OCCR is a local company in Santa Ana offering full service in-house Hydrostatic Cylinder Testing. We specialize in DOT authorized cylinder requalification in accordance with Federal and State regulations. Our goal is to provide prompt and quality service that is both convenient and affordable. Our technicians are DOT certified by the US Government and are also held to stringent company standards that promote safety and quality control. You can rest assured that when you hand over your tanks to OCCR, you are enlisting trusted professionals who can get the job done right.