NORTH COAST UNIFIED AIR QUALITY MANAGEMENT DISTRICT

SECTION 3

AIRBORNE TOXIC CONTROL MEASURE FOR HEXAVALENT CHROMIUM EMISSIONS FROM CHROMATE TREATED COOLING TOWERS

RULE 3-110 - PURPOSE

On January 23, 1986, pursuant to Section 39662 of the Health and Safety Code, the Air Resources Board (ARB) identified hexavalent chromium as a toxic air contaminant for which there is not sufficient available scientific evidence to support identification of a threshold exposure level below which no significant adverse health effects are anticipated (see Title 17, California Code of Regulations, Section 93000). This airborne toxic control measure will reduce hexavalent chromium emissions from chromatic treated cooling towers and cancer incidence to the lowest level achievable through application of best available control technology at operations subject to this measure.