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404 ISI Wlget Lane <br /> Sequoia Walnut Creek,CA 94598 <br /> 4 (925)988-9600 <br /> Analytical FAX(925)988-9673 <br /> Gettler Ryan Ing -Dublin Project Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal 4 8671 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 18-Nov_99 09 20 <br /> Volatile Organic Compounds by EPA Method 8260A - Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analvte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 9KO5025 Prepared 04-Nov-99 Using EPA 5030B JP/T] <br /> Mater Spike Dup (9K05025-MSD 1) Source W910530-01 <br /> Methyl tent-butyl ether 537 20 ug/I 500 ND 107 60-150 5 16 25 <br /> Surrogate Jrbrornofluorornethare S60 Soo 112 50-150 <br /> Surrogate 1 2 Dichloroelharre-d4 550 500 110 50-150 <br /> • <br /> SeAilalytieal - Walinit Creek The urhs ur llrr s rnporl apply to 11rc scwrple anerlv_ed r rr uceurclrnree svrrh!!re clrurr of <br /> cuslody document Tlrts arxilytical repnrinnrst be reprrxitrcedirrrts entirety <br /> 4510 <br /> l eg ey 'rn1ec t Manage f page; <br />