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885 Jarvis Drive <br /> Sequoia Morgan H11 CA 95037 <br /> + (408)776 9600 <br /> Analytical <br /> FAX labscoin <br /> URS Corporation rArcoll Project ARCO#6100,Tracey,CA MOL0796 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number GOC 1 Y-0005 Reported <br /> Sacramento CA,95833 Project Manager Jay Johnson 01/16/06 16 27 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %RFC APD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 5L28007-EPA 5030E PIT 1 EPA 8260B <br /> Blank(5L28007-BLKI) Prepared&Analyzed 12/28/05 <br /> Cert-Amyl methyl ether ND 050 ugll <br /> Benzene ND 0 50 " <br /> tert-Butyl alcohol ND 50 " <br /> Di-isopropyl ether ND 050 " <br /> 1,2-Dibromoethane(EDB) ND 0 50 " <br /> 1,2-Dichloroethane ND 050 " <br /> Ethanol ND 100 " <br /> Cthyl tert-butyl ether ND 050 " <br /> Ethylbenzene ND 050 " <br /> Methyl tert-butyl ether ND 050 " <br /> Toluene ND 050 " <br /> Ises(total) ND 050 <br /> me Range Organics(C4-C12) ND 50 <br /> Surrogate 12-Dichloroethane-d4 4 13 5 00 83 60-135 <br /> Laboratory Control Sample(5L28007-BSI) Prepared&Analyzed 12/28/05 <br /> tert-Amyl methyl ether 763 0 50 ug/l 752 101 80-115 <br /> Benzene 268 0 50 258 104 65-115 <br /> tert-Butyl alcohol 783 5 0 71 6 109 75-150 <br /> Di-isopropyl ether 8 56 050 756 113 75-125 <br /> 1,2-Dibromoethane(EDB) 947 050 744 114 85-120 <br /> 1 2-Dichloroethane 742 050 736 101 85-130 <br /> Ethanol 553 100 708 78 70-135 <br /> Ethyl tert-butyl ether 769 050 752 102 75-130 <br /> Ethylbenzene 3 30 050 3 77 88 75-135 <br /> Methyl tert-butyl ether 3 59 050 3 51 102 65-125 <br /> Toluene 189 050 18 6 102 85-120 <br /> Xylenes(total) 189 050 206 92 85-125 <br /> Gasoline Range Organics(C4-C12) 196 50 220 89 60-140 <br /> Surrogate 1,2-Drchloroelhane-d4 445 500 89 60-135 <br /> uoia Analytical - Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise staled results are reported on a wet weight bases <br /> This analytical report must be reproduced in its entirety <br /> Page 8 of 19 <br />