How do I Clean goose poop off blacktop?

First, you can relax about the bacteria l- the CDC has determined that it is not harmful to humans. With all cleaning processes, you can use chemicals and/or physical means to remove the dirt. So, first sweep up any loose matter. Then, pour a mixture of white vinegar and water over the area and let it sit for a few minutes. Scrub with a broom and rinse.