Christiana Fire Company (New Castle County, Delaware) Squad 12. Squad 12 is this 2016 Pierce Arrow XT. It is equipped with a Detroit DD13 500HP motor, a Waterous 1500GPM pump, and a 750-gallon water Tank. Squad 12 formerly ran as Engine 12. Squad 12 is now used as a back fill engine or runs as second due when staffed out of station 12. Squad units in New Castle County are engines adequately equipped to handle MVCs, usually ran as second out engines or mutual aide piece.