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- - - - 2% Damping - <br />------ 5% Damping _ <br />10% Damping <br />1.5 <br />1.0 <br />0.5 <br />1 <br />. <br />fl <br />0.0 <br />)1 0.10 1.00 1(0.( ).00 <br />Period (seconds) <br />SITE SPECIFIC HORIZONTAL RESPONSE SPECTRA <br />Design Basis Earthquake (DBE) <br />10% Probability of Exceedance in 50 Years <br />475-year Average Return Period <br />First American Corporation <br />Santa Ana Data Center <br />011 <br />MACTEC 01 <br />32631 \calculations and analysis\response spectra\spectra_dbe.grf Figure 7 <br />JOB: 4953-03-2631.03 <br />DATE: September 12,2003 F.T.: n/a <br />DR. ck <br />O.E.: ck <br />ClIKI):ck <br />2.0 1 1 1 1 lilli 1 1 1 lilli 1 1 1 1 lili