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819 Striker Avenue Suite 8 <br /> Sequoia <br /> Sacramento,CA 95834 <br /> �C(lUQia (916)921-9600 <br /> Analytical FAX(916)921-0 100 <br /> qW www sequoialabs com <br /> Amok <br /> ella Environmental Consultants(Cameron Park) Project ARCO 2186, Stockton,CA <br /> 3330 Cameron Park Dr Ste 550 Project Number N/A Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 10/08/01 15 39 <br /> Volatile Organic Oxygenated Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical - San Carlos <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1090105-EPA 5030B IP/T] <br /> Blank 1090105-BLKI Pre ared&Analyzed 09/25/01 <br /> Ethanol ND 1000 ugA <br /> Tert-butyl alcohol ND 100 <br /> Methyl tert-butyl ether ND 2 0 " <br /> Di-isopropyl ether ND 2 0 " <br /> Ethyl tert-butyl ether ND 2 0 " <br /> Tert-amyl methyl ether ND 2 0 <br /> Surrogate 12-Dtchloroethane-d4 428 500 85 6 76-114 <br /> Blank(1090105-BLK2) Prepared&Analyzed 09/26/01 <br /> Ethanol ND 1000 ug/l <br /> Tert-butyl alcohol ND 100 " <br /> Methyl Cert-butyl ether ND 20 <br /> Di-isopropyl ether ND 2 0 " <br /> Othy]tort-butyl ether ND 2 0 <br /> ert-amyl methyl ether ND 2 0 " <br /> Surrogate 11-Dtchloroethane-d4 51 0 500 102 76-114 <br /> LCS(1090105-BSI) Prepared&Analyzed 09/25/01__ _ <br /> Methyl tert-butyl ether 469 20 ug/l 50 0 93 8 70-130 <br /> Surrogate 12-Dtchloroethane-d4 465 500 93 0 76-114 <br /> LCS(1090105-BS2) Prepared&Analyzed 09/26/01 <br /> Methyl tert-butyl ether 53 1 20 ug/l 500 106 70-130 <br /> Surrogate 1 2-Dtchloroethane-d4 519 " 500 104 76-114 <br /> Matrix Spike 1090105-MSI) Source L109084-02 Prepared&Analyzed 09/25/01 <br /> Methyl tett-butyl ether 60 6 20 ug/1 500 18 85 2 60-140 <br /> Surrogate 1 2 Dtchloroethane-d4 44 5 500 89 0 76-114 <br />. Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document This analytical report must be reproduced in its entirety <br /> Page Page 11 of 13 <br />