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Sequoia 819 Striker Avenue,Suite 8 <br /> Sacramento 1 <br /> TWO Analytical )9 95834 <br /> (9[6)921-9600 <br /> FAX(916)921-0100 <br /> ` www.sequoialabs.80rn 1 <br /> D <br /> elta Environmental Consultants(Cameron Park) Project: Arco 6100,Tracy,CA J <br /> Cameron Park Dr.Ste 550ron Park CA,95682 Project Number. NIA <br /> Project Manager: Reported: <br /> Jay Johnson 09/21/01 15:50 <br /> Volatile Organic 8 Oxygenated Compounds by EPA Method 8260B-Quality Control ! M <br /> Sequoia Analytical-San Carlos <br /> i <br /> Analyte Reporting Spike Source °/aREC <br /> Result RPD <br /> Limit Units Level Result %RtesEC Limits RPD Limit No <br /> Batch 1090062-EPA 50308[PIT] <br /> Matrix Spike Du (1090062-MSD1 F <br /> Source:5109118-06 Prepared&Anal zed:09/17/01 <br /> Methyl tert-bury[ether 2.360.10 0.10 mg/kg 2.50 ND 94.4 60-140 7.74 25 <br /> Surrogate:1,2-Dichloroethane-d4 2.24 <br /> Surrogate: Toluene-d8 2.50 84.6 70-121 <br /> 2.43 1.50 97.2 81-117 <br /> f <br /> � t <br /> f j <br /> L <br /> � � f <br /> 1 <br />` r <br /> f <br /> w <br /> i k <br /> � I <br /> k � <br /> i <br />� � w <br /> i <br /> 4 <br /> I <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document. This analytical report must be reproduced in its entirety. <br /> I <br /> Page Page 23 of 24 <br /> 1 . <br />