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t <br /> STL ChromaLab Submission #: 2001-08-0194 <br /> Environmental Services(CA 1094) <br /> To: CH2M Hill-Oakland Test Method: 8021 B <br /> Aft Keith Sheets Prep Method: 5030 <br /> Batch QC Report <br /> Gas/BTEX by 8015M18021 <br /> Laboratory Control Spike(LCS/LCSD) Water QC Batch#2001108/16-01.03 <br /> LCS: 2001108/16-01.03-004 Extracted: 081161200108:29 Analyzed 081161200108:29 <br /> LCSD: 2001108/16-01.03-005 Extracted: 081161200108:59 Analyzed 081161200108:59 <br /> I. <br /> Compound Cone. [uglL] Exp.Conc. [ug/L] Recovery[%] RPD Ctrl. Limits[%] Flags <br /> LCS LCSD LCS LCSD LCS LCSD [-%I Recovery RPD LCS LCSD <br /> Benzene 83.6 82.7 100.0 100.0 83.6 • 62.7 1.1 77-123 20 <br /> Toluene 81.9 81.9 100.0 100.0 81.9 81.9 0.0 78-122 20 <br /> Ethyl benzene 82.9 84.4 100.0 100.0 82.9 84.4 1.8 70-130 20 j <br /> Xylene(s) 244 '248 300 300 81.3 82.7 1.7 75-125 20 <br /> surrogate(s) <br /> TrHiuorotoluene 387 387 500 500 77.4 77.4 58-124 <br /> I�I <br /> I • <br /> F <br /> r <br /> I <br /> 1220 Quarry LanePleasanton,CA 945664756 <br /> Telephone:(925)484-1919"Facsimile:(925)484-1096 <br /> Printed on:08/28/2001 10:00 Page 6 of 9 <br />