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HomeMy WebLinkAboutCT 75-07; GREEN VALLEY KNOLLS; LANDSCAPE SPECIFICATIONS; 1976-03-05.. .. .., • SPECIFICATIONS FOR GREEN VALLEY KNOLLS FOR LaCosta Land Company 2100 Costa Del Mar Road Carlsbad, California 92008 VAN DYKE & ASSOCIATES, INC. 11722 Sorrento Valley Road, Suit.e E San Diego, California 92121 Li~\i\iiJSCAPE DESIGN APPROVED PARKS & REC. DEPT. DATE 4-1-76 I Job #231-75 March 5, 1976 .. SECTION A SECTION B SECTION C SECTION D SECTION E INDEX GENERAL CONDITIONS SLOPE PREPARATION, STABILIZATION & WEED ERADICATION IRRIGATION INSTALLATION PLANT INSTALLATION MAINTENANCE PERIOD & PROCEDURE j' SLOPE PREPARATION, STABILIZATION AND WEED ERADICATION (Section B) SCOPE The Contractor shall furnish all labor, materials, equipment and .transportation to plant by hydro-mulching all slope and pad areas as designated on the plans and describe_d herein. Included as a part of the work of this Section, but not necessarily limited by it are the following items: A. Following the installation of the trickle irrigation system · :prepare those areas designated for hydro-mulching by follow- ing all Weed Eradication Procedures. B. Following the Weed. Eradication Program add soil amendments at the following rates -50# / 1000 S. F. hydrated lime by hand broadcasting when wind will not interfer with the oper- ation. Water thoroughly -re-apply as necessary to raise Ph to min. 5. 5. C. Following the installation of all one (1) gallon trees and shrubs, hydro-mulch all areas designated or.i. the plans to receive hydro- seec;l. • D. Re'."'seed areas of non-germination and erosion at regular intervals as specified. '{ E. Water and fertilize planting areas during maintenance period as specified herein. F. Acceptance of six month maintenance on all planting areas as design- ated on the_ plans, sha,11 ~e by the LandscapeArchite_ct and Owner. II. GENERAL INFORMATION III. A. Definition of Terms: "Planting Area'1 refers to all areas as designated on the plans to be planted by _hydro-mulching shrubs. SITE INSPECTION, QUALITY OF WORK AND VERIFICATION OF DIMENSIONS A. Before proceeding with any work, the Contractor shall carefully check and verify all dimensions and planting area conditions and shall immediately inform, -the Landscape Architect of any discrepancy between the Drawings and/or Spec_ifications and actual conditions. No work shall be done in any area where there is such a discrepancy or where conditions are unsuitable ior _successful plant material establishment until approval for same has been given by the Landscape Architect in writing. B. Quality of Work: The hydro-seeding work shall be performed in accordance with the best standards of practice relating to the trade and under the continuous supervision of a competent loremen cap~ble of interp,reting the Plans and Specifications. C. Inspection of Conditions: The Contractor shall examine related work and surfaces before proceeding with any work of this Section and inform the Lands cape Architect, in writing, of conditions which will prevent the proper execution of this work. Failure to report unsuitable conditions to the Landscape Architect .constitutes acceptance of performing all work caused by the un- ·suitable conditions as part of this section without additional cost. J.V. WEED ERADICATION PROCEDURES .All planting areas as designated on the plans to be hydro-mulched .shall receive the following Weed Eradication Procedures prior to hydro-mlilch seeding: A. Manually-remove all existi~g vegetation and dispose of it off- site. B. Fertilize all planting areas with a balanced commercial .fertilizer such as 10-10-10 at the rate of three hundred (300) Ibs. per acre and begin watering process. C. Water all planting areas thoroughly-and continuously-for a period of two (2) weeks. A shorter watering period may be permissable at the discretio·n of the Landscape Architect if he so determines that weed seed germination is sufficient for an effective kill . . D. D~scontinue watering process for two (2) days and then apply 'Broadside' contact weed killer as manufactured by the Ansul Co. at maximu:µi label rates. The Contractor shall apply the above agent to a planting area of approximately 1,000 sq. ft. and then evaluate effective coverage of weed species involved. The Contractor shall make application .adjustment such as the inclusion of additional spreading agent or spraying techniques in order to maximize effective use of the contact weed killer as specified above. Allow a minimum of -four (4) days without irrigation for effective weed kill. E. Water all planting areas thoroughly-and continuosly-for three (3) consecutive days to saturate upper layers of soil. F. Allow planting area surface to dry for two (2) consecutive days without the application of irrigation or natural water. ' G. Following the installation of all one (1) gallon trees and shrubs hydro-mulch all areas designated on the plans_ and begin six .m,onth maintenance period. V. PLANTING -HYDRO-MULCH MATERIALS --A. Hydro-mulch all planting areas as specified herein. Hydro- :mulch mix shall consist of the following components on a per acre basis: 2000 1000 1000 150 30 #/acre Cellulose Paper Fiber #/acre 11 Earthmaster 3-3-311 #/acre 11Earthmaster11 castings # I acre Calcium Nitrate Gals. /acre 11HL-80 ~umectant11 Vl. PLANTING -SEEDMIX The appropriate seedmix as listed under seedmix specifications below .and the appropriate water volume shall be mixed in the hydro-seeding machine with each of these components to allow for a homogeneous slurry which is thoroughly mixed and can be applied easily without clogging the hydro-mulching machine. A. Hydro-Seed Mix 11 LaCosta Knolls #6411 (Pecoif Brothers Nursery) Species # ;eer acre Eriophyllum confertifloru;m 5 California Poppy 6 Cistus corsicus 8 Mimulus puniceus 2 Eriogonum fasciculatum 30 Coreopsis maritima 2 Rhus integrifolia 5 Eucalyptus cladocalyx 6 Total #/acre 64 VII. PLANTING -HYDRO-MULCH APPLICATION AND PLANTING SCHEDULE The hydro-mulching shall be applied in the form consisting of cellulose fiber, the designated seedmixes, commercial fertilizers, humectant and -water~ When hydraulically sprayed on the soil surface, the hydro-mulch- ing shall form a blotter like matting of ground cover impregnated uni-. . formly with seed, fertilizer, and soil stabilizing chemical. The blotter like matting cover of hy.dro-mulching material approximately 1/211 thick must allow for the absorption of moisture via an irrigation system or natural rainfall and also allow for maximum circulation and air exchange to the underlying soil. A. Equipment: Hydro-mulch equipment should be as produced by local manufactures but should meet the minimum requirements. The slurry distribution lines should be large enough to prevent stoppage and shall be equippe_d with a set of hydraulic discharge. The slurry tank shall have a minimum capacity of 1, 500 gallons .-and shall be mounted on a traveling unit either self-propelled or --=drawn by a separate unit . . .B. Preparation: Prior to hydro-mulching planting areas, the Contractor .shall follow the Weed Eradication Procedures as specified in Section IV of these Specifications. C. Application: The operator shall spray the slopes with a uniform ,visible coat by using a green color in the cellulose fiber mulch as a visual guide. The slurry sh~ll be applied in a sweeping .motion, in an arch stream so as to fall like rain allowing the ·fibers to build on each other until a good coat 1/211 thick is achieved and the material is spread at the required rate per -acre. The hydro-mulch applicati~:>n contractor shall be approved .by the Landscape Architect. • D. Time Limit•: The Contractor shall add 50% more of. the original specified seed mix to any slurry mixture which has not been applied within four (4) hours after mixing. The Contractor shall further add 75% more of the original specified seed mix to any slurry mixture which has not been applied within six (6) hours after mixing. Any slurry mixture which has not been applied within eight (8) Hours after mixing shall be rejected and disposed of off site at the Contractor's Expense. E. Protection: Special care shall be exercised by-the Contra~tor to prevent any of the slurry from being sprayed outside limits of planting as designated on the plans. Any slurry spilled in restricted areas shall be cleaned up at the Contractor's expense. IRRIGATION INSTALLATION (Section C) All work in this Section shall be subject to the General Conditions as if Incorporated herein. I. SCOPE The Contractor is to furnish alf labor materials, equipment and ,supervision necessary to complete an operable irrigation system. Baid syst.em to be in place with all heads and valves adjusted and ready to. operate as indicated or implied by the drawings and speci- fications contained herein. II.· GENERAL INFORMATION Before starting any work, the Contractor will examine the job site, locate all existing utilities, check all grades, and decide if the ·work may proceed in an orderly_ and efficient manner. ID. MATERIALS All materials shall be as specified on the drawings that accompany these specifications. Any deviations from said specified materials shall be approved by the Landscape Architect in writing prior to any installation. •• All materials shall be received on the job site in a new and unused condition. No ma.terials that have been used prior for any reason will be .. permitted for the construction of the irrigation system. All pipe ·shall be received on the job site in a bundled condition taped at each end and at the center of the bundle. All fittings shall be boxed and marked by the factory as to their size and type. A. PIPE: 1. All pressure P. V. C. supply lines shall be Class 315 or schedule 4!) P. V. C. pipe 112/1220. -' 2. Non-pressure lines and fittings. a. Pipe shall be Class 200 Polyvinyl Chl9ride Pipe 1120/ 1220. Lasco or equal. b. Fittings shall be standard weight Schedule 40 Polyvinyl Chloride Type 11. c. Solvent fusion welding compound for pipe shall be as recomm.ended by the manufacturer for pipe and fittings. d. Plastic pipe shall be extruded from 100% Virgin Poly- ·vinyl Chloride (P. V. C.) per ASTM specification .D-1784-60-T as manufactured by Lasco-Industries., Kraloy, or approved equal. e. Plastic pipe shall be inspected and tested by the manu- facturer. f. Plastic pipe shall be continuously and permanently marked with the following information: Manufacturer's name, nominal pipe size., pipe schedule and/or class and P. V. C. 1120/1220. g. The manufacturer shall also mark the date of extrusion on the pipe. This dating is to be done in conjunction with records to be held by the Manufacturer for two years., covering quality control test, raw material batch number., and other information deemed necessary by the manufacturer. 3. Poly Drip Hose. a. Shall be11 Drip-eze11 size shall be DH. 580 (. 580 I~ D.) b. Shall be manufactured from virgin material of a high grade compound of polyethylene. 4. Bi-Wall Tubing. Bi-wall tubing shall be 11Anjac Bi-Wall Lay Flat" 18 mil thickness (Type B ). Orifice spacing shall be 1211 o. c. 5. All fittings for ·bi-wall and poly drip hose shall be. as specified by manufacturer. B. VALVES: J. Manual C.ontrol Valves .• a. Valves shall be constructed of all brass, equipped with replaceable· rubber discs and brass cross handle. b. Valve shall operate safely up to 200 PSI. (Note: All valves a"nd sizes shall be as indicated on the drawings or approved equal.) c. Champion 466 Anti-Syphon Valve. 2. Gate Valves for Flo-Control. a. Gate valves shall be all bronze with a non-rising stem, brass hand wheels and threaded type joints as manu-· factured by Crane, Kenne_dy, or Stockham or approved equal. 3. Quick Coupling Valves . . a. All quick coupling valves shall be11 Rainbird1#44·or approved equal, unless otherwise indicated on the drawings. 4. Pressure Reducing Valve -at P.O. C. 1 a. Shall be Wilkens 500 or equal. b. Shall be set at 70 psi. c. Fertilizer applicator shall Drip-eze #DA-005 d. Filter units. 1. Drip-Eze #DF-005 2. Plastic construction with disposable elements. 3. 10 gpm capacity (each filter) e. Pressure regulator. 1. Shall be Drip-eze #D706 2. Diaphragm type pressure regulation 3. On-off feature pressure reading Fbrt-Contractor to supply. £. Automatic Controllers. 1. Battery operated. 2. 'Cloud 9' #Cl000 1 A. C. -1 for each manual control valve. IV. ·INSTALLATION PROCEDURES A. PIPE. 1. All pres sure lines shall be installed prior to the installation of any lateral lines except when it is necessary to run lines under walks and A. C. paving prior to the normal sequence of work. 2. All pipe installation ·shall be performed as per the manu- facturer's recommendations. 3. All changes in direction of pipe shall be made with fittings; not by bending. 4. All above grou.nd slope supply lines to be attached to the slope by use of #3 rebar stake with wire maximum ten (10) feet on center. 5. Poly Drip Hose. a. Storage and Handling Poly Drip Hose is furnished in flexible coils and may be stored either flat or on edge. • Coils may be stacked upon each other when stored flat. Avoid storage on rocks or other sharp surfaces. t b. Installation· Emitter lines are no:v-mally pre-assembled at the factory and coiled. Coils of Poly Drip Hose should be carried over rough g.rou.p.d, not dragged, from point of storage to point of use. Coils should be unrolled in a manner to minimize stresses and prevent kinking. This is normally accomplished by carrying the coil and playing out one loop at a time. In no case should hose be subjected to reverse curvature because of the tendency ~o increase kinking. If kinks do occur, they should be. cut out and the hose spliced. 6. Bi-Wall Tubing. a. Install with orifices pointing in up position. Tube spacing down face of slope shall be graduated from 2' at top of slope to 31 in center to maximum of 4 1 at base of _slope. Tubing shall be staked at 5'. o. c. maximum by looping cut ends of bi-wall material around bi-wall tube c1nd secure by nailing to slope. b. When installing barbed fittings onto polyethylene hose, immerse the hose ends approximately 111 onto 150° water to soften the hose for insertion ·of the fitting. c. Where it is necessary to make "cold connections, use the LOC-EZE type fittings. d. Do not use detergents or lubricants in assembly as they may cause accelerated deterioration of the hose. e. Maintain water pressure· within limits of lateral drip lines. £. Avoid kinking emitter ~upply lines. I£ this should occur, straighten to original roundness, or cut out kinks and insert co-q.pling. g. Make all hose cuts squarely with a sharp knife or curved- bladed shears. h. During installation, dirt or other contaminants should be kept out of emission lines by placing tape over open ends which are not immediately· secured. This avoids conta- minants which could cause clogging. i. Where excessive elevation changes occur, insure con- sistency of application rates with pressure compensating emitters, pressure regulators or vari ... flow valves. j. Avoid excessive pressure line drop due to use of oyer- extended lengths. k. Fiush supply,lin.es before connecting clean .emitter or Bi-Wall lines. 7. Pressure Line Trenching. a. All pressure lines shall be trenched to a minimum depth of 14" and a maximum depth of 2.411 • b. All trenching shall be uniform with vertical walls and squared b_ottoms. c. All trenches shall be a minimum width no smaller than 4 times the diameter of the pipe to be used! 8. Pressure Line Trench Backfilling. a. In no event shall the Contractor cover up or otherwise remove from view an·y work under this contract with- • out prior approval of the Owner's representative. Any work covered prior to inspection shall be opened to view by the Contractor at his expense. b. Trenches shall be backfilled with excavated earth after all clods, rocks or large lumps have been removed or broken up with initial backfill over plastic pipe being of a fine granular material with no foreign matter Jarger than one-half (1/2rr) inch in size. Backfill shall be placed in layers. Each layer shall be mois- tened and compacted to a·density not less than that of .the adjacent soil. c. Backfill material shall be approved soil. Unsuitable material, including clods and rocks over 2-1 /211 in size, shall be removed from the premises and dis- posed of legally at no cost to the Owner. 9. Valve Box. a. Ametek Jumbo Box 1811 X 2411 #10-190-001. t b. Shall enclose fertilizer applicator, filter units, pres sure regulator and control valve. 10. Gravel Sumps. a. Shall be located under each valve box. b. Minimum of_l_cubic feet of pea gravel. B. VALVE INSTALLATION: All valves to be _installed and as per plans (schematic diagram) and in accordance with manufacturers recommendations. C. FILTER UNIT. 1!' Maintenance The pressure drop across the filter is approxifil:ately-2 psi with clean filter elements. When the pressure drop increases to 10 to 15 psi, the filter ele_ments should be cleaned and re-installed in the filter body-.· The pressure differential build-up is geometic, i.e. once it starts to increase, it builds up at an increasing rate. The pressure differential -should be checked at the start of each irrigation. If in doubt, clean the filter elements. A regular cleaning schedule will --soon be developed. D. AUTOMATIC CONTROLLERS: 1. To be installed as part of manual control valves. -E. PRESSURE TEST: 1. Prior to any-testing all lines shall be flushed clean of .any-deris by-a continuous flush~ng of a minimum of 20 seconds. 2. All pressure lines shall be tested under hydrostatic pressure of 125 pounds per square inch and be proven watertight. Contractor shall provide all equipment for hydrostatic tests. 3. Pressure shall be sustained in the lines for not less than four hours. If leaks develop, the· joints shall be replaced and the test repeated until the entire system is proved watertight. 4. Tests shall be observed and approved by-the Owner's representative prior to backfill. F. COVERAGE TESTS: 1. When the sprinkler system is completed, the Contractor shall perform, in the presence of the Lan:dscape Architect, a coverage test to determine if the coverage of W9-ter affords . the lawn and planting areas is complete and adequate. The . Contractor shall furnish all materials and perform all work -required to correct any-inadequacies of coverage disclosed. Any-deviation from the plans must have the approval of the Landscape Architect. Such approval does not exonerate the Contractor from accomplishing complete water coverage. G. FINAL ACCEPTANCE: 1. At the end of the maintenance period, the Contractor shall call for a final inspection. in writing at least 36 hours prior. H. COMPLETION: 1. The work shall be accepted in writing when the project has been completed satisfactorily to the Owner. In judging the work, no allowance for deviation from the original -plans and specifications will be made unless already approved in writing at proper times. 2. Should it become necessary, due to developed conditions, to occupy the premises before contract if fully completed such occupancy ehall not constitute acceptance. I. GUARANTEE: 1. The entire sprinkler system shall be guaranteed by the Contractor as to material and workmanship, including settling of backfilled areas below grade for a period of .one year following the date of final acceptance of the work. 2. Should any operational difficulties in conriection with the sprinkler system develop within the specified guarantee period which, in t~e opinion of the Owner may be due to inferior material and_/or workmanship, said difficulties shall be immediately corrected by the Contractor to the satisfaction of the Owner at no additional cost to the Owner. .. 'PLANT INSTALLATION (Section D) • All work in this Section shall be subject to the Ge0neral Conditions as if incorporated herein. I. SCOPE ~ A. The Contractor shall furnish all labor, materials and equipment necessary to complete the work specified here'in and in conjunc- tion with the working drawings. Work in this section shall be .-scheduled as per unit price or lump sum list accompanying the bid docun1ents. II. SPECIFIC REQUIREMENTS A. The term "Planting Area" shall mean all areas to be planted, mulched, and/ or sown with trees, shrubs, ground cover and • . seeds. B. Location of all pla~ts shown on scal~d draw~ngs are approximate and genera~. Prior to commen.'cement of plant installation the Contractor shall carefully check and verify all plant locations,. grade elevations and:quantities with the ~andscape Architect. The Contractor shall also notify the Archite_ct as to any gross descrepancies. • .. t- C. The selection of plant materfal and method of planting shall be • su~ject to Landscape Architec_:t' s approval. D. At such times when in~ le:i:nent weather persist, eg .. severe heat, gusty winds, abnorma'l moisture, etc., hindering satisfactory results, all work shall be ceased and shall resume only when the Landscape Architect determines a f~vorable condition exists. E. Once plant materials have reached the site it is the Contractor's responsibilities to properly care for and maintain them until the. termination of the maintenance period, or job acceptance if no maintenance exists. (See maintenance Section E) III. MATERIALS OTHER THAN PLANTS A. Tree Stakes -shall be construction grade, all hear~ redwood stakes, free from knots and breaks.; _pointed at one end. Stakes shall be of sb:es indicated on drawings. Size to be 111 x l'.' x 61 -1 gal. site only. . . ... PLANT INSTALLATION (Contin1ied) B. Tree Ties -shall be flexible, bla.ck color, non-_deteriorating, ·self-fastening,· 1/21' diameter, 1/16" thick vinyl tree ties, ".-minimum lengths shall be 2411 • IV. PLANT MATERIALS ·c-A. Nomenclature -The names of plants shown on the plans conform with the approved names give,, in ·"A Checklist of Woody Ornamen- tal Plants of California" published by the University of California, Manual 32, (1963). • · .. B. The quality and size of all plant material shall conform to the sCalifornia State Department of Agriculture's Regulation for Nursery Inspections of Rules· and Grading. Plants shall exhibit · normal growth habits, being sound, healthy, victorous, and free . from any insects, insect eggs or lar.vae, diseases, infestations, .salt burns or sun scalds, wind burns, damaged bark, or any·: gros~ disfigurements. All plants with· trunks not sufficient in size to adequately support themselves wh~n planted in an open area shall be replaced with plant material meeting the require- ments set. forth herein. All plants shall have ~~11-developed, fiberous root system.. and shall not be container bound, nor shall roots be protruding from the ·container. All plants shall exhibit ··healthy sound foliage throughout. Minimum acceptable sizes of .all·plants shall conform to the ·dimensions set forth in the list of plants to be furnished. C. The Contractor shall furnish to th~ Landscape Architect a copy of all invoices, stating the amount, size and quality of plant material to be installed. The invoices shall have been stamped with the state and/ or federal agriculturc3:l seal of acceptable nursery stock. · .D. All plant material must be delivered to the site five (5) working -days prior to installation. Specimen plant material shall be ex- •c:luq.ed. The metho'd of shipment and date of deli.very shall be ·given in writing to the Landscape Architect by ·the Contractor. • Extreme care shall be taken by the Contractor to ensure safe and proper handling from the _origin to the in-place location. r v. • 0 PLANT INSTALLATION (Continued) PLANT INSTALLATION -A• Locating Plant Material .:.. The spotting of all planting and areas for ground cover shall be approved on the site by the Landscape Architect. The Contractor shall set all plant material in the general location as specified on the plans. All locations shall be checked for possible interference with existing underground ,improvements, prior to excavation of plant holes. If inter- .Ierence is pre-determined, other locations shall be selected :by the Landscape Architect. Damage to underground utilities -shall be the Contractors responsibility and shall be repaired _at no extra cost to the owner. B. Plant Hole Excavation .1. All holes to be excavated shall have roughened, v~rtical sides with minimum sizes as indicated on the detail drawings . . 2. Excess topsoil generated from the planting holes shall be spread over the site at the direction of the Landscape Architect. 3. Rock, debris and excess subsoil excavated from the plant hole shall be removed from the sit.e. :r C. All cans shall be cut vertically oil opposite sides with approved "can cutters." Used· cans shall be removed from the site daily. D. No plant shall be installed if the root ball is broken, damaged or container bound whether before or after ·installation. E. Setting of Plants 1. The plartt shall be placed on top of preplaced backfill material which has been handtamped and water settled to the base level of the ro·otball.- 2. The plant shall be "faced" so as to display the majority of its foliage to the angle of most frequent viewing. 3. The plant shall be positioned in the center of the hole and held verticle and level until planting backfill material has been properly· tamped. " --4. All plants shall be set level after settling to the adjacent .finish grade and shall not deviate from the level established in the container. F. Plant tablets shall be placed in each plant hole 4 inches below finish grade at the following rates: 1-21 gram tablet per 1 gallon container Planting Tables -Shall be tightly compressed chip type com- mercial grade planting tablets, of varying sizes, with a guaranteed analysis of 20-10-5. Planting tablets to be Agriform Planting .tablets or equal. G. All plants shall be watered in no longer than· 30 minutes after they have been installed. Water penetration shall ·coincide -:with the depth of the hole being watered • . H. Planting Backfill -Shall consist of a thoroughly blended mixture of excavated soil from the planting pits and soil conditioner at th~ following proportions. Soil Conditioner Excavated Soil 1 par.t 2 parts When backfill is complete, a shallow water basin shall be formed around each tree and shrub by mounding soil around the plant. pits; (See ·detail drawing). The basins shall be removed prior to final acceptance of the work unless otherwise required or requested by Owner or Landscape Architect. I. Staking -All trees ~esignated on the drawings to be staked shall be staked with one wood stake, driven into the ground -on the windward side of the tree. The stakes shall be driven in.plumb and secure. Special·care shall be taken not to damage the tree roots or root ball during stake installation. Tree ties shall be fastened to each tree and stake by looping figure 81 s with the inside diameter of the tie to the stake. (See detail drawing) . . J. Drainage of Pits -The Contractor shall be responsible for all surface and subsurface drainage required, which may affect his guarantee of the trees, shrubs and ground covers. K. Pruning after Planting--Shall be required on all trees, shrubs and vines when necessary, in the opinion of the Landscape Architect to provide the specified or approved standard shapes, .form and/or size characteristic to each plant. Pruning may include thinning, topping, and/or cutting and shall be under the direction of the Landsca.pe Architect. Cuts over 3/4" in diameter shall be painted with an approved tree sealant. .. . . . . . . MAINTENANCE PERIOD AND .PROCEDURES (Section E) I. .PLANT MATERIAL AND IRRIGATION A. The Contract Maintenance Period begins on the first day after all work on this project is complete, checked, accepted and written approval from the Landscape Archi- tect is given to begin the maintenance period, and shall con- ti~ue thereafter for no less than 6· months. B·. Any day upon which no work will be required, as determined by the Landscape Architect, will be credited as one day of maintenance period, regardless of whether or not the Contract- . or performs any maintenance work. ·c. Any day when the Contractor fails to adequately ma~:atain the wor.k, replace unsuitable plants, irrigate, or control weeds • or other needed work, as determined necessary by the Land-'. scape.Architect, will not be credited as one of the Maintenance Period Days. f D. . The Contractor shall contim;i.ous ly maintain all involved land- scape area:: of the projec't including planting, irrigation an<l: other related improvements d,uring the progress of the work arid during the Contract Maintenance Period, until the final acceptanc~ of the wor,k by Landscape Architect. • E. -Regular maintenance operations shall begin immediately after _each plant is planted. Plants shall be kept in a healthy, grow- ing condition and in a visually pleas mg appearance by watering, pr1:JI1ing, trimming, restaking, pest and disease controlling, spraying, clean-up and any other necessary operation of main- tenance. All plants found to be dead or in an impair~d condition .. shall be .replaced immediately. • F. All landscape areas shall be kept free of weeds·, noxious grass, and all other undesired vegative growth and debris . • G. The Contractor shall be responsible for maintaining adequate protection of the areas. Damaged areas shall be repaired immediately at the Contractor 1 :3 expense. H. The Contractor shall provide "qualified" maintenance personnel .to maintain all involved areas of the project. The crew shall be o.£ sufficient size to adequately maintain the project work at all times. I. During the maintenance period, plants which die or which in the opinion of the Landscape Architect are in an unhealthy or impaired condition, shall be replaced by the Contractor within five (5) days after the unsatisfactory condition is evident. However, no replace- ·_ ment plantings shall be made in any conditions definitely unfavor- able for planting. II. MAINTENANCE OF HYDRO-MULCHING A. Maintenance and Irrigation: Maintenance shall be the respon- sibility of the Contractor. -It is his responsibility to provide sufficient water and full coverage irrigation system. Moisture must be maintained on the soil surfs1,ce at all times. Once the slurry mulch has been applied and allowed to set for one day,· the 'slopes ·can then be irrigated. There i_s no set irrigation requirements in gallons per minute; dura_tion of time and number of gallons to be applied to the slopes will vary from day to day and system to system depending on the rate of growth, and climatic conditions ~ncuuntered. As a rule of thumb, the soil surface must be kept moist at all times, particularly during the seedling germination period, otherwise the seedlings will die .from desication. B. The Contra·ctor shall be .responsible for establishing the proper fertilizing program based on soil test after installation of hydro-seed. Contractor shall furnish a maintenal'l:ce program, listing the materials and rates of application based on soil tests, to the Landscape ,1 Architect and the Owner. ··0:1 III. CLEAN-UP OF PREMISES A. The Contractor shall keep the premises free from accumulations of waste materials -and debris. Upon completio.11 of the project, he shall remove all waste and surplus materials from the site and shall broom clean and wash down all paving and walks within the contract area, leaving t.q.e premises in a clean condition. .. ., V. GUARANTEES AND REPLACEMENTS A. All trees, ins_talled under ~he Contract, shall be guaranteed to live and grow for a period of one year from the date of final acceptance of the Contract work • B. Trees found to be dead or in poor condition within the guarantee period shall be replaced within fifteen (15) days of written notifi- cation by the Landscape Architect. 1. Replacements shall be made to the same specifications !equired for the original plantings. 2. Material and labor involved in replacing materials and repairing all damages made to existing improvements during the replacement operations shall be supplied by the Contractor at no additional expense to the Owner. C. All plant materials are guaranteed to be of the species, variety flower color and size indicated on the drawing. D. Minimum Coverage -Final acceptance will be given at the end of six month maintenance once 98% germination and plant establishment has been obtained. Acceptance will be given in writing by the Landscape Architect following a final acceptance inspection. The Landscape Architect reserve~ the option to extend the maintenance if he deter- mines 98% coverage that is required by contract .