SMOG Test Station. A.B.C. Smog & Test Only (State Official Smog Test Only) in Fremont opened in 2004. We have always focused on helping our clients with all smog check and smog test needs. It is our goal to provide the best possible customer service to our clients during their visits to our locations. We take every opportunity to provide our clients with the knowledge necessary in order to keep their vehicles running as clean as possible!