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Drive <br /> 8Hi Jarvis <br /> Sequoia Morgan Hill CA 950375037 <br /> (E) <br /> (408)776-9600 <br /> Analytical FAX(408)782 6308 <br /> www sequoialabs com <br /> • <br /> URS Corporation rArcoII Project ARCO#5469,Stockton,CA M000479 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number G09JZ-0290 Reported <br /> Sacramento CA,95833 Project Manager Jay Johnson 04/07/05 12 53 <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 5C29006-EPA 5030B PIT/EPA 8260B <br /> Laboratory Control Sample Dup(5029006-BSD1) Prepared&Analyzed 03/29/05 <br /> Surrogate 12-Dichloroethane-d4 542 trg/1 500 108 60-135 <br /> Matrix Spike(5C29006-MSI) Sours e M000479-08 Prepared&Analyzed 03/29/05 <br /> Benzene 1790 100 ug/I 1280 600 93 65-115 <br /> Ethylbenzene 1650 100 1500 ND 110 75-135 <br /> Methyl tert-butyl ether 24900 100 1980 23000 96 65-125 E <br /> Toluene 6520 100 6380 ND 102 85-120 <br /> Xylenes(total) 8670 100 7310 ND 119 85-125 <br /> Gasoline Range Organics(C4-C12) 104000 10000 88000 27000 88 70-124 <br /> Surrogate 12-Dtchloroethane-d4 530 500 106 60-135 <br /> ItixSpike Dup(5C29006-MSD1) Source M000479-08 Prepared 03/29/05 Analyzed 03/30/05 <br /> ne1780 100 ugll 1280 600 92 65-115 0 6 20 <br /> yenzene 1600 100 1500 ND 107 75-135 3 15 <br /> Methyl tert-butyl ether 24500 100 1980 23000 76 65-125 2 20 E <br /> Toluene 6390 100 6380 ND 100 85-120 2 20 <br /> Xylenes(total) 8140 100 7310 ND 111 85-125 6 20 <br /> Gasoline Range Organics(C4-C 12) 101000 10000 88000 27000 84 70-124 3 20 <br /> Surrogate 12-Dtchloroethane-d4 528 Soo 106 60-135 <br /> Batch 5C30005-EPA 5030B P/T/EPA 82608 <br /> Blank(5C30005-BLKI) Prepared&Analyzed 03/30/05 <br /> tert-Amyl methyl ether ND 050 ug/1 <br /> Benzene ND 050 " <br /> tert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 0 50 " <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> 1,2-Dtchloroethane ND 0 50 " <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Methyl tert-butyl ether ND 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Gasoline Range Organics(C4-C 12) ND 50 " <br /> Surrogate 12-Dichloroethane-d4 5 61 500 112 60-135 <br /> A1111111116, — <br /> nota 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 wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 23 of 30 <br />