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HomeMy WebLinkAboutCDP 2017-0032; FARADAY AVENUE SLOPE REPAIR; Administrative Determination.. ------'GENERAL REVEGETATION NOTES:, ._,1.The Revegetation Area shall be monitored for a 5-year period following acceptance of installation (or until success ‘..N . , / LEGEND iniRevegetation Area ' •._;Proposed Coastal Sage Scrub Revegetation (0.053 ac).- criteria are met). 2.Revegetation of the slope shall be accomplished in a manner so as to provide visual and horticultural compatibilityo1020.. - - -. .- ' %_v -..."'-with the indigenous native plant materials surrounding the site.--,. FEET i /ri 1 --.- ".„..,"-- 'V ( &\C„.../'-t'------i i''--.-..---- ...---.,. ,.. .. ".'-3.Invasive plant species, including, but not limited to, those listed in the California Invasive Plant Council's (Cal-IPC) .,...Invasive Plant Inventory, are prohibited and shall be eradicated and removed by the Contractor. Native plant species shall be used in naturalized areas. ,/.7''4.All required revegetation and erosion control shall be completed within 30 calendar days of the completion ofrfgrading or disturbance in order to start the 120-day Warranty Period, or as recommended the Project Biologist.... --- . __, 5.Contractor shall correct all soil erosion, and shall repair and/or replace all aboveground erosion control Best .Management Practices (BMPs) implements damaged during the 120-day Warranty Period and throughout the 5-year -r ':I:,..,,-.-----*-.--_,„.•maintenance and monitoring period. Any aboveground erosion control measures such as,but not limited to, silt .•-encing, gravel bags, fiber rolls and/or hay bales shall be removed by the Contractor following acceptance of the 5- year maintenance and monitoring period by the Project Biologist. All hay/straw products shall be un-decaying, clean _,.,.• '.----;'(.-''X.'--- .--and free of weeds, seeds, and debris.., ,.------,•grange construction fencing shall be installed and maintained by the Contractor prior to slope repair activities and is •-•-----..- ,--:/-emain erect through the 120-day Warranty Period and until the end of the 5-year maintenance and monitoringft- .. - .1}' 't7 'dr; ••(or until success criteria are met). Following acceptance of the 5-year maintenance and monitoring period by the '•ct Biologist and City Staff, the Contractor shall remove all orange fencing.,-,mss_._—____ •- .2.'7.Contractor shall remove all trash and/or debris from the Revegetation Area prior to and following the revegetation,.„.•.•___ .•.--- .„.•••••'',,,",------,..installation, and until the end of the 5-year maintenance and monitoring period. .- _,,-,.--Temporary Irrigation .-.--V 1.The Contractor may choose the temporary irrigation method. The temporary irrigation method must be accepted by ....---the Project Biologist and City Staff. 2.Temporary irrigation shall be provided by the Contractor for a period sufficient to establish plant material and to.,...- P`Nie provide vegetative cover that prevents soil erosion.01 --- Coastal Sage Scrub/Erosion Control Seed Mix *34(3 /3.Irrigation shall be performed in a manner that avoids runoff, seepage, and overspray onto adjacent properties, non- .Scientific Name Common Name Li""edf"re Live Percent Pounds per Pound ,iic=imi Germination Acre irrigated areas, walls, roadways, or structures. Anntspon picker ss.o•.'... scoporius deenueed 185.000 95 BO 3.00 „._ErrEnErlEMI 5.246,000 nnMICIIII .'-,/Socchans Pihdans Cril 8,043,000 nnillinin 4.The water delivery rate shall be matched to the slope gradient and the percolation rate of the soil. /CMISIE113:1 =320,300 allinin/VIM California buckwheat 560,000 50 10 20.00 5.Irrigation shall deliver water sufficiently and uniformly,and shall be appropriate to the needs of the plant materials. /FIrrallet =lal 3,500,000 pt 4.. - Mimulu ourontiocus5 MEM 66 6.Overwatering as evidenced by soggy soils, standing water, runoff in street gutters and other similar conditions shall;...puniceus 12,000,000 3 OD .Ern 265,000 nillain .if be managed and prevented.EnrITEMMIM 516,000040.''Crirn foothill needlnifass 40%000 11111311111100 Stipa pukhro, - 7.The Reveget tion Area nCsit.MYnCliEtCtOcireigAiturvival and growth of plant material without supplementaldeawnedpurpleneediegraSS107,000 90 al 10CIO ..„.---,_irrigation for two consecuthaltiffithitisth4Fnktitof supplemental irrigation after 3 years following acceptance of... „../-..-_-- 1.--^x"-t•installation).______r•-`t C-.el“--7/1Nr--JNI.—--t '------• 6.1) 2.ot 7-003 Z •.••:,4 r'-' Table 1: Success Criteria Table 2: Summary of Schedule for Maintenance, Monitoring, and Reporting for the Project Case No.Pi---/i •."..0 u Lj Ultimate Vegetative Cover Performance Standards Activity for Project Project Biologist Site Submittals/a ) Native Cover Nonnative Cover Bare Ground Period Biologist/Contractor Visit Frequency Checklist Reporting Frequency Exibit Na.11A .Date . At least 80 percent No more than 5 percent No more than 25 percent Revegetation Project Biologist will be As needed or at least Memo prepared One memo at completion I— Installation responsible for once every two weeks by the Project of successful installation "` monitoring; Contractor Biologist (as determined by the•Upon completion of the monitoring period, vegetation within the site should be adequately established and will be will be responsible for Project Biologist)Summary Table 1 0 Reviewed -No Exceptions capable of surviving without supplemental watering for the final two years, prior to completion.LSA Associates, Inc.installation and 2 0 Reviewed -Exceptions Noted••The mitigation site may be considered successful if qualitative observations are made that indicate wildlife is thriving maintenance APNU:2122710300 703 Palomar Airport Road, Suite 260 120-day Project Biologist will be Monthly Memo prepared One memo at conclusion of 3 0 Revise & Resubmit Site Acreage: 0.05 40 Rejected Carlsbad CA 92011Warranty Period responsible for by the Project the Warranty Period (as monitoring; Contractor Biologist determined by the Project Street Address: 1525 Faraday Ave. Carlsbad,CA 92008 Reviewed only for general conformance with the project requirements indicated in Contract Documents and forwill be responsible for Biologist)con: istency with the project design concept. This review does not relieve the Contractor from responsibility, formaintenanceExisting Land Use: Open Space errois or ommissions in designs for which the contractor is responsible for compliance with all requirements of the5-year Project Biologist will he Monthly duringYear 1,Memos prepared Monitoring Memos will be Proposed Land Use: Open Space Contract Documents, and for the safe and successful construction of the work. This review does not consider the FARADAY AVENUE SLOPE REPAIR PROJECT Maintenance responsible for bimonthly during Year by the Project submitted monthly during means,methods,techniques,sequences,and operations of construction,or safety,precautions or programsand Monitoring monitoring; Contractor 2, then quarterly for Biologist; Annual Year 1,bimonthly during Percent of site to be landscaped: 100%incidental thereto, which anythe sole responsibility of the Contractor.(LSA Project No.H CR1704)Period will be responsible for Years 3 through 5 Monitoring Year 2, then quarterly for maintenance (contingent upon Reports Years 3 through 5.Square footage of open space: 2,000 Date:satisfactory site Monitoring reports will be REVEGETATION PLAN conditions)submitted annually.Earthwork volume: 300 CY of imported fill Checked By:Signature: Seed Mix Maintenance Requirements 1.The specified seed mix shall be applied to the entire project site. The seed shall be installed via hydroseed method,1.The Revegetation Area shall be maintained for a period of not less than 5 years or as determined by the Project unless otherwise directed by the Project Biologist.Biologist. All revegetated areas shall be maintained by the Contractor until final approval by the Project Biologist and City Staff. The maintenance period begins on the first day following the acceptance of the installation (at the end of 2.Seed shall be applied between October 1 and March 1 during the rainy season.120-day Warranty Period). 3.All seeds shall meet the minimum number of live seed per pure live pound, percent purity, and percent germination 2.Prior to final approval, City Staff may require corrective action including, but not limited to, weed eradication and figures,as noted in the coastal sage scrub/erosion control seed mix table. If these figures cannot be met, the removal and the repair of any soil erosion or slope slippage, in consultation with the Project Biologist. Contractor will coordinate and obtain approval from the Project Biologist for alternative compliance.3.Weeding, herbicide, and/or pesticide application shall be done regularly by the Contractor. Weeding shall be done at 4.Contractor shall retain and submit all seed tags for seed products to be used to the Project Biologist prior to a minimum frequency of bi-weekly until the end of the 120-day Warranty Period and bi-monthly during the 5-year application.main nce period, unless a greater frequency is warranted. Weeds shall be properly disposed of offsite. Contractor sh tain approval from the Project Biologist prior to herbicide/pesticide application, and shall apply cide/pesticide per manufacturer's recommendation and any State or Federal guidelines. Contractor must s a valid state pesticide and/or herbicide license at all times. Seed Application Procedures 1.Seeding shall occur only after the Project Biologist has observed and approved that the Revegetation Area has been •Contra all control weeds as identified by the Project Biologist such that no weed cover exceeds 5 percent of properly prepared.the proje before they exceed 12 inches in height, and before they set seed. Areas where weeding creates in excess of 2 e feet of bare soil shall be reseeded and maintained by Contractor. 2.The Revegetation Area shall be seeded using a two-stage hydroseed application method. Preventive measures must be taken to avoid damage to adjacent native vegetation (i.e., spraying and covering plants with mulch, breaking stems, or branches with hoses). The application procedure is as follows: •First Application -150 pounds per acre (lbs/ac) of 100 percent long-strand wood fiber (no tackifier) -Specified seed •Second Application -2,000 lbs/ac of 100 percent long-strand wood fiber (no tackifier) -150 lbs/ac Ecology Control "M" binder All hydroseed mixing shall be performed in a clean tank. It is the Contractor's responsibi •locate a s.•of clean water and a washout area where rinsing can legally be carried out. The hydrose -must be equipp•ith a built-in continuous agitation and recirculation system of sufficient operating capacity to •uce homogene slurry, as well as a discharge system that will apply slurry to the designated areas at a con s and unifo ate. The slurry preparation shall take place at the project site and shall be started by adding water t••ile the engine is running at half-throttle.Good recirculation shall be established when the water level has -d the height of the agitator shaft, at which time the seed and fertilizer shall be added. The long-strand wo••fiber shall be added when the tank is at least 30 percent filled with water. The Contractor shall commence spraying once the tank is full and homogeneous slurry has been created. The Contractor shall spray the Revegetation Area with the slurry in a sweeping motion and in an arched stream until a uniform coat is achieved, with no slumping or shadowing,as the material is spread at the required rate. The hydroseed slurry should float down from the arched stream,as opposed to being shot directly at the ground. Excessive mulch coating on adjacent vegetation must be removed before the end of the day. The tanks must be emptied completely during each stage of hydroseeding. Any slurry mixture that has not been applied by the Contractor within 1 hour after mixing shall be rejected and replaced at the Restoration Contractor's expense. In addition, all cost incurred for repair or replacement of bare, sparse, or damaged areas shall be the sole responsibility of the Contractor. Following application, all activity on the mulch layer must be kept at a minimum.