During this reporting period, Environmental Restoration supervised the roll-off box being picked up and removed from Brenau. The box contained non-hazardous debris generated from the removal action and was emptied at the Waste Management R&B Landfill in Homer, GA.
On 02OCT09 OSC Jardine returned to the site to check the airborne mercury levels in the lab and closet, as well as the residual contamination off gassing from the mercury-contaminated articles that were removed from the classroom and closet during the removal action.
John Keller, Director of Facilities for Brenau had prepared the closet by removing the fans from the windows, closing the windows, and locking the door to the classroom. The mercury-contaminated articles had been unwrapped and stored at the maintenance shed over the past month.
The closet and classroom/lab each tested below 150 ng/m3 as measured with a Lumex mercury vapor analyzer. The readings remained stable over an hour period as demonstrated by a return visit to each.
Of the ten bags of articles, fiive bags each tested below 2000 ng/m3 (some well below) and are proposed to be returned to service in the Science department. The other five bags tested between 4,200 and over 50,000 ng/m3 and are proposed for disposal. The items proposed for disposal were contaminated by vapors of a barometer as opposed to gross mercury contamination. These items should be considered part of the non-hazardous removal generated debris as identified and analized during the removal action.
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