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Sequoia ,UMWalnut Geek CA CA ane <br /> 94598 <br /> 4 (9Z5)988-9600 <br /> Analytical FAX equoalabsc 73 <br /> www sequolalabs com <br /> ecor-Rancho Cordova Project Arco <br /> 017 Kilgore Rd,Ste #100 Project Number Arco 4 595 Stockton Reported <br /> ancho Cordova CA,95670 Project Manager Rusty Benkosky 29-Aug-01 11 31 <br /> Total Metals by EPA 6000/7000 Series Methods - Quality Control <br /> ' Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %RFC RPD <br /> nalyte Result Limit Units Level Result %RI-C Limits RPD Limit Motes <br /> Batch 1C20009- EPA 3050B <br /> lank(IC20009-BLK1) Prepared 20-Jul-01 Analyzed 23-Jul-01 <br /> ad ND l 0 rng/kg <br /> f.d <br /> S(1G20009-BS1) Prepared 20-Jul-Ol Analyzed 23-Jul-01 <br /> 493 1 0 rnglkg 500 986 80-120 <br /> LCS Dup(1G20009-BSDI) Prepared 20-Jul-01 Analyzed 23-Jul-01 <br /> lad 492 l 0 mg/kg 500 994 80-120 0203 20 <br /> atrix Spike(IG20009-MSI) Source %1'107334-14 Prepared 20-Jul-01 Analyzed 23-Jul-01 <br /> Lcad 506 l 0 mg/kg 500 67 878 8D 120 <br /> latrix Spike Dup(lG20009-MSD1) Source W107334-14 Prepared 20-Jul-01 Analyzed 23-Jul-01 <br /> ad 490 10 mg/kg 50 0 67 846 80-120 3 2l 20 <br /> i <br /> I <br /> qugta Analytical -Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> ' Page 12 of 16 <br />