Carl Keller is the owner and principal scientist of Flexible Liner Underground Technologies (FLUTe), a business of fabricating and installing the products of his inventions which include a wide range of unique underground measurement methods and monitoring techniques related to ground water contamination. At FLUTe, he performs the duties of principal scientist and CEO. He also serves as a consultant on matters of his scientific experience. He has patents on multi-level ground water sampling methods, hydraulic conductivity measurements in boreholes, the lining of ducting for decontamination, a progressive packer device for horizontal holes, liner augmentation of horizontal drilling, DNAPL mapping, mapping the dissolved phase of contaminants, mapping the vertical head distribution, and rehabilitation of piping and sewer lines. He has 30 patents on underground measurement methods, 29 use flexible liners. He has patents in 13 foreign countries. His methods are in use in all 50 States, Canada, Brazil, Japan, Denmark, Sweden, France, UK, Israel, Saudi Arabia, Australia, South Africa, South Korea, Germany, and Spain. In 2008 he received the National Groundwater Association Technology Award.
