Volatile organic solvents are used in the vehicle repair industry for removing oil, grime, and grease from work surfaces, and commercially available, disposable aerosol spray cans are the most popular solvent delivery system. In fiscal year 1997, 12,413 metric tons of aerosol cleaning products were sold in California.(10) These consisted of 4258 metric tons of brake cleaner, 4924 metric tons of engine degreaser, and 3231 metric tons of carburetor cleaner.