and other openings as shown in photo`s below.

-Frozen Ground Can Direct Escaped Gas to Homes http://wcco.com/consumer/escaped.gas.frost.2.1517844.html

...'if a house happens to be in the path it will go into the cracks of the house'

...'the gas made it`s way into the home through cracks or ANY openings in BASEMENT WALLS where the gas goes up against the wall'

...'the migrating gas made it`s way into the unoccupied home turning the basement into a ticking time bomb'

-Two Girls Die in Possible Pesticide Exposure ....'investigators believe the fumes found their way into the Toone home through tiny cracks where the foundation meets the building' http://www.clippertoday.com/view/full_story/6054158/article-Two-girls-die-in-possible-pesticide-exposure?instance=secondary_stories_left_column

-Exterior cracks and other openings

http://picasaweb.google.com/101049034584960315932/BasementWaterproofing10#5442193294073286418

http://picasaweb.google.com/101049034584960315932/BasementWaterproofing14#5442290230325249010