Cal. VEH § 22406.5

Any person who drives a tank vehicle subject to Division 14.7 (commencing with Section 34000) while transporting more than 500 gallons of flammable liquid at a speed greater than the applicable speed limit or in willful or wanton disregard for the safety of persons or property is, in addition to any other applicable penalty, subject to a fine of not less than five hundred dollars ($500) for a first offense and, for a second or subsequent offense within two years of a prior offense, to a fine of not less than two thousand dollars ($2,000) and a suspension of up to six months of a hazardous materials or cargo tank endorsement, or both.