PSN-L Email List Message
Subject: Re: low pressure tilt?
From: ian ian@...........
Date: Tue, 11 Mar 2008 07:29:42 +0000
underneath is clay. It's very tough stuff, digging it out was quite hard.
> In a message dated 2008/03/10, ian@........... writes:
>> My sensors are in a double skinned wooden box, surrounding the
>> concrete pad, about a meter cubed,
> Hi Ian,
> What is underneath the concrete pad? This is relatively small
> for a Lehman unless it is on solid rock.
> Chris Chapman
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