Construction Update, March 2008 Pretreatment Facility

Low-Activity Waste Vitrification Facility

• Exhaust stack placed
• All exterior siding installed
• Decontamination bay doors installed
• Currently constructing East Annex , West Import Bay and North Annex
• Currently installing HVAC duct work, electrical wiring, light fixtures, roofing and gutters
• Melter Assembly Pad concrete laid

Analytical Laboratory

• All structural steel completed
• Second story flooring placed
• Placing HVAC duct work in hot cell area
• All exterior siding installed
• Protective wall coatings installed
• Hot cell monorail system installed
• Roofing complete

Pretreatment Facility

• Protective wall coatings on installed
• Exterior concrete walls up to 56 feet installed
• Currently placing structural steel and concrete
• Waste receipt tanks installed

Balance of Facilities — 23 support facilities and underground utilities

• Currently installing steam piping and pipe rack between
• Nearing completion on Cooling Tower Facility, Diesel Fuel Oil Facility and Steam Plant Facility. Three glass formers silos erected.
• Fire Water System turned over to Start-Up for testing

High-Level Waste Vitrification Facility

• Installing protective wall coatings
• Working on structural steel and concrete placements
• Preparing drum transfer tunnel for coating