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9.Ammonia Detection System <br />a.The ammonia detection system should be replaced in the next five years. <br />Brine Pumping System <br />1.Brine <br />a.The brine should be replaced in the next five years pending further testing and <br />evaluation of the brine. The City should consider getting a second opinion of the <br />brine condition from an independent brine testing and treatment contractor. <br />b.A new polyethylene or fiberglass brine filtration system that is non-corrosive, should <br />be installed to replace the steel system within the next five years. <br />c.Energy saving idea: If upon further evaluation a flat plate chiller design is proven <br />feasible the brine should be changed to ethylene-glycol brine should be installed <br />and the existing calcium-chloride brine should be completely flush out of the piping <br />system. <br />2.Transmission Mains <br />a.Transmission mains are in good shape and should provide another 20 years of <br />service. <br />3.Brine Pumps <br />a.The brine pumps, motors, and bases could be cleaned up, painted, and kept in <br />service for another five years. Replacement should be evaluated at that time. <br />b.Energy saving idea: The brine pumps could be replaced with motors with VFD <br />starters to minimize horsepower when full capacity is not needed. <br />4.Expansion Tanks <br />a.The failed bladder expansion tank should be replaced when improvements to the <br />facility are made. <br />b.The accumulative volume of brine system releases should be monitored until the <br />failed bladder tank is replaced to make sure that brine releases don’t exceed a <br />volume that needs to be replaced for proper operation. <br />Refrigerated Rink <br />1.Refrigerated Concrete Slab <br />a.The expansion joints are all in need of some repair. We recommend they be <br />reconstructed as part of any renovation process. <br />b.Any future renovation improvements should include an insulated grade beam <br />located around all outside edges of the refrigerated slab with an expansion joint <br />located between the grade beam and the rink slab to accommodate rink slab <br />movements. <br />Perimeter Paving <br />1.In conjunction with installing a perimeter grade beam and expansion joint, the paving and <br />turf surrounding the ice rink slab should be reconstructed to provide positive drainage to <br />the perimeter drainage system. <br />232323 <br /> <br />