it’s in steel drums stacked three high.
Supposedly what is in these drums are items that have come in contact with radioactive material.
http://www.cbsnews.com/stories/2011/06/29/national/main20075315.shtml
Lab Director Charles McMillan said the barrels contain transuranic waste — gloves, toolboxes, tools — and other items that may have been contaminated through contact with radioactive materials. Top lab officials declined to say how many barrels were on site or how they are stored. An anti-nuclear group has estimated there could be up to 30,000 gallon-drums.