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1 <br /> CHRQMALAB, INC. <br /> Environmental Services(SAB) <br /> April 20 , 1998 Submasszon #: 9803455 <br /> ' HARDING LAWSON (SACRAMENTO) <br /> Atten: Gary Haeck <br /> ' Protect 38737 004 <br /> Received March 30, 1998 <br /> ' re Surrogate report for 2 samples for Gasoline BTEX analysis <br /> Method SW846 8020A Nov 1990 / 8015Mod <br /> Lab Run#• 12107 <br /> ' Matrix SOIL <br /> $ Recovery <br /> ' Sample# Client Sample ID Surrocrate _ Recovered Limits <br /> 1.77967-1 HP-3SE TRIFLUOROTOLUENE 111 65-135 <br /> 177967-1 HP-3SE 4-BROMOFLUOROBENZENE 97 . 9 65-135 <br /> 177968-1 HP-3SF TRIFLUOROTOLUENE 99 . 7 65-135 <br /> ' 177968-1 HP-3SF 4-BROMOFLUOROSENZENE 79 . 3 65-135 <br /> % Recovery <br /> Sample# OC Sample Type Surrogate _ Recovered Limits <br /> 19845-x Reagent blank (MDB) TRIFLUOROTOLUENE 77 1 65-135 <br /> 9845-1 Reagent blank (MMB) 4-BROMOFLUOROSENZENE 56 . 1 65-135 <br /> 179846-1 Spiked blank (BSP) TRIFLUOROTOLUENE 93 . 6 65-135 <br /> 179846-1 Spiked blank (BSP) 4-BROMOFLUOROBENZENE 83 . 5 65-135 <br /> 179847-1 Spiked blank duplicate (BSD)TRIFLUOROTOLUENE 95 9 65-135 <br /> 179847-1 Spiked blank duplicate (BSD)4--BROMOFLUOROBENZENE 68 . 6 65-135 <br /> 179848-1 Matrix spike (MS) TRIFLUOROTOLUENE 82 8 65-135 <br /> 179848-1 Matrix spike (MS) 4-BROMOFLUOROBENZENE 56 3 65-135 <br /> 179849-1 Matrix spike duplicate (MSD)TRIFLUOROTOLUENE 82 4 65-135 <br /> 179849-1 Matrix spike duplicate (MSD)4-BROMOFLUOROBENZENE 69 . 5 65-135 <br /> V132 <br /> QCSURR1229 BUBBA 20 Apr 98 16 4 <br /> ' 1220 Quarry Lane • Pleasanton, California 94566-4756 <br /> (510) 484-1919• Facsimile (510) 484-1096 <br /> Federal ID #68-0140157 <br />