NY -- Standard&Poor's CreditWire 4/29/98 – Standard&Poor's today assigned its single-'A'-plus rating to California Health Facilities Finance Authority's insured hospital revenue bonds series 1998A dated April 1, 1998 due Nov. 1, 2012, issued for Marshall Hospital. Marshall Hospital is a 103-bed acute-care hospital located in Placerville, Calif. Proceeds will be used to finance a portion of the costs related to the construction of a two-story medical office building and for other capital projects at the hospital. Security for this issue is based on the state of California's Health Facilities Construction Loan Insurance Program. In the event of a default, the state can continue to make regularly scheduled debt service payments, or issue debentures to the trustee