Environemental Laboratory, US Army Engineer Research and Development Center, Vicksburg, MS 39180, USA. Michael.L.Mayo@usace.army.mil|Environemental Laboratory, US Army Engineer Research and Development Center, Vicksburg, MS 39180, USA. Michael.L.Mayo@usace.army.mil|Environemental Laboratory, US Army Engineer Research and Development Center, Vicksburg, MS 39180, USA. Michael.L.Mayo@usace.army.mil