My question involves expungements or pardons for the state of: Washington

I was charged with second degree trespassing and received a deferred sentence for 12 months. After the deferred sentence the charges were dismissed. I had to originally plead guilty to the charge in order to receive the deferred sentence. Problem is not that the criminal record shows guilty and dismissed. Is there any way to get this cleaned up to only show dismissed or to get it fully expunged. The charge was in 2007.