1. Air monitoring conducted in the work zones occasionally showed elevated levels of contamination that were predictably associated with EPA's work of clearing debris and opening containers. All personnel in the work areas continued to wear appropriate respiratory protection. The sampling team upgraded to supplied air as the number of unknown containers increased. There were no elevated levels of contamination detected in the perimeter air monitoring.
2. EPA largely completed clearing debris from the basements of the administrative and meat packing buildings and continued to clear debris from the first floor of the meat packing building. EPA removed debris from the yard north of the meat packing and garage buildings in anticipation of treatment and bulking activities. To date, a total of roughly 1200 cubic yards of non-hazardous debris has been shipped off-site for disposal and 360 cubic yards of metal has been shipped off-site for recycling.
3a. EPA continued to address a room in the basement of the meat packing building where a historic mercury spill occurred. The mercury mixed with Libby Amphibole Asbestos was cleared during the last operational period but additional mercury and more Libby Amphibole (used as packing material in boxes of oil) were found further back in the room. Crews are now clearing this material and other containers from this room.
3b. Containers were collected from the basements, first floor of the meat packing building, pole barn, garage and yard north of the meat packing building. These containers were moved to a staging area in the basement for assessment and/or sampling.
4. Over 900 samples have been analyzed as part of EPA's effort to characterize hazardous materials. Several thousand other containers have been also characterized based on their labels. Crews are now segregating these containers according to their chemical characteristics in preparation for treatment and/or bulking.
5. Crews are preparing the yard north of the meat packing building for treatment of the calcium hydride and hydrofluoric acid that has been discovered on Site. The team is installing a series of six 1000 gallon tanks in the area north of the garage building for bulking materials before disposal. Several lined pits are also being constructed to the east of the meat packing building for treatment of solid waste.
6. EPA shipped approximately 2110 gallons of engine lubricant oil off-site for disposal from 40 drums that have been collected in the basements.