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i <br /> i <br /> 15) <br /> q 8Hi l CA Ihwe <br /> SQ l101a Morgan Hill CA 95037 <br /> (408)776-9600 <br /> FAX 09 <br /> IW Analytical wwse 68ialabs am <br /> www sequotalabs cam <br /> 40 <br /> URS Corporation [Arco 1 I Project ARCO 46100,Tracey,CA MOL0796 <br /> 2870 Gateway Oaks Dr, Ste 300 Project Number GOCIY-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 %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 5L28007-EPA 5030B PIT/EPA 8260B <br /> Matrix Spike(5L28007-MSI) Source MOL0652-08 Prepared&Analyzed 12/28/05 <br /> tert-Amyl methyl ether 83 5 50 ug/I 752 9 1 99 80-115 <br /> Benzene 593 50 25 8 570 89 65-115 <br /> tert-Butyl alcohol 757 50 716 ND 106 75-120 <br /> Di-isopropyl ether 806 5 0 75 6 ND 107 75-125 <br /> 1 2-Dtbromoethane(EDB) 812 5 0 74 4 ND 109 85-120 <br /> 1 2-Dtchloroethane 701 5 0 736 ND 95 85-130 <br /> Ethanol 799 1000 708 110 97 70-135 <br /> Ethyl tert-butyl ether 76 1 5 0 752 ND 101 75-130 <br /> Ethylbenzene 190 5 0 377 160 80 75-135 <br /> Methyl tert-butyl ether 130 5 0 35 1 98 91 65-125 <br /> Toluene 233 5 0 186 43 102 85-120 <br /> Des(total) 296 5 0 206 110 90 85-125 <br /> the Range Organics(C4-C12) 8700 500 2200 6800 86 60-140 <br /> Surrogate 12-Dichloroethane-d4 489 5 00 98 60-135 <br /> Matrix Spike Dup(5L28007-MSD1) Source MOL0652-08 Prepared&Analyzed 12/28/05 <br /> tert-Amyl methyl ether 849 5 0 ugfl 75 2 9 1 101 80-115 2 15 <br /> Benzene 564 5 0 25 8 570 0 65-115 5 20 BB,LN <br /> tert-Butyl alcohol 877 50 716 ND 122 75-120 15 25 LM <br /> Di-isopropyl ether 806 5 0 75 6 ND 107 75-125 0 15 <br /> 1,2-Dtbromoethane(EDB) 830 5 0 744 ND 112 85-120 2 15 <br /> 1 2-Dtchloroethane 652 5 0 73 6 ND 89 85-130 7 20 <br /> Ethanol 997 1000 708 110 125 70-135 22 35 <br /> Ethyl ten-butyl ether 746 5 0 752 ND 99 75-130 2 25 <br /> Ethylbenzene 178 5 0 377 160 48 75-135 7 15 BB LN <br /> Methyl tert-butyl ether 130 5 0 35 1 98 91 65-125 0 20 <br /> Toluene 226 50 186 43 98 85-120 3 20 <br /> Xylenes(total) 288 5 0 206 110 86 85-125 3 20 <br /> Gasoline Range Organics(C4-C12) 7690 500 2200 6800 40 60-140 12 25 LN <br /> Surrogate 1,2-Drchloroethane-d4 448 5 00 90 60-135 <br /> uola Analytical -Morgan Hill The results in this report apply to the samples analysed in accordance with the chain of <br /> 10 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 9 of 19 <br />