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85 Jarvis Drive <br /> Sequoia Morgan It11 CA 95037 <br /> (408)776 9600 <br /> Analytical FAX(408)7826308 <br /> 0 www sequoialabs com <br /> URS Corporation[Arco 11 Project ARCO#5469,Stockton,CA MOF0335 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number G091Z-0290 Reported <br /> Sacramento CA,95833 Project Manager Jay Johnson 06/23/05 15 34 <br /> Total Metals by EPA 200 Series Methods - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> ��3te Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 5F14013-EPA 3005A/EPA 200 7 <br /> Blank(5F14013-BLKI) Prepared 06/14/05 Analyzed 06/15/05 <br /> Iron ND 100 ug/1 <br /> Laboratory Control Sample(5F14013-BS1) Prepared 06/14/05 Analyzed 06/15/05 <br /> Iron 1050 100 ug/I 1000 105 85-115 <br /> Matrix Spike(5F14013-MSI) Source MOF0335-04 Prepared 06/14/05 Analyzed 06/15/05 <br /> Iron 9570 100 ug/I 1000 9500 7 85-115 BB LN <br /> Matrix Spike Dup(5F14013-MSD1) Source MOF0335-04 Prepared 06/14/05 Analyzed 06/15/05 <br /> Iron 10200 100 ug/I 1000 9500 70 85-115 6 20 BB LN <br /> Batch 5F14014-EPA 3005A/EPA 200 7 <br /> Blank(5F14014-BLK1) Prepared 06/14/05 Analyzed 06/16/05 <br /> Oan <br /> ND 100 ug/I <br /> boratory Control Sample(5F14014-BSI) Prepared 06/14/05 Analyzed 06/16/05 <br /> Iron 1030 100 ug/1 1000 103 85-115 <br /> Matrix Spike(5F14014-MSI) Source MOF0335-10 Prepared 06/14/05 Analyzed 06/16/05 <br /> Iron 1150 100 ug/I 1000 120 103 85-115 <br /> Matrix Spike Dup(5F14014-MSDI) Source MOF0335-10 Prepared 06/14/05 Analyzed 06/16/05 <br /> Iron 1120 100 ug/1 1000 120 100 85-115 3 20 <br /> Sequoia Analytical -Morgan Hill The results in this report apply to the samples analy_ed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 11 of 20 <br />