Elected officials are demanding swift action and increased oversight at the Port of Los Angeles following disclosure that a second major shipping company has been allowed to skirt requirements to reduce harmful diesel emissions.

Port officials failed to require two large terminal operators, TraPac and China Shipping, to comply with air quality improvement measures the city adopted years ago, including mandates that massive cargo ships shut down their diesel engines and plug into shore-based electricity while at the docks.

TraPac’s failure to meet the requirement is “a huge breach of faith,” said U.S. Rep.Janice Hahn (D-Los Angeles), who as an L.A. City Council member helped negotiate the shore power requirement as a condition for allowing TraPac to expand operations at the city-owned port in 2009.

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