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'iSTL ChromaLab Submission # 2001-040530 <br /> ., <br /> Environmental Services(CA 1094) <br /> To Wright Environmental Services Inc Test Method 8020 <br /> Attn Marla Reid Prep Method 5030 <br /> Batch QC Report <br /> Gas/BTEX <br /> Matrix Spike ( MS 1 MSD) Water QC Batch #2001104/25-0103 <br /> Sample ID MW-1 Lab Sample ID 2001-04-0530-001 <br /> MS 2001/04125-01 03-009 Extracted 04/26/2001 01 16 Analyzed 04/26/2001 01 16 Dilution 1 0 <br /> MSD 2001104/25-01 03-010Extracted 04/26/2001 01 47 Analyzed 04/26/2001 01 47 Dilution 1 0 <br /> Compound Cone, [ug/L] Exp Conc [u /L lRecove [% RPD Ctri Limits[%] Flags <br /> �Ms I MSD (Sample I MS I MSD I MS I MSD [%] Recoveryl RPD I M5 I MSD <br /> Benzene 113 106 NO 1000 1000 1130 1060 64 65-135 20 <br /> Toluene 111 106 NO 1000 1000 1110 1060 46 65-135 20 <br /> Ethyl benzene 110 107 NO 1000 1000 1100 1070 2 8 65-135 20 <br /> Xylene(s) 324 313 NO 300 300 1080 10431 35 65-135 20 <br /> Surrogate(s) <br /> 4-Bromofluorobenzene 560 543 500 500 1120 108 5 50-150 <br /> 1220 Quarry Lane`Pleasanton CA 94566-4756 <br /> Telephone (925)484-1919'Facsimile (925)484-1096 <br /> Printed an 05/02/2001 16 51 Page 17 of 19 <br />