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i <br /> Gettler-Ryan/Geoslrategies(1) Praject Tosco(I) <br /> 6747 Sierra Court,Suite! Prom Nwnber' Former Unocal SS#4409 a` {`a <br /> Dubirn CA,94568 Prom Manager' Deanna Harding 07/23//0011 08 28 <br /> Volatile Organic 8 Oxygenated Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical- San Carlos <br /> a SP&C soume RM <br /> A-Iy< Rauh Umrt unm Level Result Y.REC Llmrts RPD l mrt Nona <br /> Batch 1070064-EPA 5030B IPM <br /> Blank(1070064-BLKI) Prepared&Analyzed 07/13/01 <br /> Ethanol ND 1000 U911 <br /> 1,2-Dtbromoetbane ND 20 " <br /> 1,2-Dlchloroethane ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tertbutyl ether ND 20 " <br /> Methyl tertbirtyl aha ND 20 " <br /> Tert-wmyl methyl ether ND 20 " <br /> 50 0 89 4 76-114 <br /> - <br /> Surrogate 1,2-Drchloroethane-& 447 " <br /> gate Toluene-d8 SI 2 SO 0 101 88-110 <br /> k(1070064-BLK2) prepared&Analyzed 07/16/01 <br /> Ethanol ND 1000 11g/1 <br /> 1,2-Dibromoethanc ND 20 " <br /> 1,2-Dichlorocthane ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tat-butyl e d w ND 20 " <br /> Methyl tent-butyl ether ND 20 " <br /> Tart-amyl methyl ether ND 20 " <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate 1,1 Dichloroethane-d4 417 Soo 834 76-114 <br /> Surrogate Toluene-d8 490 " SO 0 980 88-110 <br /> LCS(1070064-BSI) P aged&Analyrxd 07/13/01 <br /> Methyl tertbutyl ether 474 20 118/1 Soo 948 70-130 <br /> Surrogate 1,2-Dlchloroethane-l4 459 500 918 76-114 <br /> Surrogate Toluene-A 521 500 104 88-110 <br /> The results in this report apply to the samples analyzed in accordance with the chain of <br /> Sequoia AnalytlCal-San Car1o8 <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 10 of 13 <br />