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w►.��1 Sequoia 8851 CA 95037 <br /> Morgan 11111 CA 95037 <br /> (408)776-9600 <br /> Analytical www <br /> seq(408)782-6308308 <br /> www sequotalabs coin <br /> URS Corporation[Arco]1 Project ARCO#2130,Stockton,CA MOL0602 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number GOBZK-0002 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 01/04/06 16 01 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical -Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Note <br /> VW-7(MOL0602-13)Water Sampled 12/11/05 12 25 Received 12/14/05 08 30 <br /> tert-Amyl methyl ether 23 050 ug/l 1 5L21028 12/21/05 12/22/05 EPA 8260B <br /> Benzene ND 050 " <br /> tert-Butyl alcohol 130 20 " <br /> Di-isopropyl ether ND 0 50 " <br /> 1,2-Dtchloroethane 210 050 " <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Ethylbenzene ND 0 50 " <br /> Methyl tert-butyl ether 8 8 0 50 <br /> Toluene ND 050 " <br /> Xylenes(total) 0 61 0 50 " <br /> Gasoline Range Organics(C4-C12) 290 50 " <br /> Surrogate 1 2-Dtchloroethane-d4 81 % 60-135 <br /> -8(MOL0602-14)Water Sampled 12/11/05 08 20 Received 12/14!05 08 30 <br /> ert-Amyl methyl ether ND 5 0 ugll 10 5L22023 12/22/05 12/23/05 EPA 8260E <br /> Benzene 550 50 " <br /> tert-Butyl alcohol ND 200 " <br /> Di-isopropyl ether ND 50 " <br /> 1,2-Dtchloroethane ND 50 " <br /> Ethanol ND 1000 " <br /> Ethyl tent-butyl ether ND 5 0 " <br /> Ethylbenzene 220 5 0 " <br /> Methyl tert-butyl ether ND 50 " <br /> Toluene 58 5 0 " <br /> Xylenes(total) 170 5 0 " <br /> Gasolme Range Organics(C4-C12) 2700 500 " <br /> Surrogate 1 2-Dtchloroethane-d4 106% 60-135 <br /> Sequoia Analytical-Morgan Htll The results rn 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 /> This analytical report must be reproduced in its entirety <br /> Page 9 of 28 <br />