I was just doing this for my own reference initially, but I figured it might be useful to other folks too, and it did come out better than I had initially thought it would. Being able to see a lot of construction floorplans during various jobs I work on helped a lot with this. :)

I tried my best to make sure everything is to scale. The service bays are larger because of the extra equipment they have, so a standard sized car wouldn't fill one up completely.