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1885 Jarvis]hive <br /> 4DSequoia Morgan Hill,CA 95037 <br /> (408)776-9600 <br /> Analytical WW scq 8) labs82 cG 8 <br /> WWW sequotalabs cam <br /> i <br /> URS Corporation[Arco]] Protect BP Hentage#11194,Tracy,CA MOU0245 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number G07WZ-0011 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 08/19/05 06 53 <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 5H09043-EPA 5030B PIT 1 EPA 8260B <br /> Blank(5H09043-BLKI) Prepared&Analyzed 08/09/05 <br /> tert-Amyl methyl ether ND 050 ugll <br /> Benzene ND 050 " <br /> tert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 050 " <br /> Ethanol ND 100 " <br /> Ethyl ten-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-C12) ND 50 " <br /> Surrogate 1 2-Dichloroethone-d4 234 250 94 60-135 <br /> aboratory Control Sample(5H09043-BSI) Prepared&Analyzed 08/09/05 <br /> "Wpltett-Amyl methyl ether 923 050 USA 100 92 80-115 <br /> Benzene 112 050 100 112 65-115 <br /> tert-Butyl alcohol 448 20 500 90 75-150 <br /> Di-isopropyl ether 952 050 100 95 75-125 <br /> Ethanol 112 100 200 56 70-135 HM <br /> Ethyl tert-butyl ether 929 050 100 93 75-130 <br /> Ethylbenzene 11 ] 0 50 W0 111 75-135 <br /> Methyl tert-butyl ether 896 0 50 Wo 90 65-125 <br /> Toluene 114 050 Wo 114 85-120 <br /> Xylenes(total) 350 050 300 117 85-125 <br /> Surrogate 1 2-Dichloroethane-d4 217 250 87 60-135 <br /> Laboratory Control Sample(5H09043-BS2) Prepared&Analyzed 08/09/05 <br /> Benzene 5 96 050 agll 608 98 65-115 <br /> Ethylbenzene 873 050 7 84 111 75-135 <br /> Methyl tent-butyl ether 807 050 9 60 84 65-125 <br /> Toluene 36 1 050 329 1]0 85-120 <br /> Xylenes(total) 428 050 385 1]] 85-125 <br /> Gasoline Range Organics(C4-C12) 479 50 440 109 70-124 <br /> Surrogate 1 2-Dichloraerhane-d4 248 250 99 60-13S <br /> Sequoia Analytical-Morgan Htll 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 12 of 16 <br />