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Sequoia 1455 McDowell Blvd,North Ste D <br /> Z <br /> Petaluma CA 94944 <br /> r Analytical (707}792- <br /> FAX(707)792-0342342 <br /> www sequoialabs co <br /> Secor-Rancho Cordova Project Arco Site 4932,Stockton,CA P309112 <br /> 3017 Kilgare Road Suite 100 Project Number 30732 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 09/16/03 18 59 <br /> Total Petroleum Hydrocarbons as Gasoline by EPA 8015B-Quality Control <br /> Sequoia Analytical-Petaluma <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3090279-EPA 5030 waters <br /> Blank(3090279-BLKI) - Prepared&Analyzed 09/12/03 <br /> Gasoline Range Organics ND 50 ug/l ` <br /> Surrogate 4-BromoJluorobenzene 281 300 94 65-135 <br /> Laboratory Control Sample(3490279-BSI) -- - Prepared&Analyzed 09/12/03 <br /> Gasoline Range Organics 2120 50 119/1 2750 77 65-135 <br /> Surrogate 4-Bromofluorobenzene 199 300 100 65-135 <br /> Matrix Spike 3090279-MSI) Source P309077-01 Prepared&Analyzed 09/12/03 <br /> Gasoline Range Organics 2090 50 ug/1 2754 18 75 65-135 <br /> Surrogate 4-Bromofluarobenzene 288 300 96 65-135 <br /> Matrix Spike Dup(3090279-MSD]) Source P309077-01 _ Prepared&Analyzed 09/12/03 _ <br /> Gasoline Range Organics 2070 50 ug/l 2750 18 75 65-135 1 20 <br /> Surrogate 4-Bromofluorobenzene 197 11300 99 65-135 <br /> Sequoia Analytical-Petaluma 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 zu entirety <br /> Page 6 of 11 <br />