Methods and apparatus for processing a substrate are provided herein. In one implementation, the apparatus includes a load lock chamber coupled to a transfer chamber. The transfer chamber is coupled to a thermal process chamber and a substrate is transferred between each of the load lock chamber, the transfer chamber, and the thermal process chamber. In other implementations, a process platform having a load lock chamber, a transfer chamber, and a thermal process chamber is disclosed. Methods of measuring oxygen concentration in a load lock chamber via evacuation of a transfer chamber are also described herein.