09-25-2020, 08:09 PM
Terracore, www.caves.org probably has the most complete information & I have linked most of the referenced info above.
Here is a 2003 article on sewage testing that has a rudimentary map:
https://caves.org/pub/journal/PDF/V65/v6...lliday.pdf
Here is a 2003 article on sewage testing that has a rudimentary map:
https://caves.org/pub/journal/PDF/V65/v6...lliday.pdf