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Sequoia 895Jarvis Dnvc <br /> Hi <br /> Morgan Hill CA 95435037 <br /> Analytical (4081776-6300 <br /> FAX(408)782-6348 <br /> 0 www sequoinlabs cum <br /> URS Corporation[Arcol l Project ARCO#5469,Stockton,CA MPFO114 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number GOBZP-0010 Reported <br /> Sacramento CA,95833 Project Manager Jay Johnson 06/30/06 11 12 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reponing Spike Source %REC RPD <br /> Analyte Kcsuli Limit Units Level Result 06REC Limits RPD Limit Notes <br /> Batch 6F08011 -EPA S030B PIT/EPA 8260B <br /> Blank(6FO801 I-BLKI) Prepared&Analyzed 06/08/06 <br /> tert-Amyl methyl ether ND 050 ugl€ <br /> Benzene ND 050 <br /> tert-Butyl alcohol ND 50 " <br /> Di-isopropyl ether ND 050 " <br /> 12-Dibromoethane(EDB) ND 0 50 " <br /> 12-Dichloroelhane ND 050 " <br /> Ethanol ND 100 <br /> Ethyl Cert-butyl ether ND 050 <br /> Ethylbenzene ND 0 50 <br /> Methyl tert-butyl ether ND 050 <br /> Toluene ND 050 <br /> 40'cries(total) ND 050 <br /> soline Range Organics(C4 C12) ND 50 " <br /> Surrogate 12 Drchloroethane-d4 4 51 5 00 90 60-135 <br /> Surrogate Toluene-d8 447 500 89 70-110 <br /> Surrogate Dibromofluoromethane 465 5 00 93 65-130 <br /> Surrogate 4-Bromofluorobenaene 458 " 500 92 70-110 <br /> Laboratory Control Sample(6FO8011-BS1) Prepared&Analyzed 06/08/06 <br /> tert-Amyl methyl ether 150 0 50 ugA 150 too 80 115 <br /> Benzene 503 0 50 5 16 97 65-115 <br /> telt-Butyl alcohol 164 50 143 115 75-150 <br /> Di-isopropyl ether 144 050 15 1 95 75 125 <br /> 1 2 Dibromoetharie(EDB) €5 7 0 50 149 105 85-120 <br /> 1 2 Dichloroethane 146 0 50 14 7 99 85 130 <br /> Ethanol 156 100 142 110 70-135 <br /> Ethyl tert-butyl ether 153 050 €5 0 102 75-130 <br /> Ethylbenzene 745 0 50 754 99 75-135 <br /> Methyl tent butyl ether 7 17 050 702 102 65-125 <br /> Toluene 375 0 50 372 101 85 120 <br /> Xylenes(total) 41 6 0 So 412 lot 85-125 <br /> Gasolme Range Organics(C4 C12) 440 50 440 100 60-140 <br /> Surrogate 1 2-Drchloroethane-d4 4 70 500 94 60-135 <br /> Surrogate Toluene-d8 4 60 " 5 00 92 70-110 <br /> Surrogate Dibromofluoromethane 4 79 5 00 96 65-130 <br /> Surrogate 4-Bromofluorobemene 4 68 5 00 94 70-120 <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 basis <br /> This analytical report must be reproduced in its entirety <br /> Page 16 of 20 <br />