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Drive <br /> a- —) <br /> 885 Jarvis 9600Se(�UDIa Morgan Hill CA 95037 <br /> `1 {405}776 9600 Analytical MX Lelu 782 6308 <br /> • www s�quutalabs cnm <br /> Pio ect MPC0315 <br /> URS Corporation lArcol� J ARCO#5469,Stockton,CA <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number GOBZP-0010 Reporters <br /> Sacramento CA,95833 Project Manager Jay Johnson 03/30/06 14 47 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %RFC RPD <br /> Analyte Result Limit Units Level Result %RLC Limits RPD Limn Nates <br /> Batch 6C20002-EPA 5030B PIT I EPA 8260B <br /> Blank(6C20002-BLK1) Prepared&Analyzed 03/20/06 <br /> tert-Amyl methyl ether ND 050 ug/l <br /> Benzene ND 050 " <br /> tert-Butyl alcohol ND 20 <br /> Dt isopropyl ether ND 050 " <br /> 12-Dibromoethane(EDB) ND 050 " <br /> 1 2-Dichloroethane ND 050 <br /> Ethanol ND 300 " <br /> Ethyl tert-butyl ether ND 050 <br /> Ethylbenzene ND 050 <br /> Methyl tent-butyl ether ND 050 " <br /> Toluene ND 0 50 <br /> Xylenes(total) ND — 050 - — — -- v- <br /> Gasoline Range Organics(C4-C]2) ND 50 <br /> Surrogate 12 Dichloroethane d4 489 500 98 60-135 <br /> Surrogate Toluene-d8 524 500 10') 70-120 <br /> Surrogate, DibromofluoromethemL 5 07 500 101 65-130 <br /> Surrogate, 4-Bromofluorobenzene, 4 94 5 00 99 70-120 <br /> Laboratory Control Sample(6C20002-BSI)— Prepared&Analyzed 03/20/06 <br /> Cert Amyl methyl ether 146 050 ug/1 163 90 80 115 <br /> BCRCene 5 05 050 504 100 G5-115 <br /> tert Butyl alcohol 147 20 169 87 75-150 <br /> Di-isopropyl ether 156 050 162 96 75-125 <br /> 12 Dtbromoethane(EDB) 15 3 050 166 92 85-120 <br /> l 2 Dichloroethane 14 9 050 15 5 96 85-130 <br /> Ethanol 133 300 165 81 70 135 <br /> Ethyl tert-butyl ether 15 3 050 16 4 93 75-130 <br /> Ethylbenzene 7 50 0 50 728 103 75-135 <br /> Methyl tert butyl ether 726 050 7 84 93 65-125 <br /> Toluene 31 3 050 380 82 85-120 HM <br /> Xylenes(total) 41 4 050 408 101 85 125 <br /> Gasoline Range Organics(C4-C 12) 398 50 440 90 _ 60-140 <br /> Surrogate, 1 2-Dichloroethane-d4 4 58 500 92 60-135 <br /> Surrogate Toluene-d8 499 500 100 70-120 <br /> Surrogate Dibromofluoromethanr. 469 .500 94 65 130 <br /> Surrogate 4 Bromofluorobenzene 504 500 101 70 120 <br /> Sequoia Analytical - Morgan Hill The results m this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated resultr are rcporled on a wet weight bases <br /> This analytreal report must be reproduced in its entirety <br /> Page 23 of 29 <br />