Limiting Quantities Another way to limit the dangers of hazardous materials is to limit the quantity present in containers or in transport. For example, one may carry very small quantities of certain materials on passenger aircraft. Regulations permit larger amounts on cargo aircraft and even greater amounts by rail, truck, or water vessels. Fines for violations can be large. Consider a case in which an employee of a chemical company carried a small container of nitric acid in his luggage. The acid spilled and damaged the aircraft baggage compartment. The company was fined $15,000.