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rvis <br /> ve <br /> Sequoia 885.1aCA95 37 <br /> a— ) uQ�a Morgan Hdl CA 95037(408)776 9600 <br /> Analytical FAX(408)782-6308 <br /> www sequoialabs com <br /> 0 <br /> URS Corporation(AreoI I Project ARCO#5469, Stockton, CA MOL0448 <br /> 2870 Gateway Oaks Dr, Ste 300 Project Number GOBZP-0002 Reported <br /> Sacramento CA,95833 Project Manager,lay Johnson 12/22/05 11 44 <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 Lima Notes <br /> Batch 5L20018-EPA 5030B PIT/EPA 8260B <br /> Matrix Spike Dup(5L20018-MSDI) Source MOL0448-08 Prepared 12/20/05 Analyzed 12/21/05 <br /> tert-Amyl methyl ether 1460 50 ug/l 1500 ND 97 80-115 4 15 <br /> Benzene 568 50 516 ND 110 65-115 5 20 <br /> tert-Butyl alcohol 12600 2000 14300 ND 88 75-120 16 25 <br /> Di-isopropyl ether 1740 50 1510 ND 115 75-125 0 6 15 <br /> 1,2-Dibromoethane(EDB) 1500 50 1490 ND 101 85-I20 5 15 <br /> 12-Dichloroethane 1770 50 1470 ND 120 85-130 8 20 <br /> Ethanol 19500 10000 14200 ND 137 70-135 0 35 LM <br /> Ethyl tert-butyl ether 1620 50 1500 ND 108 75-130 5 25 <br /> Ethylbenzene 691 50 754 ND 92 75-135 6 15 <br /> Methyl tert-butyl ether 5420 50 702 4100 188 65-125 5 20 BB,LM <br /> Toluene 3830 50 3720 ND 103 85-120 4 20 <br /> nes(total) 3560 50 " 4120 ND 86 85-125 4 20 <br /> me Range Organics(C4-C12) 43300 5000 44000 2200 93 60-140 3 25 <br /> Surrogate 1 1-Dichloroethane-d4 256 250 102 60-135 <br /> o <br /> uoia 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 /> This analytical report must be reproduced in its entirety <br /> Page 15 of 18 <br />