u/Repulsive-Bat6858

Our neighbour's treated wooden fence panel caught on fire yesterday due to a battery left out in their garden in the sun. My raised bed (made of cedar, raised off the floor) was next to the fence panel and it received quite a bit of ash from the fire on top of the soil/plants.
I was wondering how much soil to remove considering the contaminants from the fence panel /fire. It's a 11 inch depth raised bed and so far I've removed all the plants and around 2 inches soil. It hasn't rained yet since the fire. Would you remove any more soil / or even the whole lot?

Thanks