USACE St. Louis District project engineer for the Formerly Utilized Sites Remedial Action Program, Capt. Maria Pascual, collects soil samples collected by Leidos contractors for chain of custody, as part of the Quality Assurance / Quality Control process. Boring for soil samples began Wednesday., Oct. 26, and sampling is expected to be complete in approximately two weeks, pending cooperative weather. (USACE photo by JP Rebello)