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1885 Jarvis Drive <br /> Sequoia MorganHd] CA 95037 <br /> (408)776 9600 <br /> mW Analytical W 8)782 6308 <br /> wwwW seq sequoialabs com <br /> URS Corporation[ArcoI I Project ARCO#5469,Stockton,CA MOF0335 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number G09JZ-0290 Reported <br /> Sacramento CA,95833 Project Manager Jay Johnson 06/23/05 15 34 <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 5F15005- EPA 5030E PIT 1 EPA 8260E <br /> Laboratory Control Sample Dup(5F15005-BSD1) Prepared&Analyzed 06/15/05 <br /> Surrogate 12-Dtchloroethane-d4 518 49/1 500 104 60-135 <br /> Matrix Spike(5F15005-MSI) Source MOF0335-04 Prepared&Analyzed 06/15/05 <br /> Benzene 312 25 ug/1 304 30 93 65-115 <br /> Ethylbenzene 372 25 392 ND 95 75-135 <br /> Methyl tert-butyl ether 3111) 25 480 2000 231 65-125 B8,LM <br /> Toluene 1790 25 1640 ND 109 85-120 <br /> Xylenes(total) 2050 25 1920 ND 107 85-125 <br /> Gasoline Range Organics(C4 C12) 21900 2500 22000 1700 92 70-124 <br /> Surrogate 12-Dtchloroethane-d4 519 5 00 104 60-135 <br /> Matrix Spike Dup(5F15005-MSD]) Source MOF0335-04 Prepared&Analyzed 06/15/05 <br /> Benzene 306 25 ug/l 304 30 91 65-115 2 20 <br /> Ethylbenzene 370 25 392 ND 94 75-135 05 15 <br /> Methyl tert-butyl ether 2890 25 480 2000 185 65-125 7 20 BB LM <br /> Toluene 1770 25 1640 ND 108 85-120 1 20 <br /> Xylenes(total) 2140 25 1920 ND Ill 85-125 4 20 <br /> Gasoline Range Organics(C4 C12) 22300 2500 22000 1700 94 70-124 2 20 <br /> Surrogate 1 2-Dichloroethane-d4 458 500 92 60-135 <br /> Batch 5F16006-EPA 5030B PIT I EPA 82608 <br /> Blank(5F I 6006-BLK 1) Prepared&Analyzed 06/16/05 <br /> tert-Amyl methyl ether ND 050 ugfl <br /> Benzene ND 050 " <br /> tert-Butyl alcohol ND 50 " <br /> Di-isopropyl ether ND 050 " <br /> 1,2-Dibromoethane(EDB) ND 050 <br /> l 2-Dtchloroethane ND 050 " <br /> Ethanol ND t00 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Ethylbenzene ND 050 " <br /> Methyl tert-butyl ether ND 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C4-C12) ND 50 " <br /> Surrogate 12-Dichloroeihane-d4 466 500 93 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 wet weight basis . <br /> This analytical report must be reproduced in its entirety <br /> Page 14 of 20 <br />