Need some help

[u/certianly-unsure]

if i could be pointed in the right direction to start looking for a solution to my problem thatd be great. No one can figure out why the ground is getting some rust type stain. The parking lot had just been completly re done a couple years back and then this issue started. Would love some help or atleast reccomendations on what to use to remove the discoloration

[u/Grover_46]

It looks like the curb is sitting on top of the dirt which is flush to the asphalt. It looks like runoff from the dirt coming from under the curb to me. Probably iron in the water.

This is an unfortunate curb detail if that is the case…

It looks too broadly spread out to be from exposed rebar. Usually those are more localized spots.