An Animal Control Officer upon impounding an animal shall make a complete record, entering the description of each animal. If the owner of the animal is known or if the animal is identifiable by license or other identification, the shelter officer shall attempt to notify the owner within 48 hours by service or posting of notice that his/her animal has been impounded and where it may be redeemed. The reading of a license tag or the scanning for a microchip shall constitute reasonable attempts to identify the animal. The County or animal shelter shall not be liable for the failure of a scanner to detect the presence of a microchip.