Use the link to send them a message requesting deletion.
For more information, also see: http://help.zinch.com/entries/414799-how-do-i-delete-my-account
If you have an account and you don’t want your profile to be found in Google, go to the “Settings” page and say that you do NOT want your profile to come up on search engines.
Finally, about data retention: “If you cancel your Zinch.com account, all your Zinch Account Information will be deleted from Zinch.com, but will be maintained in our database. However, if you remove your profile from Zinch.com, colleges, universities and Third Parties who have gained access to the data previously may have already saved a copy of your Zinch Profile.”
URLS:
http://www.zinch.com
http://help.zinch.com/anonymous_requests/new