Two large air tankers were activated on June 9 on Call When Needed (CWN) contracts. The administrative base for Tanker 102, an MD-87, will be San Bernardino, California. For Tanker 12, a BAe-146, it will be Redding, California. These are guaranteed 90-day contracts, not the typical CWN arrangement when they can work a few days and then be sent home.
The aircraft may or may not spend any significant amount of time at those bases; it just designates who is responsible for keeping track of their paperwork.
More large air tankers will be brought on later this month using the same guaranteed 90-day contract process.
Two other tankers were activated at the end of May, T-104 (MD-87) and T-137 (B-737).
These 4 CWN tankers added to the 13 on exclusive use contracts brings the temporary total up to 17. It is unknown when the four CWN ships will be let go.