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Ste 8 <br /> ' ID (916)Sequoia `woo � l acmme to,CA 583 <br /> �/ Sacramento,CA 95834 <br /> Analytical FAX 921-9600 <br /> (916)921-0100 <br /> www.sequoialabs.com <br /> D.K.Barber PE&Associates Project: Western Oil&Spread-Acampo S311112 <br /> 8710 Mt.Vernon Rd. Project Number: N/A Reported: <br /> Auburn CA,95603 Project Manager: Dan Barber 11/21/03 09:26 <br /> Aromatic Volatile Organics by EPA Method 8021B-Quality Control <br /> Sequoia Analytical-Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3110070-EPA 5030B(P/T) <br /> Laboratory Control Sample(3110070-BS3) Prepared&Analyzed: 11/11/03 <br /> Benzene 9.82 0.50 ugA 10.0 98 70-130 <br /> Toluene 10.1 0.50 10.0 101 70-130 <br /> Ethylbenzene 10.0 0.50 10.0 100 70-130 <br /> Xylenes(total) 29.0 0.50 30.0 97 70-130 <br /> Surrogate:a,a,a-Trifluorotoluene 12.2 10.0 122 60-140 <br /> Matrix Spike(3110070-MSI) Source:S311073-02 Prepared&Analyzed: 11/06/03 <br /> Benzene 9.35 0.50 ug/1 10.0 ND 94 60-140 <br /> Toluene 9.92 0.50 10.0 ND 99 60-140 <br /> Ethylbenzene 9.92 0.50 10.0 ND 99 60-140 <br /> Xylenes(total) 28.3 0.50 30.0 ND 94 60-140 <br /> Surrogate:a,a,a-Trifluorotoluene 11.9 10.0 119 60-140 <br /> Matrix Spike Dup(3110070-MSDl) Source:S311073-02 Prepared&Analyzed: 11/06/03 <br /> Benzene 9.46 0.50 ug/l 10.0 ND 95 60-140 1 25 <br /> Toluene 9.94 0.50 10.0 ND 99 60-140 0.2 25 <br /> Ethylbenzene 9.90 0.50 10.0 ND 99 60-140 0.2 25 <br /> Xylenes(total) 28.6 0.50 30.0 ND 95 60-140 1 25 <br /> Surrogate:a,a,a-Trifluorotoluene 12.0 10.0 120 60-140 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document. Unless otherwise stated,results are reported on a wet weight <br /> basis. This analytical report must be reproduced in its entirety. <br /> Page 7 of 8 <br />