I am reaching out about the same thing below. I am also in Greenwood Gardens, and the streets look terrible! It has rained several times and the marks didn't budge. Someone thought maybe hydraulic fluid? I don't know, but it needs to be taken care of. It is on many of the side streets(listed below) It was either the street sweeper or a trash truck that I am assuming created this MESS! Thanks so much for your consideration! Please respond so we can update neighbors, as they are al