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TABLE 1: QUALITY ASSURANCE DATA MAY 13, 1991 <br /> EPA METHOD 602 - AROMATIC VOLATILE ORGANICS (AR12) <br /> Chain of Custody Data Required for ETC Data Hanagement Summary Reports . <br /> See Below <br /> ETC Batch No. <br /> QC' Blank and Spiked Data QC Hatrfx Spike QC Duplicate <br /> BIank Concen. X Unspiked Concen. :X <br /> Compound Concen, Added Recov Sample Added Recov First Second RPD Batch <br /> mg/L mg/L mg/L mg/L mg1L Wg/L <br /> BenzeneND _ _ <br /> Ethylbenzene ND .050 10� QA10799 <br /> Toluene ND 050 99 _ - QA10799 <br /> m+ Xylenes ND .100 101 _ _ _ - QA10799 <br /> o%lene ND .050 103 _ _ - - QA10799 <br /> ' _ - - QA10799 <br /> Matrix splkes and duplicates are not required for a alyticai ba cher <br /> containing only trip blanks/equipment rinsates. <br /> �1 <br />