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GRANITE CONSTRUCTION 2093357633 06/24/02 10:33am P. 022 <br /> 819 Striker Avenue,Suite 8 <br /> e ®; Sacramento.CA 95834 <br /> i. A (916)921-9600 <br /> FAX(916)921-0100 <br /> Ana ica www.sequoialabs.com <br /> Kleinfelder-Stockton Project: Granite Bumpile <br /> 2825 East Myrtle Street ProjectNumbcr: 20-1108-33 Reported: <br /> Stockton CA,95205 Project Manager: Doug Heard 08/15/01 17:24 <br /> Total Metals by EPA 6000/7040 Series Methods-Quality Control <br /> Sequoia Analytical-Sacramento <br /> Reporting Spoke Source %RBC RPD <br /> Analyte Raolt limit Units Level Rc=1t "/OREC Limits RPD Limit Notes <br /> Batch 1080056-EPA 3050B <br /> Matrix Spike Dup(1080056-MSDU Source:5107384-10 Prepared_08/06/01 Analyzed:08/08/01- ___._____.- ••........ ......_._ <br /> Arsenic 50.3 10 mg/kg 50.0 ND 101 80-120 0.199 20 <br /> Cadmium 47.8 1.0 50.0 ND 95.6 80-120 0.00 20 <br /> Chromium 542 1.0 50.0 6.2 96.0 80-120 0.185 20 <br /> Nickel 59.3 4.0 50.0 8.1 102 80-120 1.36 20 <br /> Zinc 79.4 1.0 50.0 31 96.8 80-120 1.78 20 <br /> Batch 1080142-EPA 7471A <br /> $tante 1080142-$LK1 _� Prepared:08/13101 Analyzed:08/14/01 - <br /> Mercury ND 0.020 mg/kg <br /> I.CS(10801_42-BSl) Prepared:08/13/01 Analyzed:08/14/01 —.•„_ <br /> Mercury 0.383 0.020 mg/kg 0.417 91.8 80-120 <br /> Matrix Spike(1080142-MS11 Source:S108095-02 Prepared:08/13/01 Analyzed:08/14/01 _ _-_•_. <br /> Mercury -- _ 0.548 0.020 mg/kg 0.417 0.15 95.4 75-125 <br /> Matrix Spike Dup(1_0_8_0_142-M_SD1) ___�_..__ Source:510809542 _ prepared:08/13/01 Analyzed:08/14/01 _ <br /> Ivlerenry__ r 0.526 0.020 mg/kg 0.417 0.15 90.2 75-125 4.10 20 <br /> Sequoia Analytical-Sacramento The results in ihis 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 13 of 20 <br />