This is a car wash, mainly used by employee's at the Kinleith Mill to rinse thier cars to wash off any fall out from the stacks that may have deposited while they are at work.
The co-ordinates will take you to the cache, If you have two people one could be putting the car through the wash while the other person is looking for the cache. The cache is a 200ml sistema container with log and pencil. FIRST TO FIND: jillymc and quinella