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Arizona authorities closed a portion of a freeway and issued a shelter-in-place order in the surrounding areas after a commercial truck tanker rolled over on the freeway and spilled nitric acid on Tuesday.
“Exposure to nitric acid can cause irritation to the eyes, skin, and mucous membrane; it can also cause delayed pulmonary edema, pneumonitis, bronchitis, and dental erosion,” according to the National Institute for Occupational Safety and Health. “Nitric acid is highly corrosive. Workers may be harmed from exposure to nitric acid.”
(b) The required placarding of the front of a motor vehicle may be on the front of a truck-tractor instead of or in addition to the placarding on the front of the cargo body to which a truck-tractor is attached.