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2014SumShotcreteEMag

Durable Efficiency To the casual observer, the watershape at Canterbury High School looks like any other competition swimming pool—a standard 25 m (82 ft), eight-lane rectangle—but closer examination reveals every feature of this particular facility as being first-rate, from the lighting and HVAC systems to the pool’s all-tile finish and surrounding decks. The pool also boasts wonderful circulation and water-treatment systems more than capable of handling its 308,000 gal. (1,165,907 L) capacity and turnover of 1100 gal./min (4164 L/min) (that is, once every 4 hours, 40 minutes). The system is driven by a 20 hp (15 kW) flooded-suction pump from Paco Pumps (Brookshire, TX), while filtration is handled by a 60 ft2 (6 m2) stainless steel vacuum sand filter from Paddock Industries (Rock Hill, SC). The filter is a huge, open tank, fully automated with a 300 gal./min (1136 L/min) backwash flow that uses an air-scour blower. This sub-grade filter also has ample capacity to handle the bather surge. The IFRS-ASR System 3 stainless steel gutter system, also supplied by Paddock, includes a tile fascia and combines the gutter with the return-plumbing system—meaning all the flow back into the pool is handled via the gutter, thus minimizing penetrations of the pool shell. The overall system is designed for speed, minimizing wave action during competition and allowing for “automatic surge recovery,” which means that if there’s a sudden bather surge, an auxiliary pump activates, evacuates the gutter, and momentarily reverses flow through three 24 in. (610 mm) square main drains (each of which is equipped with a hydrostatic relief valve). This way, the gutters never flood to the point at which they might cause waves to rebound into swimming lanes. Chemical treatment is handled by an automatic sodium hypochlorite system from PPG (Pittsburgh, PA) managed by a PC 6000 ORP controller from Chemtrol (Santa Barbara, CA). That primary system is supported by an ultraviolet treatment system supplied by Hanovia Ltd. (Slough, Berkshire, United Kingdom) that reduces chlorine demand. —W.D. Over 30 years of experience, nationwide service.... American Concrete Restorations, Inc. Amerconcrete@aol.com www.americanconcreterestorations.com Phone: 630-887-0670 Fax: 630-887-0440 Restoring America using the Shotcrete Solution Interstate 80 - Joliet, IL Shotcrete • Summer 2014 15


2014SumShotcreteEMag
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