David Rotenstein is correct in his statement that a slaughterhouse will
have a signature similar to a farmyard, because the activities are similar.
A farmyard typically contains a slaughtering activity area, after all.
Apropos David's remarks on sanitation, I'll believe it when I see it. Blood
and offal will be removed, it is true, but if the slaughterhouse has a wood
floor or a dirt floor, you can bet that there will be a chemical footprint
for the slaughterhouse and its disposal areas. So I'd look for a big blob
of the elements that betray animal waste.
 
Phosphates are, indeed, the universal signature element.  Sorry, I misspoke.
 
Chemical surveys have some drawbacks, such as the modifying effect of pH. I
have been working potash lately, and mis-emphasized it. Sorry. We used
potassium to pinpoint a house site recently, with astonishing results.
 
 
 
Ned Heite
Camden, Delaware 19934
Icelandic wool catalogue:  http://www.dmv.com/~iceland
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