They tell you that they will call you, but, most likely will not. However, if you contact them too often asking about the job, they won't hire you either, so it's all about finding a balance and being proactive. Years ago, they had a math test in the application which you had to pass in order to get hired. Also, you had to be able to lift a certain amount of weight to get hired. You may be able to negotiate your pay based on experience.
If you get the job, be prepared to work most, if not all, weekends. Also, the hours can vary - one week you're coming in as early as 4 AM and the next you're leaving around midnight. Sometimes, depending on your availability, you'll have an early and a ate shift one after the other with only an 8 hour turn-around.