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pool will need to be closed for the service so this work can only be done on non-scheduled use time. Underwater Lighting - Weekly Once a week all GFCI's for underwater lighting will be operationally tested and the results noted on the GFCI Log Sheet for the affected pool.All breakers will be reset at the end of the test. Preventive/Mechanical Maintenance - Monthly The contractor shall submit a preventative maintenance plan based on the Support Services Divisions Best Practices and any corrections to the mechanical systems shall be approved by the Support Services Division before work is commenced. Monthly, all water filters that service the Becsys Controller shall be removed from service and thoroughly cleaned. The Becsys ORP and pH sensor probes from all controllers will be removed from service and cleaned with a mild detergent, per manufacture's standard. This to include the two Becsys flow cells and filters. The injection points/fittings and chemical tubing for Sodium Hypochlorite and Hydrochloric Acid will be cleaned monthly on all pools. Monthly,all backwash valves will be lubed and rebuilt as need per manufactures standards. For all parts that need to be replaced they will be re-imbursed with the percentage mark up that is submitted with the bid proposal. Water Slide Maintenance—Bi-Annually The City owns and operates a White Water Slide in the Shallow Pool. The slide has one 10 hp Paco pump in a vault at the bottom of the slide. The water flow as indicated by a flow meter on the side of the supply piping shall always be 800 gallons per minute per manufacture's recommendations. The slide flume shall be visually inspected daily during scheduled use days and the results logged in the water slide inspection Logbook. Bi-Annually, the entire length of the water slide shall be deoxidized and waxed with an approved process and materials.