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404 N %Mget Lane <br /> Sequoia <br /> Walnut (25)CA 94598 <br /> 988-9600 <br /> ID FAX(925)9$8-%73 <br /> Analytical www sequolalabs`°m <br /> Gettler Ryan,Inc -Dublin Project Unocal <br /> 6747 Sierra Court Suite t Project Number Former Unocal#4409 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 25-Oct-0018 31 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lunn Units Level Result %REC Luurts RPD Limit Notes <br /> Batch 0J19027-EPA 5030B [PIT] <br /> Blank(0J19027-BLK1) Prepared&Analyzed 19-Oct-00 <br /> Ethanol ND 500 ugA <br /> tett-Butyl alcohol ND 50 " <br /> Methyl tat-butyl other ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tat-butyl ether ND 20 " <br /> ted-Amyl methyl ether ND 20 " <br /> 1,2-Dtchlomdhane ND 20 " <br /> Ethylene drbronude ND 20 " <br /> Surrogate Dibrom0fluoromeo mre 510 50.0 102 50-150 <br /> Sarrogade 1,1-Drchlor uediaix-eY 500 Soo 100 50.150 <br /> B&(OJ19027-BLK3) Prepared&Analyzed 20-Oct-00 <br /> EBW ND 500 ugll <br /> tart-Butyl alcohol ND 50 " <br /> Mathyl text-butyl ether ND 20 " <br /> Dr-isopropyl ether ND 20 " <br /> Ethyl tat butyl other ND 20 " <br /> tat-Amyl.mdhyl ether ND 20 " <br /> 1,2-Duddoroothana ND 20 " <br /> Ethylene ddronude ND 20 " <br /> Surrogate Dubromofluoronu dhmte 500 500 100 50-150 <br /> Surrogate 1,1 Dtchforoed lane-d4 490 500 98.0 50-150 <br /> LCS(0J19027-BSI) Prepared&Analyzed 19-Oct-00 <br /> Methyl cwt-butyl ether 439 20 ugll 500 878 70-130 <br /> Surrogate Dibromofluoromed me 490 500 9&0 50-150 <br /> Surrogate 1,1-Dieldoroedltane-d4 48.0 500 96.0 50-150 <br /> la Analytical-Walnut Grego The results in thus r+epord gpply to the samples analyzed rn accordance with the cha rn of <br /> custody docurnemL This arna fyfical nepori must be reproduced in its aubirmy <br /> Page 7 of 9 <br />