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Sequoia 1455 McDowelk Blvd North Ste 4 <br /> a- ) <br /> Felaluma,CA 949541865 <br /> rd Analytical (707)792-0342 <br /> FAX(707)792-0342 <br /> www sequotalabs com <br /> Gettler-Ryan/GeostrategteS(I Project Unocal(4) <br /> 6747 Sierra Court, Suite J Projeci Number Former Unocal 40187,Stockton Reported <br /> Dublin CA, 94568 Project Manager Deanna Harding 01124/0116 38 <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 Lunit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2050026-EPA 5030BIP/TJ <br /> Blank(2050026-BLKI) Prepared&Analyzed 05/13/02 <br /> Ethanol ND 500 ug/l W <br /> Tert-butyl alcohol ND 20 " <br /> Methyl tert-butyl ether ND 10 " <br /> Di-isopropyl ether ND 10 " <br /> Ethyl tert-butyl ether ND 10 " <br /> Teri-amyl methyl ether ND 10 " <br /> Surrogate 1 2-Dichloroethane-d4 488 300 976 70-130 , <br /> Blank(2050026-BLK2) Prepared&Analyzed 05/14/02 <br /> Ethanol ND 500 ug/l <br /> Tert-butyl alcohol ND 20 " <br /> Methyl tert-butyl ether NC) I 0 • <br /> Di-isopropyl ether ND 10 " <br /> Ethyl tert-butyl ether ND 10 " <br /> Teri-amyl methyl ether ND 1 0 " <br /> Surrogate -1 2-Dichloroethane-d4 —493 —50 0 —98 6=70-130— — <br /> LC5(2050026-BSI) Prepared&Analyzed 05/13/02 - <br /> =Methyl Cert-butyl ether T-- -- � _=51_1 r ; _ 10---u9/1 —---50 0— ---- 102-=-70-130--=- --- = --- --- - <br /> Surrogate 1,2-Dichloroethane-d4 507 500 101 70-130 <br /> LCS(2050026-BS2) Prepared&Analyzed 05/14/02 <br /> Methyl tert-butyl ether 45 1 10 ug/l Soo 902 70-130 <br /> Surrogate 1,2-Dichloroethane-d4 490 500 980 70-130 <br /> Matrix Spike(2050026-MSI) Source L205039-03 Prepared&Analyzed 05/13/02 <br /> Methyl tert-butyl ether 457 10 ugA Soo ND 91 4 60-144 <br /> Surrogate 12-Dichloroeihane-d4 472 11 500 944 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 This analytical report must be reproduced in its entirety <br /> Page 26 of 30 <br />