BI Data Deletion

Hi

We had a BI System with 750GB. We deleted data pertaining to one company code, from the system. After that size of the Database has reduced to 300 GB.

Now I want to strip that 400GB extra from the BI system and redeem it back to my storage area network(SAN).

I searched in this forum, many suggested reorganization is the option. But I don't know how to proceed further.

DB: Oracle 9.2.0.6

OS: HP UX 11.23

Regards

Kasi