Jeff Aley notes:

"It was the same WestVaCo, eventually sold to Food Machinery
Corp (FMC)."

There were, however, two [ at least ] Westvaco companies. As
Jeff says, FMC 
[ a Missouri Corp ] acquired Westvaco Chemical Corp. (chlorine
and caustic 
soda used to produce organic insecticides and pesticides) in 1946.
This 
Westvaco apparently leased the SHPX covered hoppers. To confuse the

situation somewhat, another Westvaco  (originally the Piedmont Pulp and

Paper Company and then The West Virginia Pulp and Paper Company), and then

Westvaco operated an extensive paper [ boxes, etc. ] oriented business and

still does as MeadWestvaco. As far as I am aware, this Westvaco leased no

covered hoppers from SHPX. One has to wonder how many lawyers each Westvaco

kept on staff.

  



Westvaco Chemical Corporation rostered  13 tank cars with the reporting marks WVCX

 in 1950.  



50 and 51 were for storage only and not to be used in interchange.  These were ARA  III and ARAII respectively

52 - 54 ARA III assigned to Westvaco Chemical Corproation Carleret, NJ

811 - 815 ICC 105A for chlorine to 60,000 lbs 

816 - 817 ICC 105A for chlorine to 32,000 lbs 

818 ICC106A  

811 - 818 assigned to South Charleston, WV

 which were assigned to its Charleston WV facility.



There were 6 companies using the name Westvaco Chemical Corporations.  see  http://www.bizapedia.com/us/WESTVACO-CHEMICAL-CORPORATION.html



Rich Orr