USS Rich has been added to the VA’s Brown Water Ships Registry with the following entry: 

USS Rich (DD-820) docked to pier at Da Nang on December 13, 1972

Go to: http://www.bluewaternavy.org/Ship%20List%20Nov25%202014.pdf and scroll down about 2/3 of the way.

With the addition of this listing, any crewmember who served aboard on that date is now conceded as having been exposed to Agent Orange and its related diseases and conditions.

Still working on other dates.