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CHROMALAB, INC. <br /> En%nronmentW Semces(SDB) <br /> June 2 , 1998 Submission # • 9805422 <br />' ERM-WEST WALNUT CREEK <br /> Atten James Ackerman <br />' Pr03 ect UP-STOCKTON Project#: 8187-2 . 5 <br /> Received May 18, 1998 <br />' re: Surrogate report for 1 sample for Gasoline BTEX analysis <br /> Method. SW846 8020A Nov 1990 / 8015Mod <br /> Lab Run# 12999 <br />' Matrix. SOIL <br /> `k Recovery <br /> Sam le C13.ent Sample ID Surrogate Recovered Limits <br />' 188047-1 B5-40 5 TRIFLUOROTOLUENE 132 65-135 <br /> 188047-1 B5-40 5 4-BROMOFLUOROBENZENE 365 65-135 <br /> % Recovery <br />' Sam le# OC Sample a Surra ate Recovered Limits <br /> 188189-1 Reagent blank (MD13) TRIFLUOROTOLUENE 105 65-135 <br /> 188189-1 Reagent blank (MDB) 4-BROMOFLUOROBENZENE 142 65-135 <br /> 1618,1190-1 Spiked blank (BSP) TRIFLUOROTOLUENE 105 65-135 <br /> 188190-1 Spiked blank (BSP) 4-BROMOFLUOROBENZENE 147 65-135 <br /> 188191-1 Spiked blank duplicate (BSD)TRIFLUOROTOLUENE 96 0 65-135 <br /> 188191-1 Spiked blank duplicate (BSD)4-BROMOFLUOROBENZENE 147 65-135 <br /> 1 <br /> 1 <br />' V135 <br /> QCSURR1229 VINCE 02 Jun-99 15 2 <br />' 1220 Duarry Lane • Pleasanton, California 94566-4756 <br /> (925) 484-1919 • Facsimile (925) 484-1096 <br /> Federal ID#68-0140157 <br />