Danielle
You can risk assess many of the sites out. We prepared a risk based screening approach for another authority that considers age, volume and nature of fill and geology amongst other things. So you should not have a blanket requirement, especially with extensions to existing buildings where there is no evidence of any actual risk from gas migration.
Steve Wilson, Technical Director
The Environmental Protection Group Ltd
Tel 07971 277869
www.epg-ltd.co.uk
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-----Original Message-----
From: Contaminated Land Management Discussion List [mailto:[log in to unmask]] On Behalf Of Danielle Newnham
Sent: 16 August 2017 14:49
To: [log in to unmask]
Subject: Ground gas protection
Hi Everyone,
I have a number of former brickworks, in-filled pits/quarries and ponds etc. within my borough, of which the nature of the infill material is unknown. I was wondering, in planning consultations for new builds and extensions within the vicinity of such features, in situations where ground gas is the primary/only potential contaminant of concern, does anyone bypass the requirement for a phased investigation and apply a site-specific condition or informative requesting the incorporation of basic ground gas protection measures? If so, in terms of validation, would you request this be done by a consultant or would you consider a site visit with photographic evidence to be sufficient? Would you request the installation of ground gas protection measures in extensions when it is known that the rest of the property is not protected?
Thanks
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