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Sequoia $19 Striker Avenue Suite$ <br /> Sacramento CA 95834 <br /> (916)921-9600 <br /> Analytical FAX(916)921 alabs c 00 <br /> 111 www sequoialabs corn <br /> D K Barber PE&Associates Project Western Oil&Spread-Acampo S311112 <br /> 8710 Mt Vemon Rd Project Number N/A Reported <br /> Aubum 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 %RFC Limits RPD Limit Notes <br /> Batch 3110070-EPA 5030B(PIT) <br /> Laboratory Control Sample(3110070-BS3) Prepared&Analyzed 11111/03 <br /> Benzene 982 050 ug/1 100 98 70-130 <br /> Toluene 101 050 100 101 70-130 <br /> Ethylbenzene 100 050 „ 100 100 70-130 <br /> Xylenes(total) 290 050 300 97 70-130 <br /> Surrogate a a a-Trifluorotoluene T 122 1019 122 60-140 <br /> _Matrix Spike(3110070-MSI) _ Source S311073-02 Prepared&Analyzed 11/06/03 _ <br /> Benzene 935 050 ug/1 10 0 ND 94 60-140 <br /> Toluene 9 92 050 10 0 ND 99 60-140 <br /> Ethylbenzone 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 119 100 119 60-140 <br /> Wrix Spike Dup(3110070_MSD1) Source 5311073-02 _ Prepdred&Analyzed 11/06/03 <br /> Benzene 9 46 0 50 ug/l 10 0 ND 95 60-140 1 25 <br /> Toluene 994 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 6 050 300 ND 95 60-140 1 25 <br /> Surrogate a a a-Trifluorotoluene 120 100 124 60-140 ` <br /> ' quoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> ' This analytical report must be reproduced in its entirety <br /> Page 7 of 8 <br />