Costco Chief Financial Officer Gary Millerchip said the standalone locations are meant to address two situations: relieving pressure at existing warehouse gas stations that are running at capacity, and serving areas where a gas station cannot be built on the same property as a warehouse. "They're really intended to either alleviate some of the capacity constraints in the gas station that exists at the warehouse today or we just can't get a gas station on the same premises," Millerchip said. He added that the stations remain close enough to a warehouse to provide convenience to its members.