The hazardous waste fee is usually a fixed percentage of the repair ticket, regardless of the type of work done. Its too hard to charge specific customers hazardous waste fees based on the work done on their cars, so most dealers around here just tack on an additional percentage on everybody's bills to cover the state and federal permits required, hazardous waste disposal costs, etc.
I don't complain, since I work for the agency that is implementing those environmental rules and forcing those costs on the dealers.
