Electronic solution used to identify defective linerProblem: The James City Service Authority in Williamsburg, Va., contracted with a national CIPP lining company to use trenchless technologies to rehabilitate 15- and 18-inch Flextran gravity sewer pipe. Installed in the early 1970s, it is a thin-walled fiberglass pipe that has proved susceptible to structural failure. The anticipated rehabilitation involved CIPP lining to strengthen the host pipe and significantly reduce storm and groundwater infiltration in the sanitary sewer system. Danny Poe, P.E., project manager for JCSA, required the lining contractor to CCTV and Electro Scan all post-CIPP linings prior to acceptance.Solution: Electro
