Deputies said the couple appeared to be extracting oil from marijuana.
This is the process Charlotte's Web marijuana will undergo to extract the oil.
Links
[1] http://www.local10.com/news/boca-raton-homes-evacuated-roads-closed-after-possible-explosion/25830500
[2] http://rethinkpot.org/tags/grow-sites
[3] http://rethinkpot.org/tags/explosion
[4] http://rethinkpot.org/tags/florida