You need to find what query is running that is causing the massive growth.
Here is an article with a technique that could be applied...
http://www.sqlservercentral.com/articles/Log+growth/69476/
Jason...AKA CirqueDeSQLeil
_______________________________________________
I have given a name to my pain...MCM SQL Server, MVP
SQL RNNR
Posting Performance Based Questions - Gail Shaw[/url]
Learn Extended Events