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1551 Industrial Road <br /> Sequoia Sen Carlos CA 94070 <br /> (650)232-9600 <br /> Analytical com FAX(650)232- <br /> FAX <br /> scquo}elalx com <br /> r-Ryan/G eostrateeies(l) Project Unocal(4) L208029 <br /> Sieira Court. Suite 3 Project Number Former Unocal 42859 Stockton Reported <br /> Dublin CA 94568 Project Manager Deanna Harding 08/28/02 11 23 <br /> "total Purgeable Hydrocarbons (C6-C10) by EPA 8015B modified, BTEXM by EPA 8021B - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2H23004- EPA 5030B IP/T1 <br /> Matrix Spike Dup(2H23004-MSDI) Source MLB0440-04 Prepared&Analyzed 08/23/02 <br /> Toluene 645 050 ug/l 397 15 125 60-140 0 310 25 <br /> Ethylbenzene 917 050 920 ND 943 60-140 130 25 <br /> Xylenes(total) 439 050 46 1 12 926 60-140 113 25 <br /> Surrogate aa,a-Trruorotoluene 118 100 118 70-130 <br /> is Analytical- San Carlos 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 24 of 25 <br />