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Sequoia 1455 McDowell Blvd North,Ste D <br /> Petaluma,CA 94954 <br /> (707)742-1865 <br /> Analytical www <br /> (707) 42 <br /> se4uotalalabs corn <br /> Gettler-Ryan-Dublin Project Tosca <br /> 6747 Sierra Ct, Suite J Project Number 2701 West March Lane,Stockton,CA Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 07/27/01 10 24 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015NV8020M - Quality Control <br /> Sequoia Analytical - Petaluma <br /> Deporting Spike Source %REC RPD <br /> Analyte Result Limit Umts level Result %REC Limits RPD Limit Notes <br /> Batch 1020053 -EPA 5430,waters <br /> Matrix Spike Dap(1020053-MSD1) Source P101733-02 Prepared&Analyzed 02/02/01 <br /> Gasoline 2340 500 ug/l 2750 109 81 1 65-135 0 426 20 <br /> Benzene 486 0 500 320 178 962 65-135 204 20 <br /> Toluene 167 0 500 193 ND 865 65-135 237 20 <br /> Ethylbenzene 505 0 500 460 656 955 65-135 1 57 20 <br /> Xylenes(total) 215 0 500 231 ND 93 1 65-135 184 20 <br /> Methyl tert-butyl ether 750 250 520 139 118 65-135 237 20 <br /> Surrogate a a a-Trifluorotoluene 341 300 114 65-135 <br /> Surrogate 4-Bromofluorobenzene 314 300 105 65-135 <br /> is <br /> :nota Analytical-Petaliuna The results to this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 9 of 14 <br />