U.S. Nuclear Regulatory Commission, Division of Contracts, Attn: RoseMary Mann, Mail Stop TWF-7I2, Washington, D.C. 20555

A -- OPERATION OF THE GARNER VALLEY DOWNHOLE SEISMOGRAPHIC ARRAY AND ANALYSIS OF THE RECORDED DATA POC Mary H. Mace, Contracting Officer, 301/415-7314, RoseMary Mann, Contract Specialist, 301/415-6595 The Nuclear Regulatory Commission (NRC) intends to negotiate a sole source contract with the University of California-Santa Barbara (UCSB) for the continuation of the following work at the Garner Valley Downhole Seismographic Array (GVDSA) site in southern California: 1) Record strong ground motion data from a shallow soil column site in a seismically active area; 2) determine the attenuation characteristics of the recorded data. Compare these characteristicswith those assumed to predict the strong ground motion at the Garner Valley siteand 3) assess the validity of the two competing hypotheses for the high frequencyshape of earthquake ground motion spectra using the recorded data. The period ofperformance is for three years with a one year option year. Interested respondents should submit their written capability statement to the address shownabove. Telephonic responses will not be considered. Responses providing insufficient information for evaluation will also not be considered. See Note 22. (0170)

Loren Data Corp. http://www.ld.com (SYN# 0005 19950620\A-0005.SOL)