Re: tank cars GATX 22909 and HMHX 6012 in 1949
I think I figured out the location of this photo. (a side hobby of mine.) Comparing the caption with some aerial photos from 1940, I believe it's here:
Here it is on Google Maps. https://goo.gl/maps/cqGJPgPLf22FD7Sf9 If it's not honing in, the photographer would be standing just about where the exit for the Acme parking lot at 29 Snyder Ave is, facing NW.