Janet, Go here _http://www.niulib.niu.edu/reghist/RC%20167.htm#scope_ (http://www.niulib.niu.edu/reghist/RC%20167.htm#scope) Here: _http://model-rr.crispen.org/industries/index.php?sb=commodity&rv=y_ (http://model-rr.crispen.org/industries/index.php?sb=commodity&rv=y) Here: _http://www.isgs.uiuc.edu/servs/pubs/pdf-pubs/im117.pdf_ (http://www.isgs.uiuc.edu/servs/pubs/pdf-pubs/im117.pdf) and here is the superfund site - you have to scroll about 2/3 of the way down to see it on the table - it's table 1 - under National Priorities - LaSalle, Matthiessen and Hegele Zinc Mine. _http://www.epa.gov/superfund/sites/npl/f030929.htm_ (http://www.epa.gov/superfund/sites/npl/f030929.htm) Les