Normally, assessing wall thickness in a pressurized water or sewer line and main requires shutting down the line and cutting into it. But broadband electromagnetic scanning is finding increasing use as a viable, non-destructive testing alternative that does not interrupt utility service.
This fall, BEM scanning contributed to a condition study of a 1970s-era force sewer main for the Metropolitan Sanitation District of Greater Cincinnati. Malcolm Pirnie, the water division of ARCADIS, Highlands Ranch, Colo., is the assessment contractor.