DOE/ORO/2327 Oak Ridge Reservation Annual Site Environmental ...

Annual Site Environmental Report
treatment technologies and disposal facilities (federal or commercial) that are able to manage mixed waste
produced at federal facilities and to develop a schedule for treating and disposing of the waste streams.
The ORR Site Treatment Plan (TDEC 2008) is updated annually and submitted to TDEC for review.
The updated plan documents the current mixed-waste inventory and describes efforts undertaken
to seek new commercial treatment and disposal outlets for various waste streams. NNSA has developed a
disposition schedule for the mixed waste in storage and will continue to maintain and update the plan as a
reporting mechanism, as progress is made. Y-12 is reducing inventory of legacy mixed waste as part of
the plan (see Fig. 4.16).
Fig. 4.16. Reducing inventory of legacy mixed waste as part of
the ORR Site Treatment Plan.
The quantity of hazardous and mixed wastes generated by Y-12 increased in 2009 (Fig. 4.17). The
increase was attributed to the treatment of more than 6,000,000 kg of additional contaminated
groundwater. This directly correlates to 43 cm (17 in.) more rainfall in 2009 than in 2008. Waste resulting
from repackaging and disposal of legacy mixed waste also increased. Legacy mixed wastes are being
repackaged and disposed of in accordance with milestones in the ORR Site Treatment Plan. Progress on
disposition of legacy mixed wastes exceeded established milestones for FY 2009. Ninety-seven percent of
the total hazardous and mixed waste generated in 2009 was generated as contaminated leachate from
Fig. 4.17. Hazardous waste generation, 2005–2009.
The Y-12 National Security Complex 4-27