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8 19 Striker Ave Ste 8 <br /> Se uoia Sacramento CA 95834 <br /> (i) <br /> `i (916)921-9600 <br /> FAX 6 -0100 <br /> IM Analvtical wwwsrouoialabs com <br /> Gettler-Ryan-Petaluma Project Tosco 1 1 192, Stockton,CA S212191 . <br /> 1364 N McDowell Blvd Ste B2 PrglectNumber N/A Reported <br /> Petaluma CA 94954 Project Manager Dave Vossler 12/20/02 13 28 <br /> Total Metals by EPA 6000/7000 Series Methods - Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2120187-EPA 3050B <br /> Blank(2120187-BLKI) Prepared 12/12/02 Analyzed 12/13/02 <br /> Lead ND 25 mg/kg <br /> Laboratory Control Sample(2120187-BSI) Prepared 12/12/02 Analyzed 12/13/02 LL <br /> Lead 443 2 5 mg/kg 500 89 80-120 <br /> Matrix Spike(2120187-MS1) Source S212186-05 Prepared 12/12/02 Analyzed 12/13/02 <br /> Lead 434 10 mg/kg 500 ND 87 80-120 <br /> _Matrix Spike Dup(2120187-MSDI) Source 5212186-05 Prepared 12/12/02 Analyzed 12/13/02 <br /> Lead 434 10 mg/kg 500 ND 87 80-120 0 20 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed 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 6 of 7 <br />