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Submission#: 2001-07-04sa <br /> STL ChromaLab <br /> Environmental Services(CA 1094) <br /> _ To: Wright Environmental Services Inc Test Method: 80216 <br /> Attn: Chris`.Palmer Prep Method: 5030 <br /> Batch QC Report <br /> Gas/BTEX by 8015M/8021 <br /> i <br /> Laboratory Control Spike(LCS/LCSD) Water QC Batch#2001/07/24-01.03 <br /> LCS:. 2001/07/24-01.03-004 Extracted: 07/24/200108:43 Analyzed 07/24/200108:43 <br /> LCSD: 2001/07/24-01.03-005 Extracted: 07/24/200109:14 Analyzed 07/24/200109:14 <br /> Compound Conc. [ug/L] Exp.Conc. [ug/L] Recovery[%] RPD Ctrl.Limits[%] Flags <br /> LCS 'LCSD LCS LCSD LCS LCSD [%] Recovery RPD LCS LCSD <br /> Benzene 89.5 90.9 100:0 100.0 89:5 90:9 1.6 77-123 20 <br /> i <br /> Toluene 85.4 88.3 100.0 100.0 85.4 88.3 3.3 78-122 20 <br /> Ethyl benzene; 87.8 92.3 100.0 100.0 87.8 92.3 5.0 70-130 20 <br /> Xylene(s) 258 270 . 300 300 86.0 90.0 4.5 75-125 20 <br /> Surrogates) <br /> Trifluorotoluene 436 434 500 500 87.2 86.8 58-124 . . <br /> li <br /> .w <br /> 1220 Quarry Lane`Pleasanton,CA 945664756 <br /> Telephone:(925)484-1919`Facsimile:(925)4841096 <br /> Printed on:07/26/2001 13:05 Page 10 of 13 <br />