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r <br /> i <br /> Gettler-RyanlGeostrategies(1) Project Unocal(4) <br /> 6747 Sierra Court,Suite 7 Project Number Former Unocal SS#0187 Reported <br /> Dublin CA,94568 Project Manager Deanna Harding OS/30/Ol 13 32 <br /> Volatile Organic Oxygenated Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - San Carlos <br /> Repotting Spike Source %REC RPD <br /> Analyte Result Limit Chits revel Result %REC Limits RPD Lama Rotes <br /> Batch 1050085-EPA 5030B Prr <br /> LCS(1050085-BS2) Prepared&Analyzed 05/21/01 <br /> Methyl tert-butyl ether 445 200 ugn 500 890 70-130 <br /> Surrogate 12 Dichloroethane-d4 48 7 500 974 76-114 <br /> Matnx Spike(1050085-MS1) Source L105155-07 Prepared&Analyzed 05/19/01 <br /> Methyl tett-butyl ether 528 200 uO 500 4 It 974 60-140 <br /> Surrogate 12 Dichloroethane-d4 51 3 Soo 105 76-114 <br /> Matrix Spike Dup(1050085-MSD1) Source L105155-07 Prepared&Analyzed 05/19/01 <br /> Methyl tett-butyl ether 531 200 USA 50 0 411 980 60-140 0 567 25 <br /> Surrogate 1,2-Dichloroethane-d4 526 500 105 76-114 <br /> • <br /> uota Analytical-San Carlos The results to this report apply to the samples analyzed to accordance with the chain of <br /> custody document 77us analytical report must be reproduced to its entirety <br /> Page 32 of 33 <br />