A 1992 consent order from the U.S. EPA to reduce sanitary sewer overflows started the Wastewater Collection Division of the Miami-Dade (Fla.) Water and Sewer Department on its formal I&I program.Precast concrete manholes corroded by sulfuric acid were the primary contributors. Crews repaired them using grout and Type 2 cement. Meanwhile, operators at the South District Wastewater Treatment Plant were successfully combating concrete and metal corrosion with Uroflex semi-structural (flexible) urethane-modified epoxy coating from Epoxytec.Because the product was in the county system and easy to buy, Rod Lovett, Wastewater Collection Division chief, tried it. “Every material we use is tested,
