Services Bureau Contracts & Monitoring Fiscal Services Fleet Management Human Resources Information Systems Facilities Services Bureau DPSS Offices (Department of Public Social Services) Dispatch Center and Communications Parks Services Bureau Belvedere Station (East Los Angeles) South Station (South Los Angeles) Whittier Narrows Station (South El Monte) Quartz Hill Substation (Quartz Hills) Castaic Station (Castaic Lake) Bonelli Station (Bonelli Regional Park) Health Services Bureau Los Angeles County-USC Medical Center Harbor-UCLA Medical Center King/Drew Medical Center & Rancho Los Amigos National Rehabilitation Center Olive View Medical Center OPS did not have its own custody facilities and as a result, booked people arrested at one of several L.A. County Sheriff's stations throughout the county. Almost all county police stations were part of a larger structure belonging to a county department that contracts for their services. OPS fielded several specialized units, including SPU (Special Problems Unit), DPU (Dignitary Protection Unit, Labor Relations, Internal Affairs, Background Investigations, Canine, Boat, TRF (Tactical Response Force), WMD (Weapons of Mass Destruction), and a reserve Mounted Unit. The WMD trained and prepared for the inevitable chaos at county medical facilities in the event of a terrorist attack. TRF officers trained and prepared for civil disturbances and crowd control. Both were part-time, on-call units which depend on officers in other full-time assignments to fill their ranks. Requirements to become an OPS Officer County police recruits were to have been 20 years and six months old at the time of hire. They had to possess a high school diploma or GED, a California driver's license, and pass all phases of the selection process, consisting of: a written exam, an oral interview, a background investigation (including a polygraph exam), and medical and psychological exams. County police officers and public safety dispatchers were required to have and maintain a valid POST Certificate, which substantiates that their character, education, training, and experience are up to California State standards. See also List of law enforcement agencies in California Department of Public Safety County police References Public Safety Defunct law enforcement agencies of California