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EL Client ID 020105306 QUALITY CONTROL RESULTS Volatile Organics <br /> gin Number C4060403 Method EPA 8020 <br /> Project ID (number) 020105306 GTI GC A94 Matrlx Aqueous <br /> Project ID (name) ARCO/#2130/Stockton CA <br /> Matrix Spike and Matrix Spike Duplicate Results <br /> Matrix Matrix Matrix Spike Matrix Shikt <br />' Acceptability Limits <br /> Original Soike Spike Spike Duplicate Uuplicate <br /> Analyte Concentration Amount ConCentration Recovery I Concentration kecover i RPU i RPD i Recovery i <br /> EPA 8020 GTEL Sample ID C4060376-10 Spike IO M062694-3 Dup ID M062694 4 <br />' Units u /L Analysis Date 24-JUN-94 <br /> 26-JUN-94 26-JUN-94 Client ID Batch QC <br /> Benzene < 0 50 20 0 13 8 68 8 13 9 69 3 0 7 34 57 -134" <br /> < 0 50 20 0 16 9 84 1 16 9 84 1 0 31 <br /> Toluene 63-134: <br /> 0 50 2D 0 thy < 17 1 85 2 17 0 84 7 0 5 38 59 3-13;% <br /> Elbenzene ' <br /> E lelbe {Total) < 0 50 60 0 58 3 96 9 57 4 95 4 1 5 31 59 3-144% <br /> Note¢ <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> GTEL <br />' GTEL Concord CA LASODAV0atIIN c <br /> C-060a03 3 <br />