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CHROMALAB, INC. <br /> Environmental Services(SDB) <br /> May 22 , 1998 Submission #. 9805267 <br /> ERM-WEST WALNUT CREEK <br /> Atten James Ackerman <br /> Project UP-STOCKTON Pro3ect#: 8187 . 25 <br /> Received: May 18, 1998 <br />' re: Surrogate report for 3 samples for Fuel Oxygenates by GC/MS <br /> analysis. <br /> Method: EPA SW846 Method 8260 Modified <br />' Lab Run# 12843 <br /> Matrix: WATER <br /> $ Recovery <br /> Sam le Client Sam le 1"D Surrogate Recovered Limits <br /> 186377-1 TRIP BLANK D4-1, 2-DICHLOROETHANE 94 . 0 76-114 <br /> 186378-1 B-5 D4-1, 2-DICHLOROETHANE 101 76-114 <br />' 186379-1 B-6 D4-1, 2-DICHLOROETHANE 95 . 8 76-114 <br /> Sample# OC Sample Recovery <br /> Type Surro ate Recovered Limits <br /> b186703-1 Reagent blank (MDB) D4-1, 2-DICHLOROETHANE 102 76-114 <br /> 186704-1 Spiked blank (BSP) D4-1, 2-DICHLOROETHANE 85 6 76-114 <br /> 186705-1 Spiked blank duplicate (BSD)D4-1, 2-DICHLOROETHANE 106 76-114 <br /> 186706-1 Matrix spike (MS) D4-1, 2-DICHLOROETHANE 130 76-114 <br /> 186707-x Matr2x spike duplicate (MSD)D4-1, 2-DICHLOROETHANE 122 76-114 <br /> 1 <br /> 1 <br /> V060 <br /> QCSURRF 229 YT 22 May 98 11 68 0 <br /> 1220 QuarryLane • Pleasanton, California 94566-4756 <br /> (925) 484-1919 • Facsimile (925) 484-1096 <br /> Federal ID#68-0140157 <br />