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a— ) (916)8]9 SinkerAve Ste 8 <br /> Sequoia Sacramento CA 95834 <br /> Analytical 9219604 FAX(916)921 0100 <br /> www sequoialaa[abs corn <br /> SECOR International-Rancho Cordova Project Tosco 5447,Stockton,CA S307351 <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 07/23/03 14 09 <br /> Total Petroleum Hydrocarbons as Gasohne and BTEX by EPA 8015B/8021B-Quality Control <br /> Sequoia Analytical-Petaluma <br /> Repotting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3070447-EPA 5030 sods <br /> Blank 3070447-BLKI Prepared&Analyzed 07/22/03 <br /> Gasoline Range Organics ND 1000 ug/kg <br /> Benzene ND 5 0 " <br /> Toluene ND 5 0 " <br /> Ethylbenzene ND 5 0 " <br /> Xylenes(total) ND 5 0 " <br /> Methyl tent-butyl ether ND 5 0 " <br /> Surrogate a a a-Trifluorotoluene 323 300 108 65-135 <br /> Surrogate 4-Bromofluorobenzene 313 300 104 65-135 <br /> Laboratory Control Sample(3070447-BSI) Prepared&Analyzed 07/22/03 <br /> Gasoline Range Organics 2220 1000 ug/kg 2750 81 65-135 <br /> Wenzene 33 6 5 0 400 84 65-135 <br /> oluene 177 5 0 186 95 65-135 <br /> Ethylbenzene 40 1 5 0 470 85 65-135 <br /> Xylenes(total) 199 5 0 210 95 65-135 <br /> Methyl tert-butyl ether 55 5 5 0 620 90 65-135 <br /> Surrogate a a a-Trifluorotoluene 323 300 108 65-135 <br /> Surrogate 4-Bromofluorobenzene 312 300 104 65-135 <br /> Matrix Spike(3070447-MSI) Source P307344-02 Prepared&Analyzed 07/22/03 <br /> Gasoline Range Organics 2040 1000 ug/kg 2750 ND 74 65-135 <br /> Benzene 31 4 5 0 400 ND 78 65-135 <br /> Toluene 164 5 0 186 ND 88 65-135 <br /> Ethylbenzene 372 5 0 470 ND 79 65-135 <br /> Xylenes(total) 184 5 0 210 ND 88 65-135 <br /> Methyl tert-butyl ether 47 5 5 0 620 ND 77 65-135 <br /> Surrogate a a a-Tnfluorotoluene 322 300 107 65-135 <br /> Surrogate 4-Bromofluorobenzene 306 300 102 65-135 <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 6of10 <br />