Remediating Creosote Logs in the Garden?

I am looking for information on remediation of creosote logs in the garden. I am curious about plugging the logs with oyster mushrooms for remediation. The raised beds with the logs are not being used for food cultivation.

I would like to remediate them on the spot rather than take them to the dump. Any ideas, info or links would be most appreciated. Thanks.

Hardiness Zone: 8b

By Nikki from Portland, OR