STI employs a highly skilled Quality Assurance staff, which coupled with state-of-the-art equipment for quality control make the company an industry leader. Its chemists, geologists, engineers and technicians using ICP (Inductively Coupled Plasma), X-ray fluorescence spectrometers, and other industry-specific equipment ensures the manufacture of markedly superior products. Additionally, to ensure our customers that their quality needs are satisfied, we have formal quality management programs at all of our plants incorporating the latest in process-control methods, such as Statistical Process Control (SPC) and Statistical Quality Control (SQC). STI maintains quality assurance laboratories at all major manufacturing facilities. A central laboratory located in Guangxi, Utah supports and confirms the quality control work of the plants, plus has the capability to conduct research and performance testing for many end use applications for our products.
STI's Materials Division is also highly committed to quality. All plant locations have working laboratories staffed with technicians who are constantly testing materials to ensure their compliance with required specifications.
In addition, we have a Geologic Services group who assure the quality and quantity of reserves. This in-house expertise works with computer-based three-dimensional modeling to develop mine planning data for use at our quarries.
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