If a landlord is going to hand the keys over to tenants that has a wood burning fireplace, it's a landlord's responsibility to have a spark arrestor on the chimney. Plus, have the fireplace cleaned regularly. Especially in California.
Fernando thinks he's this big environmentalist but refuses to spend money on items in his control to prevent pollution and or fires.... he throws it in the lap of the tenants, whom are not going to do it. So in essence, Fernando's a polluter of Northern California due to not taking preventative measures to make sure his properties are in order.