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Sequoia Dove <br /> Hi <br /> Morgan Hilll CA CA 95037 <br /> ��► (408)776 9390 <br /> Analytical <br /> FAX(408)782 6398 <br /> www sequoialabs cum <br /> URS Corporation[Arcot I Project ARCO#5469,Stockton,CA MPF0114 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number GOBZP-0010 Reported <br /> Sacramento CA,95833 Project Manager ,lay Johnson 06/30/06 11 12 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 6FO7022-EPA 50308 PIT 1 EPA 8260B <br /> Blank(61707022-BLK1) Prepared&Analyzed 06/07/06 <br /> tert-Amyl methyl ether ND 050 ug/l <br /> Benzene ND 050 <br /> t6rt Butyl alcohol ND 20 " <br /> Dt isopropyl ether ND 0 50 <br /> 1 2 Dibromoethane(EDB) ND 0 50 <br /> 1 2 Dichloroethane ND 0 50 <br /> Ethanol ND 300 " <br /> Ethyl tert-butyl ether ND 050 <br /> Ethylbenzene ND 050 <br /> Methyl tert-butyl ether ND 0 50 " <br /> Toluene ND 0 50 <br /> lenes(total) ND 0 50 <br /> oline Range Organics(C4-C12) _ ND 50 <br /> Surrogate I2-Dichloroethane-d4 444 500 _ W 89 60-145 <br /> Surrogate Toluene-d8 4 64 5 00 93 70-130 <br /> Surrogate Dibromofluoromethane 475 500 95 75-130 <br /> Surrogate 4 Bromofluorobenzene 464 5 00 93 60-115 <br /> Laboratory Control Sample(6FO7022-BSI) _ _v _ Prepared&Analyzed 06/07_/O_6_ _ <br /> tert-Amyl methyl ether 146 0 50 um15 0 97 65 135 <br /> Benzene 5 06 0 50 5 16 98 70-125 <br /> ten Butyl alcohol t69 20 143 118 60-135 <br /> Di-isopropyl ether 143 0 50 151 95 70-130 <br /> l 2-Dibromoethane(EDB) 161 0 50 149 l08 85-125 <br /> 1 2-Dichloroethane 142 050 147 97 75-125 <br /> Ethanol 164 300 142 115 15-150 <br /> Ethyl tert-butyl ether 152 0 50 150 101 65-130 <br /> Ethylbenzene 7 71 0 50 7 54 102 80 130 <br /> Methyl tert-butyl ether 720 0 50 7 02 103 50 140 <br /> Toluene 386 050 372 104 70420 <br /> Xylenes(total) 432 050 41 2 105 85-125 <br /> Gasoline Range Organics(C4 C12) 433 SO 440 98 75 140 <br /> Surrogate 12 Dichloroethane d4 4 S5 v 5 00 91 60-145 <br /> Surrogate Toluene-d8 4 80 5 00 96 70430 <br /> Surrogate Dibromofluoromethane 4 54 5 00 91 75-130 <br /> Surrogate 4-Bromofluorobencene 483 5 00 97 60-115 <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analysed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> . Ars analytical report must be reproduced in its entirety <br /> Page 14 0f20 <br />