Mash water back flowed into sparge water-chloromine

Ok. I brewed yesterday during a nice storm. I made a mistake. I always treat my hlt with Campden. What happened was that as I was transferring mash out water to my mash tun via pump I shut off the pump and forgot to close the valve. I had treated all water involved. But I had a small amount of mash water back flow into my water tank. It was a small amount. The brew was an alt. it turned the water in the halt to a very light yellow, just barely noticeable. No grain pieces etc.

Unfortunately, I then topped this water in the water tank off with tap water, then treated with Campden before the sparge. Am I going to get chlorophenols from the small amount if wort that got into my water tank? Thanks.