After we finished at the Air Base we went to a beach at the north end of Guam just outside of the Air Base. It was a clean beach because it was taken care of by the National Park Service and they asked that you carry out your garbage. It is the cleanest beach we have seen. Park rangers came by on a 4 wheeler to make sure that everyone was keeping the place neat and following the rules.
The Eliason's went with us and snorkeled at this beach.