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PMA neither loaded nor unloaded ships over the weekend, leaving yard and gate operations up to individual terminals.
Draymen say they could be forced out of business by huge demurrage and detention bills.
Liner carriers in the transpacific say they will begin to impose a $1,000-per-FEU surcharge on Monday.
The port authority saw a 4.9% drop in profits due to higher interest charges and depreciation.
The logistics provider and freight forwarder doubled EBIT and increased profits by more than 600% in 2014.
Containers in stack at Centerm contained trichloroisocyanuric acid, according to the terminal operator.