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CHROMALAB, INC. <br /> Environmental Services(SDB) <br /> 1 <br /> April 9, 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 1 sample for Volatile Organics by GC/MS <br /> analysis . <br /> Method: SW846 Method 8260A Sept 1994 <br /> Lab Run#: 18252 <br /> Matrix: WATER <br /> ' Recovery <br /> Sample# Client Sample ID Surrocrate Recovered Limits <br /> 235142-1 GP-4 4-BROMOFLUOROBENZENE 103 86-115 <br /> ' 235142-1 GP-4 D4-1, 2-DICHLOROETHANE 87. 0 76-114 <br /> 235142-1 GP-4 D8-TOLUENE 99 . 0 88-110 <br /> % Recovery <br /> ' _S_ample# OC Sample Type Surrogate Recovered Limits <br /> 235893-1 Reagent blank (MDB) 4-BROMOFLUOROBENZENE 98 .4 86-115 <br /> 235893-1 Reagent blank (NIDB) D4-1, 2-DICHLOROETHANE 113 76-114 <br /> 235893-1 Reagent blank (NIDB) D8-TOLUENE 98 . 8 88-11C <br /> ' 235894-1 Spiked blank (BSP) 4-BROMOFLUOROBENZENE 105 86-115 <br /> 235894-1 Spiked blank (BSP) D4-1, 2-DICHLOROETHANE 110 76-114 <br /> 235894-1 Spiked blank (BSP) D8-TOLUENE 97 . 0 88-11C <br /> 235895-1 Spiked blank duplicate (BSD)4-BROMOFLUOROBENZENE 100 86-115 <br /> 235895-1 Spiked blank duplicate (BSD)D4-1,2-DICHLOROETHANE 105 76-114 <br /> 235895-1 Spiked blank duplicate (BSD)D8-TOLUENE 105 88-11( <br /> 235896-1 Matrix spike (MS) 4-BROMOFLUOROBENZENE 97. 8 86-115 <br /> ' 235896-1 Matrix spike (MS) D4-1, 2-DICHLOROETHANE 91. 6 76-114 <br /> 235896-1 Matrix spike (MS) D8-TOLUENE 96 . 8 88-11C <br /> 235897-1 Matrix spike duplicate (MSD)4-BROMOFLUOROBENZENE 99 . 0 86-11E <br /> ' 235897-1 Matrix spike duplicate (MSD)D4-1, 2-DICHLOROETHANE 90 .4 76-11/ <br /> 235897-1 Matrix spike duplicate (MSD)D8-TOLUENE 101 88-11( <br /> 1 <br /> V093 <br /> OC9URR1229 VT 09-Apr-9914:37: <br /> 1220 QuarryLane • Pleasanton, California 94566-4756 <br /> 1� (925) 484-1919 • Facsimile (925) 484-1096 <br /> Federal ID#68-0140157 <br />