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STL GhromaLab submisslon#: 2001-08-0190 <br /> Environmental 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/6021 <br /> ` Laboratory Control Spike(LCS/LCSD) Water QC Batch#2001108117-01.05 <br /> LCS: 2001108117-01.05-009 Extracted: 081171200109:26 Analyzed 081171200109:26 <br /> LCSD: 2001108117-01.05-006 Extracted: 081171200109:59 Analyzed 081171200109:59 <br /> L . <br /> Compound Conc. [ug/L] Exp.Conc. [uglL] Recovery[%] RPD Ctrl.Limits[%] Flags <br /> LCS LCSD LCS LCSD LCS I LCSD [%] Recovery RPD LCS LCSD <br /> Benzene 87.0 86.9 100.0 100.0 87.0 86.9 0.1 77-123 20 <br /> Toluene 86.1 85.8 100.0. 100.0 86.1 85.8 0.3 78-122 20 <br /> Ethyl benzene 83.7 84.3 100.0 100.0 83.7 64.3 0.7 70-130 20 <br /> Xylene(a) 253 257 300 " 300 84.3 85.7 1.6 75-125 20 <br /> Surrogate(s) <br /> } Tritluorololuene 479 473 500 500 95.8 94.6 58-124 <br /> I <br /> f <br /> I <br /> I" <br /> I <br /> I <br /> I � <br /> V- R <br /> 1220 Quarry LanePleasanton,CA 94566-4756 <br /> f Telephone:(925)484-1919"Facsimile:(925)484-1096 <br /> Printed on.08/28/2001 10:00 Page 9 Of 9 <br />