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Tive <br /> 885 Lams D <br /> S eq u o.�a Morgan IN 45037037 <br /> ��► Analytical (408)7 -9600 <br /> FAX(408)78292-6308 <br /> www sequoislabs corn <br /> s <br /> URS.Corporation[Arcot] Project BP#11194,Tracy,CA MNHO211 <br /> 2870 Gateway Oaks Dr,Ste 300 Project]dumber NIP Reported <br /> Sacramento CA,95833 Project Manager Jefl'Brooks 08/25/04 13 04 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical -Morgan Hill <br /> Reporting Spike Source 0/.RFC RPD <br /> Analyte Result Limit Units level Result %REC limits RPD Lmit Notes <br /> Batch 4H12002-EPA 5030B PIT <br /> Laboratory Control Sample(4H12002-BS1) Prepared&,Analyzed 08/12/04 <br /> tett-Amyl methyl ether 108 050 ugll 100 108 82-140 <br /> Benzene 10 8 050 100 108 69-124 <br /> tert-Butyl alcohol 52 2 20 500 104 56-131 <br /> Di-isopropyl ether 10 7 050 100 107 76-130 <br /> Ethanol 154 100 200 77 31-143 IC <br /> Ethyl tert-butyl ether 11 4 050 100 114 8I-121 <br /> Ethylbenzene 11 1 050 too 111 84-132 <br /> Methyl tert-butyl ether 10 8 050 100 108 63-137 <br /> Toluene 10 9 050 100 109 78-129 <br /> Xylenes(total) 31 3 050 300 104 83-137 <br /> Surrogate 1 2-Dichloroethane-d4 4 83 500 97 78-129 <br /> AMJ,aboratory Control Sample(4H12002-BS2) Prepared&Analyzed 08/12/04 <br /> asolme Range Organics(C4-C12) 439 50 ug/1 440 100 70-124 <br /> Surrogate 1,2-Dichloroethane-d4 4 11 500 82 78-129 <br /> Laboratory Control Sample Dup(41112002-BSDI) Prepared&Analyzed 08/12/04 <br /> tert-Amyl methyl ether It 2 050 ug/l 100 112 82-140 4 20 <br /> Benzene 11 0 050 100 110 69-124 2 20 <br /> tert-Butyl alcohol 533 20 500 107 56-131 2 20 <br /> Di-isopropyl ether 11 0 050 10 0 110 76-130 3 20 <br /> Ethanol 165 100 200 82 31-143 7 20 <br /> Ethyl tert-butyl ether 114 050 10 0 114 81-121 0 20 <br /> Ethylbenzene 112 050 10 0 112 84-132 0 9 20 <br /> Methyl tert-butyl ether 10 8 050 100 108 63-137 0 20 <br /> Toluene 10 9 050 10 0 109 78-129 0 20 <br /> Xylenes(total) 31 0 050 300 103 83-137 1 20 <br /> Surrogate 12-Drchloroethane-d4 460 500 92 78-129 <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 enurety <br /> Page 12 of 16 <br />