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Sequoia 1455 McDowell Blvd North D <br /> Petaluma,CA 94949 54 <br /> (707)792 1865 <br /> Analytical FAX(707)792.0342 <br /> www scquoialabs com <br /> Secor-Rancho Cordova Project Arco Site 4932,Stockton,CA P305591 <br /> 3017 Mgarc Road Suite 100 Project Number 38984 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 06/05/03 16 20 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015BI8021B <br /> Sequoia Analytical- Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> F P305591-02 Air Sampled 5/29103 10 00 Received 05/29/03 12 50 <br /> Gasoline Range organics 19 10 mg/ml Air 0 2 3050782 05/31/03 05/31/03 EPA <br /> 8015B/8021B <br /> Benzene 042 010 " <br /> Toluene 099 010 " <br /> Ethylbenzene 017 010 " <br /> Xylenes(total) 0 81 010 <br /> Methyl tert-butyl ether 17 040 B <br /> Surrogate a a a-Trilluorotoluene 97% 65-135 " <br /> Surrogate 4-Bromofluorobenzene 105% 65-135 " <br /> Gasoline Range Organics 5 5 28 ppmv 0 2 " <br /> Benzene 013 0 032 " <br /> Toluene 026 0 026 <br /> Wbylbenzene 0 039 0 024 " <br /> ylenes(total) 019 0 024 <br /> Methyl tent-butyl ether 047 0 11 " B <br /> Surrogate a a a-Trifluorotoluene 97% 65-135 " <br /> Surrogate 4-Bromofluorobenzene 105% 65-135 " <br /> EEE(P205591-02RED Air Sampled 05/29/03 10 00 Received 05/29/03 12 50 A-01,HT-04 <br /> Gasoline Range Organics 17 t0 mg/ml Air 0 2 3050782 06/01/03 06/01/03 EPA <br /> 8015B/802IB <br /> Benzene 036 010 ^ " <br /> Toluene 086 010 <br /> Ethylbenzene 017 010 <br /> Xylenes(total) 072 010 <br /> Methyl tent-butyl ether 1.4 040 <br /> Surrogate a a a-Tnfluorotoluene 99% 65-135 " <br /> Surrogate 4-Bromofluorobenzene 105% 65-135 " <br /> Gasoline Range Organics 4 9 28 ppmv 0 2 " <br /> Benzene Oil 0 032 <br /> Toluene 023 0 026 <br /> Ethylbenzene 0 039 0 024 <br /> Xylenes(total) 017 0 024 <br /> Methyl tert-butyl ether 040 0 11 " <br /> Surrogate a a a-Tnfluorotoluene 99% 65-135 " <br /> Surrogate 4-BromoRuorobenzene 105% 65-135 " <br /> 10 quota Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document Unless otherwise staled results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> Page 4 of 8 <br />