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. 885 Jarvis Drive <br /> S e 4Dq u o l a Morgan( 5037 <br /> 408)776-9600 <br /> iW Analytical FAX(408)782-6308 <br /> 0 www sequoialabs corn <br /> URS Corporation[Arcot] Project BP Heritage#11194,Tracy,CA MOE02I7 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number G07WZ-001 I Reported <br /> Sacramento CA,95833 Project Manager Jeff Brooks 05/19/05 16 42 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical -Morgan Hill <br /> Reporting Spike Source %REG RPD <br /> Analyte Result Lirrut Units Level Result %REC Limits RPD Limit Notes <br /> Batch 5E12009-EPA 5030B PIT/EPA 8260B <br /> Laboratory Control Sample Dup(5E12009-ESDI) _ Prepared 05/12/05 Analyzed 05/13/05 <br /> tert-Amyl methyl ether 950 050 ug/l 100 95 80-115 6 Is <br /> Bcnzenc 965 050 100 96 65-115 6 20 <br /> tert-Butyl alcohol 524 20 1, 500 105 75-150 3 25 <br /> Di-isopropyl ether 101 050 100 101 75-125 3 15 <br /> Ethanol 159 100 200 80 70-135 22 35 <br /> Ethyl tert-butyl ether 991 050 100 99 75-130 4 25 <br /> Ethylbenzene 102 050 100 102 75-135 6 15 <br /> Methyl tert-butyl ether 101 050 100 101 65-125 1 20 <br /> Toluene 102 050 100 102 85-120 10 20 <br /> Xylenes(total) 307 050 300 102 85-125 5 20 <br /> Surrogate 12-Dichloroethane-d4 4 71 500 94 60-135 <br /> Matnx Spike(SE12009-MSI) Source MOE0217-03 Prepared 05/12/05 Analyzed 05/13/05 <br /> Benzene 253 25 119/1 304 12 79 65-115 <br /> Ethylbenzene 386 25 392 ND 98 75-135 <br /> Methyl tert-butyl ether 440 25 480 35 91 65-125 <br /> Toluene 1670 25 1640 ND 102 85-120 <br /> Xylenes(total) 2000 25 1920 ND 104 85-125 <br /> Gasoline Range Organics(C4-C12) 21700 2500 22000 2000 90 70-124 <br /> Surrogate 1,2-Dichloroethane-d4 460 500 42 60-135 <br /> Matrix Spike Dup(5E12009-MSDI) Source MOE0217-03 Prepared 05/12/05 Analyzed 05/13/05 <br /> Benzene 266 25 ug/l 304 12 64 65-115 5 20 <br /> Ethylbenzene 409 25 392 ND 104 75-135 6 15 <br /> Methyl tent-butyl ether 446 25 480 35 92 65-125 1 20 <br /> Toluene 1760 25 1640 ND 107 85-120 5 20 <br /> Xylenes(total) 2090 25 1920 ND 109 85-125 4 20 <br /> Gasoline Range Organics(C4-C 12) 23000 2500 22000 2000 95 70-124 6 20 <br /> Surrogate 12-Dichloroethane-d4 451 500 90 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 othermse staled results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 7 of 10 <br />