LABOR

Amoco, Union Reach Tentative Accord: The pact negotiated by the Oil, Chemical and Atomic Workers International Union and Amoco Corp. would cover 30,000 Amoco employees. Agreements between the energy firm and the union traditionally become a model for contracts at other U.S. refineries and chemical plants. Its terms were not disclosed. Union officials said they were able to secure higher wages and improved job security--provisions that had been sticking points in the protracted talks. The action averts a strike by petroleum workers across the country. Chicago-based Amoco said the pact would cover workers at its five domestic refineries. The workers are expected to vote over the next several days.