U. S. Steel Kosice subsidiary Labortest, s.r.o. has been operating on the market for testing services since 1995. It has established itself in the field of chemical analyses, testing, analysis and setting physical and mechanical characteristics of materials, as well as advisory and consultancy activity regarding evaluation of metal and non-metal materials. Each of the company's laboratories and mechanical testing shops is separately accredited through the Slovak National Accreditation Service (SNAS), which means that the results of their tests are fully accepted in the Slovak Republic and abroad. As Managing Director Ladislav Rozek explains, the company is progressively introducing new types of testing with the aim of both improving the quality and reducing the costs of their laboratory tests. The quality of the new types of ecological tests has recently been approved and accredited by SNAS as well, involving analyses of ground water and types of waste water.