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Sequoia Walnut <br /> N Lane <br /> t Creek,,CA CA 9.4598 <br /> (925)988-9600 <br /> Analytical FAX(925)988-9673 <br /> Ir <br /> Gettler Ryan,hic -Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco)I 6981 Reported <br /> Dublin CA,94568 Project Manager Deatnia L Harding 10-Feb-0O 11 00 <br /> Volatile Organic Compounds by EPA Method 8260A -Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Umts Level Result %REC Limits RPD Limit Notes <br /> Batch OU02018: Prepared 01-Feb-00 Using EPA 5030B PI <br /> Blank(OB02018-BLKI) <br /> ted-Butyl alcohol ND 100 ug/l <br /> Methyl tert-butyl ether ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl lert-butyl ether ND 20 " <br /> tert-Amyl methyl ether ND 20 " <br /> 1,2-Dichloroethane ND 20 " <br /> Ethylene dibromtde ND 20 " <br /> Surrogate DibrontgJlhioroniethane 500 Soo 100 50-150 <br /> Surrogate 12 Dichloroethone-d4 560 Soo 112 50-150 <br /> MMk(0B02018-BLK2) <br /> I tyl alcobol ND 100 ugll <br /> Methyl tett-butyl ether ND 20 <br /> Di-tsopropyl ether ND 20 <br /> Ethyl tort-butyl ether ND 20 " <br /> tett-Amyl methyl ether ND 20 " <br /> 1,2-Dtchloroethane ND 20 " <br /> Ethylene dibronude ND 20 " <br /> Surrogate Dibronrof2uoromethane 550 500 110 50-150 <br /> Surrogate 12-Drchlorcethane-d4 580 500 116 50-150 <br /> LCS(OB02018-BSI) <br /> Methyl tert-butyl ether 487 20 ugll 500 974 70-130 <br /> Surrogate Dibroinofluoroniethane 510 500 102 50-150 <br /> Surrogate 1,2-Dichloroethane-d4 550 500 110 50-150 <br /> LCS(OB02018-BS2) <br /> Methyl tent-butyl ether 482 20 ug/l 500 964 70-130 <br /> Surrogate Dibroniofluoroniethane 310 Soo 101 50-150 <br /> Surrogate 1 2 Drchlorcethane-d4 560 Soo 112 50-150 <br /> is Analytical-Walnut Creek The results in this report apply to die samples analyred at accordance with die than of custody <br /> document Tks analyaaal repert must be reproducedin to enomy <br /> Alan B Kemp,Laboratory Director Page 18 of 20 <br />