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1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma,CA 94954 <br /> (707)79z-1865ls6s <br /> iq Analytical FAX www sequot 792 Dalabs co <br /> mrn <br /> �} uoi <br /> URS Corp-Sacramento Project BP Heritage Site 11194,Tracy,Ca P310692 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36365 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 11/14/03 15 55 <br /> Volatile Organic Compounds by EPA Method 8260B-Quality Control <br /> Sequoia Analytical-Petaluma <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3110188-EPA 5030 waters <br /> Blank 3110188-BLKI Pre ared&Analyzed 11/11/03 <br /> Tert-amyl methyl ether ND 1 0 ug/l <br /> Benzene ND 0 50 " <br /> Tert-butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 1 0 " <br /> Ethanol ND 100 " <br /> Ethylbenzene ND 0 50 <br /> Ethyl tert-butyl ether ND 1 0 " <br /> Methyl ten-butyl ether ND 0 50 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> urrogate Dtbromofluoromethane 4 62 450 103 84-122 <br /> ragate 12-Drchloroethane d4 4 09 I, 450 91 74-135 <br /> urrogate Toluene-d8 497 450 110 84-119 <br /> Laboratory Control Sample(3110188-BSI) Prepared&Analyzed 11/11/03 <br /> Tert-amyi methyl ether 431 1 0 ug/l 5 00 86 70-116 <br /> Benzene 4 58 050 5 00 92 81-118 <br /> Tert-butyl alcohol 900 20 100 90 62-142 <br /> Di-isopropyl ether 3 96 1 0 5 00 79 71-121 <br /> Ethanol 173 i00 100 173 65-135 Q-29 <br /> Ethylbenzene 4 87 050 5 00 97 89-122 <br /> Ethyl tert-butyl ether 406 1 0 500 81 71-110 <br /> Methyl tert-butyl ether 3 98 0 50 5 00 80 77-123 <br /> Toluene 4 73 0 50 500 95 84-119 <br /> Xylenes(total) 149 0 50 15 0 99 86-132 <br /> Surrogate Dibromofluoromethane 460 450 102 84-122 <br /> Surrogate 12-Drchloroethane d4 3 98 450 88 74-135 <br /> Surrogate Toluene-d8 5 07 450 113 84-119 <br /> equola Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> Page 16 of 22 <br />