On any given day there are about 15 (6 at Santa Monica) BLS 24hour ambulances and 3 ALS 24hour ambulance. In addition there are about 4-7 BLS day cars (9, 10, or 10 1/2 hour shifts) depending on the day. The pay works like this. On 24's it is based of a 40 hour work week. Since you normally work 3 24's you get 40 hours base pay ($8.54) and 32 hours OT ($12.81). Day cars work as hours 0-8 are base pay hours 8-12 are OT and hours 12 and up are double time.