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LC H ROMALAB,(,�N C. Submission #: 1999-07-0488 <br /> Environmental Services(SDB) <br /> To: Earth Systems Consultants Test Method: 8020 <br /> Attn: Jeanne Buckthal Prep Method: 5030 <br /> Batch QC Report <br /> Gas/BTEX (Methanol Extraction) <br /> Laboratory Control Spike (LCS/LCSD) Soil QC Batch # 1999/08/02-05.02 <br /> LCS: 1999/08/02-05.02-002 Extracted: 08/02/199910:07 Analyzed: 08/02/199910:07 <br /> LCSD: 1999/08/02-05.02-003 Extracted: 08/02/199911:03 Analyzed: 08/02/199911:03 <br /> Compound Conc. (mg/Kg] Exp.Conc. [mg/Kg] Recovery[%] RPD Ctrl. Limits[%] Flags <br /> LCS LCSD LCS LCSD LCS LCSD [%] Recovery RPD LCS LCSD <br /> Benzene 0.148 0.144 0.125 0.125 118.4; 115.2 2.7 77-123 35 <br /> Toluene 0.152 0.150 0.125 0.125 121.6 120.0 1.3 78-122 35 <br /> Ethyl benzene 0.160 0.156 0.125 0.125 128.0 124.8 2.5 70-130 35 <br /> Xylene(s) 0.387 0.380 0.375 0.375 103.2 101.3 1.9 75-125 35 <br /> Surrogate(s) <br /> Trifluorotoluene 565 485 500 500 113.0 97.0 53-125 <br /> I' <br /> L . <br /> L ` <br /> C - <br /> � - r <br /> C <br /> 1220 Quant'Lane'Pleasanton,CA 94566-4756 s I <br /> Telephone:(925)4841919'Facsimile:(925)484-1096 <br /> CPrinted on:08/06/1999 08:47 Page 5 of 5 <br /> 1.� <br />