Thank you Kate

- see -I'm not the only nutcase about
Woodnook water runs through a built up area before it gets to the mill site.
Water is best collected at
source from a spring rather than a well.
I may well postpone my welly trecking until Spring.(pun

)
I have looked on Google Earth and seen a few locations worth investigating.
When your technical experts get back with info about chlorine dioxide I will be glad to get it.
I appreciate your efforts on my behalf.
PS my grandson has recently graduated from Edinburgh with a geology degree, but he specialised in.............dinosaurs
