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Sq 8851 LCA 5037 <br /> equoia 0i� Morgan]illi A 95037 <br /> (408)776 9600 <br /> .� Analytical FAX(408)7826308 <br /> www sequoialabs nom <br /> URS Corporation(Arcol) Project BP Heritage#11191,Stockton,CA MPA1167 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number G07WW-0016 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 02/10/06 14 48 <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 RPP Limit Notes <br /> Batch 6A30031 -EPA 5030E P/T/EPA 8260B <br /> Laboratory Control Sample Dup(6A30031-BSD1) Prepared&Analyzed 01/30/06 <br /> Toluene 407 050 ug/1 390 107 85-120 0 20 <br /> Xylenes(total) 41 1 050 409 101 85-125 2 20 <br /> Gasoline Range Organics(C4-C12) 404 50 440 92 60-140 02 25 <br /> Surrogate 1 2-Diehloroethune-d4 416 500 83 60-135 <br /> Batch 6A31010-EPA 5030B P/T 1 EPA 8260B <br /> Blank(6A31010-BLK1) Prepared&Analyzed 01/31/06 <br /> tert Amyl methyl ether ND 050 ug/I <br /> BLnLLne ND 0 50 <br /> tert-Butyl alcohol ND 20 <br /> Di-isopropyl ether ND 050 " <br /> Ethanol ND 300 <br /> thyl tert butyl ether ND 0 50 <br /> Ethylbcnzene ND 050 <br /> Methyl tert-butyl ether ND 050 <br /> 1 oluene ND 050 " <br /> XylcnLs((otal) ND 050 <br /> Gasoline Range Organics(C4-C12) ND 50 " <br /> Surrogate 1 2 Dichloroctham-d4 467 500 93 60-135 <br /> Laboratory Control Sample(6A31010-BSI) Prepared&Analyzed 01/31/06 <br /> Cert-Amyl methyl ether 168 050 ugll 16 3 103 80-115 <br /> BLrizenc 4 71 050 504 93 65-115 <br /> tert-Butyl alcohol 151 20 169 89 75-150 <br /> Di-isopropyl ether 15 8 0 50 16 2 98 75-125 <br /> Ethanol 118 300 165 72 70-135 <br /> Fthyl tert butyl ether 15 8 050 164 96 75-130 <br /> Ethylbenzene 636 050 728 87 75-135 <br /> Methyl tert-butyl ether 7 18 0 50 7 84 92 65-125 <br /> Toluene 396 0 50 380 104 85-120 <br /> Xylenes(total) 388 050 408 95 85-125 <br /> Gasoline Range Organics(C4 C 12) 388 50 440 88 60-140 <br /> Surrogate 1 2-Dichloroethane-d4 4 72 500 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 basiy <br /> This analytical report must be reproduced in its entirety <br /> Page 8 of 10 <br />