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404 N W19et lane <br /> Sequoia , "" Walnut Geek,CA 94598 <br /> (925)9W96p0 <br /> FAX(925)988-9673 <br /> Analytical '- r �°�alab5 corn <br /> Gettler Ryan,Inc -Dublin Pro,)ect Unocal <br /> r - <br /> 6747 Sierra Court Suite 7 Project Number Unocal#0187 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 14-Mar-Ol 10 19 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Sequ`o1a,Analytical -tWalnut Creek { <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lirmt Units Level Result %REC Lanus RPD Lmut Notes <br /> Batch 1C09010-EPA 5030B(PIT) - <br /> Blank(1C09010-BLK3) Prepared&Analyzed 13-Mar-01 <br /> ten-Butyl alcohol ND 50 Ug/1 <br /> Methyl tart-butyl ether ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tert butyl ether ND 20 " <br /> tert-Amyl methyl ether ND s 20 r <br /> Surrogate Dibromofluoromethane Soo 952 50-150 <br /> Surrogate 1 1-Dichloroethane-d4 42S Soo 850 50-150 <br /> LCS(1C09010-BSI) _ Prepared&Analyzed 09-Mar-01 - <br /> Methyl tert-butyl ether 488 20 ug/1 500 976 70-130 <br /> Surrogate Dibromofluoromethane 526 Soo 105 50-150 <br />- Surrogate 12-Dichloroethane-d4g 436 SO 0 871 -50-1 SO <br /> LCS(1C09010-BS2) — �- - - - --- -- - ^ -� -Prepared&Analyzed 12-Mar-01 <br /> Methyl tent-butyl ether 494, 20 ug/l 500 988 70-130 <br /> Surrogate Dibromofluoromethane 498 " Soo 996 so-ISO <br /> Surrogate 1,2Diehloroethane-d4 391 a 500 782 50-150 <br /> LCS(1C09010-BS3) Prepared&Analyzed 13-Mar-01 <br />—-Methyl tert-butyl ether�--- — _48 3-- - _ --2 0--- u 50 0_ __= --96 6_=-70-130 --- -- _ -- <br /> Surrogate Dibromofluoromethane 517 500 103 50-150 <br /> Surrogate 1 2-Drch1aroeth6ne-d4 T 41S Soo T 830 50-150 <br /> Matrix Spike(1C09010-MS1) Source W102669-24 Prepared&Analyzed 09-Mar-01 <br /> Methyl tent-butyl ether 515 20 ug/1 Soo ND 103 60-150 f <br /> Surrogate Dibromofluoromethane 521 " SO 0 104 50-150 <br /> Surrogate 1 2Dichloroethane-d4 454 500 908 50-150 <br /> r <br /> Sequoia Analytical -Walnut Creek - - The results in this report apply to the samples analyzed in accordance with the chi=n <br /> custody document This analytical report must be reproduced to its enttretw ' <br /> Page 27 of 32 <br />