These changes made to the disability questions mean that the population identified in 2008 is different from that identified in previous years and the results should not be compared. For a summary of all changes to the ACS 2008 survey see: http://www.census.gov/acs/www/Downloads/SummaryResultsACS2006ContentTest.pdf. Below are the disability questions used in the ACS 2003-7 and those used in the ACS 2008, with descriptions of the major differences between the questions with similar concepts.
Definition of undesirable discharge. : a formal release from military service under conditions other than honorable.
Unregulated discharges from point sources can result in water pollution and unsafe drinking water, and can restrict activities like fishing and swimming. Some of the chemicals discharged by point sources are harmless, but others are toxic to people and wildlife.