NY -- Standard&Poor's CreditWire 5/20/98 – Standard&Poor's today assigned its single-'A'-plus rating to California Health Facilities Financing Authority's $46.155 million bonds series 1998A dated May 1, 1998 due Aug. 1, 2020, issued by for Casa de las Campanas. Casa de las Campanas is a 501(c)(3) corporation that owns and operates a continuing care retirement community in Rancho Bernardo, near San Diego, Calif. Bond proceeds will be used to refund series 1990 bonds. Security for this issue is based on 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 for the benefit of the bond owners,