Purpose of Meeting

1. Chequamegon National ForestClover and Cabin Lake Sites – Site Investigation Update and Path Forward

2. Purpose of Meeting • Provide a summary of the 2006 and 2007 geophysical work and planned site investigation work for 2007 • Seek input and concurrence on next steps of investigation • Discuss schedule Chequamegon National Forest - Cabin Lake and Clover Sites

3. Geophysical Findings • The extent of metallic debris has been effectively delineated for the purposes of planning site investigation activities at both the Cabin Lake and Clover sites Chequamegon National Forest - Cabin Lake and Clover Sites

4. Cabin Lake Geophysical Findings Chequamegon National Forest - Cabin Lake and Clover Sites

5. Cabin Lake Geophysical Findings Chequamegon National Forest - Cabin Lake and Clover Sites

6. Clover Geophysical Findings Chequamegon National Forest - Cabin Lake and Clover Sites

7. Clover Geophysical Findings Chequamegon National Forest - Cabin Lake and Clover Sites

8. Clover Geophysical Findings Chequamegon National Forest - Cabin Lake and Clover Sites

9. Clover Geophysical Findings Chequamegon National Forest - Cabin Lake and Clover Sites

10. Proposed Site Investigation • General field sampling effort: • Phase I - Geophysical Survey (complete) • Phase II – Soil, Sediment, and Surface Water Sampling • Proposed sampling will be focused on collecting samples at biased locations, based on geophysical results, per Administrative Settlement Agreement and Order on Consent (ASAOC) Chequamegon National Forest - Cabin Lake and Clover Sites

11. Proposed Sampling - Cabin Lake • Sample distribution: • Two soil borings to 20 feet below ground surface • Deep borings proposed in/near the current open area • Samples to be collected at 0-2, 2-4, 6-8, and 18-20 feet below ground surface (bgs) and based on visual results, if necessary • Seven proposed borings to eight feet at positively biased locations • Borings distributed where elevated metallic debris identified • Samples proposed at 0-2, 2-4, and 6-8 feet bgs and based on visual results, if necessary • One proposed surface water sample from Cabin Lake • Two proposed sediment samples in the southern half of Cabin Lake • Two proposed trenches to six feet bgs at anomalous metallic detections north and east of clearing • Trenching proposed to identify nature of debris present • A single soil sample is proposed from a representative location beneath the excavated debris layer in each trench Chequamegon National Forest - Cabin Lake and Clover Sites

12. Proposed Sampling – Cabin Lake Chequamegon National Forest - Cabin Lake and Clover Sites

13. Proposed Sampling - Clover • Sample distribution: • Three soil borings to 20 feet below ground surface • Deep borings proposed in southern and northern blast pits • Samples proposed at 0-2, 2-4, 6-8, and 18-20 feet bgs and based on visual results, if necessary • Eight soil borings to eight feet bgs at positively biased locations • All eight borings proposed in the north valley • Samples proposed at 0-2, 2-4, and 6-8 feet bgs and based on visual results, if necessary • Nine proposed surface soil samples (0–2 feet bgs) at positively biased locations • Two located in surface water infiltration locations • Three distributed in debris field north of former south blast pit • Three distributed on ridge south of former southern blast pit • One at truck parking area • Four proposed trenches to six feet . Two in southern blast pit and two at operator’s station • Trenching proposed to identify nature of debris present • A single soil sample is proposed from a representative location beneath the excavated debris layer in each trench Chequamegon National Forest - Cabin Lake and Clover Sites

14. Proposed Sampling – Clover Chequamegon National Forest - Cabin Lake and Clover Sites

15. Proposed Sampling – Clover Chequamegon National Forest - Cabin Lake and Clover Sites

16. Proposed Laboratory Analyses • All samples collected at each site will be analyzed for Nitroaromatic and nitramine organic compounds and Appendix IX metals • Select samples at both sites will be analyzed for VOCs, SVOCs, and trace elements • One surface soil sample from each geographic area where elevated metallic concentrations identified by geophysical survey • All samples at operator’s station and truck parking area will be analyzed for VOCs and SVOCs Chequamegon National Forest - Cabin Lake and Clover Sites

17. Proposed Schedule • Work Plan and associated documentation submitted by end of June • Field work will begin within 45 days of approval of work plan, waste management plan Chequamegon National Forest - Cabin Lake and Clover Sites