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U <br /> CHROMALAB, INC. Submission #: 2000-12-0334 <br /> Environmental Services(SDB) <br /> To: P.G.B E-SF Environmental Support& Services Test Method: 8015M <br /> 8020 <br /> Attn: Gary Pforr Prep Method: 5030AEXT <br /> Batch QC Report <br /> Gas/BTEX (High Level) <br /> Laboratory Control Spike(LCS/LCSD) Soil QC Batch#2000/12119-05.01 <br /> LCS: 2000/12/19-05.01-002 Extracted: 12/19/200013:51 Analyzed 12/19/200013:51 <br /> LCSD: 2000/12/19-05.01-003 Extracted: 12/19/200014:23 Analyzed 12/19/200014:23 <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 /> Gasofine 0.586 0.597 0.625 0.625 93.8 95.5 1.8 75-125 35 I j <br /> Benzene 0.121 0.125 0.125 0.125 96.8 100.0 3.3 77-123 35 <br /> Toluene 0.106 0.108 0.125 0.125 84.8 86.4 1.9 78-122 35 <br /> Ethyl benzene 0.120 0.118 0.125 0.125 96.0 94.4 1.7 70-130 35 <br /> Xylene(s) 0.367 0.365 0.375 0.375 97.9 97.3 0.6 75-125 35 <br /> Surrogate(s) <br /> Trifluorotoluerie 445 450 500 500 89.0 90.0 53-125 <br /> 4-Bromofluorobenzene-FI 395 375 500 500 79.0 75.0 58-124 <br /> 1� <br /> I <br /> I <br /> 1220 Quarry LanePleasanton,CA 94566-4755 <br /> Telephone:(925)484-1919'Facsimile:(925)484-1096 L <br /> Printed on:12/20/2000 09:30 Page 4 Of 5 <br />