Position on gas station

The word used for identifying pump positions in a gas station

• Pump. e.g., pump 1, pump 2, etc
• Island. e.g., Front-Left island, Front-Middle island; island A, island B.

The word used in a car washing facility is lane. e.g., lane A, lane B.

The word lane is also used for

• bowling alleys
• toll collection gates

I used to work at a petrol station (so I know this one) (us Brits use 'petrol' instead of 'gas' which as the fuel is generally considered a liquid...) and we use 'pump 2' or 'pump number 2'. (we only had 1 car wash and that was pre-paid). Often the customer would come in and drop reference to 'pump' what-so-ever, and would just say '2', or 'number 2'.