Water Storage Tanks installed for the purpose of water storage for fire protection when required by the California Fire Code and California Building Code, shall meet the standards of NFPA 22, The Standard for Water Tanks for Private Fire Protection.
When the water tank is used in relation with a fire pump, commercial fire line underground or fire suppression system. The following NFPA Standards shall apply NFPA 22, NFPA 20, and NFPA 13 shall apply.
All water tanks shall be permitted through Sonoma County Building Department and Sonoma County Fire regardless of use when over 5000 gallons in size.
All Tanks 5000 gallons or greater must be on a concrete foundation Per NFPA 22, Section 12.2 and Sonoma County Building Department Requirements..