OceanSound-backed RMA Group, a civil engineering firm serving California, completed the acquisition of C Below, a technologically advanced subsurface imaging service provider. Financial terms were not disclosed. “We established C Below in 2009 to address the growing demand for non-destructive testing systems for the location, imaging, and mapping of underground utility assets. After reaching an inflection point in our growth, we sought a partner that could help drive rapid expansion without compromising our values or reputation for high-quality service. Having known Ed Lyon for many years, we are confident we found the right partner,” Dave Menefee, President of C Below.