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41) (408) <br /> n"i Jarvis D7 <br /> Se uo><a Morgan Hdl CA 9503037 <br /> 776 9600 <br /> Analytical 8)782-6308 wwwww seqequoiala6s coin <br /> URS Corporation[Arco II Project ARCO 46100,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 Hili <br /> Reporting Spike Source %nREC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 5G07035-EPA 5030B PIT/EPA 8260B <br /> Blank(5G07035-BLK2) 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 /> I 2-Dichloroethane ND 050 " <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Ethylbenzene ND 050 " <br /> Methyl tert-butyl ether ND 050 " <br /> Toluene ND 050 <br /> W <br /> lenes(total) ND 050 <br /> some Range Organics(C4-C 12) ND 50 <br /> Surrogate 12-Dichloroethane-d4 125 250 40 60-135 <br /> Laboratory Control Sample(5G07O35-BSI) Prepared&Analyzed 07/07/05 <br /> tert-Amyl methyl ether 963 050 ug/l 100 96 80-115 <br /> Benzene 969 050 100 97 65-115 <br /> tert-Butyl alcohol 444 20 500 89 75-150 <br /> Di-isopropyl ether 931 050 too 93 75-125 <br /> 1,2-Dibromoethane(EDB) 105 050 100 105 85-120 <br /> 1 2-Dichloroethane 963 050 too 96 85-130 <br /> Ethanol 277 100 200 138 70-135 IC HL <br /> Ethyl ter(-butyl ether 896 050 too 90 75-130 <br /> Ethylbenzene 11 2 050 100 112 75-135 <br /> Methyl tert-butyl ether 8 88 050 too 89 65-125 <br /> Toluene 10 3 050 100 103 85 120 <br /> Xylenes(total) 340 050 300 113 85-125 <br /> Surrogate 1 2-Drchloroethane-d4 2 17 250 87 60-135 <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 u et weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 11 of 17 <br />