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CHROMALAB, INC. <br /> Environmental Services(SDB) <br /> May 28 , 1998 Submission #: 9805267 <br /> 1 ERM-WEST WALNUT CREEK <br /> Atten • James Ackerman <br /> Pr03ect: UP-STOCKTON Project#: 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#• 12921 <br />' Matrix: SOIL <br /> $ Recovery <br /> Sam le# Client Sa=le ID Surrogate Recovered Limits <br /> 186380-1 B-5-261 TRIFLUOROTOLUENE 101 65-135 <br /> 186380-1 B-5-261 4-BROMOFLUOROBENZENE 692 65-135 <br /> 186381-1 B-5-31 . 5 ' TRIFLUOROTOLUENE 91 4 65-135 <br /> 186381-1 B-5-31 . 5 ' 4-BROMOFLUOROBENZENE 179 65-135 <br /> 186382-1 B-5-361 TRIFLUOROTOLUENE 100 65-135 <br /> 186382-1 B-5-36 ' 4-BROMOFLUOROBENZENE 260 65-135 <br /> % Recovery <br /> am le# OC Sam le T4,rpe Surrocrate Recovered Limits <br /> 187550-1 Reagent blank NUB) TRIFLUOROTOLUENE 89 5 65-135 <br /> 187550-1 Reagent blank (!►'IDB) 4-BROMOFLUOROBENZENE 181 65-135 <br />' 187551-1 Spiked blank (BSP) TRIFLUOROTOLUENE 93 . 5 65-135 <br /> 187551-1 Spiked blank (BSP) 4-BROMOFLUOROBENZENE 126 65-135 <br /> 187552-1 Spiked blank dupl2cate (BSD)TRIFLUOROTOLUENE 96 .4 65-135 <br />' 187552-1 Spiked blank duplicate (BSD)4-BROMOFLUOROBENZENE 139 65-135 <br /> 1 <br />' V135 <br /> aCSURR1229 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 />