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a— ) (916) <br /> S Sinker Ave Ste 8 <br /> Sequoia Sacrr amento CA 95834 <br /> Analytical FAX 9219600 <br /> 916 921 0100 <br /> www sequoialabs corn <br /> • <br /> SECOR International-Rancho Cordova Protect TOSCO 11193, Stockton,CA S306625 <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 07/30/03 13 04 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC LIMOS RPD Limit Notes <br /> Batch 3070158-EPA 5030B [PIT] <br /> Blank(3070158-BLK2) Prepared&Analyzed 07/14/03 <br /> Tart-butyl alcohol ND 100 ug/I <br /> Di-isopropyl ether ND 2 0 " <br /> Ethyl tert-butyl ether ND 2 0 " <br /> Tert-amyl methyl ether ND 20 a <br /> Ethanol ND 500 " <br /> 1,2-Dichloroethane ND 20 " <br /> 1,2-Dibromoethane(EDB) ND 2 0 " <br /> Surrogate 1 1-DCA-d4 251 15 0 100 60-140 <br /> Laboratory Control Sample 3070158-BS1 Prepared&Analyzed 07/13/03 <br /> Surrogate 1,2-DCA-d4 238 ug/1 15 0 95 60-140 <br /> ,�6pborator <br /> y Control Sample(3070158-BS2) Prepared&Analyzed 07/14/03 <br /> rogate 1 1-DCA-d4 307 ug/l 25 0 123 60-140 <br /> Matrix Spike 3070158-MS1 Source 5307075-05 Prepared&Analyzed 07/14/03 <br /> Surrogate 1 1-DCA-d4 330 149/1 25 0 132 60-140 <br /> Matrix Spike Due(3070158-MSDI) Source S307075-05 Prepared&Analyzed 07/14/03 <br /> Surrogate 12-DCA-d4 314 ug/l 25 0 126 60-140 - <br /> Sequoia Analytical-Sacramento 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 its entirety <br /> Page 17 of 18 <br />