Authorities took the chemical to a parking lot on Seawall Drive near the Berkeley Marina, where explosive ordnance disposal technicians destroyed it. He described the amount of picric acid found at the home as being equivalent to a pipe bomb. Police secured the Seawall Drive parking lot and the bomb techs blew up the picric acid “through a controlled detonation,” White wrote. Safety agencies generally recommend using fume hoods when working with picric acid, but it is unclear if there are any noxious fumes associated with its detonation. Emergency workers reopened the parking lot at the marina shortly before 3 p.m.; around 4:30 p.m., they lifted the shelter order in Thousand Oaks.