Hi HomerJ,
There are a few easy ways to determine the admin account. First you can open the qcsiteadmin_db and within the User_Roles table find all UR_User_ID that belong to Ur_Role_ID = '10' then cross reference those Ur_User_ID against the Users table. The Role_ID 10 is for admin accounts and when you see the accounts that have this role assigned within the Users table you will be able to identify the user that is a siteadmin only as it will have none of the associated LDAP information.
You can also see the following post: http://eyeontesting.com/questions/14104/how-to-identify-which-alm-users-are-site-admin-use.html for running a query within this same DB to reveal the admin users.
Hope this helps,
Dan