2025-01-13 00:00:00 The Williams Fire & Hazard Control Mobile App provides first responders with vital calculations needed in support of fire response efforts. Calculations include critical application rates for delivery of foam concentrates when addressing spill fires and fuels in depth, friction loss associated with handlines and large diameter hoses (LDH), and flow characteristics of end-of-line devices, including K-factor, required pressure, and flow.