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a1 � <br /> ., 1885 Drive <br /> Sequoia Morgan Hill <br /> CA CA 950375037 <br /> (408)776 9600 <br /> Analytical FAX 782 6308 <br /> www scquoequosalabs com <br /> URS Corporation[Arcot) Project BP Heritage##11191,Stockton,CA MOG0813 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number G07WW-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 %REG Limits RPD Limit Notes <br /> Batch 5G28004-EPA 5030B P/T/EPA 8260B <br /> Matrix Spike Dup(5G28004-MSDI) Source MOG0812-11 Prepared&Analyzed 07/28/05 <br /> Benzene 308 25 ug/l 304 ND 101 65-115 2 20 <br /> Ethylbenzene 372 25 392 ND 95 75-135 2 15 <br /> Methyl tert-butyl ether 323 25 48 0 310 27 65-125 2 20 BB,LN <br /> Toluene 192 2 5 164 ND 117 85-120 2 20 <br /> Xylenes(total) I82 2 5 192 ND 95 85-125 2 20 <br /> Gasoline Range Organics(C4-C 12) 2430 250 2200 170 103 70-124 2 20 <br /> Surrogate 12-Dichloroethane-d4 138 250 95 60-135 <br /> Batch 5G29006-EPA 5030B PIT I EPA 8260B <br /> Blank(5G29006-BLK1) Prepared&Analyzed 07/29/05 <br /> tert-Amyl methyl ether ND 050 ug,9 <br /> Benzene ND 050 " <br /> •tert-Duty)alcohol ND 20 <br /> Di-isopropyl ether ND 0 50 <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 050 <br /> Ethylbenzene ND 050 <br /> Methyl tert-butyl ether ND 050 " <br /> Toluene ND 050 <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C4-C 12) ND 50 <br /> Surrogate 1 2-Dichloroethane-d4 244 250 98 60-135 <br /> Blank(5G29006-BLK2) Prepared&Analyzed 07/29/05 <br /> ten-Amyl methyl ether ND 050 ugA <br /> Benzene ND 050 <br /> tert-Butyl alcohol ND 20 <br /> Di-isopropyl ether ND 0 50 " <br /> Ethanol ND 100 <br /> Ethyl tert-butyl ether ND 050 <br /> Ethylbenzene ND 050 <br /> Methyl tent-butyl ether ND 050 <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C4-C 12) ND 50 " <br /> Surrogate 1 2-Dichloroethane-d4 236 150 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 otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 9 of 12 <br />