1090 seems to be a test and demonstration TG. It has been active a long time with various users and system techs heard in the past. Radio just active has alias "Demo 1".
TG720 appears to be a quarry or gravel pit. Units aliases are "Cat 972M" (excavator), "Cat 730AC" (haul truck) and various Truck#s. I am attempting to pin down who it may be.