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STL ChromaLab Submission#: 2001-08-0190 <br /> Environmental Services(CA 1094) <br /> To: CH2M Hill-Oakland Test Method: 8015M <br /> 8021 B <br /> Attn.. Keith Sheets Prep Method: 5030 <br /> Batch QC Report <br /> Gas/BTEX by 8015M18021 <br /> Method Blank Water QC Batch#2001108/17-01.05 <br /> MB: 2001108117-01.05-004 Date Extracted: 08/17/200108:54 <br /> Compound Result Re .Limit Units Analyzed Flag <br /> Gasoline ND 50 ug/L 081171200108:54 <br /> Benzene ND 0.5 ug/L 081171200108:54 <br /> Toluene ND 0.5 ug/L 081171200108:54 <br /> Ethyl benzene ND 0.5 ug/L 08/17/200108:54 <br /> Xylene(s) ND 0.5 ug/L 081171200108:54 <br /> Surrogate(s) <br /> Trifluorotoluene 100.6 58-124 % 081171200108:54 <br /> 4-Bromofluorobenzene-FID 79.8 50-150 % 081171200108:54 <br /> i <br /> i <br /> II <br /> I <br /> 1 1220 Quarry Lane•Pleasanton,CA 94566-4756 <br /> ` Telephone:(925)484-1919'Facsimile:(925)484-1096 <br /> Printed on:08128/2001 10:00 Page 5 of 9 <br />