The station owner will not likely have any access to credit card numbers from the transaction. If he has anything, it’ll be hashed numbers (a string of x’es with only the last 3 or 4 digits.
It’s a common security precaution that protects both the customer and the merchant.
Nope, sorry, I run a merchant account as treasurer of a non-profit organization, and the full card number, CVV code if entered, and expiration date is available for review on my transaction records. The string of Xs on the receipt is to prevent someone who picks that receipt out of the trash from making a bunch of mail-order or online purchases.