From Pathfinder #176: Lost Mammoth Valley, which isn't enabled.

Oil Explosion

HAZARD 4

Stealth +12 (trained)

Description The flammable oil catches flame and explodes, burning up in a ball of fire.

Disable DC 25 Survival (trained) or DC 23 Crafting to neutralize the oil without setting it alight

AC 21; Fort +14, Ref +14

Immunities critical hits, precision

Explode

Trigger An open flame is brought into area A4

Effect The oil on the walls explodes, dealing 4d8+10 fire damage to all creatures and objects in areas A4 and A3(DC 21 basic Reflex).

Pathfinder #176: Lost Mammoth ValleyOGL