Take a soil sample to your local extension office and tell them your concern and they will know which tests to run other than the usual Ph and fertility stuff. My guess is that you won't really have an issue. You are far enough away that even the road salt shouldn't really be a problem.
If you...
I don't think it's your fault Shady, you have lot's of stuff there I'd like to try. I think it's just reaching the point where everyone has all the seeds they can handle for this year. I know I have about twice as many as I should! lol
Might be time to put the train in the station till next...
As long as the pots are big enough and have good drainage you should be fine. Try to pick up some good mulch or something to mix with the dirt you have. Some peat moss or at least some Miracle Gro potting soil. If you have a nursery close by you could probably get a couple bushels of good mulch...
The markers are beautiful and I have all the concrete in the world but I just can't see me out there writting "Brandywine Pink Sudduth" in concrete. I wouldn't have any room to plant anything! lol
I did find pretty good markers today though. I was going to use popsicle sticks which is what I...
carrots
spinach
herbs
lettuce
peas (now)
beans
beets
All can be sown directly into the garden. I think you are about the same zone as me (5) so you can put your peas in anytime now and you can even try some lettuce, spinach and radishes.