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885 Jarvis Drive <br /> . Morgan Hill,CA 95037 <br /> (408)776-9600 <br /> Sequoia FAX(408)782-6308 <br /> An, www.sequoialabs.com <br /> alytical <br /> Project:ARCO#0595,CA MPA0033 <br /> =GateWway <br /> t] Reported: <br /> Project Number:GOBZG-0002 01!06/06 15:57 <br /> .,Ste 300 Project Manager:Vernon P.Elarth <br /> Total Metals by EPA 6000/7000 Series Methods - Quality Control <br /> Sequoia Analytical-Morgan Hill <br /> Reportin g Spike Source %REC RPD <br /> Result Limit Units Level Result %REC Limits RPD <br /> Limit Notes <br /> [Anal=ytc <br /> Batch 6AO5025-EPA 3050B/EPA 6010B <br /> — Prepared&Analyzed:01/05/06 <br /> Blank(6AO5025-BLKl) <br /> Lead ND 5.0 mg/kg <br /> Prepared&Analyzed:01/05/06 _ ---- <br /> Laboratory Control Sample(6AO5025-BSI) 50.0 94 75-120 <br /> Lead 47.2 5.0 mg/kg <br /> Matrix Spike(6AO5025-MSI) Source:MOL0982-01 Prepared&Analyzed:01/05/06 <br /> Lead 134 10 mg/kg 50.0 88 92 75-120 <br /> Matrix Spike Dup(6AO5025-MSD1) Source:MOL0982-00m 1 Prepared&An8aalyzed:01/05/0675-120 4 20 <br /> Lead 129 mg/kg <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document.Unless otherwise stateg results are reported on a wet weight basis. <br /> This analyticalrepot!/I11lJIdB1Et(1/0(,�(!�If�/jfe��Jre/„ <br /> Page 5 of 8 <br />