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American Ewi1-onmewal Neta-ork <br />QUALITY CONTROL DATA <br />AEN JOB NO: 9705336 <br />SAMPLE SPIKED: SAND <br />DATE(S) ANALYZED: 05/29-06/02/97 <br />MATRIX: SOIL <br />Method Blank and Spike Recovery Summary <br />Inst./ <br />Analyte Method <br />Ag, <br />Silver <br />ICP/6010 <br />As, <br />Arsenic <br />4000/7060 <br />Ba, <br />Barium <br />ICP/6010 <br />Cd, <br />Cadmium <br />ICP/6010 <br />Cr, <br />Chromium <br />ICP/6010 <br />Cu, <br />Copper <br />ICP/6010 <br />Hg, <br />Mercury <br />Hg/7471 <br />Ni, <br />Nickel <br />ICP/6010 <br />Pb, <br />Lead <br />ICP/6010 <br />Se, <br />Selenium <br />4000/7740 <br />T1, <br />Thallium <br />4000/7841 <br />Zn, <br />Zinc. . <br />ICP/6010 <br />Blank <br />Result <br />(mg/kg) <br />ND <br />ND <br />ND <br />ND <br />ND <br />ND <br />ND <br />ND <br />ND <br />ND <br />ND <br />ND <br />Spike <br />Added <br />(mg/kg) <br />5 <br />10 <br />100 <br />10 <br />50 <br />50 <br />0.4 <br />50 <br />50 <br />20 <br />10 <br />50 <br />Percent <br />Recovery RPD <br />105 <br />2 <br />102 <br />4 <br />108 <br />2 <br />101 <br />3 <br />102 <br />2 <br />102 <br />2 <br />100 <br /><1 <br />102 <br />2 <br />103 <br />1 <br />97 <br />4 <br />104 <br />3 <br />95 <br />1 <br />*** END OF REPORT *** <br />PAGE 12 <br />QC Limits <br />Percent <br />Recovery RPD <br />60-120 <br />10 <br />77-141 <br />15 <br />80-115 <br />10 <br />87-110 <br />10 <br />85-110 <br />10 <br />87-113 <br />10 <br />79-118 <br />15 <br />90-120 <br />10 <br />90-120 <br />10 <br />70-127 <br />13 <br />75-125 <br />20 <br />83-111 <br />10 <br />