Matlack was just poor management,was heavy in debt when it folded, was privately owned by the Rollins family out of Delaware, remember Rollins truck leasing, same people, also was union, Superior took over most of it.
Chemical Leaman (union) and Montgomery tank lines, merged to form Quality Carriers, to get rid of the union, and have been in the red since they started, now owned by the Appolo group, an investment firm in Tampa, and still in the red.
Manfredi Motor Transit is now Dist Tech don't think there was any union involved.