I would disagree with using Munsell colour charts as the choice of the colours is somewhat subjective and not helpful to contamination assessment. Deciding which of the 325 colours in the charts takes a lot of time for limited or no benefit. The cost of these charts is relatively high for what I believe is a hindrance to people doing soil description. Who knows what" Gley 8/5G" means and what difference is that to "Gley 6/10Y" or "5YR 5/8"? I recommend just sticking to the colours in BS5930:2015 (plus cream and orange) as there are plenty to choose from. If you want a colour chart use the colour chart on David Norbury's Website which are the Pantone colours used by professional printers, see
http://drnorbury.co.uk/wp-content/uploads/2015/08/Colour-Chart.pdf
Colours can be indicative of contamination but most of the time there is no link from colour to contaminants other than the relatively common hydrocarbon contamination or if you are in Widnes (and parts of Glasgow etc) the cream and yellowish brown colours can be Galligu. Bright colours and unusual colours can be indicators of contamination so you can add another sentence after the main description to add additional information if you think it is helpful. Unusual colours observed are usually not indicative of a specific contaminant as there is often a cocktail of different natural materials and anthropogenic materials present.
Oh, "Gley 6/10Y" is known to me as "grey" and "5YR 5/8" is "orangish brown."
Regards
Chris Eccles
Director
TerraConsult Ltd
01925 291111
-----Original Message-----
From: Contaminated Land Management Discussion List [mailto:[log in to unmask]] On Behalf Of Philip Wilson
Sent: 09 July 2018 16:11
To: [log in to unmask]
Subject: Re: Soil colours
Use a Munsell colour chart to avoid ambiguity ??
http://drnorbury.co.uk/soil-and-rock-description-in-engineering-practice/field-guidance-tables-for-soil-and-rock-description
Phil Wilson
Phil Wilson Bsc CEng FICE
Head of Geotechnics & Geo- Environmental
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-----Original Message-----
From: Contaminated Land Management Discussion List [mailto:[log in to unmask]] On Behalf Of Sophia Norfolk
Sent: 05 July 2018 12:55
To: [log in to unmask]
Subject: Soil colours
Dear all,
Thank you to those who have recently taken part in my questionnaire - the results are very interesting!
I've been working through some of the questions and many of you have said that describing colour is difficult during logging. As part of my research to standardise colours, I have been researching different colours that can be present within soils. If anyone has encountered interesting or unnatural colours within soils during a ground investigation due to contamination or other sources and knows what has caused the colour, I'd be very interested in including it in my project. Any pictures you have will also be very helpful.
Kind regards,
Sophia
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