I was a Crew Chief also at Naha 69-71 with 374th TAW. I did spend some time in Thailand, but most of my TDY's were at Cam Ranh Bay. I was diagnosed with AL Amyliodosis in 2008. The VA has regonized this desease, certain cancers and other health problems as presumptive diseases associated with exposure to Agent Orange or other herbicides during military service. I recomend that you use your County Veterans Service Office or Vietnam Veterans of America as your advocate. I am now recieving 100% compensation. Most of these claims are taking 18 months to two years to be resolved. Good luck and tell Ben, "Welcome Home".
Also this may help. http://www.veteran.com/content/agent-orange-thailand VA Compensation & Pension Service Bulletin May 2010
After reviewing documents related to herbicide use in Vietnam and Thailand, C&P Service has determined that there was significant use of herbicides on the fenced in perimeters of military bases in Thailand intended to eliminate vegetation and ground cover for base security purposes. Evidence of this can be found in a declassified Vietnam era Department of Defense (DoD) document titled Project CHECO Southeast Asia Report: Base Defense in Thailand. Therefore, when herbicide related claims from Veterans with Thailand service are received, RO personnel should now evaluate the treatment and personnel records to determine whether the Veterans service activities involved duty on or near the perimeter of the military base where the Veteran was stationed.
The majority of troops in Thailand during the Vietnam era were stationed at the Royal Thai Air Force Bases of U-Tapao, Ubon, Nakhon Phanom, Udorn, Takhli, Korat, and Don Muang. If a US Air Force Veteran served on one of these air bases as a security policeman, security patrol dog handler, member of a security police squadron, or otherwise served near the air base perimeter, as shown by MOS (military occupational specialty), performance evaluations, or other credible evidence, then herbicide exposure should be acknowledged on a facts found or direct basis. However, this applies only during the Vietnam era, from February 28, 1961 to May 7, 1975.
Also troops were used as an augmentee for guard and perimeter patrol duty on the fenceline at near the airfield.