Hi David, Jim Ball has made a couple of changes to the arsenic data. The data for As2O5(cr) have been revised, and native arsenic has been added. Unfortunately, PHREEQC 2.8 does not contain these changes, but here is an updated version for you. David (See attached file: wateq4f.dat) David Parkhurst (dlpark@xxxxxxxx) U.S. Geological Survey Box 25046, MS 413 Denver Federal Center Denver, CO 80225 Project web page: http://wwwbrr.cr.usgs.gov/projects/GWC_coupled
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