Some agencies use BSSA or another code system with some variations specific to their department. I wish there was a standard, or they would just get rid of them. Grove City uses the Columbus system with some variations. When I worked in Hamilton County there were 5 different code systems in use, but the individual use was minimal, such as 3-5 on the scene, 2-6 in service, 44 advise location etc. They were nowhere near as extreme as Columbus.