From the tool list go to shrink database; File; change shrink to transaction log. before implentation. Go out to network and very the log size. Then go back to EM and shrink log. Again go for verifaction.
Again, I'm working with lots of data. about 290,000,000 records. In the cleanup process backups of the data is most important. After each batch run I shrink the transaction log. With that amount of data soon the log will be as big as the data file. At least that's what I was running into. Please follow the instruction above.