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w Y'fS Sinker Ave Ste e <br /> Sequoia Sacramento CA 95$34 <br /> (916)921 00 <br /> 01 <br /> Analytical FAX(916)921 OIOD <br /> www sequaialabs com <br /> SECOR International-Rancho Cordova Prosect Tosco 5447,Stockton,CA 5307351 <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Protect Manager Rusty Benkosky 07/23/03 14 09 <br /> Total Metals by EPA 6000/7000 Series Methods -Quality Control <br /> Sequoia Analytical-Sacramento <br /> Reporting Spike Source %REC RPR <br /> Analyte Result Lima Units Levcl Result %ELEC Limits RPD Limit Notes <br /> Batch 3070182-EPA 30508 <br /> Blank 3070182-BLK1 Prepared 07/15/03 Analyzed 07/16/03 <br /> Lead ND 2 5 mg/kg <br /> Blank 3070182-BLK2 Prepared&Analyzed 07/17/03 <br /> Lead ND 25 mg/kg <br /> Blank 3070182-BLK3 Prepared&Analyzed 07/18/03 <br /> Lead ND 2 5 mg/kg <br /> Laboratory Control Sample 3070182-BS] Prepared 07/15/03 Analyzed 07/16/03 <br /> Lead 41 0 2 5 mg/kg 500 82 80-120 <br /> Laboratory Control Sample 3070182-BS2 Prepared&Analyzed 07/17/03 <br /> Lead 41 8 2 5 mg/kg 500 84 80-120 <br /> Affilli,LaboratoryControl Sample 3070182-BS3 Prepared&Analyzed 07/18/03 <br /> ead 36 1 2 5 mg/kg 500 72 80-120 I-04 <br /> Matnx Spike 3070182-MS1 Source 5307170-01 Prepared 07/15/03 Analyzed 07/16/03 <br /> Lead 108 10 mg/kg 500 88 40 80-120 QM-07 <br /> Matrix Spike Du 3070182-MSDI Source 5307170-01 Prepared 07/15/03 Analyzed 07/16/03 <br /> Lead 114 10 mg/kg 50 0 88 52 80-120 5 20 QM-07 <br /> •Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> ofcustody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> Page 9 of 10 <br />