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CHROMALAB INC. Submission #: 2000-03-0252 <br /> Environmental Services(SDB) <br /> To: CH2M Hill-Oakland Test Method: 8015M <br /> 8020 <br /> Attn: Keith Sheets Prep Method: 5030 <br /> Batch QC Report j <br /> Gas/BTEX <br /> Laboratory Control Spike(LCS/LCSD) Water QC Batch#2000103/21-01.03 <br /> LCS: 2000/03/21-01.03-002 Extracted: 03/21/2000 12:24 Analyzed 03121/2000 12:24 <br /> LCSD: 2000103121-01.03-003 Extracted: 031211200011:51 Analyzed 031211200011:51 <br /> Compound Conc. [ug/L] Exp.Conc. [ug/L] Recovery[%] RPD Ctrl.Limits[°/a] Flags <br /> LCS LCSD LCS LCSD LCS LCSD [%] Recovery RPD LCS LCSD <br /> Gasoline 577 579 500 500 115.4 115.8 0.3 75-125 20 <br /> Benzene 88.6 103 100.0 100.0 88.6 903.0 15.0 77-1233 20 t <br /> Toluene 91.6 105 100.0 100.0 91.6 105.0 13.6 78-122 20 <br /> Ethyl benzene 89.4 913.5 100.0 100.0 89.4 98.5 9.7 70-130 20 <br /> Xylene(s) 263 288 300 300 87.7 96.0 9.0 75-125 20 <br /> Surrogate(s) <br /> Trifluorotoluene 452 520 500 500 90.4 104.0 58-124 <br /> 4-Bromofluorobenzene-FI 519 527 500 500 103.8 105.4 50-150 <br /> i <br /> I <br /> I!I <br /> f <br /> 1220 Quarry LanePleasanton,CA 94566-4756 <br /> Telephone:(925)484-1919'Facsimile:(925)484-1096 �. <br /> Printed on:03123/200011:50 Page 4 Of 4 <br /> rl <br />