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CHROMALAB, INC. Submission#: 1999-12-0377 ) <br /> Environmental Services(SDB) <br /> To: CH21E11 Hill-Oakland Test Method: 8260A <br /> Attn: Keith Sheets Prep Method: 5030 <br /> Batch QC Report <br /> Volatile Organics by GC/MS- EPAS260A j <br />. l <br /> Laboratory Control Spike(LCS/LCSD) Water QC Batch#1999112123-01.27 <br /> LCS: 1999112/23-01.27-002 E=xtracted: 12123/199911:49 Analyzed: 12/23/199911:49 <br /> LCSD: 1999/12/23-01.27-003 Extracted: 12/23/199913:54 Analyzed: 12/23/199913:54 f <br /> i . <br /> Compound Conc. [ug/L] Exp.Conc. [ug/L] Recovery[% RPD Ctrl. Limits[%] Flags <br /> LCS LCSD LCS LCSD LCS LCSD I%] Recovery RPD LCS LCSD <br /> Benzene 44.5 44.5 50.0 50.0 89.0 89.01 0.0 69-129 20 <br /> Chlorobenzene 56.2 53.4 50.0 50.0 112.4 106.8 5.1 61-121 20 ! <br /> 1,1-Dichloroethene 44.4 43.7 50.0 50.0 88.8 87.4 1.6 65-125 20 I <br /> _ Toluene 44.9 43.3 50.0 50.0 89.8 86.6 3.6 70-130 20 <br /> Trichloroethene 42.4 42.8 50.0 50.0 84.8 85.6 0.9 74-134 20 <br /> Surrogate(s) <br /> 4-Bromofluorobenzene 488 491 500 500 97.6 98.2 86-115 <br /> 1,2-Dichloroethane-d4 482 513 500 500 96.4 102.6 76-114 <br /> Toluene-d8 475 479 500 500 95.0 95.8 88-110 <br /> l <br /> I . <br /> i. <br /> r <br /> i <br /> J . <br /> ;l <br /> 1220 Quarry Lane`Pleasanton,CA 94566-4756 i <br /> Telephone:(925)484-1919Facsimile:(925).4841096 <br /> Printed on:0.1103/200015:10 Page 11 of 12 <br />