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819 Striker Avenue Suite S <br /> Sequoia Sacramento CA 95834 <br /> (916)921 shoo <br /> FAX(916)921-0 100 <br /> Analytical www sequoialabs coin <br /> Gettler-Rvan-Rancho Cordova Project Unocal 0123 Tracy CA <br /> 3164 Gold Camp Dr Ste 240 Project Number N/A Reported <br /> Rancho Cordova CA 95670 Project Manager David Herzog 12/04/00 13 58 <br /> Total Metals by EPA 6000/7000 Series Methods - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spoke Source %REC RPD <br /> Anafv[e Result Limit Units Level Result 16REC Limits RPD Limit Notes <br /> Batch 0110361 - EPA 3050E <br /> Blank(0110361-BLK1) Prepared 11/29/00 Analyzed 11/30/00 <br /> Lead ND 250 mg/kg <br /> i <br /> LCS(0110361-B51) Prepared 11/29/00 Analyzed 11/30/00 _ <br /> Lead 468 250 mg/kg 500 936 80-120 <br /> Matrix Spike(0110361-MS1) Source 5011338-01 Prepared 11/29/00 Analvzed 11/30/00 <br /> Lead 43 5 100 mg/kg 500 ND 870 80-120 <br /> Matrix Spike D_up(0110361-MSDI) Source S011338-01 Prepared 11/29/00 Analyzed 11/30/00 <br /> Lead 433 100 mg/kg 500 ND 866 80-120 0 461 20 <br /> I <br /> I <br /> I <br />• <br /> Sequoia Analytical- Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document 7'hrs analytical report must be reproduced in its entirety <br /> Page 12 of 15 <br />