Bill Proestler, who owns 5 Star Car Wash and Detail Centers in Vacaville and Fairfield, has about 70 workers. His extra federal unemployment insurance tax bill for 2017 comes to $10,564. Bill Proestler, who owns 5 Star Car Wash and Detail Centers in Vacaville and Fairfield, has about 70 workers. His extra federal unemployment insurance tax bill for 2017 comes to $10,564. Cole Gomez cleans the area after washing a car at the 5 Star Car Wash and Detail Center in Fairfield.