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i <br /> C H RO MALAB, INC. Submission #: 1999-12-0377 <br /> Environmental Services(SDB) <br /> To: CH2M Hill-Oakland Test Method: 8020 <br /> 8015M I <br /> Attn. Keith Sheets Prep Method: 5030 <br /> Batch QC Report L. <br /> Gas/BTEX <br /> Laboratory Control Spike(LCSILCSD) Soil QC Batch#1999112127-01.04 <br /> LCS: 1999/12/27-01.04-002 Extracted: 12/27/1999 07:42 Analyzed: 12/27/1999 07:42 <br /> LCSD: 1999/12/27-01.04-003 Extracted: 12/27/1999 08:09 Analyzed: 12/27/1999 08:09 <br /> Compound Cone. [mg/Kg] Exp.Conc. [mg/Kg] Recovery[% RPD Ctrl. Limi#s[%] Flags <br /> i <br /> LCS LCSD LCS LCSD LCS LCSD [%) Recovery RPD LCS LCSD <br /> Gasoline 0.497 0.499 0.500 0.500 99.4 99.8 0.4 75-125 35 <br /> Benzene 0.0867 0.0847 0.1000 0.1000 86.7 84.7 2.3 77-123 35 ! . <br /> _ Toluene 0.0875 0.0864 0.1000 0.1000 87.5 86.4 1.3 78-122 35 <br /> Ethyl benzene 0.0887 O.OB82 0.1000 0.1000 88.7 88.2 0.6 70-130 35 <br /> Xylene(s) 0.259 0.259 0.300 0.300 86.3 86.3 0.0 75-125 35 r <br /> l <br /> Surrogate(s) <br /> Trifluorotoluene 340 319 500 500 68.0 63.8 53-125 <br /> 4-Bromofluorobenzene-FI 381 398 500 500 76.2 79.6 58-124 <br /> I <br /> . f <br /> . i <br /> 1220 Quarry Lane"Pleasanton,CA 94566-4756 <br /> 1 <br /> Telephone:(925)484-1919Facsimile:(925)484-1096 <br /> Printed on:01/0312000 Page 17 of 20 <br />