Normally I wouldn't respond to an anonymous poster, but photgraphic record in "Bells and Whistles in Old Perry" clearly illustrate that neither the standard gauge nor the narrow gauge in Bloomfield had traditional runaround capability in the shared yard.
At the top of page 62, the photo clearly shows that the narrow gauge rail on the center track ended at the road crossing. The narrow gauge track to its left was the elevated transfer track. The dual gauge main track continued east across the road.
On pages 72 ans 73, we see two more photos. At the top right of page 72, the photo clearly shows that the dual gauge siding ends before the switch, and the right hand track, the narrow gauge main, does not include a standard gauge rail. Finally, at the bottom of page 73, the dual gauge main track ends just before a standard gauge switch.
Having spoken with Fred Kramer a couple of times, I am convinced there was no provision for the standard gauge to make a runaround move at this location. Although he was not certain, Mr. Kramer thought he recalled a double-ended standard gauge siding a short distance east of the yard, between it and the enginehouse-shop complex, but he wasn't certain.