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q 18$5 Jarvis Drive <br /> Se UQIa Morgan HillCA 95037 <br /> eD— (408)776-9600 <br /> Analytical FAX(408)782 6308 <br /> WWW sequoialabs com <br /> URS Corporation[Arcot 1 Project ARCO#6100,Tracey,CA MOF0786 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number GOC IY-0003 Reported <br /> Sacramento CA,95833 Project Manager Jay Johnson 07/22/05 16 37 <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 Leve] Result %REC Limits RPD Limit Notes <br /> Batch 5GO1012-EPA 5030B P/T/EPA 8260B <br /> Laboratory Control Sample Dup(5GO1012-BSD1) Prepared 07/01/05 Analyzed 07/02/05 <br /> Surrogate 12-Dichloroeihane-d4 134 ug/l 250 94 60-135 <br /> Matrix Spike(5G01012-MSI) Source MOF0786-01 Prepared 07/01/05 Analyzed 07/02/05 <br /> Benzene 599 050 ug/I 608 ND 99 65-115 <br /> Ethylbenzene 884 050 784 ND H3 75-135 <br /> Methyl tert-butyl ether 925 050 960 ND 96 65-125 <br /> Toluene 357 050 329 ND 109 85-120 <br /> Xylenes(total) 463 050 385 24 114 85-125 <br /> Gasoline Range Organics(C4-C]2) 306 50 440 14 66 70-124 LN <br /> Surrogate 12-Drchloroethane-d4 233 250 93 60-135 <br /> Matrix Spike Dup(5GO1012-MSD1) Source MOF0786-01 Prepared 07/01/05 Analyzed 07/02/05 <br /> W,nzene 5 91 0 50 ug/I 6 08 ND 97 65-l15 1 20 <br /> ylberizene 90 1 <br /> 01 0 50 784 ND 115 75-135 2 l5 <br /> Methyl tert butyl ether 904 050 960 ND 94 65-125 2 20 <br /> Toluene 36 1 050 329 ND 110 85-120 1 20 <br /> Xylenes(total) 462 050 38 5 24 114 85-125 02 20 <br /> Gasoline Range Organics(C4-C 12) 303 50 440 14 66 70-124 1 20 LN <br /> Surrogate 12-Drchloroethane-d4 231 250 92 60-135 <br /> Batch 5GO7035-EPA 5030E PIT I EPA 8260B <br /> Blank(5G07035-BLKI) Prepared&Analyzed 07/07/05 <br /> tert-Amyl methyl ether ND 050 ug/l <br /> Benzene ND 050 " <br /> tert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 050 " <br /> I 2-Dibromoethane(EDB) ND 050 <br /> l 2-Dichloroethane ND 050 <br /> Ethanol ND 100 1C <br /> Ethyl tert-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-C 12) ND 50 " <br /> Surrogate 12-Drchloroethane-d4 223 250 89 60-135 <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analy_ed 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 10 of 17 <br />