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CHROMALAB, INC. <br /> Environmental Services(SDB) <br /> April 2 , 1998 Submission # 9803309 <br /> ' AQUA SCIENCE ENGINEERS INC <br /> Atten Charlie Rous <br /> ' Project: UNOCAL Prof ect#= 3254 <br /> Received March 20 , 1998 <br /> re Surrogate report for 1 sample for Gasoline BTEX analysis <br /> Method SW846 8020A Nov 1990 / 8015Mod <br /> Lab Run# 11921 <br /> ' Matrix SOIL <br /> o Recover <br /> Sample# Client Sample ID Surrogate Recovered Limits <br /> 176540-1 BH-A@6 5 ' TRIFLUOROTOLUENE 265 65-131 <br /> 176540-1 BH-A@6 5 ' 4-BROMOFLUOR013ENZENE 1080 65-13` <br /> % Recover <br /> a <br /> Sam le# OC Sample -Type Surrocrate Recovered Limits <br /> 178146-1 Reagent blank (1M)B) TRIFLUOROTOLUENE 79 2 65-13 <br /> 178146-1 Reagent blank (MMB) 4-BROMOFLUOROBENZENE 118 65-13' <br /> 1178147-1 Spiked blank (BSP) TRIFLUOROTOLUENE 80 8 65-13 <br /> 178147-1 Spiked blank (BSP) 4-BROMOFLUOROBENZENE 110 65-13 <br /> 178148-1 Spiked blank duplicate (BSD)TRIFLUOROTOLUENE 92 4 65-13 <br /> 178148-1 Spiked blank duplicate (BSD)4-BROMOFLUOROBENZENE 100 65-13 <br /> i <br /> 1 <br /> V135 <br /> OCSURR1229 VINCE 02 Apr 98 1 <br /> ' 1220 Quarry Lane• Pleasanton, California 94566-4756 <br /> (510) 484-1919 • Facsimile (510) 484-1096 <br /> Federal 1D #68-0140157 <br />