1. Waste Management Strategy Outline - Geography - Future Needs – 5 and 25-Year Time Frames - Capacity - Near-Term Needs - Long Term Needs

2. Waste Management Areas

3. Waste Stream Definitions Three types of waste soil: Institutional Controls Program (ICP) - Homeowner demo and renovation projects - Commercial, infrastructure development Basin Property Remediation Program - Yard cleanup program Ecological Remediation - Upper Basin: mine sites and tailings - Lower Basin: river bed and bank deposits

4. Total Future Needs

5. 25-Year Repository Needs Projection Sub Regions Waste Streams Total (cy) ICP (cy) BPRP (cy) Commercial Development (cy) Infrastructure Redevelopment (cy) Eco-RA A (cy) Range of Uncertainty 10% - 25%5% - 10%25% - 50% Lower Basin150,405204,595002,643,9012,998,901 Box564,5000B0B 460,000176,000250,000 C 1,450,500 Upper Basin262,551249,606 D 253,458282,000770,4001,818,015 East Upper Basin 49,837D0067,260117,097 Grand Total6,384,513

6. Near-Term Repository Needs Sub Regions Near-Term (0 – 5 Years) Waste Streams Total (cy) ICP (cy) BPRP (cy) Commercial Development (cy) Infrastructure Redevelopment (cy) Lower Basin15,78694,85800110,644 Box106,5000A0A 137,00050,000293,500 Upper Basin21,917226,292 B 40,557105,000393,766 East Upper Basin 7,898B00 Grand Total805,808

7. Long-Term Repository Needs Sub Regions Long-Term (6 – 25 Years) Waste Streams Total (cy) ICP (cy) BPRP (cy) Commercial Development (cy) Infrastructure Redevelopment (cy) Eco-RA (cy) Lower Basin 134,619109,737002,643,9012,888,257 Box458,0000A0A 323,000126,000250,000 B 1,157,000 Upper Basin 240,63423,314 C 212,901177,000 ] ] 770,4001,424,249 East Upper Basin 41,939C0067,260109,199 Grand Total5,578,705 [

8. Estimated Capacity

9. Remaining Capacity (Page capacity assumes approval of footprint expansion) Sub RegionRepository Total Capacity with Current Footprint Remaining capacity with current footprint Total Capacity with Footprint Expansion Remaining Capacity with Footprint Expansion BoxPage Repository1,187,000 cy400,000 cy3,142,000 cy2,355,000 cy A Upper BasinBig Creek Repository220,000 cy32,500 cy505,800 cy318,300 cy Lower BasinEMF Repository400,000 cy NA East Upper Basin Mullan Repository35,000 cy NA

10. Short- and Long-Term Repository Waste Balance

11. Existing Repositories

12. Near-Term Waste Balance Sub Regions Near-Term (0 – 5 Years) Waste Streams Total (cy) Repository Capacity Surplus/Deficit (cy) ICP (cy) BPRP (cy) Commercial Development (cy) Infrastructure Redevelopment (cy) Lower Basin 15,78694,85800110,644289,356 Box106,5000A0A 137,00050,000293,5002,061,500 Upper Basin 21,917226,292 B 40,557105,000393,766(75,466) C East Upper Basin 7,898B00 27,102

13. Long-Term Waste Balance Sub Region s Long-Term (6 – 25 Years) Waste Streams Total (cy) Repository Capacity Surplus/Deficit (cy) ICP (cy) BPRP (cy) Commercial Development (cy) Infrastructure Redevelopment (cy) Eco-RA (cy) Lower Basin 134,619109,737002,643,9012,888,257(2,598,901) A Box458,0000B0B 323,000126,000250,000 C 1,157,000904,500 D Upper Basin 240,63423,314 E 212,901177,000770,4001,424,249(1,499,715) East Upper Basin 41,939E0067,260109,199(82,097)

14. Total Repository Capacity Needs

15. Questions? Comments?

16. East Mission Flats Update - Archaeological Monitoring Report - Groundwater Monitoring Program - Flood Monitoring - Phase I Operations - 60% Design Report - Visual Simulations

17. East Mission Flats Update Archaeological Monitoring Report No recorded sites on State Register at EMF site; 10 test pits excavated in July 2007, no cultural resources observed in any of the 10 pits; Cuttings from 12 drill holes were monitored in October 2007; no cultural resources observed in any of the 12 drill holes; and Recommend to have an archaeologist on-site to observe all excavations scheduled for the site.

18. East Mission Flats Update Groundwater Monitoring – December 2007 - Four wells sampled - Water levels suggest flat surface; flow from NW to SE - No dissolved metal concentrations reported above drinking water standards (MCLs) - Existing soil contamination has no significant impact to groundwater - Underlying “native” soil sorbs leaching metals - Next sampling event in March 2008

19. East Mission Flats Update December 2007 Results (in mg/L) Constituents Well No.AntimonyArsenicCadmiumLeadZinc MW-AND 1 ND0.000578JND0.347J MW-BND 0.0243J MW-CND 0.0013JND1.45J MW-DND 0.0326J Reporting Limit0.003 0.00020.0030.0025 Regulatory Threshold0.006 2 0.01 2 0.005 2 0.015 2 5.0 3 Notes 1. ND - Not detected above method reporting limit 2. MCL - Maximum Contaminant Level - enforceable 3. NSDWR - National Secondary Drinking Water Regulation - non-enforceable J - Reported concentration an estimate based on data quality review

20. East Mission Flats Update Flood Monitoring - Two level loggers installed this week - Hourly readings through June 2008 - Compare results to Cataldo Gaging Station to establish stage- water level relationship - Use data to compare to HEC RAS flood model - Incorporate results in 90% Design Report

21. East Mission Flats Update Phase I Operations - Phase I Design Report out for Agency comment - Scheduled limited opening in May 2008 - Limited to 20,000 cubic yards - ICP and Basin Yard Cleanup wastes - Need to construct security fence and gate - Scheduled to acquire additional property between EMF site and Canyon Road in March 2008

22. East Mission Flats Update 60% Design Report - Draft Design Report completion in April 2008 - Begin 90% Design in Summer 2008 - Begin construction of full project in Summer 2009

23. East Mission Flats Update Visual Simulations - Simulations prepared for 7 observation points - Two seasons: Fall (October 2007) Winter (December 2007)

24. Questions? Comments?