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a— ) (916)921 <br /> Sinker Ave Ste S <br /> Sequoia Sacracr amentoCA 95834 <br /> Analytical FAX 9600 <br /> (916)921 0100 <br /> www sequoialabs cam <br /> SECOR International-Rancho Cordova Project Tosco 5447,Stockton,CA S307373 <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 08/04/03 16 14 <br /> Gasoline(2-Methylpentane to 1,2,4-Tnmethylbenzene) and BTEX by EPA 8015M and 8021B -Quality Control <br /> Sequoia Analytical-Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units level Result %REC Limits RPD Limit Notes <br /> Batch 3070291-EPA 5030B P/T <br /> Blank 3070291-BLK1 Prepared 07/23/03 Analyzed 07/24/03 <br /> Purgeable Hydrocarbons ND 0 10 mg/kg <br /> Benzene ND 00050 " <br /> Toluene ND 00050 " <br /> Ethylbenzene ND 00050 " <br /> I <br /> Xylenes(total) ND 00050 " <br /> Surrogate a a a-Trifluorotoluene 00126 00200 63 60-140 <br /> Blank(3070291-BLK2) _ Prepared&Analyzed 07/28/03 <br /> Purgeable Hydrocarbons ND 0 10 mg/kg <br /> Benzene ND 00050 <br /> Toluene ND 00050 <br /> Ethylbenzene ND 00050 " <br /> Xylenes(total) ND 00050 " <br /> Surrogate a a a-Trifluorotoluene 00156 00200 78 60-140 <br /> Laboratory Control Sample(3070291-BSI) Prepared 07/23/03 Analyzed 07/24/03 <br /> Benzene 00185 0 0050 mg/kg 00200 92 70-130 <br /> Toluene 00174 0 0050 00200 87 70-130 <br /> Ethylbenzene 00179 0 0050 00200 90 70-130 <br /> Xylenes(total) 00581 0 0050 00600 97 70-130 <br /> Surrogate a a a-Trifluorotoluene 00176 00200 88 60-140 <br /> Laboratory Control Sample 3070291-BS2 Prepared&Analyzed 07/28/03 <br /> Benzene 00156 00050 mg/kg 0 0200 78 70-130 <br /> Toluene 00154 00050 0 0200 77 70-130 <br /> Ethylbenzene 0 0152 00050 00200 76 70-130 <br /> Xylenes(total) 00459 00050 00600 76 70-130 <br /> Surrogate a a a-Trifluorotoluene 00152 00200 76 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 6 of 10 <br />