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" "j, OF SUN pr, each month. On the first day of each month report to City, in writing, indicating proper operation of each zone, required repairs, additional costs and updated run time per zone. Contractor shall ensure that all irrigation systems have 100% coverage with 50% overlap. L19. The Contractor, at his /her expense, will be responsible for the proper maintenance, replacement, repair, or retro - fitting of all irrigation components. The wholesale cost of parts only will be borne by the City, with proper documentation and approval by the City. Labor costs will be paid by the City at the contract approved hourly rate. Any necessary repairs, other than routine irrigation head replacement must be approved in writing by the City prior to start of work. L20. Fertilizer and materials shall be delivered in original, unopened, and undamaged containers showing weight, analysis, and name of manufacturer. All fertilizer materials shall be stored in manner to prevent wetting and deterioration. L21. Fertilizer and insect /disease control materials shall be applied at the rates established by accepted horticultural standards, manufacturer's recommendations, by certified specialists, and as approved by City. Contractor shall provide a list of suppliers for the fertilizer / insect control materials for approval by the City. L21.1 Lawn: For control of fire ants, use Award Fire Ant Killer. Follow manufacturer's instructions for applications amounts and rates. L21.1.1. February — Apply granular 20 -0 -20 with Atrazine or approved equal; St. Augustine'Floratam' Sod and 'Argentine' Bahia Sod, L21.1.2. May — Apply liquid 16 -4 -8 with micro - nutrients and Telstar or equal insect control. L21.1.3. September — Apply liquid 16 -4 -8 with micro - nutrients and Telstar or equal insect control. L21.1.4. December — Apply granular 20 -0 -10 with Atrazine. L21.1.5. The Spring thru Fall application rates for lawn areas will vary according to weather and environmental conditions, but typically average 75 granular pounds per 1000 sq. ft. L21.2 Palms (except Phoenix Dactilifera and Phoenix Canariensis Date Palms): L21.2.1. Apply four applications per year (at quarterly intervals) of liquid 16 -4 -8 with micro - nutrients and granular 13 -3 -13 with micro - nutrients. L21.2.2. The time of the applications will coincide with the lawn applications. L21.2.3. The liquid and granular applications will alternate throughout the year (2 applications of liquid and 2 of granular). L21.2.4. Supplemental Manganese Sulfate and Sul- po -mag may be required to correct nutrient deficiency. L21.2.5. OTC (Lethal Yellowing) injections, as required. L21.3 Trees: City of Sunny Isles Beach I Request for Proposal No. 12 -05 -01 .