Once the aircraft carrier reached port, the MQF was flown to Houston, and the crew served the remainder of the 21 days of quarantine in the Lunar Receiving Laboratory at the Manned Spacecraft Center.
[1] In June of 1967, NASA awarded contract to design and build the four MQF's to Melpar, Inc., of Falls Church, Virginia.
The Apollo 11 crew also used this equipment to speak with President Nixon, who personally welcomed them back to Earth in July 1969 aboard the recovery ship USS Hornet after splashdown.
The trailers housed the three crew as well as a physician, William Carpentier, and an engineer, John Hirasaki, who ran the MQF and powered down the command module.
Four MQFs were built for NASA: The quarantine requirement was eliminated following Apollo 14 once it was proven the Moon was sterile and that the facilities were therefore unnecessary.