Considering the assistance provided, isn't it standard protocol to say who you are.... in the e-mails other than a gmail account with no signature?  Academic project, consultant, drilling contractor...    

 

Regards
Nik

 

Mr N Reynolds

BSc(Hons), MSc, CGeol, CSci, FGS, MIEnvSc, EurGeol

Senior Environmental Geologist

 

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From: Contaminated Land Management Discussion List [mailto:[log in to unmask]] On Behalf Of Alex Smiles
Sent: 19 May 2012 13:45
To: [log in to unmask]
Subject: Gas within boulder clay

Hi

We are currently drilling on a site and have encountered a significant pressurised gas ingress.  The ingress occurs at the base of a 5m deep glacial clay layer and the gas in question seems to be h2s

The csm does not indicate the presence of mine workings beneath the site and there is no infilled land or landfill sites within 1000m of the site

The underlying geology is said to be sherwood sandstone and I can see no obvious source for the ingress, although it is evident the confining glacial clay layer is most likely causing it to be pressurised.

I am about to take a reading on the gas monitor using a standpipe we have sealed into the layer however thereafter i am grouting the hole up as the gas is escaping from the tap at a considerable pressure and I am not happy leaving it insitu 

Has anyone ever had a similar experience with glacial till ?

The joys of weekend working!!!