The 1st set of images I posted were hurried screen captures to get the info out asap. The following images are larger and possibly a little more explanatory.
The original PDF file posted early Wednesday morning on 4/27/11:
The original PDF file, showing just the top layer:
The original PDF file, showing just the background layer:
By releasing the clipping mask that the person who created the BC documented placed, I can simply drag the entire top portion away from the background.