Find possible radon entry routes

Directions:
Look at the diagram of the house and find the correct entry route for each letter. Write the number on the line provided.

A. _____	1. Loose fitting pipe penetrations
B. _____	2. Pores and cracks in concrete blocks
C. _____	3. Building materials such as some rock
D. _____	4. Open tops of block walls
E. _____	5. Spaces behind brick veneer walls that rest on uncapped hollow block foundation
F. _____	6. Weeping (drain) tile, if drained to open sump
G. _____	7. Cracks in concrete slabs
H. _____	8. Exposed soil, as in a sump
I. _____	9. Mortar joints
J. _____	10. Floor-wall joints
K. ____	11. Water (from some wells)