In May 2010 KDHE instigated a Supplemental Sampling Assessment at the Kanotex Refinery site. The Supplemental Sampling Assessment is a phased investigation to determine the magnitude, extent, and volume of metals contamination in soil, TPH-GRO contamination in soil, and metals contamination in sediment. The first phase, determining the extent of metals contamination in soil, is still in progress. KDHE will continue the Supplemental Sampling Assessment investigation into 2011.