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819 Striker Avenue,Suite 8 <br /> 95834 <br /> Sequoia � <br /> Sacramento,916 CA -9600 <br /> 44,, (916)921-9600 <br /> A FAX(916)921-0100 <br /> Analytical l www.sequoialabs.com <br /> VOW <br /> Sierra-Pacific Groundwater,Inc. Project: Unocal Puregro Broadway <br /> Pro ect Number: N/A Reported: <br /> 4911 Windplay Drive, Ste.4 1 06/15/01 16:23 <br /> El Dorado Hills CA, 95762 Project Manager: John Rapp <br /> Total Metals by EPA 6000/7000 Series Methods - Quality Control <br /> Sequoia Analytical-Walnut Creek <br /> Reporting Spike Source %RFC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch IF02001-EPA 3050B <br /> Matrix Spike(1F02001-MSI) Source:W106021-01 Prepared:06/02/01 Analyzed: 06/05/01 <br /> Cadmium 43.0 5.0 mg/kg 50.0 ND 86.0 80-120 <br /> Chromium 53.3 5.0 50.0 7.4 91.8 80.120 <br /> Copper 116 5.0 50.0 110 12.0 80-120 Q-02 <br /> Lead 54.9 10 50.0 ND 99.8 80-120 <br /> Nickel 47.3 10 50.0 ND 94.6 80-120 <br /> Zinc 209 10 50.0 170 78.0 80-120 Q-02 <br /> Matrix Spike Dup(lF02001-MSDI) Source:W106021-01 Prepared:06/02/01 Analyzed: 06/05/01 <br /> Cadmium 43.7 5.0 mg/kg 50.0 ND 87.4 80-120 1.61 20 <br /> Chromium 53.8 5.0 50.0 7.4 92.8 80-120 0.934 20 <br /> Copper 129 5.0 50.0 110 38.0 80-120 10.6 20 Q-02 <br /> Lead 43.7 10 50.0 ND 77.4 80-120 22.7 20 Q-02 <br /> Nickel 55.6 10 50.0 ND 111 80-120 16.1 20 <br /> Zinc 215 10 50.0 170 90.0 80-120 2.83 20 <br /> Batch 1F06010-EPA 7471A <br /> Blank(1F06010-BLKI) Prepared:06/06/01 Analyzed:06/07/01 <br /> Mercury ND 0.010 mg/kg <br /> LCS(1F06010-BSI) Prepared:06/06/01 Analyzed:06/07/01 <br /> Mercury 0.109 0.010 mg/kg 0.100 109 75-125 <br /> LCS Du (1F06010-BSDI) Prepared:06/06/01 Analyzed: 06/07/01 <br /> Mercury 0.116 0.010 mg/kg 0.100 116 75-125 6.22 20 <br /> Matrix Spike(IF06010-MSI) Source:W105566-01 Prepared:06/06/01 Analyzed: 06/07/01 <br /> Mercury 0.316 0.010 mg/kg 0.100 0.13 186 75-125 Q-02 <br /> Sequoia Analytical- Sacramento 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 8 of 19 <br />