The 29-year-old TV personality had her husband leave the Tarzana, California mansion they shared in August this year following alleged cheating and drug addiction problems, after he was accused of using of pain reliever Oxycontin and crack cocaine.
She made sure her home was searched to ensure she would not be implicated in any drug related crime.
According to RadarOnline.com: ''Khloe hired a professional to do a sweep of the palatial estate after booting Lamar from the premises.
''She did this because Khloe didn't want cops to show up with a search warrant and find drugs in the house, because she could be arrested as an accessory.''
Khloe was also weary of leaving any substances in her house in case the basketball star relapses after potentially moving back into their home.
The source explained: ''Secondly, in case Lamar were to move back in, she didn't want him to go looking for the drugs and using again. There is zero tolerance for drugs by Khloe. She hates it, it has never been her thing and she didn't want it in her house.''
The property is ''now free and clear'' and the 'Keeping Up With The Kardashians' star does not have anything to be ''concerned about.''