Soil testing in front of the historic Burlingame Train Station began on Friday. Here's what we know so far:
· The drilling company is Pitcher (http://www.pitcherdrilling.com/index.htm )
· They are going down 100’ (Tunnel depth? Certainly trench depth.)
· The soil is almost exclusively alluvium – loose sediment of clay, sand, silt, etc.; basic Bay fill.
· Bedrock is about 300-400’ down
· They were at approximately 70’ as of noon today.
· The water table was about 10’ down
· Asked if alluvium was very stable in an earthquake and was told by the lead guy (the guy with the clip board) that he doesn’t care to comment on that.
