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i <br /> STL ChromaLab <br /> Submission #: 2001-08.0154 <br /> E=nvironmental Services(CA 1094) <br /> To: CH2M Hill-Oakland Test Method: 80218 <br /> Attn: Keith Sheets Prep Method: 5030 <br /> Batch QC Report <br /> Gas/BTEX by 8015M/8021 <br /> Laboratory Control Spike(LCS/LCSD) Wafer QC Batch#2001108115-01.03 l <br /> LCS: 2001/08/15-01.03-010 Extracted: 08115/200112:40 Analyzed 08/151200112:40 <br /> LCSD: 2001/08115-01.03-011 Extracted: 08115/200113:11 Analyzed 081151200113:11 <br /> o. u <br /> Compound Conc. [uglL] Exp.Cone. [uglL] Recovery[/o] RPD Ctrl.Limits[0/61 Flags <br /> LCS LCSD LCS LCSD LCS LCSD [%] Recovery RPD LCS LCSD <br /> Benzene 88.8 80.6 100.0 100.0 88.8 80.6 9.7 77-123 20 <br /> Toluene 86.1 80.7 100.0 100.0 88.1 80.7 8.8 78-122 20 <br /> Ethyl benzene 89.6 83.1 100.0 100.0 89.6 83.1 7.5 70-130 20 <br /> Xylene(s) 263 247 300 300 87.7 82.3 6.4 75-125 20 <br /> Surrogate(s) <br /> Trinuorotoluene 439 392 500 500 87.8 78.4 56-124 <br /> { <br /> i <br /> i <br /> i <br /> 1220 Quarry Lane*Pleasanton,CA 94666-4756 <br /> Telephone:(925)484-1919facsimile:(926)484-1096 <br /> Printed on:08115/2001 17:27 Page 14 of 14 <br />