Painters, District Council 30 Pension Fund, St. Charles, Ill., is reviewing the managers of its $60 million in pension plan assets, said Milan Diklich, administrative manager. Plan officials are concerned about the performance of the plans three balanced portfolios, Mr. Diklich said; he declined to name the managers. The review will probably be completed by September, he said. The plans asset allocation is 55% fixed income and 45% equity. Standard Valuations is advising.