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85 <br /> Drive <br /> 8Sequoia Morgan Hill CA 95037 <br />' (408)776-9600 <br /> Analytical FAX(408)782 6308 <br /> WWW sequotalahs elomAm <br /> URS Corporation rArco11 Project ARCO#0760,Lodi,CA NINK0808 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number G093Z-0461 Reported <br /> Sacramento CA,95833 Project Manager Vem Elarth 12/10/04 17 00 <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 4L08003-EPA 5030B Modified 1 EPA 8260B <br /> Blank(4L08003-BLKI) Prepared&Analyzed 12/08/04 <br /> tent-Amyl methyl ether ND 00050 mg/kg <br /> Benzene ND 00050 <br /> tert-Butyl alcohol ND 0 020 <br /> Di-isopropyl ether ND 00050 " <br /> 1,2-Dibromoethane(EDB) ND 00050 I' <br /> t 2-Dichloroethane ND 00050 <br /> Ethanol ND 010 " <br />' Ethyl tort-butyl ether ND 00050 <br /> Ethylbenzcne ND 00050 <br /> Methyl tort-butyl ether ND 00050 <br /> Toluene ND 00050 " <br />�ylenes(total) ND 00050 " <br /> asolme Range Organics(C4-C12) ND 0 10 <br /> Surrogate 1 2-Dichloroethane-d4 000425 000500 85 78-136 <br /> Laboratory Control Sample(4L08003-BSI) Prepared&Analyzed 12/08/04 <br /> Cert-Amyl methyl ether 00107 0 0050 mg/kg 00100 107 78-135 <br /> Benzene 00106 0 0050 00100 106 59-126 <br />' tert-Butyl alcohol 00598 0 020 ;i 00500 120 20-164 <br /> Di-isopropyl ether 00122 00050 00100 122 72-127 <br /> 1,2-Dibromoethane(EDB) 000971 0 0050 00100 97 83-138 <br /> 1,2-13ichlomethane 000984 00050 00100 98 83-130 <br />' Ethanol 0 181 0 10 0200 90 51-130 <br /> Ethyl tert-butyl ether 00107 00050 00100 107 77-129 <br /> Ethylbenzene 00107 00050 00100 107 60-145 <br /> Methyl cert-butyl ether 00115 00050 " 00100 115 47-149 <br /> Toluene 00108 00050 00100 108 66-142 <br /> Xylenes(total) 00303 00050 00300 101 83-135 <br /> Surrogate 12-Dichloroethan,-d4 00,1446 000500 89 78-136 <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 8 of 13 <br />