Hand holding a pressure washer aimed at an outdoor bench Category: Cleanup Guidance If you manage a property or an HOA, it helps to know where the cleanup guidance comes from. These public sources cover ash, wet cleaning, and runoff: LA County Department of Public Health: FAQs for properties just outside burned areas, guidance for nearby businesses, and a general FAQ page. The theme: wet methods, no dry sweeping or leaf blowers, bag the ash, and never wash it into storm drain