Materials and Methods for Healthy Buildings. A.Seppala Total Quality Oy (ASTQ Supply House) is a trading company specialized in selling products which are used for the safe removal and /or handling of environmentally hazardous substances. ASTQ has been founded on 24 of May 1995. ASTQ is particularly active in the asbestos cleansing sector as well as the suppression of calamities and virological contagions such as birdflu and swine fever. Everywhere where exuberant (toxic) substances cause a direct danger for the environment.