NY -- Standard&Poor's CreditWire 2/18/98 -- Standard&Poor's today assigned its triple-'A'/'A-1'-plus rating to California Health Facilities Finance Authority's $115 million insured variable rate hospital revenue bonds series 1998A, 1998B, and 1998C, issued for Adventist Health System West, Calif. The long-term rating is based on bond insurance provided by MBIA. The short-term rating is based on a liquidity facility provided by the California State Teachers' Retirement System to cover the purchase price of tendered bonds. The liquidity facility covers principal plus 35 days' interest at the maximum rate of 15% for the bonds. The facility expires on the anniversary date of the bond issuance in 2005 unless extended or earlier terminated according to its terms. Bond proceeds