• Credit: Thomas Tomasetti

MATERIALS AND SOURCES: / HVAC EQUIPMENT / Trane, Piscataway, N.J., www.trane.com; Carrier Corp., Farmington, Conn., www.carrier.com; and Liebert, Columbus, Ohio, www.liebert.com / WATERPROOFING MEMBRANE FOR VEGETATED ROOF / Sika Corp., Lyndhurst, N.J., www.sikaconstruction.com / ALUMINUM WINDOWS AND DOORS / EFCO Corp., Monett, Mo., www.efcocorp.com / LIGHTING / Musco Lighting, Oskaloosa, Iowa, www.musco.com / CARPET PRODUCTS / Durkan, Calhoun, Ga., www.durkan.com; Bentley Prince Street, City of Industry, Calif., www.bentleyprincestreet.com; Tandus, Dalton, Ga., www.tandus.com; Lees, Glasgow, Va., www.leescarpets.com; Atlas Carpet Mills Inc., Los Angeles, www.atlascarpetmills.com; Masland, Mobile, Ala., www.maslandcarpets.com; and Invision Carpet Systems, Dalton, www.invisioncarpet.com / URINALS, LAVATORY, SINKS AND TOILETS / American Standard, Piscataway, www.americanstandard-us.com / TOILETS AND FAUCETS / Kohler, Kohler, Wis., www.kohler.com / KITCHEN SINKS AND FAUCETS / Elkay Manufacturing Co., Oak Brook, Ill., www.elkay.com / DUAL-FLUSH VALVES / Zurn, Mississauga, Ontario, Canada, www.zurn.com

GREEN POINTS: Built on a brownfield site, the Nationals Park is the first Major League Baseball stadium to receive LEED Silver certification from the Washington-based U.S. Green Building Council. Efficient field lighting, a 6,300-square-foot (585-m2) green roof and recycling help make the ballpark green. Millions of gallons of water will be saved each year through waterconserving plumbing fixtures and air-cooled chillers. About 20 percent of the ballpark’s construction used recycled materials and 5,500 tons (4990 metric tons) of construction waste was diverted from landfills. Because the site is close to the Anacostia River, a water-filtration system separates water used for cleaning the ballpark from rainwater falling on the ballpark. Both sources are treated before being released to the sanitary and storm-water systems. Special care also is given to screening organic debris, like peanut shells, from the storm-water system. Signs around the park educate visitors about the stadium’s sustainable aspects.

Project provided by HOK Sport, Kansas City, Mo., www.hoksve.com