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e 819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> (D (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> www sequoialabs corn <br /> lta Environmental Consultants(Cameron Park) Project Arco 6100,Tracy,CA <br /> 330 Cameron Park Dr Ste 550 Project Number Arco 6100,Tracy,CA Reported <br /> Cameron Park CA,95682 P-ject Manager Jay Johnson 01/25/02 13 34 <br /> Total Metals by EPA 6000/7000 Series Methods - Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %1REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Not. <br /> Batch 2010292-EPA 3050B <br /> Blank(20_10292-BLK1) Prepared&Analyzed 01/24/02 <br /> Lead ND 25 mg/kg <br /> LCS (2010292-BSI) Prepared&Analyzed 01/24/02 <br /> Lead 506 2 5 mg/kg Soo 101 80-120 <br /> Matrix Spike(2010292-MS1) Source S201330-01 Pr ared&Analyzed 01/24/02 <br /> Lead 53 4 10 mg/kg 500 ND 89 4 80-120 <br /> Matrix Spike Dup(2010292-MSDI) Source S201330-01 Prepared&Analyzed 01/24/02 <br /> Lead 540 10 mg/kg 500 ND...,, 906 80-120 .1 12 20 ._ <br /> 20 <br /> nota Analytical - Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document This analytical report must be reproduced in its entirety <br /> Page Page 5 of 6 <br />