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819 Striker Ave Ste 8 <br /> Sequoia Sacramcnto,CA 95834 <br /> (916)921-96M <br /> Analytical FAX(916)921-0100 <br /> www scquoialaba.com <br /> ' Geological Technics,Inc Pro ect Cardoza <br /> ] 5410678 <br /> 1101 7th Street Project Number 662,2 Reported <br /> ' Modesto CA,95354 Project Manager Joseph Angulo 11/11/0418 10 <br /> GasohnelBTEXIOgygenates 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 4110123-EPA 50306 [P/T1/EPA 8260E <br /> Blank(4110123-BLK2) Prepared&Analyzed 11/09/04 <br /> Ethanol ND 020 mg/kg <br /> ' Tert-butyl alcohol ND 0 050 <br /> Methyl tent-butyl ether ND 00050 <br /> Di-isopropyl ether ND 00050 " <br /> ' Ethyl tert-butyl ether ND 00050 n <br /> Tert-amyl methyl ether ND 00050 <br /> 1,2-Dichloroethane ND 00050 " <br /> 1,2-Dihromcethane(EDB) ND 00050 " <br /> ' Benzene ND 00050 " <br /> Ethylbenzene ND 00050 " <br /> Toluene ND 00050 " <br /> Xylenes(total) ND 0 010 " <br /> asolme Range Organics(C4-C12) ND 050 " <br /> Surrogate 1,2-DCA-d4 00104 00100 104 60-140 <br /> Surrogate Toluene-d8 00113 00100 113 60-140 <br /> Surrogate 4-BFB 000704 00100 70 60-140 <br /> Laboratory Control Sample(4110123-BS2) Prepared&Analyzed 11/09/04 <br /> Methyl tent-baty]ether 00157 00050 mg/kg 00200 78 60-140 <br /> ' Benzene 00199 00050 00200 100 70-130 <br /> Toluene 00226 00050 00200 113 70-130 <br /> Surrogate 12-DCA-d4 00100 00100 100 60-140 <br /> ' Surrogate Toluene-d8 00106 i; 00100 106 60-140 <br /> Surrogate 4-BFB 000909 00100 91 60-140 <br /> Laboratory Control Sample(4110123-BS3) Prepared&Analyzed 11/09/04 <br /> ' Methyl tert-butyl ether 00275 00050 mg/kg 00432 64 60-140 <br /> Benzene 00243 00050 00268 91 70-130 <br /> Toluene 0 151 00050 0152 99 70-130 <br /> Gasoline Range Organics(C4-C12) 226 050 220 103 70-130 <br /> ' Surrogate 12-DCA-d4 00111 " 00100 111 60-140 <br /> Surrogate Toluene-d8 00110 00100 110 60-140 <br /> Surrogate 4-BFB 00100 00100 100 60-140 <br /> 1 <br /> ' Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 9 of 12 <br />