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CHROMALAB, INC. <br /> EmtronmentW SeMm(SOB) <br /> April 7, 1999 Submission #: 9904031 <br /> SECOR CONCORD <br /> Atten: TOM CROSBY <br /> ' Project: LYON INVESTMENTS Project#: 70139-004-02 <br /> Received: April 1, 1999 <br /> re: Surrogate report for 2 samples for Volatile Organics by GC/MS <br /> analysis. <br /> ' Method: SW846 Method 8260A Sept 1994 <br /> Lab Run#: 18194 <br /> Matrix: SOIL <br /> ' % Recovery <br /> Sample# Client Sample ID Surrogate Recovered Limits <br /> 235151-1 GP-1, 7 . 5 ' 4-BROMOFLUOROBENZENE 104 74-121 <br /> ' 235151-1 GP-1, 7 . 5 ' D4-1,2-DICHLOROETHANE 96 . 5 70-121 <br /> 235151-1 GP-1, 7. 5 ' D8-TOLUENE 104 81-117 <br /> 235153-1 GP-3 , 9 . 5 ' 4-BROMOFLUOROBENZENE 105 74-121 <br /> 235153-1 GP-3 , 9 .5 ' D4-1,2-DICHLOROETHANE 89.7 70-121 <br /> ' 235153-1 GP-3 , 9 . 5 ' D8-TOLUENE 103 81-117 <br /> % Recovery <br /> Sample# OC Sample Type Surrogate Recovered Limits <br /> ' 235433-1 Reagent blank (MDB) 4-BROMOFLUOROBENZENE 103 74-121 <br /> 235433-1 Reagent blank (MDB) D4-1, 2-DICHLOROETHANE 100 70-121 <br /> 235433-1 Reagent blank (MDB) D8-TOLUENE 108 81-117 <br /> ' 235434-1 Spiked blank (BSP) 4-BROMOFLUOROBENZENE 104 74-121 <br /> 235434-1 Spiked blank (BSP) D4-1, 2-DICHLOROETHANE 99 .3 70-121 <br /> 235434-1 Spiked blank (BSP) D8-TOLUENE 105 81-117 <br /> 235435-1 Spiked blank duplicate (BSD)4-BROMOFLUOROBENZENE 101 74-121 <br /> ' 235435-1 Spiked blank duplicate (BSD)D4-1,2-DICHLOROETHANE 96 .7 70-121 <br /> 235435-1 Spiked blank duplicate (BSD)D8-TOLUENE 108 81-117 <br /> ' V053 <br /> QCSUPN1229 JIMB 07-Apr-99 10 <br /> 1220 Quarry Lane • Pleasanton, Cafrfornia 94566-4756 <br /> ' (925)484-1919 • Facsimile(925)484-1096 <br /> Federal ID 7168-0140157 <br />