Hi Jonathan
The second image shows what looks like some iron (Fe) oxidation.
See below for similar examples:
http://www.southampton.ac.uk/~imw/Beaulieu-River-Estuary.htm - scroll down for images of Fe precipitates and oxidised Fe.
Take a look at the underlying geology to try and identify a natural source.
If you cannot find a natural source then the phenomenon may be indicative of made and/or filled ground.
Kind regards
Ruth
Ruth Willcox
Environmental Protection Officer
Public Protection Service
Plymouth City Council
Civic Centre
Plymouth
PL1 2AA
T +441752304154
E [log in to unmask]
www.plymouth.gov.uk
-----Original Message-----
From: Contaminated Land Management Discussion List [mailto:[log in to unmask]] On Behalf Of Jonathan Welch
Sent: 13 March 2015 09:52
To: [log in to unmask]
Subject: Friday 13th question - not for the squeamish
I have been asked about the identity of a red substance found near a brook by a dog-walker in Northeast England from some photos.
Unfortunately I do not know whether it has seeped up or been dumped, is greasy, sticky or smells, or the pH. Just the photos.
Any ideas but please? Is it worth testing and what would you test for? I'm trying to find a consensus for what action is appropriate to guard public health.
Jonathan Welch
Associate Director
Environment
AECOM
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