Loss for West Coast Bancorp

West Coast Bancorp, the Newport Beach bank holding company, posted a loss of $1.4 million, or 16 cents a share, for the first quarter. That contrasted with earnings of $95,000, or 1 cent a share, for the first quarter of 1992. The company said the 1993 loss resulted from lower net interest income, primarily because of lower loan volumes, and losses associated with loans and real estate. Assets as of March 31 were $347.3 million, 20% less than the $435.7 million recorded a year earlier.