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r <br /> STL ChromaLab Submission #: 2001-05-0569 <br /> Environmental Services(CA 109-4) <br /> ( 1, To: San Joaquin Company, Inc. Test Method: 8020 <br /> Attn.: Bernie Dietz Prep Method: 5030 <br /> Batch QC Report <br /> Gas/BTEX <br /> i <br /> Matrix Spike(MS I MSD ) Water QC Batch#2001106106-01.02 <br /> Sample ID: MW-2 Lab Sample ID: 2001-05-0569-002 <br /> i t MS: 2001106106-01.02-016 Extracted:06/06/2001 16:05 Analyzed: 06/06/2001 16:05 Dilution: 1.0 <br /> MSD: 2001106106-01.02-017 Extracted:06/061200116:37 Analyzed: 061061200116:37 Dilution: 1.0 <br /> Compound Cona [ug/L] Exp.Conc. [ug1L] Rec ery[% RPD Ctrl. Limits[%] Flags <br /> MS MSD Sample MS I MSD MS MSD [%] Recovery RPD I MS MSD <br /> Benzene 93.9 99.0 ND 100.0 100.0 93"9 99.0 5.3 65-135 20 <br /> Toluene 95.0 101 ND 100.0 100.0 95.0 101.0 6.1 65-135 20 <br /> Ethyl benzene 107 113 ND 100.0 100.0 107.0 113.0 5"5 65-135 20 <br /> Xylene(s) 267 281 ND 300 300 89.0 93.7 5.1 65-135 20 <br /> Surrogate(s) <br /> Trifluorotoluene 511 523 500 500 102.2 104.6 58-124 <br /> i <br /> II <br /> s I <br /> i <br /> 1220 Qua"Lane'Pleasanton,CA 94566-4756 <br /> Telephone:(925)464-1919'Facsimile:(925)484-1096 <br /> Printed on:06/07/2001 15:04 Page 15 of 17 <br /> i <br /> ' ii <br />