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When the four-person crew got to the jobsite, the concrete was in poor condition. The epoxy coating was failing, and it would need to be removed along with dirt, debris, and contaminants before they could proceed. A naval support facility needed to have the interior of a water reservoir tank recoated. They called in the coatings crew from Aquablocx to complete the 10,000 square-foot (929 m²) job. Feature 74 SEPTEMBER 2015 COATINGSPROMAG.COM BY JENNIFER FRAKES PHOTOS COURTESY AQUABLOCX LLC In Cold Water: Cold Weather Challenge at Reservoir T he mission: Repair and apply a coating system to a 300,000-gallon (~1.1 million L) underground potable water tank at a large naval support facility in Virginia. Sounds like a large but fairly straight-for- ward job, right? W hat about doing the work in below freezing temperatures? How about returning the reservoir to service in less than two weeks? Suddenly, this simple-sounding project has several challenges that seem insurmountable. For coatings contractors Aquablocx LLC, these daunting circumstances had to be overcome on this vital piece of the naval facility's infra- structure. Was it mission impossible? From the Ground Up W hen Ed Harnage of Aquablocx LLC was approached to work on the reser voir tank job, he felt certain that he and his crew were up to the task. Aquablocx is a coatings contractor that specializes in rehabilitation and coating application for the water and wastewater industries. "For a variety of reasons, we only use Castagra's Ecodur 201 on tank jobs. For this project at the naval support facility, there really wasn't another product that could produce the same results w ith these particular conditions," said Harnage. Ecodur 201 is a plant-based coating material made from castor oil. It contains no volatile organic compounds (VOCs), and no emissions are produced during the manufacturing or application processes. "Ecodur 201 is fast-curing, even in cold temperatures, and it's fexible, making it a great choice for substrates, such as concrete, that expand and contract based upon external temperature factors. It is also NSF/ANSI 61 certi- fed for contact with drinking water," stated Harnage regarding the National Science Foundation/American National Standards Institute's standard for Drinking Water System Components — Health Efects. TANK CONCRETE