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CHROMALAB, INC. <br /> Environmental Services(SDB) <br /> August 15, 1997 Submission #: 9708106 <br /> HARDING LAWSON (SACRAMENTO) <br /> Atten Gary Haeck <br /> Project: TVG-THORNTON Protect# 38737 . 002 <br /> Received: August 8 , 1997 <br />' re. Surrogate report for 6 samples for Gasoline BTEX analysis . <br /> Method: SW846 8020A Nov 1990 / 8015Mod <br /> Lab Run#: 8162 <br /> Matrix• WATER <br /> Recovery <br /> SAM1e# Client Sample ID _ Surrogate Recovered Limits <br /> 143154-1 970807MW1 TRIFLUOROTOLUENE 92 5 65-135 <br /> 143154-1 970807MW1 4-BROMOFLUOROBENZENE 86 . 4 65-135 <br /> 143155-1 970807MW2 TRIFLUOROTOLUENE 91 . 1 65-135 <br /> 143155-1 970807MW2 4-BROMOFLUOROBENZENE 86 . 3 65--135 <br /> 143156-1 970807MW3 TRIFLUOROTOLUENE 95 1 65-135 <br /> 143156-1 970807MW3 4-BROMOFLUOROBENZENE 90 . 5 65-135 <br /> 043158-.1 <br /> 3157-1 970807MW4 TRIFLUOROTOLUENE 96 . 9 65-135 <br /> 3.157-1 970807MW4 4-BROMOFLUOROBENZENE 84 . 1 65-135 <br /> 970807MW5 TRIFLUOROTOLUENE 92 . 0 65-135 <br /> 143158-1 970807MWS 4-BROMOFLUOROBENZENE 86 0 65-135 <br />' 143159-1 970807MW6 TRIFLUOROTOLUENE 90 2 65-135 <br /> 143159-1 970807MW6 4-BROMOFLUOROBENZENE 87 . 6 65-135 <br /> % Recovery <br /> SgMle# QC Sam le Type Surrogate Recovered Limits <br />' 143288-1 Reagent blank (MDB) TRIFLUOROTOLUENE 101 65-135 <br /> 143288-1 Reagent blank (MDB) 4-BROMOFLUOROBENZENE 94 3 65-135 <br /> 143292-1 Spiked blank (BSP) TRIFLUOROTOLUENE 91 8 65-135 <br /> 143292-1 Spiked blank (BSP) 4-BROMOFLUOROBENZENE 96 6 65-135 <br /> 143293-1 Spiked blank duplicate (BSD)TRIFLUOROTOLUENE 94 . 4 65-135 <br /> 143293-1 Spiked blank duplicate (BSD)4-BROMOFLUOROBENZENE 97 . 8 65-135 <br /> 143389-1 Matrix spike (MS) TRIFLUOROTOLUENE 105 65-135 <br /> 143389-1 Matrix spike (MS) 4-BROMOFLUOROBENZENE 1.32 65-135 <br /> 143390-1 Matrix spike duplicate (MSD)TRIFLUOROTOLUENE 104 65-135 <br /> 143390-1 Matrix spike duplicate (MSD)4-BROMOFLUOROBENZENE 133 65-135 <br /> V132 <br /> 4GSURR1229 RUi10 IS Aug 97 71 3 <br /> 1220 Quarry Lane • Pleasanton, California 94566-4756 <br /> ' (510) 484-1919• Facsimile (510) 484-1096 <br /> Federal ID #68-0140157 <br />