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!Set�AOla 885 Jarvis(hive <br /> [[ � Morgan Hill,CA 95037 <br /> 4De <br /> Analytical {408)776 9600 <br /> FAX(408)782-6308 <br /> www.sequoialabs.com <br /> URS Corporkion[Arcot] P-ject:ARCO#2130,Stockton,CA ' M0I0544 <br /> 2870 Gateway Oaks Dr.,Ste 300 Project Number:GOBZK-0002 Reported: <br /> Sacramento CA,95833 Project ManagerNemon P.Elarth 09/29/05 14:23 <br /> Volatile Organic Compounds by EPA Method 8260B -Quality Control <br /> Sequoia Analytical -Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte v Result Limit Units Level Result. %REC Limits RPD Limit Notes <br /> Batch 5I26007-EPA 5030B Modified 1 EPA 8260B <br /> Blank(5126007-BLK1) Prepared&Analyzed:09/26/05 <br /> tent-Amyl methyl ether ND 0.50 ug/l <br /> BenzeneP ND 0,50 " <br /> tert-Baty!alcohol ND 5.0 " <br /> Di-isopropyl edier ND 0.50 " <br /> 1,2-Dichloroethane ND 0.50 " <br /> Ethanol ND 100 IC <br /> Ethyl tert-butyl ether ND 0.50 " <br /> Ethylbenzene i ND 0.50 " <br /> Methyl ten-butyl ether ND 0.50 <br /> Toluene ND 0.50 " <br /> Xylenes(total).r ND 0.50 " <br /> —,Gasoline Range Organics(C4-C12) ND 50 " <br /> Surrogate:1,2-Dichloroethane-d4 2.55 2.50 102 60-135 <br /> Blank(5I26007-BLK2) Prepared&Analyzed:09/26/05 <br /> tert-Amyl methyl ether ND 0.50 ug/1 <br /> Benzene ND 0.50 <br /> tert-Butyl alcohol ND 5.0 <br /> Di-isopropyl et}ier ND 0.50 " <br /> 1,2-Dichloroethane ND 0.50 " <br /> Ethanol ND 100 1C <br /> Ethyltert-butylether ND 0.50 " <br /> Ethylbenzene ND 0.50 <br /> Methyl tert-butyl ether ND 0.50 " <br /> Toluene ND 0.50 " <br /> Xylenes(total) ND 0.50 " <br /> Gasoline Rangebrganics(Cil-Cl2) ND 50 " <br /> Surrogate:l,2-Dichloroethane-d4 1.34 2.50 94 60-135 <br /> f <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document.Unless otherwise stated,results are reported on a wet weight basis. <br /> C) This analytical report must be reproduced in its entirely. <br /> Page 22 of 25 <br /> f <br />