" of the edge of the planting area. X1. SOD LAM MATERIALS & PLAN77NG (IF APPLICABLE): A. QUALITY: Sod shall be lGrade, machine cut at a uniform thickness of 518 excluding t1p growth and thatch, weed free and shall be no less than eight months nor more than sixteen months old. B. TIMING., Installation shall take place within 24 hours after harvesting. C. REFERENCE: Refer to Paragraphs V. W. WI. for Anish grading, weed control, and soil preparation. 0. PREPARATION.- Sod area prior to planting shall be rolled lightly and watered to a depth of 6' the day prior to planting. If any air pockets are found, the area shall be regraded as necessary. Lightly water the area to be planted just prior to planting. E. INSTALLATION.- Sod shall be laid in a staggered pattern, with tight joints and in the some direction each time. On all slopes sod shall be installed from the bottom up and the newly laid sod should be protected by walking on boards as installer moves upward. On metal staples will be allowed. No sod of less than 18: in length will be allowed No sod of less than 18 in length will be allowed F. JOINTS.- Adjoin the section of sod firmly together. If air spaces occur between sections of sod they must be filled with sand or have the sod relaid. G. ROLLING: Roll sod with an adequately weighted roller to smooth out the sod bed. H. PROTECTION OF EDGES.- Regrade to protect the edges from dr)lng if mowing edge Is not used. 1. WATERING., After installation sod must be kept thoroughly watered to a depth of 6�. No foot traffic should be allowed for 2 or 3 weeks from the date of installation. J. INSPECTION BY SUPPLIER.- If there are any questions regarding the quality of sod installation a representative of the supplier shall be requested to inspect the installation and the Contractor called out by the suppliers representative. X11. SEED LAWN PLAN77NG (IF APPLICABLE): A. REFERENCE: Refer to paragraphs V, %4, W11, for rinish grading, weed control, and sod preparation. B. PREPARATION: Cultivate to a depth of 2" below finish grade, remove stones, foreign growth of any kind and extraneous matter, and grade to remove ridges and depressions so that areas after settlement will conform to the finish grade. Roll and rake lightly until the surface Is smooth, friable and of uniform tine texture. C. SOMNG: Sow lawn seed In the area designated on the drawings at the rate as designated on the planting notes. Sow the lawn in two directions. 0. TOP DRESSING: Rake lightly, spread 114" of Par -5 top dressing with a mechanical spreader, roll with 200 lb. roller and water with a fine sproy. Xill. HYDROSEEDING SPECIFICA77ONS (IF APPLICABLE): A. GENERAL- The hydro -mulch shall be applied in the form of a slurry consisting of wood cellulose fibre, seed, chemical additives, commercial fertilizer and water. Men hydraulically sprayed on the soil surface the hydromulching shall form a blotter like ground cover impregnated uniformly with seed and fertilizer and shall allow the absorption of moisture and rain fog to percolate to the underlying soil. hydro -mulch speciflcations may be superseded by the Horticultural soils test. 8. SEED MIXES: Seed mixes to be used on this project are designated on the plans and noted in the plant legend C. GUARANTEE.- The Landscape Contractor shall be responsible for the quality of all labor and materials as provided by subcontractors and suppliers, including seed mix, hydrosturry ingredlents and their application. 0. PRESOAKING SEED: Seed noted to be pre -socked shall be done so in clean potable water for twelve (12) consecutive hours prior to hydroseeding. After socking Is started, seed that drys out will be deemed unacceptable. E. PREPARA TION: 1. Ali hydroslurry mixes shall be mixed at the site under the observation of the Owner and Landscape Architect as it Is placed in the hjdroslurry tank. 2. Begin slurry preparation by adding water to the tank when the engine is at one-half throttle. Men the water level has reached the height of the agitator shaft and good recirculation has been established, add the fertHizer to the mixture (the tank shall be at least 113 filled with water at this time). 3. Open the engine throttle to full speed when the tank is 112 filled with water. Add all organic amendments, fiber, seedmix and chemicals by the time the tank is 213 to 314 full. 4. Start spraying immediately when the tank is full and the slurry is mixed. F. APPLICA TION. - 1. Apply the hydromulching in the form of a slurry consisting of organic soil amendments, commercial tertHizer, and other chemicals called for. Men hydraulically sprayed onto the soil, the mulch shall form a blotter like material. Direct the spray operation so that the slurry spray will also penetrate the soil surface as to drill and mix the slurry components into the soil, thus ensuring maximum impregnation and coverage. The impregnation and mixing of components will help in retaining moisture whHe stabdizing soil surface from supertIcial erosion. 2. Spray the area with a uniform visible coat using the dark color of cellulose fiber or organic amendment as a visible guide. The slurry shall be applied in a downward drilling motion via a fan stream nozzle. G. 77ME LIMIT: Ali hydroslurry mixture that has not been used within two (2) hours shall be disposed of off- site at the Contractor's expense. H. CLEAN-UP: Any slurry sprayed or spilled in an area other than that designated in the plans shall be cleaned up at the Contractor's expense. I. RESEEDING: All bare spots shall be reseeded by the Contractor within ten (10) days. The Contractor will be responsible for all reseed areas for as long after seeding as necessary until an acceptable stand of hydroseeded material Is realized and approved by the Owner. J. GERMINATION STAGE IRRIGATION.- Approximately twenty rive (25) hours after hydromulching the planting areas, initlate the watering sequence. The water should be left on long enough to moisten the soil thoroughly to the depth of the fiber, taking care not to super saturate or to wash the fiber or soil particles off the slopes. The Contractor will have to repair all seed washing or erosion at his own expense. The fiber and seed must be irrigated lightly and frequently to maintain optimum moisture content for maximum germination. At all times the irrigation system must be observed while in operation. Irrigation sequence must be determined by air temperature, prevailing wind velocity, soil texture, orientation and other logistical problems. It is imperative that the soil be kept moist at all times during the germination period. The light, frequent irrigation sequence should continue until the seedlings have grown beyond the germination stage. K. ESTABLISHMENT STATE IRRIGATION.- The irrigation sequence (frequency) shall be reduced while the duration of each watering cycle will be increased. A speciftc watering program shall be approved by the Owner and Landscape Architect but should approximate watering once a day through completion of the maintenance period L. HARDENING OFF STAGE IRRIGATION: At the end of the 90 - day establishment period, as determined by the Landscape Architect, reduce the watering frequency to once every three (3) days, while increasing the duration of the water suff1clently to allow for maximum water penetration for the expanding root system, while at the some time taking care not to cause erosion. The precise watering reduction program shall be determined by the Landscape Architect. XI V. SCOPE OF EROSION CONTROL WORK: A. EROSION CONTROL: Installation will be required in locations specifically delineated on the drawings or as necessary due to fleld conditions. 1. The surface of the slopes shall uniformly smooth and even with all debris and rocks raked out. The sod shall be sufficlently moist to permit the firm layfng of erosion control matting and to prevent sloughing of topsoil. 2. The erosion control matting shall be told with the direction of flow of surface drainage, and in accordance with the manufacturer's directions. The matting shall be cut to provide a visually pleasing slope. 3. The matting shall be stapled in place and firmly embedded by means of tamping or rolling, as approved by the Owner, to ensure that the matting Is in contact with the soil and that no erosion can take place under the matting. 4. Planting of turf, ground covers, shrubs andlor %dnes may be required in areas protected by erosion control matting as specified in the plans or as becomes necessary. XV. REPLACEMENTS: A. GENERAL- The Contractor shall immediately replace any and all plant materials which for any reason die or are damaged while under his care. Replacements shall be made with plants of like kind and size in the same manner as speciffed for the original planting. XW. CLEAN-UP A. GENERAL- After ag installation operations have been completed remove all trash, excess soil, empty plant containers and rubbish from the property. Ali scars, ruts or other marks in the area caused by this work shall be repaired and the ground left in a neat and orderly condition throughout the site. Contractor shall pick up all trash resulting from this work no less than each Friday before leaving the site, once a week andlor the last working day each week. All trash shall be removed completely from the site. B. TOP SOIL Excess topsod shall be removed from the site. C. NEATNESS.- Leave the sidewalks and streets in a neat and clean condition at the end of the day. 0. REMOVAL OF TAGS. Remove all tags, labels, nursery stakes and ties from all plants unless otherwise directed, only at the end of all installations. XWI. PROTECTION: A. GENERAL- At all times during construction, adequate protection shall be provided for all planted areas against damage of any kind, until final acceptance by the Landscape Architect. B. RESPONSIBILITY: The Contractor shall be held responsible for the care and preservation of all existing buildings and structures on the property and adjacent premises. Any part of them injured, damaged or disturbed because of his work shall be repaired, replaced or cleaned by him at his expense. XWI1. GUARANTEE: A. SHRUBS.- All shrubs shall be guaranteed as to growth and health for a period of ninety days after completion of the specifled maintenance period andlor final acceptance by the Owner. 8. TREES.- Trees shall be guaranteed to live and grow in acceptable upright position for one year after the specifled maintenance period andlor final acceptance by the Owner. The owner must provide adequate maintenance to insure the extended guarantee on trees. C. DEFINITION OF DEATH: Plants which dle or lose more than 30% of their original leaves shall be replaced D. REPLACEMENT: The Contractor within seven (7) days of written notiflcatlon by the Owner shall remove and replace all guaranteed plant materials which, for any reason, fail to meet the requirements of this guarantee. Replacement shall be made with plant materials as indicated or specifled for the first planting and all such replacement materials shall be guaranteed as speciffed for the original guaranteed material. XIX. MAINTENANCE A. MAINTENANCE PERIOD: The maintenance period shall commence upon the Owner's written approval of all phases of planting Installation and shall be for the following period. 90 DAYS. B. GENERAL: The general care and maintenance of all areas shall consist of proper watering, fertilization, weeding, clean-up to maintain all plants and turf in a healthy, growing condition and as noted below. C. GROUND COVER: Ground cover from flats -areas without overseed - apply a pre -emergent herbicide in accordance with the manufacturer's printed instructions. 0. FERTILIZATION.- Maintenance work shall Include fertHization with a commercial fertilizer at 30 day intervals as noted herein. The fertilizer may be superseded by the soils report and shall be approved by the Landscape Architect. E. WEEDING.- Any concentrated development of weed growth that may appear in planting areas during the maintenance period shall be removed at 10 day intervals. The Contractor shall remove such concentrations of weeds manually. F. GROUND COVER AREAS. Cultivate all non-hydroseeded ground cover areas at not more than 10 day intervals. G. SHRUBS AND TREES: All shrubs shall be pinch -pruned as necessary to encourage new growth. Dead, w9ted flowers and dead foliage shall be continuously removed No pruning shall be done to shrubs or trees without the approval and under the direction of the Landscape Architect. Ali wounds over 1-112 inches in diameter shall be sealed with an approved tree seal. H. TURF AREAS: Edge and mow to a height of 2 inches whenever the turf reaches a height of 3 inches. Gross clippings shall be removed off-site. I. SUBSURFACE DRAINS. Ali subsurface area drains shall be periodically flushed with clear water to avoid build-up of silt and debris. Keep all drain inlets clear of leaves, trash and other debris. J. PROTECTION.- During the maintenance period, the Contractor shall be responsible for maintaining adequate protection of all planting areas. Any damaged areas shall be repaired at the Contractors expense. K. RE-HYDROSEEDING: The Contractor shall re-hydroseed all hydroseed areas eroded or non -germinating at the end of each 30 days of maintenance. L. IRRIGATION.- All irrigation must be operating properly and adjisted properly for efficient coverage and minimum oversproy at the end of the maintenance period M. FINAL ACCEPTANCE: Will be given at the end of the maintenance period for all planted areas once hydroseed germination and plant establishment has been obtained and there are no barren areas larger than 3' x 3" * All plants must be in a healthy, growing condition as approved by the Landscape Architect and Owner. N. CONDITION OF SITE: During the maintenance period, keep the project neat and free from debris at all times. Obtain the Owner's approval for onsite storage of equipment or maintenance materials. XX FINAL CONSTRUCTION INSPECT70N AND FINAL MAINTENANCE INSPECTION. A. FINAL CONSTRUC77ON INSPECTION: Men all landscape improvements have been installed in accordance with the plans and speciffcations the Contractor shall notify the Landscape Architect and request a 'Final Construction' inspection. If the Landscape Architect determines the work to be substantially complete and in conformance with plans and speciftcations, the Contractor will be advised that the basic maintenance period is started 1. In order to be substantially complete, at least the following must have been finished: a. Ali fine grading, including elimination of low points that hold runoff. b. A complete and operable irrigation system. C. Installation of all plant materials. d Seeding of all seeded areas. 2. Minor pick-up items may be completed during the basic maintenance period such as: 0. Resodding of bare spots in town. b. Replacement of damages or non -conforming plant material. 0. Re -staking or tying of trees. d Lowering of sprinkler heads to grade after turf has established f Replacement of unauthorized substitutions. 9. FINAL MAINTENANCE INSPECTION.- At the end of maintenance period and when ground covers and turf have established and all pick-up items have been completed, the Contractor shall request a Anal maintenance inspection. The Contractor wig be advised by the Landscape Architect at the final inspection that work is or is not satisfactory. 1. If the work is satisfactory, the basic maintenance period will end on the date of the rinal inspection. 2. If the work Is unsatisfactory the basic maintenance period will continue at no additional expense to the Owner until the work has been completed, inspected and approved by the Landscape Architect. C. FAILURE TO PASS INSPECTION: If work fails to pass final inspection, any subsequent inspections must be rescheduled as per above, and will be charged to the Contractor at the prevailing hourly rate of the Landscape Architect.