Gilson recently hosted the Ohio Aggregates & Industrial Minerals Association (OAIMA) Level II Technician Training December 1 st and 2 nd. Technicians, plant foreman, operators and other industry workers from around the area gathered at our Lewis Center, Ohio office to obtain certification. The course covered proper test procedures and hands-on demonstrations for sampling, sample reduction, No. 200 washing, sieve analysis of coarse and fine aggregates and more. Visit the OAIMA website for a complete list of covered topics.