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Sequoia an CarloIndustrialCA <br /> 4D (650) <br /> ` San Carlos,CA 94070 <br /> Analytical 232-9600 <br /> 1 FAX(650)232-9612 <br /> Nvww sequvialabs cont <br /> Gettler-Ryan/Geostrategies(1) Project iUnocal(4) L208033 <br /> 6747 Sierra Court, Suite J Project Number Former Unocal#0187 Stockton i Reported <br /> Dublin CA 94568 Project Manager Deanna Harding 08/29/02 07 10 <br /> Volatile Organic Oxygenated Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - San Carlos <br /> T " Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Lunrt Notes <br /> Batch 2080016 - EPA 5030B JPITJ <br /> Blank(2080016-BLKI) Prepared&Analyzed 08/15/02 <br /> Ethanol ND 500 ug/1 <br /> Ten-butyl alcohol ND 20 " <br /> Methyl Cert-butyl ether ND 10 " <br /> Di-isopropyl ether ND 10 <br /> Ethyl tert-butyl ether ND 10 " <br /> Tert-amyl methyl ether ND 10 t <br /> Surrogate 1,2-Dichloroethane-d4 S74 500 115 70-130 <br /> Laboratory Control Sample(2080016-BSI) Prepared&Analyzed 08/15/02 <br /> Methyl tert-butyl ether 580 10 ugA 500 116 70-130 <br /> Surrogate 1,2-Dichloroethane-d4 535 Soo 107 70-130 <br /> Matrix Spike(2080016-MSI) Source L208033-05 Prepared&Analyzed 08/15/02 <br /> Methyl ten-butyl ether 623 10 ug/1 500 ND 125 60-140 <br /> iSurrogate�1 2-Dtchloroethane-d4 575 500 115 70-130 <br /> Matrix Spike Dup(2080016-MSDI) Source L208033-05� _Prepared&Analyzed 08/15/02 <br /> 'Methyl ten-butylether— 612 T - 10—ugll --5001 a ND T' —122 N_-60-140 1 78- —25— <br /> Surrogate 1,2-Dichloroelhane-d4 552 500 110 70-130 <br /> Batch 2080017-EPA 5030B JP/Tj <br /> Blank(2080017-BLKI) Prepared&Analyzed 08/16/02 <br /> Ethanol _ ND 500 ug/l <br /> Tert-butyl alcohol ND 20 " <br /> Methyl tert-butyl ether ND 10 " <br /> Dt-isopropyl ether ND 10 " <br /> Ethyl tert-butyl ether ND 10 " <br /> Ten-amyl methyl ether ND to " <br /> Surrogate 1 2-Dichloroethane-d4 550 300 110 70-130 <br /> Sequoia Analytical - San Carlos The results in this report apply to the samples analyzed in accordance with the chain o <br /> custody document Unless otheriwse stated results are reported on a wet weight basrs <br /> This analytical report must be reproduced in its entirety <br /> Page 23 of 36 <br />