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"1S <br /> e ��i� <br /> ,." 1455 McDowell Blvd,North Ste D <br /> Petaluma,CA 94954 <br /> (707)79211865 <br /> a FAX(707)79210342 <br /> / www.sequoialabs'.com <br /> URS Com-Sacramento Project: Arco Site 6100,Tracy,CA P309366 I <br /> 2870 Gateway Oaks Drive Suite 300 Project Number: WR36619 :Reported: t t <br /> Sacramento CA,95833 Project Manager: Jay Johnson 10/06/03 18:00 <br /> I <br /> Total Petroleum Hydroearbons as Gasoline b EPA 8015B <br /> y - <br /> Quality Control <br /> Sequoia Analytical-Petaluma <br /> C Reporting Spike Source %REC RPD <br /> i. <br /> Analyte; Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3090580-EPA 5030,waters I <br /> Blank(3090580-BLKI) Prepared&Anal zed:09/25/03 <br /> Gasoline Range Organics ND 50 ug/l k <br /> Surrogate:4-BrmmoJlemrnhenzene :259 300 86 65-135 <br /> Laboratory Control Sample(3090580-BSI) li' Prepared&_Analyzed:09/25/03 i <br /> Gasoline Range Organics 2470 50 ug/l 2750 90 65-135 <br /> Surrogate:4-Bromofluorohenzene 290 '', 300 97 65-135 <br /> r MatrixSpike(3090580-MS I) Source:P309367-01 Prepared&Analzed:09/25/03 <br /> GasolineRange Organics 2500 " 50 u9n 2750 ND 91 65-135 j <br /> I'F Surrogate:4-Bromofluorohenzene 292 300 97 65-135 <br /> ' L <br /> f: Matrix Spike Dup(3090580-MSDI_ Source:P309367-01 Prepared&Analyzed:09/25/03 <br /> Gasoline.Range Organics 2410 50 ug/l 2750 ND 88 65-135 4 20 <br /> Surrogate:4-Bromofluorobenzene 288 1" 300 96 65-135 <br /> F i t <br /> u 4 J <br /> 4 <br /> :t <br /> {l <br /> - ss <br /> ii <br /> Sequoia Analytical-Petaluma ;'• The results in this report apply to the samples analyzed in accordance with the chain <br /> of custodv document. Unless otherwise stated,results are reported on a wet weight, <br /> s <br /> hasis.This analvtical report must be reproduced in its entirety. <br /> Page 6 4 9. <br />