1991 Cases with Industry Code "ST" SEWAGE TREATMENT (3%20cases) Case NumberCase TitleOpen DateClosed Date 91-0714-ST-ATASHARON UTILITIES, INC.04/17/199105/09/1991 91-1190-ST-UNCTOLCO UTILITIES, INC.07/01/199106/25/1992 91-1685-ST-COIUTILITY OPERATORS CORPORATION09/12/199103/28/1996