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1 <br /> CHROMALAB, INC. <br /> Environmental Services(SDB) <br /> April 2 , 1998 Submission # 9803309 <br /> ' AQUA SCIENCE ENGINEERS INC <br /> Atten Charlie Rous <br /> ' Pr03ect: UNOCAL Pro3ect#: 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 <br /> Recovery <br /> Sample# Client Sample ID Surrogate Recovered Limits <br /> 176543-1 BH-D@6 5 ' TRIFLUOROTOLUENE 571 65-13 <br /> 176543-1 BH-D@6 5 ' 4-BROMOFLUOROBENZENE 1840 65-13 <br /> % Recover; <br /> Sample# QC Sample Type Surrogate Recovered Limits <br /> 178146-1 Reagent blank (MDB) TRIFLUOROTOLUENE 79 2 65-13 <br /> 178146-z Reagent blank (MDB) 4-BROMOFLUOROBENZENE 118 65-131 <br /> 178147-1 Spiked blank (BSP) TRIFLUOROTOLUENE 80 8 65-131 <br /> 1 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 /> ' V135 <br /> • QCSURR1229 V}NICE 42 Apr 98 1 <br /> 1220 Quarry Lane- Pleasanton, California 94566-4756 <br /> ' (510) 484-1919- Facsimile (510) 484-1096 <br /> Federal ID #68-0140157 <br />