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r <br /> 1455 McDowell Blvd,North Ste D <br /> sequoia(i) Petaluma CA 9494 <br /> (707)792 1865 <br /> 1$ fir' 11� FAX(707)792 0142 <br /> 4 <br /> www sequorilabs com <br /> URS Coro-Sdcramcntc Project Arco Site 5469,Stockton,CA P403099 <br /> 2870 Gateway OaU Drive Suite 300 Project Number WR36605 Reported <br /> Sacramento CA 95833 Project Manager Jay Johnson 44/06/04 17 16 <br /> Total Metals by EPA 6000/7000 Series Methods- Quality Control <br /> Sequoia Analytical- Petaluma <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Unps Level Result °4 RLC Limits RPD Limit 'Votes <br /> Batch 4030274-EPA 3010A <br /> Blank(4030274-RI.Ki) Prepared&Analyzed 03/12/04 <br /> Iron ND 300 ugA <br /> Laboratory Control Sample(4030274-BSI) Prepared 03/10104 Analyzed 03/12/04 <br /> Iron 5310 300 1194 5004 — 106 80-120 <br /> Matrix Spike 4030274-MS1 Source P403111-01 Prepared 03/10/04 Analyzed-03/12/04 <br /> Iron 7420 300 ug/l 5000 1900 102 80-120 <br /> Matrix Spike_Du0(403_027_4-M_SD_1) _ _ Souice P403111-01 _ Prepared 03/10/04 Analyzed 03/12/04 <br /> Iron 6940 300 ug/1 5000 1900 101 80-120 1 20 <br /> uola Analytical-Petaluma The+etiults in flus 1epo+t apple to the suniples analtced in acco+dance 14iih the thaw <br /> of,astodi document Unless otheivslve staied ii-w is are+epoiled oil u Nel11eight <br /> basis Tlrrsanahtnaf+epo+t+uasthe+ep+oducedrnuse+utrcft <br /> Page 20 of 35 <br />