Version History Water-Resources Investigations Report 01-4186 ------------------------------------------ Version 1.0 posted February 2002 at http://nwql.usgs.gov/Public/pubs/WRIR01-4186.html ------------------------------------------ Version 1.1 posted October 2007 Revision date was added pg 20 - Table 2 was updated - AHTN and HHCB compound names were switched pg 26 - Table 3 was updated - The data for AHTN and HHCB were switched pg 27 & 28 - Table 4 was updated - The data for AHTN and HHCB were switched pg 31 - Table 5 was updated - The data for AHTN and HHCB were switched A statement discussing the changes for AHTN and HHCB was added to the web page ------------------------------------------