Except as noted herein, Section 202 is adopted in full. The following definitions are amended or added to Section 202 of the California Fire Code to read as follows:
3D PRINTER. A machine used in the additive manufacturing process for fabricating objects through the deposition of a material using a print head, nozzle, or another printer technology.
ADDITIVE MANUFACTURING. A process of joining materials to make objects from 3D model data, usually layer upon layer, sometimes referred to as 3D printing.
The Code recognizes two types of additive manufacturing:
1. Industrial additive manufacturing. 3D printing operations that typically utilize combustible powders or metals, an inert gas supply, a combustible dust collection system, or that create a hazardous (classified) location area or zone outside of the equipment.
2. Non-industrial additive manufacturing. 3D printing operations that do not create a hazardous (classified) location area outside of the equipment, and do not utilize an inert gas supply or a combustible dust collection system.
CORROSIVE LIQUID. Corrosive liquid is:
1) any liquid which, when in contact with living tissue, will cause destruction or irreversible alteration of such tissue by chemical action; or
2) any liquid having a pH of 2 or less or 12.5 or more; or
3) any liquid classified as corrosive by the U.S. Department of Transportation; or
4) any material exhibiting the characteristics of corrosivity in accordance with Title 22, California Code of Regulations §66261.22.
FALSE ALARM. The willful, knowing, or negligent initiation or transmission of a signal, message, or other notification of an event of fire when no such danger exists.
MAXIMUM THRESHOLD QUANTITY (MAX TQ). Maximum threshold quantity is the maximum quantity of a moderately toxic or toxic gas, which may be stored in a single vessel before a more stringent category of regulation is applied. The following equation shall be used to calculate the Max TQ:
Max TQ (pounds) = LC50 (ppm) x 2 lb.
MODERATELY TOXIC GAS. A moderately toxic gas is a chemical or substance that has a median lethal concentration (LC50) in air more than 2000 parts per million but not more than 5000 parts per million by volume of gas or vapor, when administered by continuous inhalation for an hour, or less if death occurs within one hour, to albino rats weighing between 200 and 300 grams each.
OTHER HEALTH HAZARD MATERIAL. Other health hazard material is a hazardous material which affects target organs of the body, including but not limited to, those materials which produce liver damage, kidney damage, damage to the nervous system, act on the blood to decrease hemoglobin function, deprive the body tissue of oxygen or affect reproductive capabilities, including mutations (chromosomal damage), sensitizers or teratogens (effect on fetuses), carcinogens, and irritants.
SECONDARY CONTAINMENT. Secondary containment is that level of containment that is external to and separate from primary containment and is capable of safely and securely containing the material, without discharge, for a period of time reasonably necessary to ensure detection and remedy of the primary containment failure.
SPILL CONTROL. Spill control is that level of containment that is external to and separate from the primary containment and is capable of safely and securely containing the contents of the largest container and prevents the materials from spreading to other parts of the room.
WILDLAND-URBAN INTERFACE FIRE AREA. Wildland-urban interface fire area is a geographical area identified by the State of California as a "Fire Hazard Severity Zone" in accordance with Public Resources Code Sections 4201 through 4202 and Government Code Sections 51175 through 51189, or other areas designated by the enforcing agency to be at a significant risk from wildfires. Within the city limits of the City of Palo Alto, "Wildland-Urban Fire Interface Area" shall also include all areas west of Interstate 280, and all other areas recommended as a "Very High Fire Hazard Severity Zone" by the Director of the California Department of Forestry.
WORKSTATION. A workstation is a defined space or independent principal piece of equipment using hazardous materials with a hazard rating of 1.
(Ord. 5563 § 1 (part), 2022)