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Drive <br /> /�\ . n Hi Jarvis 5037 <br /> //��i�/_"\moi Sequoia Morgan Hill CA 95037 <br /> (408)772-9600 <br /> %AW Analytical <br /> FAX(408)762-2308 <br /> www sequotalabs corn <br /> i <br /> URS Corporation[Arcol] Project BP Heritage#11191,Stockton,CA MOG0813 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number Ct07WW-0016 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 08/05/05 14 59 <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 5G29006-EPA 5030B P/T 1 EPA 8260B <br /> Matrix Spike(SG29006-MSI) Source MOG0816-03 Prepared&Analyzed 07/29/05 <br /> tert-Amyl methyl ether 108 50 ugll 100 ND 108 80-115 <br /> Benzene 110 50 100 ND 110 65-115 <br /> tort-Butyl alcohol 504 200 500 ND 101 75-120 <br /> Di-isopropyl ether 998 50 I00 ND 100 75-125 <br /> Ethanol 1860 1000 2000 ND 93 70-135 <br /> Ethyl tort butyl ether 104 50 100 ND 104 75-130 <br /> Ethylbenzene 897 5 0 100 17 88 75-135 <br /> Methyl tert-butyl ether 523 50 100 410 113 65-125 <br /> Toluene 113 5 0 100 ND 113 85-120 <br /> Xylenes(total) 266 5 0 300 ND 89 85-125 <br /> Surrogate 1 2-Dtchloroethane-d4 245 250 98 60-135 <br /> •Matrix Spike Dup(5G29006-MSDI) Source MOG0816-03 Prepared 07/29/05 Analyzed 07/30/05 <br /> tert-Amyl methyl ether 111 50 UgA 100 ND 111 80-115 3 15 <br /> Benzene 116 50 100 ND 116 65-115 5 20 LM <br /> tent-Butyl alcohol 485 200 500 ND 97 75-120 4 25 <br /> Di-isopropyl ether 103 50 100 ND 103 75-125 3 15 <br /> Ethanol 1580 1000 2000 ND 79 70-135 16 35 <br /> Ethyl tert-butyl ether 107 50 100 ND 107 75-130 3 25 <br /> Ethylbenzene 941 50 100 17 92 75-I35 5 15 <br /> Methyl tert-butyl ether 538 50 100 410 128 65-125 3 20 BB,LM <br /> Toluene 120 50 100 ND 120 85-120 6 20 <br /> Xylenes(total) 276 5 0 300 ND 92 85-125 4 20 <br /> Surrogate 12-Dichloroethane-d4 236 250 94 60-135 <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 otherwtse stated results are reported on a wet weight basis <br /> 77its analytical report must be reproduced in its entirety <br /> Page 11 of 12 <br />