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PMA neither loaded nor unloaded ships over the weekend, leaving yard and gate operations up to individual terminals.
Thirteen ships are at anchor in San Pedro Harbor including eight containerships.
Liner carriers in the transpacific say they will begin to impose a $1,000-per-FEU surcharge on Monday.
Sales, hiring and capital expenditures are expected to rise, according to a Business Roundtable survey.
Congressional watchdog agency told Senate lawmakers that FMCSA should enhance its Safety Measurement System for motor carriers.
Containers in stack at Centerm contained trichloroisocyanuric acid, according to the terminal operator.