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I <br /> CHROMALAB, INC. <br /> Environmental Services(SDB) <br />' May 28 , 1998 Submission #: 9805267 <br />' ERM-WEST WALNUT CREEK <br /> Atten James Ackerman <br /> Project: UP-STOCKTON Pr03ect#: 8187 . 25 <br /> Received May 18, 1998 <br />' re. Surrogate report for 3 samples for Gasoline BTEX analysis . <br /> Method: SW846 8020A Nov 1990 / 8015Mod <br /> Lab Run# 12882 <br /> Matrix. WATER <br /> Recovery <br />' <br /> Sample# Client Sam le ID Surra ate Recovered Limits <br /> 186377-1 TRIP BLANK TRIFLUOROTOLUENE 87 . 7 58-124 <br /> 186377-1 TRIP BLANK 4-BROMOFLUOROBENZENE 117 50-150 <br /> 186378-1 B-5 TRIFLUOROTOLUENE 86 . 0 58-124 <br />' 186378-1 B-5 4-BROMOFLUOROBENZENE 116 50--150 <br /> 186379-1 2-6 TRIFLUOROTOLUENE 106 58-124 <br /> 186379-1 B-6 4-BROMOFLUOROBENZENE 137 50-150 <br /> % Recovery <br /> ibaample# OC Sample Type Surrogate Recovered Limits <br /> 187125-1 Reagent blank (NIDB) TRIFLUOROTOLUENE 89 4 58-124 <br /> 187125-1 Reagent blank (MDB) 4-BROMOFLUOROBENZENE 126 50-150 <br /> 187127-1 Spiked blank (BSP) TRIFLUOROTOLUENE 87 . 8 58-124 <br /> 187127-1 Spiked blank (BSP) 4-BROMOFLUOROBENZENE 122 50-150 <br /> 187128-1 Spiked blank duplicate (BSD)TRIFLUOROTOLUENE 86 6 58-124 <br />' 187128-1 Spiked blank duplicate (BSD)4-BROMOFLUOROBENZENE 115 50-150 <br /> 187139-1 Matrix spike (MS) TRIFLUOROTOLUENE 97 . 6 58-124 <br /> 187139-1 Matrix spike (MS) 4-BROMOFLUOROBENZENE 136 50-150 <br />' 187140-1 Matrix spike duplicate (MSD)TRIFLUOROTOLUENE 95 2 58-124 <br /> 187140-1 Matrix spike duplicate (MSD)4-BROMOFLUOROBENZENE 150 50-150 <br />' V132 <br /> O.CSURR1229 VINCE 28 May 98 09 1 <br />' 1220 Quarry Lane • Pleasanton, California 94566-4756 <br /> (925) 484-1919 • Facsimile (925) 484-1096 <br /> Federal ID #68-0140157 <br />