Winter photo of salt-scar area. Maximum depth of erosion is about 2 meters. The original soil profile is preserved in the pedestal in the upper right. Saline water seeps to the surface in the middle of the photo and flows to Skiatook Lake.

Pooled oil or tank sludge stored in shallow pits. A pipe exits the pit through the berm. This is the freshest hydrocarbon material at the A-site.

Weathered oil in pit. The pit bottom is of low permeability material.

Salt scar downslope from the two pits. Grasses have partly revegetated the area.

View from the lower part of the salt scar looking south upslope toward the head. Salt releases from the underlying soil and bedrock persist at several sites in the scar, including the white area shown here.

Lower part of the salt scar looking to the lake. Small white patches in the foreground of the picture are salty area. These salts wash into the lake with surface-water runoff.

View of active tank battery. A large pit is just downslope from the tanks and a salt scar extends from the lower edge of the pit to the lake.

Salt-scarred and oil-stained slope above the main tank battery. Grass fires occur regularly in the area. These can damage nonmetal production lines.

Salt scar area below the pit at active tank battery. Salt scar had been remediated and revegetated in the picture. The efforts later failed and erosion started again.

View of a brine tank, injection well, and pit site on the right in the picture. An older tank location is on the left in the picture. Salt scars extend from both sites to the lake.