ICPMS daily performance check report, May 21, 2002

NYC 9/11 Public Portal Document

QC Calculated Values Analyte Mass QC Std % Recovery Int Std % Recovery Spike % Recovery Dilution % Diff Dup. Rel. % Diff Be 9 105.519 Li 6 84.501 > Sc-1 45 85.288 Cr 52 99.257 Cr 53 99.239 Mn 55 99.587 Co 59 99.012 Ni 60 97.982 Cu 63 99.111 Cu 65 98.992 Zn 66 105.333 Zn 67 102.247 Zn 68 105.558 > Ge 72 89.717 As 75 105.617 Se 77 111.054 Se 82 109.784 As-1 75 94.915 Kr 83 Ag 107 93.818 Cd 111 100.899 Cd 114 100.835 > In 115 91.071 Sb 121 104.517 Sb 123 105.136 Ba 135 99.450 Ba 137 101.244 Ho 165 > Tb 159 96.072 Hg 201 105.790 Hg 202 103.962 TI 205 99.167 Pb 208 98.189 Calibration Analyte MassCurve Type Correlation Coefficient r Be 9Linear Thru Zero 0.999998 Li 6Linear Thru Zero Sc-1 45Linear Thru Zero Cr 52Linear Thru Zero 0.999999 Cr 53Linear Thru Zero 0.999998 Mn 55Linear Thru Zero 0.999996 Co 59Linear Thru Zero 0.999982 Ni 60Linear Thru Zero 0.999971 Cu 63Linear Thru Zero 1.000000 Cu 65Linear Thru Zero 1.000000 Zn 66LinearThru Zero 0.999977 Zn 67LinearThru Zero 0.999921 Zn 68Linear Thru Zero 0.999997 > Ge 72Linear Thru Zero As 75Linear Thru Zero 0.999947

Sample ID: AE10603 Report Date/Time: Tuesday, May 21, 2002 11:47:30 Page 2

NYC-WTC_000053977