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7 819 Striker Avenue,Suite 8 <br /> Sequoia <br /> V e q� of a Sacramento,CA 95834 <br /> Ci) <br /> (916)921-9600 <br /> Analytical wFAX(916)921-0100 <br /> ww.sec}u of a I a Vs.com <br /> Stratus Environmentai Project: ARCO 5469,Stockton,CA <br /> 3330 Carneron Park Drive,Ste. 550 Project Number: 5469,Stockton,CA Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 10/14/02 16:55 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Levet Result %REC Limits RPD Limit Notes <br /> Batch 2100051 -EPA 5030D (Pg) _ <br /> LCS Dup(2100051-BSD1) Prepared: 10/03/02 Analyzed: 10/04/02 <br /> Benzene 9.72 0.50 ug/i 10.0 97 70-130 0.2 25 <br /> Toluene 9.72 0.50 10.0 97 70-130 2 25 <br /> Ethylbenzene 8.87 0.50 10.0 89 70-130 0.7 25 <br /> Xylenes(total) 28.6 0.50 30.0 95 70-130 16 25 <br /> Surrogate:a,a,a-Trifluorotoluene 9.71 10.0 97 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. This analytical report must be reproduced in its entirety. <br /> Page 10 of 13 <br />