GASTON, S.C. & ANAHEIM, Calif.–(BUSINESS WIRE)–EFI USA (EFI) and EC Applications (ECA) today announced their merger, combining their complementary expertise in environmental construction, geosynthetic membrane installation and infrastructure delivery to form the most comprehensive environmental containment company in the United States. The combined organization serves clients across environmental, agricultural, industrial, and federal sectors. Together, the organization brings turnkey constru