Could you provide a more distinct description of the area you are referencing? Immediately west of Carteret there was the PRR track called "The Reformatory Branch". You can read our thread discussion regarding this track and the industries served here
http://railroad.net/forums/viewtopic.ph ... =+turnpike
This area has always been industrialized as best as I can tell. No munitions storage. And this area is bounded by Rt 1&9 on the west side as well as the "Glass House" of Rahway/Avenel (Maximum Security Penitentiary).
North of that and you get into the marsh area of the Rahway River around the Tremeley area. There are numerous Storage Tanks leading up to the Bayway facility. Bayway has been there a good long time. I do not think there would have been munitions storage so close to mass fuel storage tanks (too big a security threat from sabotage). West of that is Linden Airport and the old GM auto plant they just tore down. GM used to produce F3F Wildcat fighter planes during the WWII and move the planes across Rt 1 to the airport to test them and fly them off to their intended destinations. Again, more aviation fuel storage so not an ideal location for munitions.
I grew up west of there in Cranford in the '60's & '70's and never heard my father mention any such facility near Carteret (maybe I asked the wrong questions - I will try to get back to him to ask further). The only munitions storage I have been familiar with was Picatinny Arsenal, Raritan Arsenal, in Edison and the Caven Point dock areas where they loaded out (to include the Black Tom facility/LVRR that was blown up due to sabotage).
Other than that, you had munitions manufacturing at the various Hercules plants in Parlin, Kenvil. I thought they had a facility in Perth Amboy too (??)