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Please review the following notes and photos from the site tour, and let me know if you have any questions or comments.

The first stop was to view a ‘slickens’ area (Photo 1) located on the south side of the removal boundary where the vegetation, primarily willows, has been cleared (Photo 2) by the contractor to the planned removal boundary. This is one of the most highly contaminated areas within Phase 1, with high levels of arsenic and zinc to depths up to 5 feet.

Slickens AreaSlickens Area Removal B

After an overview of the site along East Side Road, we stopped towards the center of the site alongside active removal areas to view stream bank reconstruction that was completed in 2012 as a pilot project (Photo 3, 4). The bank reconstruction here represents the Type 3 Bank Treatment, or a double layer vegetative soil lift. At this point the contractor has completed all planned stream bank reconstruction along the east side of the Clark fork River and approximately 1/3 of planned reconstruction along the west side.  The contractor has also constructed a berm (Photo 5) along‐side stream bank reconstruction to protect the areas from adjacent waste removal (Photo 6). These berms will be removed when cap materials are placed.

Stream Bank RebuildWillow Transplants

Berm DividerHaul Truck

Our final stop on the tour was at a natural island in the Clark Fork River where stream bank reconstruction has been completed on both sides of the river (Photo 7) along with creation of micro‐habitat on the island with woody debris and varied topography (Photo 8, 9). Montana DEQ described the micro‐habitat construction as the contractor’s first attempt at creating micro‐habitat and that subsequent efforts would require improvement including further burial of woody debris and less undulation overall.

Island Micro HabitatStream Bank Rebuild

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