Not all soil in the city is contaminated, but if your soil is, there are now a number of remediation measures short of hauling the soil away that we can use to remove the contamination.
Who can do this? You can hire someone to do this, but you'll need to check first with the city Health Department or Environmental Services department to see if they require a permit for the work.
What does it cost? That varies, according to what the contaminants are in your soil.
Who can help? Check with your local agricultural extension office.